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freetype/src/otvalid/otvcommn.h

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Adding OpenType validation module. The code is based on the (unfinished) `otlayout' module but has been heavily modified to make it much more compact. * src/otvalid/*: New module. * include/freetype/ftotval.h, src/base/ftotval.c, include/freetype/internal/services/svotval.h: New files. * include/freetype/config/ftmodule.h: Add otv_module_class. * include/freetype/config/ftheader.h (FT_OPENTYPE_VALIDATE_H): New macro. * include/freetype/internal/ftserv.h (FT_SERVICE_OPENTYPE_VALIDATE_H): New macro. * include/freetype/internal/fttrace.h (otvmodule, otvcommon, otvbase, otvgdef, otvgpos, otvgsub, otvjstf): New trace components. * include/freetype/ftchapters.h: Updated. * src/base/Jamfile (Library), src/base/descrip.mms (OBJS), src/base/rules.mk (BASE_EXT_SRC): Updated. * docs/CHANGES: Updated.
2004-09-10 16:39:00 +02:00
/***************************************************************************/
/* */
/* otvcommn.h */
/* */
/* OpenType common tables validation (specification). */
/* */
/* Copyright 2004 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 <ft2build.h>
#include "otvalid.h"
#include FT_INTERNAL_DEBUG_H
FT_BEGIN_HEADER
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** VALIDATION *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
typedef struct OTV_ValidatorRec_* OTV_Validator;
typedef void (*OTV_Validate_Func)( FT_Bytes table,
OTV_Validator valid );
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_( _prefix, _error ) \
ft_validator_error( valid->root, _prefix ## _error )
#define OTV_OPTIONAL_TABLE( _table ) FT_UInt _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_LIMIT_CHECK( _count ) \
FT_BEGIN_STMNT \
if ( p + (_count) > valid->root->limit ) \
FT_INVALID_TOO_SHORT; \
FT_END_STMNT
#define OTV_SIZE_CHECK( _size ) \
FT_BEGIN_STMNT \
if ( _size > 0 && _size < table_size ) \
{ \
if ( valid->root->level == FT_VALIDATE_PARANOID ) \
FT_INVALID_OFFSET; \
else \
{ \
/* strip off `const' */ \
FT_Byte* pp = (FT_Byte*)_size ## _p; \
\
\
FT_TRACE3(( "\n" \
"Invalid offset to optional table `%s'!\n" \
"Set to zero.\n" \
"\n", #_size )); \
\
/* always assume 16bit entities */ \
_size = pp[0] = pp[1] = 0; \
} \
} \
FT_END_STMNT
#ifdef FT_DEBUG_LEVEL_TRACE
/* use preprocessor's argument prescan to expand one argument into two */
#define OTV_NEST1( x ) OTV_NEST1_( x )
#define OTV_NEST1_( func0, name0 ) \
FT_BEGIN_STMNT \
valid->nesting_level = 0; \
valid->func[0] = func0; \
valid->debug_function_name[0] = name0; \
FT_END_STMNT
/* use preprocessor's argument prescan to expand two arguments into four */
#define OTV_NEST2( x, y ) OTV_NEST2_( x, y )
#define OTV_NEST2_( func0, name0, func1, name1 ) \
FT_BEGIN_STMNT \
valid->nesting_level = 0; \
valid->func[0] = func0; \
valid->func[1] = func1; \
valid->debug_function_name[0] = name0; \
valid->debug_function_name[1] = name1; \
FT_END_STMNT
/* use preprocessor's argument prescan to expand three arguments into six */
#define OTV_NEST3( x, y, z ) OTV_NEST3_( x, y, z )
#define OTV_NEST3_( func0, name0, func1, name1, func2, name2 ) \
FT_BEGIN_STMNT \
valid->nesting_level = 0; \
valid->func[0] = func0; \
