ref: f299607704902a96ed91fbcc4f29af1f645c37bb
parent: d0346f42fdad3ec4f6c6652812829034ac10742d
author: Jacob Moody <moody@posixcafe.org>
date: Sat Feb 25 19:44:25 EST 2023
vendor zlib
--- /dev/null
+++ b/src/gfx/zlib/ChangeLog
@@ -1,0 +1,764 @@
+
+ ChangeLog file for zlib
+
+Changes in 1.2.2 (3 October 2004)
+- Update zlib.h comments on gzip in-memory processing
+- Set adler to 1 in inflateReset() to support Java test suite [Walles]
+- Add contrib/dotzlib [Ravn]
+- Update win32/DLL_FAQ.txt [Truta]
+- Update contrib/minizip [Vollant]
+- Move contrib/visual-basic.txt to old/ [Truta]
+- Fix assembler builds in projects/visualc6/ [Truta]
+
+Changes in 1.2.1.2 (9 September 2004)
+- Update INDEX file
+- Fix trees.c to update strm->data_type (no one ever noticed!)
+- Fix bug in error case in inflate.c, infback.c, and infback9.c [Brown]
+- Add "volatile" to crc table flag declaration (for DYNAMIC_CRC_TABLE)
+- Add limited multitasking protection to DYNAMIC_CRC_TABLE
+- Add NO_vsnprintf for VMS in zutil.h [Mozilla]
+- Don't declare strerror() under VMS [Mozilla]
+- Add comment to DYNAMIC_CRC_TABLE to use get_crc_table() to initialize
+- Update contrib/ada [Anisimkov]
+- Update contrib/minizip [Vollant]
+- Fix configure to not hardcode directories for Darwin [Peterson]
+- Fix gzio.c to not return error on empty files [Brown]
+- Fix indentation; update version in contrib/delphi/ZLib.pas and
+ contrib/pascal/zlibpas.pas [Truta]
+- Update mkasm.bat in contrib/masmx86 [Truta]
+- Update contrib/untgz [Truta]
+- Add projects/README.projects [Truta]
+- Add project for MS Visual C++ 6.0 in projects/visualc6 [Cadieux, Truta]
+- Update win32/DLL_FAQ.txt [Truta]
+- Update list of Z_PREFIX symbols in zconf.h [Randers-Pehrson, Truta]
+- Remove an unnecessary assignment to curr in inftrees.c [Truta]
+- Add OS/2 to exe builds in configure [Poltorak]
+- Remove err dummy parameter in zlib.h [Kientzle]
+
+Changes in 1.2.1.1 (9 January 2004)
+- Update email address in README
+- Several FAQ updates
+- Fix a big fat bug in inftrees.c that prevented decoding valid
+ dynamic blocks with only literals and no distance codes --
+ Thanks to "Hot Emu" for the bug report and sample file
+- Add a note to puff.c on no distance codes case.
+
+Changes in 1.2.1 (17 November 2003)
+- Remove a tab in contrib/gzappend/gzappend.c
+- Update some interfaces in contrib for new zlib functions
+- Update zlib version number in some contrib entries
+- Add Windows CE definition for ptrdiff_t in zutil.h [Mai, Truta]
+- Support shared libraries on Hurd and KFreeBSD [Brown]
+- Fix error in NO_DIVIDE option of adler32.c
+
+Changes in 1.2.0.8 (4 November 2003)
+- Update version in contrib/delphi/ZLib.pas and contrib/pascal/zlibpas.pas
+- Add experimental NO_DIVIDE #define in adler32.c
+ - Possibly faster on some processors (let me know if it is)
+- Correct Z_BLOCK to not return on first inflate call if no wrap
+- Fix strm->data_type on inflate() return to correctly indicate EOB
+- Add deflatePrime() function for appending in the middle of a byte
+- Add contrib/gzappend for an example of appending to a stream
+- Update win32/DLL_FAQ.txt [Truta]
+- Delete Turbo C comment in README [Truta]
+- Improve some indentation in zconf.h [Truta]
+- Fix infinite loop on bad input in configure script [Church]
+- Fix gzeof() for concatenated gzip files [Johnson]
+- Add example to contrib/visual-basic.txt [Michael B.]
+- Add -p to mkdir's in Makefile.in [vda]
+- Fix configure to properly detect presence or lack of printf functions
+- Add AS400 support [Monnerat]
+- Add a little Cygwin support [Wilson]
+
+Changes in 1.2.0.7 (21 September 2003)
+- Correct some debug formats in contrib/infback9
+- Cast a type in a debug statement in trees.c
+- Change search and replace delimiter in configure from % to # [Beebe]
+- Update contrib/untgz to 0.2 with various fixes [Truta]
+- Add build support for Amiga [Nikl]
+- Remove some directories in old that have been updated to 1.2
+- Add dylib building for Mac OS X in configure and Makefile.in
+- Remove old distribution stuff from Makefile
+- Update README to point to DLL_FAQ.txt, and add comment on Mac OS X
+- Update links in README
+
+Changes in 1.2.0.6 (13 September 2003)
+- Minor FAQ updates
+- Update contrib/minizip to 1.00 [Vollant]
+- Remove test of gz functions in example.c when GZ_COMPRESS defined [Truta]
+- Update POSTINC comment for 68060 [Nikl]
+- Add contrib/infback9 with deflate64 decoding (unsupported)
+- For MVS define NO_vsnprintf and undefine FAR [van Burik]
+- Add pragma for fdopen on MVS [van Burik]
+
+Changes in 1.2.0.5 (8 September 2003)
+- Add OF to inflateBackEnd() declaration in zlib.h
+- Remember start when using gzdopen in the middle of a file
+- Use internal off_t counters in gz* functions to properly handle seeks
+- Perform more rigorous check for distance-too-far in inffast.c
+- Add Z_BLOCK flush option to return from inflate at block boundary
+- Set strm->data_type on return from inflate
+ - Indicate bits unused, if at block boundary, and if in last block
+- Replace size_t with ptrdiff_t in crc32.c, and check for correct size
+- Add condition so old NO_DEFLATE define still works for compatibility
+- FAQ update regarding the Windows DLL [Truta]
+- INDEX update: add qnx entry, remove aix entry [Truta]
+- Install zlib.3 into mandir [Wilson]
+- Move contrib/zlib_dll_FAQ.txt to win32/DLL_FAQ.txt; update [Truta]
+- Adapt the zlib interface to the new DLL convention guidelines [Truta]
+- Introduce ZLIB_WINAPI macro to allow the export of functions using
+ the WINAPI calling convention, for Visual Basic [Vollant, Truta]
+- Update msdos and win32 scripts and makefiles [Truta]
+- Export symbols by name, not by ordinal, in win32/zlib.def [Truta]
+- Add contrib/ada [Anisimkov]
+- Move asm files from contrib/vstudio/vc70_32 to contrib/asm386 [Truta]
+- Rename contrib/asm386 to contrib/masmx86 [Truta, Vollant]
+- Add contrib/masm686 [Truta]
+- Fix offsets in contrib/inflate86 and contrib/masmx86/inffas32.asm
+ [Truta, Vollant]
+- Update contrib/delphi; rename to contrib/pascal; add example [Truta]
+- Remove contrib/delphi2; add a new contrib/delphi [Truta]
+- Avoid inclusion of the nonstandard <memory.h> in contrib/iostream,
+ and fix some method prototypes [Truta]
+- Fix the ZCR_SEED2 constant to avoid warnings in contrib/minizip
+ [Truta]
+- Avoid the use of backslash (\) in contrib/minizip [Vollant]
+- Fix file time handling in contrib/untgz; update makefiles [Truta]
+- Update contrib/vstudio/vc70_32 to comply with the new DLL guidelines
+ [Vollant]
+- Remove contrib/vstudio/vc15_16 [Vollant]
+- Rename contrib/vstudio/vc70_32 to contrib/vstudio/vc7 [Truta]
+- Update README.contrib [Truta]
+- Invert the assignment order of match_head and s->prev[...] in
+ INSERT_STRING [Truta]
+- Compare TOO_FAR with 32767 instead of 32768, to avoid 16-bit warnings
+ [Truta]
+- Compare function pointers with 0, not with NULL or Z_NULL [Truta]
+- Fix prototype of syncsearch in inflate.c [Truta]
+- Introduce ASMINF macro to be enabled when using an ASM implementation
+ of inflate_fast [Truta]
+- Change NO_DEFLATE to NO_GZCOMPRESS [Truta]
+- Modify test_gzio in example.c to take a single file name as a
+ parameter [Truta]
+- Exit the example.c program if gzopen fails [Truta]
+- Add type casts around strlen in example.c [Truta]
+- Remove casting to sizeof in minigzip.c; give a proper type
+ to the variable compared with SUFFIX_LEN [Truta]
+- Update definitions of STDC and STDC99 in zconf.h [Truta]
+- Synchronize zconf.h with the new Windows DLL interface [Truta]
+- Use SYS16BIT instead of __32BIT__ to distinguish between
+ 16- and 32-bit platforms [Truta]
+- Use far memory allocators in small 16-bit memory models for
+ Turbo C [Truta]
+- Add info about the use of ASMV, ASMINF and ZLIB_WINAPI in
+ zlibCompileFlags [Truta]
+- Cygwin has vsnprintf [Wilson]
+- In Windows16, OS_CODE is 0, as in MSDOS [Truta]
+- In Cygwin, OS_CODE is 3 (Unix), not 11 (Windows32) [Wilson]
+
+Changes in 1.2.0.4 (10 August 2003)
+- Minor FAQ updates
+- Be more strict when checking inflateInit2's windowBits parameter
+- Change NO_GUNZIP compile option to NO_GZIP to cover deflate as well
+- Add gzip wrapper option to deflateInit2 using windowBits
+- Add updated QNX rule in configure and qnx directory [Bonnefoy]
+- Make inflate distance-too-far checks more rigorous
+- Clean up FAR usage in inflate
+- Add casting to sizeof() in gzio.c and minigzip.c
+
+Changes in 1.2.0.3 (19 July 2003)
+- Fix silly error in gzungetc() implementation [Vollant]
+- Update contrib/minizip and contrib/vstudio [Vollant]
+- Fix printf format in example.c
+- Correct cdecl support in zconf.in.h [Anisimkov]
+- Minor FAQ updates
+
+Changes in 1.2.0.2 (13 July 2003)
+- Add ZLIB_VERNUM in zlib.h for numerical preprocessor comparisons
+- Attempt to avoid warnings in crc32.c for pointer-int conversion
+- Add AIX to configure, remove aix directory [Bakker]
+- Add some casts to minigzip.c
+- Improve checking after insecure sprintf() or vsprintf() calls
+- Remove #elif's from crc32.c
+- Change leave label to inf_leave in inflate.c and infback.c to avoid
+ library conflicts
+- Remove inflate gzip decoding by default--only enable gzip decoding by
+ special request for stricter backward compatibility
+- Add zlibCompileFlags() function to return compilation information
+- More typecasting in deflate.c to avoid warnings
+- Remove leading underscore from _Capital #defines [Truta]
+- Fix configure to link shared library when testing
+- Add some Windows CE target adjustments [Mai]
+- Remove #define ZLIB_DLL in zconf.h [Vollant]
+- Add zlib.3 [Rodgers]
+- Update RFC URL in deflate.c and algorithm.txt [Mai]
+- Add zlib_dll_FAQ.txt to contrib [Truta]
+- Add UL to some constants [Truta]
+- Update minizip and vstudio [Vollant]
+- Remove vestigial NEED_DUMMY_RETURN from zconf.in.h
+- Expand use of NO_DUMMY_DECL to avoid all dummy structures
+- Added iostream3 to contrib [Schwardt]
+- Replace rewind() with fseek() for WinCE [Truta]
+- Improve setting of zlib format compression level flags
+ - Report 0 for huffman and rle strategies and for level == 0 or 1
+ - Report 2 only for level == 6
+- Only deal with 64K limit when necessary at compile time [Truta]
+- Allow TOO_FAR check to be turned off at compile time [Truta]
+- Add gzclearerr() function [Souza]
+- Add gzungetc() function
+
+Changes in 1.2.0.1 (17 March 2003)
+- Add Z_RLE strategy for run-length encoding [Truta]
+ - When Z_RLE requested, restrict matches to distance one
+ - Update zlib.h, minigzip.c, gzopen(), gzdopen() for Z_RLE
+- Correct FASTEST compilation to allow level == 0
+- Clean up what gets compiled for FASTEST
+- Incorporate changes to zconf.in.h [Vollant]
+ - Refine detection of Turbo C need for dummy returns
+ - Refine ZLIB_DLL compilation
+ - Include additional header file on VMS for off_t typedef
+- Try to use _vsnprintf where it supplants vsprintf [Vollant]
+- Add some casts in inffast.c
+- Enchance comments in zlib.h on what happens if gzprintf() tries to
+ write more than 4095 bytes before compression
+- Remove unused state from inflateBackEnd()
+- Remove exit(0) from minigzip.c, example.c
+- Get rid of all those darn tabs
+- Add "check" target to Makefile.in that does the same thing as "test"
+- Add "mostlyclean" and "maintainer-clean" targets to Makefile.in
+- Update contrib/inflate86 [Anderson]
+- Update contrib/testzlib, contrib/vstudio, contrib/minizip [Vollant]
+- Add msdos and win32 directories with makefiles [Truta]
+- More additions and improvements to the FAQ
+
+Changes in 1.2.0 (9 March 2003)
+- New and improved inflate code
+ - About 20% faster
+ - Does not allocate 32K window unless and until needed
+ - Automatically detects and decompresses gzip streams
+ - Raw inflate no longer needs an extra dummy byte at end
+ - Added inflateBack functions using a callback interface--even faster
+ than inflate, useful for file utilities (gzip, zip)
+ - Added inflateCopy() function to record state for random access on
+ externally generated deflate streams (e.g. in gzip files)
+ - More readable code (I hope)
+- New and improved crc32()
+ - About 50% faster, thanks to suggestions from Rodney Brown
+- Add deflateBound() and compressBound() functions
+- Fix memory leak in deflateInit2()
+- Permit setting dictionary for raw deflate (for parallel deflate)
+- Fix const declaration for gzwrite()
+- Check for some malloc() failures in gzio.c
+- Fix bug in gzopen() on single-byte file 0x1f
+- Fix bug in gzread() on concatenated file with 0x1f at end of buffer
+ and next buffer doesn't start with 0x8b
+- Fix uncompress() to return Z_DATA_ERROR on truncated input
+- Free memory at end of example.c
+- Remove MAX #define in trees.c (conflicted with some libraries)
+- Fix static const's in deflate.c, gzio.c, and zutil.[ch]
+- Declare malloc() and free() in gzio.c if STDC not defined
+- Use malloc() instead of calloc() in zutil.c if int big enough
+- Define STDC for AIX
+- Add aix/ with approach for compiling shared library on AIX
+- Add HP-UX support for shared libraries in configure
+- Add OpenUNIX support for shared libraries in configure
+- Use $cc instead of gcc to build shared library
+- Make prefix directory if needed when installing
+- Correct Macintosh avoidance of typedef Byte in zconf.h
+- Correct Turbo C memory allocation when under Linux
+- Use libz.a instead of -lz in Makefile (assure use of compiled library)
+- Update configure to check for snprintf or vsnprintf functions and their
+ return value, warn during make if using an insecure function
+- Fix configure problem with compile-time knowledge of HAVE_UNISTD_H that
+ is lost when library is used--resolution is to build new zconf.h
+- Documentation improvements (in zlib.h):
+ - Document raw deflate and inflate
+ - Update RFCs URL
+ - Point out that zlib and gzip formats are different
+ - Note that Z_BUF_ERROR is not fatal
+ - Document string limit for gzprintf() and possible buffer overflow
+ - Note requirement on avail_out when flushing
+ - Note permitted values of flush parameter of inflate()
+- Add some FAQs (and even answers) to the FAQ
+- Add contrib/inflate86/ for x86 faster inflate
+- Add contrib/blast/ for PKWare Data Compression Library decompression
+- Add contrib/puff/ simple inflate for deflate format description
+
+Changes in 1.1.4 (11 March 2002)
+- ZFREE was repeated on same allocation on some error conditions.
+ This creates a security problem described in
+ http://www.zlib.org/advisory-2002-03-11.txt
+- Returned incorrect error (Z_MEM_ERROR) on some invalid data
+- Avoid accesses before window for invalid distances with inflate window
+ less than 32K.
+- force windowBits > 8 to avoid a bug in the encoder for a window size
+ of 256 bytes. (A complete fix will be available in 1.1.5).
+
+Changes in 1.1.3 (9 July 1998)
+- fix "an inflate input buffer bug that shows up on rare but persistent
+ occasions" (Mark)
+- fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
+- fix gzseek(..., SEEK_SET) in write mode
+- fix crc check after a gzeek (Frank Faubert)
+- fix miniunzip when the last entry in a zip file is itself a zip file
+ (J Lillge)
+- add contrib/asm586 and contrib/asm686 (Brian Raiter)
+ See http://www.muppetlabs.com/~breadbox/software/assembly.html
+- add support for Delphi 3 in contrib/delphi (Bob Dellaca)
+- add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)
+- do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)
+- use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)
+- added a FAQ file
+
+- Support gzdopen on Mac with Metrowerks (Jason Linhart)
+- Do not redefine Byte on Mac (Brad Pettit & Jason Linhart)
+- define SEEK_END too if SEEK_SET is not defined (Albert Chin-A-Young)
+- avoid some warnings with Borland C (Tom Tanner)
+- fix a problem in contrib/minizip/zip.c for 16-bit MSDOS (Gilles Vollant)
+- emulate utime() for WIN32 in contrib/untgz (Gilles Vollant)
+- allow several arguments to configure (Tim Mooney, Frodo Looijaard)
+- use libdir and includedir in Makefile.in (Tim Mooney)
+- support shared libraries on OSF1 V4 (Tim Mooney)
+- remove so_locations in "make clean" (Tim Mooney)
+- fix maketree.c compilation error (Glenn, Mark)
+- Python interface to zlib now in Python 1.5 (Jeremy Hylton)
+- new Makefile.riscos (Rich Walker)
+- initialize static descriptors in trees.c for embedded targets (Nick Smith)
+- use "foo-gz" in example.c for RISCOS and VMS (Nick Smith)
+- add the OS/2 files in Makefile.in too (Andrew Zabolotny)
+- fix fdopen and halloc macros for Microsoft C 6.0 (Tom Lane)
+- fix maketree.c to allow clean compilation of inffixed.h (Mark)
+- fix parameter check in deflateCopy (Gunther Nikl)
+- cleanup trees.c, use compressed_len only in debug mode (Christian Spieler)
+- Many portability patches by Christian Spieler:
+ . zutil.c, zutil.h: added "const" for zmem*
+ . Make_vms.com: fixed some typos
+ . Make_vms.com: msdos/Makefile.*: removed zutil.h from some dependency lists
+ . msdos/Makefile.msc: remove "default rtl link library" info from obj files
+ . msdos/Makefile.*: use model-dependent name for the built zlib library
+ . msdos/Makefile.emx, nt/Makefile.emx, nt/Makefile.gcc:
+ new makefiles, for emx (DOS/OS2), emx&rsxnt and mingw32 (Windows 9x / NT)
+- use define instead of typedef for Bytef also for MSC small/medium (Tom Lane)
+- replace __far with _far for better portability (Christian Spieler, Tom Lane)
+- fix test for errno.h in configure (Tim Newsham)
+
+Changes in 1.1.2 (19 March 98)
+- added contrib/minzip, mini zip and unzip based on zlib (Gilles Vollant)
+ See http://www.winimage.com/zLibDll/unzip.html
+- preinitialize the inflate tables for fixed codes, to make the code
+ completely thread safe (Mark)
+- some simplifications and slight speed-up to the inflate code (Mark)
+- fix gzeof on non-compressed files (Allan Schrum)
+- add -std1 option in configure for OSF1 to fix gzprintf (Martin Mokrejs)
+- use default value of 4K for Z_BUFSIZE for 16-bit MSDOS (Tim Wegner + Glenn)
+- added os2/Makefile.def and os2/zlib.def (Andrew Zabolotny)
+- add shared lib support for UNIX_SV4.2MP (MATSUURA Takanori)
+- do not wrap extern "C" around system includes (Tom Lane)
+- mention zlib binding for TCL in README (Andreas Kupries)
+- added amiga/Makefile.pup for Amiga powerUP SAS/C PPC (Andreas Kleinert)
+- allow "make install prefix=..." even after configure (Glenn Randers-Pehrson)
+- allow "configure --prefix $HOME" (Tim Mooney)
+- remove warnings in example.c and gzio.c (Glenn Randers-Pehrson)
+- move Makefile.sas to amiga/Makefile.sas
+
+Changes in 1.1.1 (27 Feb 98)
+- fix macros _tr_tally_* in deflate.h for debug mode (Glenn Randers-Pehrson)
+- remove block truncation heuristic which had very marginal effect for zlib
+ (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
+ compression ratio on some files. This also allows inlining _tr_tally for
+ matches in deflate_slow.
+- added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)
+
+Changes in 1.1.0 (24 Feb 98)
+- do not return STREAM_END prematurely in inflate (John Bowler)
+- revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)
+- compile with -DFASTEST to get compression code optimized for speed only
+- in minigzip, try mmap'ing the input file first (Miguel Albrecht)
+- increase size of I/O buffers in minigzip.c and gzio.c (not a big gain
+ on Sun but significant on HP)
+
+- add a pointer to experimental unzip library in README (Gilles Vollant)
+- initialize variable gcc in configure (Chris Herborth)
+
+Changes in 1.0.9 (17 Feb 1998)
+- added gzputs and gzgets functions
+- do not clear eof flag in gzseek (Mark Diekhans)
+- fix gzseek for files in transparent mode (Mark Diekhans)
+- do not assume that vsprintf returns the number of bytes written (Jens Krinke)
+- replace EXPORT with ZEXPORT to avoid conflict with other programs
+- added compress2 in zconf.h, zlib.def, zlib.dnt
+- new asm code from Gilles Vollant in contrib/asm386
+- simplify the inflate code (Mark):
+ . Replace ZALLOC's in huft_build() with single ZALLOC in inflate_blocks_new()
+ . ZALLOC the length list in inflate_trees_fixed() instead of using stack
+ . ZALLOC the value area for huft_build() instead of using stack
+ . Simplify Z_FINISH check in inflate()
+
+- Avoid gcc 2.8.0 comparison bug a little differently than zlib 1.0.8
+- in inftrees.c, avoid cc -O bug on HP (Farshid Elahi)
+- in zconf.h move the ZLIB_DLL stuff earlier to avoid problems with
+ the declaration of FAR (Gilles VOllant)
+- install libz.so* with mode 755 (executable) instead of 644 (Marc Lehmann)
+- read_buf buf parameter of type Bytef* instead of charf*
+- zmemcpy parameters are of type Bytef*, not charf* (Joseph Strout)
+- do not redeclare unlink in minigzip.c for WIN32 (John Bowler)
+- fix check for presence of directories in "make install" (Ian Willis)
+
+Changes in 1.0.8 (27 Jan 1998)
+- fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant)
+- fix gzgetc and gzputc for big endian systems (Markus Oberhumer)
+- added compress2() to allow setting the compression level
+- include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)
+- use constant arrays for the static trees in trees.c instead of computing
+ them at run time (thanks to Ken Raeburn for this suggestion). To create
+ trees.h, compile with GEN_TREES_H and run "make test".
+- check return code of example in "make test" and display result
+- pass minigzip command line options to file_compress
+- simplifying code of inflateSync to avoid gcc 2.8 bug
+
+- support CC="gcc -Wall" in configure -s (QingLong)
+- avoid a flush caused by ftell in gzopen for write mode (Ken Raeburn)
+- fix test for shared library support to avoid compiler warnings
+- zlib.lib -> zlib.dll in msdos/zlib.rc (Gilles Vollant)
+- check for TARGET_OS_MAC in addition to MACOS (Brad Pettit)
+- do not use fdopen for Metrowerks on Mac (Brad Pettit))
+- add checks for gzputc and gzputc in example.c
+- avoid warnings in gzio.c and deflate.c (Andreas Kleinert)
+- use const for the CRC table (Ken Raeburn)
+- fixed "make uninstall" for shared libraries
+- use Tracev instead of Trace in infblock.c
+- in example.c use correct compressed length for test_sync
+- suppress +vnocompatwarnings in configure for HPUX (not always supported)
+
+Changes in 1.0.7 (20 Jan 1998)
+- fix gzseek which was broken in write mode
+- return error for gzseek to negative absolute position
+- fix configure for Linux (Chun-Chung Chen)
+- increase stack space for MSC (Tim Wegner)
+- get_crc_table and inflateSyncPoint are EXPORTed (Gilles Vollant)
+- define EXPORTVA for gzprintf (Gilles Vollant)
+- added man page zlib.3 (Rick Rodgers)
+- for contrib/untgz, fix makedir() and improve Makefile
+
+- check gzseek in write mode in example.c
+- allocate extra buffer for seeks only if gzseek is actually called
+- avoid signed/unsigned comparisons (Tim Wegner, Gilles Vollant)
+- add inflateSyncPoint in zconf.h
+- fix list of exported functions in nt/zlib.dnt and mdsos/zlib.def
+
+Changes in 1.0.6 (19 Jan 1998)
+- add functions gzprintf, gzputc, gzgetc, gztell, gzeof, gzseek, gzrewind and
+ gzsetparams (thanks to Roland Giersig and Kevin Ruland for some of this code)
+- Fix a deflate bug occuring only with compression level 0 (thanks to
+ Andy Buckler for finding this one).
+- In minigzip, pass transparently also the first byte for .Z files.
+- return Z_BUF_ERROR instead of Z_OK if output buffer full in uncompress()
+- check Z_FINISH in inflate (thanks to Marc Schluper)
+- Implement deflateCopy (thanks to Adam Costello)
+- make static libraries by default in configure, add --shared option.
+- move MSDOS or Windows specific files to directory msdos
+- suppress the notion of partial flush to simplify the interface
+ (but the symbol Z_PARTIAL_FLUSH is kept for compatibility with 1.0.4)
+- suppress history buffer provided by application to simplify the interface
+ (this feature was not implemented anyway in 1.0.4)
+- next_in and avail_in must be initialized before calling inflateInit or
+ inflateInit2
+- add EXPORT in all exported functions (for Windows DLL)
+- added Makefile.nt (thanks to Stephen Williams)
+- added the unsupported "contrib" directory:
+ contrib/asm386/ by Gilles Vollant <info@winimage.com>
+ 386 asm code replacing longest_match().
+ contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
+ A C++ I/O streams interface to the zlib gz* functions
+ contrib/iostream2/ by Tyge L�vset <Tyge.Lovset@cmr.no>
+ Another C++ I/O streams interface
+ contrib/untgz/ by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
+ A very simple tar.gz file extractor using zlib
+ contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
+ How to use compress(), uncompress() and the gz* functions from VB.
+- pass params -f (filtered data), -h (huffman only), -1 to -9 (compression
+ level) in minigzip (thanks to Tom Lane)
+
+- use const for rommable constants in deflate
+- added test for gzseek and gztell in example.c
+- add undocumented function inflateSyncPoint() (hack for Paul Mackerras)
+- add undocumented function zError to convert error code to string
+ (for Tim Smithers)
+- Allow compilation of gzio with -DNO_DEFLATE to avoid the compression code.
+- Use default memcpy for Symantec MSDOS compiler.
+- Add EXPORT keyword for check_func (needed for Windows DLL)
+- add current directory to LD_LIBRARY_PATH for "make test"
+- create also a link for libz.so.1
+- added support for FUJITSU UXP/DS (thanks to Toshiaki Nomura)
+- use $(SHAREDLIB) instead of libz.so in Makefile.in (for HPUX)
+- added -soname for Linux in configure (Chun-Chung Chen,
+- assign numbers to the exported functions in zlib.def (for Windows DLL)
+- add advice in zlib.h for best usage of deflateSetDictionary
+- work around compiler bug on Atari (cast Z_NULL in call of s->checkfn)
+- allow compilation with ANSI keywords only enabled for TurboC in large model
+- avoid "versionString"[0] (Borland bug)
+- add NEED_DUMMY_RETURN for Borland
+- use variable z_verbose for tracing in debug mode (L. Peter Deutsch).
+- allow compilation with CC
+- defined STDC for OS/2 (David Charlap)
+- limit external names to 8 chars for MVS (Thomas Lund)
+- in minigzip.c, use static buffers only for 16-bit systems
+- fix suffix check for "minigzip -d foo.gz"
+- do not return an error for the 2nd of two consecutive gzflush() (Felix Lee)
+- use _fdopen instead of fdopen for MSC >= 6.0 (Thomas Fanslau)
+- added makelcc.bat for lcc-win32 (Tom St Denis)
+- in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe)
+- Avoid expanded $Id: ChangeLog,v 1.1.1.1 2005/04/24 21:39:42 giles Exp $. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion.
+- check for unistd.h in configure (for off_t)
+- remove useless check parameter in inflate_blocks_free
+- avoid useless assignment of s->check to itself in inflate_blocks_new
+- do not flush twice in gzclose (thanks to Ken Raeburn)
+- rename FOPEN as F_OPEN to avoid clash with /usr/include/sys/file.h
+- use NO_ERRNO_H instead of enumeration of operating systems with errno.h
+- work around buggy fclose on pipes for HP/UX
+- support zlib DLL with BORLAND C++ 5.0 (thanks to Glenn Randers-Pehrson)
+- fix configure if CC is already equal to gcc
+
+Changes in 1.0.5 (3 Jan 98)
+- Fix inflate to terminate gracefully when fed corrupted or invalid data
+- Use const for rommable constants in inflate
+- Eliminate memory leaks on error conditions in inflate
+- Removed some vestigial code in inflate
+- Update web address in README
+
+Changes in 1.0.4 (24 Jul 96)
+- In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
+ bit, so the decompressor could decompress all the correct data but went
+ on to attempt decompressing extra garbage data. This affected minigzip too.
+- zlibVersion and gzerror return const char* (needed for DLL)
+- port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)
+- use z_error only for DEBUG (avoid problem with DLLs)
+
+Changes in 1.0.3 (2 Jul 96)
+- use z_streamp instead of z_stream *, which is now a far pointer in MSDOS
+ small and medium models; this makes the library incompatible with previous
+ versions for these models. (No effect in large model or on other systems.)
+- return OK instead of BUF_ERROR if previous deflate call returned with
+ avail_out as zero but there is nothing to do
+- added memcmp for non STDC compilers
+- define NO_DUMMY_DECL for more Mac compilers (.h files merged incorrectly)
+- define __32BIT__ if __386__ or i386 is defined (pb. with Watcom and SCO)
+- better check for 16-bit mode MSC (avoids problem with Symantec)
+
+Changes in 1.0.2 (23 May 96)
+- added Windows DLL support
+- added a function zlibVersion (for the DLL support)
+- fixed declarations using Bytef in infutil.c (pb with MSDOS medium model)
+- Bytef is define's instead of typedef'd only for Borland C
+- avoid reading uninitialized memory in example.c
+- mention in README that the zlib format is now RFC1950
+- updated Makefile.dj2
+- added algorithm.doc
+
+Changes in 1.0.1 (20 May 96) [1.0 skipped to avoid confusion]
+- fix array overlay in deflate.c which sometimes caused bad compressed data
+- fix inflate bug with empty stored block
+- fix MSDOS medium model which was broken in 0.99
+- fix deflateParams() which could generated bad compressed data.
+- Bytef is define'd instead of typedef'ed (work around Borland bug)
+- added an INDEX file
+- new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
+ Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
+- speed up adler32 for modern machines without auto-increment
+- added -ansi for IRIX in configure
+- static_init_done in trees.c is an int
+- define unlink as delete for VMS
+- fix configure for QNX
+- add configure branch for SCO and HPUX
+- avoid many warnings (unused variables, dead assignments, etc...)
+- no fdopen for BeOS
+- fix the Watcom fix for 32 bit mode (define FAR as empty)
+- removed redefinition of Byte for MKWERKS
+- work around an MWKERKS bug (incorrect merge of all .h files)
+
+Changes in 0.99 (27 Jan 96)
+- allow preset dictionary shared between compressor and decompressor
+- allow compression level 0 (no compression)
+- add deflateParams in zlib.h: allow dynamic change of compression level
+ and compression strategy.
+- test large buffers and deflateParams in example.c
+- add optional "configure" to build zlib as a shared library
+- suppress Makefile.qnx, use configure instead
+- fixed deflate for 64-bit systems (detected on Cray)
+- fixed inflate_blocks for 64-bit systems (detected on Alpha)
+- declare Z_DEFLATED in zlib.h (possible parameter for deflateInit2)
+- always return Z_BUF_ERROR when deflate() has nothing to do
+- deflateInit and inflateInit are now macros to allow version checking
+- prefix all global functions and types with z_ with -DZ_PREFIX
+- make falloc completely reentrant (inftrees.c)
+- fixed very unlikely race condition in ct_static_init
+- free in reverse order of allocation to help memory manager
+- use zlib-1.0/* instead of zlib/* inside the tar.gz
+- make zlib warning-free with "gcc -O3 -Wall -Wwrite-strings -Wpointer-arith
+ -Wconversion -Wstrict-prototypes -Wmissing-prototypes"
+- allow gzread on concatenated .gz files
+- deflateEnd now returns Z_DATA_ERROR if it was premature
+- deflate is finally (?) fully deterministic (no matches beyond end of input)
+- Document Z_SYNC_FLUSH
+- add uninstall in Makefile
+- Check for __cpluplus in zlib.h
+- Better test in ct_align for partial flush
+- avoid harmless warnings for Borland C++
+- initialize hash_head in deflate.c
+- avoid warning on fdopen (gzio.c) for HP cc -Aa
+- include stdlib.h for STDC compilers
+- include errno.h for Cray
+- ignore error if ranlib doesn't exist
+- call ranlib twice for NeXTSTEP
+- use exec_prefix instead of prefix for libz.a
+- renamed ct_* as _tr_* to avoid conflict with applications
+- clear z->msg in inflateInit2 before any error return
+- initialize opaque in example.c, gzio.c, deflate.c and inflate.c
+- fixed typo in zconf.h (_GNUC__ => __GNUC__)
+- check for WIN32 in zconf.h and zutil.c (avoid farmalloc in 32-bit mode)
+- fix typo in Make_vms.com (f$trnlnm -> f$getsyi)
+- in fcalloc, normalize pointer if size > 65520 bytes
+- don't use special fcalloc for 32 bit Borland C++
+- use STDC instead of __GO32__ to avoid redeclaring exit, calloc, etc...
+- use Z_BINARY instead of BINARY
+- document that gzclose after gzdopen will close the file
+- allow "a" as mode in gzopen.
+- fix error checking in gzread
+- allow skipping .gz extra-field on pipes
+- added reference to Perl interface in README
+- put the crc table in FAR data (I dislike more and more the medium model :)
+- added get_crc_table
+- added a dimension to all arrays (Borland C can't count).
+- workaround Borland C bug in declaration of inflate_codes_new & inflate_fast
+- guard against multiple inclusion of *.h (for precompiled header on Mac)
+- Watcom C pretends to be Microsoft C small model even in 32 bit mode.
+- don't use unsized arrays to avoid silly warnings by Visual C++:
+ warning C4746: 'inflate_mask' : unsized array treated as '__far'
+ (what's wrong with far data in far model?).
+- define enum out of inflate_blocks_state to allow compilation with C++
+
+Changes in 0.95 (16 Aug 95)
+- fix MSDOS small and medium model (now easier to adapt to any compiler)
+- inlined send_bits
+- fix the final (:-) bug for deflate with flush (output was correct but
+ not completely flushed in rare occasions).
+- default window size is same for compression and decompression
+ (it's now sufficient to set MAX_WBITS in zconf.h).
+- voidp -> voidpf and voidnp -> voidp (for consistency with other
+ typedefs and because voidnp was not near in large model).
+
+Changes in 0.94 (13 Aug 95)
+- support MSDOS medium model
+- fix deflate with flush (could sometimes generate bad output)
+- fix deflateReset (zlib header was incorrectly suppressed)
+- added support for VMS
+- allow a compression level in gzopen()
+- gzflush now calls fflush
+- For deflate with flush, flush even if no more input is provided.
+- rename libgz.a as libz.a
+- avoid complex expression in infcodes.c triggering Turbo C bug
+- work around a problem with gcc on Alpha (in INSERT_STRING)
+- don't use inline functions (problem with some gcc versions)
+- allow renaming of Byte, uInt, etc... with #define.
+- avoid warning about (unused) pointer before start of array in deflate.c
+- avoid various warnings in gzio.c, example.c, infblock.c, adler32.c, zutil.c
+- avoid reserved word 'new' in trees.c
+
+Changes in 0.93 (25 June 95)
+- temporarily disable inline functions
+- make deflate deterministic
+- give enough lookahead for PARTIAL_FLUSH
+- Set binary mode for stdin/stdout in minigzip.c for OS/2
+- don't even use signed char in inflate (not portable enough)
+- fix inflate memory leak for segmented architectures
+
+Changes in 0.92 (3 May 95)
+- don't assume that char is signed (problem on SGI)
+- Clear bit buffer when starting a stored block
+- no memcpy on Pyramid
+- suppressed inftest.c
+- optimized fill_window, put longest_match inline for gcc
+- optimized inflate on stored blocks.
+- untabify all sources to simplify patches
+
+Changes in 0.91 (2 May 95)
+- Default MEM_LEVEL is 8 (not 9 for Unix) as documented in zlib.h
+- Document the memory requirements in zconf.h
+- added "make install"
+- fix sync search logic in inflateSync
+- deflate(Z_FULL_FLUSH) now works even if output buffer too short
+- after inflateSync, don't scare people with just "lo world"
+- added support for DJGPP
+
+Changes in 0.9 (1 May 95)
+- don't assume that zalloc clears the allocated memory (the TurboC bug
+ was Mark's bug after all :)
+- let again gzread copy uncompressed data unchanged (was working in 0.71)
+- deflate(Z_FULL_FLUSH), inflateReset and inflateSync are now fully implemented
+- added a test of inflateSync in example.c
+- moved MAX_WBITS to zconf.h because users might want to change that.
+- document explicitly that zalloc(64K) on MSDOS must return a normalized
+ pointer (zero offset)
+- added Makefiles for Microsoft C, Turbo C, Borland C++
+- faster crc32()
+
+Changes in 0.8 (29 April 95)
+- added fast inflate (inffast.c)
+- deflate(Z_FINISH) now returns Z_STREAM_END when done. Warning: this
+ is incompatible with previous versions of zlib which returned Z_OK.
+- work around a TurboC compiler bug (bad code for b << 0, see infutil.h)
+ (actually that was not a compiler bug, see 0.81 above)
+- gzread no longer reads one extra byte in certain cases
+- In gzio destroy(), don't reference a freed structure
+- avoid many warnings for MSDOS
+- avoid the ERROR symbol which is used by MS Windows
+
+Changes in 0.71 (14 April 95)
+- Fixed more MSDOS compilation problems :( There is still a bug with
+ TurboC large model.
+
+Changes in 0.7 (14 April 95)
+- Added full inflate support.
+- Simplified the crc32() interface. The pre- and post-conditioning
+ (one's complement) is now done inside crc32(). WARNING: this is
+ incompatible with previous versions; see zlib.h for the new usage.
+
+Changes in 0.61 (12 April 95)
+- workaround for a bug in TurboC. example and minigzip now work on MSDOS.
+
+Changes in 0.6 (11 April 95)
+- added minigzip.c
+- added gzdopen to reopen a file descriptor as gzFile
+- added transparent reading of non-gziped files in gzread.
+- fixed bug in gzread (don't read crc as data)
+- fixed bug in destroy (gzio.c) (don't return Z_STREAM_END for gzclose).
+- don't allocate big arrays in the stack (for MSDOS)
+- fix some MSDOS compilation problems
+
+Changes in 0.5:
+- do real compression in deflate.c. Z_PARTIAL_FLUSH is supported but
+ not yet Z_FULL_FLUSH.
+- support decompression but only in a single step (forced Z_FINISH)
+- added opaque object for zalloc and zfree.
+- added deflateReset and inflateReset
+- added a variable zlib_version for consistency checking.
+- renamed the 'filter' parameter of deflateInit2 as 'strategy'.
+ Added Z_FILTERED and Z_HUFFMAN_ONLY constants.
+
+Changes in 0.4:
+- avoid "zip" everywhere, use zlib instead of ziplib.
+- suppress Z_BLOCK_FLUSH, interpret Z_PARTIAL_FLUSH as block flush
+ if compression method == 8.
+- added adler32 and crc32
+- renamed deflateOptions as deflateInit2, call one or the other but not both
+- added the method parameter for deflateInit2.
+- added inflateInit2
+- simplied considerably deflateInit and inflateInit by not supporting
+ user-provided history buffer. This is supported only in deflateInit2
+ and inflateInit2.
+
+Changes in 0.3:
+- prefix all macro names with Z_
+- use Z_FINISH instead of deflateEnd to finish compression.
+- added Z_HUFFMAN_ONLY
+- added gzerror()
--- /dev/null
+++ b/src/gfx/zlib/FAQ
@@ -1,0 +1,337 @@
+
+ Frequently Asked Questions about zlib
+
+
+If your question is not there, please check the zlib home page
+http://www.zlib.org which may have more recent information.
+The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
+
+
+ 1. Is zlib Y2K-compliant?
+
+ Yes. zlib doesn't handle dates.
+
+ 2. Where can I get a Windows DLL version?
+
+ The zlib sources can be compiled without change to produce a DLL.
+ See the file win32/DLL_FAQ.txt in the zlib distribution.
+ Pointers to the precompiled DLL are found in the zlib web site at
+ http://www.zlib.org.
+
+ 3. Where can I get a Visual Basic interface to zlib?
+
+ See
+ * http://www.dogma.net/markn/articles/zlibtool/zlibtool.htm
+ * contrib/visual-basic.txt in the zlib distribution
+ * win32/DLL_FAQ.txt in the zlib distribution
+
+ 4. compress() returns Z_BUF_ERROR.
+
+ Make sure that before the call of compress, the length of the compressed
+ buffer is equal to the total size of the compressed buffer and not
+ zero. For Visual Basic, check that this parameter is passed by reference
+ ("as any"), not by value ("as long").+
+ 5. deflate() or inflate() returns Z_BUF_ERROR.
+
+ Before making the call, make sure that avail_in and avail_out are not
+ zero. When setting the parameter flush equal to Z_FINISH, also make sure
+ that avail_out is big enough to allow processing all pending input.
+ Note that a Z_BUF_ERROR is not fatal--another call to deflate() or
+ inflate() can be made with more input or output space. A Z_BUF_ERROR
+ may in fact be unavoidable depending on how the functions are used, since
+ it is not possible to tell whether or not there is more output pending
+ when strm.avail_out returns with zero.
+
+ 6. Where's the zlib documentation (man pages, etc.)?
+
+ It's in zlib.h for the moment, and Francis S. Lin has converted it to a
+ web page zlib.html. Volunteers to transform this to Unix-style man pages,
+ please contact us (zlib@gzip.org). Examples of zlib usage are in the files
+ example.c and minigzip.c.
+
+ 7. Why don't you use GNU autoconf or libtool or ...?
+
+ Because we would like to keep zlib as a very small and simple
+ package. zlib is rather portable and doesn't need much configuration.
+
+ 8. I found a bug in zlib.
+
+ Most of the time, such problems are due to an incorrect usage of
+ zlib. Please try to reproduce the problem with a small program and send
+ the corresponding source to us at zlib@gzip.org . Do not send
+ multi-megabyte data files without prior agreement.
+
+ 9. Why do I get "undefined reference to gzputc"?
+
+ If "make test" produces something like
+
+ example.o(.text+0x154): undefined reference to `gzputc'
+
+ check that you don't have old files libz.* in /usr/lib, /usr/local/lib or
+ /usr/X11R6/lib. Remove any old versions, then do "make install".
+
+10. I need a Delphi interface to zlib.
+
+ See the contrib/delphi directory in the zlib distribution.
+
+11. Can zlib handle .zip archives?
+
+ Not by itself, no. See the directory contrib/minizip in the zlib
+ distribution.
+
+12. Can zlib handle .Z files?
+
+ No, sorry. You have to spawn an uncompress or gunzip subprocess, or adapt
+ the code of uncompress on your own.
+
+13. How can I make a Unix shared library?
+
+ make clean
+ ./configure -s
+ make
+
+14. How do I install a shared zlib library on Unix?
+
+ After the above, then:
+
+ make install
+
+ However, many flavors of Unix come with a shared zlib already installed.
+ Before going to the trouble of compiling a shared version of zlib and
+ trying to install it, you may want to check if it's already there! If you
+ can #include <zlib.h>, it's there. The -lz option will probably link to it.
+
+15. I have a question about OttoPDF.
+
+ We are not the authors of OttoPDF. The real author is on the OttoPDF web
+ site: Joel Hainley, jhainley@myndkryme.com.
+
+16. Can zlib decode Flate data in an Adobe PDF file?
+
+ Yes. See http://www.fastio.com/ (ClibPDF), or http://www.pdflib.com/ .
+ To modify PDF forms, see http://sourceforge.net/projects/acroformtool/ .
+
+17. Why am I getting this "register_frame_info not found" error on Solaris?
+
+ After installing zlib 1.1.4 on Solaris 2.6, running applications using zlib
+ generates an error such as:
+
+ ld.so.1: rpm: fatal: relocation error: file /usr/local/lib/libz.so:
+ symbol __register_frame_info: referenced symbol not found
+
+ The symbol __register_frame_info is not part of zlib, it is generated by
+ the C compiler (cc or gcc). You must recompile applications using zlib
+ which have this problem. This problem is specific to Solaris. See
+ http://www.sunfreeware.com for Solaris versions of zlib and applications
+ using zlib.
+
+18. Why does gzip give an error on a file I make with compress/deflate?
+
+ The compress and deflate functions produce data in the zlib format, which
+ is different and incompatible with the gzip format. The gz* functions in
+ zlib on the other hand use the gzip format. Both the zlib and gzip
+ formats use the same compressed data format internally, but have different
+ headers and trailers around the compressed data.
+
+19. Ok, so why are there two different formats?
+
+ The gzip format was designed to retain the directory information about
+ a single file, such as the name and last modification date. The zlib
+ format on the other hand was designed for in-memory and communication
+ channel applications, and has a much more compact header and trailer and
+ uses a faster integrity check than gzip.
+
+20. Well that's nice, but how do I make a gzip file in memory?
+
+ You can request that deflate write the gzip format instead of the zlib
+ format using deflateInit2(). You can also request that inflate decode
+ the gzip format using inflateInit2(). Read zlib.h for more details.
+
+ Note that you cannot specify special gzip header contents (e.g. a file
+ name or modification date), nor will inflate tell you what was in the
+ gzip header. If you need to customize the header or see what's in it,
+ you can use the raw deflate and inflate operations and the crc32()
+ function and roll your own gzip encoding and decoding. Read the gzip
+ RFC 1952 for details of the header and trailer format.
+
+21. Is zlib thread-safe?
+
+ Yes. However any library routines that zlib uses and any application-
+ provided memory allocation routines must also be thread-safe. zlib's gz*
+ functions use stdio library routines, and most of zlib's functions use the
+ library memory allocation routines by default. zlib's Init functions allow
+ for the application to provide custom memory allocation routines.
+
+ Of course, you should only operate on any given zlib or gzip stream from a
+ single thread at a time.
+
+22. Can I use zlib in my commercial application?
+
+ Yes. Please read the license in zlib.h.
+
+23. Is zlib under the GNU license?
+
+ No. Please read the license in zlib.h.
+
+24. The license says that altered source versions must be "plainly marked". So
+ what exactly do I need to do to meet that requirement?
+
+ You need to change the ZLIB_VERSION and ZLIB_VERNUM #defines in zlib.h. In
+ particular, the final version number needs to be changed to "f", and an
+ identification string should be appended to ZLIB_VERSION. Version numbers
+ x.x.x.f are reserved for modifications to zlib by others than the zlib
+ maintainers. For example, if the version of the base zlib you are altering
+ is "1.2.3.4", then in zlib.h you should change ZLIB_VERNUM to 0x123f, and
+ ZLIB_VERSION to something like "1.2.3.f-zachary-mods-v3". You can also
+ update the version strings in deflate.c and inftrees.c.
+
+ For altered source distributions, you should also note the origin and
+ nature of the changes in zlib.h, as well as in ChangeLog and README, along
+ with the dates of the alterations. The origin should include at least your
+ name (or your company's name), and an email address to contact for help or
+ issues with the library.
+
+ Note that distributing a compiled zlib library along with zlib.h and
+ zconf.h is also a source distribution, and so you should change
+ ZLIB_VERSION and ZLIB_VERNUM and note the origin and nature of the changes
+ in zlib.h as you would for a full source distribution.
+
+25. Will zlib work on a big-endian or little-endian architecture, and can I
+ exchange compressed data between them?
+
+ Yes and yes.
+
+26. Will zlib work on a 64-bit machine?
+
+ It should. It has been tested on 64-bit machines, and has no dependence
+ on any data types being limited to 32-bits in length. If you have any
+ difficulties, please provide a complete problem report to zlib@gzip.org
+
+27. Will zlib decompress data from the PKWare Data Compression Library?
+
+ No. The PKWare DCL uses a completely different compressed data format
+ than does PKZIP and zlib. However, you can look in zlib's contrib/blast
+ directory for a possible solution to your problem.
+
+28. Can I access data randomly in a compressed stream?
+
+ No, not without some preparation. If when compressing you periodically
+ use Z_FULL_FLUSH, carefully write all the pending data at those points,
+ and keep an index of those locations, then you can start decompression
+ at those points. You have to be careful to not use Z_FULL_FLUSH too
+ often, since it can significantly degrade compression.
+
+29. Does zlib work on MVS, OS/390, CICS, etc.?
+
+ We don't know for sure. We have heard occasional reports of success on
+ these systems. If you do use it on one of these, please provide us with
+ a report, instructions, and patches that we can reference when we get
+ these questions. Thanks.
+
+30. Is there some simpler, easier to read version of inflate I can look at
+ to understand the deflate format?
+
+ First off, you should read RFC 1951. Second, yes. Look in zlib's
+ contrib/puff directory.
+
+31. Does zlib infringe on any patents?
+
+ As far as we know, no. In fact, that was originally the whole point behind
+ zlib. Look here for some more information:
+
+ http://www.gzip.org/#faq11
+
+32. Can zlib work with greater than 4 GB of data?
+
+ Yes. inflate() and deflate() will process any amount of data correctly.
+ Each call of inflate() or deflate() is limited to input and output chunks
+ of the maximum value that can be stored in the compiler's "unsigned int"
+ type, but there is no limit to the number of chunks. Note however that the
+ strm.total_in and strm_total_out counters may be limited to 4 GB. These
+ counters are provided as a convenience and are not used internally by
+ inflate() or deflate(). The application can easily set up its own counters
+ updated after each call of inflate() or deflate() to count beyond 4 GB.
+ compress() and uncompress() may be limited to 4 GB, since they operate in a
+ single call. gzseek() and gztell() may be limited to 4 GB depending on how
+ zlib is compiled. See the zlibCompileFlags() function in zlib.h.
+
+ The word "may" appears several times above since there is a 4 GB limit
+ only if the compiler's "long" type is 32 bits. If the compiler's "long"
+ type is 64 bits, then the limit is 16 exabytes.
+
+33. Does zlib have any security vulnerabilities?
+
+ The only one that we are aware of is potentially in gzprintf(). If zlib
+ is compiled to use sprintf() or vsprintf(), then there is no protection
+ against a buffer overflow of a 4K string space, other than the caller of
+ gzprintf() assuring that the output will not exceed 4K. On the other
+ hand, if zlib is compiled to use snprintf() or vsnprintf(), which should
+ normally be the case, then there is no vulnerability. The ./configure
+ script will display warnings if an insecure variation of sprintf() will
+ be used by gzprintf(). Also the zlibCompileFlags() function will return
+ information on what variant of sprintf() is used by gzprintf().
+
+ If you don't have snprintf() or vsnprintf() and would like one, you can
+ find a portable implementation here:
+
+ http://www.ijs.si/software/snprintf/
+
+ Note that you should be using the most recent version of zlib. Versions
+ 1.1.3 and before were subject to a double-free vulnerability.
+
+34. Is there a Java version of zlib?
+
+ Probably what you want is to use zlib in Java. zlib is already included
+ as part of the Java SDK in the java.util.zip package. If you really want
+ a version of zlib written in the Java language, look on the zlib home
+ page for links: http://www.zlib.org/
+
+35. I get this or that compiler or source-code scanner warning when I crank it
+ up to maximally-pedantic. Can't you guys write proper code?
+
+ Many years ago, we gave up attempting to avoid warnings on every compiler
+ in the universe. It just got to be a waste of time, and some compilers
+ were downright silly. So now, we simply make sure that the code always
+ works.
+
+36. Will zlib read the (insert any ancient or arcane format here) compressed
+ data format?
+
+ Probably not. Look in the comp.compression FAQ for pointers to various
+ formats and associated software.
+
+37. How can I encrypt/decrypt zip files with zlib?
+
+ zlib doesn't support encryption. The original PKZIP encryption is very weak
+ and can be broken with freely available programs. To get strong encryption,
+ use GnuPG, http://www.gnupg.org/ , which already includes zlib compression.
+ For PKZIP compatible "encryption", look at http://www.info-zip.org/
+
+38. What's the difference between the "gzip" and "deflate" HTTP 1.1 encodings?
+
+ "gzip" is the gzip format, and "deflate" is the zlib format. They should
+ probably have called the second one "zlib" instead to avoid confusion
+ with the raw deflate compressed data format. While the HTTP 1.1 RFC 2616
+ correctly points to the zlib specification in RFC 1950 for the "deflate"
+ transfer encoding, there have been reports of servers and browsers that
+ incorrectly produce or expect raw deflate data per the deflate
+ specficiation in RFC 1951, most notably Microsoft. So even though the
+ "deflate" transfer encoding using the zlib format would be the more
+ efficient approach (and in fact exactly what the zlib format was designed
+ for), using the "gzip" transfer encoding is probably more reliable due to
+ an unfortunate choice of name on the part of the HTTP 1.1 authors.
+
+ Bottom line: use the gzip format for HTTP 1.1 encoding.
+
+39. Does zlib support the new "Deflate64" format introduced by PKWare?
+
+ No. PKWare has apparently decided to keep that format proprietary, since
+ they have not documented it as they have previous compression formats.
+ In any case, the compression improvements are so modest compared to other
+ more modern approaches, that it's not worth the effort to implement.
+
+40. Can you please sign these lengthy legal documents and fax them back to us
+ so that we can use your software in our product?
+
+ No. Go away. Shoo.
--- /dev/null
+++ b/src/gfx/zlib/INDEX
@@ -1,0 +1,51 @@
+ChangeLog history of changes
+FAQ Frequently Asked Questions about zlib
+INDEX this file
+Makefile makefile for Unix (generated by configure)
+Makefile.in makefile for Unix (template for configure)
+README guess what
+algorithm.txt description of the (de)compression algorithm
+configure configure script for Unix
+zconf.in.h template for zconf.h (used by configure)
+
+amiga/ makefiles for Amiga SAS C
+as400/ makefiles for IBM AS/400
+msdos/ makefiles for MSDOS
+old/ makefiles for various architectures and zlib documentation
+ files that have not yet been updated for zlib 1.2.x
+projects/ projects for various Integrated Development Environments
+qnx/ makefiles for QNX
+win32/ makefiles for Windows
+
+ zlib public header files (must be kept):
+zconf.h
+zlib.h
+
+ private source files used to build the zlib library:
+adler32.c
+compress.c
+crc32.c
+crc32.h
+deflate.c
+deflate.h
+gzio.c
+infback.c
+inffast.c
+inffast.h
+inffixed.h
+inflate.c
+inflate.h
+inftrees.c
+inftrees.h
+trees.c
+trees.h
+uncompr.c
+zutil.c
+zutil.h
+
+ source files for sample programs:
+example.c
+minigzip.c
+
+ unsupported contribution by third parties
+See contrib/README.contrib
--- /dev/null
+++ b/src/gfx/zlib/Makefile
@@ -1,0 +1,154 @@
+# Makefile for zlib
+# Copyright (C) 1995-2003 Jean-loup Gailly.
+# For conditions of distribution and use, see copyright notice in zlib.h
+
+# To compile and test, type:
+# ./configure; make test
+# The call of configure is optional if you don't have special requirements
+# If you wish to build zlib as a shared library, use: ./configure -s
+
+# To use the asm code, type:
+# cp contrib/asm?86/match.S ./match.S
+# make LOC=-DASMV OBJA=match.o
+
+# To install /usr/local/lib/libz.* and /usr/local/include/zlib.h, type:
+# make install
+# To install in $HOME instead of /usr/local, use:
+# make install prefix=$HOME
+
+CC=cc
+
+CFLAGS=-O
+#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
+#CFLAGS=-g -DDEBUG
+#CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+# -Wstrict-prototypes -Wmissing-prototypes
+
+LDFLAGS=libz.a
+LDSHARED=$(CC)
+CPP=$(CC) -E
+
+LIBS=libz.a
+SHAREDLIB=libz.so
+SHAREDLIBV=libz.so.1.2.2
+SHAREDLIBM=libz.so.1
+
+AR=ar rc
+RANLIB=ranlib
+TAR=tar
+SHELL=/bin/sh
+EXE=
+
+prefix = /usr/local
+exec_prefix = ${prefix}+libdir = ${exec_prefix}/lib+includedir = ${prefix}/include+mandir = ${prefix}/share/man+man3dir = ${mandir}/man3+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+ zutil.o inflate.o infback.o inftrees.o inffast.o
+
+OBJA =
+# to use the asm code: make OBJA=match.o
+
+TEST_OBJS = example.o minigzip.o
+
+all: example$(EXE) minigzip$(EXE)
+
+check: test
+test: all
+ @LD_LIBRARY_PATH=.:$(LD_LIBRARY_PATH) ; export LD_LIBRARY_PATH; \
+ echo hello world | ./minigzip | ./minigzip -d || \
+ echo ' *** minigzip test FAILED ***' ; \
+ if ./example; then \
+ echo ' *** zlib test OK ***'; \
+ else \
+ echo ' *** zlib test FAILED ***'; \
+ fi
+
+libz.a: $(OBJS) $(OBJA)
+ $(AR) $@ $(OBJS) $(OBJA)
+ -@ ($(RANLIB) $@ || true) >/dev/null 2>&1
+
+match.o: match.S
+ $(CPP) match.S > _match.s
+ $(CC) -c _match.s
+ mv _match.o match.o
+ rm -f _match.s
+
+$(SHAREDLIBV): $(OBJS)
+ $(LDSHARED) -o $@ $(OBJS)
+ rm -f $(SHAREDLIB) $(SHAREDLIBM)
+ ln -s $@ $(SHAREDLIB)
+ ln -s $@ $(SHAREDLIBM)
+
+example$(EXE): example.o $(LIBS)
+ $(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS)
+
+minigzip$(EXE): minigzip.o $(LIBS)
+ $(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
+
+install: $(LIBS)
+ -@if [ ! -d $(exec_prefix) ]; then mkdir -p $(exec_prefix); fi
+ -@if [ ! -d $(includedir) ]; then mkdir -p $(includedir); fi
+ -@if [ ! -d $(libdir) ]; then mkdir -p $(libdir); fi
+ -@if [ ! -d $(man3dir) ]; then mkdir -p $(man3dir); fi
+ cp zlib.h zconf.h $(includedir)
+ chmod 644 $(includedir)/zlib.h $(includedir)/zconf.h
+ cp $(LIBS) $(libdir)
+ cd $(libdir); chmod 755 $(LIBS)
+ -@(cd $(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
+ cd $(libdir); if test -f $(SHAREDLIBV); then \
+ rm -f $(SHAREDLIB) $(SHAREDLIBM); \
+ ln -s $(SHAREDLIBV) $(SHAREDLIB); \
+ ln -s $(SHAREDLIBV) $(SHAREDLIBM); \
+ (ldconfig || true) >/dev/null 2>&1; \
+ fi
+ cp zlib.3 $(man3dir)
+ chmod 644 $(man3dir)/zlib.3
+# The ranlib in install is needed on NeXTSTEP which checks file times
+# ldconfig is for Linux
+
+uninstall:
+ cd $(includedir); \
+ cd $(libdir); rm -f libz.a; \
+ if test -f $(SHAREDLIBV); then \
+ rm -f $(SHAREDLIBV) $(SHAREDLIB) $(SHAREDLIBM); \
+ fi
+ cd $(man3dir); rm -f zlib.3
+
+mostlyclean: clean
+clean:
+ rm -f *.o *~ example$(EXE) minigzip$(EXE) \
+ libz.* foo.gz so_locations \
+ _match.s maketree contrib/infback9/*.o
+
+maintainer-clean: distclean
+distclean: clean
+ cp -p Makefile.in Makefile
+ cp -p zconf.in.h zconf.h
+ rm -f .DS_Store
+
+tags:
+ etags *.[ch]
+
+depend:
+ makedepend -- $(CFLAGS) -- *.[ch]
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+adler32.o: zlib.h zconf.h
+compress.o: zlib.h zconf.h
+crc32.o: crc32.h zlib.h zconf.h
+deflate.o: deflate.h zutil.h zlib.h zconf.h
+example.o: zlib.h zconf.h
+gzio.o: zutil.h zlib.h zconf.h
+inffast.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+inflate.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+infback.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+inftrees.o: zutil.h zlib.h zconf.h inftrees.h
+minigzip.o: zlib.h zconf.h
+trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
+uncompr.o: zlib.h zconf.h
+zutil.o: zutil.h zlib.h zconf.h
--- /dev/null
+++ b/src/gfx/zlib/Makefile.in
@@ -1,0 +1,154 @@
+# Makefile for zlib
+# Copyright (C) 1995-2003 Jean-loup Gailly.
+# For conditions of distribution and use, see copyright notice in zlib.h
+
+# To compile and test, type:
+# ./configure; make test
+# The call of configure is optional if you don't have special requirements
+# If you wish to build zlib as a shared library, use: ./configure -s
+
+# To use the asm code, type:
+# cp contrib/asm?86/match.S ./match.S
+# make LOC=-DASMV OBJA=match.o
+
+# To install /usr/local/lib/libz.* and /usr/local/include/zlib.h, type:
+# make install
+# To install in $HOME instead of /usr/local, use:
+# make install prefix=$HOME
+
+CC=cc
+
+CFLAGS=-O
+#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
+#CFLAGS=-g -DDEBUG
+#CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+# -Wstrict-prototypes -Wmissing-prototypes
+
+LDFLAGS=libz.a
+LDSHARED=$(CC)
+CPP=$(CC) -E
+
+LIBS=libz.a
+SHAREDLIB=libz.so
+SHAREDLIBV=libz.so.1.2.2
+SHAREDLIBM=libz.so.1
+
+AR=ar rc
+RANLIB=ranlib
+TAR=tar
+SHELL=/bin/sh
+EXE=
+
+prefix = /usr/local
+exec_prefix = ${prefix}+libdir = ${exec_prefix}/lib+includedir = ${prefix}/include+mandir = ${prefix}/share/man+man3dir = ${mandir}/man3+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+ zutil.o inflate.o infback.o inftrees.o inffast.o
+
+OBJA =
+# to use the asm code: make OBJA=match.o
+
+TEST_OBJS = example.o minigzip.o
+
+all: example$(EXE) minigzip$(EXE)
+
+check: test
+test: all
+ @LD_LIBRARY_PATH=.:$(LD_LIBRARY_PATH) ; export LD_LIBRARY_PATH; \
+ echo hello world | ./minigzip | ./minigzip -d || \
+ echo ' *** minigzip test FAILED ***' ; \
+ if ./example; then \
+ echo ' *** zlib test OK ***'; \
+ else \
+ echo ' *** zlib test FAILED ***'; \
+ fi
+
+libz.a: $(OBJS) $(OBJA)
+ $(AR) $@ $(OBJS) $(OBJA)
+ -@ ($(RANLIB) $@ || true) >/dev/null 2>&1
+
+match.o: match.S
+ $(CPP) match.S > _match.s
+ $(CC) -c _match.s
+ mv _match.o match.o
+ rm -f _match.s
+
+$(SHAREDLIBV): $(OBJS)
+ $(LDSHARED) -o $@ $(OBJS)
+ rm -f $(SHAREDLIB) $(SHAREDLIBM)
+ ln -s $@ $(SHAREDLIB)
+ ln -s $@ $(SHAREDLIBM)
+
+example$(EXE): example.o $(LIBS)
+ $(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS)
+
+minigzip$(EXE): minigzip.o $(LIBS)
+ $(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
+
+install: $(LIBS)
+ -@if [ ! -d $(exec_prefix) ]; then mkdir -p $(exec_prefix); fi
+ -@if [ ! -d $(includedir) ]; then mkdir -p $(includedir); fi
+ -@if [ ! -d $(libdir) ]; then mkdir -p $(libdir); fi
+ -@if [ ! -d $(man3dir) ]; then mkdir -p $(man3dir); fi
+ cp zlib.h zconf.h $(includedir)
+ chmod 644 $(includedir)/zlib.h $(includedir)/zconf.h
+ cp $(LIBS) $(libdir)
+ cd $(libdir); chmod 755 $(LIBS)
+ -@(cd $(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
+ cd $(libdir); if test -f $(SHAREDLIBV); then \
+ rm -f $(SHAREDLIB) $(SHAREDLIBM); \
+ ln -s $(SHAREDLIBV) $(SHAREDLIB); \
+ ln -s $(SHAREDLIBV) $(SHAREDLIBM); \
+ (ldconfig || true) >/dev/null 2>&1; \
+ fi
+ cp zlib.3 $(man3dir)
+ chmod 644 $(man3dir)/zlib.3
+# The ranlib in install is needed on NeXTSTEP which checks file times
+# ldconfig is for Linux
+
+uninstall:
+ cd $(includedir); \
+ cd $(libdir); rm -f libz.a; \
+ if test -f $(SHAREDLIBV); then \
+ rm -f $(SHAREDLIBV) $(SHAREDLIB) $(SHAREDLIBM); \
+ fi
+ cd $(man3dir); rm -f zlib.3
+
+mostlyclean: clean
+clean:
+ rm -f *.o *~ example$(EXE) minigzip$(EXE) \
+ libz.* foo.gz so_locations \
+ _match.s maketree contrib/infback9/*.o
+
+maintainer-clean: distclean
+distclean: clean
+ cp -p Makefile.in Makefile
+ cp -p zconf.in.h zconf.h
+ rm -f .DS_Store
+
+tags:
+ etags *.[ch]
+
+depend:
+ makedepend -- $(CFLAGS) -- *.[ch]
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+adler32.o: zlib.h zconf.h
+compress.o: zlib.h zconf.h
+crc32.o: crc32.h zlib.h zconf.h
+deflate.o: deflate.h zutil.h zlib.h zconf.h
+example.o: zlib.h zconf.h
+gzio.o: zutil.h zlib.h zconf.h
+inffast.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+inflate.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+infback.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+inftrees.o: zutil.h zlib.h zconf.h inftrees.h
+minigzip.o: zlib.h zconf.h
+trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
+uncompr.o: zlib.h zconf.h
+zutil.o: zutil.h zlib.h zconf.h
--- /dev/null
+++ b/src/gfx/zlib/README
@@ -1,0 +1,126 @@
+ZLIB DATA COMPRESSION LIBRARY
+
+zlib 1.2.2 is a general purpose data compression library. All the code is
+thread safe. The data format used by the zlib library is described by RFCs
+(Request for Comments) 1950 to 1952 in the files
+http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
+and rfc1952.txt (gzip format). These documents are also available in other
+formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
+
+All functions of the compression library are documented in the file zlib.h
+(volunteer to write man pages welcome, contact zlib@gzip.org). A usage example
+of the library is given in the file example.c which also tests that the library
+is working correctly. Another example is given in the file minigzip.c. The
+compression library itself is composed of all source files except example.c and
+minigzip.c.
