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/***************************************************************************/
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/* */
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/* gxvcommn.h */
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/* */
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/* TrueTypeGX/AAT common tables validation (specification). */
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/* */
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/* Copyright 2004, 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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/***************************************************************************/
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/* */
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/* gxvalid is derived from both gxlayout module and otvalid module. */
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/* Development of gxlayout is supported by the Information-technology */
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/* Promotion Agency(IPA), Japan. */
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/* */
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/***************************************************************************/
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/*
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* keywords in variable naming
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* ---------------------------
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* table: Of type FT_Bytes, pointing to the start of this table/subtable.
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* limit: Of type FT_Bytes, pointing to the end of this table/subtable,
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* including padding for alignment.
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* offset: Of type FT_UInt, the number of octets from the start to target.
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* length: Of type FT_UInt, the number of octets from the start to the
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* end in this table/subtable, including padding for alignment.
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*
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* _MIN, _MAX: Should be added to the tail of macros, as INT_MIN, etc.
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*/
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#ifndef __GXVCOMMN_H__
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#define __GXVCOMMN_H__
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#include <ft2build.h>
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#include "gxvalid.h"
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#include FT_INTERNAL_DEBUG_H
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#include FT_SFNT_NAMES_H
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FT_BEGIN_HEADER
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** VALIDATION *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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typedef struct GXV_ValidatorRec_* GXV_Validator;
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#define DUMMY_LIMIT 0
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typedef void
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(*GXV_Validate_Func)( FT_Bytes table,
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FT_Bytes limit,
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GXV_Validator valid );
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/* ====================== LookupTable Validator ======================== */
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typedef union GXV_LookupValueDesc_
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{
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FT_UShort u;
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FT_Short s;
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} GXV_LookupValueDesc;
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typedef const GXV_LookupValueDesc* GXV_LookupValueCPtr;
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typedef enum GXV_LookupValue_SignSpec_
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{
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GXV_LOOKUPVALUE_UNSIGNED = 0,
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GXV_LOOKUPVALUE_SIGNED
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} GXV_LookupValue_SignSpec;
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typedef void
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(*GXV_Lookup_Value_Validate_Func)( FT_UShort glyph,
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GXV_LookupValueCPtr value_p,
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GXV_Validator valid );
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typedef GXV_LookupValueDesc
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(*GXV_Lookup_Fmt4_Transit_Func)( FT_UShort relative_gindex,
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GXV_LookupValueCPtr base_value_p,
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FT_Bytes lookuptbl_limit,
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GXV_Validator valid );
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/* ====================== StateTable Validator ========================= */
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typedef enum GXV_GlyphOffset_Format_
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{
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GXV_GLYPHOFFSET_NONE = -1,
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GXV_GLYPHOFFSET_UCHAR = 2,
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GXV_GLYPHOFFSET_CHAR,
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GXV_GLYPHOFFSET_USHORT = 4,
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GXV_GLYPHOFFSET_SHORT,
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GXV_GLYPHOFFSET_ULONG = 8,
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GXV_GLYPHOFFSET_LONG
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} GXV_GlyphOffset_Format;
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#define GXV_GLYPHOFFSET_FMT( table ) \
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( valid->table.entry_glyphoffset_fmt )
