--- a/misc/libfreetype/src/otvalid/otvmath.c Fri Oct 11 11:55:31 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,453 +0,0 @@
-/***************************************************************************/
-/* */
-/* otvmath.c */
-/* */
-/* OpenType MATH table validation (body). */
-/* */
-/* Copyright 2007, 2008 by */
-/* David Turner, Robert Wilhelm, and Werner Lemberg. */
-/* */
-/* Written by George Williams. */
-/* */
-/* 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. */
-/* */
-/***************************************************************************/
-
-
-#include "otvalid.h"
-#include "otvcommn.h"
-#include "otvgpos.h"
-
-
- /*************************************************************************/
- /* */
- /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
- /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
- /* messages during execution. */
- /* */
-#undef FT_COMPONENT
-#define FT_COMPONENT trace_otvmath
-
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** MATH TYPOGRAPHIC CONSTANTS *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static void
- otv_MathConstants_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt i;
- FT_UInt table_size;
-
- OTV_OPTIONAL_TABLE( DeviceTableOffset );
-
-
- OTV_NAME_ENTER( "MathConstants" );
-
- /* 56 constants, 51 have device tables */
- OTV_LIMIT_CHECK( 2 * ( 56 + 51 ) );
- table_size = 2 * ( 56 + 51 );
-
- p += 4 * 2; /* First 4 constants have no device tables */
- for ( i = 0; i < 51; ++i )
- {
- p += 2; /* skip the value */
- OTV_OPTIONAL_OFFSET( DeviceTableOffset );
- OTV_SIZE_CHECK( DeviceTableOffset );
- if ( DeviceTableOffset )
- otv_Device_validate( table + DeviceTableOffset, valid );
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** MATH ITALICS CORRECTION *****/
- /***** MATH TOP ACCENT ATTACHMENT *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static void
- otv_MathItalicsCorrectionInfo_validate( FT_Bytes table,
- OTV_Validator valid,
- FT_Int isItalic )
- {
- FT_Bytes p = table;
- FT_UInt i, cnt, table_size ;
-
- OTV_OPTIONAL_TABLE( Coverage );
- OTV_OPTIONAL_TABLE( DeviceTableOffset );
-
- FT_UNUSED( isItalic ); /* only used if tracing is active */
-
-
- OTV_NAME_ENTER( isItalic ? "MathItalicsCorrectionInfo"
- : "MathTopAccentAttachment" );
-
- OTV_LIMIT_CHECK( 4 );
-
- OTV_OPTIONAL_OFFSET( Coverage );
- cnt = FT_NEXT_USHORT( p );
-
- OTV_LIMIT_CHECK( 4 * cnt );
- table_size = 4 + 4 * cnt;
-
- OTV_SIZE_CHECK( Coverage );
- otv_Coverage_validate( table + Coverage, valid, cnt );
-
- for ( i = 0; i < cnt; ++i )
- {
- p += 2; /* Skip the value */
- OTV_OPTIONAL_OFFSET( DeviceTableOffset );
- OTV_SIZE_CHECK( DeviceTableOffset );
- if ( DeviceTableOffset )
- otv_Device_validate( table + DeviceTableOffset, valid );
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** MATH KERNING *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static void
- otv_MathKern_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt i, cnt, table_size;
-
- OTV_OPTIONAL_TABLE( DeviceTableOffset );
-
-
- /* OTV_NAME_ENTER( "MathKern" );*/
-
- OTV_LIMIT_CHECK( 2 );
-