+
+To compile all files and run the test program, follow the instructions given at
+the top of Makefile. In short "make test; make install" should work for most
+machines. For Unix: "./configure; make test; make install" For MSDOS, use one
+of the special makefiles such as Makefile.msc. For VMS, use Make_vms.com or
+descrip.mms.
+
+Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant
+<info@winimage.com> for the Windows DLL version. The zlib home page is
+http://www.zlib.org or http://www.gzip.org/zlib/ Before reporting a problem,
+please check this site to verify that you have the latest version of zlib;
+otherwise get the latest version and check whether the problem still exists or
+not.
+
+PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html before asking
+for help.
+
+Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
+issue of Dr. Dobb's Journal; a copy of the article is available in
+http://dogma.net/markn/articles/zlibtool/zlibtool.htm
+
+The changes made in version 1.2.2 are documented in the file ChangeLog.
+
+Unsupported third party contributions are provided in directory "contrib".
+
+A Java implementation of zlib is available in the Java Development Kit
+http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/package-summary.html
+See the zlib home page http://www.zlib.org for details.
+
+A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is in the
+CPAN (Comprehensive Perl Archive Network) sites
+http://www.cpan.org/modules/by-module/Compress/
+
+A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is
+available in Python 1.5 and later versions, see
+http://www.python.org/doc/lib/module-zlib.html
+
+A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com> is
+availlable at http://www.oche.de/~akupries/soft/trf/trf_zip.html
+
+An experimental package to read and write files in .zip format, written on top
+of zlib by Gilles Vollant <info@winimage.com>, is available in the
+contrib/minizip directory of zlib.
+
+
+Notes for some targets:
+
+- For Windows DLL versions, please see win32/DLL_FAQ.txt
+
+- For 64-bit Irix, deflate.c must be compiled without any optimization. With
+ -O, one libpng test fails. The test works in 32 bit mode (with the -n32
+ compiler flag). The compiler bug has been reported to SGI.
+
+- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works
+ when compiled with cc.
+
+- On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is
+ necessary to get gzprintf working correctly. This is done by configure.
+
+- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with
+ other compilers. Use "make test" to check your compiler.
+
+- gzdopen is not supported on RISCOS, BEOS and by some Mac compilers.
+
+- For PalmOs, see http://palmzlib.sourceforge.net/
+
+- When building a shared, i.e. dynamic library on Mac OS X, the library must be
+ installed before testing (do "make install" before "make test"), since the
+ library location is specified in the library.
+
+
+Acknowledgments:
+
+ The deflate format used by zlib was defined by Phil Katz. The deflate
+ and zlib specifications were written by L. Peter Deutsch. Thanks to all the
+ people who reported problems and suggested various improvements in zlib;
+ they are too numerous to cite here.
+
+Copyright notice:
+
+ (C) 1995-2004 Jean-loup Gailly and Mark Adler
+
+ This software is provided 'as-is', without any express or implied
+ warranty. In no event will the authors be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+
+ Jean-loup Gailly Mark Adler
+ jloup@gzip.org madler@alumni.caltech.edu
+
+If you use the zlib library in a product, we would appreciate *not*
+receiving lengthy legal documents to sign. The sources are provided
+for free but without warranty of any kind. The library has been
+entirely written by Jean-loup Gailly and Mark Adler; it does not
+include third-party code.
+
+If you redistribute modified sources, we would appreciate that you include
+in the file ChangeLog history information documenting your changes. Please
+read the FAQ for more information on the distribution of modified source
+versions.
--- /dev/null
+++ b/src/gfx/zlib/adler32.c
@@ -1,0 +1,74 @@
+/* adler32.c -- compute the Adler-32 checksum of a data stream
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id: adler32.c,v 1.1.1.1 2005/04/24 21:39:38 giles Exp $ */
+
+#define ZLIB_INTERNAL
+#include "zlib.h"
+
+#define BASE 65521UL /* largest prime smaller than 65536 */
+#define NMAX 5552
+/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
+
+#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}+#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
+#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
+#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
+#define DO16(buf) DO8(buf,0); DO8(buf,8);
+
+#ifdef NO_DIVIDE
+# define MOD(a) \
+ do { \+ if (a >= (BASE << 16)) a -= (BASE << 16); \
+ if (a >= (BASE << 15)) a -= (BASE << 15); \
+ if (a >= (BASE << 14)) a -= (BASE << 14); \
+ if (a >= (BASE << 13)) a -= (BASE << 13); \
+ if (a >= (BASE << 12)) a -= (BASE << 12); \
+ if (a >= (BASE << 11)) a -= (BASE << 11); \
+ if (a >= (BASE << 10)) a -= (BASE << 10); \
+ if (a >= (BASE << 9)) a -= (BASE << 9); \
+ if (a >= (BASE << 8)) a -= (BASE << 8); \
+ if (a >= (BASE << 7)) a -= (BASE << 7); \
+ if (a >= (BASE << 6)) a -= (BASE << 6); \
+ if (a >= (BASE << 5)) a -= (BASE << 5); \
+ if (a >= (BASE << 4)) a -= (BASE << 4); \
+ if (a >= (BASE << 3)) a -= (BASE << 3); \
+ if (a >= (BASE << 2)) a -= (BASE << 2); \
+ if (a >= (BASE << 1)) a -= (BASE << 1); \
+ if (a >= BASE) a -= BASE; \
+ } while (0)
+#else
+# define MOD(a) a %= BASE
+#endif
+
+/* ========================================================================= */
+uLong ZEXPORT adler32(adler, buf, len)
+ uLong adler;
+ const Bytef *buf;
+ uInt len;
+{+ unsigned long s1 = adler & 0xffff;
+ unsigned long s2 = (adler >> 16) & 0xffff;
+ int k;
+
+ if (buf == Z_NULL) return 1L;
+
+ while (len > 0) {+ k = len < NMAX ? (int)len : NMAX;
+ len -= k;
+ while (k >= 16) {+ DO16(buf);
+ buf += 16;
+ k -= 16;
+ }
+ if (k != 0) do {+ s1 += *buf++;
+ s2 += s1;
+ } while (--k);
+ MOD(s1);
+ MOD(s2);
+ }
+ return (s2 << 16) | s1;
+}
--- /dev/null
+++ b/src/gfx/zlib/algorithm.txt
@@ -1,0 +1,209 @@
+1. Compression algorithm (deflate)
+
+The deflation algorithm used by gzip (also zip and zlib) is a variation of
+LZ77 (Lempel-Ziv 1977, see reference below). It finds duplicated strings in
+the input data. The second occurrence of a string is replaced by a
+pointer to the previous string, in the form of a pair (distance,
+length). Distances are limited to 32K bytes, and lengths are limited
+to 258 bytes. When a string does not occur anywhere in the previous
+32K bytes, it is emitted as a sequence of literal bytes. (In this
+description, `string' must be taken as an arbitrary sequence of bytes,
+and is not restricted to printable characters.)
+
+Literals or match lengths are compressed with one Huffman tree, and
+match distances are compressed with another tree. The trees are stored
+in a compact form at the start of each block. The blocks can have any
+size (except that the compressed data for one block must fit in
+available memory). A block is terminated when deflate() determines that
+it would be useful to start another block with fresh trees. (This is
+somewhat similar to the behavior of LZW-based _compress_.)
+
+Duplicated strings are found using a hash table. All input strings of
+length 3 are inserted in the hash table. A hash index is computed for
+the next 3 bytes. If the hash chain for this index is not empty, all
+strings in the chain are compared with the current input string, and
+the longest match is selected.
+
+The hash chains are searched starting with the most recent strings, to
+favor small distances and thus take advantage of the Huffman encoding.
+The hash chains are singly linked. There are no deletions from the
+hash chains, the algorithm simply discards matches that are too old.
+
+To avoid a worst-case situation, very long hash chains are arbitrarily
+truncated at a certain length, determined by a runtime option (level
+parameter of deflateInit). So deflate() does not always find the longest
+possible match but generally finds a match which is long enough.
+
+deflate() also defers the selection of matches with a lazy evaluation
+mechanism. After a match of length N has been found, deflate() searches for
+a longer match at the next input byte. If a longer match is found, the
+previous match is truncated to a length of one (thus producing a single
+literal byte) and the process of lazy evaluation begins again. Otherwise,
+the original match is kept, and the next match search is attempted only N
+steps later.
+
+The lazy match evaluation is also subject to a runtime parameter. If
+the current match is long enough, deflate() reduces the search for a longer
+match, thus speeding up the whole process. If compression ratio is more
+important than speed, deflate() attempts a complete second search even if
+the first match is already long enough.
+
+The lazy match evaluation is not performed for the fastest compression
+modes (level parameter 1 to 3). For these fast modes, new strings
+are inserted in the hash table only when no match was found, or
+when the match is not too long. This degrades the compression ratio
+but saves time since there are both fewer insertions and fewer searches.
+
+
+2. Decompression algorithm (inflate)
+
+2.1 Introduction
+
+The key question is how to represent a Huffman code (or any prefix code) so
+that you can decode fast. The most important characteristic is that shorter
+codes are much more common than longer codes, so pay attention to decoding the
+short codes fast, and let the long codes take longer to decode.
+
+inflate() sets up a first level table that covers some number of bits of
+input less than the length of longest code. It gets that many bits from the
+stream, and looks it up in the table. The table will tell if the next
+code is that many bits or less and how many, and if it is, it will tell
+the value, else it will point to the next level table for which inflate()
+grabs more bits and tries to decode a longer code.
+
+How many bits to make the first lookup is a tradeoff between the time it
+takes to decode and the time it takes to build the table. If building the
+table took no time (and if you had infinite memory), then there would only
+be a first level table to cover all the way to the longest code. However,
+building the table ends up taking a lot longer for more bits since short
+codes are replicated many times in such a table. What inflate() does is
+simply to make the number of bits in the first table a variable, and then
+to set that variable for the maximum speed.
+
+For inflate, which has 286 possible codes for the literal/length tree, the size
+of the first table is nine bits. Also the distance trees have 30 possible
+values, and the size of the first table is six bits. Note that for each of
+those cases, the table ended up one bit longer than the ``average'' code
+length, i.e. the code length of an approximately flat code which would be a
+little more than eight bits for 286 symbols and a little less than five bits
+for 30 symbols.
+
+
+2.2 More details on the inflate table lookup
+
+Ok, you want to know what this cleverly obfuscated inflate tree actually
+looks like. You are correct that it's not a Huffman tree. It is simply a
+lookup table for the first, let's say, nine bits of a Huffman symbol. The
+symbol could be as short as one bit or as long as 15 bits. If a particular
+symbol is shorter than nine bits, then that symbol's translation is duplicated
+in all those entries that start with that symbol's bits. For example, if the
+symbol is four bits, then it's duplicated 32 times in a nine-bit table. If a
+symbol is nine bits long, it appears in the table once.
+
+If the symbol is longer than nine bits, then that entry in the table points
+to another similar table for the remaining bits. Again, there are duplicated
+entries as needed. The idea is that most of the time the symbol will be short
+and there will only be one table look up. (That's whole idea behind data
+compression in the first place.) For the less frequent long symbols, there
+will be two lookups. If you had a compression method with really long
+symbols, you could have as many levels of lookups as is efficient. For
+inflate, two is enough.
+
+So a table entry either points to another table (in which case nine bits in
+the above example are gobbled), or it contains the translation for the symbol
+and the number of bits to gobble. Then you start again with the next
+ungobbled bit.
+
+You may wonder: why not just have one lookup table for how ever many bits the
+longest symbol is? The reason is that if you do that, you end up spending
+more time filling in duplicate symbol entries than you do actually decoding.
+At least for deflate's output that generates new trees every several 10's of
+kbytes. You can imagine that filling in a 2^15 entry table for a 15-bit code
+would take too long if you're only decoding several thousand symbols. At the
+other extreme, you could make a new table for every bit in the code. In fact,
+that's essentially a Huffman tree. But then you spend two much time
+traversing the tree while decoding, even for short symbols.
+
+So the number of bits for the first lookup table is a trade of the time to
+fill out the table vs. the time spent looking at the second level and above of
+the table.
+
+Here is an example, scaled down:
+
+The code being decoded, with 10 symbols, from 1 to 6 bits long:
+
+A: 0
+B: 10
+C: 1100
+D: 11010
+E: 11011
+F: 11100
+G: 11101
+H: 11110
+I: 111110
+J: 111111
+
+Let's make the first table three bits long (eight entries):
+
+000: A,1
+001: A,1
+010: A,1
+011: A,1
+100: B,2
+101: B,2
+110: -> table X (gobble 3 bits)
+111: -> table Y (gobble 3 bits)
+
+Each entry is what the bits decode as and how many bits that is, i.e. how
+many bits to gobble. Or the entry points to another table, with the number of
+bits to gobble implicit in the size of the table.
+
+Table X is two bits long since the longest code starting with 110 is five bits
+long:
+
+00: C,1
+01: C,1
+10: D,2
+11: E,2
+
+Table Y is three bits long since the longest code starting with 111 is six
+bits long:
+
+000: F,2
+001: F,2
+010: G,2
+011: G,2
+100: H,2
+101: H,2
+110: I,3
+111: J,3
+
+So what we have here are three tables with a total of 20 entries that had to
+be constructed. That's compared to 64 entries for a single table. Or
+compared to 16 entries for a Huffman tree (six two entry tables and one four
+entry table). Assuming that the code ideally represents the probability of
+the symbols, it takes on the average 1.25 lookups per symbol. That's compared
+to one lookup for the single table, or 1.66 lookups per symbol for the
+Huffman tree.
+
+There, I think that gives you a picture of what's going on. For inflate, the
+meaning of a particular symbol is often more than just a letter. It can be a
+byte (a "literal"), or it can be either a length or a distance which
+indicates a base value and a number of bits to fetch after the code that is
+added to the base value. Or it might be the special end-of-block code. The
+data structures created in inftrees.c try to encode all that information
+compactly in the tables.
+
+
+Jean-loup Gailly Mark Adler
+jloup@gzip.org madler@alumni.caltech.edu
+
+
+References:
+
+[LZ77] Ziv J., Lempel A., ``A Universal Algorithm for Sequential Data
+Compression,'' IEEE Transactions on Information Theory, Vol. 23, No. 3,
+pp. 337-343.
+
+``DEFLATE Compressed Data Format Specification'' available in
+http://www.ietf.org/rfc/rfc1951.txt
--- /dev/null
+++ b/src/gfx/zlib/compress.c
@@ -1,0 +1,74 @@
+/* compress.c -- compress a memory buffer
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id: compress.c,v 1.1.1.1 2005/04/24 21:39:38 giles Exp $ */
+
+#define ZLIB_INTERNAL
+#include "zlib.h"
+
+/* ===========================================================================
+ Compresses the source buffer into the destination buffer. The level
+ parameter has the same meaning as in deflateInit. sourceLen is the byte
+ length of the source buffer. Upon entry, destLen is the total size of the
+ destination buffer, which must be at least 0.1% larger than sourceLen plus
+ 12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
+
+ compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+ memory, Z_BUF_ERROR if there was not enough room in the output buffer,
+ Z_STREAM_ERROR if the level parameter is invalid.
+*/
+int ZEXPORT compress2 (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level)
+{+ z_stream stream;
+ int err;
+
+ stream.next_in = (Bytef*)source;
+ stream.avail_in = (uInt)sourceLen;
+#ifdef MAXSEG_64K
+ /* Check for source > 64K on 16-bit machine: */
+ if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
+#endif
+ stream.next_out = dest;
+ stream.avail_out = (uInt)*destLen;
+ if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
+
+ stream.zalloc = (alloc_func)0;
+ stream.zfree = (free_func)0;
+ stream.opaque = (voidpf)0;
+
+ err = deflateInit(&stream, level);
+ if (err != Z_OK) return err;
+
+ err = deflate(&stream, Z_FINISH);
+ if (err != Z_STREAM_END) {+ deflateEnd(&stream);
+ return err == Z_OK ? Z_BUF_ERROR : err;
+ }
+ *destLen = stream.total_out;
+
+ err = deflateEnd(&stream);
+ return err;
+}
+
+/* ===========================================================================
+ */
+int ZEXPORT compress (dest, destLen, source, sourceLen)
+ Bytef *dest;
+ uLongf *destLen;
+ const Bytef *source;
+ uLong sourceLen;
+{+ return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
+}
+
+/* ===========================================================================
+ If the default memLevel or windowBits for deflateInit() is changed, then
+ this function needs to be updated.
+ */
+uLong ZEXPORT compressBound (sourceLen)
+ uLong sourceLen;
+{+ return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + 11;
+}
--- /dev/null
+++ b/src/gfx/zlib/configure
@@ -1,0 +1,443 @@
+#!/bin/sh
+# configure script for zlib. This script is needed only if
+# you wish to build a shared library and your system supports them,
+# of if you need special compiler, flags or install directory.
+# Otherwise, you can just use directly "make test; make install"
+#
+# To create a shared library, use "configure --shared"; by default a static
+# library is created. If the primitive shared library support provided here
+# does not work, use ftp://prep.ai.mit.edu/pub/gnu/libtool-*.tar.gz
+#
+# To impose specific compiler or flags or install directory, use for example:
+# prefix=$HOME CC=cc CFLAGS="-O4" ./configure
+# or for csh/tcsh users:
+# (setenv prefix $HOME; setenv CC cc; setenv CFLAGS "-O4"; ./configure)
+# LDSHARED is the command to be used to create a shared library
+
+# Incorrect settings of CC or CFLAGS may prevent creating a shared library.
+# If you have problems, try without defining CC and CFLAGS before reporting
+# an error.
+
+LIBS=libz.a
+LDFLAGS="-L. ${LIBS}"+VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
+VER2=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < zlib.h`
+VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < zlib.h`
+AR=${AR-"ar rc"}+RANLIB=${RANLIB-"ranlib"}+prefix=${prefix-/usr/local}+exec_prefix=${exec_prefix-'${prefix}'}+libdir=${libdir-'${exec_prefix}/lib'}+includedir=${includedir-'${prefix}/include'}+mandir=${mandir-'${prefix}/share/man'}+shared_ext='.so'
+shared=0
+gcc=0
+old_cc="$CC"
+old_cflags="$CFLAGS"
+
+while test $# -ge 1
+do
+case "$1" in
+ -h* | --h*)
+ echo 'usage:'
+ echo ' configure [--shared] [--prefix=PREFIX] [--exec_prefix=EXPREFIX]'
+ echo ' [--libdir=LIBDIR] [--includedir=INCLUDEDIR]'
+ exit 0;;
+ -p*=* | --p*=*) prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
+ -e*=* | --e*=*) exec_prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
+ -l*=* | --libdir=*) libdir=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
+ -i*=* | --includedir=*) includedir=`echo $1 | sed 's/[-a-z_]*=//'`;shift;;
+ -p* | --p*) prefix="$2"; shift; shift;;
+ -e* | --e*) exec_prefix="$2"; shift; shift;;
+ -l* | --l*) libdir="$2"; shift; shift;;
+ -i* | --i*) includedir="$2"; shift; shift;;
+ -s* | --s*) shared=1; shift;;
+ *) echo "unknown option: $1"; echo "$0 --help for help"; exit 1;;
+ esac
+done
+
+test=ztest$$
+cat > $test.c <<EOF
+extern int getchar();
+int hello() {return getchar();}+EOF
+
+test -z "$CC" && echo Checking for gcc...
+cc=${CC-gcc}+cflags=${CFLAGS-"-O3"}+# to force the asm version use: CFLAGS="-O3 -DASMV" ./configure
+case "$cc" in
+ *gcc*) gcc=1;;
+esac
+
+if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then
+ CC="$cc"
+ SFLAGS=${CFLAGS-"-fPIC -O3"}+ CFLAGS="$cflags"
+ case `(uname -s || echo unknown) 2>/dev/null` in
+ Linux | linux | GNU | GNU/*) LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1"};;+ CYGWIN* | Cygwin* | cygwin* | OS/2* )
+ EXE='.exe';;
+ QNX*) # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4
+ # (alain.bonnefoy@icbt.com)
+ LDSHARED=${LDSHARED-"$cc -shared -Wl,-hlibz.so.1"};;+ HP-UX*) LDSHARED=${LDSHARED-"$cc -shared $SFLAGS"}+ shared_ext='.sl'
+ SHAREDLIB='libz.sl';;
+ Darwin*) shared_ext='.dylib'
+ SHAREDLIB=libz$shared_ext
+ SHAREDLIBV=libz.$VER$shared_ext
+ SHAREDLIBM=libz.$VER1$shared_ext
+ LDSHARED=${LDSHARED-"$cc -dynamiclib -install_name $libdir/$SHAREDLIBV -compatibility_version $VER2 -current_version $VER"};;+ *) LDSHARED=${LDSHARED-"$cc -shared"};;+ esac
+else
+ # find system name and corresponding cc options
+ CC=${CC-cc}+ case `(uname -sr || echo unknown) 2>/dev/null` in
+ HP-UX*) SFLAGS=${CFLAGS-"-O +z"}+ CFLAGS=${CFLAGS-"-O"}+# LDSHARED=${LDSHARED-"ld -b +vnocompatwarnings"}+ LDSHARED=${LDSHARED-"ld -b"}+ shared_ext='.sl'
+ SHAREDLIB='libz.sl';;
+ IRIX*) SFLAGS=${CFLAGS-"-ansi -O2 -rpath ."}+ CFLAGS=${CFLAGS-"-ansi -O2"}+ LDSHARED=${LDSHARED-"cc -shared"};;+ OSF1\ V4*) SFLAGS=${CFLAGS-"-O -std1"}+ CFLAGS=${CFLAGS-"-O -std1"}+ LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so -Wl,-msym -Wl,-rpath,$(libdir) -Wl,-set_version,${VER}:1.0"};;+ OSF1*) SFLAGS=${CFLAGS-"-O -std1"}+ CFLAGS=${CFLAGS-"-O -std1"}+ LDSHARED=${LDSHARED-"cc -shared"};;+ QNX*) SFLAGS=${CFLAGS-"-4 -O"}+ CFLAGS=${CFLAGS-"-4 -O"}+ LDSHARED=${LDSHARED-"cc"}+ RANLIB=${RANLIB-"true"}+ AR="cc -A";;
+ SCO_SV\ 3.2*) SFLAGS=${CFLAGS-"-O3 -dy -KPIC "}+ CFLAGS=${CFLAGS-"-O3"}+ LDSHARED=${LDSHARED-"cc -dy -KPIC -G"};;+ SunOS\ 5*) SFLAGS=${CFLAGS-"-fast -xcg89 -KPIC -R."}+ CFLAGS=${CFLAGS-"-fast -xcg89"}+ LDSHARED=${LDSHARED-"cc -G"};;+ SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}+ CFLAGS=${CFLAGS-"-O2"}+ LDSHARED=${LDSHARED-"ld"};;+ UNIX_System_V\ 4.2.0)
+ SFLAGS=${CFLAGS-"-KPIC -O"}+ CFLAGS=${CFLAGS-"-O"}+ LDSHARED=${LDSHARED-"cc -G"};;+ UNIX_SV\ 4.2MP)
+ SFLAGS=${CFLAGS-"-Kconform_pic -O"}+ CFLAGS=${CFLAGS-"-O"}+ LDSHARED=${LDSHARED-"cc -G"};;+ OpenUNIX\ 5)
+ SFLAGS=${CFLAGS-"-KPIC -O"}+ CFLAGS=${CFLAGS-"-O"}+ LDSHARED=${LDSHARED-"cc -G"};;+ AIX*) # Courtesy of dbakker@arrayasolutions.com
+ SFLAGS=${CFLAGS-"-O -qmaxmem=8192"}+ CFLAGS=${CFLAGS-"-O -qmaxmem=8192"}+ LDSHARED=${LDSHARED-"xlc -G"};;+ # send working options for other systems to support@gzip.org
+ *) SFLAGS=${CFLAGS-"-O"}+ CFLAGS=${CFLAGS-"-O"}+ LDSHARED=${LDSHARED-"cc -shared"};;+ esac
+fi
+
+SHAREDLIB=${SHAREDLIB-"libz$shared_ext"}+SHAREDLIBV=${SHAREDLIBV-"libz$shared_ext.$VER"}+SHAREDLIBM=${SHAREDLIBM-"libz$shared_ext.$VER1"}+
+if test $shared -eq 1; then
+ echo Checking for shared library support...
+ # we must test in two steps (cc then ld), required at least on SunOS 4.x
+ if test "`($CC -c $SFLAGS $test.c) 2>&1`" = "" &&
+ test "`($LDSHARED -o $test$shared_ext $test.o) 2>&1`" = ""; then
+ CFLAGS="$SFLAGS"
+ LIBS="$SHAREDLIBV"
+ echo Building shared library $SHAREDLIBV with $CC.
+ elif test -z "$old_cc" -a -z "$old_cflags"; then
+ echo No shared library support.
+ shared=0;
+ else
+ echo 'No shared library support; try without defining CC and CFLAGS'
+ shared=0;
+ fi
+fi
+if test $shared -eq 0; then
+ LDSHARED="$CC"
+ echo Building static library $LIBS version $VER with $CC.
+else
+ LDFLAGS="-L. ${SHAREDLIBV}"+fi
+
+cat > $test.c <<EOF
+#include <unistd.h>
+int main() { return 0; }+EOF
+if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ sed < zconf.in.h "/HAVE_UNISTD_H/s%0%1%" > zconf.h
+ echo "Checking for unistd.h... Yes."
+else
+ cp -p zconf.in.h zconf.h
+ echo "Checking for unistd.h... No."
+fi
+
+cat > $test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+#include "zconf.h"
+
+int main()
+{+#ifndef STDC
+ choke me
+#endif
+
+ return 0;
+}
+EOF
+
+if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()"
+
+ cat > $test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+
+int mytest(char *fmt, ...)
+{+ char buf[20];
+ va_list ap;
+
+ va_start(ap, fmt);
+ vsnprintf(buf, sizeof(buf), fmt, ap);
+ va_end(ap);
+ return 0;
+}
+
+int main()
+{+ return (mytest("Hello%d\n", 1));+}
+EOF
+
+ if test "`($CC $CFLAGS -o $test $test.c) 2>&1`" = ""; then
+ echo "Checking for vsnprintf() in stdio.h... Yes."
+
+ cat >$test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+
+int mytest(char *fmt, ...)
+{+ int n;
+ char buf[20];
+ va_list ap;
+
+ va_start(ap, fmt);
+ n = vsnprintf(buf, sizeof(buf), fmt, ap);
+ va_end(ap);
+ return n;
+}
+
+int main()
+{+ return (mytest("Hello%d\n", 1));+}
+EOF
+
+ if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ echo "Checking for return value of vsnprintf()... Yes."
+ else
+ CFLAGS="$CFLAGS -DHAS_vsnprintf_void"
+ echo "Checking for return value of vsnprintf()... No."
+ echo " WARNING: apparently vsnprintf() does not return a value. zlib"
+ echo " can build but will be open to possible string-format security"
+ echo " vulnerabilities."
+ fi
+ else
+ CFLAGS="$CFLAGS -DNO_vsnprintf"
+ echo "Checking for vsnprintf() in stdio.h... No."
+ echo " WARNING: vsnprintf() not found, falling back to vsprintf(). zlib"
+ echo " can build but will be open to possible buffer-overflow security"
+ echo " vulnerabilities."
+
+ cat >$test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+
+int mytest(char *fmt, ...)
+{+ int n;
+ char buf[20];
+ va_list ap;
+
+ va_start(ap, fmt);
+ n = vsprintf(buf, fmt, ap);
+ va_end(ap);
+ return n;
+}
+
+int main()
+{+ return (mytest("Hello%d\n", 1));+}
+EOF
+
+ if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ echo "Checking for return value of vsprintf()... Yes."
+ else
+ CFLAGS="$CFLAGS -DHAS_vsprintf_void"
+ echo "Checking for return value of vsprintf()... No."
+ echo " WARNING: apparently vsprintf() does not return a value. zlib"
+ echo " can build but will be open to possible string-format security"
+ echo " vulnerabilities."
+ fi
+ fi
+else
+ echo "Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf()"
+
+ cat >$test.c <<EOF
+#include <stdio.h>
+
+int mytest()
+{+ char buf[20];
+
+ snprintf(buf, sizeof(buf), "%s", "foo");
+ return 0;
+}
+
+int main()
+{+ return (mytest());
+}
+EOF
+
+ if test "`($CC $CFLAGS -o $test $test.c) 2>&1`" = ""; then
+ echo "Checking for snprintf() in stdio.h... Yes."
+
+ cat >$test.c <<EOF
+#include <stdio.h>
+
+int mytest()
+{+ char buf[20];
+
+ return snprintf(buf, sizeof(buf), "%s", "foo");
+}
+
+int main()
+{+ return (mytest());
+}
+EOF
+
+ if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ echo "Checking for return value of snprintf()... Yes."
+ else
+ CFLAGS="$CFLAGS -DHAS_snprintf_void"
+ echo "Checking for return value of snprintf()... No."
+ echo " WARNING: apparently snprintf() does not return a value. zlib"
+ echo " can build but will be open to possible string-format security"
+ echo " vulnerabilities."
+ fi
+ else
+ CFLAGS="$CFLAGS -DNO_snprintf"
+ echo "Checking for snprintf() in stdio.h... No."
+ echo " WARNING: snprintf() not found, falling back to sprintf(). zlib"
+ echo " can build but will be open to possible buffer-overflow security"
+ echo " vulnerabilities."
+
+ cat >$test.c <<EOF
+#include <stdio.h>
+
+int mytest()
+{+ char buf[20];
+
+ return sprintf(buf, "%s", "foo");
+}
+
+int main()
+{+ return (mytest());
+}
+EOF
+
+ if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ echo "Checking for return value of sprintf()... Yes."
+ else
+ CFLAGS="$CFLAGS -DHAS_sprintf_void"
+ echo "Checking for return value of sprintf()... No."
+ echo " WARNING: apparently sprintf() does not return a value. zlib"
+ echo " can build but will be open to possible string-format security"
+ echo " vulnerabilities."
+ fi
+ fi
+fi
+
+cat >$test.c <<EOF
+#include <errno.h>
+int main() { return 0; }+EOF
+if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ echo "Checking for errno.h... Yes."
+else
+ echo "Checking for errno.h... No."
+ CFLAGS="$CFLAGS -DNO_ERRNO_H"
+fi
+
+cat > $test.c <<EOF
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+caddr_t hello() {+ return mmap((caddr_t)0, (off_t)0, PROT_READ, MAP_SHARED, 0, (off_t)0);
+}
+EOF
+if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ CFLAGS="$CFLAGS -DUSE_MMAP"
+ echo Checking for mmap support... Yes.
+else
+ echo Checking for mmap support... No.
+fi
+
+CPP=${CPP-"$CC -E"}+case $CFLAGS in
+ *ASMV*)
+ if test "`nm $test.o | grep _hello`" = ""; then
+ CPP="$CPP -DNO_UNDERLINE"
+ echo Checking for underline in external names... No.
+ else
+ echo Checking for underline in external names... Yes.
+ fi;;
+esac
+
+rm -f $test.[co] $test $test$shared_ext
+
+# udpate Makefile
+sed < Makefile.in "
+/^CC *=/s#=.*#=$CC#
+/^CFLAGS *=/s#=.*#=$CFLAGS#
+/^CPP *=/s#=.*#=$CPP#
+/^LDSHARED *=/s#=.*#=$LDSHARED#
+/^LIBS *=/s#=.*#=$LIBS#
+/^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
+/^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
+/^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
+/^AR *=/s#=.*#=$AR#
+/^RANLIB *=/s#=.*#=$RANLIB#
+/^EXE *=/s#=.*#=$EXE#
+/^prefix *=/s#=.*#=$prefix#
+/^exec_prefix *=/s#=.*#=$exec_prefix#
+/^libdir *=/s#=.*#=$libdir#
+/^includedir *=/s#=.*#=$includedir#
+/^mandir *=/s#=.*#=$mandir#
+/^LDFLAGS *=/s#=.*#=$LDFLAGS#
+" > Makefile
--- /dev/null
+++ b/src/gfx/zlib/crc32.c
@@ -1,0 +1,337 @@
+/* crc32.c -- compute the CRC-32 of a data stream
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ *
+ * Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
+ * CRC methods: exclusive-oring 32 bits of data at a time, and pre-computing
+ * tables for updating the shift register in one step with three exclusive-ors
+ * instead of four steps with four exclusive-ors. This results about a factor
+ * of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
+ */
+
+/* @(#) $Id: crc32.c,v 1.1.1.1 2005/04/24 21:39:37 giles Exp $ */
+
+/*
+ Note on the use of DYNAMIC_CRC_TABLE: there is no mutex or semaphore
+ protection on the static variables used to control the first-use generation
+ of the crc tables. Therefore, if you #define DYNAMIC_CRC_TABLE, you should
+ first call get_crc_table() to initialize the tables before allowing more than
+ one thread to use crc32().
+ */
+
+#ifdef MAKECRCH
+# include <stdio.h>
+# ifndef DYNAMIC_CRC_TABLE
+# define DYNAMIC_CRC_TABLE
+# endif /* !DYNAMIC_CRC_TABLE */
+#endif /* MAKECRCH */
+
+#ifdef __plan9__
+ typedef long long ptrdiff_t;
+#endif
+
+#include "zutil.h" /* for STDC and FAR definitions */
+
+#define local static
+
+/* Find a four-byte integer type for crc32_little() and crc32_big(). */
+#ifndef NOBYFOUR
+# ifdef STDC /* need ANSI C limits.h to determine sizes */
+# include <limits.h>
+# define BYFOUR
+# if (UINT_MAX == 0xffffffffUL)
+ typedef unsigned int u4;
+# else
+# if (ULONG_MAX == 0xffffffffUL)
+ typedef unsigned long u4;
+# else
+# if (USHRT_MAX == 0xffffffffUL)
+ typedef unsigned short u4;
+# else
+# undef BYFOUR /* can't find a four-byte integer type! */
+# endif
+# endif
+# endif
+# endif /* STDC */
+#endif /* !NOBYFOUR */
+
+/* Definitions for doing the crc four data bytes at a time. */
+#ifdef BYFOUR
+# define REV(w) (((w)>>24)+(((w)>>8)&0xff00)+ \
+ (((w)&0xff00)<<8)+(((w)&0xff)<<24))
+ local unsigned long crc32_little OF((unsigned long,
+ const unsigned char FAR *, unsigned));
+ local unsigned long crc32_big OF((unsigned long,
+ const unsigned char FAR *, unsigned));
+# define TBLS 8
+#else
+# define TBLS 1
+#endif /* BYFOUR */
+
+#ifdef DYNAMIC_CRC_TABLE
+
+local volatile int crc_table_empty = 1;
+local unsigned long FAR crc_table[TBLS][256];
+local void make_crc_table OF((void));
+#ifdef MAKECRCH
+ local void write_table OF((FILE *, const unsigned long FAR *));
+#endif /* MAKECRCH */
+
+/*
+ Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
+ x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
+
+ Polynomials over GF(2) are represented in binary, one bit per coefficient,
+ with the lowest powers in the most significant bit. Then adding polynomials
+ is just exclusive-or, and multiplying a polynomial by x is a right shift by
+ one. If we call the above polynomial p, and represent a byte as the
+ polynomial q, also with the lowest power in the most significant bit (so the
+ byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
+ where a mod b means the remainder after dividing a by b.
+
+ This calculation is done using the shift-register method of multiplying and
+ taking the remainder. The register is initialized to zero, and for each
+ incoming bit, x^32 is added mod p to the register if the bit is a one (where
+ x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
+ x (which is shifting right by one and adding x^32 mod p if the bit shifted
+ out is a one). We start with the highest power (least significant bit) of
+ q and repeat for all eight bits of q.
+
+ The first table is simply the CRC of all possible eight bit values. This is
+ all the information needed to generate CRCs on data a byte at a time for all
+ combinations of CRC register values and incoming bytes. The remaining tables
+ allow for word-at-a-time CRC calculation for both big-endian and little-
+ endian machines, where a word is four bytes.
+*/
+local void make_crc_table()
+{+ unsigned long c;
+ int n, k;
+ unsigned long poly; /* polynomial exclusive-or pattern */
+ /* terms of polynomial defining this crc (except x^32): */
+ static volatile int first = 1; /* flag to limit concurrent making */
+ static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};+
+ /* See if another task is already doing this (not thread-safe, but better
+ than nothing -- significantly reduces duration of vulnerability in
+ case the advice about DYNAMIC_CRC_TABLE is ignored) */
+ if (first) {+ first = 0;
+
+ /* make exclusive-or pattern from polynomial (0xedb88320UL) */
+ poly = 0UL;
+ for (n = 0; n < sizeof(p)/sizeof(unsigned char); n++)
+ poly |= 1UL << (31 - p[n]);
+
+ /* generate a crc for every 8-bit value */
+ for (n = 0; n < 256; n++) {+ c = (unsigned long)n;
+ for (k = 0; k < 8; k++)
+ c = c & 1 ? poly ^ (c >> 1) : c >> 1;
+ crc_table[0][n] = c;
+ }
+
+#ifdef BYFOUR
+ /* generate crc for each value followed by one, two, and three zeros,
+ and then the byte reversal of those as well as the first table */
+ for (n = 0; n < 256; n++) {+ c = crc_table[0][n];
+ crc_table[4][n] = REV(c);
+ for (k = 1; k < 4; k++) {+ c = crc_table[0][c & 0xff] ^ (c >> 8);
+ crc_table[k][n] = c;
+ crc_table[k + 4][n] = REV(c);
+ }
+ }
+#endif /* BYFOUR */
+
+ crc_table_empty = 0;
+ }
+ else { /* not first */+ /* wait for the other guy to finish (not efficient, but rare) */
+ while (crc_table_empty)
+ ;
+ }
+
+#ifdef MAKECRCH
+ /* write out CRC tables to crc32.h */
+ {+ FILE *out;
+
+ out = fopen("crc32.h", "w");+ if (out == NULL) return;
+ fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n");
+ fprintf(out, " * Generated automatically by crc32.c\n */\n\n");
+ fprintf(out, "local const unsigned long FAR ");
+ fprintf(out, "crc_table[TBLS][256] =\n{\n {\n");+ write_table(out, crc_table[0]);
+# ifdef BYFOUR
+ fprintf(out, "#ifdef BYFOUR\n");
+ for (k = 1; k < 8; k++) {+ fprintf(out, " },\n {\n");+ write_table(out, crc_table[k]);
+ }
+ fprintf(out, "#endif\n");
+# endif /* BYFOUR */
+ fprintf(out, " }\n};\n");
+ fclose(out);
+ }
+#endif /* MAKECRCH */
+}
+
+#ifdef MAKECRCH
+local void write_table(out, table)
+ FILE *out;
+ const unsigned long FAR *table;
+{+ int n;
+
+ for (n = 0; n < 256; n++)
+ fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ", table[n],
+ n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", "));
+}
+#endif /* MAKECRCH */
+
+#else /* !DYNAMIC_CRC_TABLE */
+/* ========================================================================
+ * Tables of CRC-32s of all single-byte values, made by make_crc_table().
+ */
+#include "crc32.h"
+#endif /* DYNAMIC_CRC_TABLE */
+
+/* =========================================================================
+ * This function can be used by asm versions of crc32()
+ */
+const unsigned long FAR * ZEXPORT get_crc_table()
+{+#ifdef DYNAMIC_CRC_TABLE
+ if (crc_table_empty)
+ make_crc_table();
+#endif /* DYNAMIC_CRC_TABLE */
+ return (const unsigned long FAR *)crc_table;
+}
+
+/* ========================================================================= */
+#define DO1 crc = crc_table[0][((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8)
+#define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
+
+/* ========================================================================= */
+unsigned long ZEXPORT crc32(crc, buf, len)
+ unsigned long crc;
+ const unsigned char FAR *buf;
+ unsigned len;
+{+ if (buf == Z_NULL) return 0UL;
+
+#ifdef DYNAMIC_CRC_TABLE
+ if (crc_table_empty)
+ make_crc_table();
+#endif /* DYNAMIC_CRC_TABLE */
+
+#ifdef BYFOUR
+ if (sizeof(void *) == sizeof(ptrdiff_t)) {+ u4 endian;
+
+ endian = 1;
+ if (*((unsigned char *)(&endian)))
+ return crc32_little(crc, buf, len);
+ else
+ return crc32_big(crc, buf, len);
+ }
+#endif /* BYFOUR */
+ crc = crc ^ 0xffffffffUL;
+ while (len >= 8) {+ DO8;
+ len -= 8;
+ }
+ if (len) do {+ DO1;
+ } while (--len);
+ return crc ^ 0xffffffffUL;
+}
+
+#ifdef BYFOUR
+
+/* ========================================================================= */
+#define DOLIT4 c ^= *buf4++; \
+ c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \
+ crc_table[1][(c >> 16) & 0xff] ^ crc_table[0][c >> 24]
+#define DOLIT32 DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4
+
+/* ========================================================================= */
+local unsigned long crc32_little(crc, buf, len)
+ unsigned long crc;
+ const unsigned char FAR *buf;
+ unsigned len;
+{+ register u4 c;
+ register const u4 FAR *buf4;
+
+ c = (u4)crc;
+ c = ~c;
+ while (len && ((ptrdiff_t)buf & 3)) {+ c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
+ len--;
+ }
+
+ buf4 = (const u4 FAR *)buf;
+ while (len >= 32) {+ DOLIT32;
+ len -= 32;
+ }
+ while (len >= 4) {+ DOLIT4;
+ len -= 4;
+ }
+ buf = (const unsigned char FAR *)buf4;
+
+ if (len) do {+ c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
+ } while (--len);
+ c = ~c;
+ return (unsigned long)c;
+}
+
+/* ========================================================================= */
+#define DOBIG4 c ^= *++buf4; \
+ c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \
+ crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24]
+#define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4
+
+/* ========================================================================= */
+local unsigned long crc32_big(crc, buf, len)
+ unsigned long crc;
+ const unsigned char FAR *buf;
+ unsigned len;
+{+ register u4 c;
+ register const u4 FAR *buf4;
+
+ c = REV((u4)crc);
+ c = ~c;
+ while (len && ((ptrdiff_t)buf & 3)) {+ c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
+ len--;
+ }
+
+ buf4 = (const u4 FAR *)buf;
+ buf4--;
+ while (len >= 32) {+ DOBIG32;
+ len -= 32;
+ }
+ while (len >= 4) {+ DOBIG4;
+ len -= 4;
+ }
+ buf4++;
+ buf = (const unsigned char FAR *)buf4;
+
+ if (len) do {+ c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
+ } while (--len);
+ c = ~c;
+ return (unsigned long)(REV(c));
+}
+
+#endif /* BYFOUR */
--- /dev/null
+++ b/src/gfx/zlib/crc32.h
@@ -1,0 +1,441 @@
+/* crc32.h -- tables for rapid CRC calculation
+ * Generated automatically by crc32.c
+ */
+
+local const unsigned long FAR crc_table[TBLS][256] =
+{+ {+ 0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,
+ 0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL,
+ 0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL,
+ 0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL,
+ 0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL,
+ 0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL,
+ 0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL,
+ 0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL,
+ 0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL,
+ 0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL,
+ 0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL,
+ 0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL,
+ 0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL,
+ 0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL,
+ 0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL,
+ 0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL,
+ 0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL,
+ 0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL,
+ 0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL,
+ 0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL,
+ 0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL,
+ 0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL,
+ 0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL,
+ 0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL,
+ 0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL,
+ 0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL,
+ 0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL,
+ 0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL,
+ 0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL,
+ 0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL,
+ 0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL,
+ 0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL,
+ 0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL,
+ 0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL,
+ 0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL,
+ 0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL,
+ 0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL,
+ 0xb2bd0b28UL, 0x2bb45a92UL, 0x5cb36a04UL, 0xc2d7ffa7UL, 0xb5d0cf31UL,
+ 0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL,
+ 0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL,
+ 0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL,
+ 0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL,
+ 0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL,
+ 0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL,
+ 0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL,
+ 0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL,
+ 0x4969474dUL, 0x3e6e77dbUL, 0xaed16a4aUL, 0xd9d65adcUL, 0x40df0b66UL,
+ 0x37d83bf0UL, 0xa9bcae53UL, 0xdebb9ec5UL, 0x47b2cf7fUL, 0x30b5ffe9UL,
+ 0xbdbdf21cUL, 0xcabac28aUL, 0x53b39330UL, 0x24b4a3a6UL, 0xbad03605UL,
+ 0xcdd70693UL, 0x54de5729UL, 0x23d967bfUL, 0xb3667a2eUL, 0xc4614ab8UL,
+ 0x5d681b02UL, 0x2a6f2b94UL, 0xb40bbe37UL, 0xc30c8ea1UL, 0x5a05df1bUL,
+ 0x2d02ef8dUL
+#ifdef BYFOUR
+ },
+ {+ 0x00000000UL, 0x191b3141UL, 0x32366282UL, 0x2b2d53c3UL, 0x646cc504UL,
+ 0x7d77f445UL, 0x565aa786UL, 0x4f4196c7UL, 0xc8d98a08UL, 0xd1c2bb49UL,
+ 0xfaefe88aUL, 0xe3f4d9cbUL, 0xacb54f0cUL, 0xb5ae7e4dUL, 0x9e832d8eUL,
+ 0x87981ccfUL, 0x4ac21251UL, 0x53d92310UL, 0x78f470d3UL, 0x61ef4192UL,
+ 0x2eaed755UL, 0x37b5e614UL, 0x1c98b5d7UL, 0x05838496UL, 0x821b9859UL,
+ 0x9b00a918UL, 0xb02dfadbUL, 0xa936cb9aUL, 0xe6775d5dUL, 0xff6c6c1cUL,
+ 0xd4413fdfUL, 0xcd5a0e9eUL, 0x958424a2UL, 0x8c9f15e3UL, 0xa7b24620UL,
+ 0xbea97761UL, 0xf1e8e1a6UL, 0xe8f3d0e7UL, 0xc3de8324UL, 0xdac5b265UL,
+ 0x5d5daeaaUL, 0x44469febUL, 0x6f6bcc28UL, 0x7670fd69UL, 0x39316baeUL,
+ 0x202a5aefUL, 0x0b07092cUL, 0x121c386dUL, 0xdf4636f3UL, 0xc65d07b2UL,
+ 0xed705471UL, 0xf46b6530UL, 0xbb2af3f7UL, 0xa231c2b6UL, 0x891c9175UL,
+ 0x9007a034UL, 0x179fbcfbUL, 0x0e848dbaUL, 0x25a9de79UL, 0x3cb2ef38UL,
+ 0x73f379ffUL, 0x6ae848beUL, 0x41c51b7dUL, 0x58de2a3cUL, 0xf0794f05UL,
+ 0xe9627e44UL, 0xc24f2d87UL, 0xdb541cc6UL, 0x94158a01UL, 0x8d0ebb40UL,
+ 0xa623e883UL, 0xbf38d9c2UL, 0x38a0c50dUL, 0x21bbf44cUL, 0x0a96a78fUL,
+ 0x138d96ceUL, 0x5ccc0009UL, 0x45d73148UL, 0x6efa628bUL, 0x77e153caUL,
+ 0xbabb5d54UL, 0xa3a06c15UL, 0x888d3fd6UL, 0x91960e97UL, 0xded79850UL,
+ 0xc7cca911UL, 0xece1fad2UL, 0xf5facb93UL, 0x7262d75cUL, 0x6b79e61dUL,
+ 0x4054b5deUL, 0x594f849fUL, 0x160e1258UL, 0x0f152319UL, 0x243870daUL,
+ 0x3d23419bUL, 0x65fd6ba7UL, 0x7ce65ae6UL, 0x57cb0925UL, 0x4ed03864UL,
+ 0x0191aea3UL, 0x188a9fe2UL, 0x33a7cc21UL, 0x2abcfd60UL, 0xad24e1afUL,
+ 0xb43fd0eeUL, 0x9f12832dUL, 0x8609b26cUL, 0xc94824abUL, 0xd05315eaUL,
+ 0xfb7e4629UL, 0xe2657768UL, 0x2f3f79f6UL, 0x362448b7UL, 0x1d091b74UL,
+ 0x04122a35UL, 0x4b53bcf2UL, 0x52488db3UL, 0x7965de70UL, 0x607eef31UL,
+ 0xe7e6f3feUL, 0xfefdc2bfUL, 0xd5d0917cUL, 0xcccba03dUL, 0x838a36faUL,
+ 0x9a9107bbUL, 0xb1bc5478UL, 0xa8a76539UL, 0x3b83984bUL, 0x2298a90aUL,
+ 0x09b5fac9UL, 0x10aecb88UL, 0x5fef5d4fUL, 0x46f46c0eUL, 0x6dd93fcdUL,
+ 0x74c20e8cUL, 0xf35a1243UL, 0xea412302UL, 0xc16c70c1UL, 0xd8774180UL,
+ 0x9736d747UL, 0x8e2de606UL, 0xa500b5c5UL, 0xbc1b8484UL, 0x71418a1aUL,
+ 0x685abb5bUL, 0x4377e898UL, 0x5a6cd9d9UL, 0x152d4f1eUL, 0x0c367e5fUL,
+ 0x271b2d9cUL, 0x3e001cddUL, 0xb9980012UL, 0xa0833153UL, 0x8bae6290UL,
+ 0x92b553d1UL, 0xddf4c516UL, 0xc4eff457UL, 0xefc2a794UL, 0xf6d996d5UL,
+ 0xae07bce9UL, 0xb71c8da8UL, 0x9c31de6bUL, 0x852aef2aUL, 0xca6b79edUL,
+ 0xd37048acUL, 0xf85d1b6fUL, 0xe1462a2eUL, 0x66de36e1UL, 0x7fc507a0UL,
+ 0x54e85463UL, 0x4df36522UL, 0x02b2f3e5UL, 0x1ba9c2a4UL, 0x30849167UL,
+ 0x299fa026UL, 0xe4c5aeb8UL, 0xfdde9ff9UL, 0xd6f3cc3aUL, 0xcfe8fd7bUL,
+ 0x80a96bbcUL, 0x99b25afdUL, 0xb29f093eUL, 0xab84387fUL, 0x2c1c24b0UL,
+ 0x350715f1UL, 0x1e2a4632UL, 0x07317773UL, 0x4870e1b4UL, 0x516bd0f5UL,
+ 0x7a468336UL, 0x635db277UL, 0xcbfad74eUL, 0xd2e1e60fUL, 0xf9ccb5ccUL,
+ 0xe0d7848dUL, 0xaf96124aUL, 0xb68d230bUL, 0x9da070c8UL, 0x84bb4189UL,
+ 0x03235d46UL, 0x1a386c07UL, 0x31153fc4UL, 0x280e0e85UL, 0x674f9842UL,
+ 0x7e54a903UL, 0x5579fac0UL, 0x4c62cb81UL, 0x8138c51fUL, 0x9823f45eUL,
+ 0xb30ea79dUL, 0xaa1596dcUL, 0xe554001bUL, 0xfc4f315aUL, 0xd7626299UL,
+ 0xce7953d8UL, 0x49e14f17UL, 0x50fa7e56UL, 0x7bd72d95UL, 0x62cc1cd4UL,
+ 0x2d8d8a13UL, 0x3496bb52UL, 0x1fbbe891UL, 0x06a0d9d0UL, 0x5e7ef3ecUL,
+ 0x4765c2adUL, 0x6c48916eUL, 0x7553a02fUL, 0x3a1236e8UL, 0x230907a9UL,
+ 0x0824546aUL, 0x113f652bUL, 0x96a779e4UL, 0x8fbc48a5UL, 0xa4911b66UL,
+ 0xbd8a2a27UL, 0xf2cbbce0UL, 0xebd08da1UL, 0xc0fdde62UL, 0xd9e6ef23UL,
+ 0x14bce1bdUL, 0x0da7d0fcUL, 0x268a833fUL, 0x3f91b27eUL, 0x70d024b9UL,
+ 0x69cb15f8UL, 0x42e6463bUL, 0x5bfd777aUL, 0xdc656bb5UL, 0xc57e5af4UL,
+ 0xee530937UL, 0xf7483876UL, 0xb809aeb1UL, 0xa1129ff0UL, 0x8a3fcc33UL,
+ 0x9324fd72UL
+ },
+ {+ 0x00000000UL, 0x01c26a37UL, 0x0384d46eUL, 0x0246be59UL, 0x0709a8dcUL,
+ 0x06cbc2ebUL, 0x048d7cb2UL, 0x054f1685UL, 0x0e1351b8UL, 0x0fd13b8fUL,
+ 0x0d9785d6UL, 0x0c55efe1UL, 0x091af964UL, 0x08d89353UL, 0x0a9e2d0aUL,
+ 0x0b5c473dUL, 0x1c26a370UL, 0x1de4c947UL, 0x1fa2771eUL, 0x1e601d29UL,
+ 0x1b2f0bacUL, 0x1aed619bUL, 0x18abdfc2UL, 0x1969b5f5UL, 0x1235f2c8UL,
+ 0x13f798ffUL, 0x11b126a6UL, 0x10734c91UL, 0x153c5a14UL, 0x14fe3023UL,
+ 0x16b88e7aUL, 0x177ae44dUL, 0x384d46e0UL, 0x398f2cd7UL, 0x3bc9928eUL,
+ 0x3a0bf8b9UL, 0x3f44ee3cUL, 0x3e86840bUL, 0x3cc03a52UL, 0x3d025065UL,
+ 0x365e1758UL, 0x379c7d6fUL, 0x35dac336UL, 0x3418a901UL, 0x3157bf84UL,
+ 0x3095d5b3UL, 0x32d36beaUL, 0x331101ddUL, 0x246be590UL, 0x25a98fa7UL,
+ 0x27ef31feUL, 0x262d5bc9UL, 0x23624d4cUL, 0x22a0277bUL, 0x20e69922UL,
+ 0x2124f315UL, 0x2a78b428UL, 0x2bbade1fUL, 0x29fc6046UL, 0x283e0a71UL,
+ 0x2d711cf4UL, 0x2cb376c3UL, 0x2ef5c89aUL, 0x2f37a2adUL, 0x709a8dc0UL,
+ 0x7158e7f7UL, 0x731e59aeUL, 0x72dc3399UL, 0x7793251cUL, 0x76514f2bUL,
+ 0x7417f172UL, 0x75d59b45UL, 0x7e89dc78UL, 0x7f4bb64fUL, 0x7d0d0816UL,
+ 0x7ccf6221UL, 0x798074a4UL, 0x78421e93UL, 0x7a04a0caUL, 0x7bc6cafdUL,
+ 0x6cbc2eb0UL, 0x6d7e4487UL, 0x6f38fadeUL, 0x6efa90e9UL, 0x6bb5866cUL,
+ 0x6a77ec5bUL, 0x68315202UL, 0x69f33835UL, 0x62af7f08UL, 0x636d153fUL,
+ 0x612bab66UL, 0x60e9c151UL, 0x65a6d7d4UL, 0x6464bde3UL, 0x662203baUL,
+ 0x67e0698dUL, 0x48d7cb20UL, 0x4915a117UL, 0x4b531f4eUL, 0x4a917579UL,
+ 0x4fde63fcUL, 0x4e1c09cbUL, 0x4c5ab792UL, 0x4d98dda5UL, 0x46c49a98UL,
+ 0x4706f0afUL, 0x45404ef6UL, 0x448224c1UL, 0x41cd3244UL, 0x400f5873UL,
+ 0x4249e62aUL, 0x438b8c1dUL, 0x54f16850UL, 0x55330267UL, 0x5775bc3eUL,
+ 0x56b7d609UL, 0x53f8c08cUL, 0x523aaabbUL, 0x507c14e2UL, 0x51be7ed5UL,
+ 0x5ae239e8UL, 0x5b2053dfUL, 0x5966ed86UL, 0x58a487b1UL, 0x5deb9134UL,
+ 0x5c29fb03UL, 0x5e6f455aUL, 0x5fad2f6dUL, 0xe1351b80UL, 0xe0f771b7UL,
+ 0xe2b1cfeeUL, 0xe373a5d9UL, 0xe63cb35cUL, 0xe7fed96bUL, 0xe5b86732UL,
+ 0xe47a0d05UL, 0xef264a38UL, 0xeee4200fUL, 0xeca29e56UL, 0xed60f461UL,
+ 0xe82fe2e4UL, 0xe9ed88d3UL, 0xebab368aUL, 0xea695cbdUL, 0xfd13b8f0UL,
+ 0xfcd1d2c7UL, 0xfe976c9eUL, 0xff5506a9UL, 0xfa1a102cUL, 0xfbd87a1bUL,
+ 0xf99ec442UL, 0xf85cae75UL, 0xf300e948UL, 0xf2c2837fUL, 0xf0843d26UL,
+ 0xf1465711UL, 0xf4094194UL, 0xf5cb2ba3UL, 0xf78d95faUL, 0xf64fffcdUL,
+ 0xd9785d60UL, 0xd8ba3757UL, 0xdafc890eUL, 0xdb3ee339UL, 0xde71f5bcUL,
+ 0xdfb39f8bUL, 0xddf521d2UL, 0xdc374be5UL, 0xd76b0cd8UL, 0xd6a966efUL,
+ 0xd4efd8b6UL, 0xd52db281UL, 0xd062a404UL, 0xd1a0ce33UL, 0xd3e6706aUL,
+ 0xd2241a5dUL, 0xc55efe10UL, 0xc49c9427UL, 0xc6da2a7eUL, 0xc7184049UL,
+ 0xc25756ccUL, 0xc3953cfbUL, 0xc1d382a2UL, 0xc011e895UL, 0xcb4dafa8UL,
+ 0xca8fc59fUL, 0xc8c97bc6UL, 0xc90b11f1UL, 0xcc440774UL, 0xcd866d43UL,
+ 0xcfc0d31aUL, 0xce02b92dUL, 0x91af9640UL, 0x906dfc77UL, 0x922b422eUL,
+ 0x93e92819UL, 0x96a63e9cUL, 0x976454abUL, 0x9522eaf2UL, 0x94e080c5UL,