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#define GXV_GLYPHOFFSET_SIZE( table ) \
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( valid->table.entry_glyphoffset_fmt / 2 )
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/* ----------------------- 16bit StateTable ---------------------------- */
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typedef union GXV_StateTable_GlyphOffsetDesc_
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{
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FT_Byte uc;
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FT_UShort u; /* same as GXV_LookupValueDesc */
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FT_ULong ul;
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FT_Char c;
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FT_Short s; /* same as GXV_LookupValueDesc */
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FT_Long l;
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} GXV_StateTable_GlyphOffsetDesc;
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typedef const GXV_StateTable_GlyphOffsetDesc* GXV_StateTable_GlyphOffsetCPtr;
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typedef void
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(*GXV_StateTable_Subtable_Setup_Func)( FT_UShort table_size,
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FT_UShort classTable,
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FT_UShort stateArray,
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FT_UShort entryTable,
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FT_UShort* classTable_length_p,
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FT_UShort* stateArray_length_p,
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FT_UShort* entryTable_length_p,
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GXV_Validator valid );
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typedef void
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(*GXV_StateTable_Entry_Validate_Func)(
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FT_Byte state,
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FT_UShort flags,
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GXV_StateTable_GlyphOffsetCPtr glyphOffset_p,
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FT_Bytes statetable_table,
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FT_Bytes statetable_limit,
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GXV_Validator valid );
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typedef void
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(*GXV_StateTable_OptData_Load_Func)( FT_Bytes table,
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FT_Bytes limit,
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GXV_Validator valid );
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typedef struct GXV_StateTable_ValidatorRec_
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{
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GXV_GlyphOffset_Format entry_glyphoffset_fmt;
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void* optdata;
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GXV_StateTable_Subtable_Setup_Func subtable_setup_func;
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GXV_StateTable_Entry_Validate_Func entry_validate_func;
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GXV_StateTable_OptData_Load_Func optdata_load_func;
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} GXV_StateTable_ValidatorRec, *GXV_StateTable_ValidatorRecData;
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/* ---------------------- 32bit XStateTable ---------------------------- */
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typedef GXV_StateTable_GlyphOffsetDesc GXV_XStateTable_GlyphOffsetDesc;
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typedef const GXV_XStateTable_GlyphOffsetDesc* GXV_XStateTable_GlyphOffsetCPtr;
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typedef void
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(*GXV_XStateTable_Subtable_Setup_Func)( FT_ULong table_size,
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FT_ULong classTable,
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FT_ULong stateArray,
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FT_ULong entryTable,
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FT_ULong* classTable_length_p,
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FT_ULong* stateArray_length_p,
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FT_ULong* entryTable_length_p,
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GXV_Validator valid );
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typedef void
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(*GXV_XStateTable_Entry_Validate_Func)(
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FT_UShort state,
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FT_UShort flags,
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GXV_StateTable_GlyphOffsetCPtr glyphOffset_p,
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FT_Bytes xstatetable_table,
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FT_Bytes xstatetable_limit,
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GXV_Validator valid );
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typedef GXV_StateTable_OptData_Load_Func GXV_XStateTable_OptData_Load_Func;
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typedef struct GXV_XStateTable_ValidatorRec_
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{
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int entry_glyphoffset_fmt;
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void* optdata;
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GXV_XStateTable_Subtable_Setup_Func subtable_setup_func;
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GXV_XStateTable_Entry_Validate_Func entry_validate_func;
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GXV_XStateTable_OptData_Load_Func optdata_load_func;
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FT_ULong nClasses;
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FT_UShort maxClassID;
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} GXV_XStateTable_ValidatorRec, *GXV_XStateTable_ValidatorRecData;
