--- a/misc/libfreetype/src/otvalid/otvcommn.c Tue Jul 16 11:14:27 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1086 +0,0 @@
-/***************************************************************************/
-/* */
-/* otvcommn.c */
-/* */
-/* OpenType common tables validation (body). */
-/* */
-/* Copyright 2004, 2005, 2006, 2007 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. */
-/* */
-/***************************************************************************/
-
-
-#include "otvcommn.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_otvcommon
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** COVERAGE TABLE *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- FT_LOCAL_DEF( void )
- otv_Coverage_validate( FT_Bytes table,
- OTV_Validator valid,
- FT_Int expected_count )
- {
- FT_Bytes p = table;
- FT_UInt CoverageFormat;
- FT_UInt total = 0;
-
-
- OTV_NAME_ENTER( "Coverage" );
-
- OTV_LIMIT_CHECK( 4 );
- CoverageFormat = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (format %d)\n", CoverageFormat ));
-
- switch ( CoverageFormat )
- {
- case 1: /* CoverageFormat1 */
- {
- FT_UInt GlyphCount;
- FT_UInt i;
-
-
- GlyphCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (GlyphCount = %d)\n", GlyphCount ));
-
- OTV_LIMIT_CHECK( GlyphCount * 2 ); /* GlyphArray */
-
- for ( i = 0; i < GlyphCount; ++i )
- {
- FT_UInt gid;
-
-
- gid = FT_NEXT_USHORT( p );
- if ( gid >= valid->glyph_count )
- FT_INVALID_GLYPH_ID;
- }
-
- total = GlyphCount;
- }
- break;
-
- case 2: /* CoverageFormat2 */
- {
- FT_UInt n, RangeCount;
- FT_UInt Start, End, StartCoverageIndex, last = 0;
-
-
- RangeCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (RangeCount = %d)\n", RangeCount ));
-
- OTV_LIMIT_CHECK( RangeCount * 6 );
-
- /* RangeRecord */
- for ( n = 0; n < RangeCount; n++ )
- {
- Start = FT_NEXT_USHORT( p );
- End = FT_NEXT_USHORT( p );
- StartCoverageIndex = FT_NEXT_USHORT( p );
-
- if ( Start > End || StartCoverageIndex != total )
- FT_INVALID_DATA;
-
- if ( End >= valid->glyph_count )
- FT_INVALID_GLYPH_ID;
-
- if ( n > 0 && Start <= last )
- FT_INVALID_DATA;
-
- total += End - Start + 1;
- last = End;
- }
- }
- break;
-
- default:
- FT_INVALID_FORMAT;
- }
-
- /* Generally, a coverage table offset has an associated count field. */
- /* The number of glyphs in the table should match this field. If */
- /* there is no associated count, a value of -1 tells us not to check. */
- if ( expected_count != -1 && (FT_UInt)expected_count != total )
- FT_INVALID_DATA;
-
- OTV_EXIT;
- }
-
-
- FT_LOCAL_DEF( FT_UInt )
- otv_Coverage_get_first( FT_Bytes table )
- {
- FT_Bytes p = table;
-
-
- p += 4; /* skip CoverageFormat and Glyph/RangeCount */
-
- return FT_NEXT_USHORT( p );
- }
-
-
- FT_LOCAL_DEF( FT_UInt )
- otv_Coverage_get_last( FT_Bytes table )
- {
- FT_Bytes p = table;
- FT_UInt CoverageFormat = FT_NEXT_USHORT( p );
- FT_UInt count = FT_NEXT_USHORT( p ); /* Glyph/RangeCount */
- FT_UInt result = 0;
-
-
- switch ( CoverageFormat )
- {
- case 1:
- p += ( count - 1 ) * 2;
- result = FT_NEXT_USHORT( p );
- break;
-
- case 2:
- p += ( count - 1 ) * 6 + 2;
- result = FT_NEXT_USHORT( p );
- break;
-
- default:
- ;
- }
-
- return result;