+ 0x9fbcc7f8UL, 0x9e7eadcfUL, 0x9c381396UL, 0x9dfa79a1UL, 0x98b56f24UL,
+ 0x99770513UL, 0x9b31bb4aUL, 0x9af3d17dUL, 0x8d893530UL, 0x8c4b5f07UL,
+ 0x8e0de15eUL, 0x8fcf8b69UL, 0x8a809decUL, 0x8b42f7dbUL, 0x89044982UL,
+ 0x88c623b5UL, 0x839a6488UL, 0x82580ebfUL, 0x801eb0e6UL, 0x81dcdad1UL,
+ 0x8493cc54UL, 0x8551a663UL, 0x8717183aUL, 0x86d5720dUL, 0xa9e2d0a0UL,
+ 0xa820ba97UL, 0xaa6604ceUL, 0xaba46ef9UL, 0xaeeb787cUL, 0xaf29124bUL,
+ 0xad6fac12UL, 0xacadc625UL, 0xa7f18118UL, 0xa633eb2fUL, 0xa4755576UL,
+ 0xa5b73f41UL, 0xa0f829c4UL, 0xa13a43f3UL, 0xa37cfdaaUL, 0xa2be979dUL,
+ 0xb5c473d0UL, 0xb40619e7UL, 0xb640a7beUL, 0xb782cd89UL, 0xb2cddb0cUL,
+ 0xb30fb13bUL, 0xb1490f62UL, 0xb08b6555UL, 0xbbd72268UL, 0xba15485fUL,
+ 0xb853f606UL, 0xb9919c31UL, 0xbcde8ab4UL, 0xbd1ce083UL, 0xbf5a5edaUL,
+ 0xbe9834edUL
+ },
+ {+ 0x00000000UL, 0xb8bc6765UL, 0xaa09c88bUL, 0x12b5afeeUL, 0x8f629757UL,
+ 0x37def032UL, 0x256b5fdcUL, 0x9dd738b9UL, 0xc5b428efUL, 0x7d084f8aUL,
+ 0x6fbde064UL, 0xd7018701UL, 0x4ad6bfb8UL, 0xf26ad8ddUL, 0xe0df7733UL,
+ 0x58631056UL, 0x5019579fUL, 0xe8a530faUL, 0xfa109f14UL, 0x42acf871UL,
+ 0xdf7bc0c8UL, 0x67c7a7adUL, 0x75720843UL, 0xcdce6f26UL, 0x95ad7f70UL,
+ 0x2d111815UL, 0x3fa4b7fbUL, 0x8718d09eUL, 0x1acfe827UL, 0xa2738f42UL,
+ 0xb0c620acUL, 0x087a47c9UL, 0xa032af3eUL, 0x188ec85bUL, 0x0a3b67b5UL,
+ 0xb28700d0UL, 0x2f503869UL, 0x97ec5f0cUL, 0x8559f0e2UL, 0x3de59787UL,
+ 0x658687d1UL, 0xdd3ae0b4UL, 0xcf8f4f5aUL, 0x7733283fUL, 0xeae41086UL,
+ 0x525877e3UL, 0x40edd80dUL, 0xf851bf68UL, 0xf02bf8a1UL, 0x48979fc4UL,
+ 0x5a22302aUL, 0xe29e574fUL, 0x7f496ff6UL, 0xc7f50893UL, 0xd540a77dUL,
+ 0x6dfcc018UL, 0x359fd04eUL, 0x8d23b72bUL, 0x9f9618c5UL, 0x272a7fa0UL,
+ 0xbafd4719UL, 0x0241207cUL, 0x10f48f92UL, 0xa848e8f7UL, 0x9b14583dUL,
+ 0x23a83f58UL, 0x311d90b6UL, 0x89a1f7d3UL, 0x1476cf6aUL, 0xaccaa80fUL,
+ 0xbe7f07e1UL, 0x06c36084UL, 0x5ea070d2UL, 0xe61c17b7UL, 0xf4a9b859UL,
+ 0x4c15df3cUL, 0xd1c2e785UL, 0x697e80e0UL, 0x7bcb2f0eUL, 0xc377486bUL,
+ 0xcb0d0fa2UL, 0x73b168c7UL, 0x6104c729UL, 0xd9b8a04cUL, 0x446f98f5UL,
+ 0xfcd3ff90UL, 0xee66507eUL, 0x56da371bUL, 0x0eb9274dUL, 0xb6054028UL,
+ 0xa4b0efc6UL, 0x1c0c88a3UL, 0x81dbb01aUL, 0x3967d77fUL, 0x2bd27891UL,
+ 0x936e1ff4UL, 0x3b26f703UL, 0x839a9066UL, 0x912f3f88UL, 0x299358edUL,
+ 0xb4446054UL, 0x0cf80731UL, 0x1e4da8dfUL, 0xa6f1cfbaUL, 0xfe92dfecUL,
+ 0x462eb889UL, 0x549b1767UL, 0xec277002UL, 0x71f048bbUL, 0xc94c2fdeUL,
+ 0xdbf98030UL, 0x6345e755UL, 0x6b3fa09cUL, 0xd383c7f9UL, 0xc1366817UL,
+ 0x798a0f72UL, 0xe45d37cbUL, 0x5ce150aeUL, 0x4e54ff40UL, 0xf6e89825UL,
+ 0xae8b8873UL, 0x1637ef16UL, 0x048240f8UL, 0xbc3e279dUL, 0x21e91f24UL,
+ 0x99557841UL, 0x8be0d7afUL, 0x335cb0caUL, 0xed59b63bUL, 0x55e5d15eUL,
+ 0x47507eb0UL, 0xffec19d5UL, 0x623b216cUL, 0xda874609UL, 0xc832e9e7UL,
+ 0x708e8e82UL, 0x28ed9ed4UL, 0x9051f9b1UL, 0x82e4565fUL, 0x3a58313aUL,
+ 0xa78f0983UL, 0x1f336ee6UL, 0x0d86c108UL, 0xb53aa66dUL, 0xbd40e1a4UL,
+ 0x05fc86c1UL, 0x1749292fUL, 0xaff54e4aUL, 0x322276f3UL, 0x8a9e1196UL,
+ 0x982bbe78UL, 0x2097d91dUL, 0x78f4c94bUL, 0xc048ae2eUL, 0xd2fd01c0UL,
+ 0x6a4166a5UL, 0xf7965e1cUL, 0x4f2a3979UL, 0x5d9f9697UL, 0xe523f1f2UL,
+ 0x4d6b1905UL, 0xf5d77e60UL, 0xe762d18eUL, 0x5fdeb6ebUL, 0xc2098e52UL,
+ 0x7ab5e937UL, 0x680046d9UL, 0xd0bc21bcUL, 0x88df31eaUL, 0x3063568fUL,
+ 0x22d6f961UL, 0x9a6a9e04UL, 0x07bda6bdUL, 0xbf01c1d8UL, 0xadb46e36UL,
+ 0x15080953UL, 0x1d724e9aUL, 0xa5ce29ffUL, 0xb77b8611UL, 0x0fc7e174UL,
+ 0x9210d9cdUL, 0x2aacbea8UL, 0x38191146UL, 0x80a57623UL, 0xd8c66675UL,
+ 0x607a0110UL, 0x72cfaefeUL, 0xca73c99bUL, 0x57a4f122UL, 0xef189647UL,
+ 0xfdad39a9UL, 0x45115eccUL, 0x764dee06UL, 0xcef18963UL, 0xdc44268dUL,
+ 0x64f841e8UL, 0xf92f7951UL, 0x41931e34UL, 0x5326b1daUL, 0xeb9ad6bfUL,
+ 0xb3f9c6e9UL, 0x0b45a18cUL, 0x19f00e62UL, 0xa14c6907UL, 0x3c9b51beUL,
+ 0x842736dbUL, 0x96929935UL, 0x2e2efe50UL, 0x2654b999UL, 0x9ee8defcUL,
+ 0x8c5d7112UL, 0x34e11677UL, 0xa9362eceUL, 0x118a49abUL, 0x033fe645UL,
+ 0xbb838120UL, 0xe3e09176UL, 0x5b5cf613UL, 0x49e959fdUL, 0xf1553e98UL,
+ 0x6c820621UL, 0xd43e6144UL, 0xc68bceaaUL, 0x7e37a9cfUL, 0xd67f4138UL,
+ 0x6ec3265dUL, 0x7c7689b3UL, 0xc4caeed6UL, 0x591dd66fUL, 0xe1a1b10aUL,
+ 0xf3141ee4UL, 0x4ba87981UL, 0x13cb69d7UL, 0xab770eb2UL, 0xb9c2a15cUL,
+ 0x017ec639UL, 0x9ca9fe80UL, 0x241599e5UL, 0x36a0360bUL, 0x8e1c516eUL,
+ 0x866616a7UL, 0x3eda71c2UL, 0x2c6fde2cUL, 0x94d3b949UL, 0x090481f0UL,
+ 0xb1b8e695UL, 0xa30d497bUL, 0x1bb12e1eUL, 0x43d23e48UL, 0xfb6e592dUL,
+ 0xe9dbf6c3UL, 0x516791a6UL, 0xccb0a91fUL, 0x740cce7aUL, 0x66b96194UL,
+ 0xde0506f1UL
+ },
+ {+ 0x00000000UL, 0x96300777UL, 0x2c610eeeUL, 0xba510999UL, 0x19c46d07UL,
+ 0x8ff46a70UL, 0x35a563e9UL, 0xa395649eUL, 0x3288db0eUL, 0xa4b8dc79UL,
+ 0x1ee9d5e0UL, 0x88d9d297UL, 0x2b4cb609UL, 0xbd7cb17eUL, 0x072db8e7UL,
+ 0x911dbf90UL, 0x6410b71dUL, 0xf220b06aUL, 0x4871b9f3UL, 0xde41be84UL,
+ 0x7dd4da1aUL, 0xebe4dd6dUL, 0x51b5d4f4UL, 0xc785d383UL, 0x56986c13UL,
+ 0xc0a86b64UL, 0x7af962fdUL, 0xecc9658aUL, 0x4f5c0114UL, 0xd96c0663UL,
+ 0x633d0ffaUL, 0xf50d088dUL, 0xc8206e3bUL, 0x5e10694cUL, 0xe44160d5UL,
+ 0x727167a2UL, 0xd1e4033cUL, 0x47d4044bUL, 0xfd850dd2UL, 0x6bb50aa5UL,
+ 0xfaa8b535UL, 0x6c98b242UL, 0xd6c9bbdbUL, 0x40f9bcacUL, 0xe36cd832UL,
+ 0x755cdf45UL, 0xcf0dd6dcUL, 0x593dd1abUL, 0xac30d926UL, 0x3a00de51UL,
+ 0x8051d7c8UL, 0x1661d0bfUL, 0xb5f4b421UL, 0x23c4b356UL, 0x9995bacfUL,
+ 0x0fa5bdb8UL, 0x9eb80228UL, 0x0888055fUL, 0xb2d90cc6UL, 0x24e90bb1UL,
+ 0x877c6f2fUL, 0x114c6858UL, 0xab1d61c1UL, 0x3d2d66b6UL, 0x9041dc76UL,
+ 0x0671db01UL, 0xbc20d298UL, 0x2a10d5efUL, 0x8985b171UL, 0x1fb5b606UL,
+ 0xa5e4bf9fUL, 0x33d4b8e8UL, 0xa2c90778UL, 0x34f9000fUL, 0x8ea80996UL,
+ 0x18980ee1UL, 0xbb0d6a7fUL, 0x2d3d6d08UL, 0x976c6491UL, 0x015c63e6UL,
+ 0xf4516b6bUL, 0x62616c1cUL, 0xd8306585UL, 0x4e0062f2UL, 0xed95066cUL,
+ 0x7ba5011bUL, 0xc1f40882UL, 0x57c40ff5UL, 0xc6d9b065UL, 0x50e9b712UL,
+ 0xeab8be8bUL, 0x7c88b9fcUL, 0xdf1ddd62UL, 0x492dda15UL, 0xf37cd38cUL,
+ 0x654cd4fbUL, 0x5861b24dUL, 0xce51b53aUL, 0x7400bca3UL, 0xe230bbd4UL,
+ 0x41a5df4aUL, 0xd795d83dUL, 0x6dc4d1a4UL, 0xfbf4d6d3UL, 0x6ae96943UL,
+ 0xfcd96e34UL, 0x468867adUL, 0xd0b860daUL, 0x732d0444UL, 0xe51d0333UL,
+ 0x5f4c0aaaUL, 0xc97c0dddUL, 0x3c710550UL, 0xaa410227UL, 0x10100bbeUL,
+ 0x86200cc9UL, 0x25b56857UL, 0xb3856f20UL, 0x09d466b9UL, 0x9fe461ceUL,
+ 0x0ef9de5eUL, 0x98c9d929UL, 0x2298d0b0UL, 0xb4a8d7c7UL, 0x173db359UL,
+ 0x810db42eUL, 0x3b5cbdb7UL, 0xad6cbac0UL, 0x2083b8edUL, 0xb6b3bf9aUL,
+ 0x0ce2b603UL, 0x9ad2b174UL, 0x3947d5eaUL, 0xaf77d29dUL, 0x1526db04UL,
+ 0x8316dc73UL, 0x120b63e3UL, 0x843b6494UL, 0x3e6a6d0dUL, 0xa85a6a7aUL,
+ 0x0bcf0ee4UL, 0x9dff0993UL, 0x27ae000aUL, 0xb19e077dUL, 0x44930ff0UL,
+ 0xd2a30887UL, 0x68f2011eUL, 0xfec20669UL, 0x5d5762f7UL, 0xcb676580UL,
+ 0x71366c19UL, 0xe7066b6eUL, 0x761bd4feUL, 0xe02bd389UL, 0x5a7ada10UL,
+ 0xcc4add67UL, 0x6fdfb9f9UL, 0xf9efbe8eUL, 0x43beb717UL, 0xd58eb060UL,
+ 0xe8a3d6d6UL, 0x7e93d1a1UL, 0xc4c2d838UL, 0x52f2df4fUL, 0xf167bbd1UL,
+ 0x6757bca6UL, 0xdd06b53fUL, 0x4b36b248UL, 0xda2b0dd8UL, 0x4c1b0aafUL,
+ 0xf64a0336UL, 0x607a0441UL, 0xc3ef60dfUL, 0x55df67a8UL, 0xef8e6e31UL,
+ 0x79be6946UL, 0x8cb361cbUL, 0x1a8366bcUL, 0xa0d26f25UL, 0x36e26852UL,
+ 0x95770cccUL, 0x03470bbbUL, 0xb9160222UL, 0x2f260555UL, 0xbe3bbac5UL,
+ 0x280bbdb2UL, 0x925ab42bUL, 0x046ab35cUL, 0xa7ffd7c2UL, 0x31cfd0b5UL,
+ 0x8b9ed92cUL, 0x1daede5bUL, 0xb0c2649bUL, 0x26f263ecUL, 0x9ca36a75UL,
+ 0x0a936d02UL, 0xa906099cUL, 0x3f360eebUL, 0x85670772UL, 0x13570005UL,
+ 0x824abf95UL, 0x147ab8e2UL, 0xae2bb17bUL, 0x381bb60cUL, 0x9b8ed292UL,
+ 0x0dbed5e5UL, 0xb7efdc7cUL, 0x21dfdb0bUL, 0xd4d2d386UL, 0x42e2d4f1UL,
+ 0xf8b3dd68UL, 0x6e83da1fUL, 0xcd16be81UL, 0x5b26b9f6UL, 0xe177b06fUL,
+ 0x7747b718UL, 0xe65a0888UL, 0x706a0fffUL, 0xca3b0666UL, 0x5c0b0111UL,
+ 0xff9e658fUL, 0x69ae62f8UL, 0xd3ff6b61UL, 0x45cf6c16UL, 0x78e20aa0UL,
+ 0xeed20dd7UL, 0x5483044eUL, 0xc2b30339UL, 0x612667a7UL, 0xf71660d0UL,
+ 0x4d476949UL, 0xdb776e3eUL, 0x4a6ad1aeUL, 0xdc5ad6d9UL, 0x660bdf40UL,
+ 0xf03bd837UL, 0x53aebca9UL, 0xc59ebbdeUL, 0x7fcfb247UL, 0xe9ffb530UL,
+ 0x1cf2bdbdUL, 0x8ac2bacaUL, 0x3093b353UL, 0xa6a3b424UL, 0x0536d0baUL,
+ 0x9306d7cdUL, 0x2957de54UL, 0xbf67d923UL, 0x2e7a66b3UL, 0xb84a61c4UL,
+ 0x021b685dUL, 0x942b6f2aUL, 0x37be0bb4UL, 0xa18e0cc3UL, 0x1bdf055aUL,
+ 0x8def022dUL
+ },
+ {+ 0x00000000UL, 0x41311b19UL, 0x82623632UL, 0xc3532d2bUL, 0x04c56c64UL,
+ 0x45f4777dUL, 0x86a75a56UL, 0xc796414fUL, 0x088ad9c8UL, 0x49bbc2d1UL,
+ 0x8ae8effaUL, 0xcbd9f4e3UL, 0x0c4fb5acUL, 0x4d7eaeb5UL, 0x8e2d839eUL,
+ 0xcf1c9887UL, 0x5112c24aUL, 0x1023d953UL, 0xd370f478UL, 0x9241ef61UL,
+ 0x55d7ae2eUL, 0x14e6b537UL, 0xd7b5981cUL, 0x96848305UL, 0x59981b82UL,
+ 0x18a9009bUL, 0xdbfa2db0UL, 0x9acb36a9UL, 0x5d5d77e6UL, 0x1c6c6cffUL,
+ 0xdf3f41d4UL, 0x9e0e5acdUL, 0xa2248495UL, 0xe3159f8cUL, 0x2046b2a7UL,
+ 0x6177a9beUL, 0xa6e1e8f1UL, 0xe7d0f3e8UL, 0x2483dec3UL, 0x65b2c5daUL,
+ 0xaaae5d5dUL, 0xeb9f4644UL, 0x28cc6b6fUL, 0x69fd7076UL, 0xae6b3139UL,
+ 0xef5a2a20UL, 0x2c09070bUL, 0x6d381c12UL, 0xf33646dfUL, 0xb2075dc6UL,
+ 0x715470edUL, 0x30656bf4UL, 0xf7f32abbUL, 0xb6c231a2UL, 0x75911c89UL,
+ 0x34a00790UL, 0xfbbc9f17UL, 0xba8d840eUL, 0x79dea925UL, 0x38efb23cUL,
+ 0xff79f373UL, 0xbe48e86aUL, 0x7d1bc541UL, 0x3c2ade58UL, 0x054f79f0UL,
+ 0x447e62e9UL, 0x872d4fc2UL, 0xc61c54dbUL, 0x018a1594UL, 0x40bb0e8dUL,
+ 0x83e823a6UL, 0xc2d938bfUL, 0x0dc5a038UL, 0x4cf4bb21UL, 0x8fa7960aUL,
+ 0xce968d13UL, 0x0900cc5cUL, 0x4831d745UL, 0x8b62fa6eUL, 0xca53e177UL,
+ 0x545dbbbaUL, 0x156ca0a3UL, 0xd63f8d88UL, 0x970e9691UL, 0x5098d7deUL,
+ 0x11a9ccc7UL, 0xd2fae1ecUL, 0x93cbfaf5UL, 0x5cd76272UL, 0x1de6796bUL,
+ 0xdeb55440UL, 0x9f844f59UL, 0x58120e16UL, 0x1923150fUL, 0xda703824UL,
+ 0x9b41233dUL, 0xa76bfd65UL, 0xe65ae67cUL, 0x2509cb57UL, 0x6438d04eUL,
+ 0xa3ae9101UL, 0xe29f8a18UL, 0x21cca733UL, 0x60fdbc2aUL, 0xafe124adUL,
+ 0xeed03fb4UL, 0x2d83129fUL, 0x6cb20986UL, 0xab2448c9UL, 0xea1553d0UL,
+ 0x29467efbUL, 0x687765e2UL, 0xf6793f2fUL, 0xb7482436UL, 0x741b091dUL,
+ 0x352a1204UL, 0xf2bc534bUL, 0xb38d4852UL, 0x70de6579UL, 0x31ef7e60UL,
+ 0xfef3e6e7UL, 0xbfc2fdfeUL, 0x7c91d0d5UL, 0x3da0cbccUL, 0xfa368a83UL,
+ 0xbb07919aUL, 0x7854bcb1UL, 0x3965a7a8UL, 0x4b98833bUL, 0x0aa99822UL,
+ 0xc9fab509UL, 0x88cbae10UL, 0x4f5def5fUL, 0x0e6cf446UL, 0xcd3fd96dUL,
+ 0x8c0ec274UL, 0x43125af3UL, 0x022341eaUL, 0xc1706cc1UL, 0x804177d8UL,
+ 0x47d73697UL, 0x06e62d8eUL, 0xc5b500a5UL, 0x84841bbcUL, 0x1a8a4171UL,
+ 0x5bbb5a68UL, 0x98e87743UL, 0xd9d96c5aUL, 0x1e4f2d15UL, 0x5f7e360cUL,
+ 0x9c2d1b27UL, 0xdd1c003eUL, 0x120098b9UL, 0x533183a0UL, 0x9062ae8bUL,
+ 0xd153b592UL, 0x16c5f4ddUL, 0x57f4efc4UL, 0x94a7c2efUL, 0xd596d9f6UL,
+ 0xe9bc07aeUL, 0xa88d1cb7UL, 0x6bde319cUL, 0x2aef2a85UL, 0xed796bcaUL,
+ 0xac4870d3UL, 0x6f1b5df8UL, 0x2e2a46e1UL, 0xe136de66UL, 0xa007c57fUL,
+ 0x6354e854UL, 0x2265f34dUL, 0xe5f3b202UL, 0xa4c2a91bUL, 0x67918430UL,
+ 0x26a09f29UL, 0xb8aec5e4UL, 0xf99fdefdUL, 0x3accf3d6UL, 0x7bfde8cfUL,
+ 0xbc6ba980UL, 0xfd5ab299UL, 0x3e099fb2UL, 0x7f3884abUL, 0xb0241c2cUL,
+ 0xf1150735UL, 0x32462a1eUL, 0x73773107UL, 0xb4e17048UL, 0xf5d06b51UL,
+ 0x3683467aUL, 0x77b25d63UL, 0x4ed7facbUL, 0x0fe6e1d2UL, 0xccb5ccf9UL,
+ 0x8d84d7e0UL, 0x4a1296afUL, 0x0b238db6UL, 0xc870a09dUL, 0x8941bb84UL,
+ 0x465d2303UL, 0x076c381aUL, 0xc43f1531UL, 0x850e0e28UL, 0x42984f67UL,
+ 0x03a9547eUL, 0xc0fa7955UL, 0x81cb624cUL, 0x1fc53881UL, 0x5ef42398UL,
+ 0x9da70eb3UL, 0xdc9615aaUL, 0x1b0054e5UL, 0x5a314ffcUL, 0x996262d7UL,
+ 0xd85379ceUL, 0x174fe149UL, 0x567efa50UL, 0x952dd77bUL, 0xd41ccc62UL,
+ 0x138a8d2dUL, 0x52bb9634UL, 0x91e8bb1fUL, 0xd0d9a006UL, 0xecf37e5eUL,
+ 0xadc26547UL, 0x6e91486cUL, 0x2fa05375UL, 0xe836123aUL, 0xa9070923UL,
+ 0x6a542408UL, 0x2b653f11UL, 0xe479a796UL, 0xa548bc8fUL, 0x661b91a4UL,
+ 0x272a8abdUL, 0xe0bccbf2UL, 0xa18dd0ebUL, 0x62defdc0UL, 0x23efe6d9UL,
+ 0xbde1bc14UL, 0xfcd0a70dUL, 0x3f838a26UL, 0x7eb2913fUL, 0xb924d070UL,
+ 0xf815cb69UL, 0x3b46e642UL, 0x7a77fd5bUL, 0xb56b65dcUL, 0xf45a7ec5UL,
+ 0x370953eeUL, 0x763848f7UL, 0xb1ae09b8UL, 0xf09f12a1UL, 0x33cc3f8aUL,
+ 0x72fd2493UL
+ },
+ {+ 0x00000000UL, 0x376ac201UL, 0x6ed48403UL, 0x59be4602UL, 0xdca80907UL,
+ 0xebc2cb06UL, 0xb27c8d04UL, 0x85164f05UL, 0xb851130eUL, 0x8f3bd10fUL,
+ 0xd685970dUL, 0xe1ef550cUL, 0x64f91a09UL, 0x5393d808UL, 0x0a2d9e0aUL,
+ 0x3d475c0bUL, 0x70a3261cUL, 0x47c9e41dUL, 0x1e77a21fUL, 0x291d601eUL,
+ 0xac0b2f1bUL, 0x9b61ed1aUL, 0xc2dfab18UL, 0xf5b56919UL, 0xc8f23512UL,
+ 0xff98f713UL, 0xa626b111UL, 0x914c7310UL, 0x145a3c15UL, 0x2330fe14UL,
+ 0x7a8eb816UL, 0x4de47a17UL, 0xe0464d38UL, 0xd72c8f39UL, 0x8e92c93bUL,
+ 0xb9f80b3aUL, 0x3cee443fUL, 0x0b84863eUL, 0x523ac03cUL, 0x6550023dUL,
+ 0x58175e36UL, 0x6f7d9c37UL, 0x36c3da35UL, 0x01a91834UL, 0x84bf5731UL,
+ 0xb3d59530UL, 0xea6bd332UL, 0xdd011133UL, 0x90e56b24UL, 0xa78fa925UL,
+ 0xfe31ef27UL, 0xc95b2d26UL, 0x4c4d6223UL, 0x7b27a022UL, 0x2299e620UL,
+ 0x15f32421UL, 0x28b4782aUL, 0x1fdeba2bUL, 0x4660fc29UL, 0x710a3e28UL,
+ 0xf41c712dUL, 0xc376b32cUL, 0x9ac8f52eUL, 0xada2372fUL, 0xc08d9a70UL,
+ 0xf7e75871UL, 0xae591e73UL, 0x9933dc72UL, 0x1c259377UL, 0x2b4f5176UL,
+ 0x72f11774UL, 0x459bd575UL, 0x78dc897eUL, 0x4fb64b7fUL, 0x16080d7dUL,
+ 0x2162cf7cUL, 0xa4748079UL, 0x931e4278UL, 0xcaa0047aUL, 0xfdcac67bUL,
+ 0xb02ebc6cUL, 0x87447e6dUL, 0xdefa386fUL, 0xe990fa6eUL, 0x6c86b56bUL,
+ 0x5bec776aUL, 0x02523168UL, 0x3538f369UL, 0x087faf62UL, 0x3f156d63UL,
+ 0x66ab2b61UL, 0x51c1e960UL, 0xd4d7a665UL, 0xe3bd6464UL, 0xba032266UL,
+ 0x8d69e067UL, 0x20cbd748UL, 0x17a11549UL, 0x4e1f534bUL, 0x7975914aUL,
+ 0xfc63de4fUL, 0xcb091c4eUL, 0x92b75a4cUL, 0xa5dd984dUL, 0x989ac446UL,
+ 0xaff00647UL, 0xf64e4045UL, 0xc1248244UL, 0x4432cd41UL, 0x73580f40UL,
+ 0x2ae64942UL, 0x1d8c8b43UL, 0x5068f154UL, 0x67023355UL, 0x3ebc7557UL,
+ 0x09d6b756UL, 0x8cc0f853UL, 0xbbaa3a52UL, 0xe2147c50UL, 0xd57ebe51UL,
+ 0xe839e25aUL, 0xdf53205bUL, 0x86ed6659UL, 0xb187a458UL, 0x3491eb5dUL,
+ 0x03fb295cUL, 0x5a456f5eUL, 0x6d2fad5fUL, 0x801b35e1UL, 0xb771f7e0UL,
+ 0xeecfb1e2UL, 0xd9a573e3UL, 0x5cb33ce6UL, 0x6bd9fee7UL, 0x3267b8e5UL,
+ 0x050d7ae4UL, 0x384a26efUL, 0x0f20e4eeUL, 0x569ea2ecUL, 0x61f460edUL,
+ 0xe4e22fe8UL, 0xd388ede9UL, 0x8a36abebUL, 0xbd5c69eaUL, 0xf0b813fdUL,
+ 0xc7d2d1fcUL, 0x9e6c97feUL, 0xa90655ffUL, 0x2c101afaUL, 0x1b7ad8fbUL,
+ 0x42c49ef9UL, 0x75ae5cf8UL, 0x48e900f3UL, 0x7f83c2f2UL, 0x263d84f0UL,
+ 0x115746f1UL, 0x944109f4UL, 0xa32bcbf5UL, 0xfa958df7UL, 0xcdff4ff6UL,
+ 0x605d78d9UL, 0x5737bad8UL, 0x0e89fcdaUL, 0x39e33edbUL, 0xbcf571deUL,
+ 0x8b9fb3dfUL, 0xd221f5ddUL, 0xe54b37dcUL, 0xd80c6bd7UL, 0xef66a9d6UL,
+ 0xb6d8efd4UL, 0x81b22dd5UL, 0x04a462d0UL, 0x33cea0d1UL, 0x6a70e6d3UL,
+ 0x5d1a24d2UL, 0x10fe5ec5UL, 0x27949cc4UL, 0x7e2adac6UL, 0x494018c7UL,
+ 0xcc5657c2UL, 0xfb3c95c3UL, 0xa282d3c1UL, 0x95e811c0UL, 0xa8af4dcbUL,
+ 0x9fc58fcaUL, 0xc67bc9c8UL, 0xf1110bc9UL, 0x740744ccUL, 0x436d86cdUL,
+ 0x1ad3c0cfUL, 0x2db902ceUL, 0x4096af91UL, 0x77fc6d90UL, 0x2e422b92UL,
+ 0x1928e993UL, 0x9c3ea696UL, 0xab546497UL, 0xf2ea2295UL, 0xc580e094UL,
+ 0xf8c7bc9fUL, 0xcfad7e9eUL, 0x9613389cUL, 0xa179fa9dUL, 0x246fb598UL,
+ 0x13057799UL, 0x4abb319bUL, 0x7dd1f39aUL, 0x3035898dUL, 0x075f4b8cUL,
+ 0x5ee10d8eUL, 0x698bcf8fUL, 0xec9d808aUL, 0xdbf7428bUL, 0x82490489UL,
+ 0xb523c688UL, 0x88649a83UL, 0xbf0e5882UL, 0xe6b01e80UL, 0xd1dadc81UL,
+ 0x54cc9384UL, 0x63a65185UL, 0x3a181787UL, 0x0d72d586UL, 0xa0d0e2a9UL,
+ 0x97ba20a8UL, 0xce0466aaUL, 0xf96ea4abUL, 0x7c78ebaeUL, 0x4b1229afUL,
+ 0x12ac6fadUL, 0x25c6adacUL, 0x1881f1a7UL, 0x2feb33a6UL, 0x765575a4UL,
+ 0x413fb7a5UL, 0xc429f8a0UL, 0xf3433aa1UL, 0xaafd7ca3UL, 0x9d97bea2UL,
+ 0xd073c4b5UL, 0xe71906b4UL, 0xbea740b6UL, 0x89cd82b7UL, 0x0cdbcdb2UL,
+ 0x3bb10fb3UL, 0x620f49b1UL, 0x55658bb0UL, 0x6822d7bbUL, 0x5f4815baUL,
+ 0x06f653b8UL, 0x319c91b9UL, 0xb48adebcUL, 0x83e01cbdUL, 0xda5e5abfUL,
+ 0xed3498beUL
+ },
+ {+ 0x00000000UL, 0x6567bcb8UL, 0x8bc809aaUL, 0xeeafb512UL, 0x5797628fUL,
+ 0x32f0de37UL, 0xdc5f6b25UL, 0xb938d79dUL, 0xef28b4c5UL, 0x8a4f087dUL,
+ 0x64e0bd6fUL, 0x018701d7UL, 0xb8bfd64aUL, 0xddd86af2UL, 0x3377dfe0UL,
+ 0x56106358UL, 0x9f571950UL, 0xfa30a5e8UL, 0x149f10faUL, 0x71f8ac42UL,
+ 0xc8c07bdfUL, 0xada7c767UL, 0x43087275UL, 0x266fcecdUL, 0x707fad95UL,
+ 0x1518112dUL, 0xfbb7a43fUL, 0x9ed01887UL, 0x27e8cf1aUL, 0x428f73a2UL,
+ 0xac20c6b0UL, 0xc9477a08UL, 0x3eaf32a0UL, 0x5bc88e18UL, 0xb5673b0aUL,
+ 0xd00087b2UL, 0x6938502fUL, 0x0c5fec97UL, 0xe2f05985UL, 0x8797e53dUL,
+ 0xd1878665UL, 0xb4e03addUL, 0x5a4f8fcfUL, 0x3f283377UL, 0x8610e4eaUL,
+ 0xe3775852UL, 0x0dd8ed40UL, 0x68bf51f8UL, 0xa1f82bf0UL, 0xc49f9748UL,
+ 0x2a30225aUL, 0x4f579ee2UL, 0xf66f497fUL, 0x9308f5c7UL, 0x7da740d5UL,
+ 0x18c0fc6dUL, 0x4ed09f35UL, 0x2bb7238dUL, 0xc518969fUL, 0xa07f2a27UL,
+ 0x1947fdbaUL, 0x7c204102UL, 0x928ff410UL, 0xf7e848a8UL, 0x3d58149bUL,
+ 0x583fa823UL, 0xb6901d31UL, 0xd3f7a189UL, 0x6acf7614UL, 0x0fa8caacUL,
+ 0xe1077fbeUL, 0x8460c306UL, 0xd270a05eUL, 0xb7171ce6UL, 0x59b8a9f4UL,
+ 0x3cdf154cUL, 0x85e7c2d1UL, 0xe0807e69UL, 0x0e2fcb7bUL, 0x6b4877c3UL,
+ 0xa20f0dcbUL, 0xc768b173UL, 0x29c70461UL, 0x4ca0b8d9UL, 0xf5986f44UL,
+ 0x90ffd3fcUL, 0x7e5066eeUL, 0x1b37da56UL, 0x4d27b90eUL, 0x284005b6UL,
+ 0xc6efb0a4UL, 0xa3880c1cUL, 0x1ab0db81UL, 0x7fd76739UL, 0x9178d22bUL,
+ 0xf41f6e93UL, 0x03f7263bUL, 0x66909a83UL, 0x883f2f91UL, 0xed589329UL,
+ 0x546044b4UL, 0x3107f80cUL, 0xdfa84d1eUL, 0xbacff1a6UL, 0xecdf92feUL,
+ 0x89b82e46UL, 0x67179b54UL, 0x027027ecUL, 0xbb48f071UL, 0xde2f4cc9UL,
+ 0x3080f9dbUL, 0x55e74563UL, 0x9ca03f6bUL, 0xf9c783d3UL, 0x176836c1UL,
+ 0x720f8a79UL, 0xcb375de4UL, 0xae50e15cUL, 0x40ff544eUL, 0x2598e8f6UL,
+ 0x73888baeUL, 0x16ef3716UL, 0xf8408204UL, 0x9d273ebcUL, 0x241fe921UL,
+ 0x41785599UL, 0xafd7e08bUL, 0xcab05c33UL, 0x3bb659edUL, 0x5ed1e555UL,
+ 0xb07e5047UL, 0xd519ecffUL, 0x6c213b62UL, 0x094687daUL, 0xe7e932c8UL,
+ 0x828e8e70UL, 0xd49eed28UL, 0xb1f95190UL, 0x5f56e482UL, 0x3a31583aUL,
+ 0x83098fa7UL, 0xe66e331fUL, 0x08c1860dUL, 0x6da63ab5UL, 0xa4e140bdUL,
+ 0xc186fc05UL, 0x2f294917UL, 0x4a4ef5afUL, 0xf3762232UL, 0x96119e8aUL,
+ 0x78be2b98UL, 0x1dd99720UL, 0x4bc9f478UL, 0x2eae48c0UL, 0xc001fdd2UL,
+ 0xa566416aUL, 0x1c5e96f7UL, 0x79392a4fUL, 0x97969f5dUL, 0xf2f123e5UL,
+ 0x05196b4dUL, 0x607ed7f5UL, 0x8ed162e7UL, 0xebb6de5fUL, 0x528e09c2UL,
+ 0x37e9b57aUL, 0xd9460068UL, 0xbc21bcd0UL, 0xea31df88UL, 0x8f566330UL,
+ 0x61f9d622UL, 0x049e6a9aUL, 0xbda6bd07UL, 0xd8c101bfUL, 0x366eb4adUL,
+ 0x53090815UL, 0x9a4e721dUL, 0xff29cea5UL, 0x11867bb7UL, 0x74e1c70fUL,
+ 0xcdd91092UL, 0xa8beac2aUL, 0x46111938UL, 0x2376a580UL, 0x7566c6d8UL,
+ 0x10017a60UL, 0xfeaecf72UL, 0x9bc973caUL, 0x22f1a457UL, 0x479618efUL,
+ 0xa939adfdUL, 0xcc5e1145UL, 0x06ee4d76UL, 0x6389f1ceUL, 0x8d2644dcUL,
+ 0xe841f864UL, 0x51792ff9UL, 0x341e9341UL, 0xdab12653UL, 0xbfd69aebUL,
+ 0xe9c6f9b3UL, 0x8ca1450bUL, 0x620ef019UL, 0x07694ca1UL, 0xbe519b3cUL,
+ 0xdb362784UL, 0x35999296UL, 0x50fe2e2eUL, 0x99b95426UL, 0xfcdee89eUL,
+ 0x12715d8cUL, 0x7716e134UL, 0xce2e36a9UL, 0xab498a11UL, 0x45e63f03UL,
+ 0x208183bbUL, 0x7691e0e3UL, 0x13f65c5bUL, 0xfd59e949UL, 0x983e55f1UL,
+ 0x2106826cUL, 0x44613ed4UL, 0xaace8bc6UL, 0xcfa9377eUL, 0x38417fd6UL,
+ 0x5d26c36eUL, 0xb389767cUL, 0xd6eecac4UL, 0x6fd61d59UL, 0x0ab1a1e1UL,
+ 0xe41e14f3UL, 0x8179a84bUL, 0xd769cb13UL, 0xb20e77abUL, 0x5ca1c2b9UL,
+ 0x39c67e01UL, 0x80fea99cUL, 0xe5991524UL, 0x0b36a036UL, 0x6e511c8eUL,
+ 0xa7166686UL, 0xc271da3eUL, 0x2cde6f2cUL, 0x49b9d394UL, 0xf0810409UL,
+ 0x95e6b8b1UL, 0x7b490da3UL, 0x1e2eb11bUL, 0x483ed243UL, 0x2d596efbUL,
+ 0xc3f6dbe9UL, 0xa6916751UL, 0x1fa9b0ccUL, 0x7ace0c74UL, 0x9461b966UL,
+ 0xf10605deUL
+#endif
+ }
+};
--- /dev/null
+++ b/src/gfx/zlib/deflate.c
@@ -1,0 +1,1456 @@
+/* deflate.c -- compress data using the deflation algorithm
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/*
+ * ALGORITHM
+ *
+ * The "deflation" process depends on being able to identify portions
+ * of the input text which are identical to earlier input (within a
+ * sliding window trailing behind the input currently being processed).
+ *
+ * The most straightforward technique turns out to be the fastest for
+ * most input files: try all possible matches and select the longest.
+ * The key feature of this algorithm is that insertions into the string
+ * dictionary are very simple and thus fast, and deletions are avoided
+ * completely. Insertions are performed at each input character, whereas
+ * string matches are performed only when the previous match ends. So it
+ * is preferable to spend more time in matches to allow very fast string
+ * insertions and avoid deletions. The matching algorithm for small
+ * strings is inspired from that of Rabin & Karp. A brute force approach
+ * is used to find longer strings when a small match has been found.
+ * A similar algorithm is used in comic (by Jan-Mark Wams) and freeze
+ * (by Leonid Broukhis).
+ * A previous version of this file used a more sophisticated algorithm
+ * (by Fiala and Greene) which is guaranteed to run in linear amortized
+ * time, but has a larger average cost, uses more memory and is patented.
+ * However the F&G algorithm may be faster for some highly redundant
+ * files if the parameter max_chain_length (described below) is too large.
+ *
+ * ACKNOWLEDGEMENTS
+ *
+ * The idea of lazy evaluation of matches is due to Jan-Mark Wams, and
+ * I found it in 'freeze' written by Leonid Broukhis.
+ * Thanks to many people for bug reports and testing.
+ *
+ * REFERENCES
+ *
+ * Deutsch, L.P.,"DEFLATE Compressed Data Format Specification".
+ * Available in http://www.ietf.org/rfc/rfc1951.txt
+ *
+ * A description of the Rabin and Karp algorithm is given in the book
+ * "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
+ *
+ * Fiala,E.R., and Greene,D.H.
+ * Data Compression with Finite Windows, Comm.ACM, 32,4 (1989) 490-595
+ *
+ */
+
+/* @(#) $Id: deflate.c,v 1.1.1.1 2005/04/24 21:39:40 giles Exp $ */
+
+#include "deflate.h"
+
+const char deflate_copyright[] =
+ " deflate 1.2.2 Copyright 1995-2004 Jean-loup Gailly ";
+/*
+ If you use the zlib library in a product, an acknowledgment is welcome
+ in the documentation of your product. If for some reason you cannot
+ include such an acknowledgment, I would appreciate that you keep this
+ copyright string in the executable of your product.
+ */
+
+/* ===========================================================================
+ * Function prototypes.
+ */
+typedef enum {+ need_more, /* block not completed, need more input or more output */
+ block_done, /* block flush performed */
+ finish_started, /* finish started, need only more output at next deflate */
+ finish_done /* finish done, accept no more input or output */
+} block_state;
+
+typedef block_state (*compress_func) OF((deflate_state *s, int flush));
+/* Compression function. Returns the block state after the call. */
+
+local void fill_window OF((deflate_state *s));
+local block_state deflate_stored OF((deflate_state *s, int flush));
+local block_state deflate_fast OF((deflate_state *s, int flush));
+#ifndef FASTEST
+local block_state deflate_slow OF((deflate_state *s, int flush));
+#endif
+local void lm_init OF((deflate_state *s));
+local void putShortMSB OF((deflate_state *s, uInt b));
+local void flush_pending OF((z_streamp strm));
+local int read_buf OF((z_streamp strm, Bytef *buf, unsigned size));
+#ifndef FASTEST
+#ifdef ASMV
+ void match_init OF((void)); /* asm code initialization */
+ uInt longest_match OF((deflate_state *s, IPos cur_match));
+#else
+local uInt longest_match OF((deflate_state *s, IPos cur_match));
+#endif
+#endif
+local uInt longest_match_fast OF((deflate_state *s, IPos cur_match));
+
+#ifdef DEBUG
+local void check_match OF((deflate_state *s, IPos start, IPos match,
+ int length));
+#endif
+
+/* ===========================================================================
+ * Local data
+ */
+
+#define NIL 0
+/* Tail of hash chains */
+
+#ifndef TOO_FAR
+# define TOO_FAR 4096
+#endif
+/* Matches of length 3 are discarded if their distance exceeds TOO_FAR */
+
+#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
+/* Minimum amount of lookahead, except at the end of the input file.
+ * See deflate.c for comments about the MIN_MATCH+1.
+ */
+
+/* Values for max_lazy_match, good_match and max_chain_length, depending on
+ * the desired pack level (0..9). The values given below have been tuned to
+ * exclude worst case performance for pathological files. Better values may be
+ * found for specific files.
+ */
+typedef struct config_s {+ ush good_length; /* reduce lazy search above this match length */
+ ush max_lazy; /* do not perform lazy search above this match length */
+ ush nice_length; /* quit search above this match length */
+ ush max_chain;
+ compress_func func;
+} config;
+
+#ifdef FASTEST
+local const config configuration_table[2] = {+/* good lazy nice chain */
+/* 0 */ {0, 0, 0, 0, deflate_stored}, /* store only */+/* 1 */ {4, 4, 8, 4, deflate_fast}}; /* max speed, no lazy matches */+#else
+local const config configuration_table[10] = {+/* good lazy nice chain */
+/* 0 */ {0, 0, 0, 0, deflate_stored}, /* store only */+/* 1 */ {4, 4, 8, 4, deflate_fast}, /* max speed, no lazy matches */+/* 2 */ {4, 5, 16, 8, deflate_fast},+/* 3 */ {4, 6, 32, 32, deflate_fast},+
+/* 4 */ {4, 4, 16, 16, deflate_slow}, /* lazy matches */+/* 5 */ {8, 16, 32, 32, deflate_slow},+/* 6 */ {8, 16, 128, 128, deflate_slow},+/* 7 */ {8, 32, 128, 256, deflate_slow},+/* 8 */ {32, 128, 258, 1024, deflate_slow},+/* 9 */ {32, 258, 258, 4096, deflate_slow}}; /* max compression */+#endif
+
+/* Note: the deflate() code requires max_lazy >= MIN_MATCH and max_chain >= 4
+ * For deflate_fast() (levels <= 3) good is ignored and lazy has a different
+ * meaning.
+ */
+
+#define EQUAL 0
+/* result of memcmp for equal strings */
+
+#ifndef NO_DUMMY_DECL
+struct static_tree_desc_s {int dummy;}; /* for buggy compilers */+#endif
+
+/* ===========================================================================
+ * Update a hash value with the given input byte
+ * IN assertion: all calls to to UPDATE_HASH are made with consecutive
+ * input characters, so that a running hash key can be computed from the
+ * previous key instead of complete recalculation each time.
+ */
+#define UPDATE_HASH(s,h,c) (h = (((h)<<s->hash_shift) ^ (c)) & s->hash_mask)
+
+
+/* ===========================================================================
+ * Insert string str in the dictionary and set match_head to the previous head
+ * of the hash chain (the most recent string with same hash key). Return
+ * the previous length of the hash chain.
+ * If this file is compiled with -DFASTEST, the compression level is forced
+ * to 1, and no hash chains are maintained.
+ * IN assertion: all calls to to INSERT_STRING are made with consecutive
+ * input characters and the first MIN_MATCH bytes of str are valid
+ * (except for the last MIN_MATCH-1 bytes of the input file).
+ */
+#ifdef FASTEST
+#define INSERT_STRING(s, str, match_head) \
+ (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
+ match_head = s->head[s->ins_h], \
+ s->head[s->ins_h] = (Pos)(str))
+#else
+#define INSERT_STRING(s, str, match_head) \
+ (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
+ match_head = s->prev[(str) & s->w_mask] = s->head[s->ins_h], \
+ s->head[s->ins_h] = (Pos)(str))
+#endif
+
+/* ===========================================================================
+ * Initialize the hash table (avoiding 64K overflow for 16 bit systems).
+ * prev[] will be initialized on the fly.
+ */
+#define CLEAR_HASH(s) \
+ s->head[s->hash_size-1] = NIL; \
+ zmemzero((Bytef *)s->head, (unsigned)(s->hash_size-1)*sizeof(*s->head));
+
+/* ========================================================================= */
+int ZEXPORT deflateInit_(z_streamp strm, int level, const char *version, int stream_size)
+{+ return deflateInit2_(strm, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL,
+ Z_DEFAULT_STRATEGY, version, stream_size);
+ /* To do: ignore strm->next_in if we use it as window */
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateInit2_(z_streamp strm, int level, int method, int windowBits, int memLevel, int strategy,
+ const char *version, int stream_size)
+{+ deflate_state *s;
+ int wrap = 1;
+ static const char my_version[] = ZLIB_VERSION;
+
+ ushf *overlay;
+ /* We overlay pending_buf and d_buf+l_buf. This works since the average
+ * output size for (length,distance) codes is <= 24 bits.
+ */
+
+ if (version == Z_NULL || version[0] != my_version[0] ||
+ stream_size != sizeof(z_stream)) {+ return Z_VERSION_ERROR;
+ }
+ if (strm == Z_NULL) return Z_STREAM_ERROR;
+
+ strm->msg = Z_NULL;
+ if (strm->zalloc == (alloc_func)0) {+ strm->zalloc = zcalloc;
+ strm->opaque = (voidpf)0;
+ }
+ if (strm->zfree == (free_func)0) strm->zfree = zcfree;
+
+#ifdef FASTEST
+ if (level != 0) level = 1;
+#else
+ if (level == Z_DEFAULT_COMPRESSION) level = 6;
+#endif
+
+ if (windowBits < 0) { /* suppress zlib wrapper */+ wrap = 0;
+ windowBits = -windowBits;
+ }
+#ifdef GZIP
+ else if (windowBits > 15) {+ wrap = 2; /* write gzip wrapper instead */
+ windowBits -= 16;
+ }
+#endif
+ if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||
+ windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
+ strategy < 0 || strategy > Z_RLE) {+ return Z_STREAM_ERROR;
+ }
+ if (windowBits == 8) windowBits = 9; /* until 256-byte window bug fixed */
+ s = (deflate_state *) ZALLOC(strm, 1, sizeof(deflate_state));
+ if (s == Z_NULL) return Z_MEM_ERROR;
+ strm->state = (struct internal_state FAR *)s;
+ s->strm = strm;
+
+ s->wrap = wrap;
+ s->w_bits = windowBits;
+ s->w_size = 1 << s->w_bits;
+ s->w_mask = s->w_size - 1;
+
+ s->hash_bits = memLevel + 7;
+ s->hash_size = 1 << s->hash_bits;
+ s->hash_mask = s->hash_size - 1;
+ s->hash_shift = ((s->hash_bits+MIN_MATCH-1)/MIN_MATCH);
+
+ s->window = (Bytef *) ZALLOC(strm, s->w_size, 2*sizeof(Byte));
+ s->prev = (Posf *) ZALLOC(strm, s->w_size, sizeof(Pos));
+ s->head = (Posf *) ZALLOC(strm, s->hash_size, sizeof(Pos));
+
+ s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */
+
+ overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
+ s->pending_buf = (uchf *) overlay;
+ s->pending_buf_size = (ulg)s->lit_bufsize * (sizeof(ush)+2L);
+
+ if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
+ s->pending_buf == Z_NULL) {+ s->status = FINISH_STATE;
+ strm->msg = (char*)ERR_MSG(Z_MEM_ERROR);
+ deflateEnd (strm);
+ return Z_MEM_ERROR;
+ }
+ s->d_buf = overlay + s->lit_bufsize/sizeof(ush);
+ s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;
+
+ s->level = level;
+ s->strategy = strategy;
+ s->method = (Byte)method;
+
+ return deflateReset(strm);
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
+ z_streamp strm;
+ const Bytef *dictionary;
+ uInt dictLength;
+{+ deflate_state *s;
+ uInt length = dictLength;
+ uInt n;
+ IPos hash_head = 0;
+
+ if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL ||
+ strm->state->wrap == 2 ||
+ (strm->state->wrap == 1 && strm->state->status != INIT_STATE))
+ return Z_STREAM_ERROR;
+
+ s = strm->state;
+ if (s->wrap)
+ strm->adler = adler32(strm->adler, dictionary, dictLength);
+
+ if (length < MIN_MATCH) return Z_OK;
+ if (length > MAX_DIST(s)) {+ length = MAX_DIST(s);
+#ifndef USE_DICT_HEAD
+ dictionary += dictLength - length; /* use the tail of the dictionary */
+#endif
+ }
+ zmemcpy(s->window, dictionary, length);
+ s->strstart = length;
+ s->block_start = (long)length;
+
+ /* Insert all strings in the hash table (except for the last two bytes).
+ * s->lookahead stays null, so s->ins_h will be recomputed at the next
+ * call of fill_window.
+ */
+ s->ins_h = s->window[0];
+ UPDATE_HASH(s, s->ins_h, s->window[1]);
+ for (n = 0; n <= length - MIN_MATCH; n++) {+ INSERT_STRING(s, n, hash_head);
+ }
+ if (hash_head) hash_head = 0; /* to make compiler happy */
+ return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateReset (strm)
+ z_streamp strm;
+{+ deflate_state *s;
+
+ if (strm == Z_NULL || strm->state == Z_NULL ||
+ strm->zalloc == (alloc_func)0 || strm->zfree == (free_func)0) {+ return Z_STREAM_ERROR;
+ }
+
+ strm->total_in = strm->total_out = 0;
+ strm->msg = Z_NULL; /* use zfree if we ever allocate msg dynamically */
+ strm->data_type = Z_UNKNOWN;
+
+ s = (deflate_state *)strm->state;
+ s->pending = 0;
+ s->pending_out = s->pending_buf;
+
+ if (s->wrap < 0) {+ s->wrap = -s->wrap; /* was made negative by deflate(..., Z_FINISH); */
+ }
+ s->status = s->wrap ? INIT_STATE : BUSY_STATE;
+ strm->adler =
+#ifdef GZIP
+ s->wrap == 2 ? crc32(0L, Z_NULL, 0) :
+#endif
+ adler32(0L, Z_NULL, 0);
+ s->last_flush = Z_NO_FLUSH;
+
+ _tr_init(s);
+ lm_init(s);
+
+ return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflatePrime (z_streamp strm, int bits, int value)
+{+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ strm->state->bi_valid = bits;
+ strm->state->bi_buf = (ush)(value & ((1 << bits) - 1));
+ return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateParams(z_streamp strm, int level, int strategy)
+{+ deflate_state *s;
+ compress_func func;
+ int err = Z_OK;
+
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ s = strm->state;
+
+#ifdef FASTEST
+ if (level != 0) level = 1;
+#else
+ if (level == Z_DEFAULT_COMPRESSION) level = 6;
+#endif
+ if (level < 0 || level > 9 || strategy < 0 || strategy > Z_RLE) {+ return Z_STREAM_ERROR;
+ }
+ func = configuration_table[s->level].func;
+
+ if (func != configuration_table[level].func && strm->total_in != 0) {+ /* Flush the last buffer: */
+ err = deflate(strm, Z_PARTIAL_FLUSH);
+ }
+ if (s->level != level) {+ s->level = level;
+ s->max_lazy_match = configuration_table[level].max_lazy;
+ s->good_match = configuration_table[level].good_length;
+ s->nice_match = configuration_table[level].nice_length;
+ s->max_chain_length = configuration_table[level].max_chain;
+ }
+ s->strategy = strategy;
+ return err;
+}
+
+/* =========================================================================
+ * For the default windowBits of 15 and memLevel of 8, this function returns
+ * a close to exact, as well as small, upper bound on the compressed size.
+ * They are coded as constants here for a reason--if the #define's are
+ * changed, then this function needs to be changed as well. The return
+ * value for 15 and 8 only works for those exact settings.
+ *
+ * For any setting other than those defaults for windowBits and memLevel,
+ * the value returned is a conservative worst case for the maximum expansion
+ * resulting from using fixed blocks instead of stored blocks, which deflate
+ * can emit on compressed data for some combinations of the parameters.
+ *
+ * This function could be more sophisticated to provide closer upper bounds
+ * for every combination of windowBits and memLevel, as well as wrap.
+ * But even the conservative upper bound of about 14% expansion does not
+ * seem onerous for output buffer allocation.
+ */
+uLong ZEXPORT deflateBound(z_streamp strm, uLong sourceLen)
+{+ deflate_state *s;
+ uLong destLen;
+
+ /* conservative upper bound */
+ destLen = sourceLen +
+ ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 11;
+
+ /* if can't get parameters, return conservative bound */
+ if (strm == Z_NULL || strm->state == Z_NULL)
+ return destLen;
+
+ /* if not default parameters, return conservative bound */
+ s = strm->state;
+ if (s->w_bits != 15 || s->hash_bits != 8 + 7)
+ return destLen;
+
+ /* default settings: return tight bound for that case */
+ return compressBound(sourceLen);
+}
+
+/* =========================================================================
+ * Put a short in the pending buffer. The 16-bit value is put in MSB order.
+ * IN assertion: the stream state is correct and there is enough room in
+ * pending_buf.
+ */
+local void putShortMSB (deflate_state *s, uInt b)
+{+ put_byte(s, (Byte)(b >> 8));
+ put_byte(s, (Byte)(b & 0xff));
+}
+
+/* =========================================================================
+ * Flush as much pending output as possible. All deflate() output goes
+ * through this function so some applications may wish to modify it
+ * to avoid allocating a large strm->next_out buffer and copying into it.
+ * (See also read_buf()).
+ */
+local void flush_pending(z_streamp strm)
+{+ unsigned len = strm->state->pending;
+
+ if (len > strm->avail_out) len = strm->avail_out;
+ if (len == 0) return;
+
+ zmemcpy(strm->next_out, strm->state->pending_out, len);
+ strm->next_out += len;
+ strm->state->pending_out += len;
+ strm->total_out += len;
+ strm->avail_out -= len;
+ strm->state->pending -= len;
+ if (strm->state->pending == 0) {+ strm->state->pending_out = strm->state->pending_buf;
+ }
+}
+
+/* ========================================================================= */
+int ZEXPORT deflate (z_streamp strm, int flush)
+{+ int old_flush; /* value of flush param for previous deflate call */
+ deflate_state *s;
+
+ if (strm == Z_NULL || strm->state == Z_NULL ||
+ flush > Z_FINISH || flush < 0) {+ return Z_STREAM_ERROR;
+ }
+ s = strm->state;
+
+ if (strm->next_out == Z_NULL ||
+ (strm->next_in == Z_NULL && strm->avail_in != 0) ||
+ (s->status == FINISH_STATE && flush != Z_FINISH)) {+ ERR_RETURN(strm, Z_STREAM_ERROR);
+ }
+ if (strm->avail_out == 0) ERR_RETURN(strm, Z_BUF_ERROR);
+
+ s->strm = strm; /* just in case */
+ old_flush = s->last_flush;
+ s->last_flush = flush;
+
+ /* Write the header */
+ if (s->status == INIT_STATE) {+#ifdef GZIP
+ if (s->wrap == 2) {+ put_byte(s, 31);
+ put_byte(s, 139);
+ put_byte(s, 8);
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, s->level == 9 ? 2 :
+ (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
+ 4 : 0));
+ put_byte(s, 255);
+ s->status = BUSY_STATE;
+ strm->adler = crc32(0L, Z_NULL, 0);
+ }
+ else
+#endif
+ {+ uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8;
+ uInt level_flags;
+
+ if (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2)
+ level_flags = 0;
+ else if (s->level < 6)
+ level_flags = 1;
+ else if (s->level == 6)
+ level_flags = 2;
+ else
+ level_flags = 3;
+ header |= (level_flags << 6);
+ if (s->strstart != 0) header |= PRESET_DICT;
+ header += 31 - (header % 31);
+
+ s->status = BUSY_STATE;
+ putShortMSB(s, header);
+
+ /* Save the adler32 of the preset dictionary: */
+ if (s->strstart != 0) {+ putShortMSB(s, (uInt)(strm->adler >> 16));
+ putShortMSB(s, (uInt)(strm->adler & 0xffff));
+ }
+ strm->adler = adler32(0L, Z_NULL, 0);
+ }
+ }
+
+ /* Flush as much pending output as possible */
+ if (s->pending != 0) {+ flush_pending(strm);
+ if (strm->avail_out == 0) {+ /* Since avail_out is 0, deflate will be called again with
+ * more output space, but possibly with both pending and
+ * avail_in equal to zero. There won't be anything to do,
+ * but this is not an error situation so make sure we
+ * return OK instead of BUF_ERROR at next call of deflate:
+ */
+ s->last_flush = -1;
+ return Z_OK;
+ }
+
+ /* Make sure there is something to do and avoid duplicate consecutive
+ * flushes. For repeated and useless calls with Z_FINISH, we keep
+ * returning Z_STREAM_END instead of Z_BUF_ERROR.
+ */
+ } else if (strm->avail_in == 0 && flush <= old_flush &&
+ flush != Z_FINISH) {+ ERR_RETURN(strm, Z_BUF_ERROR);
+ }
+
+ /* User must not provide more input after the first FINISH: */
+ if (s->status == FINISH_STATE && strm->avail_in != 0) {+ ERR_RETURN(strm, Z_BUF_ERROR);
+ }
+
+ /* Start a new block or continue the current one.
+ */
+ if (strm->avail_in != 0 || s->lookahead != 0 ||
+ (flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {+ block_state bstate;
+
+ bstate = (*(configuration_table[s->level].func))(s, flush);
+
+ if (bstate == finish_started || bstate == finish_done) {+ s->status = FINISH_STATE;
+ }
+ if (bstate == need_more || bstate == finish_started) {+ if (strm->avail_out == 0) {+ s->last_flush = -1; /* avoid BUF_ERROR next call, see above */
+ }
+ return Z_OK;
+ /* If flush != Z_NO_FLUSH && avail_out == 0, the next call
+ * of deflate should use the same flush parameter to make sure
+ * that the flush is complete. So we don't have to output an
+ * empty block here, this will be done at next call. This also
+ * ensures that for a very small output buffer, we emit at most
+ * one empty block.
+ */
+ }
+ if (bstate == block_done) {+ if (flush == Z_PARTIAL_FLUSH) {+ _tr_align(s);
+ } else { /* FULL_FLUSH or SYNC_FLUSH */+ _tr_stored_block(s, (char*)0, 0L, 0);
+ /* For a full flush, this empty block will be recognized
+ * as a special marker by inflate_sync().
+ */
+ if (flush == Z_FULL_FLUSH) {+ CLEAR_HASH(s); /* forget history */
+ }
+ }
+ flush_pending(strm);
+ if (strm->avail_out == 0) {+ s->last_flush = -1; /* avoid BUF_ERROR at next call, see above */
+ return Z_OK;
+ }
+ }
+ }
+ Assert(strm->avail_out > 0, "bug2");
+
+ if (flush != Z_FINISH) return Z_OK;
+ if (s->wrap <= 0) return Z_STREAM_END;
+
+ /* Write the trailer */
+#ifdef GZIP
+ if (s->wrap == 2) {+ put_byte(s, (Byte)(strm->adler & 0xff));
+ put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
+ put_byte(s, (Byte)((strm->adler >> 16) & 0xff));
+ put_byte(s, (Byte)((strm->adler >> 24) & 0xff));
+ put_byte(s, (Byte)(strm->total_in & 0xff));
+ put_byte(s, (Byte)((strm->total_in >> 8) & 0xff));
+ put_byte(s, (Byte)((strm->total_in >> 16) & 0xff));
+ put_byte(s, (Byte)((strm->total_in >> 24) & 0xff));
+ }
+ else
+#endif
+ {+ putShortMSB(s, (uInt)(strm->adler >> 16));
+ putShortMSB(s, (uInt)(strm->adler & 0xffff));
+ }
+ flush_pending(strm);
+ /* If avail_out is zero, the application will call deflate again
+ * to flush the rest.
+ */
+ if (s->wrap > 0) s->wrap = -s->wrap; /* write the trailer only once! */
+ return s->pending != 0 ? Z_OK : Z_STREAM_END;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateEnd (z_streamp strm)
+{+ int status;
+
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+
+ status = strm->state->status;
+ if (status != INIT_STATE && status != BUSY_STATE &&
+ status != FINISH_STATE) {+ return Z_STREAM_ERROR;
+ }
+
+ /* Deallocate in reverse order of allocations: */
+ TRY_FREE(strm, strm->state->pending_buf);
+ TRY_FREE(strm, strm->state->head);
+ TRY_FREE(strm, strm->state->prev);
+ TRY_FREE(strm, strm->state->window);
+
+ ZFREE(strm, strm->state);
+ strm->state = Z_NULL;
+
+ return status == BUSY_STATE ? Z_DATA_ERROR : Z_OK;
+}
+
+/* =========================================================================
+ * Copy the source state to the destination state.
+ * To simplify the source, this is not supported for 16-bit MSDOS (which
+ * doesn't have enough memory anyway to duplicate compression states).
+ */
+int ZEXPORT deflateCopy (z_streamp dest, z_streamp source)
+{+#ifdef MAXSEG_64K
+ return Z_STREAM_ERROR;
+#else
+ deflate_state *ds;
+ deflate_state *ss;
+ ushf *overlay;
+
+
+ if (source == Z_NULL || dest == Z_NULL || source->state == Z_NULL) {+ return Z_STREAM_ERROR;
+ }
+
+ ss = source->state;
+
+ *dest = *source;
+
+ ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state));
+ if (ds == Z_NULL) return Z_MEM_ERROR;
+ dest->state = (struct internal_state FAR *) ds;
+ *ds = *ss;
+ ds->strm = dest;
+
+ ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
+ ds->prev = (Posf *) ZALLOC(dest, ds->w_size, sizeof(Pos));
+ ds->head = (Posf *) ZALLOC(dest, ds->hash_size, sizeof(Pos));
+ overlay = (ushf *) ZALLOC(dest, ds->lit_bufsize, sizeof(ush)+2);
+ ds->pending_buf = (uchf *) overlay;
+
+ if (ds->window == Z_NULL || ds->prev == Z_NULL || ds->head == Z_NULL ||
+ ds->pending_buf == Z_NULL) {+ deflateEnd (dest);
+ return Z_MEM_ERROR;
+ }
+ /* following zmemcpy do not work for 16-bit MSDOS */
+ zmemcpy(ds->window, ss->window, ds->w_size * 2 * sizeof(Byte));
+ zmemcpy(ds->prev, ss->prev, ds->w_size * sizeof(Pos));
+ zmemcpy(ds->head, ss->head, ds->hash_size * sizeof(Pos));
+ zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);
+
+ ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);
+ ds->d_buf = overlay + ds->lit_bufsize/sizeof(ush);
+ ds->l_buf = ds->pending_buf + (1+sizeof(ush))*ds->lit_bufsize;
+
+ ds->l_desc.dyn_tree = ds->dyn_ltree;
+ ds->d_desc.dyn_tree = ds->dyn_dtree;
+ ds->bl_desc.dyn_tree = ds->bl_tree;
+
+ return Z_OK;
+#endif /* MAXSEG_64K */
+}
+
+/* ===========================================================================
+ * Read a new buffer from the current input stream, update the adler32
+ * and total number of bytes read. All deflate() input goes through
+ * this function so some applications may wish to modify it to avoid
+ * allocating a large strm->next_in buffer and copying from it.
+ * (See also flush_pending()).
+ */
+local int read_buf(z_streamp strm, Bytef *buf, unsigned size)
+{+ unsigned len = strm->avail_in;
+
+ if (len > size) len = size;
+ if (len == 0) return 0;
+
+ strm->avail_in -= len;
+
+ if (strm->state->wrap == 1) {+ strm->adler = adler32(strm->adler, strm->next_in, len);
+ }
+#ifdef GZIP
+ else if (strm->state->wrap == 2) {+ strm->adler = crc32(strm->adler, strm->next_in, len);
+ }
+#endif
+ zmemcpy(buf, strm->next_in, len);
+ strm->next_in += len;
+ strm->total_in += len;
+
+ return (int)len;
+}
+
+/* ===========================================================================
+ * Initialize the "longest match" routines for a new zlib stream
+ */
+local void lm_init (deflate_state *s)
+{+ s->window_size = (ulg)2L*s->w_size;
+
+ CLEAR_HASH(s);
+
+ /* Set the default configuration parameters:
+ */
+ s->max_lazy_match = configuration_table[s->level].max_lazy;
+ s->good_match = configuration_table[s->level].good_length;
+ s->nice_match = configuration_table[s->level].nice_length;
+ s->max_chain_length = configuration_table[s->level].max_chain;
+
+ s->strstart = 0;
+ s->block_start = 0L;
+ s->lookahead = 0;
+ s->match_length = s->prev_length = MIN_MATCH-1;
+ s->match_available = 0;
+ s->ins_h = 0;
+#ifdef ASMV
+ match_init(); /* initialize the asm code */
+#endif
+}
+
+#ifndef FASTEST
+/* ===========================================================================
+ * Set match_start to the longest match starting at the given string and
+ * return its length. Matches shorter or equal to prev_length are discarded,
+ * in which case the result is equal to prev_length and match_start is
+ * garbage.
+ * IN assertions: cur_match is the head of the hash chain for the current
+ * string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
+ * OUT assertion: the match length is not greater than s->lookahead.
+ */
+#ifndef ASMV
+/* For 80x86 and 680x0, an optimized version will be provided in match.asm or
+ * match.S. The code will be functionally equivalent.
+ */
+local uInt longest_match(deflate_state *s, IPos cur_match)
+{+ unsigned chain_length = s->max_chain_length;/* max hash chain length */
+ register Bytef *scan = s->window + s->strstart; /* current string */
+ register Bytef *match; /* matched string */
+ register int len; /* length of current match */
+ int best_len = s->prev_length; /* best match length so far */
+ int nice_match = s->nice_match; /* stop if match long enough */
+ IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
+ s->strstart - (IPos)MAX_DIST(s) : NIL;
+ /* Stop when cur_match becomes <= limit. To simplify the code,
+ * we prevent matches with the string of window index 0.
+ */
+ Posf *prev = s->prev;
+ uInt wmask = s->w_mask;
+
+#ifdef UNALIGNED_OK
+ /* Compare two bytes at a time. Note: this is not always beneficial.
+ * Try with and without -DUNALIGNED_OK to check.
+ */
+ register Bytef *strend = s->window + s->strstart + MAX_MATCH - 1;
+ register ush scan_start = *(ushf*)scan;
+ register ush scan_end = *(ushf*)(scan+best_len-1);
+#else
+ register Bytef *strend = s->window + s->strstart + MAX_MATCH;
+ register Byte scan_end1 = scan[best_len-1];
+ register Byte scan_end = scan[best_len];
+#endif
+
+ /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
+ * It is easy to get rid of this optimization if necessary.
+ */
+ Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
+
+ /* Do not waste too much time if we already have a good match: */
+ if (s->prev_length >= s->good_match) {+ chain_length >>= 2;
+ }
+ /* Do not look for matches beyond the end of the input. This is necessary
+ * to make deflate deterministic.
+ */
+ if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
+
+ Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
+
+ do {+ Assert(cur_match < s->strstart, "no future");
+ match = s->window + cur_match;
+
+ /* Skip to next match if the match length cannot increase
+ * or if the match length is less than 2:
+ */
+#if (defined(UNALIGNED_OK) && MAX_MATCH == 258)
+ /* This code assumes sizeof(unsigned short) == 2. Do not use
+ * UNALIGNED_OK if your compiler uses a different size.
+ */
+ if (*(ushf*)(match+best_len-1) != scan_end ||
+ *(ushf*)match != scan_start) continue;
+
+ /* It is not necessary to compare scan[2] and match[2] since they are
+ * always equal when the other bytes match, given that the hash keys
+ * are equal and that HASH_BITS >= 8. Compare 2 bytes at a time at
+ * strstart+3, +5, ... up to strstart+257. We check for insufficient
+ * lookahead only every 4th comparison; the 128th check will be made
+ * at strstart+257. If MAX_MATCH-2 is not a multiple of 8, it is
+ * necessary to put more guard bytes at the end of the window, or
+ * to check more often for insufficient lookahead.
+ */
+ Assert(scan[2] == match[2], "scan[2]?");
+ scan++, match++;
+ do {+ } while (*(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+ *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+ *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+ *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+ scan < strend);
+ /* The funny "do {}" generates better code on most compilers */+
+ /* Here, scan <= window+strstart+257 */
+ Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+ if (*scan == *match) scan++;
+
+ len = (MAX_MATCH - 1) - (int)(strend-scan);
+ scan = strend - (MAX_MATCH-1);
+
+#else /* UNALIGNED_OK */
+
+ if (match[best_len] != scan_end ||
+ match[best_len-1] != scan_end1 ||
+ *match != *scan ||
+ *++match != scan[1]) continue;
+
+ /* The check at best_len-1 can be removed because it will be made
+ * again later. (This heuristic is not always a win.)