valid->func[1] = func1; \
valid->func[2] = func2; \
valid->debug_function_name[0] = name0; \
valid->debug_function_name[1] = name1; \
valid->debug_function_name[2] = name2; \
FT_END_STMNT
#define OTV_INIT valid->debug_indent = 0
#define OTV_ENTER \
FT_BEGIN_STMNT \
valid->debug_indent += 2; \
FT_TRACE4(( "%*.s", valid->debug_indent, 0 )); \
FT_TRACE4(( "%s table\n", \
valid->debug_function_name[valid->nesting_level] )); \
FT_END_STMNT
#define OTV_NAME_ENTER( name ) \
FT_BEGIN_STMNT \
valid->debug_indent += 2; \
FT_TRACE4(( "%*.s", valid->debug_indent, 0 )); \
FT_TRACE4(( "%s table\n", name )); \
FT_END_STMNT
#define OTV_EXIT valid->debug_indent -= 2
#define OTV_TRACE( s ) \
FT_BEGIN_STMNT \
FT_TRACE4(( "%*.s", valid->debug_indent, 0 )); \
FT_TRACE4( s ); \
FT_END_STMNT
#else /* !FT_DEBUG_LEVEL_TRACE */
/* use preprocessor's argument prescan to expand one argument into two */
#define OTV_NEST1( x ) OTV_NEST1_( x )
#define OTV_NEST1_( func0, name0 ) \
FT_BEGIN_STMNT \
valid->nesting_level = 0; \
valid->func[0] = func0; \
FT_END_STMNT
/* use preprocessor's argument prescan to expand two arguments into four */
#define OTV_NEST2( x, y ) OTV_NEST2_( x, y )
#define OTV_NEST2_( func0, name0, func1, name1 ) \
FT_BEGIN_STMNT \
valid->nesting_level = 0; \
valid->func[0] = func0; \
valid->func[1] = func1; \
FT_END_STMNT
/* use preprocessor's argument prescan to expand three arguments into six */
#define OTV_NEST3( x, y, z ) OTV_NEST3_( x, y, z )
#define OTV_NEST3_( func0, name0, func1, name1, func2, name2 ) \
FT_BEGIN_STMNT \
valid->nesting_level = 0; \
valid->func[0] = func0; \
valid->func[1] = func1; \
valid->func[2] = func2; \
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 valid->func[0]
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** COVERAGE TABLE *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
otv_Coverage_validate( FT_Bytes table,
OTV_Validator valid );
/* 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 valid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** DEVICE TABLE *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
otv_Device_validate( FT_Bytes table,
OTV_Validator valid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** LOOKUPS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
otv_Lookup_validate( FT_Bytes table,
OTV_Validator valid );
FT_LOCAL( void )
otv_LookupList_validate( FT_Bytes table,
OTV_Validator valid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** FEATURES *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
otv_Feature_validate( FT_Bytes table,
OTV_Validator valid );
/* lookups must already be validated */
FT_LOCAL( void )
otv_FeatureList_validate( FT_Bytes table,
FT_Bytes lookups,
OTV_Validator valid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** LANGUAGE SYSTEM *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
otv_LangSys_validate( FT_Bytes table,
OTV_Validator valid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** SCRIPTS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
otv_Script_validate( FT_Bytes table,
OTV_Validator valid );
/* features must already be validated */
FT_LOCAL( void )
otv_ScriptList_validate( FT_Bytes table,
FT_Bytes features,
