ref: 9af1127fbe5639125e34b30b251014baecd52231
dir: /src/otvalid/otvcommn.h/
/****************************************************************************
*
* otvcommn.h
*
* OpenType common tables validation (specification).
*
* Copyright (C) 2004-2022 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used,
* modified, and distributed under the terms of the FreeType project
* license, LICENSE.TXT. By continuing to use, modify, or distribute
* this file you indicate that you have read the license and
* understand and accept it fully.
*
*/
#ifndef OTVCOMMN_H_
#define OTVCOMMN_H_
#include "otvalid.h"
#include <freetype/internal/ftdebug.h>
FT_BEGIN_HEADER
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** VALIDATION *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
typedef struct OTV_ValidatorRec_* OTV_Validator;
typedef void (*OTV_Validate_Func)( FT_Bytes table,
OTV_Validator otvalid );
typedef struct OTV_ValidatorRec_
{
FT_Validator root;
FT_UInt type_count;
OTV_Validate_Func* type_funcs;
FT_UInt lookup_count;
FT_UInt glyph_count;
FT_UInt nesting_level;
OTV_Validate_Func func[3];
FT_UInt extra1; /* for passing parameters */
FT_UInt extra2;
FT_Bytes extra3;
#ifdef FT_DEBUG_LEVEL_TRACE
FT_UInt debug_indent;
const FT_String* debug_function_name[3];
#endif
} OTV_ValidatorRec;
#undef FT_INVALID_
#define FT_INVALID_( _error ) \
ft_validator_error( otvalid->root, FT_THROW( _error ) )
#define OTV_OPTIONAL_TABLE( _table ) FT_UShort _table; \
FT_Bytes _table ## _p
#define OTV_OPTIONAL_TABLE32( _table ) FT_ULong _table; \
FT_Bytes _table ## _p
#define OTV_OPTIONAL_OFFSET( _offset ) \
FT_BEGIN_STMNT \
_offset ## _p = p; \
_offset = FT_NEXT_USHORT( p ); \
FT_END_STMNT
#define OTV_OPTIONAL_OFFSET32( _offset ) \
FT_BEGIN_STMNT \
_offset ## _p = p; \
_offset = FT_NEXT_ULONG( p ); \
FT_END_STMNT
#define OTV_LIMIT_CHECK( _count ) \
FT_BEGIN_STMNT \
if ( p + (_count) > otvalid->root->limit ) \
FT_INVALID_TOO_SHORT; \
FT_END_STMNT
#define OTV_SIZE_CHECK( _size ) \
FT_BEGIN_STMNT \
if ( _size > 0 && _size < table_size ) \
{ \
if ( otvalid->root->level == FT_VALIDATE_PARANOID ) \
FT_INVALID_OFFSET; \
else \
{ \
/* strip off `const' */ \
FT_Byte* pp = (FT_Byte*)_size ## _p; \
\
\
FT_TRACE3(( "\n" )); \
FT_TRACE3(( "Invalid offset to optional table `%s'" \
" set to zero.\n", \
#_size )); \
FT_TRACE3(( "\n" )); \
\
_size = pp[0] = pp[1] = 0; \
} \
} \
FT_END_STMNT
#define OTV_SIZE_CHECK32( _size ) \
FT_BEGIN_STMNT \
if ( _size > 0 && _size < table_size ) \
{ \
if ( otvalid->root->level == FT_VALIDATE_PARANOID ) \
FT_INVALID_OFFSET; \
else \
{ \
/* strip off `const' */ \
FT_Byte* pp = (FT_Byte*)_size ## _p; \
\
\
FT_TRACE3(( "\n" )); \
FT_TRACE3(( "Invalid offset to optional table `%s'" \
" set to zero.\n", \
#_size )); \
FT_TRACE3(( "\n" )); \
\
_size = pp[0] = pp[1] = pp[2] = pp[3] = 0; \
} \
} \
FT_END_STMNT
#define OTV_NAME_(x) #x
#define OTV_NAME(x) OTV_NAME_(x)
#define OTV_FUNC_(x) x##Func
#define OTV_FUNC(x) OTV_FUNC_(x)
#ifdef FT_DEBUG_LEVEL_TRACE
#define OTV_NEST1( x ) \
FT_BEGIN_STMNT \
otvalid->nesting_level = 0; \
otvalid->func[0] = OTV_FUNC( x ); \
otvalid->debug_function_name[0] = OTV_NAME( x ); \
FT_END_STMNT
#define OTV_NEST2( x, y ) \
FT_BEGIN_STMNT \
otvalid->nesting_level = 0; \
otvalid->func[0] = OTV_FUNC( x ); \
otvalid->func[1] = OTV_FUNC( y ); \