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/* ===================================================================== */
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typedef struct GXV_ValidatorRec_
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{
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FT_Validator root;
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FT_Face face;
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void* table_data;
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FT_ULong subtable_length;
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GXV_LookupValue_SignSpec lookupval_sign;
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GXV_Lookup_Value_Validate_Func lookupval_func;
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GXV_Lookup_Fmt4_Transit_Func lookupfmt4_trans;
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FT_Bytes lookuptbl_head;
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GXV_StateTable_ValidatorRec statetable;
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GXV_XStateTable_ValidatorRec xstatetable;
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#ifdef FT_DEBUG_LEVEL_TRACE
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FT_UInt debug_indent;
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const FT_String* debug_function_name[3];
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#endif
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} GXV_ValidatorRec;
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#define GXV_TABLE_DATA( tag, field ) \
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( ( (GXV_ ## tag ## _Data)valid->table_data )->field )
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#undef FT_INVALID_
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#define FT_INVALID_( _prefix, _error ) \
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ft_validator_error( valid->root, _prefix ## _error )
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#define GXV_LIMIT_CHECK( _count ) \
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FT_BEGIN_STMNT \
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if ( p + _count > ( limit? limit : valid->root->limit ) ) \
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FT_INVALID_TOO_SHORT; \
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FT_END_STMNT
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#ifdef FT_DEBUG_LEVEL_TRACE
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#define GXV_INIT valid->debug_indent = 0
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#define GXV_NAME_ENTER( name ) \
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FT_BEGIN_STMNT \
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valid->debug_indent += 2; \
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FT_TRACE4(( "%*.s", valid->debug_indent, 0 )); \
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FT_TRACE4(( "%s table\n", name )); \
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FT_END_STMNT
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#define GXV_EXIT valid->debug_indent -= 2
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#define GXV_TRACE( s ) \
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FT_BEGIN_STMNT \
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FT_TRACE4(( "%*.s", valid->debug_indent, 0 )); \
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FT_TRACE4( s ); \
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FT_END_STMNT
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#else /* !FT_DEBUG_LEVEL_TRACE */
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#define GXV_INIT do { } while ( 0 )
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#define GXV_NAME_ENTER( name ) do { } while ( 0 )
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#define GXV_EXIT do { } while ( 0 )
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#define GXV_TRACE( s ) do { } while ( 0 )
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#endif /* !FT_DEBUG_LEVEL_TRACE */
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** 32bit alignment checking *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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#define GXV_32BIT_ALIGNMENT_VALIDATE( a ) \
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FT_BEGIN_STMNT \
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{ \
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if ( 0 != ( (a) % 4 ) ) \
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FT_INVALID_OFFSET ; \
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} \
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FT_END_STMNT
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** Dumping Binary Data *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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#define GXV_TRACE_HEXDUMP( p, len ) \
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FT_BEGIN_STMNT \
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{ \
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FT_Bytes b; \
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\
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\
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for ( b = p; b < (FT_Bytes)p + len; b++ ) \
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FT_TRACE1(("\\x%02x", *b)) ; \
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} \
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FT_END_STMNT
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#define GXV_TRACE_HEXDUMP_C( p, len ) \
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FT_BEGIN_STMNT \
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{ \
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FT_Bytes b; \
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\
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\
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for ( b = p; b < (FT_Bytes)p + len; b++ ) \
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if ( 0x40 < *b && *b < 0x7e ) \
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FT_TRACE1(("%c", *b)) ; \
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else \
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FT_TRACE1(("\\x%02x", *b)) ; \
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} \
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FT_END_STMNT