+ * It is not necessary to compare scan[2] and match[2] since they
+ * are always equal when the other bytes match, given that
+ * the hash keys are equal and that HASH_BITS >= 8.
+ */
+ scan += 2, match++;
+ Assert(*scan == *match, "match[2]?");
+
+ /* We check for insufficient lookahead only every 8th comparison;
+ * the 256th check will be made at strstart+258.
+ */
+ do {+ } while (*++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ scan < strend);
+
+ Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+
+ len = MAX_MATCH - (int)(strend - scan);
+ scan = strend - MAX_MATCH;
+
+#endif /* UNALIGNED_OK */
+
+ if (len > best_len) {+ s->match_start = cur_match;
+ best_len = len;
+ if (len >= nice_match) break;
+#ifdef UNALIGNED_OK
+ scan_end = *(ushf*)(scan+best_len-1);
+#else
+ scan_end1 = scan[best_len-1];
+ scan_end = scan[best_len];
+#endif
+ }
+ } while ((cur_match = prev[cur_match & wmask]) > limit
+ && --chain_length != 0);
+
+ if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
+ return s->lookahead;
+}
+#endif /* ASMV */
+#endif /* FASTEST */
+
+/* ---------------------------------------------------------------------------
+ * Optimized version for level == 1 or strategy == Z_RLE only
+ */
+local uInt longest_match_fast(deflate_state *s, IPos cur_match)
+{+ register Bytef *scan = s->window + s->strstart; /* current string */
+ register Bytef *match; /* matched string */
+ register int len; /* length of current match */
+ register Bytef *strend = s->window + s->strstart + MAX_MATCH;
+
+ /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
+ * It is easy to get rid of this optimization if necessary.
+ */
+ Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
+
+ Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
+
+ Assert(cur_match < s->strstart, "no future");
+
+ match = s->window + cur_match;
+
+ /* Return failure if the match length is less than 2:
+ */
+ if (match[0] != scan[0] || match[1] != scan[1]) return MIN_MATCH-1;
+
+ /* The check at best_len-1 can be removed because it will be made
+ * again later. (This heuristic is not always a win.)
+ * It is not necessary to compare scan[2] and match[2] since they
+ * are always equal when the other bytes match, given that
+ * the hash keys are equal and that HASH_BITS >= 8.
+ */
+ scan += 2, match += 2;
+ Assert(*scan == *match, "match[2]?");
+
+ /* We check for insufficient lookahead only every 8th comparison;
+ * the 256th check will be made at strstart+258.
+ */
+ do {+ } while (*++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ scan < strend);
+
+ Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+
+ len = MAX_MATCH - (int)(strend - scan);
+
+ if (len < MIN_MATCH) return MIN_MATCH - 1;
+
+ s->match_start = cur_match;
+ return (uInt)len <= s->lookahead ? (uInt)len : s->lookahead;
+}
+
+#ifdef DEBUG
+/* ===========================================================================
+ * Check that the match at match_start is indeed a match.
+ */
+local void check_match(deflate_state *s, IPos start, IPos match, int length)
+{+ /* check that the match is indeed a match */
+ if (zmemcmp(s->window + match,
+ s->window + start, length) != EQUAL) {+ fprintf(stderr, " start %u, match %u, length %d\n",
+ start, match, length);
+ do {+ fprintf(stderr, "%c%c", s->window[match++], s->window[start++]);
+ } while (--length != 0);
+ z_error("invalid match");+ }
+ if (z_verbose > 1) {+ fprintf(stderr,"\\[%d,%d]", start-match, length);
+ do { putc(s->window[start++], stderr); } while (--length != 0);+ }
+}
+#else
+# define check_match(s, start, match, length)
+#endif /* DEBUG */
+
+/* ===========================================================================
+ * Fill the window when the lookahead becomes insufficient.
+ * Updates strstart and lookahead.
+ *
+ * IN assertion: lookahead < MIN_LOOKAHEAD
+ * OUT assertions: strstart <= window_size-MIN_LOOKAHEAD
+ * At least one byte has been read, or avail_in == 0; reads are
+ * performed for at least two bytes (required for the zip translate_eol
+ * option -- not supported here).
+ */
+local void fill_window(deflate_state *s)
+{+ register unsigned n, m;
+ register Posf *p;
+ unsigned more; /* Amount of free space at the end of the window. */
+ uInt wsize = s->w_size;
+
+ do {+ more = (unsigned)(s->window_size -(ulg)s->lookahead -(ulg)s->strstart);
+
+ /* Deal with !@#$% 64K limit: */
+ if (sizeof(int) <= 2) {+ if (more == 0 && s->strstart == 0 && s->lookahead == 0) {+ more = wsize;
+
+ } else if (more == (unsigned)(-1)) {+ /* Very unlikely, but possible on 16 bit machine if
+ * strstart == 0 && lookahead == 1 (input done a byte at time)
+ */
+ more--;
+ }
+ }
+
+ /* If the window is almost full and there is insufficient lookahead,
+ * move the upper half to the lower one to make room in the upper half.
+ */
+ if (s->strstart >= wsize+MAX_DIST(s)) {+
+ zmemcpy(s->window, s->window+wsize, (unsigned)wsize);
+ s->match_start -= wsize;
+ s->strstart -= wsize; /* we now have strstart >= MAX_DIST */
+ s->block_start -= (long) wsize;
+
+ /* Slide the hash table (could be avoided with 32 bit values
+ at the expense of memory usage). We slide even when level == 0
+ to keep the hash table consistent if we switch back to level > 0
+ later. (Using level 0 permanently is not an optimal usage of
+ zlib, so we don't care about this pathological case.)
+ */
+ n = s->hash_size;
+ p = &s->head[n];
+ do {+ m = *--p;
+ *p = (Pos)(m >= wsize ? m-wsize : NIL);
+ } while (--n);
+
+ n = wsize;
+#ifndef FASTEST
+ p = &s->prev[n];
+ do {+ m = *--p;
+ *p = (Pos)(m >= wsize ? m-wsize : NIL);
+ /* If n is not on any hash chain, prev[n] is garbage but
+ * its value will never be used.
+ */
+ } while (--n);
+#endif
+ more += wsize;
+ }
+ if (s->strm->avail_in == 0) return;
+
+ /* If there was no sliding:
+ * strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&
+ * more == window_size - lookahead - strstart
+ * => more >= window_size - (MIN_LOOKAHEAD-1 + WSIZE + MAX_DIST-1)
+ * => more >= window_size - 2*WSIZE + 2
+ * In the BIG_MEM or MMAP case (not yet supported),
+ * window_size == input_size + MIN_LOOKAHEAD &&
+ * strstart + s->lookahead <= input_size => more >= MIN_LOOKAHEAD.
+ * Otherwise, window_size == 2*WSIZE so more >= 2.
+ * If there was sliding, more >= WSIZE. So in all cases, more >= 2.
+ */
+ Assert(more >= 2, "more < 2");
+
+ n = read_buf(s->strm, s->window + s->strstart + s->lookahead, more);
+ s->lookahead += n;
+
+ /* Initialize the hash value now that we have some input: */
+ if (s->lookahead >= MIN_MATCH) {+ s->ins_h = s->window[s->strstart];
+ UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);
+#if MIN_MATCH != 3
+ Call UPDATE_HASH() MIN_MATCH-3 more times
+#endif
+ }
+ /* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,
+ * but this is not important since only literal bytes will be emitted.
+ */
+
+ } while (s->lookahead < MIN_LOOKAHEAD && s->strm->avail_in != 0);
+}
+
+/* ===========================================================================
+ * Flush the current block, with given end-of-file flag.
+ * IN assertion: strstart is set to the end of the current match.
+ */
+#define FLUSH_BLOCK_ONLY(s, eof) { \+ _tr_flush_block(s, (s->block_start >= 0L ? \
+ (charf *)&s->window[(unsigned)s->block_start] : \
+ (charf *)Z_NULL), \
+ (ulg)((long)s->strstart - s->block_start), \
+ (eof)); \
+ s->block_start = s->strstart; \
+ flush_pending(s->strm); \
+ Tracev((stderr,"[FLUSH]")); \
+}
+
+/* Same but force premature exit if necessary. */
+#define FLUSH_BLOCK(s, eof) { \+ FLUSH_BLOCK_ONLY(s, eof); \
+ if (s->strm->avail_out == 0) return (eof) ? finish_started : need_more; \
+}
+
+/* ===========================================================================
+ * Copy without compression as much as possible from the input stream, return
+ * the current block state.
+ * This function does not insert new strings in the dictionary since
+ * uncompressible data is probably not useful. This function is used
+ * only for the level=0 compression option.
+ * NOTE: this function should be optimized to avoid extra copying from
+ * window to pending_buf.
+ */
+local block_state deflate_stored(deflate_state *s, int flush)
+{+ /* Stored blocks are limited to 0xffff bytes, pending_buf is limited
+ * to pending_buf_size, and each stored block has a 5 byte header:
+ */
+ ulg max_block_size = 0xffff;
+ ulg max_start;
+
+ if (max_block_size > s->pending_buf_size - 5) {+ max_block_size = s->pending_buf_size - 5;
+ }
+
+ /* Copy as much as possible from input to output: */
+ for (;;) {+ /* Fill the window as much as possible: */
+ if (s->lookahead <= 1) {+
+ Assert(s->strstart < s->w_size+MAX_DIST(s) ||
+ s->block_start >= (long)s->w_size, "slide too late");
+
+ fill_window(s);
+ if (s->lookahead == 0 && flush == Z_NO_FLUSH) return need_more;
+
+ if (s->lookahead == 0) break; /* flush the current block */
+ }
+ Assert(s->block_start >= 0L, "block gone");
+
+ s->strstart += s->lookahead;
+ s->lookahead = 0;
+
+ /* Emit a stored block if pending_buf will be full: */
+ max_start = s->block_start + max_block_size;
+ if (s->strstart == 0 || (ulg)s->strstart >= max_start) {+ /* strstart == 0 is possible when wraparound on 16-bit machine */
+ s->lookahead = (uInt)(s->strstart - max_start);
+ s->strstart = (uInt)max_start;
+ FLUSH_BLOCK(s, 0);
+ }
+ /* Flush if we may have to slide, otherwise block_start may become
+ * negative and the data will be gone:
+ */
+ if (s->strstart - (uInt)s->block_start >= MAX_DIST(s)) {+ FLUSH_BLOCK(s, 0);
+ }
+ }
+ FLUSH_BLOCK(s, flush == Z_FINISH);
+ return flush == Z_FINISH ? finish_done : block_done;
+}
+
+/* ===========================================================================
+ * Compress as much as possible from the input stream, return the current
+ * block state.
+ * This function does not perform lazy evaluation of matches and inserts
+ * new strings in the dictionary only for unmatched strings or for short
+ * matches. It is used only for the fast compression options.
+ */
+local block_state deflate_fast(deflate_state *s, int flush)
+{+ IPos hash_head = NIL; /* head of the hash chain */
+ int bflush; /* set if current block must be flushed */
+
+ for (;;) {+ /* Make sure that we always have enough lookahead, except
+ * at the end of the input file. We need MAX_MATCH bytes
+ * for the next match, plus MIN_MATCH bytes to insert the
+ * string following the next match.
+ */
+ if (s->lookahead < MIN_LOOKAHEAD) {+ fill_window(s);
+ if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {+ return need_more;
+ }
+ if (s->lookahead == 0) break; /* flush the current block */
+ }
+
+ /* Insert the string window[strstart .. strstart+2] in the
+ * dictionary, and set hash_head to the head of the hash chain:
+ */
+ if (s->lookahead >= MIN_MATCH) {+ INSERT_STRING(s, s->strstart, hash_head);
+ }
+
+ /* Find the longest match, discarding those <= prev_length.
+ * At this point we have always match_length < MIN_MATCH
+ */
+ if (hash_head != NIL && s->strstart - hash_head <= MAX_DIST(s)) {+ /* To simplify the code, we prevent matches with the string
+ * of window index 0 (in particular we have to avoid a match
+ * of the string with itself at the start of the input file).
+ */
+#ifdef FASTEST
+ if ((s->strategy < Z_HUFFMAN_ONLY) ||
+ (s->strategy == Z_RLE && s->strstart - hash_head == 1)) {+ s->match_length = longest_match_fast (s, hash_head);
+ }
+#else
+ if (s->strategy < Z_HUFFMAN_ONLY) {+ s->match_length = longest_match (s, hash_head);
+ } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {+ s->match_length = longest_match_fast (s, hash_head);
+ }
+#endif
+ /* longest_match() or longest_match_fast() sets match_start */
+ }
+ if (s->match_length >= MIN_MATCH) {+ check_match(s, s->strstart, s->match_start, s->match_length);
+
+ _tr_tally_dist(s, s->strstart - s->match_start,
+ s->match_length - MIN_MATCH, bflush);
+
+ s->lookahead -= s->match_length;
+
+ /* Insert new strings in the hash table only if the match length
+ * is not too large. This saves time but degrades compression.
+ */
+#ifndef FASTEST
+ if (s->match_length <= s->max_insert_length &&
+ s->lookahead >= MIN_MATCH) {+ s->match_length--; /* string at strstart already in table */
+ do {+ s->strstart++;
+ INSERT_STRING(s, s->strstart, hash_head);
+ /* strstart never exceeds WSIZE-MAX_MATCH, so there are
+ * always MIN_MATCH bytes ahead.
+ */
+ } while (--s->match_length != 0);
+ s->strstart++;
+ } else
+#endif
+ {+ s->strstart += s->match_length;
+ s->match_length = 0;
+ s->ins_h = s->window[s->strstart];
+ UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);
+#if MIN_MATCH != 3
+ Call UPDATE_HASH() MIN_MATCH-3 more times
+#endif
+ /* If lookahead < MIN_MATCH, ins_h is garbage, but it does not
+ * matter since it will be recomputed at next deflate call.
+ */
+ }
+ } else {+ /* No match, output a literal byte */
+ Tracevv((stderr,"%c", s->window[s->strstart]));
+ _tr_tally_lit (s, s->window[s->strstart], bflush);
+ s->lookahead--;
+ s->strstart++;
+ }
+ if (bflush) FLUSH_BLOCK(s, 0);
+ }
+ FLUSH_BLOCK(s, flush == Z_FINISH);
+ return flush == Z_FINISH ? finish_done : block_done;
+}
+
+#ifndef FASTEST
+/* ===========================================================================
+ * Same as above, but achieves better compression. We use a lazy
+ * evaluation for matches: a match is finally adopted only if there is
+ * no better match at the next window position.
+ */
+local block_state deflate_slow(deflate_state *s, int flush)
+{+ IPos hash_head = NIL; /* head of hash chain */
+ int bflush; /* set if current block must be flushed */
+
+ /* Process the input block. */
+ for (;;) {+ /* Make sure that we always have enough lookahead, except
+ * at the end of the input file. We need MAX_MATCH bytes
+ * for the next match, plus MIN_MATCH bytes to insert the
+ * string following the next match.
+ */
+ if (s->lookahead < MIN_LOOKAHEAD) {+ fill_window(s);
+ if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {+ return need_more;
+ }
+ if (s->lookahead == 0) break; /* flush the current block */
+ }
+
+ /* Insert the string window[strstart .. strstart+2] in the
+ * dictionary, and set hash_head to the head of the hash chain:
+ */
+ if (s->lookahead >= MIN_MATCH) {+ INSERT_STRING(s, s->strstart, hash_head);
+ }
+
+ /* Find the longest match, discarding those <= prev_length.
+ */
+ s->prev_length = s->match_length, s->prev_match = s->match_start;
+ s->match_length = MIN_MATCH-1;
+
+ if (hash_head != NIL && s->prev_length < s->max_lazy_match &&
+ s->strstart - hash_head <= MAX_DIST(s)) {+ /* To simplify the code, we prevent matches with the string
+ * of window index 0 (in particular we have to avoid a match
+ * of the string with itself at the start of the input file).
+ */
+ if (s->strategy < Z_HUFFMAN_ONLY) {+ s->match_length = longest_match (s, hash_head);
+ } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {+ s->match_length = longest_match_fast (s, hash_head);
+ }
+ /* longest_match() or longest_match_fast() sets match_start */
+
+ if (s->match_length <= 5 && (s->strategy == Z_FILTERED
+#if TOO_FAR <= 32767
+ || (s->match_length == MIN_MATCH &&
+ s->strstart - s->match_start > TOO_FAR)
+#endif
+ )) {+
+ /* If prev_match is also MIN_MATCH, match_start is garbage
+ * but we will ignore the current match anyway.
+ */
+ s->match_length = MIN_MATCH-1;
+ }
+ }
+ /* If there was a match at the previous step and the current
+ * match is not better, output the previous match:
+ */
+ if (s->prev_length >= MIN_MATCH && s->match_length <= s->prev_length) {+ uInt max_insert = s->strstart + s->lookahead - MIN_MATCH;
+ /* Do not insert strings in hash table beyond this. */
+
+ check_match(s, s->strstart-1, s->prev_match, s->prev_length);
+
+ _tr_tally_dist(s, s->strstart -1 - s->prev_match,
+ s->prev_length - MIN_MATCH, bflush);
+
+ /* Insert in hash table all strings up to the end of the match.
+ * strstart-1 and strstart are already inserted. If there is not
+ * enough lookahead, the last two strings are not inserted in
+ * the hash table.
+ */
+ s->lookahead -= s->prev_length-1;
+ s->prev_length -= 2;
+ do {+ if (++s->strstart <= max_insert) {+ INSERT_STRING(s, s->strstart, hash_head);
+ }
+ } while (--s->prev_length != 0);
+ s->match_available = 0;
+ s->match_length = MIN_MATCH-1;
+ s->strstart++;
+
+ if (bflush) FLUSH_BLOCK(s, 0);
+
+ } else if (s->match_available) {+ /* If there was no match at the previous position, output a
+ * single literal. If there was a match but the current match
+ * is longer, truncate the previous match to a single literal.
+ */
+ Tracevv((stderr,"%c", s->window[s->strstart-1]));
+ _tr_tally_lit(s, s->window[s->strstart-1], bflush);
+ if (bflush) {+ FLUSH_BLOCK_ONLY(s, 0);
+ }
+ s->strstart++;
+ s->lookahead--;
+ if (s->strm->avail_out == 0) return need_more;
+ } else {+ /* There is no previous match to compare with, wait for
+ * the next step to decide.
+ */
+ s->match_available = 1;
+ s->strstart++;
+ s->lookahead--;
+ }
+ }
+ Assert (flush != Z_NO_FLUSH, "no flush?");
+ if (s->match_available) {+ Tracevv((stderr,"%c", s->window[s->strstart-1]));
+ _tr_tally_lit(s, s->window[s->strstart-1], bflush);
+ s->match_available = 0;
+ }
+ FLUSH_BLOCK(s, flush == Z_FINISH);
+ return flush == Z_FINISH ? finish_done : block_done;
+}
+#endif /* FASTEST */
--- /dev/null
+++ b/src/gfx/zlib/deflate.h
@@ -1,0 +1,327 @@
+/* deflate.h -- internal compression state
+ * Copyright (C) 1995-2002 Jean-loup Gailly
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+ part of the implementation of the compression library and is
+ subject to change. Applications should only use zlib.h.
+ */
+
+/* @(#) $Id: deflate.h,v 1.1.1.1 2005/04/24 21:39:40 giles Exp $ */
+
+#ifndef DEFLATE_H
+#define DEFLATE_H
+
+#include "zutil.h"
+
+/* define NO_GZIP when compiling if you want to disable gzip header and
+ trailer creation by deflate(). NO_GZIP would be used to avoid linking in
+ the crc code when it is not needed. For shared libraries, gzip encoding
+ should be left enabled. */
+#ifndef NO_GZIP
+# define GZIP
+#endif
+
+/* ===========================================================================
+ * Internal compression state.
+ */
+
+#define LENGTH_CODES 29
+/* number of length codes, not counting the special END_BLOCK code */
+
+#define LITERALS 256
+/* number of literal bytes 0..255 */
+
+#define L_CODES (LITERALS+1+LENGTH_CODES)
+/* number of Literal or Length codes, including the END_BLOCK code */
+
+#define D_CODES 30
+/* number of distance codes */
+
+#define BL_CODES 19
+/* number of codes used to transfer the bit lengths */
+
+#define HEAP_SIZE (2*L_CODES+1)
+/* maximum heap size */
+
+#define MAX_BITS 15
+/* All codes must not exceed MAX_BITS bits */
+
+#define INIT_STATE 42
+#define BUSY_STATE 113
+#define FINISH_STATE 666
+/* Stream status */
+
+
+/* Data structure describing a single value and its code string. */
+typedef struct ct_data_s {+ union {+ ush freq; /* frequency count */
+ ush code; /* bit string */
+ } fc;
+ union {+ ush dad; /* father node in Huffman tree */
+ ush len; /* length of bit string */
+ } dl;
+} FAR ct_data;
+
+#define Freq fc.freq
+#define Code fc.code
+#define Dad dl.dad
+#define Len dl.len
+
+typedef struct static_tree_desc_s static_tree_desc;
+
+typedef struct tree_desc_s {+ ct_data *dyn_tree; /* the dynamic tree */
+ int max_code; /* largest code with non zero frequency */
+ static_tree_desc *stat_desc; /* the corresponding static tree */
+} FAR tree_desc;
+
+typedef ush Pos;
+typedef Pos FAR Posf;
+typedef unsigned IPos;
+
+/* A Pos is an index in the character window. We use short instead of int to
+ * save space in the various tables. IPos is used only for parameter passing.
+ */
+
+typedef struct internal_state {+ z_streamp strm; /* pointer back to this zlib stream */
+ int status; /* as the name implies */
+ Bytef *pending_buf; /* output still pending */
+ ulg pending_buf_size; /* size of pending_buf */
+ Bytef *pending_out; /* next pending byte to output to the stream */
+ int pending; /* nb of bytes in the pending buffer */
+ int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
+ Byte method; /* STORED (for zip only) or DEFLATED */
+ int last_flush; /* value of flush param for previous deflate call */
+
+ /* used by deflate.c: */
+
+ uInt w_size; /* LZ77 window size (32K by default) */
+ uInt w_bits; /* log2(w_size) (8..16) */
+ uInt w_mask; /* w_size - 1 */
+
+ Bytef *window;
+ /* Sliding window. Input bytes are read into the second half of the window,
+ * and move to the first half later to keep a dictionary of at least wSize
+ * bytes. With this organization, matches are limited to a distance of
+ * wSize-MAX_MATCH bytes, but this ensures that IO is always
+ * performed with a length multiple of the block size. Also, it limits
+ * the window size to 64K, which is quite useful on MSDOS.
+ * To do: use the user input buffer as sliding window.
+ */
+
+ ulg window_size;
+ /* Actual size of window: 2*wSize, except when the user input buffer
+ * is directly used as sliding window.
+ */
+
+ Posf *prev;
+ /* Link to older string with same hash index. To limit the size of this
+ * array to 64K, this link is maintained only for the last 32K strings.
+ * An index in this array is thus a window index modulo 32K.
+ */
+
+ Posf *head; /* Heads of the hash chains or NIL. */
+
+ uInt ins_h; /* hash index of string to be inserted */
+ uInt hash_size; /* number of elements in hash table */
+ uInt hash_bits; /* log2(hash_size) */
+ uInt hash_mask; /* hash_size-1 */
+
+ uInt hash_shift;
+ /* Number of bits by which ins_h must be shifted at each input
+ * step. It must be such that after MIN_MATCH steps, the oldest
+ * byte no longer takes part in the hash key, that is:
+ * hash_shift * MIN_MATCH >= hash_bits
+ */
+
+ long block_start;
+ /* Window position at the beginning of the current output block. Gets
+ * negative when the window is moved backwards.
+ */
+
+ uInt match_length; /* length of best match */
+ IPos prev_match; /* previous match */
+ int match_available; /* set if previous match exists */
+ uInt strstart; /* start of string to insert */
+ uInt match_start; /* start of matching string */
+ uInt lookahead; /* number of valid bytes ahead in window */
+
+ uInt prev_length;
+ /* Length of the best match at previous step. Matches not greater than this
+ * are discarded. This is used in the lazy match evaluation.
+ */
+
+ uInt max_chain_length;
+ /* To speed up deflation, hash chains are never searched beyond this
+ * length. A higher limit improves compression ratio but degrades the
+ * speed.
+ */
+
+ uInt max_lazy_match;
+ /* Attempt to find a better match only when the current match is strictly
+ * smaller than this value. This mechanism is used only for compression
+ * levels >= 4.
+ */
+# define max_insert_length max_lazy_match
+ /* Insert new strings in the hash table only if the match length is not
+ * greater than this length. This saves time but degrades compression.
+ * max_insert_length is used only for compression levels <= 3.
+ */
+
+ int level; /* compression level (1..9) */
+ int strategy; /* favor or force Huffman coding*/
+
+ uInt good_match;
+ /* Use a faster search when the previous match is longer than this */
+
+ int nice_match; /* Stop searching when current match exceeds this */
+
+ /* used by trees.c: */
+ /* Didn't use ct_data typedef below to supress compiler warning */
+ struct ct_data_s dyn_ltree[HEAP_SIZE]; /* literal and length tree */
+ struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */
+ struct ct_data_s bl_tree[2*BL_CODES+1]; /* Huffman tree for bit lengths */
+
+ struct tree_desc_s l_desc; /* desc. for literal tree */
+ struct tree_desc_s d_desc; /* desc. for distance tree */
+ struct tree_desc_s bl_desc; /* desc. for bit length tree */
+
+ ush bl_count[MAX_BITS+1];
+ /* number of codes at each bit length for an optimal tree */
+
+ int heap[2*L_CODES+1]; /* heap used to build the Huffman trees */
+ int heap_len; /* number of elements in the heap */
+ int heap_max; /* element of largest frequency */
+ /* The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used.
+ * The same heap array is used to build all trees.
+ */
+
+ uch depth[2*L_CODES+1];
+ /* Depth of each subtree used as tie breaker for trees of equal frequency
+ */
+
+ uchf *l_buf; /* buffer for literals or lengths */
+
+ uInt lit_bufsize;
+ /* Size of match buffer for literals/lengths. There are 4 reasons for
+ * limiting lit_bufsize to 64K:
+ * - frequencies can be kept in 16 bit counters
+ * - if compression is not successful for the first block, all input
+ * data is still in the window so we can still emit a stored block even
+ * when input comes from standard input. (This can also be done for
+ * all blocks if lit_bufsize is not greater than 32K.)
+ * - if compression is not successful for a file smaller than 64K, we can
+ * even emit a stored file instead of a stored block (saving 5 bytes).
+ * This is applicable only for zip (not gzip or zlib).
+ * - creating new Huffman trees less frequently may not provide fast
+ * adaptation to changes in the input data statistics. (Take for
+ * example a binary file with poorly compressible code followed by
+ * a highly compressible string table.) Smaller buffer sizes give
+ * fast adaptation but have of course the overhead of transmitting
+ * trees more frequently.
+ * - I can't count above 4
+ */
+
+ uInt last_lit; /* running index in l_buf */
+
+ ushf *d_buf;
+ /* Buffer for distances. To simplify the code, d_buf and l_buf have
+ * the same number of elements. To use different lengths, an extra flag
+ * array would be necessary.
+ */
+
+ ulg opt_len; /* bit length of current block with optimal trees */
+ ulg static_len; /* bit length of current block with static trees */
+ uInt matches; /* number of string matches in current block */
+ int last_eob_len; /* bit length of EOB code for last block */
+
+#ifdef DEBUG
+ ulg compressed_len; /* total bit length of compressed file mod 2^32 */
+ ulg bits_sent; /* bit length of compressed data sent mod 2^32 */
+#endif
+
+ ush bi_buf;
+ /* Output buffer. bits are inserted starting at the bottom (least
+ * significant bits).
+ */
+ int bi_valid;
+ /* Number of valid bits in bi_buf. All bits above the last valid bit
+ * are always zero.
+ */
+
+} FAR deflate_state;
+
+#pragma incomplete deflate_state;
+
+/* Output a byte on the stream.
+ * IN assertion: there is enough room in pending_buf.
+ */
+#define put_byte(s, c) {s->pending_buf[s->pending++] = (c);}+
+
+#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
+/* Minimum amount of lookahead, except at the end of the input file.
+ * See deflate.c for comments about the MIN_MATCH+1.
+ */
+
+#define MAX_DIST(s) ((s)->w_size-MIN_LOOKAHEAD)
+/* In order to simplify the code, particularly on 16 bit machines, match
+ * distances are limited to MAX_DIST instead of WSIZE.
+ */
+
+ /* in trees.c */
+void _tr_init(deflate_state *s);
+int _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc));
+void _tr_flush_block OF((deflate_state *s, charf *buf, ulg stored_len,
+ int eof));
+void _tr_align OF((deflate_state *s));
+void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
+ int eof));
+
+#define d_code(dist) \
+ ((dist) < 256 ? _dist_code[dist] : _dist_code[256+((dist)>>7)])
+/* Mapping from a distance to a distance code. dist is the distance - 1 and
+ * must not have side effects. _dist_code[256] and _dist_code[257] are never
+ * used.
+ */
+
+#ifndef DEBUG
+/* Inline versions of _tr_tally for speed: */
+
+#if defined(GEN_TREES_H) || !defined(STDC)
+ extern uch _length_code[];
+ extern uch _dist_code[];
+#else
+ extern const uch _length_code[];
+ extern const uch _dist_code[];
+#endif
+
+# define _tr_tally_lit(s, c, flush) \
+ { uch cc = (c); \+ s->d_buf[s->last_lit] = 0; \
+ s->l_buf[s->last_lit++] = cc; \
+ s->dyn_ltree[cc].Freq++; \
+ flush = (s->last_lit == s->lit_bufsize-1); \
+ }
+# define _tr_tally_dist(s, distance, length, flush) \
+ { uch len = (length); \+ ush dist = (distance); \
+ s->d_buf[s->last_lit] = dist; \
+ s->l_buf[s->last_lit++] = len; \
+ dist--; \
+ s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
+ s->dyn_dtree[d_code(dist)].Freq++; \
+ flush = (s->last_lit == s->lit_bufsize-1); \
+ }
+#else
+# define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
+# define _tr_tally_dist(s, distance, length, flush) \
+ flush = _tr_tally(s, distance, length)
+#endif
+
+#endif /* DEFLATE_H */
--- /dev/null
+++ b/src/gfx/zlib/example.c
@@ -1,0 +1,567 @@
+/* example.c -- usage example of the zlib compression library
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id: example.c,v 1.1.1.1 2005/04/24 21:39:37 giles Exp $ */
+
+#include <stdio.h>
+#include "zlib.h"
+
+#ifdef STDC
+# include <string.h>
+# include <stdlib.h>
+#else
+ extern void exit OF((int));
+#endif
+
+#if defined(VMS) || defined(RISCOS)
+# define TESTFILE "foo-gz"
+#else
+# define TESTFILE "foo.gz"
+#endif
+
+#define CHECK_ERR(err, msg) { \+ if (err != Z_OK) { \+ fprintf(stderr, "%s error: %d\n", msg, err); \
+ exit(1); \
+ } \
+}
+
+const char hello[] = "hello, hello!";
+/* "hello world" would be more standard, but the repeated "hello"
+ * stresses the compression code better, sorry...
+ */
+
+const char dictionary[] = "hello";
+uLong dictId; /* Adler32 value of the dictionary */
+
+void test_compress OF((Byte *compr, uLong comprLen,
+ Byte *uncompr, uLong uncomprLen));
+void test_gzio OF((const char *fname,
+ Byte *uncompr, uLong uncomprLen));
+void test_deflate OF((Byte *compr, uLong comprLen));
+void test_inflate OF((Byte *compr, uLong comprLen,
+ Byte *uncompr, uLong uncomprLen));
+void test_large_deflate OF((Byte *compr, uLong comprLen,
+ Byte *uncompr, uLong uncomprLen));
+void test_large_inflate OF((Byte *compr, uLong comprLen,
+ Byte *uncompr, uLong uncomprLen));
+void test_flush OF((Byte *compr, uLong *comprLen));
+void test_sync OF((Byte *compr, uLong comprLen,
+ Byte *uncompr, uLong uncomprLen));
+void test_dict_deflate OF((Byte *compr, uLong comprLen));
+void test_dict_inflate OF((Byte *compr, uLong comprLen,
+ Byte *uncompr, uLong uncomprLen));
+int main OF((int argc, char *argv[]));
+
+/* ===========================================================================
+ * Test compress() and uncompress()
+ */
+void test_compress(compr, comprLen, uncompr, uncomprLen)
+ Byte *compr, *uncompr;
+ uLong comprLen, uncomprLen;
+{+ int err;
+ uLong len = (uLong)strlen(hello)+1;
+
+ err = compress(compr, &comprLen, (const Bytef*)hello, len);
+ CHECK_ERR(err, "compress");
+
+ strcpy((char*)uncompr, "garbage");
+
+ err = uncompress(uncompr, &uncomprLen, compr, comprLen);
+ CHECK_ERR(err, "uncompress");
+
+ if (strcmp((char*)uncompr, hello)) {+ fprintf(stderr, "bad uncompress\n");
+ exit(1);
+ } else {+ printf("uncompress(): %s\n", (char *)uncompr);+ }
+}
+
+/* ===========================================================================
+ * Test read/write of .gz files
+ */
+void test_gzio(fname, uncompr, uncomprLen)
+ const char *fname; /* compressed file name */
+ Byte *uncompr;
+ uLong uncomprLen;
+{+#ifdef NO_GZCOMPRESS
+ fprintf(stderr, "NO_GZCOMPRESS -- gz* functions cannot compress\n");
+#else
+ int err;
+ int len = (int)strlen(hello)+1;
+ gzFile file;
+ z_off_t pos;
+
+ file = gzopen(fname, "wb");
+ if (file == NULL) {+ fprintf(stderr, "gzopen error\n");
+ exit(1);
+ }
+ gzputc(file, 'h');
+ if (gzputs(file, "ello") != 4) {+ fprintf(stderr, "gzputs err: %s\n", gzerror(file, &err));
+ exit(1);
+ }
+ if (gzprintf(file, ", %s!", "hello") != 8) {+ fprintf(stderr, "gzprintf err: %s\n", gzerror(file, &err));
+ exit(1);
+ }
+ gzseek(file, 1L, SEEK_CUR); /* add one zero byte */
+ gzclose(file);
+
+ file = gzopen(fname, "rb");
+ if (file == NULL) {+ fprintf(stderr, "gzopen error\n");
+ exit(1);
+ }
+ strcpy((char*)uncompr, "garbage");
+
+ if (gzread(file, uncompr, (unsigned)uncomprLen) != len) {+ fprintf(stderr, "gzread err: %s\n", gzerror(file, &err));
+ exit(1);
+ }
+ if (strcmp((char*)uncompr, hello)) {+ fprintf(stderr, "bad gzread: %s\n", (char*)uncompr);
+ exit(1);
+ } else {+ printf("gzread(): %s\n", (char*)uncompr);+ }
+
+ pos = gzseek(file, -8L, SEEK_CUR);
+ if (pos != 6 || gztell(file) != pos) {+ fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n",
+ (long)pos, (long)gztell(file));
+ exit(1);
+ }
+
+ if (gzgetc(file) != ' ') {+ fprintf(stderr, "gzgetc error\n");
+ exit(1);
+ }
+
+ if (gzungetc(' ', file) != ' ') {+ fprintf(stderr, "gzungetc error\n");
+ exit(1);
+ }
+
+ gzgets(file, (char*)uncompr, (int)uncomprLen);
+ if (strlen((char*)uncompr) != 7) { /* " hello!" */+ fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err));
+ exit(1);
+ }
+ if (strcmp((char*)uncompr, hello + 6)) {+ fprintf(stderr, "bad gzgets after gzseek\n");
+ exit(1);
+ } else {+ printf("gzgets() after gzseek: %s\n", (char*)uncompr);+ }
+
+ gzclose(file);
+#endif
+}
+
+/* ===========================================================================
+ * Test deflate() with small buffers
+ */
+void test_deflate(compr, comprLen)
+ Byte *compr;
+ uLong comprLen;
+{+ z_stream c_stream; /* compression stream */
+ int err;
+ uLong len = (uLong)strlen(hello)+1;
+
+ c_stream.zalloc = (alloc_func)0;
+ c_stream.zfree = (free_func)0;
+ c_stream.opaque = (voidpf)0;
+
+ err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
+ CHECK_ERR(err, "deflateInit");
+
+ c_stream.next_in = (Bytef*)hello;
+ c_stream.next_out = compr;
+
+ while (c_stream.total_in != len && c_stream.total_out < comprLen) {+ c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
+ err = deflate(&c_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, "deflate");
+ }
+ /* Finish the stream, still forcing small buffers: */
+ for (;;) {+ c_stream.avail_out = 1;
+ err = deflate(&c_stream, Z_FINISH);
+ if (err == Z_STREAM_END) break;
+ CHECK_ERR(err, "deflate");
+ }
+
+ err = deflateEnd(&c_stream);
+ CHECK_ERR(err, "deflateEnd");
+}
+
+/* ===========================================================================
+ * Test inflate() with small buffers
+ */
+void test_inflate(compr, comprLen, uncompr, uncomprLen)
+ Byte *compr, *uncompr;
+ uLong comprLen, uncomprLen;
+{+ int err;
+ z_stream d_stream; /* decompression stream */
+
+ strcpy((char*)uncompr, "garbage");
+
+ d_stream.zalloc = (alloc_func)0;
+ d_stream.zfree = (free_func)0;
+ d_stream.opaque = (voidpf)0;
+
+ d_stream.next_in = compr;
+ d_stream.avail_in = 0;
+ d_stream.next_out = uncompr;
+
+ err = inflateInit(&d_stream);
+ CHECK_ERR(err, "inflateInit");
+
+ while (d_stream.total_out < uncomprLen && d_stream.total_in < comprLen) {+ d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
+ err = inflate(&d_stream, Z_NO_FLUSH);
+ if (err == Z_STREAM_END) break;
+ CHECK_ERR(err, "inflate");
+ }
+
+ err = inflateEnd(&d_stream);
+ CHECK_ERR(err, "inflateEnd");
+
+ if (strcmp((char*)uncompr, hello)) {+ fprintf(stderr, "bad inflate\n");
+ exit(1);
+ } else {+ printf("inflate(): %s\n", (char *)uncompr);+ }
+}
+
+/* ===========================================================================
+ * Test deflate() with large buffers and dynamic change of compression level
+ */
+void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
+ Byte *compr, *uncompr;
+ uLong comprLen, uncomprLen;
+{+ z_stream c_stream; /* compression stream */
+ int err;
+
+ c_stream.zalloc = (alloc_func)0;
+ c_stream.zfree = (free_func)0;
+ c_stream.opaque = (voidpf)0;
+
+ err = deflateInit(&c_stream, Z_BEST_SPEED);
+ CHECK_ERR(err, "deflateInit");
+
+ c_stream.next_out = compr;
+ c_stream.avail_out = (uInt)comprLen;
+
+ /* At this point, uncompr is still mostly zeroes, so it should compress
+ * very well:
+ */
+ c_stream.next_in = uncompr;
+ c_stream.avail_in = (uInt)uncomprLen;
+ err = deflate(&c_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, "deflate");
+ if (c_stream.avail_in != 0) {+ fprintf(stderr, "deflate not greedy\n");
+ exit(1);
+ }
+
+ /* Feed in already compressed data and switch to no compression: */
+ deflateParams(&c_stream, Z_NO_COMPRESSION, Z_DEFAULT_STRATEGY);
+ c_stream.next_in = compr;
+ c_stream.avail_in = (uInt)comprLen/2;
+ err = deflate(&c_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, "deflate");
+
+ /* Switch back to compressing mode: */
+ deflateParams(&c_stream, Z_BEST_COMPRESSION, Z_FILTERED);
+ c_stream.next_in = uncompr;
+ c_stream.avail_in = (uInt)uncomprLen;
+ err = deflate(&c_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, "deflate");
+
+ err = deflate(&c_stream, Z_FINISH);
+ if (err != Z_STREAM_END) {+ fprintf(stderr, "deflate should report Z_STREAM_END\n");
+ exit(1);
+ }
+ err = deflateEnd(&c_stream);
+ CHECK_ERR(err, "deflateEnd");
+}
+
+/* ===========================================================================
+ * Test inflate() with large buffers
+ */
+void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
+ Byte *compr, *uncompr;
+ uLong comprLen, uncomprLen;
+{+ int err;
+ z_stream d_stream; /* decompression stream */
+
+ strcpy((char*)uncompr, "garbage");
+
+ d_stream.zalloc = (alloc_func)0;
+ d_stream.zfree = (free_func)0;
+ d_stream.opaque = (voidpf)0;
+
+ d_stream.next_in = compr;
+ d_stream.avail_in = (uInt)comprLen;
+
+ err = inflateInit(&d_stream);
+ CHECK_ERR(err, "inflateInit");
+
+ for (;;) {+ d_stream.next_out = uncompr; /* discard the output */
+ d_stream.avail_out = (uInt)uncomprLen;
+ err = inflate(&d_stream, Z_NO_FLUSH);
+ if (err == Z_STREAM_END) break;
+ CHECK_ERR(err, "large inflate");
+ }
+
+ err = inflateEnd(&d_stream);
+ CHECK_ERR(err, "inflateEnd");
+
+ if (d_stream.total_out != 2*uncomprLen + comprLen/2) {+ fprintf(stderr, "bad large inflate: %ld\n", d_stream.total_out);
+ exit(1);
+ } else {+ printf("large_inflate(): OK\n");+ }
+}
+
+/* ===========================================================================
+ * Test deflate() with full flush
+ */
+void test_flush(compr, comprLen)
+ Byte *compr;
+ uLong *comprLen;
+{+ z_stream c_stream; /* compression stream */
+ int err;
+ uInt len = (uInt)strlen(hello)+1;
+
+ c_stream.zalloc = (alloc_func)0;
+ c_stream.zfree = (free_func)0;
+ c_stream.opaque = (voidpf)0;
+
+ err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
+ CHECK_ERR(err, "deflateInit");
+
+ c_stream.next_in = (Bytef*)hello;
+ c_stream.next_out = compr;
+ c_stream.avail_in = 3;
+ c_stream.avail_out = (uInt)*comprLen;
+ err = deflate(&c_stream, Z_FULL_FLUSH);
+ CHECK_ERR(err, "deflate");
+
+ compr[3]++; /* force an error in first compressed block */
+ c_stream.avail_in = len - 3;
+
+ err = deflate(&c_stream, Z_FINISH);
+ if (err != Z_STREAM_END) {+ CHECK_ERR(err, "deflate");
+ }
+ err = deflateEnd(&c_stream);
+ CHECK_ERR(err, "deflateEnd");
+
+ *comprLen = c_stream.total_out;
+}
+
+/* ===========================================================================
+ * Test inflateSync()
+ */
+void test_sync(compr, comprLen, uncompr, uncomprLen)
+ Byte *compr, *uncompr;
+ uLong comprLen, uncomprLen;
+{+ int err;
+ z_stream d_stream; /* decompression stream */
+
+ strcpy((char*)uncompr, "garbage");
+
+ d_stream.zalloc = (alloc_func)0;
+ d_stream.zfree = (free_func)0;
+ d_stream.opaque = (voidpf)0;
+
+ d_stream.next_in = compr;
+ d_stream.avail_in = 2; /* just read the zlib header */
+
+ err = inflateInit(&d_stream);
+ CHECK_ERR(err, "inflateInit");
+
+ d_stream.next_out = uncompr;
+ d_stream.avail_out = (uInt)uncomprLen;
+
+ inflate(&d_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, "inflate");
+
+ d_stream.avail_in = (uInt)comprLen-2; /* read all compressed data */
+ err = inflateSync(&d_stream); /* but skip the damaged part */
+ CHECK_ERR(err, "inflateSync");
+
+ err = inflate(&d_stream, Z_FINISH);
+ if (err != Z_DATA_ERROR) {+ fprintf(stderr, "inflate should report DATA_ERROR\n");
+ /* Because of incorrect adler32 */
+ exit(1);
+ }
+ err = inflateEnd(&d_stream);
+ CHECK_ERR(err, "inflateEnd");
+
+ printf("after inflateSync(): hel%s\n", (char *)uncompr);+}
+
+/* ===========================================================================
+ * Test deflate() with preset dictionary
+ */
+void test_dict_deflate(compr, comprLen)
+ Byte *compr;
+ uLong comprLen;
+{+ z_stream c_stream; /* compression stream */
+ int err;
+
+ c_stream.zalloc = (alloc_func)0;
+ c_stream.zfree = (free_func)0;
+ c_stream.opaque = (voidpf)0;
+
+ err = deflateInit(&c_stream, Z_BEST_COMPRESSION);
+ CHECK_ERR(err, "deflateInit");
+
+ err = deflateSetDictionary(&c_stream,
+ (const Bytef*)dictionary, sizeof(dictionary));
+ CHECK_ERR(err, "deflateSetDictionary");
+
+ dictId = c_stream.adler;
+ c_stream.next_out = compr;
+ c_stream.avail_out = (uInt)comprLen;
+
+ c_stream.next_in = (Bytef*)hello;
+ c_stream.avail_in = (uInt)strlen(hello)+1;
+
+ err = deflate(&c_stream, Z_FINISH);
+ if (err != Z_STREAM_END) {+ fprintf(stderr, "deflate should report Z_STREAM_END\n");
+ exit(1);
+ }
+ err = deflateEnd(&c_stream);
+ CHECK_ERR(err, "deflateEnd");
+}
+
+/* ===========================================================================
+ * Test inflate() with a preset dictionary
+ */
+void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
+ Byte *compr, *uncompr;
+ uLong comprLen, uncomprLen;
+{+ int err;
+ z_stream d_stream; /* decompression stream */
+
+ strcpy((char*)uncompr, "garbage");
+
+ d_stream.zalloc = (alloc_func)0;
+ d_stream.zfree = (free_func)0;
+ d_stream.opaque = (voidpf)0;
+
+ d_stream.next_in = compr;
+ d_stream.avail_in = (uInt)comprLen;
+
+ err = inflateInit(&d_stream);
+ CHECK_ERR(err, "inflateInit");
+
+ d_stream.next_out = uncompr;
+ d_stream.avail_out = (uInt)uncomprLen;
+
+ for (;;) {+ err = inflate(&d_stream, Z_NO_FLUSH);
+ if (err == Z_STREAM_END) break;
+ if (err == Z_NEED_DICT) {+ if (d_stream.adler != dictId) {+ fprintf(stderr, "unexpected dictionary");
+ exit(1);
+ }
+ err = inflateSetDictionary(&d_stream, (const Bytef*)dictionary,
+ sizeof(dictionary));
+ }
+ CHECK_ERR(err, "inflate with dict");
+ }
+
+ err = inflateEnd(&d_stream);
+ CHECK_ERR(err, "inflateEnd");
+
+ if (strcmp((char*)uncompr, hello)) {+ fprintf(stderr, "bad inflate with dict\n");
+ exit(1);
+ } else {+ printf("inflate with dictionary: %s\n", (char *)uncompr);+ }
+}
+
+/* ===========================================================================
+ * Usage: example [output.gz [input.gz]]
+ */
+
+int main(argc, argv)
+ int argc;
+ char *argv[];
+{+ Byte *compr, *uncompr;
+ uLong comprLen = 10000*sizeof(int); /* don't overflow on MSDOS */
+ uLong uncomprLen = comprLen;
+ static const char* myVersion = ZLIB_VERSION;
+
+ if (zlibVersion()[0] != myVersion[0]) {+ fprintf(stderr, "incompatible zlib version\n");
+ exit(1);
+
+ } else if (strcmp(zlibVersion(), ZLIB_VERSION) != 0) {+ fprintf(stderr, "warning: different zlib version\n");
+ }
+
+ printf("zlib version %s = 0x%04x, compile flags = 0x%lx\n",+ ZLIB_VERSION, ZLIB_VERNUM, zlibCompileFlags());
+
+ compr = (Byte*)calloc((uInt)comprLen, 1);
+ uncompr = (Byte*)calloc((uInt)uncomprLen, 1);
+ /* compr and uncompr are cleared to avoid reading uninitialized
+ * data and to ensure that uncompr compresses well.
+ */
+ if (compr == Z_NULL || uncompr == Z_NULL) {+ printf("out of memory\n");+ exit(1);
+ }
+ test_compress(compr, comprLen, uncompr, uncomprLen);
+
+ test_gzio((argc > 1 ? argv[1] : TESTFILE),
+ uncompr, uncomprLen);
+
+ test_deflate(compr, comprLen);
+ test_inflate(compr, comprLen, uncompr, uncomprLen);
+
+ test_large_deflate(compr, comprLen, uncompr, uncomprLen);
+ test_large_inflate(compr, comprLen, uncompr, uncomprLen);
+
+ test_flush(compr, &comprLen);
+ test_sync(compr, comprLen, uncompr, uncomprLen);
+ comprLen = uncomprLen;
+
+ test_dict_deflate(compr, comprLen);
+ test_dict_inflate(compr, comprLen, uncompr, uncomprLen);
+
+ free(compr);
+ free(uncompr);
+
+ return 0;
+}
--- /dev/null
+++ b/src/gfx/zlib/gzio.c
@@ -1,0 +1,1009 @@
+/* gzio.c -- IO on .gz files
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ *
+ * Compile this file with -DNO_GZCOMPRESS to avoid the compression code.
+ */
+
+/* @(#) $Id: gzio.c,v 1.1.1.1 2005/04/24 21:39:39 giles Exp $ */
+
+#include <stdio.h>
+
+#include "zutil.h"
+
+#ifdef NO_DEFLATE /* for compatiblity with old definition */
+# define NO_GZCOMPRESS
+#endif
+
+#ifndef NO_DUMMY_DECL
+struct internal_state {int dummy;}; /* for buggy compilers */+#endif
+
+#ifndef Z_BUFSIZE
+# ifdef MAXSEG_64K
+# define Z_BUFSIZE 4096 /* minimize memory usage for 16-bit DOS */
+# else
+# define Z_BUFSIZE 16384
+# endif
+#endif
+#ifndef Z_PRINTF_BUFSIZE
+# define Z_PRINTF_BUFSIZE 4096
+#endif
+
+#ifdef __MVS__
+# pragma map (fdopen , "\174\174FDOPEN")
+ FILE *fdopen(int, const char *);
+#endif
+
+#ifndef STDC
+extern voidp malloc OF((uInt size));
+extern void free OF((voidpf ptr));
+#endif
+
+#define ALLOC(size) malloc(size)
+#define TRYFREE(p) {if (p) free(p);}+
+static int const gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */+
+/* gzip flag byte */
+#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
+#define HEAD_CRC 0x02 /* bit 1 set: header CRC present */
+#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
+#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
+#define COMMENT 0x10 /* bit 4 set: file comment present */
+#define RESERVED 0xE0 /* bits 5..7: reserved */
+
+typedef struct gz_stream {+ z_stream stream;
+ int z_err; /* error code for last stream operation */
+ int z_eof; /* set if end of input file */
+ FILE *file; /* .gz file */
+ Byte *inbuf; /* input buffer */
+ Byte *outbuf; /* output buffer */
+ uLong crc; /* crc32 of uncompressed data */
+ char *msg; /* error message */
+ char *path; /* path name for debugging only */
+ int transparent; /* 1 if input file is not a .gz file */
+ char mode; /* 'w' or 'r' */
+ z_off_t start; /* start of compressed data in file (header skipped) */
+ z_off_t in; /* bytes into deflate or inflate */
+ z_off_t out; /* bytes out of deflate or inflate */
+ int back; /* one character push-back */
+ int last; /* true if push-back is last character */
+} gz_stream;
+
+
+local gzFile gz_open OF((const char *path, const char *mode, int fd));
+local int do_flush OF((gzFile file, int flush));
+local int get_byte OF((gz_stream *s));
+local void check_header OF((gz_stream *s));
+local int destroy OF((gz_stream *s));
+local void putLong OF((FILE *file, uLong x));
+local uLong getLong OF((gz_stream *s));
+
+/* ===========================================================================
+ Opens a gzip (.gz) file for reading or writing. The mode parameter
+ is as in fopen ("rb" or "wb"). The file is given either by file descriptor+ or path name (if fd == -1).
+ gz_open returns NULL if the file could not be opened or if there was
+ insufficient memory to allocate the (de)compression state; errno
+ can be checked to distinguish the two cases (if errno is zero, the
+ zlib error is Z_MEM_ERROR).
+*/
+local gzFile gz_open (path, mode, fd)
+ const char *path;
+ const char *mode;
+ int fd;
+{+ int err;
+ int level = Z_DEFAULT_COMPRESSION; /* compression level */
+ int strategy = Z_DEFAULT_STRATEGY; /* compression strategy */
+ char *p = (char*)mode;
+ gz_stream *s;
+ char fmode[80]; /* copy of mode, without the compression level */
+ char *m = fmode;
+
+ if (!path || !mode) return Z_NULL;
+
+ s = (gz_stream *)ALLOC(sizeof(gz_stream));
+ if (!s) return Z_NULL;
+
+ s->stream.zalloc = (alloc_func)0;
+ s->stream.zfree = (free_func)0;
+ s->stream.opaque = (voidpf)0;
+ s->stream.next_in = s->inbuf = Z_NULL;
+ s->stream.next_out = s->outbuf = Z_NULL;
+ s->stream.avail_in = s->stream.avail_out = 0;
+ s->file = NULL;
+ s->z_err = Z_OK;
+ s->z_eof = 0;
+ s->in = 0;
+ s->out = 0;
+ s->back = EOF;
+ s->crc = crc32(0L, Z_NULL, 0);
+ s->msg = NULL;
+ s->transparent = 0;
+
+ s->path = (char*)ALLOC(strlen(path)+1);
+ if (s->path == NULL) {+ return destroy(s), (gzFile)Z_NULL;
+ }
+ strcpy(s->path, path); /* do this early for debugging */
+
+ s->mode = '\0';
+ do {+ if (*p == 'r') s->mode = 'r';
+ if (*p == 'w' || *p == 'a') s->mode = 'w';
+ if (*p >= '0' && *p <= '9') {+ level = *p - '0';
+ } else if (*p == 'f') {+ strategy = Z_FILTERED;
+ } else if (*p == 'h') {+ strategy = Z_HUFFMAN_ONLY;
+ } else if (*p == 'R') {+ strategy = Z_RLE;
+ } else {+ *m++ = *p; /* copy the mode */
+ }
+ } while (*p++ && m != fmode + sizeof(fmode));
+ if (s->mode == '\0') return destroy(s), (gzFile)Z_NULL;
+
+ if (s->mode == 'w') {+#ifdef NO_GZCOMPRESS
+ err = Z_STREAM_ERROR;
+#else
+ err = deflateInit2(&(s->stream), level,
+ Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, strategy);
+ /* windowBits is passed < 0 to suppress zlib header */
+
+ s->stream.next_out = s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
+#endif
+ if (err != Z_OK || s->outbuf == Z_NULL) {+ return destroy(s), (gzFile)Z_NULL;
+ }
+ } else {+ s->stream.next_in = s->inbuf = (Byte*)ALLOC(Z_BUFSIZE);
+
+ err = inflateInit2(&(s->stream), -MAX_WBITS);
+ /* windowBits is passed < 0 to tell that there is no zlib header.
+ * Note that in this case inflate *requires* an extra "dummy" byte
+ * after the compressed stream in order to complete decompression and
+ * return Z_STREAM_END. Here the gzip CRC32 ensures that 4 bytes are
+ * present after the compressed stream.
+ */
+ if (err != Z_OK || s->inbuf == Z_NULL) {+ return destroy(s), (gzFile)Z_NULL;
+ }
+ }
+ s->stream.avail_out = Z_BUFSIZE;
+
+ errno = 0;
+ s->file = fd < 0 ? F_OPEN(path, fmode) : (FILE*)fdopen(fd, fmode);
+
+ if (s->file == NULL) {+ return destroy(s), (gzFile)Z_NULL;
+ }
+ if (s->mode == 'w') {+ /* Write a very simple .gz header:
+ */
+ fprintf(s->file, "%c%c%c%c%c%c%c%c%c%c", gz_magic[0], gz_magic[1],
+ Z_DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, 0 /*xflags*/, OS_CODE);
+ s->start = 10L;
+ /* We use 10L instead of ftell(s->file) to because ftell causes an
+ * fflush on some systems. This version of the library doesn't use
+ * start anyway in write mode, so this initialization is not
+ * necessary.
+ */
+ } else {+ check_header(s); /* skip the .gz header */
+ s->start = ftell(s->file) - s->stream.avail_in;
+ }
+
+ return (gzFile)s;
+}
+
+/* ===========================================================================
+ Opens a gzip (.gz) file for reading or writing.
+*/
+gzFile ZEXPORT gzopen (path, mode)
+ const char *path;
+ const char *mode;
+{+ return gz_open (path, mode, -1);
+}
+
+/* ===========================================================================
+ Associate a gzFile with the file descriptor fd. fd is not dup'ed here
+ to mimic the behavio(u)r of fdopen.
+*/
+gzFile ZEXPORT gzdopen (fd, mode)
+ int fd;
+ const char *mode;
+{+ char name[20];
+
+ if (fd < 0) return (gzFile)Z_NULL;
+ sprintf(name, "<fd:%d>", fd); /* for debugging */
+
+ return gz_open (name, mode, fd);
+}
+
+/* ===========================================================================
+ * Update the compression level and strategy
+ */
+int ZEXPORT gzsetparams (file, level, strategy)
+ gzFile file;
+ int level;
+ int strategy;
+{+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
+
+ /* Make room to allow flushing */
+ if (s->stream.avail_out == 0) {+
+ s->stream.next_out = s->outbuf;
+ if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {+ s->z_err = Z_ERRNO;
+ }
+ s->stream.avail_out = Z_BUFSIZE;
+ }
+
+ return deflateParams (&(s->stream), level, strategy);
+}
+
+/* ===========================================================================
+ Read a byte from a gz_stream; update next_in and avail_in. Return EOF
+ for end of file.
+ IN assertion: the stream s has been sucessfully opened for reading.
+*/
+local int get_byte(s)
+ gz_stream *s;
+{+ if (s->z_eof) return EOF;
+ if (s->stream.avail_in == 0) {+ errno = 0;
+ s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file);
+ if (s->stream.avail_in == 0) {+ s->z_eof = 1;
+ if (ferror(s->file)) s->z_err = Z_ERRNO;
+ return EOF;
+ }
+ s->stream.next_in = s->inbuf;
+ }
+ s->stream.avail_in--;
+ return *(s->stream.next_in)++;
+}
+
+/* ===========================================================================
+ Check the gzip header of a gz_stream opened for reading. Set the stream
+ mode to transparent if the gzip magic header is not present; set s->err
+ to Z_DATA_ERROR if the magic header is present but the rest of the header
+ is incorrect.
+ IN assertion: the stream s has already been created sucessfully;
+ s->stream.avail_in is zero for the first time, but may be non-zero
+ for concatenated .gz files.
+*/
+local void check_header(s)
+ gz_stream *s;
+{+ int method; /* method byte */
+ int flags; /* flags byte */
+ uInt len;
+ int c;
+
+ /* Assure two bytes in the buffer so we can peek ahead -- handle case
+ where first byte of header is at the end of the buffer after the last
+ gzip segment */
+ len = s->stream.avail_in;
+ if (len < 2) {+ if (len) s->inbuf[0] = s->stream.next_in[0];
+ errno = 0;
+ len = fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
+ if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO;
+ s->stream.avail_in += len;
+ s->stream.next_in = s->inbuf;
+ if (s->stream.avail_in < 2) {+ s->transparent = s->stream.avail_in;
+ return;
+ }
+ }
+
+ /* Peek ahead to check the gzip magic header */
+ if (s->stream.next_in[0] != gz_magic[0] ||
+ s->stream.next_in[1] != gz_magic[1]) {+ s->transparent = 1;
+ return;
+ }
+ s->stream.avail_in -= 2;
+ s->stream.next_in += 2;
+
+ /* Check the rest of the gzip header */
+ method = get_byte(s);
+ flags = get_byte(s);
+ if (method != Z_DEFLATED || (flags & RESERVED) != 0) {+ s->z_err = Z_DATA_ERROR;
+ return;
+ }
+
+ /* Discard time, xflags and OS code: */
+ for (len = 0; len < 6; len++) (void)get_byte(s);
+
+ if ((flags & EXTRA_FIELD) != 0) { /* skip the extra field */+ len = (uInt)get_byte(s);
+ len += ((uInt)get_byte(s))<<8;
+ /* len is garbage if EOF but the loop below will quit anyway */
+ while (len-- != 0 && get_byte(s) != EOF) ;
+ }
+ if ((flags & ORIG_NAME) != 0) { /* skip the original file name */+ while ((c = get_byte(s)) != 0 && c != EOF) ;
+ }
+ if ((flags & COMMENT) != 0) { /* skip the .gz file comment */+ while ((c = get_byte(s)) != 0 && c != EOF) ;
+ }
+ if ((flags & HEAD_CRC) != 0) { /* skip the header crc */+ for (len = 0; len < 2; len++) (void)get_byte(s);
+ }
+ s->z_err = s->z_eof ? Z_DATA_ERROR : Z_OK;
+}
+
+ /* ===========================================================================
+ * Cleanup then free the given gz_stream. Return a zlib error code.
+ Try freeing in the reverse order of allocations.
+ */
+local int destroy (s)
+ gz_stream *s;
+{+ int err = Z_OK;
+
+ if (!s) return Z_STREAM_ERROR;
+
+ TRYFREE(s->msg);
+
+ if (s->stream.state != NULL) {+ if (s->mode == 'w') {+#ifdef NO_GZCOMPRESS
+ err = Z_STREAM_ERROR;
+#else
+ err = deflateEnd(&(s->stream));
+#endif
+ } else if (s->mode == 'r') {+ err = inflateEnd(&(s->stream));
+ }
+ }
+ if (s->file != NULL && fclose(s->file)) {+#ifdef ESPIPE
+ if (errno != ESPIPE) /* fclose is broken for pipes in HP/UX */
+#endif
+ err = Z_ERRNO;
+ }
+ if (s->z_err < 0) err = s->z_err;
+
+ TRYFREE(s->inbuf);
+ TRYFREE(s->outbuf);
+ TRYFREE(s->path);
+ TRYFREE(s);
+ return err;
+}
+
+/* ===========================================================================
+ Reads the given number of uncompressed bytes from the compressed file.
+ gzread returns the number of bytes actually read (0 for end of file).
+*/
+int ZEXPORT gzread (file, buf, len)
+ gzFile file;
+ voidp buf;
+ unsigned len;
+{+ gz_stream *s = (gz_stream*)file;
+ Bytef *start = (Bytef*)buf; /* starting point for crc computation */
+ Byte *next_out; /* == stream.next_out but not forced far (for MSDOS) */
+
+ if (s == NULL || s->mode != 'r') return Z_STREAM_ERROR;
+
+ if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO) return -1;
+ if (s->z_err == Z_STREAM_END) return 0; /* EOF */
+
+ next_out = (Byte*)buf;
+ s->stream.next_out = (Bytef*)buf;
+ s->stream.avail_out = len;
+
+ if (s->stream.avail_out && s->back != EOF) {+ *next_out++ = s->back;
+ s->stream.next_out++;
+ s->stream.avail_out--;
+ s->back = EOF;
+ s->out++;
+ if (s->last) {+ s->z_err = Z_STREAM_END;
+ return 1;
+ }
+ }
+
+ while (s->stream.avail_out != 0) {+
+ if (s->transparent) {+ /* Copy first the lookahead bytes: */
+ uInt n = s->stream.avail_in;
+ if (n > s->stream.avail_out) n = s->stream.avail_out;
+ if (n > 0) {+ zmemcpy(s->stream.next_out, s->stream.next_in, n);
+ next_out += n;
+ s->stream.next_out = next_out;
+ s->stream.next_in += n;
+ s->stream.avail_out -= n;
+ s->stream.avail_in -= n;
+ }
+ if (s->stream.avail_out > 0) {+ s->stream.avail_out -= fread(next_out, 1, s->stream.avail_out,
+ s->file);
+ }
+ len -= s->stream.avail_out;
+ s->in += len;
+ s->out += len;
+ if (len == 0) s->z_eof = 1;
+ return (int)len;
+ }
+ if (s->stream.avail_in == 0 && !s->z_eof) {+
+ errno = 0;
+ s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file);
+ if (s->stream.avail_in == 0) {+ s->z_eof = 1;
+ if (ferror(s->file)) {+ s->z_err = Z_ERRNO;
+ break;
+ }
+ if (feof(s->file)) { /* avoid error for empty file */+ s->z_err = Z_STREAM_END;
+ break;
+ }
+ }
+ s->stream.next_in = s->inbuf;
+ }
+ s->in += s->stream.avail_in;
+ s->out += s->stream.avail_out;
+ s->z_err = inflate(&(s->stream), Z_NO_FLUSH);
+ s->in -= s->stream.avail_in;
+ s->out -= s->stream.avail_out;
+
+ if (s->z_err == Z_STREAM_END) {+ /* Check CRC and original size */
+ s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
+ start = s->stream.next_out;
+
+ if (getLong(s) != s->crc) {+ s->z_err = Z_DATA_ERROR;
+ } else {+ (void)getLong(s);
+ /* The uncompressed length returned by above getlong() may be
+ * different from s->out in case of concatenated .gz files.
+ * Check for such files:
+ */
+ check_header(s);
+ if (s->z_err == Z_OK) {+ inflateReset(&(s->stream));
+ s->crc = crc32(0L, Z_NULL, 0);
+ }
+ }
+ }
+ if (s->z_err != Z_OK || s->z_eof) break;
+ }
+ s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
+
+ return (int)(len - s->stream.avail_out);
+}
+
+
+/* ===========================================================================
+ Reads one byte from the compressed file. gzgetc returns this byte
+ or -1 in case of end of file or error.
+*/
+int ZEXPORT gzgetc(file)
+ gzFile file;
+{+ unsigned char c;
+
+ return gzread(file, &c, 1) == 1 ? c : -1;
+}
+
+
+/* ===========================================================================
+ Push one byte back onto the stream.