otvalid->debug_function_name[0] = OTV_NAME( x ); \
otvalid->debug_function_name[1] = OTV_NAME( y ); \
FT_END_STMNT
#define OTV_NEST3( x, y, z ) \
FT_BEGIN_STMNT \
otvalid->nesting_level = 0; \
otvalid->func[0] = OTV_FUNC( x ); \
otvalid->func[1] = OTV_FUNC( y ); \
otvalid->func[2] = OTV_FUNC( z ); \
otvalid->debug_function_name[0] = OTV_NAME( x ); \
otvalid->debug_function_name[1] = OTV_NAME( y ); \
otvalid->debug_function_name[2] = OTV_NAME( z ); \
FT_END_STMNT
#define OTV_INIT otvalid->debug_indent = 0
#define OTV_ENTER \
FT_BEGIN_STMNT \
otvalid->debug_indent += 2; \
FT_TRACE4(( "%*.s", otvalid->debug_indent, "" )); \
FT_TRACE4(( "%s table\n", \
otvalid->debug_function_name[otvalid->nesting_level] )); \
FT_END_STMNT
#define OTV_NAME_ENTER( name ) \
FT_BEGIN_STMNT \
otvalid->debug_indent += 2; \
FT_TRACE4(( "%*.s", otvalid->debug_indent, "" )); \
FT_TRACE4(( "%s table\n", name )); \
FT_END_STMNT
#define OTV_EXIT otvalid->debug_indent -= 2
#define OTV_TRACE( s ) \
FT_BEGIN_STMNT \
FT_TRACE4(( "%*.s", otvalid->debug_indent, "" )); \
FT_TRACE4( s ); \
FT_END_STMNT
#else /* !FT_DEBUG_LEVEL_TRACE */
#define OTV_NEST1( x ) \
FT_BEGIN_STMNT \
otvalid->nesting_level = 0; \
otvalid->func[0] = OTV_FUNC( x ); \
FT_END_STMNT
#define OTV_NEST2( x, y ) \
FT_BEGIN_STMNT \
otvalid->nesting_level = 0; \
otvalid->func[0] = OTV_FUNC( x ); \
otvalid->func[1] = OTV_FUNC( y ); \
FT_END_STMNT
#define OTV_NEST3( x, y, z ) \
FT_BEGIN_STMNT \
otvalid->nesting_level = 0; \
otvalid->func[0] = OTV_FUNC( x ); \
otvalid->func[1] = OTV_FUNC( y ); \
otvalid->func[2] = OTV_FUNC( z ); \
FT_END_STMNT
#define OTV_INIT do { } while ( 0 )
#define OTV_ENTER do { } while ( 0 )
#define OTV_NAME_ENTER( name ) do { } while ( 0 )
#define OTV_EXIT do { } while ( 0 )
#define OTV_TRACE( s ) do { } while ( 0 )
#endif /* !FT_DEBUG_LEVEL_TRACE */
#define OTV_RUN otvalid->func[0]
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** COVERAGE TABLE *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
otv_Coverage_validate( FT_Bytes table,
OTV_Validator otvalid,
FT_Int expected_count );
/* return first covered glyph */
FT_LOCAL( FT_UInt )
otv_Coverage_get_first( FT_Bytes table );
/* return last covered glyph */
FT_LOCAL( FT_UInt )
otv_Coverage_get_last( FT_Bytes table );
/* return number of covered glyphs */
FT_LOCAL( FT_UInt )
otv_Coverage_get_count( FT_Bytes table );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** CLASS DEFINITION TABLE *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
otv_ClassDef_validate( FT_Bytes table,
OTV_Validator otvalid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** DEVICE TABLE *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
otv_Device_validate( FT_Bytes table,
OTV_Validator otvalid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** LOOKUPS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
otv_Lookup_validate( FT_Bytes table,
OTV_Validator otvalid );
FT_LOCAL( void )
otv_LookupList_validate( FT_Bytes table,
OTV_Validator otvalid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** FEATURES *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
otv_Feature_validate( FT_Bytes table,
OTV_Validator otvalid );
/* lookups must already be validated */
FT_LOCAL( void )
otv_FeatureList_validate( FT_Bytes table,