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341 |
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#define GXV_TRACE_HEXDUMP_SFNTNAME( n ) \
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GXV_TRACE_HEXDUMP( n.string, n.string_len )
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344 |
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345 |
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346 |
/*************************************************************************/
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347 |
/*************************************************************************/
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348 |
/***** *****/
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349 |
/***** LOOKUP TABLE *****/
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350 |
/***** *****/
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351 |
/*************************************************************************/
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352 |
/*************************************************************************/
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353 |
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354 |
FT_LOCAL( void )
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gxv_BinSrchHeader_validate( FT_Bytes p,
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FT_Bytes limit,
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FT_UShort* unitSize_p,
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358 |
FT_UShort* nUnits_p,
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359 |
GXV_Validator valid );
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360 |
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361 |
FT_LOCAL( void )
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gxv_LookupTable_validate( FT_Bytes table,
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FT_Bytes limit,
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364 |
GXV_Validator valid );
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365 |
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366 |
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367 |
/*************************************************************************/
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368 |
/*************************************************************************/
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369 |
/***** *****/
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370 |
/***** Glyph ID *****/
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371 |
/***** *****/
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372 |
/*************************************************************************/
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373 |
/*************************************************************************/
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374 |
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375 |
FT_LOCAL( FT_Int )
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gxv_glyphid_validate( FT_UShort gid,
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377 |
GXV_Validator valid );
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378 |
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379 |
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380 |
/*************************************************************************/
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381 |
/*************************************************************************/
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382 |
/***** *****/
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383 |
/***** CONTROL POINT *****/
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384 |
/***** *****/
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|
385 |
/*************************************************************************/
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386 |
/*************************************************************************/
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387 |
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388 |
FT_LOCAL( void )
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389 |
gxv_ctlPoint_validate( FT_UShort gid,
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390 |
FT_Short ctl_point,
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391 |
GXV_Validator valid );
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392 |
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393 |
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394 |
/*************************************************************************/
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395 |
/*************************************************************************/
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|
|
396 |
/***** *****/
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397 |
/***** SFNT NAME *****/
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398 |
/***** *****/
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|
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399 |
/*************************************************************************/
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|
400 |
/*************************************************************************/
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401 |
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|
402 |
FT_LOCAL( void )
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403 |
gxv_sfntName_validate( FT_UShort name_index,
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|
404 |
FT_UShort min_index,
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405 |
FT_UShort max_index,
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406 |
GXV_Validator valid );
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407 |
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408 |
|
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409 |
/*************************************************************************/
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|
|
410 |
/*************************************************************************/
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|
