ref: b691654525bcadb8474734fd421943a8708d4c84
dir: /common/libsndfile/src/common.c/
/*
** Copyright (C) 1999-2000 Erik de Castro Lopo <erikd@zip.com.au>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU Lesser General Public License as published by
** the Free Software Foundation; either version 2.1 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdarg.h>
#include <string.h>
#include "sndfile.h"
#include "sfendian.h"
#include "common.h"
/*-----------------------------------------------------------------------------------------------
*/
void endswap_short_array (short *ptr, int len)
{ int k ;
for (k = 0 ; k < len ; k++)
ptr[k] = ((((ptr[k])>>8)&0xFF)|(((ptr[k])&0xFF)<<8)) ;
} /* endswap_short_array */
void endswap_int_array (int *ptr, int len)
{ int k ;
for (k = 0 ; k < len ; k++)
ptr[k] = ((((ptr[k])>>24)&0xFF)|(((ptr[k])>>8)&0xFF00)|
(((ptr[k])&0xFF00)<<8)|(((ptr[k])&0xFF)<<24)) ;
} /* endswap_int_array */
/*-----------------------------------------------------------------------------------------------
*/
#define psf_putchar(a,b) \
if ((a)->strindex < SF_BUFFER_LEN - 1) \
{ (a)->strbuffer [(a)->strindex++] = (b) ; \
(a)->strbuffer [(a)->strindex] = 0 ; \
} ;
void psf_sprintf (SF_PRIVATE *psf, char *format, ...)
{ va_list ap ;
int d, tens, shift ;
char c, *strptr, istr [5] ;
va_start(ap, format);
/* printf ("psf_sprintf : %s\n", format) ; */
while ((c = *format++))
{ if (c != '%')
{ psf_putchar (psf, c) ;
continue ;
} ;
switch((c = *format++))
{ case 's': /* string */
strptr = va_arg (ap, char *) ;
while (*strptr)
psf_putchar (psf, *strptr++) ;
break;
case 'd': /* int */
d = va_arg (ap, int) ;
if (d == 0)
{ psf_putchar (psf, '0') ;
break ;
}
if (d < 0)
{ psf_putchar (psf, '-') ;
d = -d ;
} ;
tens = 1 ;
while (d / tens >= 10)
tens *= 10 ;
while (tens > 0)
{ psf_putchar (psf, '0' + d / tens) ;
d %= tens ;
tens /= 10 ;
} ;
break;
case 'X': /* hex */
d = va_arg (ap, int) ;
if (d == 0)
{ psf_putchar (psf, '0') ;
break ;
} ;
shift = 28 ;
while (! ((0xF << shift) & d))
shift -= 4 ;
while (shift >= 0)
{ c = (d >> shift) & 0xF ;
psf_putchar (psf, (c > 9) ? c + 'A' - 10 : c + '0') ;
shift -= 4 ;
} ;
break;
case 'c': /* char */
c = va_arg (ap, int) & 0xFF ;
psf_putchar (psf, c);
break;
case 'D': /* int2str */
d = va_arg (ap, int);
if (CPU_IS_LITTLE_ENDIAN)
{ istr [0] = d & 0xFF ;
istr [1] = (d >> 8) & 0xFF ;
istr [2] = (d >> 16) & 0xFF ;
istr [3] = (d >> 24) & 0xFF ;
}
else
{ istr [3] = d & 0xFF ;
istr [2] = (d >> 8) & 0xFF ;
istr [1] = (d >> 16) & 0xFF ;
istr [0] = (d >> 24) & 0xFF ;
} ;
istr [4] = 0 ;
strptr = istr ;
while (*strptr)
{ c = *strptr++ ;
psf_putchar (psf, c) ;
} ;
break;
default :
psf_putchar (psf, '?') ;
psf_putchar (psf, c) ;
psf_putchar (psf, '?') ;
break ;
} /* switch */
} /* while */
va_end(ap);
return ;
} /* psf_sprintf */
/*------------------------------------------------------------------------------
** Format specifiers for psf_hprintf are as follows
** m - marker - four bytes - no endian problems
** w - two byte value - little endian
** W - two byte value - big endian
** l - four byte value - little endian
** L - four byte value - big endian
** s - string preceded by a little endian four byte length
** S - string preceded by a big endian four byte length
** b - binary data (see below)
**
** To write a word followed by a long (both little endian) use:
** psf_hprintf ("wl", wordval, longval) ;
**
** To write binary data use:
** psf_hprintf ("b", &bindata, sizeof (bindata)) ;
*/
/* These macros may seem a bit messy but do prevent problems with processors which
** seg. fault when asked to write an int or short to a non-int/short aligned address.
*/
#if (CPU_IS_BIG_ENDIAN == 1)
#define put_int(psf,x) { (psf)->header [(psf)->headindex++] = ((x) >> 24) & 0xFF ; \
(psf)->header [(psf)->headindex++] = ((x) >> 16) & 0xFF ; \
(psf)->header [(psf)->headindex++] = ((x) >> 8) & 0xFF ; \
(psf)->header [(psf)->headindex++] = (x) & 0xFF ; }
#define put_short(psf,x) { (psf)->header [(psf)->headindex++] = ((x) >> 8) & 0xFF ; \
(psf)->header [(psf)->headindex++] = (x) & 0xFF ; }
#elif (CPU_IS_LITTLE_ENDIAN == 1)
#define put_int(psf,x) { (psf)->header [(psf)->headindex++] = (x) & 0xFF ; \
(psf)->header [(psf)->headindex++] = ((x) >> 8) & 0xFF ; \
(psf)->header [(psf)->headindex++] = ((x) >> 16) & 0xFF ; \
(psf)->header [(psf)->headindex++] = ((x) >> 24) & 0xFF ; }
#define put_short(psf,x) { (psf)->header [(psf)->headindex++] = (x) & 0xFF ; \
(psf)->header [(psf)->headindex++] = ((x) >> 8) & 0xFF ; }
#else
# error "Cannot determine endian-ness of processor."
#endif
void psf_hprintf (SF_PRIVATE *psf, char *format, ...)