FT_Bytes lookups,
OTV_Validator otvalid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** LANGUAGE SYSTEM *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
otv_LangSys_validate( FT_Bytes table,
OTV_Validator otvalid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** SCRIPTS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
otv_Script_validate( FT_Bytes table,
OTV_Validator otvalid );
/* features must already be validated */
FT_LOCAL( void )
otv_ScriptList_validate( FT_Bytes table,
FT_Bytes features,
OTV_Validator otvalid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** UTILITY FUNCTIONS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
#define ChainPosClassSetFunc otv_x_Ox
#define ChainPosRuleSetFunc otv_x_Ox
#define ChainSubClassSetFunc otv_x_Ox
#define ChainSubRuleSetFunc otv_x_Ox
#define JstfLangSysFunc otv_x_Ox
#define JstfMaxFunc otv_x_Ox
#define LigGlyphFunc otv_x_Ox
#define LigatureArrayFunc otv_x_Ox
#define LigatureSetFunc otv_x_Ox
#define PosClassSetFunc otv_x_Ox
#define PosRuleSetFunc otv_x_Ox
#define SubClassSetFunc otv_x_Ox
#define SubRuleSetFunc otv_x_Ox
FT_LOCAL( void )
otv_x_Ox ( FT_Bytes table,
OTV_Validator otvalid );
#define AlternateSubstFormat1Func otv_u_C_x_Ox
#define ChainContextPosFormat1Func otv_u_C_x_Ox
#define ChainContextSubstFormat1Func otv_u_C_x_Ox
#define ContextPosFormat1Func otv_u_C_x_Ox
#define ContextSubstFormat1Func otv_u_C_x_Ox
#define LigatureSubstFormat1Func otv_u_C_x_Ox
#define MultipleSubstFormat1Func otv_u_C_x_Ox
FT_LOCAL( void )
otv_u_C_x_Ox( FT_Bytes table,
OTV_Validator otvalid );
#define AlternateSetFunc otv_x_ux
#define AttachPointFunc otv_x_ux
#define ExtenderGlyphFunc otv_x_ux
#define JstfGPOSModListFunc otv_x_ux
#define JstfGSUBModListFunc otv_x_ux
#define SequenceFunc otv_x_ux
FT_LOCAL( void )
otv_x_ux( FT_Bytes table,
OTV_Validator otvalid );
#define PosClassRuleFunc otv_x_y_ux_sy
#define PosRuleFunc otv_x_y_ux_sy
#define SubClassRuleFunc otv_x_y_ux_sy
#define SubRuleFunc otv_x_y_ux_sy
FT_LOCAL( void )
otv_x_y_ux_sy( FT_Bytes table,
OTV_Validator otvalid );
#define ChainPosClassRuleFunc otv_x_ux_y_uy_z_uz_p_sp
#define ChainPosRuleFunc otv_x_ux_y_uy_z_uz_p_sp
#define ChainSubClassRuleFunc otv_x_ux_y_uy_z_uz_p_sp
#define ChainSubRuleFunc otv_x_ux_y_uy_z_uz_p_sp
FT_LOCAL( void )
otv_x_ux_y_uy_z_uz_p_sp( FT_Bytes table,
OTV_Validator otvalid );
#define ContextPosFormat2Func otv_u_O_O_x_Onx
#define ContextSubstFormat2Func otv_u_O_O_x_Onx
FT_LOCAL( void )
otv_u_O_O_x_Onx( FT_Bytes table,
OTV_Validator otvalid );
#define ContextPosFormat3Func otv_u_x_y_Ox_sy
#define ContextSubstFormat3Func otv_u_x_y_Ox_sy
FT_LOCAL( void )
otv_u_x_y_Ox_sy( FT_Bytes table,
OTV_Validator otvalid );
#define ChainContextPosFormat2Func otv_u_O_O_O_O_x_Onx
#define ChainContextSubstFormat2Func otv_u_O_O_O_O_x_Onx
FT_LOCAL( void )
otv_u_O_O_O_O_x_Onx( FT_Bytes table,
OTV_Validator otvalid );
#define ChainContextPosFormat3Func otv_u_x_Ox_y_Oy_z_Oz_p_sp
#define ChainContextSubstFormat3Func otv_u_x_Ox_y_Oy_z_Oz_p_sp
FT_LOCAL( void )
otv_u_x_Ox_y_Oy_z_Oz_p_sp( FT_Bytes table,
OTV_Validator otvalid );
FT_LOCAL( FT_UInt )
otv_GSUBGPOS_get_Lookup_count( FT_Bytes table );
FT_LOCAL( FT_UInt )
otv_GSUBGPOS_have_MarkAttachmentType_flag( FT_Bytes table );
/* */
FT_END_HEADER
#endif /* OTVCOMMN_H_ */
/* END */