- }
-
-
- FT_LOCAL_DEF( FT_UInt )
- otv_Coverage_get_count( FT_Bytes table )
- {
- FT_Bytes p = table;
- FT_UInt CoverageFormat = FT_NEXT_USHORT( p );
- FT_UInt count = FT_NEXT_USHORT( p ); /* Glyph/RangeCount */
- FT_UInt result = 0;
-
-
- switch ( CoverageFormat )
- {
- case 1:
- return count;
-
- case 2:
- {
- FT_UInt Start, End;
-
-
- for ( ; count > 0; count-- )
- {
- Start = FT_NEXT_USHORT( p );
- End = FT_NEXT_USHORT( p );
- p += 2; /* skip StartCoverageIndex */
-
- result += End - Start + 1;
- }
- }
- break;
-
- default:
- ;
- }
-
- return result;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** CLASS DEFINITION TABLE *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- FT_LOCAL_DEF( void )
- otv_ClassDef_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt ClassFormat;
-
-
- OTV_NAME_ENTER( "ClassDef" );
-
- OTV_LIMIT_CHECK( 4 );
- ClassFormat = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (format %d)\n", ClassFormat ));
-
- switch ( ClassFormat )
- {
- case 1: /* ClassDefFormat1 */
- {
- FT_UInt StartGlyph;
- FT_UInt GlyphCount;
-
-
- OTV_LIMIT_CHECK( 4 );
-
- StartGlyph = FT_NEXT_USHORT( p );
- GlyphCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (GlyphCount = %d)\n", GlyphCount ));
-
- OTV_LIMIT_CHECK( GlyphCount * 2 ); /* ClassValueArray */
-
- if ( StartGlyph + GlyphCount - 1 >= valid->glyph_count )
- FT_INVALID_GLYPH_ID;
- }
- break;
-
- case 2: /* ClassDefFormat2 */
- {
- FT_UInt n, ClassRangeCount;
- FT_UInt Start, End, last = 0;
-
-
- ClassRangeCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (ClassRangeCount = %d)\n", ClassRangeCount ));
-
- OTV_LIMIT_CHECK( ClassRangeCount * 6 );
-
- /* ClassRangeRecord */
- for ( n = 0; n < ClassRangeCount; n++ )
- {
- Start = FT_NEXT_USHORT( p );
- End = FT_NEXT_USHORT( p );
- p += 2; /* skip Class */
-
- if ( Start > End || ( n > 0 && Start <= last ) )
- FT_INVALID_DATA;
-
- if ( End >= valid->glyph_count )
- FT_INVALID_GLYPH_ID;
-
- last = End;
- }
- }
- break;
-
- default:
- FT_INVALID_FORMAT;
- }
-
- /* no need to check glyph indices used as input to class definition */
- /* tables since even invalid glyph indices return a meaningful result */
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** DEVICE TABLE *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- FT_LOCAL_DEF( void )
- otv_Device_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt StartSize, EndSize, DeltaFormat, count;
-
-
- OTV_NAME_ENTER( "Device" );
-
- OTV_LIMIT_CHECK( 8 );
- StartSize = FT_NEXT_USHORT( p );
- EndSize = FT_NEXT_USHORT( p );
- DeltaFormat = FT_NEXT_USHORT( p );
-
- if ( DeltaFormat < 1 || DeltaFormat > 3 )
- FT_INVALID_FORMAT;
-
- if ( EndSize < StartSize )
- FT_INVALID_DATA;
-
- count = EndSize - StartSize + 1;
- OTV_LIMIT_CHECK( ( 1 << DeltaFormat ) * count / 8 ); /* DeltaValue */
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** LOOKUPS *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /* uses valid->type_count */
- /* uses valid->type_funcs */
-
- FT_LOCAL_DEF( void )
- otv_Lookup_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt LookupType, SubTableCount;
- OTV_Validate_Func validate;
-
-
- OTV_NAME_ENTER( "Lookup" );
-