{ va_list argptr ;
unsigned int longdata ;
unsigned short worddata ;
void *bindata ;
size_t size ;
char c, *strptr ;
va_start(argptr, format);
while ((c = *format++))
{ switch (c)
{ case 'm' :
longdata = va_arg (argptr, unsigned int) ;
put_int (psf, longdata) ;
break ;
case 'l' :
longdata = va_arg (argptr, unsigned int) ;
longdata = H2LE_INT (longdata) ;
put_int (psf, longdata) ;
break ;
case 'L' :
longdata = va_arg (argptr, unsigned int) ;
longdata = H2BE_INT (longdata) ;
put_int (psf, longdata) ;
break ;
case 'w' :
worddata = va_arg (argptr, int) & 0xFFFF ;
worddata = H2LE_SHORT (worddata) ;
put_short (psf, worddata) ;
break ;
case 'W' :
worddata = va_arg (argptr, int) & 0xFFFF ;
worddata = H2BE_SHORT (worddata) ;
put_short (psf, worddata) ;
break ;
case 'b' :
bindata = va_arg (argptr, void *) ;
size = va_arg (argptr, size_t) ;
memcpy (&(psf->header [psf->headindex]), bindata, size) ;
psf->headindex += size ;
break ;
case 's' :
strptr = va_arg (argptr, char *) ;
size = strlen (strptr) + 1 ;
size += (size & 1) ;
longdata = H2LE_INT (size) ;
put_int (psf, longdata) ;
memcpy (&(psf->header [psf->headindex]), strptr, size) ;
psf->headindex += size ;
break ;
case 'S' :
strptr = va_arg (argptr, char *) ;
size = strlen (strptr) + 1 ;
size += (size & 1) ;
longdata = H2BE_INT (size) ;
put_int (psf, longdata) ;
memcpy (&(psf->header [psf->headindex]), strptr, size) ;
psf->headindex += size ;
break ;
default : break ;
} ;
} ;
va_end(argptr);
return ;
} /* psf_hprintf */
/*-----------------------------------------------------------------------------------------------
*/
void psf_hsetf (SF_PRIVATE *psf, unsigned int marker, char *format, ...)
{ va_list argptr ;
unsigned int longdata, oldheadindex ;
unsigned short worddata ;
void *bindata ;
size_t size ;
char c, *strptr ;
/* Save old head index. */
oldheadindex = psf->headindex ;
psf->headindex = 0 ;
/* Find the marker. */
while (psf->headindex < oldheadindex)
{ if (*((unsigned int*) &(psf->header[psf->headindex])) == marker)
break ;
psf->headindex += 4 ;
} ;
/* If not found return. */
if (psf->headindex >= oldheadindex)
return ;
/* Move past marker. */
psf->headindex += 4 ;
va_start(argptr, format);
while ((c = *format++))
{ switch (c)
{ case 'm' :
longdata = va_arg (argptr, unsigned int) ;
put_int (psf, longdata) ;
break ;
case 'l' :
longdata = va_arg (argptr, unsigned int) ;
longdata = H2LE_INT (longdata) ;
put_int (psf, longdata) ;
break ;
case 'L' :
longdata = va_arg (argptr, unsigned int) ;
longdata = H2BE_INT (longdata) ;
put_int (psf, longdata) ;
break ;
case 'w' :
worddata = va_arg (argptr, int) & 0xFFFF ;
worddata = H2LE_SHORT (worddata) ;
put_short (psf, worddata) ;
break ;
case 'W' :
worddata = va_arg (argptr, int) & 0xFFFF ;
worddata = H2BE_SHORT (worddata) ;
put_short (psf, worddata) ;
break ;
case 'b' :
bindata = va_arg (argptr, void *) ;
size = va_arg (argptr, size_t) ;
memcpy (&(psf->header [psf->headindex]), bindata, size) ;
psf->headindex += size ;
break ;
case 's' :
strptr = va_arg (argptr, char *) ;
size = strlen (strptr) + 1 ;
size += (size & 1) ;
longdata = H2LE_INT (size) ;
put_int (psf, longdata) ;
memcpy (&(psf->header [psf->headindex]), strptr, size) ;
psf->headindex += size ;
break ;
case 'S' :
strptr = va_arg (argptr, char *) ;
size = strlen (strptr) + 1 ;
size += (size & 1) ;
longdata = H2BE_INT (size) ;
put_int (psf, longdata) ;
memcpy (&(psf->header [psf->headindex]), strptr, size) ;
psf->headindex += size ;
break ;
default : break ;
} ;
} ;
va_end(argptr);
psf->headindex = oldheadindex ;
return ;
} /* psf_hsetf */