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411 |
/***** *****/
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412 |
/***** STATE TABLE *****/
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|
|
413 |
/***** *****/
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|
|
414 |
/*************************************************************************/
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|
415 |
/*************************************************************************/
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416 |
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417 |
FT_LOCAL( void )
|
|
|
418 |
gxv_StateTable_subtable_setup( FT_UShort table_size,
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419 |
FT_UShort classTable,
|
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|
420 |
FT_UShort stateArray,
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421 |
FT_UShort entryTable,
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|
422 |
FT_UShort* classTable_length_p,
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423 |
FT_UShort* stateArray_length_p,
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424 |
FT_UShort* entryTable_length_p,
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|
425 |
GXV_Validator valid );
|
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426 |
|
|
|
427 |
FT_LOCAL( void )
|
|
|
428 |
gxv_XStateTable_subtable_setup( FT_ULong table_size,
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|
|
429 |
FT_ULong classTable,
|
|
|
430 |
FT_ULong stateArray,
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|
431 |
FT_ULong entryTable,
|
|
|
432 |
FT_ULong* classTable_length_p,
|
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|
433 |
FT_ULong* stateArray_length_p,
|
|
|
434 |
FT_ULong* entryTable_length_p,
|
|
|
435 |
GXV_Validator valid );
|
|
|
436 |
|
|
|
437 |
FT_LOCAL( void )
|
|
|
438 |
gxv_StateTable_validate( FT_Bytes table,
|
|
|
439 |
FT_Bytes limit,
|
|
|
440 |
GXV_Validator valid );
|
|
|
441 |
|
|
|
442 |
FT_LOCAL( void )
|
|
|
443 |
gxv_XStateTable_validate( FT_Bytes table,
|
|
|
444 |
FT_Bytes limit,
|
|
|
445 |
GXV_Validator valid );
|
|
|
446 |
|
|
|
447 |
|
|
|
448 |
/*************************************************************************/
|
|
|
449 |
/*************************************************************************/
|
|
|
450 |
/***** *****/
|
|
|
451 |
/***** UTILITY MACROS AND FUNCTIONS *****/
|
|
|
452 |
/***** *****/
|
|
|
453 |
/*************************************************************************/
|
|
|
454 |
/*************************************************************************/
|
|
|
455 |
|
|
|
456 |
FT_LOCAL( void )
|
|
|
457 |
gxv_array_getlimits_byte( FT_Bytes table,
|
|
|
458 |
FT_Bytes limit,
|
|
|
459 |
FT_Byte* min,
|
|
|
460 |
FT_Byte* max,
|
|
|
461 |
GXV_Validator valid );
|
|
|
462 |
|
|
|
463 |
FT_LOCAL( void )
|
|
|
464 |
gxv_array_getlimits_ushort( FT_Bytes table,
|
|
|
465 |
FT_Bytes limit,
|
|
|
466 |
FT_UShort* min,
|
|
|
467 |
FT_UShort* max,
|
|
|
468 |
GXV_Validator valid );
|
|
|
469 |
|
|
|
470 |
FT_LOCAL( void )
|
|
|
471 |
gxv_set_length_by_ushort_offset( FT_UShort* offset,
|
|
|
472 |
FT_UShort** length,
|
|
|
473 |
FT_UShort* buff,
|
|
|
474 |
FT_UInt nmemb,
|
|
|
475 |
FT_UShort limit,
|
|
|
476 |
GXV_Validator valid );
|
|
|
477 |
|
|
|
478 |
FT_LOCAL( void )
|
|
|
479 |
gxv_set_length_by_ulong_offset( FT_ULong* offset,
|
|
|
480 |
FT_ULong** length,
|
|
|
481 |
FT_ULong* buff,
|
|
|
482 |
FT_UInt nmemb,
|
|
|
483 |
FT_ULong limit,
|
|
|
484 |
GXV_Validator valid);
|
|
|
485 |
|
|
|
486 |
|
|
|
487 |
#define GXV_SUBTABLE_OFFSET_CHECK( _offset ) \
|
|
|
488 |
FT_BEGIN_STMNT \
|
|
|
489 |
if ( (_offset) > valid->subtable_length ) \
|
|
|
490 |
FT_INVALID_OFFSET; \
|
|
|
491 |
FT_END_STMNT
|
|
|
492 |
|
|
|
493 |
#define GXV_SUBTABLE_LIMIT_CHECK( _count ) \
|
|
|
494 |
FT_BEGIN_STMNT \
|
|
|
495 |
if ( ( p + (_count) - valid->subtable_start ) > \
|
|
|
496 |
valid->subtable_length ) \
|
|
|
497 |
FT_INVALID_TOO_SHORT; \
|
|
|
498 |
FT_END_STMNT
|
|
|
499 |
|
|
|
500 |
#define GXV_USHORT_TO_SHORT( _us ) \
|
|
|
501 |
( ( 0x8000U < ( _us ) ) ? ( ( _us ) - 0x8000U ) : ( _us ) )
|
|
|
502 |
|
|
|
503 |
#define GXV_STATETABLE_HEADER_SIZE ( 2 + 2 + 2 + 2 )
|
|
|
504 |
#define GXV_STATEHEADER_SIZE GXV_STATETABLE_HEADER_SIZE
|
|
|
505 |
|
|
|
506 |
#define GXV_XSTATETABLE_HEADER_SIZE ( 4 + 4 + 4 + 4 )
|
|
|
507 |
#define GXV_XSTATEHEADER_SIZE GXV_XSTATETABLE_HEADER_SIZE
|
|
|
508 |
|
|
|
509 |
|
|
|
510 |
/*************************************************************************/
|
|
|
511 |
/*************************************************************************/
|
|
|
512 |
/***** *****/
|
|
|
513 |
/***** Table overlapping *****/
|
|
|
514 |
/***** *****/
|
|
|
515 |
/*************************************************************************/
|
|
|
516 |
/*************************************************************************/
|
|
|
517 |
|
|
|
518 |
typedef struct GXV_odtect_DataRec_
|
|
|
519 |
{
|
|
|
520 |
FT_Bytes start;
|
|
|
521 |
FT_ULong length;
|
|
|
522 |
FT_String* name;
|
|
|
523 |
|
|
|
524 |
} GXV_odtect_DataRec, *GXV_odtect_Data;
|
|
|
525 |
|
|
|
526 |
typedef struct GXV_odtect_RangeRec_
|
|
|
527 |
{
|
|
|
528 |
FT_UInt nRanges;
|
|
|
529 |
GXV_odtect_Data range;
|
|
|
530 |
|
|
|
531 |
} GXV_odtect_RangeRec, *GXV_odtect_Range;
|
|
|
532 |
|
|
|
533 |
|
|
|
534 |
FT_LOCAL( void )
|
|
|
535 |
gxv_odtect_add_range( FT_Bytes start,
|
|
|
536 |
FT_ULong length,
|
|
|
537 |
const FT_String* name,
|
|
|
538 |
GXV_odtect_Range odtect );
|
|
|
539 |
|
|
|
540 |
FT_LOCAL( void )
|
|
|
541 |
gxv_odtect_validate( GXV_odtect_Range odtect,
|
|
|
542 |
GXV_Validator valid );
|
|
|
543 |
|
|
|
544 |
|
|
|
545 |
#define GXV_ODTECT( n, odtect ) \
|
|
|
546 |
GXV_odtect_DataRec odtect ## _range[n]; \
|
|
|
547 |
GXV_odtect_RangeRec odtect ## _rec = { 0, NULL }; \
|
|
|
548 |
GXV_odtect_Range odtect = NULL
|
|
|
549 |
|
|
|
550 |
#define GXV_ODTECT_INIT( odtect ) \
|
|
|
551 |
FT_BEGIN_STMNT \
|
|
|
552 |
odtect ## _rec.nRanges = 0; \
|
|
|
553 |
odtect ## _rec.range = odtect ## _range; \
|
|
|
554 |
odtect = & odtect ## _rec; \
|
|
|
555 |
FT_END_STMNT
|
|
|
556 |
|
|
|
557 |
|
|
|
558 |
/* */
|
|
|
559 |
|
|
|
560 |
FT_END_HEADER
|
|
|
561 |
|
|
|
562 |
#endif /* __GXVCOMMN_H__ */
|
|
|
563 |
|
|
|
564 |
|
|
|
565 |
/* END */
|