- cnt = FT_NEXT_USHORT( p );
-
- OTV_LIMIT_CHECK( 4 * cnt + 2 );
- table_size = 4 + 4 * cnt;
-
- /* Heights */
- for ( i = 0; i < cnt; ++i )
- {
- p += 2; /* Skip the value */
- OTV_OPTIONAL_OFFSET( DeviceTableOffset );
- OTV_SIZE_CHECK( DeviceTableOffset );
- if ( DeviceTableOffset )
- otv_Device_validate( table + DeviceTableOffset, valid );
- }
-
- /* One more Kerning value */
- for ( i = 0; i < cnt + 1; ++i )
- {
- p += 2; /* Skip the value */
- OTV_OPTIONAL_OFFSET( DeviceTableOffset );
- OTV_SIZE_CHECK( DeviceTableOffset );
- if ( DeviceTableOffset )
- otv_Device_validate( table + DeviceTableOffset, valid );
- }
-
- OTV_EXIT;
- }
-
-
- static void
- otv_MathKernInfo_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt i, j, cnt, table_size;
-
- OTV_OPTIONAL_TABLE( Coverage );
- OTV_OPTIONAL_TABLE( MKRecordOffset );
-
-
- OTV_NAME_ENTER( "MathKernInfo" );
-
- OTV_LIMIT_CHECK( 4 );
-
- OTV_OPTIONAL_OFFSET( Coverage );
- cnt = FT_NEXT_USHORT( p );
-
- OTV_LIMIT_CHECK( 8 * cnt );
- table_size = 4 + 8 * cnt;
-
- OTV_SIZE_CHECK( Coverage );
- otv_Coverage_validate( table + Coverage, valid, cnt );
-
- for ( i = 0; i < cnt; ++i )
- {
- for ( j = 0; j < 4; ++j )
- {
- OTV_OPTIONAL_OFFSET( MKRecordOffset );
- OTV_SIZE_CHECK( MKRecordOffset );
- if ( MKRecordOffset )
- otv_MathKern_validate( table + MKRecordOffset, valid );
- }
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** MATH GLYPH INFO *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static void
- otv_MathGlyphInfo_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt MathItalicsCorrectionInfo, MathTopAccentAttachment;
- FT_UInt ExtendedShapeCoverage, MathKernInfo;
-
-
- OTV_NAME_ENTER( "MathGlyphInfo" );
-
- OTV_LIMIT_CHECK( 8 );
-
- MathItalicsCorrectionInfo = FT_NEXT_USHORT( p );
- MathTopAccentAttachment = FT_NEXT_USHORT( p );
- ExtendedShapeCoverage = FT_NEXT_USHORT( p );
- MathKernInfo = FT_NEXT_USHORT( p );
-
- if ( MathItalicsCorrectionInfo )
- otv_MathItalicsCorrectionInfo_validate(
- table + MathItalicsCorrectionInfo, valid, TRUE );
-
- /* Italic correction and Top Accent Attachment have the same format */
- if ( MathTopAccentAttachment )
- otv_MathItalicsCorrectionInfo_validate(
- table + MathTopAccentAttachment, valid, FALSE );
-
- if ( ExtendedShapeCoverage )
- {
- OTV_NAME_ENTER( "ExtendedShapeCoverage" );
- otv_Coverage_validate( table + ExtendedShapeCoverage, valid, -1 );
- OTV_EXIT;
- }
-
- if ( MathKernInfo )
- otv_MathKernInfo_validate( table + MathKernInfo, valid );
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** MATH GLYPH CONSTRUCTION *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static void
- otv_GlyphAssembly_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt pcnt, table_size;
- FT_UInt i;
-
- OTV_OPTIONAL_TABLE( DeviceTableOffset );
-
-
- /* OTV_NAME_ENTER( "GlyphAssembly" ); */
-
- OTV_LIMIT_CHECK( 6 );
-
- p += 2; /* Skip the Italics Correction value */
- OTV_OPTIONAL_OFFSET( DeviceTableOffset );
- pcnt = FT_NEXT_USHORT( p );
-
- OTV_LIMIT_CHECK( 8 * pcnt );
- table_size = 6 + 8 * pcnt;
-
- OTV_SIZE_CHECK( DeviceTableOffset );
- if ( DeviceTableOffset )