+*/
+int ZEXPORT gzungetc(c, file)
+ int c;
+ gzFile file;
+{+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || s->mode != 'r' || c == EOF || s->back != EOF) return EOF;
+ s->back = c;
+ s->out--;
+ s->last = (s->z_err == Z_STREAM_END);
+ if (s->last) s->z_err = Z_OK;
+ s->z_eof = 0;
+ return c;
+}
+
+
+/* ===========================================================================
+ Reads bytes from the compressed file until len-1 characters are
+ read, or a newline character is read and transferred to buf, or an
+ end-of-file condition is encountered. The string is then terminated
+ with a null character.
+ gzgets returns buf, or Z_NULL in case of error.
+
+ The current implementation is not optimized at all.
+*/
+char * ZEXPORT gzgets(file, buf, len)
+ gzFile file;
+ char *buf;
+ int len;
+{+ char *b = buf;
+ if (buf == Z_NULL || len <= 0) return Z_NULL;
+
+ while (--len > 0 && gzread(file, buf, 1) == 1 && *buf++ != '\n') ;
+ *buf = '\0';
+ return b == buf && len > 0 ? Z_NULL : b;
+}
+
+
+#ifndef NO_GZCOMPRESS
+/* ===========================================================================
+ Writes the given number of uncompressed bytes into the compressed file.
+ gzwrite returns the number of bytes actually written (0 in case of error).
+*/
+int ZEXPORT gzwrite (file, buf, len)
+ gzFile file;
+ voidpc buf;
+ unsigned len;
+{+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
+
+ s->stream.next_in = (Bytef*)buf;
+ s->stream.avail_in = len;
+
+ while (s->stream.avail_in != 0) {+
+ if (s->stream.avail_out == 0) {+
+ s->stream.next_out = s->outbuf;
+ if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {+ s->z_err = Z_ERRNO;
+ break;
+ }
+ s->stream.avail_out = Z_BUFSIZE;
+ }
+ s->in += s->stream.avail_in;
+ s->out += s->stream.avail_out;
+ s->z_err = deflate(&(s->stream), Z_NO_FLUSH);
+ s->in -= s->stream.avail_in;
+ s->out -= s->stream.avail_out;
+ if (s->z_err != Z_OK) break;
+ }
+ s->crc = crc32(s->crc, (const Bytef *)buf, len);
+
+ return (int)(len - s->stream.avail_in);
+}
+
+
+/* ===========================================================================
+ Converts, formats, and writes the args to the compressed file under
+ control of the format string, as in fprintf. gzprintf returns the number of
+ uncompressed bytes actually written (0 in case of error).
+*/
+#ifdef STDC
+#include <stdarg.h>
+
+int ZEXPORTVA gzprintf (gzFile file, const char *format, /* args */ ...)
+{+ char buf[Z_PRINTF_BUFSIZE];
+ va_list va;
+ int len;
+
+ buf[sizeof(buf) - 1] = 0;
+ va_start(va, format);
+#ifdef NO_vsnprintf
+# ifdef HAS_vsprintf_void
+ (void)vsprintf(buf, format, va);
+ va_end(va);
+ for (len = 0; len < sizeof(buf); len++)
+ if (buf[len] == 0) break;
+# else
+ len = vsprintf(buf, format, va);
+ va_end(va);
+# endif
+#else
+# ifdef HAS_vsnprintf_void
+ (void)vsnprintf(buf, sizeof(buf), format, va);
+ va_end(va);
+ len = strlen(buf);
+# else
+ len = vsnprintf(buf, sizeof(buf), format, va);
+ va_end(va);
+# endif
+#endif
+ if (len <= 0 || len >= (int)sizeof(buf) || buf[sizeof(buf) - 1] != 0)
+ return 0;
+ return gzwrite(file, buf, (unsigned)len);
+}
+#else /* not ANSI C */
+
+int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
+ a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)
+ gzFile file;
+ const char *format;
+ int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
+ a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
+{+ char buf[Z_PRINTF_BUFSIZE];
+ int len;
+
+ buf[sizeof(buf) - 1] = 0;
+#ifdef NO_snprintf
+# ifdef HAS_sprintf_void
+ sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+ for (len = 0; len < sizeof(buf); len++)
+ if (buf[len] == 0) break;
+# else
+ len = sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+# endif
+#else
+# ifdef HAS_snprintf_void
+ snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+ len = strlen(buf);
+# else
+ len = snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+# endif
+#endif
+ if (len <= 0 || len >= sizeof(buf) || buf[sizeof(buf) - 1] != 0)
+ return 0;
+ return gzwrite(file, buf, len);
+}
+#endif
+
+/* ===========================================================================
+ Writes c, converted to an unsigned char, into the compressed file.
+ gzputc returns the value that was written, or -1 in case of error.
+*/
+int ZEXPORT gzputc(file, c)
+ gzFile file;
+ int c;
+{+ unsigned char cc = (unsigned char) c; /* required for big endian systems */
+
+ return gzwrite(file, &cc, 1) == 1 ? (int)cc : -1;
+}
+
+
+/* ===========================================================================
+ Writes the given null-terminated string to the compressed file, excluding
+ the terminating null character.
+ gzputs returns the number of characters written, or -1 in case of error.
+*/
+int ZEXPORT gzputs(file, s)
+ gzFile file;
+ const char *s;
+{+ return gzwrite(file, (char*)s, (unsigned)strlen(s));
+}
+
+
+/* ===========================================================================
+ Flushes all pending output into the compressed file. The parameter
+ flush is as in the deflate() function.
+*/
+local int do_flush (file, flush)
+ gzFile file;
+ int flush;
+{+ uInt len;
+ int done = 0;
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
+
+ s->stream.avail_in = 0; /* should be zero already anyway */
+
+ for (;;) {+ len = Z_BUFSIZE - s->stream.avail_out;
+
+ if (len != 0) {+ if ((uInt)fwrite(s->outbuf, 1, len, s->file) != len) {+ s->z_err = Z_ERRNO;
+ return Z_ERRNO;
+ }
+ s->stream.next_out = s->outbuf;
+ s->stream.avail_out = Z_BUFSIZE;
+ }
+ if (done) break;
+ s->out += s->stream.avail_out;
+ s->z_err = deflate(&(s->stream), flush);
+ s->out -= s->stream.avail_out;
+
+ /* Ignore the second of two consecutive flushes: */
+ if (len == 0 && s->z_err == Z_BUF_ERROR) s->z_err = Z_OK;
+
+ /* deflate has finished flushing only when it hasn't used up
+ * all the available space in the output buffer:
+ */
+ done = (s->stream.avail_out != 0 || s->z_err == Z_STREAM_END);
+
+ if (s->z_err != Z_OK && s->z_err != Z_STREAM_END) break;
+ }
+ return s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
+}
+
+int ZEXPORT gzflush (file, flush)
+ gzFile file;
+ int flush;
+{+ gz_stream *s = (gz_stream*)file;
+ int err = do_flush (file, flush);
+
+ if (err) return err;
+ fflush(s->file);
+ return s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
+}
+#endif /* NO_GZCOMPRESS */
+
+/* ===========================================================================
+ Sets the starting position for the next gzread or gzwrite on the given
+ compressed file. The offset represents a number of bytes in the
+ gzseek returns the resulting offset location as measured in bytes from
+ the beginning of the uncompressed stream, or -1 in case of error.
+ SEEK_END is not implemented, returns error.
+ In this version of the library, gzseek can be extremely slow.
+*/
+z_off_t ZEXPORT gzseek (file, offset, whence)
+ gzFile file;
+ z_off_t offset;
+ int whence;
+{+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || whence == SEEK_END ||
+ s->z_err == Z_ERRNO || s->z_err == Z_DATA_ERROR) {+ return -1L;
+ }
+
+ if (s->mode == 'w') {+#ifdef NO_GZCOMPRESS
+ return -1L;
+#else
+ if (whence == SEEK_SET) {+ offset -= s->in;
+ }
+ if (offset < 0) return -1L;
+
+ /* At this point, offset is the number of zero bytes to write. */
+ if (s->inbuf == Z_NULL) {+ s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); /* for seeking */
+ if (s->inbuf == Z_NULL) return -1L;
+ zmemzero(s->inbuf, Z_BUFSIZE);
+ }
+ while (offset > 0) {+ uInt size = Z_BUFSIZE;
+ if (offset < Z_BUFSIZE) size = (uInt)offset;
+
+ size = gzwrite(file, s->inbuf, size);
+ if (size == 0) return -1L;
+
+ offset -= size;
+ }
+ return s->in;
+#endif
+ }
+ /* Rest of function is for reading only */
+
+ /* compute absolute position */
+ if (whence == SEEK_CUR) {+ offset += s->out;
+ }
+ if (offset < 0) return -1L;
+
+ if (s->transparent) {+ /* map to fseek */
+ s->back = EOF;
+ s->stream.avail_in = 0;
+ s->stream.next_in = s->inbuf;
+ if (fseek(s->file, offset, SEEK_SET) < 0) return -1L;
+
+ s->in = s->out = offset;
+ return offset;
+ }
+
+ /* For a negative seek, rewind and use positive seek */
+ if (offset >= s->out) {+ offset -= s->out;
+ } else if (gzrewind(file) < 0) {+ return -1L;
+ }
+ /* offset is now the number of bytes to skip. */
+
+ if (offset != 0 && s->outbuf == Z_NULL) {+ s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
+ if (s->outbuf == Z_NULL) return -1L;
+ }
+ if (offset && s->back != EOF) {+ s->back = EOF;
+ s->out++;
+ offset--;
+ if (s->last) s->z_err = Z_STREAM_END;
+ }
+ while (offset > 0) {+ int size = Z_BUFSIZE;
+ if (offset < Z_BUFSIZE) size = (int)offset;
+
+ size = gzread(file, s->outbuf, (uInt)size);
+ if (size <= 0) return -1L;
+ offset -= size;
+ }
+ return s->out;
+}
+
+/* ===========================================================================
+ Rewinds input file.
+*/
+int ZEXPORT gzrewind (file)
+ gzFile file;
+{+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || s->mode != 'r') return -1;
+
+ s->z_err = Z_OK;
+ s->z_eof = 0;
+ s->back = EOF;
+ s->stream.avail_in = 0;
+ s->stream.next_in = s->inbuf;
+ s->crc = crc32(0L, Z_NULL, 0);
+ if (!s->transparent) (void)inflateReset(&s->stream);
+ s->in = 0;
+ s->out = 0;
+ return fseek(s->file, s->start, SEEK_SET);
+}
+
+/* ===========================================================================
+ Returns the starting position for the next gzread or gzwrite on the
+ given compressed file. This position represents a number of bytes in the
+ uncompressed data stream.
+*/
+z_off_t ZEXPORT gztell (file)
+ gzFile file;
+{+ return gzseek(file, 0L, SEEK_CUR);
+}
+
+/* ===========================================================================
+ Returns 1 when EOF has previously been detected reading the given
+ input stream, otherwise zero.
+*/
+int ZEXPORT gzeof (file)
+ gzFile file;
+{+ gz_stream *s = (gz_stream*)file;
+
+ /* With concatenated compressed files that can have embedded
+ * crc trailers, z_eof is no longer the only/best indicator of EOF
+ * on a gz_stream. Handle end-of-stream error explicitly here.
+ */
+ if (s == NULL || s->mode != 'r') return 0;
+ if (s->z_eof) return 1;
+ return s->z_err == Z_STREAM_END;
+}
+
+/* ===========================================================================
+ Outputs a long in LSB order to the given file
+*/
+local void putLong (file, x)
+ FILE *file;
+ uLong x;
+{+ int n;
+ for (n = 0; n < 4; n++) {+ fputc((int)(x & 0xff), file);
+ x >>= 8;
+ }
+}
+
+/* ===========================================================================
+ Reads a long in LSB order from the given gz_stream. Sets z_err in case
+ of error.
+*/
+local uLong getLong (s)
+ gz_stream *s;
+{+ uLong x = (uLong)get_byte(s);
+ int c;
+
+ x += ((uLong)get_byte(s))<<8;
+ x += ((uLong)get_byte(s))<<16;
+ c = get_byte(s);
+ if (c == EOF) s->z_err = Z_DATA_ERROR;
+ x += ((uLong)c)<<24;
+ return x;
+}
+
+/* ===========================================================================
+ Flushes all pending output if necessary, closes the compressed file
+ and deallocates all the (de)compression state.
+*/
+int ZEXPORT gzclose (file)
+ gzFile file;
+{+ int err;
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL) return Z_STREAM_ERROR;
+
+ if (s->mode == 'w') {+#ifdef NO_GZCOMPRESS
+ return Z_STREAM_ERROR;
+#else
+ err = do_flush (file, Z_FINISH);
+ if (err != Z_OK) return destroy((gz_stream*)file);
+
+ putLong (s->file, s->crc);
+ putLong (s->file, (uLong)(s->in & 0xffffffff));
+#endif
+ }
+ return destroy((gz_stream*)file);
+}
+
+/* ===========================================================================
+ Returns the error message for the last error which occured on the
+ given compressed file. errnum is set to zlib error number. If an
+ error occured in the file system and not in the compression library,
+ errnum is set to Z_ERRNO and the application may consult errno
+ to get the exact error code.
+*/
+const char * ZEXPORT gzerror (file, errnum)
+ gzFile file;
+ int *errnum;
+{+ char *m;
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL) {+ *errnum = Z_STREAM_ERROR;
+ return (const char*)ERR_MSG(Z_STREAM_ERROR);
+ }
+ *errnum = s->z_err;
+ if (*errnum == Z_OK) return (const char*)"";
+
+ m = (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg);
+
+ if (m == NULL || *m == '\0') m = (char*)ERR_MSG(s->z_err);
+
+ TRYFREE(s->msg);
+ s->msg = (char*)ALLOC(strlen(s->path) + strlen(m) + 3);
+ if (s->msg == Z_NULL) return (const char*)ERR_MSG(Z_MEM_ERROR);
+ strcpy(s->msg, s->path);
+ strcat(s->msg, ": ");
+ strcat(s->msg, m);
+ return (const char*)s->msg;
+}
+
+/* ===========================================================================
+ Clear the error and end-of-file flags, and do the same for the real file.
+*/
+void ZEXPORT gzclearerr (file)
+ gzFile file;
+{+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL) return;
+ if (s->z_err != Z_STREAM_END) s->z_err = Z_OK;
+ s->z_eof = 0;
+ clearerr(s->file);
+}
--- /dev/null
+++ b/src/gfx/zlib/infback.c
@@ -1,0 +1,622 @@
+/* infback.c -- inflate using a call-back interface
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/*
+ This code is largely copied from inflate.c. Normally either infback.o or
+ inflate.o would be linked into an application--not both. The interface
+ with inffast.c is retained so that optimized assembler-coded versions of
+ inflate_fast() can be used with either inflate.c or infback.c.
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+#include "inflate.h"
+#include "inffast.h"
+
+/* function prototypes */
+local void fixedtables OF((struct inflate_state FAR *state));
+
+/*
+ strm provides memory allocation functions in zalloc and zfree, or
+ Z_NULL to use the library memory allocation functions.
+
+ windowBits is in the range 8..15, and window is a user-supplied
+ window and output buffer that is 2**windowBits bytes.
+ */
+int ZEXPORT inflateBackInit_(strm, windowBits, window, version, stream_size)
+z_stream FAR *strm;
+int windowBits;
+unsigned char FAR *window;
+const char *version;
+int stream_size;
+{+ struct inflate_state FAR *state;
+
+ if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
+ stream_size != (int)(sizeof(z_stream)))
+ return Z_VERSION_ERROR;
+ if (strm == Z_NULL || window == Z_NULL ||
+ windowBits < 8 || windowBits > 15)
+ return Z_STREAM_ERROR;
+ strm->msg = Z_NULL; /* in case we return an error */
+ if (strm->zalloc == (alloc_func)0) {+ strm->zalloc = zcalloc;
+ strm->opaque = (voidpf)0;
+ }
+ if (strm->zfree == (free_func)0) strm->zfree = zcfree;
+ state = (struct inflate_state FAR *)ZALLOC(strm, 1,
+ sizeof(struct inflate_state));
+ if (state == Z_NULL) return Z_MEM_ERROR;
+ Tracev((stderr, "inflate: allocated\n"));
+ strm->state = (voidpf)state;
+ state->wbits = windowBits;
+ state->wsize = 1U << windowBits;
+ state->window = window;
+ state->write = 0;
+ state->whave = 0;
+ return Z_OK;
+}
+
+/*
+ Return state with length and distance decoding tables and index sizes set to
+ fixed code decoding. Normally this returns fixed tables from inffixed.h.
+ If BUILDFIXED is defined, then instead this routine builds the tables the
+ first time it's called, and returns those tables the first time and
+ thereafter. This reduces the size of the code by about 2K bytes, in
+ exchange for a little execution time. However, BUILDFIXED should not be
+ used for threaded applications, since the rewriting of the tables and virgin
+ may not be thread-safe.
+ */
+local void fixedtables(state)
+struct inflate_state FAR *state;
+{+#ifdef BUILDFIXED
+ static int virgin = 1;
+ static code *lenfix, *distfix;
+ static code fixed[544];
+
+ /* build fixed huffman tables if first call (may not be thread safe) */
+ if (virgin) {+ unsigned sym, bits;
+ static code *next;
+
+ /* literal/length table */
+ sym = 0;
+ while (sym < 144) state->lens[sym++] = 8;
+ while (sym < 256) state->lens[sym++] = 9;
+ while (sym < 280) state->lens[sym++] = 7;
+ while (sym < 288) state->lens[sym++] = 8;
+ next = fixed;
+ lenfix = next;
+ bits = 9;
+ inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
+
+ /* distance table */
+ sym = 0;
+ while (sym < 32) state->lens[sym++] = 5;
+ distfix = next;
+ bits = 5;
+ inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
+
+ /* do this just once */
+ virgin = 0;
+ }
+#else /* !BUILDFIXED */
+# include "inffixed.h"
+#endif /* BUILDFIXED */
+ state->lencode = lenfix;
+ state->lenbits = 9;
+ state->distcode = distfix;
+ state->distbits = 5;
+}
+
+/* Macros for inflateBack(): */
+
+/* Load returned state from inflate_fast() */
+#define LOAD() \
+ do { \+ put = strm->next_out; \
+ left = strm->avail_out; \
+ next = strm->next_in; \
+ have = strm->avail_in; \
+ hold = state->hold; \
+ bits = state->bits; \
+ } while (0)
+
+/* Set state from registers for inflate_fast() */
+#define RESTORE() \
+ do { \+ strm->next_out = put; \
+ strm->avail_out = left; \
+ strm->next_in = next; \
+ strm->avail_in = have; \
+ state->hold = hold; \
+ state->bits = bits; \
+ } while (0)
+
+/* Clear the input bit accumulator */
+#define INITBITS() \
+ do { \+ hold = 0; \
+ bits = 0; \
+ } while (0)
+
+/* Assure that some input is available. If input is requested, but denied,
+ then return a Z_BUF_ERROR from inflateBack(). */
+#define PULL() \
+ do { \+ if (have == 0) { \+ have = in(in_desc, &next); \
+ if (have == 0) { \+ next = Z_NULL; \
+ ret = Z_BUF_ERROR; \
+ goto inf_leave; \
+ } \
+ } \
+ } while (0)
+
+/* Get a byte of input into the bit accumulator, or return from inflateBack()
+ with an error if there is no input available. */
+#define PULLBYTE() \
+ do { \+ PULL(); \
+ have--; \
+ hold += (unsigned long)(*next++) << bits; \
+ bits += 8; \
+ } while (0)
+
+/* Assure that there are at least n bits in the bit accumulator. If there is
+ not enough available input to do that, then return from inflateBack() with
+ an error. */
+#define NEEDBITS(n) \
+ do { \+ while (bits < (unsigned)(n)) \
+ PULLBYTE(); \
+ } while (0)
+
+/* Return the low n bits of the bit accumulator (n < 16) */
+#define BITS(n) \
+ ((unsigned)hold & ((1U << (n)) - 1))
+
+/* Remove n bits from the bit accumulator */
+#define DROPBITS(n) \
+ do { \+ hold >>= (n); \
+ bits -= (unsigned)(n); \
+ } while (0)
+
+/* Remove zero to seven bits as needed to go to a byte boundary */
+#define BYTEBITS() \
+ do { \+ hold >>= bits & 7; \
+ bits -= bits & 7; \
+ } while (0)
+
+/* Assure that some output space is available, by writing out the window
+ if it's full. If the write fails, return from inflateBack() with a
+ Z_BUF_ERROR. */
+#define ROOM() \
+ do { \+ if (left == 0) { \+ put = state->window; \
+ left = state->wsize; \
+ state->whave = left; \
+ if (out(out_desc, put, left)) { \+ ret = Z_BUF_ERROR; \
+ goto inf_leave; \
+ } \
+ } \
+ } while (0)
+
+/*
+ strm provides the memory allocation functions and window buffer on input,
+ and provides information on the unused input on return. For Z_DATA_ERROR
+ returns, strm will also provide an error message.
+
+ in() and out() are the call-back input and output functions. When
+ inflateBack() needs more input, it calls in(). When inflateBack() has
+ filled the window with output, or when it completes with data in the
+ window, it calls out() to write out the data. The application must not
+ change the provided input until in() is called again or inflateBack()
+ returns. The application must not change the window/output buffer until
+ inflateBack() returns.
+
+ in() and out() are called with a descriptor parameter provided in the
+ inflateBack() call. This parameter can be a structure that provides the
+ information required to do the read or write, as well as accumulated
+ information on the input and output such as totals and check values.
+
+ in() should return zero on failure. out() should return non-zero on
+ failure. If either in() or out() fails, than inflateBack() returns a
+ Z_BUF_ERROR. strm->next_in can be checked for Z_NULL to see whether it
+ was in() or out() that caused in the error. Otherwise, inflateBack()
+ returns Z_STREAM_END on success, Z_DATA_ERROR for an deflate format
+ error, or Z_MEM_ERROR if it could not allocate memory for the state.
+ inflateBack() can also return Z_STREAM_ERROR if the input parameters
+ are not correct, i.e. strm is Z_NULL or the state was not initialized.
+ */
+int ZEXPORT inflateBack(strm, in, in_desc, out, out_desc)
+z_stream FAR *strm;
+in_func in;
+void FAR *in_desc;
+out_func out;
+void FAR *out_desc;
+{+ struct inflate_state FAR *state;
+ unsigned char FAR *next; /* next input */
+ unsigned char FAR *put; /* next output */
+ unsigned have, left; /* available input and output */
+ unsigned long hold; /* bit buffer */
+ unsigned bits; /* bits in bit buffer */
+ unsigned copy; /* number of stored or match bytes to copy */
+ unsigned char FAR *from; /* where to copy match bytes from */
+ code this; /* current decoding table entry */
+ code last; /* parent table entry */
+ unsigned len; /* length to copy for repeats, bits to drop */
+ int ret; /* return code */
+ static const unsigned short order[19] = /* permutation of code lengths */
+ {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};+
+ /* Check that the strm exists and that the state was initialized */
+ if (strm == Z_NULL || strm->state == Z_NULL)
+ return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+
+ /* Reset the state */
+ strm->msg = Z_NULL;
+ state->mode = TYPE;
+ state->last = 0;
+ state->whave = 0;
+ next = strm->next_in;
+ have = next != Z_NULL ? strm->avail_in : 0;
+ hold = 0;
+ bits = 0;
+ put = state->window;
+ left = state->wsize;
+
+ /* Inflate until end of block marked as last */
+ for (;;)
+ switch (state->mode) {+ case TYPE:
+ /* determine and dispatch block type */
+ if (state->last) {+ BYTEBITS();
+ state->mode = DONE;
+ break;
+ }
+ NEEDBITS(3);
+ state->last = BITS(1);
+ DROPBITS(1);
+ switch (BITS(2)) {+ case 0: /* stored block */
+ Tracev((stderr, "inflate: stored block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = STORED;
+ break;
+ case 1: /* fixed block */
+ fixedtables(state);
+ Tracev((stderr, "inflate: fixed codes block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = LEN; /* decode codes */
+ break;
+ case 2: /* dynamic block */
+ Tracev((stderr, "inflate: dynamic codes block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = TABLE;
+ break;
+ case 3:
+ strm->msg = (char *)"invalid block type";
+ state->mode = BAD;
+ }
+ DROPBITS(2);
+ break;
+
+ case STORED:
+ /* get and verify stored block length */
+ BYTEBITS(); /* go to byte boundary */
+ NEEDBITS(32);
+ if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {+ strm->msg = (char *)"invalid stored block lengths";
+ state->mode = BAD;
+ break;
+ }
+ state->length = (unsigned)hold & 0xffff;
+ Tracev((stderr, "inflate: stored length %u\n",
+ state->length));
+ INITBITS();
+
+ /* copy stored block from input to output */
+ while (state->length != 0) {+ copy = state->length;
+ PULL();
+ ROOM();
+ if (copy > have) copy = have;
+ if (copy > left) copy = left;
+ zmemcpy(put, next, copy);
+ have -= copy;
+ next += copy;
+ left -= copy;
+ put += copy;
+ state->length -= copy;
+ }
+ Tracev((stderr, "inflate: stored end\n"));
+ state->mode = TYPE;
+ break;
+
+ case TABLE:
+ /* get dynamic table entries descriptor */
+ NEEDBITS(14);
+ state->nlen = BITS(5) + 257;
+ DROPBITS(5);
+ state->ndist = BITS(5) + 1;
+ DROPBITS(5);
+ state->ncode = BITS(4) + 4;
+ DROPBITS(4);
+#ifndef PKZIP_BUG_WORKAROUND
+ if (state->nlen > 286 || state->ndist > 30) {+ strm->msg = (char *)"too many length or distance symbols";
+ state->mode = BAD;
+ break;
+ }
+#endif
+ Tracev((stderr, "inflate: table sizes ok\n"));
+
+ /* get code length code lengths (not a typo) */
+ state->have = 0;
+ while (state->have < state->ncode) {+ NEEDBITS(3);
+ state->lens[order[state->have++]] = (unsigned short)BITS(3);
+ DROPBITS(3);
+ }
+ while (state->have < 19)
+ state->lens[order[state->have++]] = 0;
+ state->next = state->codes;
+ state->lencode = (code const FAR *)(state->next);
+ state->lenbits = 7;
+ ret = inflate_table(CODES, state->lens, 19, &(state->next),
+ &(state->lenbits), state->work);
+ if (ret) {+ strm->msg = (char *)"invalid code lengths set";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: code lengths ok\n"));
+
+ /* get length and distance code code lengths */
+ state->have = 0;
+ while (state->have < state->nlen + state->ndist) {+ for (;;) {+ this = state->lencode[BITS(state->lenbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if (this.val < 16) {+ NEEDBITS(this.bits);
+ DROPBITS(this.bits);
+ state->lens[state->have++] = this.val;
+ }
+ else {+ if (this.val == 16) {+ NEEDBITS(this.bits + 2);
+ DROPBITS(this.bits);
+ if (state->have == 0) {+ strm->msg = (char *)"invalid bit length repeat";
+ state->mode = BAD;
+ break;
+ }
+ len = (unsigned)(state->lens[state->have - 1]);
+ copy = 3 + BITS(2);
+ DROPBITS(2);
+ }
+ else if (this.val == 17) {+ NEEDBITS(this.bits + 3);
+ DROPBITS(this.bits);
+ len = 0;
+ copy = 3 + BITS(3);
+ DROPBITS(3);
+ }
+ else {+ NEEDBITS(this.bits + 7);
+ DROPBITS(this.bits);
+ len = 0;
+ copy = 11 + BITS(7);
+ DROPBITS(7);
+ }
+ if (state->have + copy > state->nlen + state->ndist) {+ strm->msg = (char *)"invalid bit length repeat";
+ state->mode = BAD;
+ break;
+ }
+ while (copy--)
+ state->lens[state->have++] = (unsigned short)len;
+ }
+ }
+
+ /* handle error breaks in while */
+ if (state->mode == BAD) break;
+
+ /* build code tables */
+ state->next = state->codes;
+ state->lencode = (code const FAR *)(state->next);
+ state->lenbits = 9;
+ ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
+ &(state->lenbits), state->work);
+ if (ret) {+ strm->msg = (char *)"invalid literal/lengths set";
+ state->mode = BAD;
+ break;
+ }
+ state->distcode = (code const FAR *)(state->next);
+ state->distbits = 6;
+ ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
+ &(state->next), &(state->distbits), state->work);
+ if (ret) {+ strm->msg = (char *)"invalid distances set";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: codes ok\n"));
+ state->mode = LEN;
+
+ case LEN:
+ /* use inflate_fast() if we have enough input and output */
+ if (have >= 6 && left >= 258) {+ RESTORE();
+ if (state->whave < state->wsize)
+ state->whave = state->wsize - left;
+ inflate_fast(strm, state->wsize);
+ LOAD();
+ break;
+ }
+
+ /* get a literal, length, or end-of-block code */
+ for (;;) {+ this = state->lencode[BITS(state->lenbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if (this.op && (this.op & 0xf0) == 0) {+ last = this;
+ for (;;) {+ this = state->lencode[last.val +
+ (BITS(last.bits + last.op) >> last.bits)];
+ if ((unsigned)(last.bits + this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ DROPBITS(last.bits);
+ }
+ DROPBITS(this.bits);
+ state->length = (unsigned)this.val;
+
+ /* process literal */
+ if (this.op == 0) {+ Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
+ "inflate: literal '%c'\n" :
+ "inflate: literal 0x%02x\n", this.val));
+ ROOM();
+ *put++ = (unsigned char)(state->length);
+ left--;
+ state->mode = LEN;
+ break;
+ }
+
+ /* process end of block */
+ if (this.op & 32) {+ Tracevv((stderr, "inflate: end of block\n"));
+ state->mode = TYPE;
+ break;
+ }
+
+ /* invalid code */
+ if (this.op & 64) {+ strm->msg = (char *)"invalid literal/length code";
+ state->mode = BAD;
+ break;
+ }
+
+ /* length code -- get extra bits, if any */
+ state->extra = (unsigned)(this.op) & 15;
+ if (state->extra != 0) {+ NEEDBITS(state->extra);
+ state->length += BITS(state->extra);
+ DROPBITS(state->extra);
+ }
+ Tracevv((stderr, "inflate: length %u\n", state->length));
+
+ /* get distance code */
+ for (;;) {+ this = state->distcode[BITS(state->distbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if ((this.op & 0xf0) == 0) {+ last = this;
+ for (;;) {+ this = state->distcode[last.val +
+ (BITS(last.bits + last.op) >> last.bits)];
+ if ((unsigned)(last.bits + this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ DROPBITS(last.bits);
+ }
+ DROPBITS(this.bits);
+ if (this.op & 64) {+ strm->msg = (char *)"invalid distance code";
+ state->mode = BAD;
+ break;
+ }
+ state->offset = (unsigned)this.val;
+
+ /* get distance extra bits, if any */
+ state->extra = (unsigned)(this.op) & 15;
+ if (state->extra != 0) {+ NEEDBITS(state->extra);
+ state->offset += BITS(state->extra);
+ DROPBITS(state->extra);
+ }
+ if (state->offset > state->wsize - (state->whave < state->wsize ?
+ left : 0)) {+ strm->msg = (char *)"invalid distance too far back";
+ state->mode = BAD;
+ break;
+ }
+ Tracevv((stderr, "inflate: distance %u\n", state->offset));
+
+ /* copy match from window to output */
+ do {+ ROOM();
+ copy = state->wsize - state->offset;
+ if (copy < left) {+ from = put + copy;
+ copy = left - copy;
+ }
+ else {+ from = put - state->offset;
+ copy = left;
+ }
+ if (copy > state->length) copy = state->length;
+ state->length -= copy;
+ left -= copy;
+ do {+ *put++ = *from++;
+ } while (--copy);
+ } while (state->length != 0);
+ break;
+
+ case DONE:
+ /* inflate stream terminated properly -- write leftover output */
+ ret = Z_STREAM_END;
+ if (left < state->wsize) {+ if (out(out_desc, state->window, state->wsize - left))
+ ret = Z_BUF_ERROR;
+ }
+ goto inf_leave;
+
+ case BAD:
+ ret = Z_DATA_ERROR;
+ goto inf_leave;
+
+ default: /* can't happen, but makes compilers happy */
+ ret = Z_STREAM_ERROR;
+ goto inf_leave;
+ }
+
+ /* Return unused input */
+ inf_leave:
+ strm->next_in = next;
+ strm->avail_in = have;
+ return ret;
+}
+
+int ZEXPORT inflateBackEnd(strm)
+z_stream FAR *strm;
+{+ if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
+ return Z_STREAM_ERROR;
+ ZFREE(strm, strm->state);
+ strm->state = Z_NULL;
+ Tracev((stderr, "inflate: end\n"));
+ return Z_OK;
+}
--- /dev/null
+++ b/src/gfx/zlib/inffast.c
@@ -1,0 +1,305 @@
+/* inffast.c -- fast decoding
+ * Copyright (C) 1995-2004 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+#include "inflate.h"
+#include "inffast.h"
+
+#ifndef ASMINF
+
+/* Allow machine dependent optimization for post-increment or pre-increment.
+ Based on testing to date,
+ Pre-increment preferred for:
+ - PowerPC G3 (Adler)
+ - MIPS R5000 (Randers-Pehrson)
+ Post-increment preferred for:
+ - none
+ No measurable difference:
+ - Pentium III (Anderson)
+ - M68060 (Nikl)
+ */
+#ifdef POSTINC
+# define OFF 0
+# define PUP(a) *(a)++
+#else
+# define OFF 1
+# define PUP(a) *++(a)
+#endif
+
+/*
+ Decode literal, length, and distance codes and write out the resulting
+ literal and match bytes until either not enough input or output is
+ available, an end-of-block is encountered, or a data error is encountered.
+ When large enough input and output buffers are supplied to inflate(), for
+ example, a 16K input buffer and a 64K output buffer, more than 95% of the
+ inflate execution time is spent in this routine.
+
+ Entry assumptions:
+
+ state->mode == LEN
+ strm->avail_in >= 6
+ strm->avail_out >= 258
+ start >= strm->avail_out
+ state->bits < 8
+
+ On return, state->mode is one of:
+
+ LEN -- ran out of enough output space or enough available input
+ TYPE -- reached end of block code, inflate() to interpret next block
+ BAD -- error in block data
+
+ Notes:
+
+ - The maximum input bits used by a length/distance pair is 15 bits for the
+ length code, 5 bits for the length extra, 15 bits for the distance code,
+ and 13 bits for the distance extra. This totals 48 bits, or six bytes.
+ Therefore if strm->avail_in >= 6, then there is enough input to avoid
+ checking for available input while decoding.
+
+ - The maximum bytes that a single length/distance pair can output is 258
+ bytes, which is the maximum length that can be coded. inflate_fast()
+ requires strm->avail_out >= 258 for each loop to avoid checking for
+ output space.
+ */
+void inflate_fast(strm, start)
+z_streamp strm;
+unsigned start; /* inflate()'s starting value for strm->avail_out */
+{+ struct inflate_state FAR *state;
+ unsigned char FAR *in; /* local strm->next_in */
+ unsigned char FAR *last; /* while in < last, enough input available */
+ unsigned char FAR *out; /* local strm->next_out */
+ unsigned char FAR *beg; /* inflate()'s initial strm->next_out */
+ unsigned char FAR *end; /* while out < end, enough space available */
+ unsigned wsize; /* window size or zero if not using window */
+ unsigned whave; /* valid bytes in the window */
+ unsigned write; /* window write index */
+ unsigned char FAR *window; /* allocated sliding window, if wsize != 0 */
+ unsigned long hold; /* local strm->hold */
+ unsigned bits; /* local strm->bits */
+ code const FAR *lcode; /* local strm->lencode */
+ code const FAR *dcode; /* local strm->distcode */
+ unsigned lmask; /* mask for first level of length codes */
+ unsigned dmask; /* mask for first level of distance codes */
+ code this; /* retrieved table entry */
+ unsigned op; /* code bits, operation, extra bits, or */
+ /* window position, window bytes to copy */
+ unsigned len; /* match length, unused bytes */
+ unsigned dist; /* match distance */
+ unsigned char FAR *from; /* where to copy match from */
+
+ /* copy state to local variables */
+ state = (struct inflate_state FAR *)strm->state;
+ in = strm->next_in - OFF;
+ last = in + (strm->avail_in - 5);
+ out = strm->next_out - OFF;
+ beg = out - (start - strm->avail_out);
+ end = out + (strm->avail_out - 257);
+ wsize = state->wsize;
+ whave = state->whave;
+ write = state->write;
+ window = state->window;
+ hold = state->hold;
+ bits = state->bits;
+ lcode = state->lencode;
+ dcode = state->distcode;
+ lmask = (1U << state->lenbits) - 1;
+ dmask = (1U << state->distbits) - 1;
+
+ /* decode literals and length/distances until end-of-block or not enough
+ input data or output space */
+ do {+ if (bits < 15) {+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ }
+ this = lcode[hold & lmask];
+ dolen:
+ op = (unsigned)(this.bits);
+ hold >>= op;
+ bits -= op;
+ op = (unsigned)(this.op);
+ if (op == 0) { /* literal */+ Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
+ "inflate: literal '%c'\n" :
+ "inflate: literal 0x%02x\n", this.val));
+ PUP(out) = (unsigned char)(this.val);
+ }
+ else if (op & 16) { /* length base */+ len = (unsigned)(this.val);
+ op &= 15; /* number of extra bits */
+ if (op) {+ if (bits < op) {+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ }
+ len += (unsigned)hold & ((1U << op) - 1);
+ hold >>= op;
+ bits -= op;
+ }
+ Tracevv((stderr, "inflate: length %u\n", len));
+ if (bits < 15) {+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ }
+ this = dcode[hold & dmask];
+ dodist:
+ op = (unsigned)(this.bits);
+ hold >>= op;
+ bits -= op;
+ op = (unsigned)(this.op);
+ if (op & 16) { /* distance base */+ dist = (unsigned)(this.val);
+ op &= 15; /* number of extra bits */
+ if (bits < op) {+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ if (bits < op) {+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ }
+ }
+ dist += (unsigned)hold & ((1U << op) - 1);
+ hold >>= op;
+ bits -= op;
+ Tracevv((stderr, "inflate: distance %u\n", dist));
+ op = (unsigned)(out - beg); /* max distance in output */
+ if (dist > op) { /* see if copy from window */+ op = dist - op; /* distance back in window */
+ if (op > whave) {+ strm->msg = (char *)"invalid distance too far back";
+ state->mode = BAD;
+ break;
+ }
+ from = window - OFF;
+ if (write == 0) { /* very common case */+ from += wsize - op;
+ if (op < len) { /* some from window */+ len -= op;
+ do {+ PUP(out) = PUP(from);
+ } while (--op);
+ from = out - dist; /* rest from output */
+ }
+ }
+ else if (write < op) { /* wrap around window */+ from += wsize + write - op;
+ op -= write;
+ if (op < len) { /* some from end of window */+ len -= op;
+ do {+ PUP(out) = PUP(from);
+ } while (--op);
+ from = window - OFF;
+ if (write < len) { /* some from start of window */+ op = write;
+ len -= op;
+ do {+ PUP(out) = PUP(from);
+ } while (--op);
+ from = out - dist; /* rest from output */
+ }
+ }
+ }
+ else { /* contiguous in window */+ from += write - op;
+ if (op < len) { /* some from window */+ len -= op;
+ do {+ PUP(out) = PUP(from);
+ } while (--op);
+ from = out - dist; /* rest from output */
+ }
+ }
+ while (len > 2) {+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ len -= 3;
+ }
+ if (len) {+ PUP(out) = PUP(from);
+ if (len > 1)
+ PUP(out) = PUP(from);
+ }
+ }
+ else {+ from = out - dist; /* copy direct from output */
+ do { /* minimum length is three */+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ len -= 3;
+ } while (len > 2);
+ if (len) {+ PUP(out) = PUP(from);
+ if (len > 1)
+ PUP(out) = PUP(from);
+ }
+ }
+ }
+ else if ((op & 64) == 0) { /* 2nd level distance code */+ this = dcode[this.val + (hold & ((1U << op) - 1))];
+ goto dodist;
+ }
+ else {+ strm->msg = (char *)"invalid distance code";
+ state->mode = BAD;
+ break;
+ }
+ }
+ else if ((op & 64) == 0) { /* 2nd level length code */+ this = lcode[this.val + (hold & ((1U << op) - 1))];
+ goto dolen;
+ }
+ else if (op & 32) { /* end-of-block */+ Tracevv((stderr, "inflate: end of block\n"));
+ state->mode = TYPE;
+ break;
+ }
+ else {+ strm->msg = (char *)"invalid literal/length code";
+ state->mode = BAD;
+ break;
+ }
+ } while (in < last && out < end);
+
+ /* return unused bytes (on entry, bits < 8, so in won't go too far back) */
+ len = bits >> 3;
+ in -= len;
+ bits -= len << 3;
+ hold &= (1U << bits) - 1;
+
+ /* update state and return */
+ strm->next_in = in + OFF;
+ strm->next_out = out + OFF;
+ strm->avail_in = (unsigned)(in < last ? 5 + (last - in) : 5 - (in - last));
+ strm->avail_out = (unsigned)(out < end ?
+ 257 + (end - out) : 257 - (out - end));
+ state->hold = hold;
+ state->bits = bits;
+ return;
+}
+
+/*
+ inflate_fast() speedups that turned out slower (on a PowerPC G3 750CXe):
+ - Using bit fields for code structure
+ - Different op definition to avoid & for extra bits (do & for table bits)
+ - Three separate decoding do-loops for direct, window, and write == 0
+ - Special case for distance > 1 copies to do overlapped load and store copy
+ - Explicit branch predictions (based on measured branch probabilities)
+ - Deferring match copy and interspersed it with decoding subsequent codes
+ - Swapping literal/length else
+ - Swapping window/direct else
+ - Larger unrolled copy loops (three is about right)
+ - Moving len -= 3 statement into middle of loop
+ */
+
+#endif /* !ASMINF */
--- /dev/null
+++ b/src/gfx/zlib/inffast.h
@@ -1,0 +1,11 @@
+/* inffast.h -- header to use inffast.c
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+ part of the implementation of the compression library and is
+ subject to change. Applications should only use zlib.h.
+ */
+
+void inflate_fast OF((z_streamp strm, unsigned start));
--- /dev/null
+++ b/src/gfx/zlib/inffixed.h
@@ -1,0 +1,94 @@
+ /* inffixed.h -- table for decoding fixed codes
+ * Generated automatically by makefixed().
+ */
+
+ /* WARNING: this file should *not* be used by applications. It
+ is part of the implementation of the compression library and
+ is subject to change. Applications should only use zlib.h.
+ */
+
+ static const code lenfix[512] = {+ {96,7,0},{0,8,80},{0,8,16},{20,8,115},{18,7,31},{0,8,112},{0,8,48},+ {0,9,192},{16,7,10},{0,8,96},{0,8,32},{0,9,160},{0,8,0},{0,8,128},+ {0,8,64},{0,9,224},{16,7,6},{0,8,88},{0,8,24},{0,9,144},{19,7,59},+ {0,8,120},{0,8,56},{0,9,208},{17,7,17},{0,8,104},{0,8,40},{0,9,176},+ {0,8,8},{0,8,136},{0,8,72},{0,9,240},{16,7,4},{0,8,84},{0,8,20},+ {21,8,227},{19,7,43},{0,8,116},{0,8,52},{0,9,200},{17,7,13},{0,8,100},+ {0,8,36},{0,9,168},{0,8,4},{0,8,132},{0,8,68},{0,9,232},{16,7,8},+ {0,8,92},{0,8,28},{0,9,152},{20,7,83},{0,8,124},{0,8,60},{0,9,216},+ {18,7,23},{0,8,108},{0,8,44},{0,9,184},{0,8,12},{0,8,140},{0,8,76},+ {0,9,248},{16,7,3},{0,8,82},{0,8,18},{21,8,163},{19,7,35},{0,8,114},+ {0,8,50},{0,9,196},{17,7,11},{0,8,98},{0,8,34},{0,9,164},{0,8,2},+ {0,8,130},{0,8,66},{0,9,228},{16,7,7},{0,8,90},{0,8,26},{0,9,148},+ {20,7,67},{0,8,122},{0,8,58},{0,9,212},{18,7,19},{0,8,106},{0,8,42},+ {0,9,180},{0,8,10},{0,8,138},{0,8,74},{0,9,244},{16,7,5},{0,8,86},+ {0,8,22},{64,8,0},{19,7,51},{0,8,118},{0,8,54},{0,9,204},{17,7,15},+ {0,8,102},{0,8,38},{0,9,172},{0,8,6},{0,8,134},{0,8,70},{0,9,236},+ {16,7,9},{0,8,94},{0,8,30},{0,9,156},{20,7,99},{0,8,126},{0,8,62},+ {0,9,220},{18,7,27},{0,8,110},{0,8,46},{0,9,188},{0,8,14},{0,8,142},+ {0,8,78},{0,9,252},{96,7,0},{0,8,81},{0,8,17},{21,8,131},{18,7,31},+ {0,8,113},{0,8,49},{0,9,194},{16,7,10},{0,8,97},{0,8,33},{0,9,162},+ {0,8,1},{0,8,129},{0,8,65},{0,9,226},{16,7,6},{0,8,89},{0,8,25},+ {0,9,146},{19,7,59},{0,8,121},{0,8,57},{0,9,210},{17,7,17},{0,8,105},+ {0,8,41},{0,9,178},{0,8,9},{0,8,137},{0,8,73},{0,9,242},{16,7,4},+ {0,8,85},{0,8,21},{16,8,258},{19,7,43},{0,8,117},{0,8,53},{0,9,202},+ {17,7,13},{0,8,101},{0,8,37},{0,9,170},{0,8,5},{0,8,133},{0,8,69},+ {0,9,234},{16,7,8},{0,8,93},{0,8,29},{0,9,154},{20,7,83},{0,8,125},+ {0,8,61},{0,9,218},{18,7,23},{0,8,109},{0,8,45},{0,9,186},{0,8,13},+ {0,8,141},{0,8,77},{0,9,250},{16,7,3},{0,8,83},{0,8,19},{21,8,195},+ {19,7,35},{0,8,115},{0,8,51},{0,9,198},{17,7,11},{0,8,99},{0,8,35},+ {0,9,166},{0,8,3},{0,8,131},{0,8,67},{0,9,230},{16,7,7},{0,8,91},+ {0,8,27},{0,9,150},{20,7,67},{0,8,123},{0,8,59},{0,9,214},{18,7,19},+ {0,8,107},{0,8,43},{0,9,182},{0,8,11},{0,8,139},{0,8,75},{0,9,246},+ {16,7,5},{0,8,87},{0,8,23},{64,8,0},{19,7,51},{0,8,119},{0,8,55},+ {0,9,206},{17,7,15},{0,8,103},{0,8,39},{0,9,174},{0,8,7},{0,8,135},+ {0,8,71},{0,9,238},{16,7,9},{0,8,95},{0,8,31},{0,9,158},{20,7,99},+ {0,8,127},{0,8,63},{0,9,222},{18,7,27},{0,8,111},{0,8,47},{0,9,190},+ {0,8,15},{0,8,143},{0,8,79},{0,9,254},{96,7,0},{0,8,80},{0,8,16},+ {20,8,115},{18,7,31},{0,8,112},{0,8,48},{0,9,193},{16,7,10},{0,8,96},+ {0,8,32},{0,9,161},{0,8,0},{0,8,128},{0,8,64},{0,9,225},{16,7,6},+ {0,8,88},{0,8,24},{0,9,145},{19,7,59},{0,8,120},{0,8,56},{0,9,209},+ {17,7,17},{0,8,104},{0,8,40},{0,9,177},{0,8,8},{0,8,136},{0,8,72},+ {0,9,241},{16,7,4},{0,8,84},{0,8,20},{21,8,227},{19,7,43},{0,8,116},+ {0,8,52},{0,9,201},{17,7,13},{0,8,100},{0,8,36},{0,9,169},{0,8,4},+ {0,8,132},{0,8,68},{0,9,233},{16,7,8},{0,8,92},{0,8,28},{0,9,153},+ {20,7,83},{0,8,124},{0,8,60},{0,9,217},{18,7,23},{0,8,108},{0,8,44},+ {0,9,185},{0,8,12},{0,8,140},{0,8,76},{0,9,249},{16,7,3},{0,8,82},+ {0,8,18},{21,8,163},{19,7,35},{0,8,114},{0,8,50},{0,9,197},{17,7,11},+ {0,8,98},{0,8,34},{0,9,165},{0,8,2},{0,8,130},{0,8,66},{0,9,229},+ {16,7,7},{0,8,90},{0,8,26},{0,9,149},{20,7,67},{0,8,122},{0,8,58},+ {0,9,213},{18,7,19},{0,8,106},{0,8,42},{0,9,181},{0,8,10},{0,8,138},+ {0,8,74},{0,9,245},{16,7,5},{0,8,86},{0,8,22},{64,8,0},{19,7,51},+ {0,8,118},{0,8,54},{0,9,205},{17,7,15},{0,8,102},{0,8,38},{0,9,173},+ {0,8,6},{0,8,134},{0,8,70},{0,9,237},{16,7,9},{0,8,94},{0,8,30},+ {0,9,157},{20,7,99},{0,8,126},{0,8,62},{0,9,221},{18,7,27},{0,8,110},+ {0,8,46},{0,9,189},{0,8,14},{0,8,142},{0,8,78},{0,9,253},{96,7,0},+ {0,8,81},{0,8,17},{21,8,131},{18,7,31},{0,8,113},{0,8,49},{0,9,195},+ {16,7,10},{0,8,97},{0,8,33},{0,9,163},{0,8,1},{0,8,129},{0,8,65},+ {0,9,227},{16,7,6},{0,8,89},{0,8,25},{0,9,147},{19,7,59},{0,8,121},+ {0,8,57},{0,9,211},{17,7,17},{0,8,105},{0,8,41},{0,9,179},{0,8,9},+ {0,8,137},{0,8,73},{0,9,243},{16,7,4},{0,8,85},{0,8,21},{16,8,258},+ {19,7,43},{0,8,117},{0,8,53},{0,9,203},{17,7,13},{0,8,101},{0,8,37},+ {0,9,171},{0,8,5},{0,8,133},{0,8,69},{0,9,235},{16,7,8},{0,8,93},+ {0,8,29},{0,9,155},{20,7,83},{0,8,125},{0,8,61},{0,9,219},{18,7,23},+ {0,8,109},{0,8,45},{0,9,187},{0,8,13},{0,8,141},{0,8,77},{0,9,251},+ {16,7,3},{0,8,83},{0,8,19},{21,8,195},{19,7,35},{0,8,115},{0,8,51},+ {0,9,199},{17,7,11},{0,8,99},{0,8,35},{0,9,167},{0,8,3},{0,8,131},+ {0,8,67},{0,9,231},{16,7,7},{0,8,91},{0,8,27},{0,9,151},{20,7,67},+ {0,8,123},{0,8,59},{0,9,215},{18,7,19},{0,8,107},{0,8,43},{0,9,183},+ {0,8,11},{0,8,139},{0,8,75},{0,9,247},{16,7,5},{0,8,87},{0,8,23},+ {64,8,0},{19,7,51},{0,8,119},{0,8,55},{0,9,207},{17,7,15},{0,8,103},+ {0,8,39},{0,9,175},{0,8,7},{0,8,135},{0,8,71},{0,9,239},{16,7,9},+ {0,8,95},{0,8,31},{0,9,159},{20,7,99},{0,8,127},{0,8,63},{0,9,223},+ {18,7,27},{0,8,111},{0,8,47},{0,9,191},{0,8,15},{0,8,143},{0,8,79},+ {0,9,255}+ };
+
+ static const code distfix[32] = {+ {16,5,1},{23,5,257},{19,5,17},{27,5,4097},{17,5,5},{25,5,1025},+ {21,5,65},{29,5,16385},{16,5,3},{24,5,513},{20,5,33},{28,5,8193},+ {18,5,9},{26,5,2049},{22,5,129},{64,5,0},{16,5,2},{23,5,385},+ {19,5,25},{27,5,6145},{17,5,7},{25,5,1537},{21,5,97},{29,5,24577},+ {16,5,4},{24,5,769},{20,5,49},{28,5,12289},{18,5,13},{26,5,3073},+ {22,5,193},{64,5,0}+ };
--- /dev/null
+++ b/src/gfx/zlib/inflate.c
@@ -1,0 +1,1269 @@
+/* inflate.c -- zlib decompression
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/*
+ * Change history:
+ *
+ * 1.2.beta0 24 Nov 2002
+ * - First version -- complete rewrite of inflate to simplify code, avoid
+ * creation of window when not needed, minimize use of window when it is
+ * needed, make inffast.c even faster, implement gzip decoding, and to
+ * improve code readability and style over the previous zlib inflate code
+ *
+ * 1.2.beta1 25 Nov 2002
+ * - Use pointers for available input and output checking in inffast.c
+ * - Remove input and output counters in inffast.c
+ * - Change inffast.c entry and loop from avail_in >= 7 to >= 6
+ * - Remove unnecessary second byte pull from length extra in inffast.c
+ * - Unroll direct copy to three copies per loop in inffast.c
+ *
+ * 1.2.beta2 4 Dec 2002
+ * - Change external routine names to reduce potential conflicts
+ * - Correct filename to inffixed.h for fixed tables in inflate.c
+ * - Make hbuf[] unsigned char to match parameter type in inflate.c
+ * - Change strm->next_out[-state->offset] to *(strm->next_out - state->offset)
+ * to avoid negation problem on Alphas (64 bit) in inflate.c
+ *
+ * 1.2.beta3 22 Dec 2002
+ * - Add comments on state->bits assertion in inffast.c
+ * - Add comments on op field in inftrees.h
+ * - Fix bug in reuse of allocated window after inflateReset()
+ * - Remove bit fields--back to byte structure for speed
+ * - Remove distance extra == 0 check in inflate_fast()--only helps for lengths
+ * - Change post-increments to pre-increments in inflate_fast(), PPC biased?
+ * - Add compile time option, POSTINC, to use post-increments instead (Intel?)
+ * - Make MATCH copy in inflate() much faster for when inflate_fast() not used
+ * - Use local copies of stream next and avail values, as well as local bit
+ * buffer and bit count in inflate()--for speed when inflate_fast() not used
+ *
+ * 1.2.beta4 1 Jan 2003
+ * - Split ptr - 257 statements in inflate_table() to avoid compiler warnings
+ * - Move a comment on output buffer sizes from inffast.c to inflate.c
+ * - Add comments in inffast.c to introduce the inflate_fast() routine
+ * - Rearrange window copies in inflate_fast() for speed and simplification
+ * - Unroll last copy for window match in inflate_fast()
+ * - Use local copies of window variables in inflate_fast() for speed
+ * - Pull out common write == 0 case for speed in inflate_fast()
+ * - Make op and len in inflate_fast() unsigned for consistency
+ * - Add FAR to lcode and dcode declarations in inflate_fast()
+ * - Simplified bad distance check in inflate_fast()
+ * - Added inflateBackInit(), inflateBack(), and inflateBackEnd() in new
+ * source file infback.c to provide a call-back interface to inflate for
+ * programs like gzip and unzip -- uses window as output buffer to avoid
+ * window copying
+ *
+ * 1.2.beta5 1 Jan 2003
+ * - Improved inflateBack() interface to allow the caller to provide initial
+ * input in strm.
+ * - Fixed stored blocks bug in inflateBack()
+ *
+ * 1.2.beta6 4 Jan 2003
+ * - Added comments in inffast.c on effectiveness of POSTINC
+ * - Typecasting all around to reduce compiler warnings
+ * - Changed loops from while (1) or do {} while (1) to for (;;), again to+ * make compilers happy
+ * - Changed type of window in inflateBackInit() to unsigned char *
+ *
+ * 1.2.beta7 27 Jan 2003
+ * - Changed many types to unsigned or unsigned short to avoid warnings
+ * - Added inflateCopy() function
+ *
+ * 1.2.0 9 Mar 2003
+ * - Changed inflateBack() interface to provide separate opaque descriptors
+ * for the in() and out() functions
+ * - Changed inflateBack() argument and in_func typedef to swap the length
+ * and buffer address return values for the input function
+ * - Check next_in and next_out for Z_NULL on entry to inflate()
+ *
+ * The history for versions after 1.2.0 are in ChangeLog in zlib distribution.
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+#include "inflate.h"
+#include "inffast.h"
+
+#ifdef MAKEFIXED
+# ifndef BUILDFIXED
+# define BUILDFIXED
+# endif
+#endif
+
+/* function prototypes */
+local void fixedtables OF((struct inflate_state FAR *state));
+local int updatewindow OF((z_streamp strm, unsigned out));
+#ifdef BUILDFIXED
+ void makefixed OF((void));
+#endif
+local unsigned syncsearch OF((unsigned FAR *have, unsigned char FAR *buf,
+ unsigned len));
+
+int ZEXPORT inflateReset(z_streamp strm)
+{+ struct inflate_state FAR *state;
+
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ strm->total_in = strm->total_out = state->total = 0;
+ strm->msg = Z_NULL;
+ strm->adler = 1; /* to support ill-conceived Java test suite */
+ state->mode = HEAD;
+ state->last = 0;
+ state->havedict = 0;
+ state->wsize = 0;
+ state->whave = 0;
+ state->hold = 0;
+ state->bits = 0;
+ state->lencode = state->distcode = state->next = state->codes;
+ Tracev((stderr, "inflate: reset\n"));
+ return Z_OK;
+}
+
+int ZEXPORT inflateInit2_(z_streamp strm, int windowBits, const char *version, int stream_size)
+{+ struct inflate_state FAR *state;
+
+ if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
+ stream_size != (int)(sizeof(z_stream)))
+ return Z_VERSION_ERROR;
+ if (strm == Z_NULL) return Z_STREAM_ERROR;
+ strm->msg = Z_NULL; /* in case we return an error */
+ if (strm->zalloc == (alloc_func)0) {+ strm->zalloc = zcalloc;
+ strm->opaque = (voidpf)0;
+ }
+ if (strm->zfree == (free_func)0) strm->zfree = zcfree;
+ state = (struct inflate_state FAR *)
+ ZALLOC(strm, 1, sizeof(struct inflate_state));
+ if (state == Z_NULL) return Z_MEM_ERROR;
+ Tracev((stderr, "inflate: allocated\n"));
+ strm->state = (voidpf)state;
+ if (windowBits < 0) {+ state->wrap = 0;
+ windowBits = -windowBits;
+ }
+ else {+ state->wrap = (windowBits >> 4) + 1;
+#ifdef GUNZIP
+ if (windowBits < 48) windowBits &= 15;
+#endif
+ }
+ if (windowBits < 8 || windowBits > 15) {+ ZFREE(strm, state);
+ strm->state = Z_NULL;
+ return Z_STREAM_ERROR;
+ }
+ state->wbits = (unsigned)windowBits;
+ state->window = Z_NULL;
+ return inflateReset(strm);
+}
+
+int ZEXPORT inflateInit_(strm, version, stream_size)
+z_streamp strm;
+const char *version;
+int stream_size;
+{+ return inflateInit2_(strm, DEF_WBITS, version, stream_size);
+}
+
+/*
+ Return state with length and distance decoding tables and index sizes set to
+ fixed code decoding. Normally this returns fixed tables from inffixed.h.
+ If BUILDFIXED is defined, then instead this routine builds the tables the
+ first time it's called, and returns those tables the first time and
+ thereafter. This reduces the size of the code by about 2K bytes, in
+ exchange for a little execution time. However, BUILDFIXED should not be
+ used for threaded applications, since the rewriting of the tables and virgin
+ may not be thread-safe.
+ */
+local void fixedtables(state)
+struct inflate_state FAR *state;
+{+#ifdef BUILDFIXED
+ static int virgin = 1;
+ static code *lenfix, *distfix;
+ static code fixed[544];
+
+ /* build fixed huffman tables if first call (may not be thread safe) */
+ if (virgin) {+ unsigned sym, bits;
+ static code *next;
+
+ /* literal/length table */
+ sym = 0;
+ while (sym < 144) state->lens[sym++] = 8;
+ while (sym < 256) state->lens[sym++] = 9;
+ while (sym < 280) state->lens[sym++] = 7;
+ while (sym < 288) state->lens[sym++] = 8;
+ next = fixed;
+ lenfix = next;
+ bits = 9;
+ inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
+
+ /* distance table */
+ sym = 0;
+ while (sym < 32) state->lens[sym++] = 5;
+ distfix = next;
+ bits = 5;
+ inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
+
+ /* do this just once */
+ virgin = 0;
+ }
+#else /* !BUILDFIXED */
+# include "inffixed.h"
+#endif /* BUILDFIXED */
+ state->lencode = lenfix;
+ state->lenbits = 9;
+ state->distcode = distfix;
+ state->distbits = 5;
+}
+
+#ifdef MAKEFIXED
+#include <stdio.h>
+
+/*
+ Write out the inffixed.h that is #include'd above. Defining MAKEFIXED also
+ defines BUILDFIXED, so the tables are built on the fly. makefixed() writes
+ those tables to stdout, which would be piped to inffixed.h. A small program
+ can simply call makefixed to do this:
+
+ void makefixed(void);
+
+ int main(void)
+ {+ makefixed();
+ return 0;
+ }
+
+ Then that can be linked with zlib built with MAKEFIXED defined and run:
+
+ a.out > inffixed.h
+ */
+void makefixed()
+{+ unsigned low, size;
+ struct inflate_state state;
+
+ fixedtables(&state);
+ puts(" /* inffixed.h -- table for decoding fixed codes");+ puts(" * Generated automatically by makefixed().");+ puts(" */");+ puts("");+ puts(" /* WARNING: this file should *not* be used by applications.");+ puts(" It is part of the implementation of this library and is");+ puts(" subject to change. Applications should only use zlib.h.");+ puts(" */");+ puts("");+ size = 1U << 9;
+ printf(" static const code lenfix[%u] = {", size);+ low = 0;
+ for (;;) {+ if ((low % 7) == 0) printf("\n ");+ printf("{%u,%u,%d}", state.lencode[low].op, state.lencode[low].bits,+ state.lencode[low].val);
+ if (++low == size) break;
+ putchar(',');+ }
+ puts("\n };");+ size = 1U << 5;
+ printf("\n static const code distfix[%u] = {", size);+ low = 0;
+ for (;;) {+ if ((low % 6) == 0) printf("\n ");+ printf("{%u,%u,%d}", state.distcode[low].op, state.distcode[low].bits,+ state.distcode[low].val);
+ if (++low == size) break;
+ putchar(',');+ }
+ puts("\n };");+}
+#endif /* MAKEFIXED */
+
+/*
+ Update the window with the last wsize (normally 32K) bytes written before
+ returning. If window does not exist yet, create it. This is only called
+ when a window is already in use, or when output has been written during this
+ inflate call, but the end of the deflate stream has not been reached yet.
+ It is also called to create a window for dictionary data when a dictionary
+ is loaded.
+
+ Providing output buffers larger than 32K to inflate() should provide a speed
+ advantage, since only the last 32K of output is copied to the sliding window
+ upon return from inflate(), and since all distances after the first 32K of
+ output will fall in the output data, making match copies simpler and faster.
+ The advantage may be dependent on the size of the processor's data caches.
+ */
+local int updatewindow(strm, out)
+z_streamp strm;
+unsigned out;
+{+ struct inflate_state FAR *state;
+ unsigned copy, dist;
+
+ state = (struct inflate_state FAR *)strm->state;
+
+ /* if it hasn't been done already, allocate space for the window */
+ if (state->window == Z_NULL) {+ state->window = (unsigned char FAR *)
+ ZALLOC(strm, 1U << state->wbits,
+ sizeof(unsigned char));
+ if (state->window == Z_NULL) return 1;
+ }
+
+ /* if window not in use yet, initialize */
+ if (state->wsize == 0) {+ state->wsize = 1U << state->wbits;
+ state->write = 0;
+ state->whave = 0;
+ }
+
+ /* copy state->wsize or less output bytes into the circular window */
+ copy = out - strm->avail_out;
+ if (copy >= state->wsize) {+ zmemcpy(state->window, strm->next_out - state->wsize, state->wsize);
+ state->write = 0;
+ state->whave = state->wsize;
+ }
+ else {+ dist = state->wsize - state->write;
+ if (dist > copy) dist = copy;
+ zmemcpy(state->window + state->write, strm->next_out - copy, dist);
+ copy -= dist;
+ if (copy) {+ zmemcpy(state->window, strm->next_out - copy, copy);
+ state->write = copy;
+ state->whave = state->wsize;
+ }
+ else {+ state->write += dist;
+ if (state->write == state->wsize) state->write = 0;
+ if (state->whave < state->wsize) state->whave += dist;
+ }
+ }
+ return 0;
+}
+
+/* Macros for inflate(): */
+
+/* check function to use adler32() for zlib or crc32() for gzip */
+#ifdef GUNZIP
+# define UPDATE(check, buf, len) \
+ (state->flags ? crc32(check, buf, len) : adler32(check, buf, len))
+#else
+# define UPDATE(check, buf, len) adler32(check, buf, len)
+#endif
+
+/* check macros for header crc */
+#ifdef GUNZIP
+# define CRC2(check, word) \
+ do { \+ hbuf[0] = (unsigned char)(word); \
+ hbuf[1] = (unsigned char)((word) >> 8); \
+ check = crc32(check, hbuf, 2); \
+ } while (0)
+
+# define CRC4(check, word) \
+ do { \+ hbuf[0] = (unsigned char)(word); \
+ hbuf[1] = (unsigned char)((word) >> 8); \
+ hbuf[2] = (unsigned char)((word) >> 16); \
+ hbuf[3] = (unsigned char)((word) >> 24); \
+ check = crc32(check, hbuf, 4); \
+ } while (0)
+#endif
+
+/* Load registers with state in inflate() for speed */
+#define LOAD() \
+ do { \+ put = strm->next_out; \
+ left = strm->avail_out; \
+ next = strm->next_in; \
+ have = strm->avail_in; \
+ hold = state->hold; \
+ bits = state->bits; \
+ } while (0)
+
+/* Restore state from registers in inflate() */
+#define RESTORE() \
+ do { \+ strm->next_out = put; \
+ strm->avail_out = left; \
+ strm->next_in = next; \
+ strm->avail_in = have; \
+ state->hold = hold; \
+ state->bits = bits; \
+ } while (0)
+
+/* Clear the input bit accumulator */
+#define INITBITS() \
+ do { \+ hold = 0; \
+ bits = 0; \
+ } while (0)
+
+/* Get a byte of input into the bit accumulator, or return from inflate()
+ if there is no input available. */
+#define PULLBYTE() \
+ do { \+ if (have == 0) goto inf_leave; \
+ have--; \
+ hold += (unsigned long)(*next++) << bits; \
+ bits += 8; \
+ } while (0)
+
+/* Assure that there are at least n bits in the bit accumulator. If there is
+ not enough available input to do that, then return from inflate(). */
+#define NEEDBITS(n) \
+ do { \+ while (bits < (unsigned)(n)) \
+ PULLBYTE(); \
+ } while (0)
+
+/* Return the low n bits of the bit accumulator (n < 16) */
+#define BITS(n) \
+ ((unsigned)hold & ((1U << (n)) - 1))
+
+/* Remove n bits from the bit accumulator */
+#define DROPBITS(n) \
+ do { \+ hold >>= (n); \
+ bits -= (unsigned)(n); \
+ } while (0)
+
+/* Remove zero to seven bits as needed to go to a byte boundary */
+#define BYTEBITS() \
+ do { \+ hold >>= bits & 7; \
+ bits -= bits & 7; \
+ } while (0)
+
+/* Reverse the bytes in a 32-bit value */
+#define REVERSE(q) \
+ ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
+ (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
+
+/*
+ inflate() uses a state machine to process as much input data and generate as
+ much output data as possible before returning. The state machine is
+ structured roughly as follows:
+
+ for (;;) switch (state) {+ ...
