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freetype/src/gxvalid/gxvcommn.h

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Add gxvalid module to validate TrueType GX/AAT tables. Modifications on existing files: * Jamfile: Register gxvalid module. * src/base/Jamfile: Register ftgxval.c. * src/base/rule.mk: Register ftgxval.c. * docs/INSTALL.ANY: Register gxvalid/gxvalid.c. * include/freetype/config/ftheader.h: Add macro to include gxvalid header file, FT_GX_VALIDATE_H. * include/freetype/config/ftmodule.h: Register gxv_module_class. * include/freetype/ftchapters.h: Add comment about gx_validation. * include/freetype/ftotval.h: Change keyword FT_VALIDATE_XXX to FT_VALIDATE_OTXXX to co-exist gxvalid. * include/freetype/tttags.h: Add tag for TrueType GX/AAT tables. * include/freetype/internal/ftserv.h: Add macro to use gxvalid service, FT_SERVICE_GX_VALIDATE_H * include/freetype/internal/fttrace.h: Add trace facilities for gxvalid. New files on existing directories: * include/freetype/internal/services/svgxval.h: Registration of validation service for TrueType GX/AAT and classic kern table. * include/freetype/ftgxval.h: Public API definition to use gxvalid. * src/base/ftgxval.c: Public API of gxvalid. New files under src/gxvalid/: * src/gxvalid/Jamfile src/gxvalid/README src/gxvalid/module.mk src/gxvalid/rules.mk src/gxvalid/gxvalid.c src/gxvalid/gxvalid.h src/gxvalid/gxvbsln.c src/gxvalid/gxvcommn.c src/gxvalid/gxvcommn.h src/gxvalid/gxverror.h src/gxvalid/gxvfeat.c src/gxvalid/gxvfgen.c src/gxvalid/gxvjust.c src/gxvalid/gxvkern.c src/gxvalid/gxvlcar.c src/gxvalid/gxvmod.c src/gxvalid/gxvmod.h src/gxvalid/gxvmort.c src/gxvalid/gxvmort.h src/gxvalid/gxvmort0.c src/gxvalid/gxvmort1.c src/gxvalid/gxvmort2.c src/gxvalid/gxvmort4.c src/gxvalid/gxvmort5.c src/gxvalid/gxvmorx.c src/gxvalid/gxvmorx.h src/gxvalid/gxvmorx0.c src/gxvalid/gxvmorx1.c src/gxvalid/gxvmorx2.c src/gxvalid/gxvmorx4.c src/gxvalid/gxvmorx5.c src/gxvalid/gxvopbd.c src/gxvalid/gxvprop.c src/gxvalid/gxvtrak.c: New files, gxvalid body.
2005-08-24 06:31:31 +02:00
/***************************************************************************/
/* */
/* gxvcommn.h */
/* */
/* TrueTypeGX/AAT common tables validation (specification). */
/* */
/* Copyright 2004, 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
/* 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. */
/* */
/***************************************************************************/
/***************************************************************************/
/* gxvalid is derived from both gxlayout module and otvalid module. */
/* Development of gxlayout was support of Information-technology Promotion */
/* Agency(IPA), Japan. */
/***************************************************************************/
/*
* keywords in variable naming
* ---------------------------
* table: FT_Bytes typed, pointing the start of this table/subtable.
* limit: FT_Bytes typed, pointing the end of this table/subtable
* including padding for alignment.
* offset: FT_UInt typed, the number of octets from the start to target.
* length: FT_UInt typed, the number of octets from the start to the end.
* in this table/subtable, including padding for alignment.
*
* _MIN, _MAX: should be added to the tail of macros, as INT_MIN etc.