- otv_Device_validate( table + DeviceTableOffset, valid );
-
- for ( i = 0; i < pcnt; ++i )
- {
- FT_UInt gid;
-
-
- gid = FT_NEXT_USHORT( p );
- if ( gid >= valid->glyph_count )
- FT_INVALID_GLYPH_ID;
- p += 2*4; /* skip the Start, End, Full, and Flags fields */
- }
-
- /* OTV_EXIT; */
- }
-
-
- static void
- otv_MathGlyphConstruction_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt vcnt, table_size;
- FT_UInt i;
-
- OTV_OPTIONAL_TABLE( GlyphAssembly );
-
-
- /* OTV_NAME_ENTER( "MathGlyphConstruction" ); */
-
- OTV_LIMIT_CHECK( 4 );
-
- OTV_OPTIONAL_OFFSET( GlyphAssembly );
- vcnt = FT_NEXT_USHORT( p );
-
- OTV_LIMIT_CHECK( 4 * vcnt );
- table_size = 4 + 4 * vcnt;
-
- for ( i = 0; i < vcnt; ++i )
- {
- FT_UInt gid;
-
-
- gid = FT_NEXT_USHORT( p );
- if ( gid >= valid->glyph_count )
- FT_INVALID_GLYPH_ID;
- p += 2; /* skip the size */
- }
-
- OTV_SIZE_CHECK( GlyphAssembly );
- if ( GlyphAssembly )
- otv_GlyphAssembly_validate( table+GlyphAssembly, valid );
-
- /* OTV_EXIT; */
- }
-
-
- static void
- otv_MathVariants_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt vcnt, hcnt, i, table_size;
-
- OTV_OPTIONAL_TABLE( VCoverage );
- OTV_OPTIONAL_TABLE( HCoverage );
- OTV_OPTIONAL_TABLE( Offset );
-
-
- OTV_NAME_ENTER( "MathVariants" );
-
- OTV_LIMIT_CHECK( 10 );
-
- p += 2; /* Skip the MinConnectorOverlap constant */
- OTV_OPTIONAL_OFFSET( VCoverage );
- OTV_OPTIONAL_OFFSET( HCoverage );
- vcnt = FT_NEXT_USHORT( p );
- hcnt = FT_NEXT_USHORT( p );
-
- OTV_LIMIT_CHECK( 2 * vcnt + 2 * hcnt );
- table_size = 10 + 2 * vcnt + 2 * hcnt;
-
- OTV_SIZE_CHECK( VCoverage );
- if ( VCoverage )
- otv_Coverage_validate( table + VCoverage, valid, vcnt );
-
- OTV_SIZE_CHECK( HCoverage );
- if ( HCoverage )
- otv_Coverage_validate( table + HCoverage, valid, hcnt );
-
- for ( i = 0; i < vcnt; ++i )
- {
- OTV_OPTIONAL_OFFSET( Offset );
- OTV_SIZE_CHECK( Offset );
- otv_MathGlyphConstruction_validate( table + Offset, valid );
- }
-
- for ( i = 0; i < hcnt; ++i )
- {
- OTV_OPTIONAL_OFFSET( Offset );
- OTV_SIZE_CHECK( Offset );
- otv_MathGlyphConstruction_validate( table + Offset, valid );
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** MATH TABLE *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /* sets valid->glyph_count */
-
- FT_LOCAL_DEF( void )
- otv_MATH_validate( FT_Bytes table,
- FT_UInt glyph_count,
- FT_Validator ftvalid )
- {
- OTV_ValidatorRec validrec;
- OTV_Validator valid = &validrec;
- FT_Bytes p = table;
- FT_UInt MathConstants, MathGlyphInfo, MathVariants;
-
-
- valid->root = ftvalid;
-
- FT_TRACE3(( "validating MATH table\n" ));
- OTV_INIT;
-
- OTV_LIMIT_CHECK( 10 );
-
- if ( FT_NEXT_ULONG( p ) != 0x10000UL ) /* Version */
- FT_INVALID_FORMAT;
-
- MathConstants = FT_NEXT_USHORT( p );
- MathGlyphInfo = FT_NEXT_USHORT( p );
- MathVariants = FT_NEXT_USHORT( p );
-
- valid->glyph_count = glyph_count;
-
- otv_MathConstants_validate( table + MathConstants,
- valid );
- otv_MathGlyphInfo_validate( table + MathGlyphInfo,
- valid );
- otv_MathVariants_validate ( table + MathVariants,
- valid );
-
- FT_TRACE4(( "\n" ));
- }
-
-
-/* END */