- OTV_LIMIT_CHECK( 6 );
- LookupType = FT_NEXT_USHORT( p );
- p += 2; /* skip LookupFlag */
- SubTableCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (type %d)\n", LookupType ));
-
- if ( LookupType == 0 || LookupType > valid->type_count )
- FT_INVALID_DATA;
-
- validate = valid->type_funcs[LookupType - 1];
-
- OTV_TRACE(( " (SubTableCount = %d)\n", SubTableCount ));
-
- OTV_LIMIT_CHECK( SubTableCount * 2 );
-
- /* SubTable */
- for ( ; SubTableCount > 0; SubTableCount-- )
- validate( table + FT_NEXT_USHORT( p ), valid );
-
- OTV_EXIT;
- }
-
-
- /* uses valid->lookup_count */
-
- FT_LOCAL_DEF( void )
- otv_LookupList_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt LookupCount;
-
-
- OTV_NAME_ENTER( "LookupList" );
-
- OTV_LIMIT_CHECK( 2 );
- LookupCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (LookupCount = %d)\n", LookupCount ));
-
- OTV_LIMIT_CHECK( LookupCount * 2 );
-
- valid->lookup_count = LookupCount;
-
- /* Lookup */
- for ( ; LookupCount > 0; LookupCount-- )
- otv_Lookup_validate( table + FT_NEXT_USHORT( p ), valid );
-
- OTV_EXIT;
- }
-
-
- static FT_UInt
- otv_LookupList_get_count( FT_Bytes table )
- {
- return FT_NEXT_USHORT( table );
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** FEATURES *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /* uses valid->lookup_count */
-
- FT_LOCAL_DEF( void )
- otv_Feature_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt LookupCount;
-
-
- OTV_NAME_ENTER( "Feature" );
-
- OTV_LIMIT_CHECK( 4 );
- p += 2; /* skip FeatureParams (unused) */
- LookupCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (LookupCount = %d)\n", LookupCount ));
-
- OTV_LIMIT_CHECK( LookupCount * 2 );
-
- /* LookupListIndex */
- for ( ; LookupCount > 0; LookupCount-- )
- if ( FT_NEXT_USHORT( p ) >= valid->lookup_count )
- FT_INVALID_DATA;
-
- OTV_EXIT;
- }
-
-
- static FT_UInt
- otv_Feature_get_count( FT_Bytes table )
- {
- return FT_NEXT_USHORT( table );
- }
-
-
- /* sets valid->lookup_count */
-
- FT_LOCAL_DEF( void )
- otv_FeatureList_validate( FT_Bytes table,
- FT_Bytes lookups,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt FeatureCount;
-
-
- OTV_NAME_ENTER( "FeatureList" );
-
- OTV_LIMIT_CHECK( 2 );
- FeatureCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (FeatureCount = %d)\n", FeatureCount ));
-
- OTV_LIMIT_CHECK( FeatureCount * 2 );
-
- valid->lookup_count = otv_LookupList_get_count( lookups );
-
- /* FeatureRecord */
- for ( ; FeatureCount > 0; FeatureCount-- )
- {
- p += 4; /* skip FeatureTag */
-
- /* Feature */
- otv_Feature_validate( table + FT_NEXT_USHORT( p ), valid );
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** LANGUAGE SYSTEM *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /* uses valid->extra1 (number of features) */
-
- FT_LOCAL_DEF( void )
- otv_LangSys_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt ReqFeatureIndex;
- FT_UInt FeatureCount;
-
-
- OTV_NAME_ENTER( "LangSys" );
-
- OTV_LIMIT_CHECK( 6 );
- p += 2; /* skip LookupOrder (unused) */
- ReqFeatureIndex = FT_NEXT_USHORT( p );
- FeatureCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (ReqFeatureIndex = %d)\n", ReqFeatureIndex ));
- OTV_TRACE(( " (FeatureCount = %d)\n", FeatureCount ));