*/
#ifndef __GXVCOMMN_H__
#define __GXVCOMMN_H__
#include <ft2build.h>
#include "gxvalid.h"
#include FT_INTERNAL_DEBUG_H
#include FT_SFNT_NAMES_H
FT_BEGIN_HEADER
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** VALIDATION *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
typedef struct GXV_ValidatorRec_* GXV_Validator;
#define DUMMY_LIMIT 0
typedef void (*GXV_Validate_Func)( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid );
/* ====================== LookupTable Validator ======================== */
typedef union GXV_LookupValueDesc_
{
FT_UShort u;
FT_Short s;
} GXV_LookupValueDesc;
typedef enum GXV_LookupValue_SignSpec_
{
GXV_LOOKUPVALUE_UNSIGNED = 0,
GXV_LOOKUPVALUE_SIGNED
} GXV_LookupValue_SignSpec;
typedef void (*GXV_Lookup_Value_Validate_Func)( FT_UShort glyph,
GXV_LookupValueDesc value,
GXV_Validator valid );
typedef GXV_LookupValueDesc (*GXV_Lookup_Fmt4_Transit_Func)
( FT_UShort relative_gindex,
GXV_LookupValueDesc base_value,
FT_Bytes lookuptbl_limit,
GXV_Validator valid );
/* ====================== StateTable Validator ========================= */
typedef enum GXV_GlyphOffset_Format_
{
GXV_GLYPHOFFSET_NONE = -1,
GXV_GLYPHOFFSET_UCHAR = 2,
GXV_GLYPHOFFSET_CHAR,
GXV_GLYPHOFFSET_USHORT = 4,
GXV_GLYPHOFFSET_SHORT,
GXV_GLYPHOFFSET_ULONG = 8,
GXV_GLYPHOFFSET_LONG
} GXV_GlyphOffset_Format;
#define GXV_GLYPHOFFSET_FMT( table ) \
( valid-> table . entry_glyphoffset_fmt )
#define GXV_GLYPHOFFSET_SIZE( table ) \
( ( valid-> table . entry_glyphoffset_fmt ) / 2 )
/* ----------------------- 16bit StateTable ---------------------------- */
typedef union GXV_StateTable_GlyphOffsetDesc_
{
FT_Byte uc;
FT_UShort u; /* same with GXV_LookupValueDesc */
FT_ULong ul;
FT_Char c;
FT_Short s; /* same with GXV_LookupValueDesc */
FT_Long l;
} GXV_StateTable_GlyphOffsetDesc;
typedef void (*GXV_StateTable_Subtable_Setup_Func)( FT_UShort table_size,
FT_UShort classTable,
FT_UShort stateArray,
FT_UShort entryTable,
FT_UShort* classTable_length_p,
FT_UShort* stateArray_length_p,
FT_UShort* entryTable_length_p,
GXV_Validator valid );
typedef void (*GXV_StateTable_Entry_Validate_Func)( FT_Byte state,
FT_UShort flags,
GXV_StateTable_GlyphOffsetDesc glyphOffset,
FT_Bytes statetable_table,
FT_Bytes statetable_limit,
GXV_Validator valid );
typedef void (*GXV_StateTable_OptData_Load_Func)( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid );
typedef struct GXV_StateTable_ValidatorRec_
{
GXV_GlyphOffset_Format entry_glyphoffset_fmt;
void* optdata;
GXV_StateTable_Subtable_Setup_Func
subtable_setup_func;
GXV_StateTable_Entry_Validate_Func
entry_validate_func;
GXV_StateTable_OptData_Load_Func
optdata_load_func;
} GXV_StateTable_ValidatorRec, *GXV_StateTable_ValidatorRecData;
/* ---------------------- 32bit XStateTable ---------------------------- */
typedef GXV_StateTable_GlyphOffsetDesc GXV_XStateTable_GlyphOffsetDesc;
typedef void (*GXV_XStateTable_Subtable_Setup_Func)( FT_ULong table_size,
FT_ULong classTable,
FT_ULong stateArray,
FT_ULong entryTable,
FT_ULong* classTable_length_p,
FT_ULong* stateArray_length_p,
FT_ULong* entryTable_length_p,
GXV_Validator valid );
typedef void (*GXV_XStateTable_Entry_Validate_Func)( FT_UShort state,
FT_UShort flags,
GXV_StateTable_GlyphOffsetDesc
glyphOffset,
FT_Bytes xstatetable_table,
FT_Bytes xstatetable_limit,
GXV_Validator valid );
typedef GXV_StateTable_OptData_Load_Func GXV_XStateTable_OptData_Load_Func;
typedef struct GXV_XStateTable_ValidatorRec_
{
int entry_glyphoffset_fmt;
void* optdata;
GXV_XStateTable_Subtable_Setup_Func
subtable_setup_func;
GXV_XStateTable_Entry_Validate_Func
entry_validate_func;
GXV_XStateTable_OptData_Load_Func
optdata_load_func;
FT_ULong nClasses;
FT_UShort maxClassID;
} GXV_XStateTable_ValidatorRec, *GXV_XStateTable_ValidatorRecData;
/* ===================================================================== */
typedef struct GXV_ValidatorRec_
{
FT_Validator root;
FT_Face face;
void* table_data;
FT_ULong subtable_length;
GXV_LookupValue_SignSpec lookupval_sign;
GXV_Lookup_Value_Validate_Func lookupval_func;
GXV_Lookup_Fmt4_Transit_Func lookupfmt4_trans;
FT_Bytes lookuptbl_head;
GXV_StateTable_ValidatorRec statetable;
GXV_XStateTable_ValidatorRec xstatetable;
#ifdef FT_DEBUG_LEVEL_TRACE
FT_UInt debug_indent;