+ case STATEn:
+ if (not enough input data or output space to make progress)
+ return;
+ ... make progress ...
+ state = STATEm;
+ break;
+ ...
+ }
+
+ so when inflate() is called again, the same case is attempted again, and
+ if the appropriate resources are provided, the machine proceeds to the
+ next state. The NEEDBITS() macro is usually the way the state evaluates
+ whether it can proceed or should return. NEEDBITS() does the return if
+ the requested bits are not available. The typical use of the BITS macros
+ is:
+
+ NEEDBITS(n);
+ ... do something with BITS(n) ...
+ DROPBITS(n);
+
+ where NEEDBITS(n) either returns from inflate() if there isn't enough
+ input left to load n bits into the accumulator, or it continues. BITS(n)
+ gives the low n bits in the accumulator. When done, DROPBITS(n) drops
+ the low n bits off the accumulator. INITBITS() clears the accumulator
+ and sets the number of available bits to zero. BYTEBITS() discards just
+ enough bits to put the accumulator on a byte boundary. After BYTEBITS()
+ and a NEEDBITS(8), then BITS(8) would return the next byte in the stream.
+
+ NEEDBITS(n) uses PULLBYTE() to get an available byte of input, or to return
+ if there is no input available. The decoding of variable length codes uses
+ PULLBYTE() directly in order to pull just enough bytes to decode the next
+ code, and no more.
+
+ Some states loop until they get enough input, making sure that enough
+ state information is maintained to continue the loop where it left off
+ if NEEDBITS() returns in the loop. For example, want, need, and keep
+ would all have to actually be part of the saved state in case NEEDBITS()
+ returns:
+
+ case STATEw:
+ while (want < need) {+ NEEDBITS(n);
+ keep[want++] = BITS(n);
+ DROPBITS(n);
+ }
+ state = STATEx;
+ case STATEx:
+
+ As shown above, if the next state is also the next case, then the break
+ is omitted.
+
+ A state may also return if there is not enough output space available to
+ complete that state. Those states are copying stored data, writing a
+ literal byte, and copying a matching string.
+
+ When returning, a "goto inf_leave" is used to update the total counters,
+ update the check value, and determine whether any progress has been made
+ during that inflate() call in order to return the proper return code.
+ Progress is defined as a change in either strm->avail_in or strm->avail_out.
+ When there is a window, goto inf_leave will update the window with the last
+ output written. If a goto inf_leave occurs in the middle of decompression
+ and there is no window currently, goto inf_leave will create one and copy
+ output to the window for the next call of inflate().
+
+ In this implementation, the flush parameter of inflate() only affects the
+ return code (per zlib.h). inflate() always writes as much as possible to
+ strm->next_out, given the space available and the provided input--the effect
+ documented in zlib.h of Z_SYNC_FLUSH. Furthermore, inflate() always defers
+ the allocation of and copying into a sliding window until necessary, which
+ provides the effect documented in zlib.h for Z_FINISH when the entire input
+ stream available. So the only thing the flush parameter actually does is:
+ when flush is set to Z_FINISH, inflate() cannot return Z_OK. Instead it
+ will return Z_BUF_ERROR if it has not reached the end of the stream.
+ */
+
+int ZEXPORT inflate(strm, flush)
+z_streamp strm;
+int flush;
+{+ struct inflate_state FAR *state;
+ unsigned char FAR *next; /* next input */
+ unsigned char FAR *put; /* next output */
+ unsigned have, left; /* available input and output */
+ unsigned long hold; /* bit buffer */
+ unsigned bits; /* bits in bit buffer */
+ unsigned in, out; /* save starting available input and output */
+ unsigned copy; /* number of stored or match bytes to copy */
+ unsigned char FAR *from; /* where to copy match bytes from */
+ code this; /* current decoding table entry */
+ code last; /* parent table entry */
+ unsigned len; /* length to copy for repeats, bits to drop */
+ int ret; /* return code */
+#ifdef GUNZIP
+ unsigned char hbuf[4]; /* buffer for gzip header crc calculation */
+#endif
+ static const unsigned short order[19] = /* permutation of code lengths */
+ {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};+
+ if (strm == Z_NULL || strm->state == Z_NULL || strm->next_out == Z_NULL ||
+ (strm->next_in == Z_NULL && strm->avail_in != 0))
+ return Z_STREAM_ERROR;
+
+ state = (struct inflate_state FAR *)strm->state;
+ if (state->mode == TYPE) state->mode = TYPEDO; /* skip check */
+ LOAD();
+ in = have;
+ out = left;
+ ret = Z_OK;
+ for (;;)
+ switch (state->mode) {+ case HEAD:
+ if (state->wrap == 0) {+ state->mode = TYPEDO;
+ break;
+ }
+ NEEDBITS(16);
+#ifdef GUNZIP
+ if ((state->wrap & 2) && hold == 0x8b1f) { /* gzip header */+ state->check = crc32(0L, Z_NULL, 0);
+ CRC2(state->check, hold);
+ INITBITS();
+ state->mode = FLAGS;
+ break;
+ }
+ state->flags = 0; /* expect zlib header */
+ if (!(state->wrap & 1) || /* check if zlib header allowed */
+#else
+ if (
+#endif
+ ((BITS(8) << 8) + (hold >> 8)) % 31) {+ strm->msg = (char *)"incorrect header check";
+ state->mode = BAD;
+ break;
+ }
+ if (BITS(4) != Z_DEFLATED) {+ strm->msg = (char *)"unknown compression method";
+ state->mode = BAD;
+ break;
+ }
+ DROPBITS(4);
+ if (BITS(4) + 8 > state->wbits) {+ strm->msg = (char *)"invalid window size";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: zlib header ok\n"));
+ strm->adler = state->check = adler32(0L, Z_NULL, 0);
+ state->mode = hold & 0x200 ? DICTID : TYPE;
+ INITBITS();
+ break;
+#ifdef GUNZIP
+ case FLAGS:
+ NEEDBITS(16);
+ state->flags = (int)(hold);
+ if ((state->flags & 0xff) != Z_DEFLATED) {+ strm->msg = (char *)"unknown compression method";
+ state->mode = BAD;
+ break;
+ }
+ if (state->flags & 0xe000) {+ strm->msg = (char *)"unknown header flags set";
+ state->mode = BAD;
+ break;
+ }
+ if (state->flags & 0x0200) CRC2(state->check, hold);
+ INITBITS();
+ state->mode = TIME;
+ case TIME:
+ NEEDBITS(32);
+ if (state->flags & 0x0200) CRC4(state->check, hold);
+ INITBITS();
+ state->mode = OS;
+ case OS:
+ NEEDBITS(16);
+ if (state->flags & 0x0200) CRC2(state->check, hold);
+ INITBITS();
+ state->mode = EXLEN;
+ case EXLEN:
+ if (state->flags & 0x0400) {+ NEEDBITS(16);
+ state->length = (unsigned)(hold);
+ if (state->flags & 0x0200) CRC2(state->check, hold);
+ INITBITS();
+ }
+ state->mode = EXTRA;
+ case EXTRA:
+ if (state->flags & 0x0400) {+ copy = state->length;
+ if (copy > have) copy = have;
+ if (copy) {+ if (state->flags & 0x0200)
+ state->check = crc32(state->check, next, copy);
+ have -= copy;
+ next += copy;
+ state->length -= copy;
+ }
+ if (state->length) goto inf_leave;
+ }
+ state->mode = NAME;
+ case NAME:
+ if (state->flags & 0x0800) {+ if (have == 0) goto inf_leave;
+ copy = 0;
+ do {+ len = (unsigned)(next[copy++]);
+ } while (len && copy < have);
+ if (state->flags & 0x02000)
+ state->check = crc32(state->check, next, copy);
+ have -= copy;
+ next += copy;
+ if (len) goto inf_leave;
+ }
+ state->mode = COMMENT;
+ case COMMENT:
+ if (state->flags & 0x1000) {+ if (have == 0) goto inf_leave;
+ copy = 0;
+ do {+ len = (unsigned)(next[copy++]);
+ } while (len && copy < have);
+ if (state->flags & 0x02000)
+ state->check = crc32(state->check, next, copy);
+ have -= copy;
+ next += copy;
+ if (len) goto inf_leave;
+ }
+ state->mode = HCRC;
+ case HCRC:
+ if (state->flags & 0x0200) {+ NEEDBITS(16);
+ if (hold != (state->check & 0xffff)) {+ strm->msg = (char *)"header crc mismatch";
+ state->mode = BAD;
+ break;
+ }
+ INITBITS();
+ }
+ strm->adler = state->check = crc32(0L, Z_NULL, 0);
+ state->mode = TYPE;
+ break;
+#endif
+ case DICTID:
+ NEEDBITS(32);
+ strm->adler = state->check = REVERSE(hold);
+ INITBITS();
+ state->mode = DICT;
+ case DICT:
+ if (state->havedict == 0) {+ RESTORE();
+ return Z_NEED_DICT;
+ }
+ strm->adler = state->check = adler32(0L, Z_NULL, 0);
+ state->mode = TYPE;
+ case TYPE:
+ if (flush == Z_BLOCK) goto inf_leave;
+ case TYPEDO:
+ if (state->last) {+ BYTEBITS();
+ state->mode = CHECK;
+ break;
+ }
+ NEEDBITS(3);
+ state->last = BITS(1);
+ DROPBITS(1);
+ switch (BITS(2)) {+ case 0: /* stored block */
+ Tracev((stderr, "inflate: stored block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = STORED;
+ break;
+ case 1: /* fixed block */
+ fixedtables(state);
+ Tracev((stderr, "inflate: fixed codes block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = LEN; /* decode codes */
+ break;
+ case 2: /* dynamic block */
+ Tracev((stderr, "inflate: dynamic codes block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = TABLE;
+ break;
+ case 3:
+ strm->msg = (char *)"invalid block type";
+ state->mode = BAD;
+ }
+ DROPBITS(2);
+ break;
+ case STORED:
+ BYTEBITS(); /* go to byte boundary */
+ NEEDBITS(32);
+ if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {+ strm->msg = (char *)"invalid stored block lengths";
+ state->mode = BAD;
+ break;
+ }
+ state->length = (unsigned)hold & 0xffff;
+ Tracev((stderr, "inflate: stored length %u\n",
+ state->length));
+ INITBITS();
+ state->mode = COPY;
+ case COPY:
+ copy = state->length;
+ if (copy) {+ if (copy > have) copy = have;
+ if (copy > left) copy = left;
+ if (copy == 0) goto inf_leave;
+ zmemcpy(put, next, copy);
+ have -= copy;
+ next += copy;
+ left -= copy;
+ put += copy;
+ state->length -= copy;
+ break;
+ }
+ Tracev((stderr, "inflate: stored end\n"));
+ state->mode = TYPE;
+ break;
+ case TABLE:
+ NEEDBITS(14);
+ state->nlen = BITS(5) + 257;
+ DROPBITS(5);
+ state->ndist = BITS(5) + 1;
+ DROPBITS(5);
+ state->ncode = BITS(4) + 4;
+ DROPBITS(4);
+#ifndef PKZIP_BUG_WORKAROUND
+ if (state->nlen > 286 || state->ndist > 30) {+ strm->msg = (char *)"too many length or distance symbols";
+ state->mode = BAD;
+ break;
+ }
+#endif
+ Tracev((stderr, "inflate: table sizes ok\n"));
+ state->have = 0;
+ state->mode = LENLENS;
+ case LENLENS:
+ while (state->have < state->ncode) {+ NEEDBITS(3);
+ state->lens[order[state->have++]] = (unsigned short)BITS(3);
+ DROPBITS(3);
+ }
+ while (state->have < 19)
+ state->lens[order[state->have++]] = 0;
+ state->next = state->codes;
+ state->lencode = (code const FAR *)(state->next);
+ state->lenbits = 7;
+ ret = inflate_table(CODES, state->lens, 19, &(state->next),
+ &(state->lenbits), state->work);
+ if (ret) {+ strm->msg = (char *)"invalid code lengths set";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: code lengths ok\n"));
+ state->have = 0;
+ state->mode = CODELENS;
+ case CODELENS:
+ while (state->have < state->nlen + state->ndist) {+ for (;;) {+ this = state->lencode[BITS(state->lenbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if (this.val < 16) {+ NEEDBITS(this.bits);
+ DROPBITS(this.bits);
+ state->lens[state->have++] = this.val;
+ }
+ else {+ if (this.val == 16) {+ NEEDBITS(this.bits + 2);
+ DROPBITS(this.bits);
+ if (state->have == 0) {+ strm->msg = (char *)"invalid bit length repeat";
+ state->mode = BAD;
+ break;
+ }
+ len = state->lens[state->have - 1];
+ copy = 3 + BITS(2);
+ DROPBITS(2);
+ }
+ else if (this.val == 17) {+ NEEDBITS(this.bits + 3);
+ DROPBITS(this.bits);
+ len = 0;
+ copy = 3 + BITS(3);
+ DROPBITS(3);
+ }
+ else {+ NEEDBITS(this.bits + 7);
+ DROPBITS(this.bits);
+ len = 0;
+ copy = 11 + BITS(7);
+ DROPBITS(7);
+ }
+ if (state->have + copy > state->nlen + state->ndist) {+ strm->msg = (char *)"invalid bit length repeat";
+ state->mode = BAD;
+ break;
+ }
+ while (copy--)
+ state->lens[state->have++] = (unsigned short)len;
+ }
+ }
+
+ /* handle error breaks in while */
+ if (state->mode == BAD) break;
+
+ /* build code tables */
+ state->next = state->codes;
+ state->lencode = (code const FAR *)(state->next);
+ state->lenbits = 9;
+ ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
+ &(state->lenbits), state->work);
+ if (ret) {+ strm->msg = (char *)"invalid literal/lengths set";
+ state->mode = BAD;
+ break;
+ }
+ state->distcode = (code const FAR *)(state->next);
+ state->distbits = 6;
+ ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
+ &(state->next), &(state->distbits), state->work);
+ if (ret) {+ strm->msg = (char *)"invalid distances set";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: codes ok\n"));
+ state->mode = LEN;
+ case LEN:
+ if (have >= 6 && left >= 258) {+ RESTORE();
+ inflate_fast(strm, out);
+ LOAD();
+ break;
+ }
+ for (;;) {+ this = state->lencode[BITS(state->lenbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if (this.op && (this.op & 0xf0) == 0) {+ last = this;
+ for (;;) {+ this = state->lencode[last.val +
+ (BITS(last.bits + last.op) >> last.bits)];
+ if ((unsigned)(last.bits + this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ DROPBITS(last.bits);
+ }
+ DROPBITS(this.bits);
+ state->length = (unsigned)this.val;
+ if ((int)(this.op) == 0) {+ Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
+ "inflate: literal '%c'\n" :
+ "inflate: literal 0x%02x\n", this.val));
+ state->mode = LIT;
+ break;
+ }
+ if (this.op & 32) {+ Tracevv((stderr, "inflate: end of block\n"));
+ state->mode = TYPE;
+ break;
+ }
+ if (this.op & 64) {+ strm->msg = (char *)"invalid literal/length code";
+ state->mode = BAD;
+ break;
+ }
+ state->extra = (unsigned)(this.op) & 15;
+ state->mode = LENEXT;
+ case LENEXT:
+ if (state->extra) {+ NEEDBITS(state->extra);
+ state->length += BITS(state->extra);
+ DROPBITS(state->extra);
+ }
+ Tracevv((stderr, "inflate: length %u\n", state->length));
+ state->mode = DIST;
+ case DIST:
+ for (;;) {+ this = state->distcode[BITS(state->distbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if ((this.op & 0xf0) == 0) {+ last = this;
+ for (;;) {+ this = state->distcode[last.val +
+ (BITS(last.bits + last.op) >> last.bits)];
+ if ((unsigned)(last.bits + this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ DROPBITS(last.bits);
+ }
+ DROPBITS(this.bits);
+ if (this.op & 64) {+ strm->msg = (char *)"invalid distance code";
+ state->mode = BAD;
+ break;
+ }
+ state->offset = (unsigned)this.val;
+ state->extra = (unsigned)(this.op) & 15;
+ state->mode = DISTEXT;
+ case DISTEXT:
+ if (state->extra) {+ NEEDBITS(state->extra);
+ state->offset += BITS(state->extra);
+ DROPBITS(state->extra);
+ }
+ if (state->offset > state->whave + out - left) {+ strm->msg = (char *)"invalid distance too far back";
+ state->mode = BAD;
+ break;
+ }
+ Tracevv((stderr, "inflate: distance %u\n", state->offset));
+ state->mode = MATCH;
+ case MATCH:
+ if (left == 0) goto inf_leave;
+ copy = out - left;
+ if (state->offset > copy) { /* copy from window */+ copy = state->offset - copy;
+ if (copy > state->write) {+ copy -= state->write;
+ from = state->window + (state->wsize - copy);
+ }
+ else
+ from = state->window + (state->write - copy);
+ if (copy > state->length) copy = state->length;
+ }
+ else { /* copy from output */+ from = put - state->offset;
+ copy = state->length;
+ }
+ if (copy > left) copy = left;
+ left -= copy;
+ state->length -= copy;
+ do {+ *put++ = *from++;
+ } while (--copy);
+ if (state->length == 0) state->mode = LEN;
+ break;
+ case LIT:
+ if (left == 0) goto inf_leave;
+ *put++ = (unsigned char)(state->length);
+ left--;
+ state->mode = LEN;
+ break;
+ case CHECK:
+ if (state->wrap) {+ NEEDBITS(32);
+ out -= left;
+ strm->total_out += out;
+ state->total += out;
+ if (out)
+ strm->adler = state->check =
+ UPDATE(state->check, put - out, out);
+ out = left;
+ if ((
+#ifdef GUNZIP
+ state->flags ? hold :
+#endif
+ REVERSE(hold)) != state->check) {+ strm->msg = (char *)"incorrect data check";
+ state->mode = BAD;
+ break;
+ }
+ INITBITS();
+ Tracev((stderr, "inflate: check matches trailer\n"));
+ }
+#ifdef GUNZIP
+ state->mode = LENGTH;
+ case LENGTH:
+ if (state->wrap && state->flags) {+ NEEDBITS(32);
+ if (hold != (state->total & 0xffffffffUL)) {+ strm->msg = (char *)"incorrect length check";
+ state->mode = BAD;
+ break;
+ }
+ INITBITS();
+ Tracev((stderr, "inflate: length matches trailer\n"));
+ }
+#endif
+ state->mode = DONE;
+ case DONE:
+ ret = Z_STREAM_END;
+ goto inf_leave;
+ case BAD:
+ ret = Z_DATA_ERROR;
+ goto inf_leave;
+ case MEM:
+ return Z_MEM_ERROR;
+ case SYNC:
+ default:
+ return Z_STREAM_ERROR;
+ }
+
+ /*
+ Return from inflate(), updating the total counts and the check value.
+ If there was no progress during the inflate() call, return a buffer
+ error. Call updatewindow() to create and/or update the window state.
+ Note: a memory error from inflate() is non-recoverable.
+ */
+ inf_leave:
+ RESTORE();
+ if (state->wsize || (state->mode < CHECK && out != strm->avail_out))
+ if (updatewindow(strm, out)) {+ state->mode = MEM;
+ return Z_MEM_ERROR;
+ }
+ in -= strm->avail_in;
+ out -= strm->avail_out;
+ strm->total_in += in;
+ strm->total_out += out;
+ state->total += out;
+ if (state->wrap && out)
+ strm->adler = state->check =
+ UPDATE(state->check, strm->next_out - out, out);
+ strm->data_type = state->bits + (state->last ? 64 : 0) +
+ (state->mode == TYPE ? 128 : 0);
+ if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
+ ret = Z_BUF_ERROR;
+ return ret;
+}
+
+int ZEXPORT inflateEnd(strm)
+z_streamp strm;
+{+ struct inflate_state FAR *state;
+ if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
+ return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ if (state->window != Z_NULL) ZFREE(strm, state->window);
+ ZFREE(strm, strm->state);
+ strm->state = Z_NULL;
+ Tracev((stderr, "inflate: end\n"));
+ return Z_OK;
+}
+
+int ZEXPORT inflateSetDictionary(strm, dictionary, dictLength)
+z_streamp strm;
+const Bytef *dictionary;
+uInt dictLength;
+{+ struct inflate_state FAR *state;
+ unsigned long id;
+
+ /* check state */
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ if (state->mode != DICT) return Z_STREAM_ERROR;
+
+ /* check for correct dictionary id */
+ id = adler32(0L, Z_NULL, 0);
+ id = adler32(id, dictionary, dictLength);
+ if (id != state->check) return Z_DATA_ERROR;
+
+ /* copy dictionary to window */
+ if (updatewindow(strm, strm->avail_out)) {+ state->mode = MEM;
+ return Z_MEM_ERROR;
+ }
+ if (dictLength > state->wsize) {+ zmemcpy(state->window, dictionary + dictLength - state->wsize,
+ state->wsize);
+ state->whave = state->wsize;
+ }
+ else {+ zmemcpy(state->window + state->wsize - dictLength, dictionary,
+ dictLength);
+ state->whave = dictLength;
+ }
+ state->havedict = 1;
+ Tracev((stderr, "inflate: dictionary set\n"));
+ return Z_OK;
+}
+
+/*
+ Search buf[0..len-1] for the pattern: 0, 0, 0xff, 0xff. Return when found
+ or when out of input. When called, *have is the number of pattern bytes
+ found in order so far, in 0..3. On return *have is updated to the new
+ state. If on return *have equals four, then the pattern was found and the
+ return value is how many bytes were read including the last byte of the
+ pattern. If *have is less than four, then the pattern has not been found
+ yet and the return value is len. In the latter case, syncsearch() can be
+ called again with more data and the *have state. *have is initialized to
+ zero for the first call.
+ */
+local unsigned syncsearch(have, buf, len)
+unsigned FAR *have;
+unsigned char FAR *buf;
+unsigned len;
+{+ unsigned got;
+ unsigned next;
+
+ got = *have;
+ next = 0;
+ while (next < len && got < 4) {+ if ((int)(buf[next]) == (got < 2 ? 0 : 0xff))
+ got++;
+ else if (buf[next])
+ got = 0;
+ else
+ got = 4 - got;
+ next++;
+ }
+ *have = got;
+ return next;
+}
+
+int ZEXPORT inflateSync(strm)
+z_streamp strm;
+{+ unsigned len; /* number of bytes to look at or looked at */
+ unsigned long in, out; /* temporary to save total_in and total_out */
+ unsigned char buf[4]; /* to restore bit buffer to byte string */
+ struct inflate_state FAR *state;
+
+ /* check parameters */
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ if (strm->avail_in == 0 && state->bits < 8) return Z_BUF_ERROR;
+
+ /* if first time, start search in bit buffer */
+ if (state->mode != SYNC) {+ state->mode = SYNC;
+ state->hold <<= state->bits & 7;
+ state->bits -= state->bits & 7;
+ len = 0;
+ while (state->bits >= 8) {+ buf[len++] = (unsigned char)(state->hold);
+ state->hold >>= 8;
+ state->bits -= 8;
+ }
+ state->have = 0;
+ syncsearch(&(state->have), buf, len);
+ }
+
+ /* search available input */
+ len = syncsearch(&(state->have), strm->next_in, strm->avail_in);
+ strm->avail_in -= len;
+ strm->next_in += len;
+ strm->total_in += len;
+
+ /* return no joy or set up to restart inflate() on a new block */
+ if (state->have != 4) return Z_DATA_ERROR;
+ in = strm->total_in; out = strm->total_out;
+ inflateReset(strm);
+ strm->total_in = in; strm->total_out = out;
+ state->mode = TYPE;
+ return Z_OK;
+}
+
+/*
+ Returns true if inflate is currently at the end of a block generated by
+ Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
+ implementation to provide an additional safety check. PPP uses
+ Z_SYNC_FLUSH but removes the length bytes of the resulting empty stored
+ block. When decompressing, PPP checks that at the end of input packet,
+ inflate is waiting for these length bytes.
+ */
+int ZEXPORT inflateSyncPoint(strm)
+z_streamp strm;
+{+ struct inflate_state FAR *state;
+
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ return state->mode == STORED && state->bits == 0;
+}
+
+int ZEXPORT inflateCopy(dest, source)
+z_streamp dest;
+z_streamp source;
+{+ struct inflate_state FAR *state;
+ struct inflate_state FAR *copy;
+ unsigned char FAR *window;
+
+ /* check input */
+ if (dest == Z_NULL || source == Z_NULL || source->state == Z_NULL ||
+ source->zalloc == (alloc_func)0 || source->zfree == (free_func)0)
+ return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)source->state;
+
+ /* allocate space */
+ copy = (struct inflate_state FAR *)
+ ZALLOC(source, 1, sizeof(struct inflate_state));
+ if (copy == Z_NULL) return Z_MEM_ERROR;
+ window = Z_NULL;
+ if (state->window != Z_NULL) {+ window = (unsigned char FAR *)
+ ZALLOC(source, 1U << state->wbits, sizeof(unsigned char));
+ if (window == Z_NULL) {+ ZFREE(source, copy);
+ return Z_MEM_ERROR;
+ }
+ }
+
+ /* copy state */
+ *dest = *source;
+ *copy = *state;
+ copy->lencode = copy->codes + (state->lencode - state->codes);
+ copy->distcode = copy->codes + (state->distcode - state->codes);
+ copy->next = copy->codes + (state->next - state->codes);
+ if (window != Z_NULL)
+ zmemcpy(window, state->window, 1U << state->wbits);
+ copy->window = window;
+ dest->state = (voidpf)copy;
+ return Z_OK;
+}
--- /dev/null
+++ b/src/gfx/zlib/inflate.h
@@ -1,0 +1,117 @@
+/* inflate.h -- internal inflate state definition
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+ part of the implementation of the compression library and is
+ subject to change. Applications should only use zlib.h.
+ */
+
+/* define NO_GZIP when compiling if you want to disable gzip header and
+ trailer decoding by inflate(). NO_GZIP would be used to avoid linking in
+ the crc code when it is not needed. For shared libraries, gzip decoding
+ should be left enabled. */
+#ifndef NO_GZIP
+# define GUNZIP
+#endif
+
+/* Possible inflate modes between inflate() calls */
+typedef enum {+ HEAD, /* i: waiting for magic header */
+#ifdef GUNZIP
+ FLAGS, /* i: waiting for method and flags (gzip) */
+ TIME, /* i: waiting for modification time (gzip) */
+ OS, /* i: waiting for extra flags and operating system (gzip) */
+ EXLEN, /* i: waiting for extra length (gzip) */
+ EXTRA, /* i: waiting for extra bytes (gzip) */
+ NAME, /* i: waiting for end of file name (gzip) */
+ COMMENT, /* i: waiting for end of comment (gzip) */
+ HCRC, /* i: waiting for header crc (gzip) */
+#endif
+ DICTID, /* i: waiting for dictionary check value */
+ DICT, /* waiting for inflateSetDictionary() call */
+ TYPE, /* i: waiting for type bits, including last-flag bit */
+ TYPEDO, /* i: same, but skip check to exit inflate on new block */
+ STORED, /* i: waiting for stored size (length and complement) */
+ COPY, /* i/o: waiting for input or output to copy stored block */
+ TABLE, /* i: waiting for dynamic block table lengths */
+ LENLENS, /* i: waiting for code length code lengths */
+ CODELENS, /* i: waiting for length/lit and distance code lengths */
+ LEN, /* i: waiting for length/lit code */
+ LENEXT, /* i: waiting for length extra bits */
+ DIST, /* i: waiting for distance code */
+ DISTEXT, /* i: waiting for distance extra bits */
+ MATCH, /* o: waiting for output space to copy string */
+ LIT, /* o: waiting for output space to write literal */
+ CHECK, /* i: waiting for 32-bit check value */
+#ifdef GUNZIP
+ LENGTH, /* i: waiting for 32-bit length (gzip) */
+#endif
+ DONE, /* finished check, done -- remain here until reset */
+ BAD, /* got a data error -- remain here until reset */
+ MEM, /* got an inflate() memory error -- remain here until reset */
+ SYNC /* looking for synchronization bytes to restart inflate() */
+} inflate_mode;
+
+/*
+ State transitions between above modes -
+
+ (most modes can go to the BAD or MEM mode -- not shown for clarity)
+
+ Process header:
+ HEAD -> (gzip) or (zlib)
+ (gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME
+ NAME -> COMMENT -> HCRC -> TYPE
+ (zlib) -> DICTID or TYPE
+ DICTID -> DICT -> TYPE
+ Read deflate blocks:
+ TYPE -> STORED or TABLE or LEN or CHECK
+ STORED -> COPY -> TYPE
+ TABLE -> LENLENS -> CODELENS -> LEN
+ Read deflate codes:
+ LEN -> LENEXT or LIT or TYPE
+ LENEXT -> DIST -> DISTEXT -> MATCH -> LEN
+ LIT -> LEN
+ Process trailer:
+ CHECK -> LENGTH -> DONE
+ */
+
+/* state maintained between inflate() calls. Approximately 7K bytes. */
+struct inflate_state {+ inflate_mode mode; /* current inflate mode */
+ int last; /* true if processing last block */
+ int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
+ int havedict; /* true if dictionary provided */
+ int flags; /* gzip header method and flags (0 if zlib) */
+ unsigned long check; /* protected copy of check value */
+ unsigned long total; /* protected copy of output count */
+ /* sliding window */
+ unsigned wbits; /* log base 2 of requested window size */
+ unsigned wsize; /* window size or zero if not using window */
+ unsigned whave; /* valid bytes in the window */
+ unsigned write; /* window write index */
+ unsigned char FAR *window; /* allocated sliding window, if needed */
+ /* bit accumulator */
+ unsigned long hold; /* input bit accumulator */
+ unsigned bits; /* number of bits in "in" */
+ /* for string and stored block copying */
+ unsigned length; /* literal or length of data to copy */
+ unsigned offset; /* distance back to copy string from */
+ /* for table and code decoding */
+ unsigned extra; /* extra bits needed */
+ /* fixed and dynamic code tables */
+ code const FAR *lencode; /* starting table for length/literal codes */
+ code const FAR *distcode; /* starting table for distance codes */
+ unsigned lenbits; /* index bits for lencode */
+ unsigned distbits; /* index bits for distcode */
+ /* dynamic table building */
+ unsigned ncode; /* number of code length code lengths */
+ unsigned nlen; /* number of length code lengths */
+ unsigned ndist; /* number of distance code lengths */
+ unsigned have; /* number of code lengths in lens[] */
+ code FAR *next; /* next available space in codes[] */
+ unsigned short lens[320]; /* temporary storage for code lengths */
+ unsigned short work[288]; /* work area for code table building */
+ code codes[ENOUGH]; /* space for code tables */
+};
--- /dev/null
+++ b/src/gfx/zlib/inftrees.c
@@ -1,0 +1,328 @@
+/* inftrees.c -- generate Huffman trees for efficient decoding
+ * Copyright (C) 1995-2004 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+
+#define MAXBITS 15
+
+const char inflate_copyright[] =
+ " inflate 1.2.2 Copyright 1995-2004 Mark Adler ";
+/*
+ If you use the zlib library in a product, an acknowledgment is welcome
+ in the documentation of your product. If for some reason you cannot
+ include such an acknowledgment, I would appreciate that you keep this
+ copyright string in the executable of your product.
+ */
+
+/*
+ Build a set of tables to decode the provided canonical Huffman code.
+ The code lengths are lens[0..codes-1]. The result starts at *table,
+ whose indices are 0..2^bits-1. work is a writable array of at least
+ lens shorts, which is used as a work area. type is the type of code
+ to be generated, CODES, LENS, or DISTS. On return, zero is success,
+ -1 is an invalid code, and +1 means that ENOUGH isn't enough. table
+ on return points to the next available entry's address. bits is the
+ requested root table index bits, and on return it is the actual root
+ table index bits. It will differ if the request is greater than the
+ longest code or if it is less than the shortest code.
+ */
+int inflate_table(type, lens, codes, table, bits, work)
+codetype type;
+unsigned short FAR *lens;
+unsigned codes;
+code FAR * FAR *table;
+unsigned FAR *bits;
+unsigned short FAR *work;
+{+ unsigned len; /* a code's length in bits */
+ unsigned sym; /* index of code symbols */
+ unsigned min, max; /* minimum and maximum code lengths */
+ unsigned root; /* number of index bits for root table */
+ unsigned curr; /* number of index bits for current table */
+ unsigned drop; /* code bits to drop for sub-table */
+ int left; /* number of prefix codes available */
+ unsigned used; /* code entries in table used */
+ unsigned huff; /* Huffman code */
+ unsigned incr; /* for incrementing code, index */
+ unsigned fill; /* index for replicating entries */
+ unsigned low; /* low bits for current root entry */
+ unsigned mask; /* mask for low root bits */
+ code this; /* table entry for duplication */
+ code FAR *next; /* next available space in table */
+ const unsigned short FAR *base; /* base value table to use */
+ const unsigned short FAR *extra; /* extra bits table to use */
+ int end; /* use base and extra for symbol > end */
+ unsigned short count[MAXBITS+1]; /* number of codes of each length */
+ unsigned short offs[MAXBITS+1]; /* offsets in table for each length */
+ static const unsigned short lbase[31] = { /* Length codes 257..285 base */+ 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
+ 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
+ static const unsigned short lext[31] = { /* Length codes 257..285 extra */+ 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
+ 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 199, 198};
+ static const unsigned short dbase[32] = { /* Distance codes 0..29 base */+ 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
+ 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
+ 8193, 12289, 16385, 24577, 0, 0};
+ static const unsigned short dext[32] = { /* Distance codes 0..29 extra */+ 16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,
+ 23, 23, 24, 24, 25, 25, 26, 26, 27, 27,
+ 28, 28, 29, 29, 64, 64};
+
+ /*
+ Process a set of code lengths to create a canonical Huffman code. The
+ code lengths are lens[0..codes-1]. Each length corresponds to the
+ symbols 0..codes-1. The Huffman code is generated by first sorting the
+ symbols by length from short to long, and retaining the symbol order
+ for codes with equal lengths. Then the code starts with all zero bits
+ for the first code of the shortest length, and the codes are integer
+ increments for the same length, and zeros are appended as the length
+ increases. For the deflate format, these bits are stored backwards
+ from their more natural integer increment ordering, and so when the
+ decoding tables are built in the large loop below, the integer codes
+ are incremented backwards.
+
+ This routine assumes, but does not check, that all of the entries in
+ lens[] are in the range 0..MAXBITS. The caller must assure this.
+ 1..MAXBITS is interpreted as that code length. zero means that that
+ symbol does not occur in this code.
+
+ The codes are sorted by computing a count of codes for each length,
+ creating from that a table of starting indices for each length in the
+ sorted table, and then entering the symbols in order in the sorted
+ table. The sorted table is work[], with that space being provided by
+ the caller.
+
+ The length counts are used for other purposes as well, i.e. finding
+ the minimum and maximum length codes, determining if there are any
+ codes at all, checking for a valid set of lengths, and looking ahead
+ at length counts to determine sub-table sizes when building the
+ decoding tables.
+ */
+
+ /* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */
+ for (len = 0; len <= MAXBITS; len++)
+ count[len] = 0;
+ for (sym = 0; sym < codes; sym++)
+ count[lens[sym]]++;
+
+ /* bound code lengths, force root to be within code lengths */
+ root = *bits;
+ for (max = MAXBITS; max >= 1; max--)
+ if (count[max] != 0) break;
+ if (root > max) root = max;
+ if (max == 0) { /* no symbols to code at all */+ this.op = (unsigned char)64; /* invalid code marker */
+ this.bits = (unsigned char)1;
+ this.val = (unsigned short)0;
+ *(*table)++ = this; /* make a table to force an error */
+ *(*table)++ = this;
+ *bits = 1;
+ return 0; /* no symbols, but wait for decoding to report error */
+ }
+ for (min = 1; min <= MAXBITS; min++)
+ if (count[min] != 0) break;
+ if (root < min) root = min;
+
+ /* check for an over-subscribed or incomplete set of lengths */
+ left = 1;
+ for (len = 1; len <= MAXBITS; len++) {+ left <<= 1;
+ left -= count[len];
+ if (left < 0) return -1; /* over-subscribed */
+ }
+ if (left > 0 && (type == CODES || (codes - count[0] != 1)))
+ return -1; /* incomplete set */
+
+ /* generate offsets into symbol table for each length for sorting */
+ offs[1] = 0;
+ for (len = 1; len < MAXBITS; len++)
+ offs[len + 1] = offs[len] + count[len];
+
+ /* sort symbols by length, by symbol order within each length */
+ for (sym = 0; sym < codes; sym++)
+ if (lens[sym] != 0) work[offs[lens[sym]]++] = (unsigned short)sym;
+
+ /*
+ Create and fill in decoding tables. In this loop, the table being
+ filled is at next and has curr index bits. The code being used is huff
+ with length len. That code is converted to an index by dropping drop
+ bits off of the bottom. For codes where len is less than drop + curr,
+ those top drop + curr - len bits are incremented through all values to
+ fill the table with replicated entries.
+
+ root is the number of index bits for the root table. When len exceeds
+ root, sub-tables are created pointed to by the root entry with an index
+ of the low root bits of huff. This is saved in low to check for when a
+ new sub-table should be started. drop is zero when the root table is
+ being filled, and drop is root when sub-tables are being filled.
+
+ When a new sub-table is needed, it is necessary to look ahead in the
+ code lengths to determine what size sub-table is needed. The length
+ counts are used for this, and so count[] is decremented as codes are
+ entered in the tables.
+
+ used keeps track of how many table entries have been allocated from the
+ provided *table space. It is checked when a LENS table is being made
+ against the space in *table, ENOUGH, minus the maximum space needed by
+ the worst case distance code, MAXD. This should never happen, but the
+ sufficiency of ENOUGH has not been proven exhaustively, hence the check.
+ This assumes that when type == LENS, bits == 9.
+
+ sym increments through all symbols, and the loop terminates when
+ all codes of length max, i.e. all codes, have been processed. This
+ routine permits incomplete codes, so another loop after this one fills
+ in the rest of the decoding tables with invalid code markers.
+ */
+
+ /* set up for code type */
+ switch (type) {+ case CODES:
+ base = extra = work; /* dummy value--not used */
+ end = 19;
+ break;
+ case LENS:
+ base = lbase;
+ base -= 257;
+ extra = lext;
+ extra -= 257;
+ end = 256;
+ break;
+ default: /* DISTS */
+ base = dbase;
+ extra = dext;
+ end = -1;
+ }
+
+ /* initialize state for loop */
+ huff = 0; /* starting code */
+ sym = 0; /* starting code symbol */
+ len = min; /* starting code length */
+ next = *table; /* current table to fill in */
+ curr = root; /* current table index bits */
+ drop = 0; /* current bits to drop from code for index */
+ low = (unsigned)(-1); /* trigger new sub-table when len > root */
+ used = 1U << root; /* use root table entries */
+ mask = used - 1; /* mask for comparing low */
+
+ /* check available table space */
+ if (type == LENS && used >= ENOUGH - MAXD)
+ return 1;
+
+ /* process all codes and make table entries */
+ for (;;) {+ /* create table entry */
+ this.bits = (unsigned char)(len - drop);
+ if ((int)(work[sym]) < end) {+ this.op = (unsigned char)0;
+ this.val = work[sym];
+ }
+ else if ((int)(work[sym]) > end) {+ this.op = (unsigned char)(extra[work[sym]]);
+ this.val = base[work[sym]];
+ }
+ else {+ this.op = (unsigned char)(32 + 64); /* end of block */
+ this.val = 0;
+ }
+
+ /* replicate for those indices with low len bits equal to huff */
+ incr = 1U << (len - drop);
+ fill = 1U << curr;
+ do {+ fill -= incr;
+ next[(huff >> drop) + fill] = this;
+ } while (fill != 0);
+
+ /* backwards increment the len-bit code huff */
+ incr = 1U << (len - 1);
+ while (huff & incr)
+ incr >>= 1;
+ if (incr != 0) {+ huff &= incr - 1;
+ huff += incr;
+ }
+ else
+ huff = 0;
+
+ /* go to next symbol, update count, len */
+ sym++;
+ if (--(count[len]) == 0) {+ if (len == max) break;
+ len = lens[work[sym]];
+ }
+
+ /* create new sub-table if needed */
+ if (len > root && (huff & mask) != low) {+ /* if first time, transition to sub-tables */
+ if (drop == 0)
+ drop = root;
+
+ /* increment past last table */
+ next += 1U << curr;
+
+ /* determine length of next table */
+ curr = len - drop;
+ left = (int)(1 << curr);
+ while (curr + drop < max) {+ left -= count[curr + drop];
+ if (left <= 0) break;
+ curr++;
+ left <<= 1;
+ }
+
+ /* check for enough space */
+ used += 1U << curr;
+ if (type == LENS && used >= ENOUGH - MAXD)
+ return 1;
+
+ /* point entry in root table to sub-table */
+ low = huff & mask;
+ (*table)[low].op = (unsigned char)curr;
+ (*table)[low].bits = (unsigned char)root;
+ (*table)[low].val = (unsigned short)(next - *table);
+ }
+ }
+
+ /*
+ Fill in rest of table for incomplete codes. This loop is similar to the
+ loop above in incrementing huff for table indices. It is assumed that
+ len is equal to curr + drop, so there is no loop needed to increment
+ through high index bits. When the current sub-table is filled, the loop
+ drops back to the root table to fill in any remaining entries there.
+ */
+ this.op = (unsigned char)64; /* invalid code marker */
+ this.bits = (unsigned char)(len - drop);
+ this.val = (unsigned short)0;
+ while (huff != 0) {+ /* when done with sub-table, drop back to root table */
+ if (drop != 0 && (huff & mask) != low) {+ drop = 0;
+ len = root;
+ next = *table;
+ this.bits = (unsigned char)len;
+ }
+
+ /* put invalid code marker in table */
+ next[huff >> drop] = this;
+
+ /* backwards increment the len-bit code huff */
+ incr = 1U << (len - 1);
+ while (huff & incr)
+ incr >>= 1;
+ if (incr != 0) {+ huff &= incr - 1;
+ huff += incr;
+ }
+ else
+ huff = 0;
+ }
+
+ /* set return parameters */
+ *table += used;
+ *bits = root;
+ return 0;
+}
--- /dev/null
+++ b/src/gfx/zlib/inftrees.h
@@ -1,0 +1,55 @@
+/* inftrees.h -- header to use inftrees.c
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+ part of the implementation of the compression library and is
+ subject to change. Applications should only use zlib.h.
+ */
+
+/* Structure for decoding tables. Each entry provides either the
+ information needed to do the operation requested by the code that
+ indexed that table entry, or it provides a pointer to another
+ table that indexes more bits of the code. op indicates whether
+ the entry is a pointer to another table, a literal, a length or
+ distance, an end-of-block, or an invalid code. For a table
+ pointer, the low four bits of op is the number of index bits of
+ that table. For a length or distance, the low four bits of op
+ is the number of extra bits to get after the code. bits is
+ the number of bits in this code or part of the code to drop off
+ of the bit buffer. val is the actual byte to output in the case
+ of a literal, the base length or distance, or the offset from
+ the current table to the next table. Each entry is four bytes. */
+typedef struct {+ unsigned char op; /* operation, extra bits, table bits */
+ unsigned char bits; /* bits in this part of the code */
+ unsigned short val; /* offset in table or code value */
+} code;
+
+/* op values as set by inflate_table():
+ 00000000 - literal
+ 0000tttt - table link, tttt != 0 is the number of table index bits
+ 0001eeee - length or distance, eeee is the number of extra bits
+ 01100000 - end of block
+ 01000000 - invalid code
+ */
+
+/* Maximum size of dynamic tree. The maximum found in a long but non-
+ exhaustive search was 1004 code structures (850 for length/literals
+ and 154 for distances, the latter actually the result of an
+ exhaustive search). The true maximum is not known, but the value
+ below is more than safe. */
+#define ENOUGH 1440
+#define MAXD 154
+
+/* Type of code to build for inftable() */
+typedef enum {+ CODES,
+ LENS,
+ DISTS
+} codetype;
+
+extern int inflate_table OF((codetype type, unsigned short FAR *lens,
+ unsigned codes, code FAR * FAR *table,
+ unsigned FAR *bits, unsigned short FAR *work));
--- /dev/null
+++ b/src/gfx/zlib/minigzip.c
@@ -1,0 +1,322 @@
+/* minigzip.c -- simulate gzip using the zlib compression library
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/*
+ * minigzip is a minimal implementation of the gzip utility. This is
+ * only an example of using zlib and isn't meant to replace the
+ * full-featured gzip. No attempt is made to deal with file systems
+ * limiting names to 14 or 8+3 characters, etc... Error checking is
+ * very limited. So use minigzip only for testing; use gzip for the
+ * real thing. On MSDOS, use only on file names without extension
+ * or in pipe mode.
+ */
+
+/* @(#) $Id: minigzip.c,v 1.1.1.1 2005/04/24 21:39:42 giles Exp $ */
+
+#include <stdio.h>
+#include "zlib.h"
+
+#ifdef STDC
+# include <string.h>
+# include <stdlib.h>
+#else
+ extern void exit OF((int));
+#endif
+
+#ifdef USE_MMAP
+# include <sys/types.h>
+# include <sys/mman.h>
+# include <sys/stat.h>
+#endif
+
+#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
+# include <fcntl.h>
+# include <io.h>
+# define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
+#else
+# define SET_BINARY_MODE(file)
+#endif
+
+#ifdef VMS
+# define unlink delete
+# define GZ_SUFFIX "-gz"
+#endif
+#ifdef RISCOS
+# define unlink remove
+# define GZ_SUFFIX "-gz"
+# define fileno(file) file->__file
+#endif
+#if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
+# include <unix.h> /* for fileno */
+#endif
+
+#ifndef WIN32 /* unlink already in stdio.h for WIN32 */
+ extern int unlink OF((const char *));
+#endif
+
+#ifndef GZ_SUFFIX
+# define GZ_SUFFIX ".gz"
+#endif
+#define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1)
+
+#define BUFLEN 16384
+#define MAX_NAME_LEN 1024
+
+#ifdef MAXSEG_64K
+# define local static
+ /* Needed for systems with limitation on stack size. */
+#else
+# define local
+#endif
+
+char *prog;
+
+void error OF((const char *msg));
+void gz_compress OF((FILE *in, gzFile out));
+#ifdef USE_MMAP
+int gz_compress_mmap OF((FILE *in, gzFile out));
+#endif
+void gz_uncompress OF((gzFile in, FILE *out));
+void file_compress OF((char *file, char *mode));
+void file_uncompress OF((char *file));
+int main OF((int argc, char *argv[]));
+
+/* ===========================================================================
+ * Display error message and exit
+ */
+void error(msg)
+ const char *msg;
+{+ fprintf(stderr, "%s: %s\n", prog, msg);
+ exit(1);
+}
+
+/* ===========================================================================
+ * Compress input to output then close both files.
+ */
+
+void gz_compress(in, out)
+ FILE *in;
+ gzFile out;
+{+ local char buf[BUFLEN];
+ int len;
+ int err;
+
+#ifdef USE_MMAP
+ /* Try first compressing with mmap. If mmap fails (minigzip used in a
+ * pipe), use the normal fread loop.
+ */
+ if (gz_compress_mmap(in, out) == Z_OK) return;
+#endif
+ for (;;) {+ len = (int)fread(buf, 1, sizeof(buf), in);
+ if (ferror(in)) {+ perror("fread");+ exit(1);
+ }
+ if (len == 0) break;
+
+ if (gzwrite(out, buf, (unsigned)len) != len) error(gzerror(out, &err));
+ }
+ fclose(in);
+ if (gzclose(out) != Z_OK) error("failed gzclose");+}
+
+#ifdef USE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */
+
+/* Try compressing the input file at once using mmap. Return Z_OK if
+ * if success, Z_ERRNO otherwise.
+ */
+int gz_compress_mmap(in, out)
+ FILE *in;
+ gzFile out;
+{+ int len;
+ int err;
+ int ifd = fileno(in);
+ caddr_t buf; /* mmap'ed buffer for the entire input file */
+ off_t buf_len; /* length of the input file */
+ struct stat sb;
+
+ /* Determine the size of the file, needed for mmap: */
+ if (fstat(ifd, &sb) < 0) return Z_ERRNO;
+ buf_len = sb.st_size;
+ if (buf_len <= 0) return Z_ERRNO;
+
+ /* Now do the actual mmap: */
+ buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0);
+ if (buf == (caddr_t)(-1)) return Z_ERRNO;
+
+ /* Compress the whole file at once: */
+ len = gzwrite(out, (char *)buf, (unsigned)buf_len);
+
+ if (len != (int)buf_len) error(gzerror(out, &err));
+
+ munmap(buf, buf_len);
+ fclose(in);
+ if (gzclose(out) != Z_OK) error("failed gzclose");+ return Z_OK;
+}
+#endif /* USE_MMAP */
+
+/* ===========================================================================
+ * Uncompress input to output then close both files.
+ */
+void gz_uncompress(in, out)
+ gzFile in;
+ FILE *out;
+{+ local char buf[BUFLEN];
+ int len;
+ int err;
+
+ for (;;) {+ len = gzread(in, buf, sizeof(buf));
+ if (len < 0) error (gzerror(in, &err));
+ if (len == 0) break;
+
+ if ((int)fwrite(buf, 1, (unsigned)len, out) != len) {+ error("failed fwrite");+ }
+ }
+ if (fclose(out)) error("failed fclose");+
+ if (gzclose(in) != Z_OK) error("failed gzclose");+}
+
+
+/* ===========================================================================
+ * Compress the given file: create a corresponding .gz file and remove the
+ * original.
+ */
+void file_compress(file, mode)
+ char *file;
+ char *mode;
+{+ local char outfile[MAX_NAME_LEN];
+ FILE *in;
+ gzFile out;
+
+ strcpy(outfile, file);
+ strcat(outfile, GZ_SUFFIX);
+
+ in = fopen(file, "rb");
+ if (in == NULL) {+ perror(file);
+ exit(1);
+ }
+ out = gzopen(outfile, mode);
+ if (out == NULL) {+ fprintf(stderr, "%s: can't gzopen %s\n", prog, outfile);
+ exit(1);
+ }
+ gz_compress(in, out);
+
+ unlink(file);
+}
+
+
+/* ===========================================================================
+ * Uncompress the given file and remove the original.
+ */
+void file_uncompress(file)
+ char *file;
+{+ local char buf[MAX_NAME_LEN];
+ char *infile, *outfile;
+ FILE *out;
+ gzFile in;
+ uInt len = (uInt)strlen(file);
+
+ strcpy(buf, file);
+
+ if (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) {+ infile = file;
+ outfile = buf;
+ outfile[len-3] = '\0';
+ } else {+ outfile = file;
+ infile = buf;
+ strcat(infile, GZ_SUFFIX);
+ }
+ in = gzopen(infile, "rb");
+ if (in == NULL) {+ fprintf(stderr, "%s: can't gzopen %s\n", prog, infile);
+ exit(1);
+ }
+ out = fopen(outfile, "wb");
+ if (out == NULL) {+ perror(file);
+ exit(1);
+ }
+
+ gz_uncompress(in, out);
+
+ unlink(infile);
+}
+
+
+/* ===========================================================================
+ * Usage: minigzip [-d] [-f] [-h] [-r] [-1 to -9] [files...]
+ * -d : decompress
+ * -f : compress with Z_FILTERED
+ * -h : compress with Z_HUFFMAN_ONLY
+ * -r : compress with Z_RLE
+ * -1 to -9 : compression level
+ */
+
+int main(argc, argv)
+ int argc;
+ char *argv[];
+{+ int uncompr = 0;
+ gzFile file;
+ char outmode[20];
+
+ strcpy(outmode, "wb6 ");
+
+ prog = argv[0];
+ argc--, argv++;
+
+ while (argc > 0) {+ if (strcmp(*argv, "-d") == 0)
+ uncompr = 1;
+ else if (strcmp(*argv, "-f") == 0)
+ outmode[3] = 'f';
+ else if (strcmp(*argv, "-h") == 0)
+ outmode[3] = 'h';
+ else if (strcmp(*argv, "-r") == 0)
+ outmode[3] = 'R';
+ else if ((*argv)[0] == '-' && (*argv)[1] >= '1' && (*argv)[1] <= '9' &&
+ (*argv)[2] == 0)
+ outmode[2] = (*argv)[1];
+ else
+ break;
+ argc--, argv++;
+ }
+ if (argc == 0) {+ SET_BINARY_MODE(stdin);
+ SET_BINARY_MODE(stdout);
+ if (uncompr) {+ file = gzdopen(fileno(stdin), "rb");
+ if (file == NULL) error("can't gzdopen stdin");+ gz_uncompress(file, stdout);
+ } else {+ file = gzdopen(fileno(stdout), outmode);
+ if (file == NULL) error("can't gzdopen stdout");+ gz_compress(stdin, file);
+ }
+ } else {+ do {+ if (uncompr) {+ file_uncompress(*argv);
+ } else {+ file_compress(*argv, outmode);
+ }
+ } while (argv++, --argc);
+ }
+ return 0;
+}
--- /dev/null
+++ b/src/gfx/zlib/mkfile
@@ -1,0 +1,21 @@
+</$objtype/mkfile
+
+CFLAGS=$CFLAGS -p -I/sys/include/npe -D__plan9__ -D__${objtype}__ -DSTDC+LIB=libz.$O.a
+CLEANFILES=libz.$O.a
+
+OFILES=\
+ adler32.$O \
+ compress.$O \
+ crc32.$O \
+ deflate.$O \
+ gzio.$O \
+ infback.$O \
+ inffast.$O \
+ inflate.$O \
+ inftrees.$O \
+ trees.$O \
+ uncompr.$O \
+ zutil.$O \
+
+</sys/src/cmd/mksyslib
--- /dev/null
+++ b/src/gfx/zlib/trees.c
@@ -1,0 +1,1214 @@
+/* trees.c -- output deflated data using Huffman coding
+ * Copyright (C) 1995-2003 Jean-loup Gailly
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/*
+ * ALGORITHM
+ *
+ * The "deflation" process uses several Huffman trees. The more
+ * common source values are represented by shorter bit sequences.
+ *
+ * Each code tree is stored in a compressed form which is itself
+ * a Huffman encoding of the lengths of all the code strings (in
+ * ascending order by source values). The actual code strings are
+ * reconstructed from the lengths in the inflate process, as described
+ * in the deflate specification.
+ *
+ * REFERENCES
+ *
+ * Deutsch, L.P.,"'Deflate' Compressed Data Format Specification".
+ * Available in ftp.uu.net:/pub/archiving/zip/doc/deflate-1.1.doc
+ *
+ * Storer, James A.
+ * Data Compression: Methods and Theory, pp. 49-50.
+ * Computer Science Press, 1988. ISBN 0-7167-8156-5.
+ *
+ * Sedgewick, R.
+ * Algorithms, p290.
+ * Addison-Wesley, 1983. ISBN 0-201-06672-6.
+ */
+
+/* @(#) $Id: trees.c,v 1.1.1.1 2005/04/24 21:39:39 giles Exp $ */
+
+/* #define GEN_TREES_H */
+
+#include "deflate.h"
+
+#ifdef DEBUG
+# include <ctype.h>
+#endif
+
+/* ===========================================================================
+ * Constants
+ */
+
+#define MAX_BL_BITS 7
+/* Bit length codes must not exceed MAX_BL_BITS bits */
+
+#define END_BLOCK 256
+/* end of block literal code */
+
+#define REP_3_6 16
+/* repeat previous bit length 3-6 times (2 bits of repeat count) */
+
+#define REPZ_3_10 17
+/* repeat a zero length 3-10 times (3 bits of repeat count) */
+
+#define REPZ_11_138 18
+/* repeat a zero length 11-138 times (7 bits of repeat count) */
+
+local const int extra_lbits[LENGTH_CODES] /* extra bits for each length code */
+ = {0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0};+
+local const int extra_dbits[D_CODES] /* extra bits for each distance code */
+ = {0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};+
+local const int extra_blbits[BL_CODES]/* extra bits for each bit length code */
+ = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7};+
+local const uch bl_order[BL_CODES]
+ = {16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15};+/* The lengths of the bit length codes are sent in order of decreasing
+ * probability, to avoid transmitting the lengths for unused bit length codes.
+ */
+
+#define Buf_size (8 * 2*sizeof(char))
+/* Number of bits used within bi_buf. (bi_buf might be implemented on
+ * more than 16 bits on some systems.)
+ */
+
+/* ===========================================================================
+ * Local data. These are initialized only once.
+ */
+
+#define DIST_CODE_LEN 512 /* see definition of array dist_code below */
+
+#if defined(GEN_TREES_H) || !defined(STDC)
+/* non ANSI compilers may not accept trees.h */
+
+local ct_data static_ltree[L_CODES+2];
+/* The static literal tree. Since the bit lengths are imposed, there is no
+ * need for the L_CODES extra codes used during heap construction. However
+ * The codes 286 and 287 are needed to build a canonical tree (see _tr_init
+ * below).
+ */
+
+local ct_data static_dtree[D_CODES];
+/* The static distance tree. (Actually a trivial tree since all codes use
+ * 5 bits.)
+ */
+
+uch _dist_code[DIST_CODE_LEN];
+/* Distance codes. The first 256 values correspond to the distances
+ * 3 .. 258, the last 256 values correspond to the top 8 bits of
+ * the 15 bit distances.
+ */
+
+uch _length_code[MAX_MATCH-MIN_MATCH+1];
+/* length code for each normalized match length (0 == MIN_MATCH) */
+
+local int base_length[LENGTH_CODES];
+/* First normalized length for each code (0 = MIN_MATCH) */
+
+local int base_dist[D_CODES];
+/* First normalized distance for each code (0 = distance of 1) */
+
+#else
+# include "trees.h"
+#endif /* GEN_TREES_H */
+
+struct static_tree_desc_s {+ const ct_data *static_tree; /* static tree or NULL */
+ const intf *extra_bits; /* extra bits for each code or NULL */
+ int extra_base; /* base index for extra_bits */
+ int elems; /* max number of elements in the tree */
+ int max_length; /* max bit length for the codes */
+};
+
+local static_tree_desc static_l_desc =
+{static_ltree, extra_lbits, LITERALS+1, L_CODES, MAX_BITS};+
+local static_tree_desc static_d_desc =
+{static_dtree, extra_dbits, 0, D_CODES, MAX_BITS};+
+local static_tree_desc static_bl_desc =
+{(const ct_data *)0, extra_blbits, 0, BL_CODES, MAX_BL_BITS};+
+/* ===========================================================================
+ * Local (static) routines in this file.
+ */
+
+local void tr_static_init OF((void));
+local void init_block OF((deflate_state *s));
+local void pqdownheap OF((deflate_state *s, ct_data *tree, int k));
+local void gen_bitlen OF((deflate_state *s, tree_desc *desc));
+local void gen_codes OF((ct_data *tree, int max_code, ushf *bl_count));
+local void build_tree OF((deflate_state *s, tree_desc *desc));
+local void scan_tree OF((deflate_state *s, ct_data *tree, int max_code));
+local void send_tree OF((deflate_state *s, ct_data *tree, int max_code));
+local int build_bl_tree OF((deflate_state *s));
+local void send_all_trees OF((deflate_state *s, int lcodes, int dcodes,
+ int blcodes));
+local void compress_block OF((deflate_state *s, ct_data *ltree,
+ ct_data *dtree));
+local void set_data_type OF((deflate_state *s));
+local unsigned bi_reverse OF((unsigned value, int length));
+local void bi_windup OF((deflate_state *s));
+local void bi_flush OF((deflate_state *s));
+local void copy_block OF((deflate_state *s, charf *buf, unsigned len,
+ int header));
+
+#ifdef GEN_TREES_H
+local void gen_trees_header OF((void));
+#endif
+
+#ifndef DEBUG
+# define send_code(s, c, tree) send_bits(s, tree[c].Code, tree[c].Len)
+ /* Send a code of the given tree. c and tree must not have side effects */
+
+#else /* DEBUG */
+# define send_code(s, c, tree) \
+ { if (z_verbose>2) fprintf(stderr,"\ncd %3d ",(c)); \+ send_bits(s, tree[c].Code, tree[c].Len); }
+#endif
+
+/* ===========================================================================
+ * Output a short LSB first on the stream.
+ * IN assertion: there is enough room in pendingBuf.
+ */
+#define put_short(s, w) { \+ put_byte(s, (uch)((w) & 0xff)); \
+ put_byte(s, (uch)((ush)(w) >> 8)); \
+}
+
+/* ===========================================================================
+ * Send a value on a given number of bits.
+ * IN assertion: length <= 16 and value fits in length bits.
+ */
+#ifdef DEBUG
+local void send_bits OF((deflate_state *s, int value, int length));
+
+local void send_bits(s, value, length)
+ deflate_state *s;
+ int value; /* value to send */
+ int length; /* number of bits */
+{+ Tracevv((stderr," l %2d v %4x ", length, value));
+ Assert(length > 0 && length <= 15, "invalid length");
+ s->bits_sent += (ulg)length;
+
+ /* If not enough room in bi_buf, use (valid) bits from bi_buf and
+ * (16 - bi_valid) bits from value, leaving (width - (16-bi_valid))
+ * unused bits in value.
+ */
+ if (s->bi_valid > (int)Buf_size - length) {+ s->bi_buf |= (value << s->bi_valid);
+ put_short(s, s->bi_buf);
+ s->bi_buf = (ush)value >> (Buf_size - s->bi_valid);
+ s->bi_valid += length - Buf_size;
+ } else {+ s->bi_buf |= value << s->bi_valid;
+ s->bi_valid += length;
+ }
+}
+#else /* !DEBUG */
+
+#define send_bits(s, value, length) \
+{ int len = length;\+ if (s->bi_valid > (int)Buf_size - len) {\+ int val = value;\
+ s->bi_buf |= (val << s->bi_valid);\
+ put_short(s, s->bi_buf);\
+ s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\
+ s->bi_valid += len - Buf_size;\
+ } else {\+ s->bi_buf |= (value) << s->bi_valid;\
+ s->bi_valid += len;\
+ }\
+}
+#endif /* DEBUG */
+
+
+/* the arguments must not have side effects */
+
+/* ===========================================================================
+ * Initialize the various 'constant' tables.