OTV_Validator valid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** UTILITY FUNCTIONS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
#define ChainPosClassSet otv_x_Ox, "ChainPosClassSet"
#define ChainPosRuleSet otv_x_Ox, "ChainPosRuleSet"
#define ChainSubClassSet otv_x_Ox, "ChainSubClassSet"
#define ChainSubRuleSet otv_x_Ox, "ChainSubRuleSet"
#define JstfLangSys otv_x_Ox, "JstfLangSys"
#define JstfMax otv_x_Ox, "JstfMax"
#define LigGlyph otv_x_Ox, "LigGlyph"
#define LigatureArray otv_x_Ox, "LigatureArray"
#define LigatureSet otv_x_Ox, "LigatureSet"
#define PosClassSet otv_x_Ox, "PosClassSet"
#define PosRuleSet otv_x_Ox, "PosRuleSet"
#define SubClassSet otv_x_Ox, "SubClassSet"
#define SubRuleSet otv_x_Ox, "SubRuleSet"
FT_LOCAL( void )
otv_x_Ox ( FT_Bytes table,
OTV_Validator valid );
#define AlternateSubstFormat1 otv_u_C_x_Ox, "AlternateSubstFormat1"
#define ChainContextPosFormat1 otv_u_C_x_Ox, "ChainContextPosFormat1"
#define ChainContextSubstFormat1 otv_u_C_x_Ox, "ChainContextSubstFormat1"
#define ContextPosFormat1 otv_u_C_x_Ox, "ContextPosFormat1"
#define ContextSubstFormat1 otv_u_C_x_Ox, "ContextSubstFormat1"
#define LigatureSubstFormat1 otv_u_C_x_Ox, "LigatureSubstFormat1"
#define MultipleSubstFormat1 otv_u_C_x_Ox, "MultipleSubstFormat1"
FT_LOCAL( void )
otv_u_C_x_Ox( FT_Bytes table,
OTV_Validator valid );
#define AlternateSet otv_x_ux, "AlternateSet"
#define AttachPoint otv_x_ux, "AttachPoint"
#define ExtenderGlyph otv_x_ux, "ExtenderGlyph"
#define JstfGPOSModList otv_x_ux, "JstfGPOSModList"
#define JstfGSUBModList otv_x_ux, "JstfGSUBModList"
#define Sequence otv_x_ux, "Sequence"
FT_LOCAL( void )
otv_x_ux( FT_Bytes table,
OTV_Validator valid );
#define PosClassRule otv_x_y_ux_sy, "PosClassRule"
#define PosRule otv_x_y_ux_sy, "PosRule"
#define SubClassRule otv_x_y_ux_sy, "SubClassRule"
#define SubRule otv_x_y_ux_sy, "SubRule"
FT_LOCAL( void )
otv_x_y_ux_sy( FT_Bytes table,
OTV_Validator valid );
#define ChainPosClassRule otv_x_ux_y_uy_z_uz_p_sp, "ChainPosClassRule"
#define ChainPosRule otv_x_ux_y_uy_z_uz_p_sp, "ChainPosRule"
#define ChainSubClassRule otv_x_ux_y_uy_z_uz_p_sp, "ChainSubClassRule"
#define ChainSubRule otv_x_ux_y_uy_z_uz_p_sp, "ChainSubRule"
FT_LOCAL( void )
otv_x_ux_y_uy_z_uz_p_sp( FT_Bytes table,
OTV_Validator valid );
#define ContextPosFormat2 otv_u_O_O_x_Onx, "ContextPosFormat2"
#define ContextSubstFormat2 otv_u_O_O_x_Onx, "ContextSubstFormat2"
FT_LOCAL( void )
otv_u_O_O_x_Onx( FT_Bytes table,
OTV_Validator valid );
#define ContextPosFormat3 otv_u_x_y_Ox_sy, "ContextPosFormat3"
#define ContextSubstFormat3 otv_u_x_y_Ox_sy, "ContextSubstFormat3"
FT_LOCAL( void )
otv_u_x_y_Ox_sy( FT_Bytes table,
OTV_Validator valid );
#define ChainContextPosFormat2 otv_u_O_O_O_O_x_Onx, "ChainContextPosFormat2"
#define ChainContextSubstFormat2 otv_u_O_O_O_O_x_Onx, "ChainContextSubstFormat2"
FT_LOCAL( void )
otv_u_O_O_O_O_x_Onx( FT_Bytes table,
OTV_Validator valid );
#define ChainContextPosFormat3 otv_u_x_Ox_y_Oy_z_Oz_p_sp, "ChainContextPosFormat3"
#define ChainContextSubstFormat3 otv_u_x_Ox_y_Oy_z_Oz_p_sp, "ChainContextSubstFormat3"
FT_LOCAL( void )
otv_u_x_Ox_y_Oy_z_Oz_p_sp( FT_Bytes table,
OTV_Validator valid );
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 */
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