const FT_String* debug_function_name[3];
#endif
} GXV_ValidatorRec;
#define GXV_TABLE_DATA( tag, field ) \
( ( (GXV_ ## tag ## _Data)valid->table_data )->field )
#undef FT_INVALID_
#define FT_INVALID_( _prefix, _error ) \
ft_validator_error( valid->root, _prefix ## _error )
#define GXV_LIMIT_CHECK( _count ) \
FT_BEGIN_STMNT \
if ( p + _count > ( limit? limit : valid->root->limit ) ) \
FT_INVALID_TOO_SHORT; \
FT_END_STMNT
#ifdef FT_DEBUG_LEVEL_TRACE
#define GXV_INIT valid->debug_indent = 0
#define GXV_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 GXV_EXIT valid->debug_indent -= 2
#define GXV_TRACE( s ) \
FT_BEGIN_STMNT \
FT_TRACE4(( "%*.s", valid->debug_indent, 0 )); \
FT_TRACE4( s ); \
FT_END_STMNT
#else /* !FT_DEBUG_LEVEL_TRACE */
#define GXV_INIT do ; while ( 0 )
#define GXV_NAME_ENTER( name ) do ; while ( 0 )
#define GXV_EXIT do ; while ( 0 )
#define GXV_TRACE( s ) do ; while ( 0 )
#endif /* !FT_DEBUG_LEVEL_TRACE */
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** 32bit alignment checking *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
#define GXV_32BIT_ALIGNMENT_VALIDATE( a ) \
FT_BEGIN_STMNT \
{ \
if ( 0 != ( (a) % 4 ) ) FT_INVALID_OFFSET ; \
} \
FT_END_STMNT
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** Dumping Binary Data *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
#define GXV_TRACE_HEXDUMP( p, len ) \
FT_BEGIN_STMNT \
{ \
FT_Bytes b; \
for (b = p; b < (FT_Bytes)p + len; b++) \
FT_TRACE1(("\\x%02x", *b)) ; \
} \
FT_END_STMNT
#define GXV_TRACE_HEXDUMP_C( p, len ) \
FT_BEGIN_STMNT \
{ \
FT_Bytes b; \
for (b = p; b < (FT_Bytes)p + len; b++) \
if (0x40 < *b && *b < 0x7e) \
FT_TRACE1(("%c", *b)) ; \
else \
FT_TRACE1(("\\x%02x", *b)) ; \
} \
FT_END_STMNT
#define GXV_TRACE_HEXDUMP_SFNTNAME( n ) GXV_TRACE_HEXDUMP( n.string, n.string_len )
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** LOOKUP TABLE *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
gxv_BinSrchHeader_validate( FT_Bytes p,
FT_Bytes limit,
FT_UShort* unitSize_p,
FT_UShort* nUnits_p,
GXV_Validator valid );
FT_LOCAL( void )
gxv_LookupTable_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** Glyph ID *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( FT_Int )
gxv_glyphid_validate( FT_UShort gid,
GXV_Validator valid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** CONTROL POINT *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
gxv_ctlPoint_validate( FT_UShort gid,
FT_Short ctl_point,
GXV_Validator valid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** SFNT NAME *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
gxv_sfntName_validate( FT_UShort name_index,
FT_UShort min_index,
FT_UShort max_index,
GXV_Validator valid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** STATE TABLE *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL( void )
gxv_StateTable_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid );
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** UTILITY MACRO *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
#define GXV_SUBTABLE_OFFSET_CHECK( _offset ) \
FT_BEGIN_STMNT \
if ( (_offset) > valid->subtable_length ) \
FT_INVALID_OFFSET; \
FT_END_STMNT
#define GXV_SUBTABLE_LIMIT_CHECK( _count ) \
FT_BEGIN_STMNT \
if ( ( p + (_count) - valid->subtable_start ) > valid->subtable_length ) \
FT_INVALID_TOO_SHORT; \
FT_END_STMNT
#define GXV_USHORT_TO_SHORT( _us ) \
( ( 0x8000 < ( _us ) ) ? ( ( _us ) - 0x8000 ) : ( _us ) )
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** Table overlapping *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
typedef struct GXV_odtect_DataRec_
{
FT_Bytes start;
FT_ULong length;
FT_String* name;
} GXV_odtect_DataRec, *GXV_odtect_Data;
typedef struct GXV_odtect_RangeRec_
{
FT_UInt nRanges;
GXV_odtect_Data range;
} GXV_odtect_RangeRec, *GXV_odtect_Range;
#define GXV_ODTECT( n, odtect ) \
GXV_odtect_DataRec odtect ## _range[ n ]; \
GXV_odtect_RangeRec odtect ## _rec = { 0, NULL }; \
GXV_odtect_Range odtect = NULL
#define GXV_ODTECT_INIT( odtect ) \
FT_BEGIN_STMNT \
odtect ## _rec.nRanges = 0; \
odtect ## _rec.range = odtect ## _range; \
odtect = & odtect ## _rec; \
FT_END_STMNT
/* */
FT_END_HEADER
#endif /* Not def: __GXVCOMMN_H__ */
/* END */
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