+ */
+local void tr_static_init(void)
+{+#if defined(GEN_TREES_H) || !defined(STDC)
+ static int static_init_done = 0;
+ int n; /* iterates over tree elements */
+ int bits; /* bit counter */
+ int length; /* length value */
+ int code; /* code value */
+ int dist; /* distance index */
+ ush bl_count[MAX_BITS+1];
+ /* number of codes at each bit length for an optimal tree */
+
+ if (static_init_done) return;
+
+ /* For some embedded targets, global variables are not initialized: */
+ static_l_desc.static_tree = static_ltree;
+ static_l_desc.extra_bits = extra_lbits;
+ static_d_desc.static_tree = static_dtree;
+ static_d_desc.extra_bits = extra_dbits;
+ static_bl_desc.extra_bits = extra_blbits;
+
+ /* Initialize the mapping length (0..255) -> length code (0..28) */
+ length = 0;
+ for (code = 0; code < LENGTH_CODES-1; code++) {+ base_length[code] = length;
+ for (n = 0; n < (1<<extra_lbits[code]); n++) {+ _length_code[length++] = (uch)code;
+ }
+ }
+ Assert (length == 256, "tr_static_init: length != 256");
+ /* Note that the length 255 (match length 258) can be represented
+ * in two different ways: code 284 + 5 bits or code 285, so we
+ * overwrite length_code[255] to use the best encoding:
+ */
+ _length_code[length-1] = (uch)code;
+
+ /* Initialize the mapping dist (0..32K) -> dist code (0..29) */
+ dist = 0;
+ for (code = 0 ; code < 16; code++) {+ base_dist[code] = dist;
+ for (n = 0; n < (1<<extra_dbits[code]); n++) {+ _dist_code[dist++] = (uch)code;
+ }
+ }
+ Assert (dist == 256, "tr_static_init: dist != 256");
+ dist >>= 7; /* from now on, all distances are divided by 128 */
+ for ( ; code < D_CODES; code++) {+ base_dist[code] = dist << 7;
+ for (n = 0; n < (1<<(extra_dbits[code]-7)); n++) {+ _dist_code[256 + dist++] = (uch)code;
+ }
+ }
+ Assert (dist == 256, "tr_static_init: 256+dist != 512");
+
+ /* Construct the codes of the static literal tree */
+ for (bits = 0; bits <= MAX_BITS; bits++) bl_count[bits] = 0;
+ n = 0;
+ while (n <= 143) static_ltree[n++].Len = 8, bl_count[8]++;
+ while (n <= 255) static_ltree[n++].Len = 9, bl_count[9]++;
+ while (n <= 279) static_ltree[n++].Len = 7, bl_count[7]++;
+ while (n <= 287) static_ltree[n++].Len = 8, bl_count[8]++;
+ /* Codes 286 and 287 do not exist, but we must include them in the
+ * tree construction to get a canonical Huffman tree (longest code
+ * all ones)
+ */
+ gen_codes((ct_data *)static_ltree, L_CODES+1, bl_count);
+
+ /* The static distance tree is trivial: */
+ for (n = 0; n < D_CODES; n++) {+ static_dtree[n].Len = 5;
+ static_dtree[n].Code = bi_reverse((unsigned)n, 5);
+ }
+ static_init_done = 1;
+
+# ifdef GEN_TREES_H
+ gen_trees_header();
+# endif
+#endif /* defined(GEN_TREES_H) || !defined(STDC) */
+}
+
+/* ===========================================================================
+ * Genererate the file trees.h describing the static trees.
+ */
+#ifdef GEN_TREES_H
+# ifndef DEBUG
+# include <stdio.h>
+# endif
+
+# define SEPARATOR(i, last, width) \
+ ((i) == (last)? "\n};\n\n" : \
+ ((i) % (width) == (width)-1 ? ",\n" : ", "))
+
+void gen_trees_header(void)
+{+ FILE *header = fopen("trees.h", "w");+ int i;
+
+ Assert (header != NULL, "Can't open trees.h");
+ fprintf(header,
+ "/* header created automatically with -DGEN_TREES_H */\n\n");
+
+ fprintf(header, "local const ct_data static_ltree[L_CODES+2] = {\n");+ for (i = 0; i < L_CODES+2; i++) {+ fprintf(header, "{{%3u},{%3u}}%s", static_ltree[i].Code,+ static_ltree[i].Len, SEPARATOR(i, L_CODES+1, 5));
+ }
+
+ fprintf(header, "local const ct_data static_dtree[D_CODES] = {\n");+ for (i = 0; i < D_CODES; i++) {+ fprintf(header, "{{%2u},{%2u}}%s", static_dtree[i].Code,+ static_dtree[i].Len, SEPARATOR(i, D_CODES-1, 5));
+ }
+
+ fprintf(header, "const uch _dist_code[DIST_CODE_LEN] = {\n");+ for (i = 0; i < DIST_CODE_LEN; i++) {+ fprintf(header, "%2u%s", _dist_code[i],
+ SEPARATOR(i, DIST_CODE_LEN-1, 20));
+ }
+
+ fprintf(header, "const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {\n");+ for (i = 0; i < MAX_MATCH-MIN_MATCH+1; i++) {+ fprintf(header, "%2u%s", _length_code[i],
+ SEPARATOR(i, MAX_MATCH-MIN_MATCH, 20));
+ }
+
+ fprintf(header, "local const int base_length[LENGTH_CODES] = {\n");+ for (i = 0; i < LENGTH_CODES; i++) {+ fprintf(header, "%1u%s", base_length[i],
+ SEPARATOR(i, LENGTH_CODES-1, 20));
+ }
+
+ fprintf(header, "local const int base_dist[D_CODES] = {\n");+ for (i = 0; i < D_CODES; i++) {+ fprintf(header, "%5u%s", base_dist[i],
+ SEPARATOR(i, D_CODES-1, 10));
+ }
+
+ fclose(header);
+}
+#endif /* GEN_TREES_H */
+
+/* ===========================================================================
+ * Initialize the tree data structures for a new zlib stream.
+ */
+void _tr_init(deflate_state *s)
+{+ tr_static_init();
+
+ s->l_desc.dyn_tree = s->dyn_ltree;
+ s->l_desc.stat_desc = &static_l_desc;
+
+ s->d_desc.dyn_tree = s->dyn_dtree;
+ s->d_desc.stat_desc = &static_d_desc;
+
+ s->bl_desc.dyn_tree = s->bl_tree;
+ s->bl_desc.stat_desc = &static_bl_desc;
+
+ s->bi_buf = 0;
+ s->bi_valid = 0;
+ s->last_eob_len = 8; /* enough lookahead for inflate */
+#ifdef DEBUG
+ s->compressed_len = 0L;
+ s->bits_sent = 0L;
+#endif
+
+ /* Initialize the first block of the first file: */
+ init_block(s);
+}
+
+/* ===========================================================================
+ * Initialize a new block.
+ */
+local void init_block(s)
+ deflate_state *s;
+{+ int n; /* iterates over tree elements */
+
+ /* Initialize the trees. */
+ for (n = 0; n < L_CODES; n++) s->dyn_ltree[n].Freq = 0;
+ for (n = 0; n < D_CODES; n++) s->dyn_dtree[n].Freq = 0;
+ for (n = 0; n < BL_CODES; n++) s->bl_tree[n].Freq = 0;
+
+ s->dyn_ltree[END_BLOCK].Freq = 1;
+ s->opt_len = s->static_len = 0L;
+ s->last_lit = s->matches = 0;
+}
+
+#define SMALLEST 1
+/* Index within the heap array of least frequent node in the Huffman tree */
+
+
+/* ===========================================================================
+ * Remove the smallest element from the heap and recreate the heap with
+ * one less element. Updates heap and heap_len.
+ */
+#define pqremove(s, tree, top) \
+{\+ top = s->heap[SMALLEST]; \
+ s->heap[SMALLEST] = s->heap[s->heap_len--]; \
+ pqdownheap(s, tree, SMALLEST); \
+}
+
+/* ===========================================================================
+ * Compares to subtrees, using the tree depth as tie breaker when
+ * the subtrees have equal frequency. This minimizes the worst case length.
+ */
+#define smaller(tree, n, m, depth) \
+ (tree[n].Freq < tree[m].Freq || \
+ (tree[n].Freq == tree[m].Freq && depth[n] <= depth[m]))
+
+/* ===========================================================================
+ * Restore the heap property by moving down the tree starting at node k,
+ * exchanging a node with the smallest of its two sons if necessary, stopping
+ * when the heap property is re-established (each father smaller than its
+ * two sons).
+ */
+local void pqdownheap(s, tree, k)
+ deflate_state *s;
+ ct_data *tree; /* the tree to restore */
+ int k; /* node to move down */
+{+ int v = s->heap[k];
+ int j = k << 1; /* left son of k */
+ while (j <= s->heap_len) {+ /* Set j to the smallest of the two sons: */
+ if (j < s->heap_len &&
+ smaller(tree, s->heap[j+1], s->heap[j], s->depth)) {+ j++;
+ }
+ /* Exit if v is smaller than both sons */
+ if (smaller(tree, v, s->heap[j], s->depth)) break;
+
+ /* Exchange v with the smallest son */
+ s->heap[k] = s->heap[j]; k = j;
+
+ /* And continue down the tree, setting j to the left son of k */
+ j <<= 1;
+ }
+ s->heap[k] = v;
+}
+
+/* ===========================================================================
+ * Compute the optimal bit lengths for a tree and update the total bit length
+ * for the current block.
+ * IN assertion: the fields freq and dad are set, heap[heap_max] and
+ * above are the tree nodes sorted by increasing frequency.
+ * OUT assertions: the field len is set to the optimal bit length, the
+ * array bl_count contains the frequencies for each bit length.
+ * The length opt_len is updated; static_len is also updated if stree is
+ * not null.
+ */
+local void gen_bitlen(s, desc)
+ deflate_state *s;
+ tree_desc *desc; /* the tree descriptor */
+{+ ct_data *tree = desc->dyn_tree;
+ int max_code = desc->max_code;
+ const ct_data *stree = desc->stat_desc->static_tree;
+ const intf *extra = desc->stat_desc->extra_bits;
+ int base = desc->stat_desc->extra_base;
+ int max_length = desc->stat_desc->max_length;
+ int h; /* heap index */
+ int n, m; /* iterate over the tree elements */
+ int bits; /* bit length */
+ int xbits; /* extra bits */
+ ush f; /* frequency */
+ int overflow = 0; /* number of elements with bit length too large */
+
+ for (bits = 0; bits <= MAX_BITS; bits++) s->bl_count[bits] = 0;
+
+ /* In a first pass, compute the optimal bit lengths (which may
+ * overflow in the case of the bit length tree).
+ */
+ tree[s->heap[s->heap_max]].Len = 0; /* root of the heap */
+
+ for (h = s->heap_max+1; h < HEAP_SIZE; h++) {+ n = s->heap[h];
+ bits = tree[tree[n].Dad].Len + 1;
+ if (bits > max_length) bits = max_length, overflow++;
+ tree[n].Len = (ush)bits;
+ /* We overwrite tree[n].Dad which is no longer needed */
+
+ if (n > max_code) continue; /* not a leaf node */
+
+ s->bl_count[bits]++;
+ xbits = 0;
+ if (n >= base) xbits = extra[n-base];
+ f = tree[n].Freq;
+ s->opt_len += (ulg)f * (bits + xbits);
+ if (stree) s->static_len += (ulg)f * (stree[n].Len + xbits);
+ }
+ if (overflow == 0) return;
+
+ Trace((stderr,"\nbit length overflow\n"));
+ /* This happens for example on obj2 and pic of the Calgary corpus */
+
+ /* Find the first bit length which could increase: */
+ do {+ bits = max_length-1;
+ while (s->bl_count[bits] == 0) bits--;
+ s->bl_count[bits]--; /* move one leaf down the tree */
+ s->bl_count[bits+1] += 2; /* move one overflow item as its brother */
+ s->bl_count[max_length]--;
+ /* The brother of the overflow item also moves one step up,
+ * but this does not affect bl_count[max_length]
+ */
+ overflow -= 2;
+ } while (overflow > 0);
+
+ /* Now recompute all bit lengths, scanning in increasing frequency.
+ * h is still equal to HEAP_SIZE. (It is simpler to reconstruct all
+ * lengths instead of fixing only the wrong ones. This idea is taken
+ * from 'ar' written by Haruhiko Okumura.)
+ */
+ for (bits = max_length; bits != 0; bits--) {+ n = s->bl_count[bits];
+ while (n != 0) {+ m = s->heap[--h];
+ if (m > max_code) continue;
+ if (tree[m].Len != (unsigned) bits) {+ Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
+ s->opt_len += ((long)bits - (long)tree[m].Len)
+ *(long)tree[m].Freq;
+ tree[m].Len = (ush)bits;
+ }
+ n--;
+ }
+ }
+}
+
+/* ===========================================================================
+ * Generate the codes for a given tree and bit counts (which need not be
+ * optimal).
+ * IN assertion: the array bl_count contains the bit length statistics for
+ * the given tree and the field len is set for all tree elements.
+ * OUT assertion: the field code is set for all tree elements of non
+ * zero code length.
+ */
+local void gen_codes (tree, max_code, bl_count)
+ ct_data *tree; /* the tree to decorate */
+ int max_code; /* largest code with non zero frequency */
+ ushf *bl_count; /* number of codes at each bit length */
+{+ ush next_code[MAX_BITS+1]; /* next code value for each bit length */
+ ush code = 0; /* running code value */
+ int bits; /* bit index */
+ int n; /* code index */
+
+ /* The distribution counts are first used to generate the code values
+ * without bit reversal.
+ */
+ for (bits = 1; bits <= MAX_BITS; bits++) {+ next_code[bits] = code = (code + bl_count[bits-1]) << 1;
+ }
+ /* Check that the bit counts in bl_count are consistent. The last code
+ * must be all ones.
+ */
+ Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,
+ "inconsistent bit counts");
+ Tracev((stderr,"\ngen_codes: max_code %d ", max_code));
+
+ for (n = 0; n <= max_code; n++) {+ int len = tree[n].Len;
+ if (len == 0) continue;
+ /* Now reverse the bits */
+ tree[n].Code = bi_reverse(next_code[len]++, len);
+
+ Tracecv(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
+ n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
+ }
+}
+
+/* ===========================================================================
+ * Construct one Huffman tree and assigns the code bit strings and lengths.
+ * Update the total bit length for the current block.
+ * IN assertion: the field freq is set for all tree elements.
+ * OUT assertions: the fields len and code are set to the optimal bit length
+ * and corresponding code. The length opt_len is updated; static_len is
+ * also updated if stree is not null. The field max_code is set.
+ */
+local void build_tree(s, desc)
+ deflate_state *s;
+ tree_desc *desc; /* the tree descriptor */
+{+ ct_data *tree = desc->dyn_tree;
+ const ct_data *stree = desc->stat_desc->static_tree;
+ int elems = desc->stat_desc->elems;
+ int n, m; /* iterate over heap elements */
+ int max_code = -1; /* largest code with non zero frequency */
+ int node; /* new node being created */
+
+ /* Construct the initial heap, with least frequent element in
+ * heap[SMALLEST]. The sons of heap[n] are heap[2*n] and heap[2*n+1].
+ * heap[0] is not used.
+ */
+ s->heap_len = 0, s->heap_max = HEAP_SIZE;
+
+ for (n = 0; n < elems; n++) {+ if (tree[n].Freq != 0) {+ s->heap[++(s->heap_len)] = max_code = n;
+ s->depth[n] = 0;
+ } else {+ tree[n].Len = 0;
+ }
+ }
+
+ /* The pkzip format requires that at least one distance code exists,
+ * and that at least one bit should be sent even if there is only one
+ * possible code. So to avoid special checks later on we force at least
+ * two codes of non zero frequency.
+ */
+ while (s->heap_len < 2) {+ node = s->heap[++(s->heap_len)] = (max_code < 2 ? ++max_code : 0);
+ tree[node].Freq = 1;
+ s->depth[node] = 0;
+ s->opt_len--; if (stree) s->static_len -= stree[node].Len;
+ /* node is 0 or 1 so it does not have extra bits */
+ }
+ desc->max_code = max_code;
+
+ /* The elements heap[heap_len/2+1 .. heap_len] are leaves of the tree,
+ * establish sub-heaps of increasing lengths:
+ */
+ for (n = s->heap_len/2; n >= 1; n--) pqdownheap(s, tree, n);
+
+ /* Construct the Huffman tree by repeatedly combining the least two
+ * frequent nodes.
+ */
+ node = elems; /* next internal node of the tree */
+ do {+ pqremove(s, tree, n); /* n = node of least frequency */
+ m = s->heap[SMALLEST]; /* m = node of next least frequency */
+
+ s->heap[--(s->heap_max)] = n; /* keep the nodes sorted by frequency */
+ s->heap[--(s->heap_max)] = m;
+
+ /* Create a new node father of n and m */
+ tree[node].Freq = tree[n].Freq + tree[m].Freq;
+ s->depth[node] = (uch)((s->depth[n] >= s->depth[m] ?
+ s->depth[n] : s->depth[m]) + 1);
+ tree[n].Dad = tree[m].Dad = (ush)node;
+#ifdef DUMP_BL_TREE
+ if (tree == s->bl_tree) {+ fprintf(stderr,"\nnode %d(%d), sons %d(%d) %d(%d)",
+ node, tree[node].Freq, n, tree[n].Freq, m, tree[m].Freq);
+ }
+#endif
+ /* and insert the new node in the heap */
+ s->heap[SMALLEST] = node++;
+ pqdownheap(s, tree, SMALLEST);
+
+ } while (s->heap_len >= 2);
+
+ s->heap[--(s->heap_max)] = s->heap[SMALLEST];
+
+ /* At this point, the fields freq and dad are set. We can now
+ * generate the bit lengths.
+ */
+ gen_bitlen(s, (tree_desc *)desc);
+
+ /* The field len is now set, we can generate the bit codes */
+ gen_codes ((ct_data *)tree, max_code, s->bl_count);
+}
+
+/* ===========================================================================
+ * Scan a literal or distance tree to determine the frequencies of the codes
+ * in the bit length tree.
+ */
+local void scan_tree (s, tree, max_code)
+ deflate_state *s;
+ ct_data *tree; /* the tree to be scanned */
+ int max_code; /* and its largest code of non zero frequency */
+{+ int n; /* iterates over all tree elements */
+ int prevlen = -1; /* last emitted length */
+ int curlen; /* length of current code */
+ int nextlen = tree[0].Len; /* length of next code */
+ int count = 0; /* repeat count of the current code */
+ int max_count = 7; /* max repeat count */
+ int min_count = 4; /* min repeat count */
+
+ if (nextlen == 0) max_count = 138, min_count = 3;
+ tree[max_code+1].Len = (ush)0xffff; /* guard */
+
+ for (n = 0; n <= max_code; n++) {+ curlen = nextlen; nextlen = tree[n+1].Len;
+ if (++count < max_count && curlen == nextlen) {+ continue;
+ } else if (count < min_count) {+ s->bl_tree[curlen].Freq += count;
+ } else if (curlen != 0) {+ if (curlen != prevlen) s->bl_tree[curlen].Freq++;
+ s->bl_tree[REP_3_6].Freq++;
+ } else if (count <= 10) {+ s->bl_tree[REPZ_3_10].Freq++;
+ } else {+ s->bl_tree[REPZ_11_138].Freq++;
+ }
+ count = 0; prevlen = curlen;
+ if (nextlen == 0) {+ max_count = 138, min_count = 3;
+ } else if (curlen == nextlen) {+ max_count = 6, min_count = 3;
+ } else {+ max_count = 7, min_count = 4;
+ }
+ }
+}
+
+/* ===========================================================================
+ * Send a literal or distance tree in compressed form, using the codes in
+ * bl_tree.
+ */
+local void send_tree (s, tree, max_code)
+ deflate_state *s;
+ ct_data *tree; /* the tree to be scanned */
+ int max_code; /* and its largest code of non zero frequency */
+{+ int n; /* iterates over all tree elements */
+ int prevlen = -1; /* last emitted length */
+ int curlen; /* length of current code */
+ int nextlen = tree[0].Len; /* length of next code */
+ int count = 0; /* repeat count of the current code */
+ int max_count = 7; /* max repeat count */
+ int min_count = 4; /* min repeat count */
+
+ /* tree[max_code+1].Len = -1; */ /* guard already set */
+ if (nextlen == 0) max_count = 138, min_count = 3;
+
+ for (n = 0; n <= max_code; n++) {+ curlen = nextlen; nextlen = tree[n+1].Len;
+ if (++count < max_count && curlen == nextlen) {+ continue;
+ } else if (count < min_count) {+ do { send_code(s, curlen, s->bl_tree); } while (--count != 0);+
+ } else if (curlen != 0) {+ if (curlen != prevlen) {+ send_code(s, curlen, s->bl_tree); count--;
+ }
+ Assert(count >= 3 && count <= 6, " 3_6?");
+ send_code(s, REP_3_6, s->bl_tree); send_bits(s, count-3, 2);
+
+ } else if (count <= 10) {+ send_code(s, REPZ_3_10, s->bl_tree); send_bits(s, count-3, 3);
+
+ } else {+ send_code(s, REPZ_11_138, s->bl_tree); send_bits(s, count-11, 7);
+ }
+ count = 0; prevlen = curlen;
+ if (nextlen == 0) {+ max_count = 138, min_count = 3;
+ } else if (curlen == nextlen) {+ max_count = 6, min_count = 3;
+ } else {+ max_count = 7, min_count = 4;
+ }
+ }
+}
+
+/* ===========================================================================
+ * Construct the Huffman tree for the bit lengths and return the index in
+ * bl_order of the last bit length code to send.
+ */
+local int build_bl_tree(s)
+ deflate_state *s;
+{+ int max_blindex; /* index of last bit length code of non zero freq */
+
+ /* Determine the bit length frequencies for literal and distance trees */
+ scan_tree(s, (ct_data *)s->dyn_ltree, s->l_desc.max_code);
+ scan_tree(s, (ct_data *)s->dyn_dtree, s->d_desc.max_code);
+
+ /* Build the bit length tree: */
+ build_tree(s, (tree_desc *)(&(s->bl_desc)));
+ /* opt_len now includes the length of the tree representations, except
+ * the lengths of the bit lengths codes and the 5+5+4 bits for the counts.
+ */
+
+ /* Determine the number of bit length codes to send. The pkzip format
+ * requires that at least 4 bit length codes be sent. (appnote.txt says
+ * 3 but the actual value used is 4.)
+ */
+ for (max_blindex = BL_CODES-1; max_blindex >= 3; max_blindex--) {+ if (s->bl_tree[bl_order[max_blindex]].Len != 0) break;
+ }
+ /* Update opt_len to include the bit length tree and counts */
+ s->opt_len += 3*(max_blindex+1) + 5+5+4;
+ Tracev((stderr, "\ndyn trees: dyn %ld, stat %ld",
+ s->opt_len, s->static_len));
+
+ return max_blindex;
+}
+
+/* ===========================================================================
+ * Send the header for a block using dynamic Huffman trees: the counts, the
+ * lengths of the bit length codes, the literal tree and the distance tree.
+ * IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
+ */
+local void send_all_trees(s, lcodes, dcodes, blcodes)
+ deflate_state *s;
+ int lcodes, dcodes, blcodes; /* number of codes for each tree */
+{+ int rank; /* index in bl_order */
+
+ Assert (lcodes >= 257 && dcodes >= 1 && blcodes >= 4, "not enough codes");
+ Assert (lcodes <= L_CODES && dcodes <= D_CODES && blcodes <= BL_CODES,
+ "too many codes");
+ Tracev((stderr, "\nbl counts: "));
+ send_bits(s, lcodes-257, 5); /* not +255 as stated in appnote.txt */
+ send_bits(s, dcodes-1, 5);
+ send_bits(s, blcodes-4, 4); /* not -3 as stated in appnote.txt */
+ for (rank = 0; rank < blcodes; rank++) {+ Tracev((stderr, "\nbl code %2d ", bl_order[rank]));
+ send_bits(s, s->bl_tree[bl_order[rank]].Len, 3);
+ }
+ Tracev((stderr, "\nbl tree: sent %ld", s->bits_sent));
+
+ send_tree(s, (ct_data *)s->dyn_ltree, lcodes-1); /* literal tree */
+ Tracev((stderr, "\nlit tree: sent %ld", s->bits_sent));
+
+ send_tree(s, (ct_data *)s->dyn_dtree, dcodes-1); /* distance tree */
+ Tracev((stderr, "\ndist tree: sent %ld", s->bits_sent));
+}
+
+/* ===========================================================================
+ * Send a stored block
+ */
+void _tr_stored_block(s, buf, stored_len, eof)
+ deflate_state *s;
+ charf *buf; /* input block */
+ ulg stored_len; /* length of input block */
+ int eof; /* true if this is the last block for a file */
+{+ send_bits(s, (STORED_BLOCK<<1)+eof, 3); /* send block type */
+#ifdef DEBUG
+ s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
+ s->compressed_len += (stored_len + 4) << 3;
+#endif
+ copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
+}
+
+/* ===========================================================================
+ * Send one empty static block to give enough lookahead for inflate.
+ * This takes 10 bits, of which 7 may remain in the bit buffer.
+ * The current inflate code requires 9 bits of lookahead. If the
+ * last two codes for the previous block (real code plus EOB) were coded
+ * on 5 bits or less, inflate may have only 5+3 bits of lookahead to decode
+ * the last real code. In this case we send two empty static blocks instead
+ * of one. (There are no problems if the previous block is stored or fixed.)
+ * To simplify the code, we assume the worst case of last real code encoded
+ * on one bit only.
+ */
+void _tr_align(s)
+ deflate_state *s;
+{+ send_bits(s, STATIC_TREES<<1, 3);
+ send_code(s, END_BLOCK, static_ltree);
+#ifdef DEBUG
+ s->compressed_len += 10L; /* 3 for block type, 7 for EOB */
+#endif
+ bi_flush(s);
+ /* Of the 10 bits for the empty block, we have already sent
+ * (10 - bi_valid) bits. The lookahead for the last real code (before
+ * the EOB of the previous block) was thus at least one plus the length
+ * of the EOB plus what we have just sent of the empty static block.
+ */
+ if (1 + s->last_eob_len + 10 - s->bi_valid < 9) {+ send_bits(s, STATIC_TREES<<1, 3);
+ send_code(s, END_BLOCK, static_ltree);
+#ifdef DEBUG
+ s->compressed_len += 10L;
+#endif
+ bi_flush(s);
+ }
+ s->last_eob_len = 7;
+}
+
+/* ===========================================================================
+ * Determine the best encoding for the current block: dynamic trees, static
+ * trees or store, and output the encoded block to the zip file.
+ */
+void _tr_flush_block(s, buf, stored_len, eof)
+ deflate_state *s;
+ charf *buf; /* input block, or NULL if too old */
+ ulg stored_len; /* length of input block */
+ int eof; /* true if this is the last block for a file */
+{+ ulg opt_lenb, static_lenb; /* opt_len and static_len in bytes */
+ int max_blindex = 0; /* index of last bit length code of non zero freq */
+
+ /* Build the Huffman trees unless a stored block is forced */
+ if (s->level > 0) {+
+ /* Check if the file is ascii or binary */
+ if (s->strm->data_type == Z_UNKNOWN) set_data_type(s);
+
+ /* Construct the literal and distance trees */
+ build_tree(s, (tree_desc *)(&(s->l_desc)));
+ Tracev((stderr, "\nlit data: dyn %ld, stat %ld", s->opt_len,
+ s->static_len));
+
+ build_tree(s, (tree_desc *)(&(s->d_desc)));
+ Tracev((stderr, "\ndist data: dyn %ld, stat %ld", s->opt_len,
+ s->static_len));
+ /* At this point, opt_len and static_len are the total bit lengths of
+ * the compressed block data, excluding the tree representations.
+ */
+
+ /* Build the bit length tree for the above two trees, and get the index
+ * in bl_order of the last bit length code to send.
+ */
+ max_blindex = build_bl_tree(s);
+
+ /* Determine the best encoding. Compute the block lengths in bytes. */
+ opt_lenb = (s->opt_len+3+7)>>3;
+ static_lenb = (s->static_len+3+7)>>3;
+
+ Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
+ opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
+ s->last_lit));
+
+ if (static_lenb <= opt_lenb) opt_lenb = static_lenb;
+
+ } else {+ Assert(buf != (char*)0, "lost buf");
+ opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
+ }
+
+#ifdef FORCE_STORED
+ if (buf != (char*)0) { /* force stored block */+#else
+ if (stored_len+4 <= opt_lenb && buf != (char*)0) {+ /* 4: two words for the lengths */
+#endif
+ /* The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE.
+ * Otherwise we can't have processed more than WSIZE input bytes since
+ * the last block flush, because compression would have been
+ * successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
+ * transform a block into a stored block.
+ */
+ _tr_stored_block(s, buf, stored_len, eof);
+
+#ifdef FORCE_STATIC
+ } else if (static_lenb >= 0) { /* force static trees */+#else
+ } else if (static_lenb == opt_lenb) {+#endif
+ send_bits(s, (STATIC_TREES<<1)+eof, 3);
+ compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree);
+#ifdef DEBUG
+ s->compressed_len += 3 + s->static_len;
+#endif
+ } else {+ send_bits(s, (DYN_TREES<<1)+eof, 3);
+ send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1,
+ max_blindex+1);
+ compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree);
+#ifdef DEBUG
+ s->compressed_len += 3 + s->opt_len;
+#endif
+ }
+ Assert (s->compressed_len == s->bits_sent, "bad compressed size");
+ /* The above check is made mod 2^32, for files larger than 512 MB
+ * and uLong implemented on 32 bits.
+ */
+ init_block(s);
+
+ if (eof) {+ bi_windup(s);
+#ifdef DEBUG
+ s->compressed_len += 7; /* align on byte boundary */
+#endif
+ }
+ Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
+ s->compressed_len-7*eof));
+}
+
+/* ===========================================================================
+ * Save the match info and tally the frequency counts. Return true if
+ * the current block must be flushed.
+ */
+int _tr_tally (s, dist, lc)
+ deflate_state *s;
+ unsigned dist; /* distance of matched string */
+ unsigned lc; /* match length-MIN_MATCH or unmatched char (if dist==0) */
+{+ s->d_buf[s->last_lit] = (ush)dist;
+ s->l_buf[s->last_lit++] = (uch)lc;
+ if (dist == 0) {+ /* lc is the unmatched char */
+ s->dyn_ltree[lc].Freq++;
+ } else {+ s->matches++;
+ /* Here, lc is the match length - MIN_MATCH */
+ dist--; /* dist = match distance - 1 */
+ Assert((ush)dist < (ush)MAX_DIST(s) &&
+ (ush)lc <= (ush)(MAX_MATCH-MIN_MATCH) &&
+ (ush)d_code(dist) < (ush)D_CODES, "_tr_tally: bad match");
+
+ s->dyn_ltree[_length_code[lc]+LITERALS+1].Freq++;
+ s->dyn_dtree[d_code(dist)].Freq++;
+ }
+
+#ifdef TRUNCATE_BLOCK
+ /* Try to guess if it is profitable to stop the current block here */
+ if ((s->last_lit & 0x1fff) == 0 && s->level > 2) {+ /* Compute an upper bound for the compressed length */
+ ulg out_length = (ulg)s->last_lit*8L;
+ ulg in_length = (ulg)((long)s->strstart - s->block_start);
+ int dcode;
+ for (dcode = 0; dcode < D_CODES; dcode++) {+ out_length += (ulg)s->dyn_dtree[dcode].Freq *
+ (5L+extra_dbits[dcode]);
+ }
+ out_length >>= 3;
+ Tracev((stderr,"\nlast_lit %u, in %ld, out ~%ld(%ld%%) ",
+ s->last_lit, in_length, out_length,
+ 100L - out_length*100L/in_length));
+ if (s->matches < s->last_lit/2 && out_length < in_length/2) return 1;
+ }
+#endif
+ return (s->last_lit == s->lit_bufsize-1);
+ /* We avoid equality with lit_bufsize because of wraparound at 64K
+ * on 16 bit machines and because stored blocks are restricted to
+ * 64K-1 bytes.
+ */
+}
+
+/* ===========================================================================
+ * Send the block data compressed using the given Huffman trees
+ */
+local void compress_block(s, ltree, dtree)
+ deflate_state *s;
+ ct_data *ltree; /* literal tree */
+ ct_data *dtree; /* distance tree */
+{+ unsigned dist; /* distance of matched string */
+ int lc; /* match length or unmatched char (if dist == 0) */
+ unsigned lx = 0; /* running index in l_buf */
+ unsigned code; /* the code to send */
+ int extra; /* number of extra bits to send */
+
+ if (s->last_lit != 0) do {+ dist = s->d_buf[lx];
+ lc = s->l_buf[lx++];
+ if (dist == 0) {+ send_code(s, lc, ltree); /* send a literal byte */
+ Tracecv(isgraph(lc), (stderr," '%c' ", lc));
+ } else {+ /* Here, lc is the match length - MIN_MATCH */
+ code = _length_code[lc];
+ send_code(s, code+LITERALS+1, ltree); /* send the length code */
+ extra = extra_lbits[code];
+ if (extra != 0) {+ lc -= base_length[code];
+ send_bits(s, lc, extra); /* send the extra length bits */
+ }
+ dist--; /* dist is now the match distance - 1 */
+ code = d_code(dist);
+ Assert (code < D_CODES, "bad d_code");
+
+ send_code(s, code, dtree); /* send the distance code */
+ extra = extra_dbits[code];
+ if (extra != 0) {+ dist -= base_dist[code];
+ send_bits(s, dist, extra); /* send the extra distance bits */
+ }
+ } /* literal or match pair ? */
+
+ /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
+ Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
+ "pendingBuf overflow");
+
+ } while (lx < s->last_lit);
+
+ send_code(s, END_BLOCK, ltree);
+ s->last_eob_len = ltree[END_BLOCK].Len;
+}
+
+/* ===========================================================================
+ * Set the data type to ASCII or BINARY, using a crude approximation:
+ * binary if more than 20% of the bytes are <= 6 or >= 128, ascii otherwise.
+ * IN assertion: the fields freq of dyn_ltree are set and the total of all
+ * frequencies does not exceed 64K (to fit in an int on 16 bit machines).
+ */
+local void set_data_type(s)
+ deflate_state *s;
+{+ int n = 0;
+ unsigned ascii_freq = 0;
+ unsigned bin_freq = 0;
+ while (n < 7) bin_freq += s->dyn_ltree[n++].Freq;
+ while (n < 128) ascii_freq += s->dyn_ltree[n++].Freq;
+ while (n < LITERALS) bin_freq += s->dyn_ltree[n++].Freq;
+ s->strm->data_type = bin_freq > (ascii_freq >> 2) ? Z_BINARY : Z_ASCII;
+}
+
+/* ===========================================================================
+ * Reverse the first len bits of a code, using straightforward code (a faster
+ * method would use a table)
+ * IN assertion: 1 <= len <= 15
+ */
+local unsigned bi_reverse(code, len)
+ unsigned code; /* the value to invert */
+ int len; /* its bit length */
+{+ register unsigned res = 0;
+ do {+ res |= code & 1;
+ code >>= 1, res <<= 1;
+ } while (--len > 0);
+ return res >> 1;
+}
+
+/* ===========================================================================
+ * Flush the bit buffer, keeping at most 7 bits in it.
+ */
+local void bi_flush(s)
+ deflate_state *s;
+{+ if (s->bi_valid == 16) {+ put_short(s, s->bi_buf);
+ s->bi_buf = 0;
+ s->bi_valid = 0;
+ } else if (s->bi_valid >= 8) {+ put_byte(s, (Byte)s->bi_buf);
+ s->bi_buf >>= 8;
+ s->bi_valid -= 8;
+ }
+}
+
+/* ===========================================================================
+ * Flush the bit buffer and align the output on a byte boundary
+ */
+local void bi_windup(s)
+ deflate_state *s;
+{+ if (s->bi_valid > 8) {+ put_short(s, s->bi_buf);
+ } else if (s->bi_valid > 0) {+ put_byte(s, (Byte)s->bi_buf);
+ }
+ s->bi_buf = 0;
+ s->bi_valid = 0;
+#ifdef DEBUG
+ s->bits_sent = (s->bits_sent+7) & ~7;
+#endif
+}
+
+/* ===========================================================================
+ * Copy a stored block, storing first the length and its
+ * one's complement if requested.
+ */
+local void copy_block(s, buf, len, header)
+ deflate_state *s;
+ charf *buf; /* the input data */
+ unsigned len; /* its length */
+ int header; /* true if block header must be written */
+{+ bi_windup(s); /* align on byte boundary */
+ s->last_eob_len = 8; /* enough lookahead for inflate */
+
+ if (header) {+ put_short(s, (ush)len);
+ put_short(s, (ush)~len);
+#ifdef DEBUG
+ s->bits_sent += 2*16;
+#endif
+ }
+#ifdef DEBUG
+ s->bits_sent += (ulg)len<<3;
+#endif
+ while (len--) {+ put_byte(s, *buf++);
+ }
+}
--- /dev/null
+++ b/src/gfx/zlib/trees.h
@@ -1,0 +1,128 @@
+/* header created automatically with -DGEN_TREES_H */
+
+local const ct_data static_ltree[L_CODES+2] = {+{{ 12},{ 8}}, {{140},{ 8}}, {{ 76},{ 8}}, {{204},{ 8}}, {{ 44},{ 8}},+{{172},{ 8}}, {{108},{ 8}}, {{236},{ 8}}, {{ 28},{ 8}}, {{156},{ 8}},+{{ 92},{ 8}}, {{220},{ 8}}, {{ 60},{ 8}}, {{188},{ 8}}, {{124},{ 8}},+{{252},{ 8}}, {{ 2},{ 8}}, {{130},{ 8}}, {{ 66},{ 8}}, {{194},{ 8}},+{{ 34},{ 8}}, {{162},{ 8}}, {{ 98},{ 8}}, {{226},{ 8}}, {{ 18},{ 8}},+{{146},{ 8}}, {{ 82},{ 8}}, {{210},{ 8}}, {{ 50},{ 8}}, {{178},{ 8}},+{{114},{ 8}}, {{242},{ 8}}, {{ 10},{ 8}}, {{138},{ 8}}, {{ 74},{ 8}},+{{202},{ 8}}, {{ 42},{ 8}}, {{170},{ 8}}, {{106},{ 8}}, {{234},{ 8}},+{{ 26},{ 8}}, {{154},{ 8}}, {{ 90},{ 8}}, {{218},{ 8}}, {{ 58},{ 8}},+{{186},{ 8}}, {{122},{ 8}}, {{250},{ 8}}, {{ 6},{ 8}}, {{134},{ 8}},+{{ 70},{ 8}}, {{198},{ 8}}, {{ 38},{ 8}}, {{166},{ 8}}, {{102},{ 8}},+{{230},{ 8}}, {{ 22},{ 8}}, {{150},{ 8}}, {{ 86},{ 8}}, {{214},{ 8}},+{{ 54},{ 8}}, {{182},{ 8}}, {{118},{ 8}}, {{246},{ 8}}, {{ 14},{ 8}},+{{142},{ 8}}, {{ 78},{ 8}}, {{206},{ 8}}, {{ 46},{ 8}}, {{174},{ 8}},+{{110},{ 8}}, {{238},{ 8}}, {{ 30},{ 8}}, {{158},{ 8}}, {{ 94},{ 8}},+{{222},{ 8}}, {{ 62},{ 8}}, {{190},{ 8}}, {{126},{ 8}}, {{254},{ 8}},+{{ 1},{ 8}}, {{129},{ 8}}, {{ 65},{ 8}}, {{193},{ 8}}, {{ 33},{ 8}},+{{161},{ 8}}, {{ 97},{ 8}}, {{225},{ 8}}, {{ 17},{ 8}}, {{145},{ 8}},+{{ 81},{ 8}}, {{209},{ 8}}, {{ 49},{ 8}}, {{177},{ 8}}, {{113},{ 8}},+{{241},{ 8}}, {{ 9},{ 8}}, {{137},{ 8}}, {{ 73},{ 8}}, {{201},{ 8}},+{{ 41},{ 8}}, {{169},{ 8}}, {{105},{ 8}}, {{233},{ 8}}, {{ 25},{ 8}},+{{153},{ 8}}, {{ 89},{ 8}}, {{217},{ 8}}, {{ 57},{ 8}}, {{185},{ 8}},+{{121},{ 8}}, {{249},{ 8}}, {{ 5},{ 8}}, {{133},{ 8}}, {{ 69},{ 8}},+{{197},{ 8}}, {{ 37},{ 8}}, {{165},{ 8}}, {{101},{ 8}}, {{229},{ 8}},+{{ 21},{ 8}}, {{149},{ 8}}, {{ 85},{ 8}}, {{213},{ 8}}, {{ 53},{ 8}},+{{181},{ 8}}, {{117},{ 8}}, {{245},{ 8}}, {{ 13},{ 8}}, {{141},{ 8}},+{{ 77},{ 8}}, {{205},{ 8}}, {{ 45},{ 8}}, {{173},{ 8}}, {{109},{ 8}},+{{237},{ 8}}, {{ 29},{ 8}}, {{157},{ 8}}, {{ 93},{ 8}}, {{221},{ 8}},+{{ 61},{ 8}}, {{189},{ 8}}, {{125},{ 8}}, {{253},{ 8}}, {{ 19},{ 9}},+{{275},{ 9}}, {{147},{ 9}}, {{403},{ 9}}, {{ 83},{ 9}}, {{339},{ 9}},+{{211},{ 9}}, {{467},{ 9}}, {{ 51},{ 9}}, {{307},{ 9}}, {{179},{ 9}},+{{435},{ 9}}, {{115},{ 9}}, {{371},{ 9}}, {{243},{ 9}}, {{499},{ 9}},+{{ 11},{ 9}}, {{267},{ 9}}, {{139},{ 9}}, {{395},{ 9}}, {{ 75},{ 9}},+{{331},{ 9}}, {{203},{ 9}}, {{459},{ 9}}, {{ 43},{ 9}}, {{299},{ 9}},+{{171},{ 9}}, {{427},{ 9}}, {{107},{ 9}}, {{363},{ 9}}, {{235},{ 9}},+{{491},{ 9}}, {{ 27},{ 9}}, {{283},{ 9}}, {{155},{ 9}}, {{411},{ 9}},+{{ 91},{ 9}}, {{347},{ 9}}, {{219},{ 9}}, {{475},{ 9}}, {{ 59},{ 9}},+{{315},{ 9}}, {{187},{ 9}}, {{443},{ 9}}, {{123},{ 9}}, {{379},{ 9}},+{{251},{ 9}}, {{507},{ 9}}, {{ 7},{ 9}}, {{263},{ 9}}, {{135},{ 9}},+{{391},{ 9}}, {{ 71},{ 9}}, {{327},{ 9}}, {{199},{ 9}}, {{455},{ 9}},+{{ 39},{ 9}}, {{295},{ 9}}, {{167},{ 9}}, {{423},{ 9}}, {{103},{ 9}},+{{359},{ 9}}, {{231},{ 9}}, {{487},{ 9}}, {{ 23},{ 9}}, {{279},{ 9}},+{{151},{ 9}}, {{407},{ 9}}, {{ 87},{ 9}}, {{343},{ 9}}, {{215},{ 9}},+{{471},{ 9}}, {{ 55},{ 9}}, {{311},{ 9}}, {{183},{ 9}}, {{439},{ 9}},+{{119},{ 9}}, {{375},{ 9}}, {{247},{ 9}}, {{503},{ 9}}, {{ 15},{ 9}},+{{271},{ 9}}, {{143},{ 9}}, {{399},{ 9}}, {{ 79},{ 9}}, {{335},{ 9}},+{{207},{ 9}}, {{463},{ 9}}, {{ 47},{ 9}}, {{303},{ 9}}, {{175},{ 9}},+{{431},{ 9}}, {{111},{ 9}}, {{367},{ 9}}, {{239},{ 9}}, {{495},{ 9}},+{{ 31},{ 9}}, {{287},{ 9}}, {{159},{ 9}}, {{415},{ 9}}, {{ 95},{ 9}},+{{351},{ 9}}, {{223},{ 9}}, {{479},{ 9}}, {{ 63},{ 9}}, {{319},{ 9}},+{{191},{ 9}}, {{447},{ 9}}, {{127},{ 9}}, {{383},{ 9}}, {{255},{ 9}},+{{511},{ 9}}, {{ 0},{ 7}}, {{ 64},{ 7}}, {{ 32},{ 7}}, {{ 96},{ 7}},+{{ 16},{ 7}}, {{ 80},{ 7}}, {{ 48},{ 7}}, {{112},{ 7}}, {{ 8},{ 7}},+{{ 72},{ 7}}, {{ 40},{ 7}}, {{104},{ 7}}, {{ 24},{ 7}}, {{ 88},{ 7}},+{{ 56},{ 7}}, {{120},{ 7}}, {{ 4},{ 7}}, {{ 68},{ 7}}, {{ 36},{ 7}},+{{100},{ 7}}, {{ 20},{ 7}}, {{ 84},{ 7}}, {{ 52},{ 7}}, {{116},{ 7}},+{{ 3},{ 8}}, {{131},{ 8}}, {{ 67},{ 8}}, {{195},{ 8}}, {{ 35},{ 8}},+{{163},{ 8}}, {{ 99},{ 8}}, {{227},{ 8}}+};
+
+local const ct_data static_dtree[D_CODES] = {+{{ 0},{ 5}}, {{16},{ 5}}, {{ 8},{ 5}}, {{24},{ 5}}, {{ 4},{ 5}},+{{20},{ 5}}, {{12},{ 5}}, {{28},{ 5}}, {{ 2},{ 5}}, {{18},{ 5}},+{{10},{ 5}}, {{26},{ 5}}, {{ 6},{ 5}}, {{22},{ 5}}, {{14},{ 5}},+{{30},{ 5}}, {{ 1},{ 5}}, {{17},{ 5}}, {{ 9},{ 5}}, {{25},{ 5}},+{{ 5},{ 5}}, {{21},{ 5}}, {{13},{ 5}}, {{29},{ 5}}, {{ 3},{ 5}},+{{19},{ 5}}, {{11},{ 5}}, {{27},{ 5}}, {{ 7},{ 5}}, {{23},{ 5}}+};
+
+const uch _dist_code[DIST_CODE_LEN] = {+ 0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8,
+ 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10,
+10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
+12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13,
+13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15,
+15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 0, 0, 16, 17,
+18, 18, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 22,
+23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+24, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27,
+27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+28, 28, 28, 28, 28, 28, 28, 28, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29
+};
+
+const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12, 12,
+13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16,
+17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19,
+19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22,
+22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 23, 23, 23,
+23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26,
+26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 28
+};
+
+local const int base_length[LENGTH_CODES] = {+0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56,
+64, 80, 96, 112, 128, 160, 192, 224, 0
+};
+
+local const int base_dist[D_CODES] = {+ 0, 1, 2, 3, 4, 6, 8, 12, 16, 24,
+ 32, 48, 64, 96, 128, 192, 256, 384, 512, 768,
+ 1024, 1536, 2048, 3072, 4096, 6144, 8192, 12288, 16384, 24576
+};
+
--- /dev/null
+++ b/src/gfx/zlib/uncompr.c
@@ -1,0 +1,61 @@
+/* uncompr.c -- decompress a memory buffer
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id: uncompr.c,v 1.1.1.1 2005/04/24 21:39:38 giles Exp $ */
+
+#define ZLIB_INTERNAL
+#include "zlib.h"
+
+/* ===========================================================================
+ Decompresses the source buffer into the destination buffer. sourceLen is
+ the byte length of the source buffer. Upon entry, destLen is the total
+ size of the destination buffer, which must be large enough to hold the
+ entire uncompressed data. (The size of the uncompressed data must have
+ been saved previously by the compressor and transmitted to the decompressor
+ by some mechanism outside the scope of this compression library.)
+ Upon exit, destLen is the actual size of the compressed buffer.
+ This function can be used to decompress a whole file at once if the
+ input file is mmap'ed.
+
+ uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_BUF_ERROR if there was not enough room in the output
+ buffer, or Z_DATA_ERROR if the input data was corrupted.
+*/
+int ZEXPORT uncompress (dest, destLen, source, sourceLen)
+ Bytef *dest;
+ uLongf *destLen;
+ const Bytef *source;
+ uLong sourceLen;
+{+ z_stream stream;
+ int err;
+
+ stream.next_in = (Bytef*)source;
+ stream.avail_in = (uInt)sourceLen;
+ /* Check for source > 64K on 16-bit machine: */
+ if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
+
+ stream.next_out = dest;
+ stream.avail_out = (uInt)*destLen;
+ if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
+
+ stream.zalloc = (alloc_func)0;
+ stream.zfree = (free_func)0;
+
+ err = inflateInit(&stream);
+ if (err != Z_OK) return err;
+
+ err = inflate(&stream, Z_FINISH);
+ if (err != Z_STREAM_END) {+ inflateEnd(&stream);
+ if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
+ return Z_DATA_ERROR;
+ return err;
+ }
+ *destLen = stream.total_out;
+
+ err = inflateEnd(&stream);
+ return err;
+}
--- /dev/null
+++ b/src/gfx/zlib/zconf.h
@@ -1,0 +1,327 @@
+/* zconf.h -- configuration of the zlib compression library
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id: zconf.h,v 1.1.1.1 2005/04/24 21:39:38 giles Exp $ */
+
+#ifndef ZCONF_H
+#define ZCONF_H
+
+/*
+ * If you *really* need a unique prefix for all types and library functions,
+ * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
+ */
+#ifdef Z_PREFIX
+# define deflateInit_ z_deflateInit_
+# define deflate z_deflate
+# define deflateEnd z_deflateEnd
+# define inflateInit_ z_inflateInit_
+# define inflate z_inflate
+# define inflateEnd z_inflateEnd
+# define deflateInit2_ z_deflateInit2_
+# define deflateSetDictionary z_deflateSetDictionary
+# define deflateCopy z_deflateCopy
+# define deflateReset z_deflateReset
+# define deflateParams z_deflateParams
+# define deflateBound z_deflateBound
+# define deflatePrime z_deflatePrime
+# define inflateInit2_ z_inflateInit2_
+# define inflateSetDictionary z_inflateSetDictionary
+# define inflateSync z_inflateSync
+# define inflateSyncPoint z_inflateSyncPoint
+# define inflateCopy z_inflateCopy
+# define inflateReset z_inflateReset
+# define inflateBack z_inflateBack
+# define inflateBackEnd z_inflateBackEnd
+# define compress z_compress
+# define compress2 z_compress2
+# define compressBound z_compressBound
+# define uncompress z_uncompress
+# define adler32 z_adler32
+# define crc32 z_crc32
+# define get_crc_table z_get_crc_table
+# define zError z_zError
+
+# define Byte z_Byte
+# define uInt z_uInt
+# define uLong z_uLong
+# define Bytef z_Bytef
+# define charf z_charf
+# define intf z_intf
+# define uIntf z_uIntf
+# define uLongf z_uLongf
+# define voidpf z_voidpf
+# define voidp z_voidp
+#endif
+
+#if defined(__MSDOS__) && !defined(MSDOS)
+# define MSDOS
+#endif
+#if (defined(OS_2) || defined(__OS2__)) && !defined(OS2)
+# define OS2
+#endif
+#if defined(_WINDOWS) && !defined(WINDOWS)
+# define WINDOWS
+#endif
+#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
+# define WIN32
+#endif
+#if (defined(MSDOS) || defined(OS2) || defined(WINDOWS)) && !defined(WIN32)
+# if !defined(__GNUC__) && !defined(__FLAT__) && !defined(__386__)
+# ifndef SYS16BIT
+# define SYS16BIT
+# endif
+# endif
+#endif
+
+/*
+ * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
+ * than 64k bytes at a time (needed on systems with 16-bit int).
+ */
+#ifdef SYS16BIT
+# define MAXSEG_64K
+#endif
+#ifdef MSDOS
+# define UNALIGNED_OK
+#endif
+
+#ifdef __STDC_VERSION__
+# ifndef STDC
+# define STDC
+# endif
+# if __STDC_VERSION__ >= 199901L
+# ifndef STDC99
+# define STDC99
+# endif
+# endif
+#endif
+#if !defined(STDC) && (defined(__STDC__) || defined(__cplusplus))
+# define STDC
+#endif
+#if !defined(STDC) && (defined(__GNUC__) || defined(__BORLANDC__))
+# define STDC
+#endif
+#if !defined(STDC) && (defined(MSDOS) || defined(WINDOWS) || defined(WIN32))
+# define STDC
+#endif
+#if !defined(STDC) && (defined(OS2) || defined(__HOS_AIX__))
+# define STDC
+#endif
+
+#if defined(__OS400__) && !defined(STDC) /* iSeries (formerly AS/400). */
+# define STDC
+#endif
+
+#ifndef STDC
+# ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
+# define const /* note: need a more gentle solution here */
+# endif
+#endif
+
+/* Some Mac compilers merge all .h files incorrectly: */
+#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
+# define NO_DUMMY_DECL
+#endif
+
+/* Maximum value for memLevel in deflateInit2 */
+#ifndef MAX_MEM_LEVEL
+# ifdef MAXSEG_64K
+# define MAX_MEM_LEVEL 8
+# else
+# define MAX_MEM_LEVEL 9
+# endif
+#endif
+
+/* Maximum value for windowBits in deflateInit2 and inflateInit2.
+ * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
+ * created by gzip. (Files created by minigzip can still be extracted by
+ * gzip.)
+ */
+#ifndef MAX_WBITS
+# define MAX_WBITS 15 /* 32K LZ77 window */
+#endif
+
+/* The memory requirements for deflate are (in bytes):
+ (1 << (windowBits+2)) + (1 << (memLevel+9))
+ that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
+ plus a few kilobytes for small objects. For example, if you want to reduce
+ the default memory requirements from 256K to 128K, compile with
+ make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
+ Of course this will generally degrade compression (there's no free lunch).
+
+ The memory requirements for inflate are (in bytes) 1 << windowBits
+ that is, 32K for windowBits=15 (default value) plus a few kilobytes
+ for small objects.
+*/
+
+ /* Type declarations */
+#define OF(args) args
+#ifndef OF /* function prototypes */
+# ifdef STDC
+# define OF(args) args
+# else
+# define OF(args) ()
+# endif
+#endif
+
+/* The following definitions for FAR are needed only for MSDOS mixed
+ * model programming (small or medium model with some far allocations).
+ * This was tested only with MSC; for other MSDOS compilers you may have
+ * to define NO_MEMCPY in zutil.h. If you don't need the mixed model,
+ * just define FAR to be empty.
+ */
+#ifdef SYS16BIT
+# if defined(M_I86SM) || defined(M_I86MM)
+ /* MSC small or medium model */
+# define SMALL_MEDIUM
+# ifdef _MSC_VER
+# define FAR _far
+# else
+# define FAR far
+# endif
+# endif
+# if (defined(__SMALL__) || defined(__MEDIUM__))
+ /* Turbo C small or medium model */
+# define SMALL_MEDIUM
+# ifdef __BORLANDC__
+# define FAR _far
+# else
+# define FAR far
+# endif
+# endif
+#endif
+
+#if defined(WINDOWS) || defined(WIN32)
+ /* If building or using zlib as a DLL, define ZLIB_DLL.
+ * This is not mandatory, but it offers a little performance increase.
+ */
+# ifdef ZLIB_DLL
+# if defined(WIN32) && (!defined(__BORLANDC__) || (__BORLANDC__ >= 0x500))
+# ifdef ZLIB_INTERNAL
+# define ZEXTERN extern __declspec(dllexport)
+# else
+# define ZEXTERN extern __declspec(dllimport)
+# endif
+# endif
+# endif /* ZLIB_DLL */
+ /* If building or using zlib with the WINAPI/WINAPIV calling convention,
+ * define ZLIB_WINAPI.
+ * Caution: the standard ZLIB1.DLL is NOT compiled using ZLIB_WINAPI.
+ */
+# ifdef ZLIB_WINAPI
+# ifdef FAR
+# undef FAR
+# endif
+# include <windows.h>
+ /* No need for _export, use ZLIB.DEF instead. */
+ /* For complete Windows compatibility, use WINAPI, not __stdcall. */
+# define ZEXPORT WINAPI
+# ifdef WIN32
+# define ZEXPORTVA WINAPIV
+# else
+# define ZEXPORTVA FAR CDECL
+# endif
+# endif
+#endif
+
+#if defined (__BEOS__)
+# ifdef ZLIB_DLL
+# ifdef ZLIB_INTERNAL
+# define ZEXPORT __declspec(dllexport)
+# define ZEXPORTVA __declspec(dllexport)
+# else
+# define ZEXPORT __declspec(dllimport)
+# define ZEXPORTVA __declspec(dllimport)
+# endif
+# endif
+#endif
+
+#define ZEXTERN
+#ifndef ZEXTERN
+# define ZEXTERN extern
+#endif
+#ifndef ZEXPORT
+# define ZEXPORT
+#endif
+#ifndef ZEXPORTVA
+# define ZEXPORTVA
+#endif
+
+#ifndef FAR
+# define FAR
+#endif
+
+#if !defined(__MACTYPES__)
+typedef unsigned char Byte; /* 8 bits */
+#endif
+typedef unsigned int uInt; /* 16 bits or more */
+typedef unsigned long uLong; /* 32 bits or more */
+
+#ifdef SMALL_MEDIUM
+ /* Borland C/C++ and some old MSC versions ignore FAR inside typedef */
+# define Bytef Byte FAR
+#else
+ typedef Byte FAR Bytef;
+#endif
+typedef char FAR charf;
+typedef int FAR intf;
+typedef uInt FAR uIntf;
+typedef uLong FAR uLongf;
+
+#ifdef STDC
+ typedef void const *voidpc;
+ typedef void FAR *voidpf;
+ typedef void *voidp;
+#else
+ typedef Byte const *voidpc;
+ typedef Byte FAR *voidpf;
+ typedef Byte *voidp;
+#endif
+
+#if 0 /* HAVE_UNISTD_H -- this line is updated by ./configure */
+# include <sys/types.h> /* for off_t */
+# include <unistd.h> /* for SEEK_* and off_t */
+# ifdef VMS
+# include <unixio.h> /* for off_t */
+# endif
+# define z_off_t off_t
+#endif
+#ifndef SEEK_SET
+# define SEEK_SET 0 /* Seek from beginning of file. */
+# define SEEK_CUR 1 /* Seek from current position. */
+# define SEEK_END 2 /* Set file pointer to EOF plus "offset" */
+#endif
+#ifndef z_off_t
+# define z_off_t long
+#endif
+
+#if defined(__OS400__)
+# define NO_vsnprintf
+#endif
+
+#if defined(__MVS__)
+# define NO_vsnprintf
+# ifdef FAR
+# undef FAR
+# endif
+#endif
+
+/* MVS linker does not support external names larger than 8 bytes */
+#if defined(__MVS__)
+# pragma map(deflateInit_,"DEIN")
+# pragma map(deflateInit2_,"DEIN2")
+# pragma map(deflateEnd,"DEEND")
+# pragma map(deflateBound,"DEBND")
+# pragma map(inflateInit_,"ININ")
+# pragma map(inflateInit2_,"ININ2")
+# pragma map(inflateEnd,"INEND")
+# pragma map(inflateSync,"INSY")
+# pragma map(inflateSetDictionary,"INSEDI")
+# pragma map(compressBound,"CMBND")
+# pragma map(inflate_table,"INTABL")
+# pragma map(inflate_fast,"INFA")
+# pragma map(inflate_copyright,"INCOPY")
+#endif
+
+#endif /* ZCONF_H */
--- /dev/null
+++ b/src/gfx/zlib/zconf.in.h
@@ -1,0 +1,326 @@
+/* zconf.h -- configuration of the zlib compression library
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id: zconf.in.h,v 1.1.1.1 2005/04/24 21:39:37 giles Exp $ */
+
+#ifndef ZCONF_H
+#define ZCONF_H
+
+/*
+ * If you *really* need a unique prefix for all types and library functions,
+ * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
+ */
+#ifdef Z_PREFIX
+# define deflateInit_ z_deflateInit_
+# define deflate z_deflate
+# define deflateEnd z_deflateEnd
+# define inflateInit_ z_inflateInit_
+# define inflate z_inflate
+# define inflateEnd z_inflateEnd
+# define deflateInit2_ z_deflateInit2_
+# define deflateSetDictionary z_deflateSetDictionary
+# define deflateCopy z_deflateCopy
+# define deflateReset z_deflateReset
+# define deflateParams z_deflateParams
+# define deflateBound z_deflateBound
+# define deflatePrime z_deflatePrime
+# define inflateInit2_ z_inflateInit2_
+# define inflateSetDictionary z_inflateSetDictionary
+# define inflateSync z_inflateSync
+# define inflateSyncPoint z_inflateSyncPoint
+# define inflateCopy z_inflateCopy
+# define inflateReset z_inflateReset
+# define inflateBack z_inflateBack
+# define inflateBackEnd z_inflateBackEnd
+# define compress z_compress
+# define compress2 z_compress2
+# define compressBound z_compressBound
+# define uncompress z_uncompress
+# define adler32 z_adler32
+# define crc32 z_crc32
+# define get_crc_table z_get_crc_table
+# define zError z_zError
+
+# define Byte z_Byte
+# define uInt z_uInt
+# define uLong z_uLong
+# define Bytef z_Bytef
+# define charf z_charf
+# define intf z_intf
+# define uIntf z_uIntf
+# define uLongf z_uLongf
+# define voidpf z_voidpf
+# define voidp z_voidp
+#endif
+
+#if defined(__MSDOS__) && !defined(MSDOS)
+# define MSDOS
+#endif
+#if (defined(OS_2) || defined(__OS2__)) && !defined(OS2)
+# define OS2
+#endif
+#if defined(_WINDOWS) && !defined(WINDOWS)
+# define WINDOWS
+#endif
+#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
+# define WIN32
+#endif
+#if (defined(MSDOS) || defined(OS2) || defined(WINDOWS)) && !defined(WIN32)
+# if !defined(__GNUC__) && !defined(__FLAT__) && !defined(__386__)
+# ifndef SYS16BIT
+# define SYS16BIT
+# endif
+# endif
+#endif
+
+/*
+ * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
+ * than 64k bytes at a time (needed on systems with 16-bit int).
+ */
+#ifdef SYS16BIT
+# define MAXSEG_64K
+#endif
+#ifdef MSDOS
+# define UNALIGNED_OK
+#endif
+
+#ifdef __STDC_VERSION__
+# ifndef STDC
+# define STDC
+# endif
+# if __STDC_VERSION__ >= 199901L
+# ifndef STDC99
+# define STDC99
+# endif
+# endif
+#endif
+#if !defined(STDC) && (defined(__STDC__) || defined(__cplusplus))
+# define STDC
+#endif
+#if !defined(STDC) && (defined(__GNUC__) || defined(__BORLANDC__))
+# define STDC
+#endif
+#if !defined(STDC) && (defined(MSDOS) || defined(WINDOWS) || defined(WIN32))
+# define STDC
+#endif
+#if !defined(STDC) && (defined(OS2) || defined(__HOS_AIX__))
+# define STDC
+#endif
+
+#if defined(__OS400__) && !defined(STDC) /* iSeries (formerly AS/400). */
+# define STDC
+#endif
+
+#ifndef STDC
+# ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
+# define const /* note: need a more gentle solution here */
+# endif
+#endif
+
+/* Some Mac compilers merge all .h files incorrectly: */
+#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
+# define NO_DUMMY_DECL
+#endif
+
+/* Maximum value for memLevel in deflateInit2 */
+#ifndef MAX_MEM_LEVEL
+# ifdef MAXSEG_64K
+# define MAX_MEM_LEVEL 8
+# else
+# define MAX_MEM_LEVEL 9
+# endif
+#endif
+
+/* Maximum value for windowBits in deflateInit2 and inflateInit2.
+ * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
+ * created by gzip. (Files created by minigzip can still be extracted by
+ * gzip.)
+ */
+#ifndef MAX_WBITS
+# define MAX_WBITS 15 /* 32K LZ77 window */
+#endif
+
+/* The memory requirements for deflate are (in bytes):
+ (1 << (windowBits+2)) + (1 << (memLevel+9))
+ that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
+ plus a few kilobytes for small objects. For example, if you want to reduce
+ the default memory requirements from 256K to 128K, compile with
+ make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
+ Of course this will generally degrade compression (there's no free lunch).
+
+ The memory requirements for inflate are (in bytes) 1 << windowBits
+ that is, 32K for windowBits=15 (default value) plus a few kilobytes
+ for small objects.
+*/
+
+ /* Type declarations */
+
+#ifndef OF /* function prototypes */
+# ifdef STDC
+# define OF(args) args
+# else
+# define OF(args) ()
+# endif
+#endif
+
+/* The following definitions for FAR are needed only for MSDOS mixed
+ * model programming (small or medium model with some far allocations).
+ * This was tested only with MSC; for other MSDOS compilers you may have
+ * to define NO_MEMCPY in zutil.h. If you don't need the mixed model,
+ * just define FAR to be empty.
+ */
+#ifdef SYS16BIT
+# if defined(M_I86SM) || defined(M_I86MM)
+ /* MSC small or medium model */
+# define SMALL_MEDIUM
+# ifdef _MSC_VER
+# define FAR _far
+# else
+# define FAR far
+# endif
+# endif
+# if (defined(__SMALL__) || defined(__MEDIUM__))
+ /* Turbo C small or medium model */
+# define SMALL_MEDIUM
+# ifdef __BORLANDC__
+# define FAR _far
+# else
+# define FAR far
+# endif
+# endif
+#endif
+
+#if defined(WINDOWS) || defined(WIN32)
+ /* If building or using zlib as a DLL, define ZLIB_DLL.
+ * This is not mandatory, but it offers a little performance increase.
+ */
+# ifdef ZLIB_DLL
+# if defined(WIN32) && (!defined(__BORLANDC__) || (__BORLANDC__ >= 0x500))
+# ifdef ZLIB_INTERNAL
+# define ZEXTERN extern __declspec(dllexport)
+# else
+# define ZEXTERN extern __declspec(dllimport)
+# endif
+# endif
+# endif /* ZLIB_DLL */
+ /* If building or using zlib with the WINAPI/WINAPIV calling convention,
+ * define ZLIB_WINAPI.
+ * Caution: the standard ZLIB1.DLL is NOT compiled using ZLIB_WINAPI.
+ */
+# ifdef ZLIB_WINAPI
+# ifdef FAR
+# undef FAR
+# endif
+# include <windows.h>
+ /* No need for _export, use ZLIB.DEF instead. */
+ /* For complete Windows compatibility, use WINAPI, not __stdcall. */
+# define ZEXPORT WINAPI
+# ifdef WIN32
+# define ZEXPORTVA WINAPIV
+# else
+# define ZEXPORTVA FAR CDECL
+# endif
+# endif
+#endif
+
+#if defined (__BEOS__)
+# ifdef ZLIB_DLL
+# ifdef ZLIB_INTERNAL
+# define ZEXPORT __declspec(dllexport)
+# define ZEXPORTVA __declspec(dllexport)
+# else
+# define ZEXPORT __declspec(dllimport)
+# define ZEXPORTVA __declspec(dllimport)
+# endif
+# endif
+#endif
+
+#ifndef ZEXTERN
+# define ZEXTERN extern
+#endif
+#ifndef ZEXPORT
+# define ZEXPORT
+#endif
+#ifndef ZEXPORTVA
+# define ZEXPORTVA
+#endif
+
+#ifndef FAR
+# define FAR
+#endif
+
+#if !defined(__MACTYPES__)
+typedef unsigned char Byte; /* 8 bits */
+#endif
+typedef unsigned int uInt; /* 16 bits or more */
+typedef unsigned long uLong; /* 32 bits or more */
+
+#ifdef SMALL_MEDIUM
+ /* Borland C/C++ and some old MSC versions ignore FAR inside typedef */
+# define Bytef Byte FAR
+#else
+ typedef Byte FAR Bytef;
+#endif
+typedef char FAR charf;
+typedef int FAR intf;
+typedef uInt FAR uIntf;
+typedef uLong FAR uLongf;
+
+#ifdef STDC
+ typedef void const *voidpc;
+ typedef void FAR *voidpf;
+ typedef void *voidp;
+#else
+ typedef Byte const *voidpc;
+ typedef Byte FAR *voidpf;
+ typedef Byte *voidp;
+#endif
+
+#if 0 /* HAVE_UNISTD_H -- this line is updated by ./configure */
+# include <sys/types.h> /* for off_t */
+# include <unistd.h> /* for SEEK_* and off_t */
+# ifdef VMS
+# include <unixio.h> /* for off_t */
+# endif
+# define z_off_t off_t
+#endif
+#ifndef SEEK_SET
+# define SEEK_SET 0 /* Seek from beginning of file. */
+# define SEEK_CUR 1 /* Seek from current position. */
+# define SEEK_END 2 /* Set file pointer to EOF plus "offset" */
+#endif
+#ifndef z_off_t
+# define z_off_t long
+#endif
+
+#if defined(__OS400__)
+# define NO_vsnprintf
+#endif
+
+#if defined(__MVS__)
+# define NO_vsnprintf
+# ifdef FAR
+# undef FAR
+# endif
+#endif
+
+/* MVS linker does not support external names larger than 8 bytes */
+#if defined(__MVS__)
+# pragma map(deflateInit_,"DEIN")
+# pragma map(deflateInit2_,"DEIN2")
+# pragma map(deflateEnd,"DEEND")
+# pragma map(deflateBound,"DEBND")
+# pragma map(inflateInit_,"ININ")
+# pragma map(inflateInit2_,"ININ2")
+# pragma map(inflateEnd,"INEND")
+# pragma map(inflateSync,"INSY")
+# pragma map(inflateSetDictionary,"INSEDI")
+# pragma map(compressBound,"CMBND")
+# pragma map(inflate_table,"INTABL")
+# pragma map(inflate_fast,"INFA")
+# pragma map(inflate_copyright,"INCOPY")
+#endif
+
+#endif /* ZCONF_H */
--- /dev/null
+++ b/src/gfx/zlib/zlib.3.man
@@ -1,0 +1,159 @@
+.TH ZLIB 3 "3 October 2004"
+.SH NAME
+zlib \- compression/decompression library
+.SH SYNOPSIS
+[see
+.I zlib.h
+for full description]
+.SH DESCRIPTION
+The
+.I zlib
+library is a general purpose data compression library.
+The code is thread safe.
+It provides in-memory compression and decompression functions,
+including integrity checks of the uncompressed data.
+This version of the library supports only one compression method (deflation)
+but other algorithms will be added later
+and will have the same stream interface.
+.LP
+Compression can be done in a single step if the buffers are large enough
+(for example if an input file is mmap'ed),
+or can be done by repeated calls of the compression function.
+In the latter case,
+the application must provide more input and/or consume the output
+(providing more output space) before each call.
+.LP
+The library also supports reading and writing files in
+.IR gzip (1)
+(.gz) format
+with an interface similar to that of stdio.
+.LP
+The library does not install any signal handler.
+The decoder checks the consistency of the compressed data,
+so the library should never crash even in case of corrupted input.
+.LP
+All functions of the compression library are documented in the file
+.IR zlib.h .
+The distribution source includes examples of use of the library
+in the files
+.I example.c
+and
+.IR minigzip.c .
+.LP
+Changes to this version are documented in the file
+.I ChangeLog
+that accompanies the source,
+and are concerned primarily with bug fixes and portability enhancements.
+.LP
+A Java implementation of
+.I zlib
+is available in the Java Development Kit 1.1:
+.IP
+http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
+.LP
+A Perl interface to
+.IR zlib ,
+written by Paul Marquess (pmqs@cpan.org),
+is available at CPAN (Comprehensive Perl Archive Network) sites,
+including:
+.IP
+http://www.cpan.org/modules/by-module/Compress/
+.LP
+A Python interface to
+.IR zlib ,
+written by A.M. Kuchling (amk@magnet.com),
+is available in Python 1.5 and later versions:
+.IP
+http://www.python.org/doc/lib/module-zlib.html
+.LP
+A
+.I zlib
+binding for
+.IR tcl (1),
+written by Andreas Kupries (a.kupries@westend.com),
+is availlable at:
+.IP
+http://www.westend.com/~kupries/doc/trf/man/man.html
+.LP
+An experimental package to read and write files in .zip format,
+written on top of
+.I zlib
+by Gilles Vollant (info@winimage.com),
+is available at:
+.IP
+http://www.winimage.com/zLibDll/unzip.html
+and also in the
+.I contrib/minizip
+directory of the main
+.I zlib
+web site.
+.SH "SEE ALSO"
+The
+.I zlib
+web site can be found at either of these locations:
+.IP
+http://www.zlib.org
+.br
+http://www.gzip.org/zlib/
+.LP
+The data format used by the zlib library is described by RFC
+(Request for Comments) 1950 to 1952 in the files:
+.IP
+http://www.ietf.org/rfc/rfc1950.txt (concerning zlib format)
+.br
+http://www.ietf.org/rfc/rfc1951.txt (concerning deflate format)
+.br
+http://www.ietf.org/rfc/rfc1952.txt (concerning gzip format)
+.LP
+These documents are also available in other formats from:
+.IP
+ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
+.LP
+Mark Nelson (markn@ieee.org) wrote an article about
+.I zlib
+for the Jan. 1997 issue of Dr. Dobb's Journal;
+a copy of the article is available at:
+.IP
+http://dogma.net/markn/articles/zlibtool/zlibtool.htm
+.SH "REPORTING PROBLEMS"
+Before reporting a problem,
+please check the
+.I zlib
+web site to verify that you have the latest version of
+.IR zlib ;
+otherwise,
+obtain the latest version and see if the problem still exists.
+Please read the
+.I zlib
+FAQ at:
+.IP
+http://www.gzip.org/zlib/zlib_faq.html
+.LP
+before asking for help.
+Send questions and/or comments to zlib@gzip.org,
+or (for the Windows DLL version) to Gilles Vollant (info@winimage.com).
+.SH AUTHORS
+Version 1.2.2
+Copyright (C) 1995-2004 Jean-loup Gailly (jloup@gzip.org)
+and Mark Adler (madler@alumni.caltech.edu).
+.LP
+This software is provided "as-is,"
+without any express or implied warranty.
+In no event will the authors be held liable for any damages
+arising from the use of this software.
+See the distribution directory with respect to requirements
+governing redistribution.
+The deflate format used by
+.I zlib
+was defined by Phil Katz.
+The deflate and
+.I zlib
+specifications were written by L. Peter Deutsch.
+Thanks to all the people who reported problems and suggested various
+improvements in
+.IR zlib ;
+who are too numerous to cite here.
+.LP
+UNIX manual page by R. P. C. Rodgers,
+U.S. National Library of Medicine (rodgers@nlm.nih.gov).
+.\" end of man page
--- /dev/null
+++ b/src/gfx/zlib/zlib.h
@@ -1,0 +1,1202 @@
+/* zlib.h -- interface of the 'zlib' general purpose compression library
+ version 1.2.2, October 3rd, 2004
+
+ Copyright (C) 1995-2004 Jean-loup Gailly and Mark Adler
+
+ This software is provided 'as-is', without any express or implied
+ warranty. In no event will the authors be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+
+ Jean-loup Gailly Mark Adler
+ jloup@gzip.org madler@alumni.caltech.edu
+
+
+ The data format used by the zlib library is described by RFCs (Request for
+ Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt
+ (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
+*/
+
+#ifndef ZLIB_H
+#define ZLIB_H
+
+#include "zconf.h"
+
+#ifdef __cplusplus
+extern "C" {+#endif
+
+#define ZLIB_VERSION "1.2.2"
+#define ZLIB_VERNUM 0x1220
+
+/*
+ The 'zlib' compression library provides in-memory compression and
+ decompression functions, including integrity checks of the uncompressed
+ data. This version of the library supports only one compression method
+ (deflation) but other algorithms will be added later and will have the same
+ stream interface.
+
+ Compression can be done in a single step if the buffers are large
+ enough (for example if an input file is mmap'ed), or can be done by
+ repeated calls of the compression function. In the latter case, the
+ application must provide more input and/or consume the output
+ (providing more output space) before each call.
+
+ The compressed data format used by default by the in-memory functions is
+ the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
+ around a deflate stream, which is itself documented in RFC 1951.
+
+ The library also supports reading and writing files in gzip (.gz) format
+ with an interface similar to that of stdio using the functions that start
+ with "gz". The gzip format is different from the zlib format. gzip is a
+ gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
+
+ This library can optionally read and write gzip streams in memory as well.
+
+ The zlib format was designed to be compact and fast for use in memory
+ and on communications channels. The gzip format was designed for single-
+ file compression on file systems, has a larger header than zlib to maintain
+ directory information, and uses a different, slower check method than zlib.
+
+ The library does not install any signal handler. The decoder checks
+ the consistency of the compressed data, so the library should never
+ crash even in case of corrupted input.
+*/
+
+typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
+typedef void (*free_func) OF((voidpf opaque, voidpf address));
+
+struct internal_state;
+
+typedef struct z_stream_s {+ Bytef *next_in; /* next input byte */
+ uInt avail_in; /* number of bytes available at next_in */
+ uLong total_in; /* total nb of input bytes read so far */
+
+ Bytef *next_out; /* next output byte should be put there */
+ uInt avail_out; /* remaining free space at next_out */
+ uLong total_out; /* total nb of bytes output so far */
+
+ char *msg; /* last error message, NULL if no error */
+ struct internal_state FAR *state; /* not visible by applications */
+
+ alloc_func zalloc; /* used to allocate the internal state */
+ free_func zfree; /* used to free the internal state */
+ voidpf opaque; /* private data object passed to zalloc and zfree */
+
+ int data_type; /* best guess about the data type: ascii or binary */
+ uLong adler; /* adler32 value of the uncompressed data */
+ uLong reserved; /* reserved for future use */
+} z_stream;
+
+#pragma incomplete z_stream;
+
+typedef z_stream FAR *z_streamp;
+
+/*
+ The application must update next_in and avail_in when avail_in has
+ dropped to zero. It must update next_out and avail_out when avail_out
+ has dropped to zero. The application must initialize zalloc, zfree and
+ opaque before calling the init function. All other fields are set by the
+ compression library and must not be updated by the application.
+
+ The opaque value provided by the application will be passed as the first
+ parameter for calls of zalloc and zfree. This can be useful for custom
+ memory management. The compression library attaches no meaning to the
+ opaque value.
+
+ zalloc must return Z_NULL if there is not enough memory for the object.
+ If zlib is used in a multi-threaded application, zalloc and zfree must be
+ thread safe.
+
+ On 16-bit systems, the functions zalloc and zfree must be able to allocate
+ exactly 65536 bytes, but will not be required to allocate more than this
+ if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
+ pointers returned by zalloc for objects of exactly 65536 bytes *must*
+ have their offset normalized to zero. The default allocation function
+ provided by this library ensures this (see zutil.c). To reduce memory
+ requirements and avoid any allocation of 64K objects, at the expense of
+ compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
+
+ The fields total_in and total_out can be used for statistics or
+ progress reports. After compression, total_in holds the total size of
+ the uncompressed data and may be saved for use in the decompressor
+ (particularly if the decompressor wants to decompress everything in
+ a single step).
+*/
+
+ /* constants */
+
+#define Z_NO_FLUSH 0
+#define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */
+#define Z_SYNC_FLUSH 2
+#define Z_FULL_FLUSH 3
+#define Z_FINISH 4
+#define Z_BLOCK 5
+/* Allowed flush values; see deflate() and inflate() below for details */
+
+#define Z_OK 0
+#define Z_STREAM_END 1
+#define Z_NEED_DICT 2
+#define Z_ERRNO (-1)
+#define Z_STREAM_ERROR (-2)
+#define Z_DATA_ERROR (-3)
+#define Z_MEM_ERROR (-4)
+#define Z_BUF_ERROR (-5)
+#define Z_VERSION_ERROR (-6)
+/* Return codes for the compression/decompression functions. Negative
+ * values are errors, positive values are used for special but normal events.
+ */
+
+#define Z_NO_COMPRESSION 0
+#define Z_BEST_SPEED 1
+#define Z_BEST_COMPRESSION 9
+#define Z_DEFAULT_COMPRESSION (-1)
+/* compression levels */
+
+#define Z_FILTERED 1
+#define Z_HUFFMAN_ONLY 2
+#define Z_RLE 3
+#define Z_DEFAULT_STRATEGY 0
+/* compression strategy; see deflateInit2() below for details */
+
+#define Z_BINARY 0
+#define Z_ASCII 1
+#define Z_UNKNOWN 2
+/* Possible values of the data_type field (though see inflate()) */
+
+#define Z_DEFLATED 8
+/* The deflate compression method (the only one supported in this version) */
+
+#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */
+
+#define zlib_version zlibVersion()
+/* for compatibility with versions < 1.0.2 */
+
+ /* basic functions */
+
+ZEXTERN const char * ZEXPORT zlibVersion OF((void));
+/* The application can compare zlibVersion and ZLIB_VERSION for consistency.
+ If the first character differs, the library code actually used is
+ not compatible with the zlib.h header file used by the application.
+ This check is automatically made by deflateInit and inflateInit.
+ */
+
+/*
+ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));
+
+ Initializes the internal stream state for compression. The fields
+ zalloc, zfree and opaque must be initialized before by the caller.
+ If zalloc and zfree are set to Z_NULL, deflateInit updates them to
+ use default allocation functions.
+
+ The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9:
+ 1 gives best speed, 9 gives best compression, 0 gives no compression at
+ all (the input data is simply copied a block at a time).
+ Z_DEFAULT_COMPRESSION requests a default compromise between speed and
+ compression (currently equivalent to level 6).
+
+ deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_STREAM_ERROR if level is not a valid compression level,
+ Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible
+ with the version assumed by the caller (ZLIB_VERSION).
+ msg is set to null if there is no error message. deflateInit does not
+ perform any compression: this will be done by deflate().
+*/
+
+
+ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
+/*
+ deflate compresses as much data as possible, and stops when the input
+ buffer becomes empty or the output buffer becomes full. It may introduce some
+ output latency (reading input without producing any output) except when
+ forced to flush.
+
+ The detailed semantics are as follows. deflate performs one or both of the
+ following actions:
+
+ - Compress more input starting at next_in and update next_in and avail_in
+ accordingly. If not all input can be processed (because there is not
+ enough room in the output buffer), next_in and avail_in are updated and
+ processing will resume at this point for the next call of deflate().
+
+ - Provide more output starting at next_out and update next_out and avail_out
+ accordingly. This action is forced if the parameter flush is non zero.
+ Forcing flush frequently degrades the compression ratio, so this parameter
+ should be set only when necessary (in interactive applications).
+ Some output may be provided even if flush is not set.
+
+ Before the call of deflate(), the application should ensure that at least
+ one of the actions is possible, by providing more input and/or consuming
+ more output, and updating avail_in or avail_out accordingly; avail_out
+ should never be zero before the call. The application can consume the
+ compressed output when it wants, for example when the output buffer is full
+ (avail_out == 0), or after each call of deflate(). If deflate returns Z_OK
+ and with zero avail_out, it must be called again after making room in the
+ output buffer because there might be more output pending.
+
+ If the parameter flush is set to Z_SYNC_FLUSH, all pending output is
+ flushed to the output buffer and the output is aligned on a byte boundary, so
+ that the decompressor can get all input data available so far. (In particular
+ avail_in is zero after the call if enough output space has been provided
+ before the call.) Flushing may degrade compression for some compression
+ algorithms and so it should be used only when necessary.
+
+ If flush is set to Z_FULL_FLUSH, all output is flushed as with
+ Z_SYNC_FLUSH, and the compression state is reset so that decompression can
+ restart from this point if previous compressed data has been damaged or if
+ random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
+ the compression.
+
+ If deflate returns with avail_out == 0, this function must be called again
+ with the same value of the flush parameter and more output space (updated
+ avail_out), until the flush is complete (deflate returns with non-zero
+ avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that
+ avail_out is greater than six to avoid repeated flush markers due to
+ avail_out == 0 on return.
+
+ If the parameter flush is set to Z_FINISH, pending input is processed,
+ pending output is flushed and deflate returns with Z_STREAM_END if there
+ was enough output space; if deflate returns with Z_OK, this function must be
+ called again with Z_FINISH and more output space (updated avail_out) but no
+ more input data, until it returns with Z_STREAM_END or an error. After
+ deflate has returned Z_STREAM_END, the only possible operations on the
+ stream are deflateReset or deflateEnd.
+
+ Z_FINISH can be used immediately after deflateInit if all the compression
+ is to be done in a single step. In this case, avail_out must be at least
+ the value returned by deflateBound (see below). If deflate does not return
+ Z_STREAM_END, then it must be called again as described above.
+
+ deflate() sets strm->adler to the adler32 checksum of all input read
+ so far (that is, total_in bytes).
+
+ deflate() may update data_type if it can make a good guess about
+ the input data type (Z_ASCII or Z_BINARY). In doubt, the data is considered
+ binary. This field is only for information purposes and does not affect
+ the compression algorithm in any manner.
+
+ deflate() returns Z_OK if some progress has been made (more input
+ processed or more output produced), Z_STREAM_END if all input has been
+ consumed and all output has been produced (only when flush is set to
+ Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
+ if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible
+ (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not
+ fatal, and deflate() can be called again with more input and more output
+ space to continue compressing.
+*/
+
+
+ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
+/*
+ All dynamically allocated data structures for this stream are freed.
+ This function discards any unprocessed input and does not flush any
+ pending output.
+
+ deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the
+ stream state was inconsistent, Z_DATA_ERROR if the stream was freed
+ prematurely (some input or output was discarded). In the error case,
+ msg may be set but then points to a static string (which must not be
+ deallocated).
+*/
+
+
+/*
+ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
+
+ Initializes the internal stream state for decompression. The fields
+ next_in, avail_in, zalloc, zfree and opaque must be initialized before by
+ the caller. If next_in is not Z_NULL and avail_in is large enough (the exact
+ value depends on the compression method), inflateInit determines the
+ compression method from the zlib header and allocates all data structures
+ accordingly; otherwise the allocation will be deferred to the first call of
+ inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to
+ use default allocation functions.
+
+ inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
+ memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
+ version assumed by the caller. msg is set to null if there is no error
+ message. inflateInit does not perform any decompression apart from reading
+ the zlib header if present: this will be done by inflate(). (So next_in and
+ avail_in may be modified, but next_out and avail_out are unchanged.)
+*/
+
+
+ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
+/*
+ inflate decompresses as much data as possible, and stops when the input
+ buffer becomes empty or the output buffer becomes full. It may introduce
+ some output latency (reading input without producing any output) except when
+ forced to flush.
+
+ The detailed semantics are as follows. inflate performs one or both of the
+ following actions:
+
+ - Decompress more input starting at next_in and update next_in and avail_in
+ accordingly. If not all input can be processed (because there is not
+ enough room in the output buffer), next_in is updated and processing
+ will resume at this point for the next call of inflate().
+
+ - Provide more output starting at next_out and update next_out and avail_out
+ accordingly. inflate() provides as much output as possible, until there
+ is no more input data or no more space in the output buffer (see below
+ about the flush parameter).
+
+ Before the call of inflate(), the application should ensure that at least
+ one of the actions is possible, by providing more input and/or consuming
+ more output, and updating the next_* and avail_* values accordingly.
+ The application can consume the uncompressed output when it wants, for
+ example when the output buffer is full (avail_out == 0), or after each
+ call of inflate(). If inflate returns Z_OK and with zero avail_out, it
+ must be called again after making room in the output buffer because there
+ might be more output pending.
+
+ The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH,
+ Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much
+ output as possible to the output buffer. Z_BLOCK requests that inflate() stop
+ if and when it get to the next deflate block boundary. When decoding the zlib
+ or gzip format, this will cause inflate() to return immediately after the
+ header and before the first block. When doing a raw inflate, inflate() will
+ go ahead and process the first block, and will return when it gets to the end
+ of that block, or when it runs out of data.
+
+ The Z_BLOCK option assists in appending to or combining deflate streams.
+ Also to assist in this, on return inflate() will set strm->data_type to the
+ number of unused bits in the last byte taken from strm->next_in, plus 64
+ if inflate() is currently decoding the last block in the deflate stream,
+ plus 128 if inflate() returned immediately after decoding an end-of-block
+ code or decoding the complete header up to just before the first byte of the
+ deflate stream. The end-of-block will not be indicated until all of the
+ uncompressed data from that block has been written to strm->next_out. The
+ number of unused bits may in general be greater than seven, except when
+ bit 7 of data_type is set, in which case the number of unused bits will be
+ less than eight.
+
+ inflate() should normally be called until it returns Z_STREAM_END or an
+ error. However if all decompression is to be performed in a single step
+ (a single call of inflate), the parameter flush should be set to
+ Z_FINISH. In this case all pending input is processed and all pending
+ output is flushed; avail_out must be large enough to hold all the
+ uncompressed data. (The size of the uncompressed data may have been saved
+ by the compressor for this purpose.) The next operation on this stream must
+ be inflateEnd to deallocate the decompression state. The use of Z_FINISH
+ is never required, but can be used to inform inflate that a faster approach
+ may be used for the single inflate() call.
+
+ In this implementation, inflate() always flushes as much output as
+ possible to the output buffer, and always uses the faster approach on the
+ first call. So the only effect of the flush parameter in this implementation
+ is on the return value of inflate(), as noted below, or when it returns early
+ because Z_BLOCK is used.
+
+ If a preset dictionary is needed after this call (see inflateSetDictionary
+ below), inflate sets strm->adler to the adler32 checksum of the dictionary
+ chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
+ strm->adler to the adler32 checksum of all output produced so far (that is,
+ total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
+ below. At the end of the stream, inflate() checks that its computed adler32
+ checksum is equal to that saved by the compressor and returns Z_STREAM_END
+ only if the checksum is correct.
+
+ inflate() will decompress and check either zlib-wrapped or gzip-wrapped
+ deflate data. The header type is detected automatically. Any information
+ contained in the gzip header is not retained, so applications that need that
+ information should instead use raw inflate, see inflateInit2() below, or
+ inflateBack() and perform their own processing of the gzip header and
+ trailer.
+
+ inflate() returns Z_OK if some progress has been made (more input processed
+ or more output produced), Z_STREAM_END if the end of the compressed data has
+ been reached and all uncompressed output has been produced, Z_NEED_DICT if a
+ preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
+ corrupted (input stream not conforming to the zlib format or incorrect check
+ value), Z_STREAM_ERROR if the stream structure was inconsistent (for example
+ if next_in or next_out was NULL), Z_MEM_ERROR if there was not enough memory,
+ Z_BUF_ERROR if no progress is possible or if there was not enough room in the
+ output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
+ inflate() can be called again with more input and more output space to
+ continue decompressing. If Z_DATA_ERROR is returned, the application may then
+ call inflateSync() to look for a good compression block if a partial recovery
+ of the data is desired.
+*/
+
+
+ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
+/*
+ All dynamically allocated data structures for this stream are freed.
+ This function discards any unprocessed input and does not flush any
+ pending output.
+
+ inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
+ was inconsistent. In the error case, msg may be set but then points to a
+ static string (which must not be deallocated).
+*/
+
+ /* Advanced functions */
+
+/*
+ The following functions are needed only in some special applications.
+*/
+
+/*
+ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
+ int level,
+ int method,
+ int windowBits,
+ int memLevel,
+ int strategy));
+
+ This is another version of deflateInit with more compression options. The
+ fields next_in, zalloc, zfree and opaque must be initialized before by
+ the caller.
+
+ The method parameter is the compression method. It must be Z_DEFLATED in
+ this version of the library.
+
+ The windowBits parameter is the base two logarithm of the window size
+ (the size of the history buffer). It should be in the range 8..15 for this
+ version of the library. Larger values of this parameter result in better
+ compression at the expense of memory usage. The default value is 15 if
+ deflateInit is used instead.
+
+ windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
+ determines the window size. deflate() will then generate raw deflate data
+ with no zlib header or trailer, and will not compute an adler32 check value.
+
+ windowBits can also be greater than 15 for optional gzip encoding. Add
+ 16 to windowBits to write a simple gzip header and trailer around the
+ compressed data instead of a zlib wrapper. The gzip header will have no
+ file name, no extra data, no comment, no modification time (set to zero),
+ no header crc, and the operating system will be set to 255 (unknown). If a
+ gzip stream is being written, strm->adler is a crc32 instead of an adler32.
+
+ The memLevel parameter specifies how much memory should be allocated
+ for the internal compression state. memLevel=1 uses minimum memory but
+ is slow and reduces compression ratio; memLevel=9 uses maximum memory
+ for optimal speed. The default value is 8. See zconf.h for total memory
+ usage as a function of windowBits and memLevel.
+
+ The strategy parameter is used to tune the compression algorithm. Use the
+ value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a
+ filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no
+ string match), or Z_RLE to limit match distances to one (run-length
+ encoding). Filtered data consists mostly of small values with a somewhat
+ random distribution. In this case, the compression algorithm is tuned to
+ compress them better. The effect of Z_FILTERED is to force more Huffman
+ coding and less string matching; it is somewhat intermediate between
+ Z_DEFAULT and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as fast as
+ Z_HUFFMAN_ONLY, but give better compression for PNG image data. The strategy
+ parameter only affects the compression ratio but not the correctness of the
+ compressed output even if it is not set appropriately.
+
+ deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+ memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid
+ method). msg is set to null if there is no error message. deflateInit2 does
+ not perform any compression: this will be done by deflate().
+*/
+
+ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
+ const Bytef *dictionary,
+ uInt dictLength));
+/*
+ Initializes the compression dictionary from the given byte sequence
+ without producing any compressed output. This function must be called
+ immediately after deflateInit, deflateInit2 or deflateReset, before any
+ call of deflate. The compressor and decompressor must use exactly the same
+ dictionary (see inflateSetDictionary).
+
+ The dictionary should consist of strings (byte sequences) that are likely
+ to be encountered later in the data to be compressed, with the most commonly
+ used strings preferably put towards the end of the dictionary. Using a
+ dictionary is most useful when the data to be compressed is short and can be
+ predicted with good accuracy; the data can then be compressed better than
+ with the default empty dictionary.
+
+ Depending on the size of the compression data structures selected by
+ deflateInit or deflateInit2, a part of the dictionary may in effect be
+ discarded, for example if the dictionary is larger than the window size in
+ deflate or deflate2. Thus the strings most likely to be useful should be
+ put at the end of the dictionary, not at the front.
+
+ Upon return of this function, strm->adler is set to the adler32 value
+ of the dictionary; the decompressor may later use this value to determine
+ which dictionary has been used by the compressor. (The adler32 value
+ applies to the whole dictionary even if only a subset of the dictionary is
+ actually used by the compressor.) If a raw deflate was requested, then the
+ adler32 value is not computed and strm->adler is not set.
+
+ deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
+ parameter is invalid (such as NULL dictionary) or the stream state is
+ inconsistent (for example if deflate has already been called for this stream
+ or if the compression method is bsort). deflateSetDictionary does not
+ perform any compression: this will be done by deflate().
+*/
+
+ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
+ z_streamp source));
+/*
+ Sets the destination stream as a complete copy of the source stream.
+
+ This function can be useful when several compression strategies will be
+ tried, for example when there are several ways of pre-processing the input
+ data with a filter. The streams that will be discarded should then be freed
+ by calling deflateEnd. Note that deflateCopy duplicates the internal
+ compression state which can be quite large, so this strategy is slow and
+ can consume lots of memory.
+
+ deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
+ (such as zalloc being NULL). msg is left unchanged in both source and
+ destination.
+*/
+
+ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
+/*
+ This function is equivalent to deflateEnd followed by deflateInit,
+ but does not free and reallocate all the internal compression state.
+ The stream will keep the same compression level and any other attributes
+ that may have been set by deflateInit2.
+
+ deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
+ stream state was inconsistent (such as zalloc or state being NULL).
+*/
+
+ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
+ int level,
+ int strategy));
+/*
+ Dynamically update the compression level and compression strategy. The
+ interpretation of level and strategy is as in deflateInit2. This can be
+ used to switch between compression and straight copy of the input data, or
+ to switch to a different kind of input data requiring a different
+ strategy. If the compression level is changed, the input available so far
+ is compressed with the old level (and may be flushed); the new level will
+ take effect only at the next call of deflate().
+
+ Before the call of deflateParams, the stream state must be set as for
+ a call of deflate(), since the currently available input may have to
+ be compressed and flushed. In particular, strm->avail_out must be non-zero.
+
+ deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
+ stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
+ if strm->avail_out was zero.
+*/
+
+ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
+ uLong sourceLen));
+/*
+ deflateBound() returns an upper bound on the compressed size after
+ deflation of sourceLen bytes. It must be called after deflateInit()
+ or deflateInit2(). This would be used to allocate an output buffer
+ for deflation in a single pass, and so would be called before deflate().
+*/
+
+ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
+ int bits,
+ int value));
+/*
+ deflatePrime() inserts bits in the deflate output stream. The intent
+ is that this function is used to start off the deflate output with the
+ bits leftover from a previous deflate stream when appending to it. As such,
+ this function can only be used for raw deflate, and must be used before the
+ first deflate() call after a deflateInit2() or deflateReset(). bits must be
+ less than or equal to 16, and that many of the least significant bits of
+ value will be inserted in the output.
+
+ deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
+ stream state was inconsistent.
+*/
+
+/*
+ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
+ int windowBits));
+
+ This is another version of inflateInit with an extra parameter. The
+ fields next_in, avail_in, zalloc, zfree and opaque must be initialized
+ before by the caller.
+
+ The windowBits parameter is the base two logarithm of the maximum window
+ size (the size of the history buffer). It should be in the range 8..15 for
+ this version of the library. The default value is 15 if inflateInit is used
+ instead. windowBits must be greater than or equal to the windowBits value
+ provided to deflateInit2() while compressing, or it must be equal to 15 if
+ deflateInit2() was not used. If a compressed stream with a larger window
+ size is given as input, inflate() will return with the error code
+ Z_DATA_ERROR instead of trying to allocate a larger window.
+
+ windowBits can also be -8..-15 for raw inflate. In this case, -windowBits
+ determines the window size. inflate() will then process raw deflate data,
+ not looking for a zlib or gzip header, not generating a check value, and not
+ looking for any check values for comparison at the end of the stream. This
+ is for use with other formats that use the deflate compressed data format
+ such as zip. Those formats provide their own check values. If a custom
+ format is developed using the raw deflate format for compressed data, it is
+ recommended that a check value such as an adler32 or a crc32 be applied to
+ the uncompressed data as is done in the zlib, gzip, and zip formats. For
+ most applications, the zlib format should be used as is. Note that comments
+ above on the use in deflateInit2() applies to the magnitude of windowBits.
+
+ windowBits can also be greater than 15 for optional gzip decoding. Add
+ 32 to windowBits to enable zlib and gzip decoding with automatic header
+ detection, or add 16 to decode only the gzip format (the zlib format will
+ return a Z_DATA_ERROR. If a gzip stream is being decoded, strm->adler is
+ a crc32 instead of an adler32.
+
+ inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+ memory, Z_STREAM_ERROR if a parameter is invalid (such as a negative
+ memLevel). msg is set to null if there is no error message. inflateInit2
+ does not perform any decompression apart from reading the zlib header if
+ present: this will be done by inflate(). (So next_in and avail_in may be
+ modified, but next_out and avail_out are unchanged.)
+*/
+
+ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
+ const Bytef *dictionary,
+ uInt dictLength));
+/*
+ Initializes the decompression dictionary from the given uncompressed byte
+ sequence. This function must be called immediately after a call of inflate
+ if this call returned Z_NEED_DICT. The dictionary chosen by the compressor
+ can be determined from the adler32 value returned by this call of
+ inflate. The compressor and decompressor must use exactly the same
+ dictionary (see deflateSetDictionary).
+
+ inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
+ parameter is invalid (such as NULL dictionary) or the stream state is
+ inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
+ expected one (incorrect adler32 value). inflateSetDictionary does not
+ perform any decompression: this will be done by subsequent calls of
+ inflate().
+*/
+
+ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
+/*
+ Skips invalid compressed data until a full flush point (see above the
+ description of deflate with Z_FULL_FLUSH) can be found, or until all
+ available input is skipped. No output is provided.
+
+ inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
+ if no more input was provided, Z_DATA_ERROR if no flush point has been found,
+ or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
+ case, the application may save the current current value of total_in which
+ indicates where valid compressed data was found. In the error case, the
+ application may repeatedly call inflateSync, providing more input each time,
+ until success or end of the input data.
+*/
+
+ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
+ z_streamp source));
+/*
+ Sets the destination stream as a complete copy of the source stream.
+
+ This function can be useful when randomly accessing a large stream. The
+ first pass through the stream can periodically record the inflate state,
+ allowing restarting inflate at those points when randomly accessing the
+ stream.
+
+ inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
+ (such as zalloc being NULL). msg is left unchanged in both source and
+ destination.
+*/
+
+ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
+/*
+ This function is equivalent to inflateEnd followed by inflateInit,
+ but does not free and reallocate all the internal decompression state.
+ The stream will keep attributes that may have been set by inflateInit2.
+
+ inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
+ stream state was inconsistent (such as zalloc or state being NULL).
+*/
+
+/*
+ZEXTERN int ZEXPORT inflateBackInit OF((z_stream FAR *strm, int windowBits,
+ unsigned char FAR *window));
+
+ Initialize the internal stream state for decompression using inflateBack()
+ calls. The fields zalloc, zfree and opaque in strm must be initialized
+ before the call. If zalloc and zfree are Z_NULL, then the default library-
+ derived memory allocation routines are used. windowBits is the base two
+ logarithm of the window size, in the range 8..15. window is a caller
+ supplied buffer of that size. Except for special applications where it is
+ assured that deflate was used with small window sizes, windowBits must be 15
+ and a 32K byte window must be supplied to be able to decompress general
+ deflate streams.
+
+ See inflateBack() for the usage of these routines.
+
+ inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
+ the paramaters are invalid, Z_MEM_ERROR if the internal state could not
+ be allocated, or Z_VERSION_ERROR if the version of the library does not
+ match the version of the header file.
+*/
+
+typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *));
+typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
+
+ZEXTERN int ZEXPORT inflateBack OF((z_stream FAR *strm,
+ in_func in, void FAR *in_desc,
+ out_func out, void FAR *out_desc));
+/*
+ inflateBack() does a raw inflate with a single call using a call-back
+ interface for input and output. This is more efficient than inflate() for
+ file i/o applications in that it avoids copying between the output and the
+ sliding window by simply making the window itself the output buffer. This
+ function trusts the application to not change the output buffer passed by
+ the output function, at least until inflateBack() returns.
+
+ inflateBackInit() must be called first to allocate the internal state
+ and to initialize the state with the user-provided window buffer.
+ inflateBack() may then be used multiple times to inflate a complete, raw
+ deflate stream with each call. inflateBackEnd() is then called to free
+ the allocated state.
+
+ A raw deflate stream is one with no zlib or gzip header or trailer.
+ This routine would normally be used in a utility that reads zip or gzip
+ files and writes out uncompressed files. The utility would decode the
+ header and process the trailer on its own, hence this routine expects
+ only the raw deflate stream to decompress. This is different from the
+ normal behavior of inflate(), which expects either a zlib or gzip header and
+ trailer around the deflate stream.
+
+ inflateBack() uses two subroutines supplied by the caller that are then
+ called by inflateBack() for input and output. inflateBack() calls those
+ routines until it reads a complete deflate stream and writes out all of the
+ uncompressed data, or until it encounters an error. The function's
+ parameters and return types are defined above in the in_func and out_func
+ typedefs. inflateBack() will call in(in_desc, &buf) which should return the
+ number of bytes of provided input, and a pointer to that input in buf. If
+ there is no input available, in() must return zero--buf is ignored in that
+ case--and inflateBack() will return a buffer error. inflateBack() will call
+ out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. out()
+ should return zero on success, or non-zero on failure. If out() returns
+ non-zero, inflateBack() will return with an error. Neither in() nor out()
+ are permitted to change the contents of the window provided to
+ inflateBackInit(), which is also the buffer that out() uses to write from.
+ The length written by out() will be at most the window size. Any non-zero
+ amount of input may be provided by in().
+
+ For convenience, inflateBack() can be provided input on the first call by
+ setting strm->next_in and strm->avail_in. If that input is exhausted, then
+ in() will be called. Therefore strm->next_in must be initialized before
+ calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called
+ immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in
+ must also be initialized, and then if strm->avail_in is not zero, input will
+ initially be taken from strm->next_in[0 .. strm->avail_in - 1].
+
+ The in_desc and out_desc parameters of inflateBack() is passed as the
+ first parameter of in() and out() respectively when they are called. These
+ descriptors can be optionally used to pass any information that the caller-
+ supplied in() and out() functions need to do their job.
+
+ On return, inflateBack() will set strm->next_in and strm->avail_in to
+ pass back any unused input that was provided by the last in() call. The
+ return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR
+ if in() or out() returned an error, Z_DATA_ERROR if there was a format
+ error in the deflate stream (in which case strm->msg is set to indicate the
+ nature of the error), or Z_STREAM_ERROR if the stream was not properly
+ initialized. In the case of Z_BUF_ERROR, an input or output error can be
+ distinguished using strm->next_in which will be Z_NULL only if in() returned
+ an error. If strm->next is not Z_NULL, then the Z_BUF_ERROR was due to
+ out() returning non-zero. (in() will always be called before out(), so
+ strm->next_in is assured to be defined if out() returns non-zero.) Note
+ that inflateBack() cannot return Z_OK.
+*/
+
+ZEXTERN int ZEXPORT inflateBackEnd OF((z_stream FAR *strm));
+/*
+ All memory allocated by inflateBackInit() is freed.
+
+ inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream
+ state was inconsistent.
+*/
+
+ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));
+/* Return flags indicating compile-time options.
+
+ Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other:
+ 1.0: size of uInt
+ 3.2: size of uLong
+ 5.4: size of voidpf (pointer)
+ 7.6: size of z_off_t
+
+ Compiler, assembler, and debug options:
+ 8: DEBUG
+ 9: ASMV or ASMINF -- use ASM code
+ 10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention
+ 11: 0 (reserved)
+
+ One-time table building (smaller code, but not thread-safe if true):
+ 12: BUILDFIXED -- build static block decoding tables when needed
+ 13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed
+ 14,15: 0 (reserved)
+
+ Library content (indicates missing functionality):
+ 16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking
+ deflate code when not needed)
+ 17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect
+ and decode gzip streams (to avoid linking crc code)
+ 18-19: 0 (reserved)
+
+ Operation variations (changes in library functionality):
+ 20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate
+ 21: FASTEST -- deflate algorithm with only one, lowest compression level
+ 22,23: 0 (reserved)
+
+ The sprintf variant used by gzprintf (zero is best):
+ 24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format
+ 25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure!
+ 26: 0 = returns value, 1 = void -- 1 means inferred string length returned
+
+ Remainder:
+ 27-31: 0 (reserved)
+ */
+
+
+ /* utility functions */
+
+/*
+ The following utility functions are implemented on top of the
+ basic stream-oriented functions. To simplify the interface, some
+ default options are assumed (compression level and memory usage,
+ standard memory allocation functions). The source code of these
+ utility functions can easily be modified if you need special options.
+*/
+
+ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen,
+ const Bytef *source, uLong sourceLen));
+/*
+ Compresses the source buffer into the destination buffer. sourceLen is
+ the byte length of the source buffer. Upon entry, destLen is the total
+ size of the destination buffer, which must be at least the value returned
+ by compressBound(sourceLen). Upon exit, destLen is the actual size of the
+ compressed buffer.
+ This function can be used to compress a whole file at once if the
+ input file is mmap'ed.
+ compress returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_BUF_ERROR if there was not enough room in the output
+ buffer.
+*/
+
+ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen,
+ const Bytef *source, uLong sourceLen,
+ int level));
+/*
+ Compresses the source buffer into the destination buffer. The level
+ parameter has the same meaning as in deflateInit. sourceLen is the byte
+ length of the source buffer. Upon entry, destLen is the total size of the
+ destination buffer, which must be at least the value returned by
+ compressBound(sourceLen). Upon exit, destLen is the actual size of the
+ compressed buffer.
+
+ compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+ memory, Z_BUF_ERROR if there was not enough room in the output buffer,
+ Z_STREAM_ERROR if the level parameter is invalid.
+*/
+
+ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen));
+/*
+ compressBound() returns an upper bound on the compressed size after
+ compress() or compress2() on sourceLen bytes. It would be used before
+ a compress() or compress2() call to allocate the destination buffer.
+*/
+
+ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
+ const Bytef *source, uLong sourceLen));
+/*
+ Decompresses the source buffer into the destination buffer. sourceLen is
+ the byte length of the source buffer. Upon entry, destLen is the total
+ size of the destination buffer, which must be large enough to hold the
+ entire uncompressed data. (The size of the uncompressed data must have
+ been saved previously by the compressor and transmitted to the decompressor
+ by some mechanism outside the scope of this compression library.)
+ Upon exit, destLen is the actual size of the compressed buffer.
+ This function can be used to decompress a whole file at once if the
+ input file is mmap'ed.
+
+ uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_BUF_ERROR if there was not enough room in the output
+ buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete.
+*/
+
+
+typedef voidp gzFile;
+
+ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
+/*
+ Opens a gzip (.gz) file for reading or writing. The mode parameter
+ is as in fopen ("rb" or "wb") but can also include a compression level+ ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for+ Huffman only compression as in "wb1h", or 'R' for run-length encoding
+ as in "wb1R". (See the description of deflateInit2 for more information
+ about the strategy parameter.)
+
+ gzopen can be used to read a file which is not in gzip format; in this
+ case gzread will directly read from the file without decompression.
+
+ gzopen returns NULL if the file could not be opened or if there was
+ insufficient memory to allocate the (de)compression state; errno
+ can be checked to distinguish the two cases (if errno is zero, the
+ zlib error is Z_MEM_ERROR). */
+
+ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode));
+/*
+ gzdopen() associates a gzFile with the file descriptor fd. File
+ descriptors are obtained from calls like open, dup, creat, pipe or
+ fileno (in the file has been previously opened with fopen).
+ The mode parameter is as in gzopen.
+ The next call of gzclose on the returned gzFile will also close the
+ file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
+ descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
+ gzdopen returns NULL if there was insufficient memory to allocate
+ the (de)compression state.
+*/
+
+ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
+/*
+ Dynamically update the compression level or strategy. See the description
+ of deflateInit2 for the meaning of these parameters.
+ gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not
+ opened for writing.
+*/
+
+ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
+/*
+ Reads the given number of uncompressed bytes from the compressed file.
+ If the input file was not in gzip format, gzread copies the given number
+ of bytes into the buffer.
+ gzread returns the number of uncompressed bytes actually read (0 for
+ end of file, -1 for error). */
+
+ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
+ voidpc buf, unsigned len));
+/*
+ Writes the given number of uncompressed bytes into the compressed file.
+ gzwrite returns the number of uncompressed bytes actually written
+ (0 in case of error).
+*/
+
+ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...));
+/*
+ Converts, formats, and writes the args to the compressed file under
+ control of the format string, as in fprintf. gzprintf returns the number of
+ uncompressed bytes actually written (0 in case of error). The number of
+ uncompressed bytes written is limited to 4095. The caller should assure that
+ this limit is not exceeded. If it is exceeded, then gzprintf() will return
+ return an error (0) with nothing written. In this case, there may also be a
+ buffer overflow with unpredictable consequences, which is possible only if
+ zlib was compiled with the insecure functions sprintf() or vsprintf()
+ because the secure snprintf() or vsnprintf() functions were not available.
+*/
+
+ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
+/*
+ Writes the given null-terminated string to the compressed file, excluding
+ the terminating null character.
+ gzputs returns the number of characters written, or -1 in case of error.
+*/
+
+ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
+/*
+ Reads bytes from the compressed file until len-1 characters are read, or
+ a newline character is read and transferred to buf, or an end-of-file
+ condition is encountered. The string is then terminated with a null
+ character.
+ gzgets returns buf, or Z_NULL in case of error.
+*/
+
+ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c));
+/*
+ Writes c, converted to an unsigned char, into the compressed file.
+ gzputc returns the value that was written, or -1 in case of error.
+*/
+
+ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
+/*
+ Reads one byte from the compressed file. gzgetc returns this byte
+ or -1 in case of end of file or error.
+*/
+
+ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));
+/*
+ Push one character back onto the stream to be read again later.
+ Only one character of push-back is allowed. gzungetc() returns the
+ character pushed, or -1 on failure. gzungetc() will fail if a
+ character has been pushed but not read yet, or if c is -1. The pushed
+ character will be discarded if the stream is repositioned with gzseek()
+ or gzrewind().
+*/
+
+ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
+/*
+ Flushes all pending output into the compressed file. The parameter
+ flush is as in the deflate() function. The return value is the zlib
+ error number (see function gzerror below). gzflush returns Z_OK if
+ the flush parameter is Z_FINISH and all output could be flushed.
+ gzflush should be called only when strictly necessary because it can
+ degrade compression.
+*/
+
+ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file,
+ z_off_t offset, int whence));
+/*
+ Sets the starting position for the next gzread or gzwrite on the
+ given compressed file. The offset represents a number of bytes in the
+ uncompressed data stream. The whence parameter is defined as in lseek(2);
+ the value SEEK_END is not supported.
+ If the file is opened for reading, this function is emulated but can be
+ extremely slow. If the file is opened for writing, only forward seeks are
+ supported; gzseek then compresses a sequence of zeroes up to the new
+ starting position.
+
+ gzseek returns the resulting offset location as measured in bytes from
+ the beginning of the uncompressed stream, or -1 in case of error, in
+ particular if the file is opened for writing and the new starting position
+ would be before the current position.
+*/
+
+ZEXTERN int ZEXPORT gzrewind OF((gzFile file));
+/*
+ Rewinds the given file. This function is supported only for reading.
+
+ gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
+*/
+
+ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file));
+/*
+ Returns the starting position for the next gzread or gzwrite on the
+ given compressed file. This position represents a number of bytes in the
+ uncompressed data stream.
+
+ gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
+*/
+
+ZEXTERN int ZEXPORT gzeof OF((gzFile file));
+/*
+ Returns 1 when EOF has previously been detected reading the given
+ input stream, otherwise zero.
+*/
+
+ZEXTERN int ZEXPORT gzclose OF((gzFile file));
+/*
+ Flushes all pending output if necessary, closes the compressed file
+ and deallocates all the (de)compression state. The return value is the zlib
+ error number (see function gzerror below).
+*/
+
+ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
+/*
+ Returns the error message for the last error which occurred on the
+ given compressed file. errnum is set to zlib error number. If an
+ error occurred in the file system and not in the compression library,
+ errnum is set to Z_ERRNO and the application may consult errno
+ to get the exact error code.
+*/
+
+ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
+/*
+ Clears the error and end-of-file flags for file. This is analogous to the
+ clearerr() function in stdio. This is useful for continuing to read a gzip
+ file that is being written concurrently.
+*/
+
+ /* checksum functions */
+
+/*
+ These functions are not related to compression but are exported
+ anyway because they might be useful in applications using the
+ compression library.
+*/
+
+ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
+
+/*
+ Update a running Adler-32 checksum with the bytes buf[0..len-1] and
+ return the updated checksum. If buf is NULL, this function returns
+ the required initial value for the checksum.
+ An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
+ much faster. Usage example:
+
+ uLong adler = adler32(0L, Z_NULL, 0);
+
+ while (read_buffer(buffer, length) != EOF) {+ adler = adler32(adler, buffer, length);
+ }
+ if (adler != original_adler) error();
+*/
+
+ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
+/*
+ Update a running crc with the bytes buf[0..len-1] and return the updated
+ crc. If buf is NULL, this function returns the required initial value
+ for the crc. Pre- and post-conditioning (one's complement) is performed
+ within this function so it shouldn't be done by the application.
+ Usage example:
+
+ uLong crc = crc32(0L, Z_NULL, 0);
+
+ while (read_buffer(buffer, length) != EOF) {+ crc = crc32(crc, buffer, length);
+ }
+ if (crc != original_crc) error();
+*/
+
+
+ /* various hacks, don't look :) */
+
+/* deflateInit and inflateInit are macros to allow checking the zlib version
+ * and the compiler's view of z_stream:
+ */
+ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level,
+ const char *version, int stream_size));
+ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm,
+ const char *version, int stream_size));
+ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method,
+ int windowBits, int memLevel,
+ int strategy, const char *version,
+ int stream_size));
+ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
+ const char *version, int stream_size));
+ZEXTERN int ZEXPORT inflateBackInit_ OF((z_stream FAR *strm, int windowBits,
+ unsigned char FAR *window,
+ const char *version,
+ int stream_size));
+#define deflateInit(strm, level) \
+ deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream))
+#define inflateInit(strm) \
+ inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream))
+#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
+ deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
+ (strategy), ZLIB_VERSION, sizeof(z_stream))
+#define inflateInit2(strm, windowBits) \
+ inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
+#define inflateBackInit(strm, windowBits, window) \
+ inflateBackInit_((strm), (windowBits), (window), \
+ ZLIB_VERSION, sizeof(z_stream))
+
+
+#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
+ struct internal_state {int dummy;}; /* hack for buggy compilers */+#endif
+
+ZEXTERN const char * ZEXPORT zError OF((int));
+ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp z));
+ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ZLIB_H */
--- /dev/null
+++ b/src/gfx/zlib/zutil.c
@@ -1,0 +1,319 @@
+/* zutil.c -- target dependent utility functions for the compression library
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id: zutil.c,v 1.1.1.1 2005/04/24 21:39:38 giles Exp $ */
+
+#include "zutil.h"
+
+#ifndef NO_DUMMY_DECL
+struct internal_state {int dummy;}; /* for buggy compilers */+#endif
+
+#ifndef STDC
+extern void exit OF((int));
+#endif
+
+const char * const z_errmsg[10] = {+"need dictionary", /* Z_NEED_DICT 2 */
+"stream end", /* Z_STREAM_END 1 */
+"", /* Z_OK 0 */
+"file error", /* Z_ERRNO (-1) */
+"stream error", /* Z_STREAM_ERROR (-2) */
+"data error", /* Z_DATA_ERROR (-3) */
+"insufficient memory", /* Z_MEM_ERROR (-4) */
+"buffer error", /* Z_BUF_ERROR (-5) */
+"incompatible version",/* Z_VERSION_ERROR (-6) */
+""};
+
+
+const char * ZEXPORT zlibVersion()
+{+ return ZLIB_VERSION;
+}
+
+uLong ZEXPORT zlibCompileFlags()
+{+ uLong flags;
+
+ flags = 0;
+ switch (sizeof(uInt)) {+ case 2: break;
+ case 4: flags += 1; break;
+ case 8: flags += 2; break;
+ default: flags += 3;
+ }
+ switch (sizeof(uLong)) {+ case 2: break;
+ case 4: flags += 1 << 2; break;
+ case 8: flags += 2 << 2; break;
+ default: flags += 3 << 2;
+ }
+ switch (sizeof(voidpf)) {+ case 2: break;
+ case 4: flags += 1 << 4; break;
+ case 8: flags += 2 << 4; break;
+ default: flags += 3 << 4;
+ }
+ switch (sizeof(z_off_t)) {+ case 2: break;
+ case 4: flags += 1 << 6; break;
+ case 8: flags += 2 << 6; break;
+ default: flags += 3 << 6;
+ }
+#ifdef DEBUG
+ flags += 1 << 8;
+#endif
+#if defined(ASMV) || defined(ASMINF)
+ flags += 1 << 9;
+#endif
+#ifdef ZLIB_WINAPI
+ flags += 1 << 10;
+#endif
+#ifdef BUILDFIXED
+ flags += 1 << 12;
+#endif
+#ifdef DYNAMIC_CRC_TABLE
+ flags += 1 << 13;
+#endif
+#ifdef NO_GZCOMPRESS
+ flags += 1 << 16;
+#endif
+#ifdef NO_GZIP
+ flags += 1 << 17;
+#endif
+#ifdef PKZIP_BUG_WORKAROUND
+ flags += 1 << 20;
+#endif
+#ifdef FASTEST
+ flags += 1 << 21;
+#endif
+#ifdef STDC
+# ifdef NO_vsnprintf
+ flags += 1 << 25;
+# ifdef HAS_vsprintf_void
+ flags += 1 << 26;
+# endif
+# else
+# ifdef HAS_vsnprintf_void
+ flags += 1 << 26;
+# endif
+# endif
+#else
+ flags += 1 << 24;
+# ifdef NO_snprintf
+ flags += 1 << 25;
+# ifdef HAS_sprintf_void
+ flags += 1 << 26;
+# endif
+# else
+# ifdef HAS_snprintf_void
+ flags += 1 << 26;
+# endif
+# endif
+#endif
+ return flags;
+}
+
+#ifdef DEBUG
+
+# ifndef verbose
+# define verbose 0
+# endif
+int z_verbose = verbose;
+
+void z_error (m)
+ char *m;
+{+ fprintf(stderr, "%s\n", m);
+ exit(1);
+}
+#endif
+
+/* exported to allow conversion of error code to string for compress() and
+ * uncompress()
+ */
+const char * ZEXPORT zError(err)
+ int err;
+{+ return ERR_MSG(err);
+}
+
+#if defined(_WIN32_WCE)
+ /* does not exist on WCE */
+ int errno = 0;
+#endif
+
+#ifndef HAVE_MEMCPY
+
+void zmemcpy(dest, source, len)
+ Bytef* dest;
+ const Bytef* source;
+ uInt len;
+{+ if (len == 0) return;
+ do {+ *dest++ = *source++; /* ??? to be unrolled */
+ } while (--len != 0);
+}
+
+int zmemcmp(s1, s2, len)
+ const Bytef* s1;
+ const Bytef* s2;
+ uInt len;
+{+ uInt j;
+
+ for (j = 0; j < len; j++) {+ if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
+ }
+ return 0;
+}
+
+void zmemzero(dest, len)
+ Bytef* dest;
+ uInt len;
+{+ if (len == 0) return;
+ do {+ *dest++ = 0; /* ??? to be unrolled */
+ } while (--len != 0);
+}
+#endif
+
+
+#ifdef SYS16BIT
+
+#ifdef __TURBOC__
+/* Turbo C in 16-bit mode */
+
+# define MY_ZCALLOC
+
+/* Turbo C malloc() does not allow dynamic allocation of 64K bytes
+ * and farmalloc(64K) returns a pointer with an offset of 8, so we
+ * must fix the pointer. Warning: the pointer must be put back to its
+ * original form in order to free it, use zcfree().
+ */
+
+#define MAX_PTR 10
+/* 10*64K = 640K */
+
+local int next_ptr = 0;
+
+typedef struct ptr_table_s {+ voidpf org_ptr;
+ voidpf new_ptr;
+} ptr_table;
+
+local ptr_table table[MAX_PTR];
+/* This table is used to remember the original form of pointers
+ * to large buffers (64K). Such pointers are normalized with a zero offset.
+ * Since MSDOS is not a preemptive multitasking OS, this table is not
+ * protected from concurrent access. This hack doesn't work anyway on
+ * a protected system like OS/2. Use Microsoft C instead.
+ */
+
+voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
+{+ voidpf buf = opaque; /* just to make some compilers happy */
+ ulg bsize = (ulg)items*size;
+
+ /* If we allocate less than 65520 bytes, we assume that farmalloc
+ * will return a usable pointer which doesn't have to be normalized.
+ */
+ if (bsize < 65520L) {+ buf = farmalloc(bsize);
+ if (*(ush*)&buf != 0) return buf;
+ } else {+ buf = farmalloc(bsize + 16L);
+ }
+ if (buf == NULL || next_ptr >= MAX_PTR) return NULL;
+ table[next_ptr].org_ptr = buf;
+
+ /* Normalize the pointer to seg:0 */
+ *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;
+ *(ush*)&buf = 0;
+ table[next_ptr++].new_ptr = buf;
+ return buf;
+}
+
+void zcfree (voidpf opaque, voidpf ptr)
+{+ int n;
+ if (*(ush*)&ptr != 0) { /* object < 64K */+ farfree(ptr);
+ return;
+ }
+ /* Find the original pointer */
+ for (n = 0; n < next_ptr; n++) {+ if (ptr != table[n].new_ptr) continue;
+
+ farfree(table[n].org_ptr);
+ while (++n < next_ptr) {+ table[n-1] = table[n];
+ }
+ next_ptr--;
+ return;
+ }
+ ptr = opaque; /* just to make some compilers happy */
+ Assert(0, "zcfree: ptr not found");
+}
+
+#endif /* __TURBOC__ */
+
+
+#ifdef M_I86
+/* Microsoft C in 16-bit mode */
+
+# define MY_ZCALLOC
+
+#if (!defined(_MSC_VER) || (_MSC_VER <= 600))
+# define _halloc halloc
+# define _hfree hfree
+#endif
+
+voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
+{+ if (opaque) opaque = 0; /* to make compiler happy */
+ return _halloc((long)items, size);
+}
+
+void zcfree (voidpf opaque, voidpf ptr)
+{+ if (opaque) opaque = 0; /* to make compiler happy */
+ _hfree(ptr);
+}
+
+#endif /* M_I86 */
+
+#endif /* SYS16BIT */
+
+
+#ifndef MY_ZCALLOC /* Any system without a special alloc function */
+
+#ifndef STDC
+extern voidp malloc OF((uInt size));
+extern voidp calloc OF((uInt items, uInt size));
+extern void free OF((voidpf ptr));
+#endif
+
+voidpf zcalloc (opaque, items, size)
+ voidpf opaque;
+ unsigned items;
+ unsigned size;
+{+ if (opaque) items += size - size; /* make compiler happy */
+ return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
+ (voidpf)calloc(items, size);
+}
+
+void zcfree (opaque, ptr)
+ voidpf opaque;
+ voidpf ptr;
+{+ free(ptr);
+ if (opaque) return; /* make compiler happy */
+}
+
+#endif /* MY_ZCALLOC */
--- /dev/null
+++ b/src/gfx/zlib/zutil.h
@@ -1,0 +1,263 @@
+/* zutil.h -- internal interface and configuration of the compression library
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+ part of the implementation of the compression library and is
+ subject to change. Applications should only use zlib.h.
+ */
+
+/* @(#) $Id: zutil.h,v 1.1.1.1 2005/04/24 21:39:38 giles Exp $ */
+
+#ifndef ZUTIL_H
+#define ZUTIL_H
+
+#define ZLIB_INTERNAL
+#include "zlib.h"
+
+#ifdef STDC
+# include <stddef.h>
+# include <string.h>
+# include <stdlib.h>
+#endif
+#ifdef NO_ERRNO_H
+ extern int errno;
+#else
+# include <errno.h>
+#endif
+
+#ifndef local
+# define local static
+#endif
+/* compile with -Dlocal if your debugger can't find static symbols */
+
+typedef unsigned char uch;
+typedef uch FAR uchf;
+typedef unsigned short ush;
+typedef ush FAR ushf;
+typedef unsigned long ulg;
+
+extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
+/* (size given to avoid silly warnings with Visual C++) */
+
+#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
+
+#define ERR_RETURN(strm,err) \
+ return (strm->msg = (char*)ERR_MSG(err), (err))
+/* To be used only when the state is known to be valid */
+
+ /* common constants */
+
+#ifndef DEF_WBITS
+# define DEF_WBITS MAX_WBITS
+#endif
+/* default windowBits for decompression. MAX_WBITS is for compression only */
+
+#if MAX_MEM_LEVEL >= 8
+# define DEF_MEM_LEVEL 8
+#else
+# define DEF_MEM_LEVEL MAX_MEM_LEVEL
+#endif
+/* default memLevel */
+
+#define STORED_BLOCK 0
+#define STATIC_TREES 1
+#define DYN_TREES 2
+/* The three kinds of block type */
+
+#define MIN_MATCH 3
+#define MAX_MATCH 258
+/* The minimum and maximum match lengths */
+
+#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
+
+ /* target dependencies */
+
+#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
+# define OS_CODE 0x00
+# if defined(__TURBOC__) || defined(__BORLANDC__)
+# if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
+ /* Allow compilation with ANSI keywords only enabled */
+ void _Cdecl farfree( void *block );
+ void *_Cdecl farmalloc( unsigned long nbytes );
+# else
+# include <alloc.h>
+# endif
+# else /* MSC or DJGPP */
+# include <malloc.h>
+# endif
+#endif
+
+#ifdef AMIGA
+# define OS_CODE 0x01
+#endif
+
+#if defined(VAXC) || defined(VMS)
+# define OS_CODE 0x02
+# define F_OPEN(name, mode) \
+ fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
+#endif
+
+#if defined(ATARI) || defined(atarist)
+# define OS_CODE 0x05
+#endif
+
+#ifdef OS2
+# define OS_CODE 0x06
+#endif
+
+#if defined(MACOS) || defined(TARGET_OS_MAC)
+# define OS_CODE 0x07
+# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
+# include <unix.h> /* for fdopen */
+# else
+# ifndef fdopen
+# define fdopen(fd,mode) NULL /* No fdopen() */
+# endif
+# endif
+#endif
+
+#ifdef TOPS20
+# define OS_CODE 0x0a
+#endif
+
+#ifdef WIN32
+# ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
+# define OS_CODE 0x0b
+# endif
+#endif
+
+#ifdef __50SERIES /* Prime/PRIMOS */
+# define OS_CODE 0x0f
+#endif
+
+#if defined(_BEOS_) || defined(RISCOS)
+# define fdopen(fd,mode) NULL /* No fdopen() */
+#endif
+
+#if (defined(_MSC_VER) && (_MSC_VER > 600))
+# if defined(_WIN32_WCE)
+# define fdopen(fd,mode) NULL /* No fdopen() */
+# ifndef _PTRDIFF_T_DEFINED
+ typedef int ptrdiff_t;
+# define _PTRDIFF_T_DEFINED
+# endif
+# else
+# define fdopen(fd,type) _fdopen(fd,type)
+# endif
+#endif
+
+ /* common defaults */
+
+#ifndef OS_CODE
+# define OS_CODE 0x03 /* assume Unix */
+#endif
+
+#ifndef F_OPEN
+# define F_OPEN(name, mode) fopen((name), (mode))
+#endif
+
+ /* functions */
+
+#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
+# ifndef HAVE_VSNPRINTF
+# define HAVE_VSNPRINTF
+# endif
+#endif
+#if defined(__CYGWIN__)
+# ifndef HAVE_VSNPRINTF
+# define HAVE_VSNPRINTF
+# endif
+#endif
+#ifndef HAVE_VSNPRINTF
+# ifdef MSDOS
+ /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
+ but for now we just assume it doesn't. */
+# define NO_vsnprintf
+# endif
+# ifdef __TURBOC__
+# define NO_vsnprintf
+# endif
+# ifdef WIN32
+ /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
+# if !defined(vsnprintf) && !defined(NO_vsnprintf)
+# define vsnprintf _vsnprintf
+# endif
+# endif
+# ifdef __SASC
+# define NO_vsnprintf
+# endif
+#endif
+#ifdef VMS
+# define NO_vsnprintf
+#endif
+
+#ifdef HAVE_STRERROR
+# ifndef VMS
+ extern char *strerror OF((int));
+# endif
+# define zstrerror(errnum) strerror(errnum)
+#else
+# define zstrerror(errnum) ""
+#endif
+
+#if defined(pyr)
+# define NO_MEMCPY
+#endif
+#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
+ /* Use our own functions for small and medium model with MSC <= 5.0.
+ * You may have to use the same strategy for Borland C (untested).
+ * The __SC__ check is for Symantec.
+ */
+# define NO_MEMCPY
+#endif
+#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
+# define HAVE_MEMCPY
+#endif
+#ifdef HAVE_MEMCPY
+# ifdef SMALL_MEDIUM /* MSDOS small or medium model */
+# define zmemcpy _fmemcpy
+# define zmemcmp _fmemcmp
+# define zmemzero(dest, len) _fmemset(dest, 0, len)
+# else
+# define zmemcpy memcpy
+# define zmemcmp memcmp
+# define zmemzero(dest, len) memset(dest, 0, len)
+# endif
+#else
+ extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
+ extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
+ extern void zmemzero OF((Bytef* dest, uInt len));
+#endif
+
+/* Diagnostic functions */
+#ifdef DEBUG
+# include <stdio.h>
+ extern int z_verbose;
+ extern void z_error OF((char *m));
+# define Assert(cond,msg) {if(!(cond)) z_error(msg);}+# define Trace(x) {if (z_verbose>=0) fprintf x ;}+# define Tracev(x) {if (z_verbose>0) fprintf x ;}+# define Tracevv(x) {if (z_verbose>1) fprintf x ;}+# define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}+# define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}+#else
+# define Assert(cond,msg)
+# define Trace(x)
+# define Tracev(x)
+# define Tracevv(x)
+# define Tracec(c,x)
+# define Tracecv(c,x)
+#endif
+
+
+voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
+void zcfree OF((voidpf opaque, voidpf ptr));
+
+#define ZALLOC(strm, items, size) \
+ (*((strm)->zalloc))((strm)->opaque, (items), (size))
+#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
+#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}+
+#endif /* ZUTIL_H */