-
- if ( ReqFeatureIndex != 0xFFFFU && ReqFeatureIndex >= valid->extra1 )
- FT_INVALID_DATA;
-
- OTV_LIMIT_CHECK( FeatureCount * 2 );
-
- /* FeatureIndex */
- for ( ; FeatureCount > 0; FeatureCount-- )
- if ( FT_NEXT_USHORT( p ) >= valid->extra1 )
- FT_INVALID_DATA;
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** SCRIPTS *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- FT_LOCAL_DEF( void )
- otv_Script_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_UInt DefaultLangSys, LangSysCount;
- FT_Bytes p = table;
-
-
- OTV_NAME_ENTER( "Script" );
-
- OTV_LIMIT_CHECK( 4 );
- DefaultLangSys = FT_NEXT_USHORT( p );
- LangSysCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (LangSysCount = %d)\n", LangSysCount ));
-
- if ( DefaultLangSys != 0 )
- otv_LangSys_validate( table + DefaultLangSys, valid );
-
- OTV_LIMIT_CHECK( LangSysCount * 6 );
-
- /* LangSysRecord */
- for ( ; LangSysCount > 0; LangSysCount-- )
- {
- p += 4; /* skip LangSysTag */
-
- /* LangSys */
- otv_LangSys_validate( table + FT_NEXT_USHORT( p ), valid );
- }
-
- OTV_EXIT;
- }
-
-
- /* sets valid->extra1 (number of features) */
-
- FT_LOCAL_DEF( void )
- otv_ScriptList_validate( FT_Bytes table,
- FT_Bytes features,
- OTV_Validator valid )
- {
- FT_UInt ScriptCount;
- FT_Bytes p = table;
-
-
- OTV_NAME_ENTER( "ScriptList" );
-
- OTV_LIMIT_CHECK( 2 );
- ScriptCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (ScriptCount = %d)\n", ScriptCount ));
-
- OTV_LIMIT_CHECK( ScriptCount * 6 );
-
- valid->extra1 = otv_Feature_get_count( features );
-
- /* ScriptRecord */
- for ( ; ScriptCount > 0; ScriptCount-- )
- {
- p += 4; /* skip ScriptTag */
-
- otv_Script_validate( table + FT_NEXT_USHORT( p ), valid ); /* Script */
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** UTILITY FUNCTIONS *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /*
- u: uint16
- ux: unit16 [x]
-
- s: struct
- sx: struct [x]
- sxy: struct [x], using external y count
-
- x: uint16 x
-
- C: Coverage
-
- O: Offset
- On: Offset (NULL)
- Ox: Offset [x]
- Onx: Offset (NULL) [x]
- */
-
- FT_LOCAL_DEF( void )
- otv_x_Ox( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt Count;
- OTV_Validate_Func func;
-
-
- OTV_ENTER;
-
- OTV_LIMIT_CHECK( 2 );
- Count = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (Count = %d)\n", Count ));
-
- OTV_LIMIT_CHECK( Count * 2 );
-
- valid->nesting_level++;
- func = valid->func[valid->nesting_level];
-
- for ( ; Count > 0; Count-- )
- func( table + FT_NEXT_USHORT( p ), valid );
-
- valid->nesting_level--;
-
- OTV_EXIT;
- }
-
-
- FT_LOCAL_DEF( void )
- otv_u_C_x_Ox( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt Count, Coverage;
- OTV_Validate_Func func;
-
-
- OTV_ENTER;
-
- p += 2; /* skip Format */
-
- OTV_LIMIT_CHECK( 4 );
- Coverage = FT_NEXT_USHORT( p );
- Count = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (Count = %d)\n", Count ));
-
- otv_Coverage_validate( table + Coverage, valid, Count );
-
- OTV_LIMIT_CHECK( Count * 2 );
-
- valid->nesting_level++;
- func = valid->func[valid->nesting_level];
-
- for ( ; Count > 0; Count-- )
- func( table + FT_NEXT_USHORT( p ), valid );
-
- valid->nesting_level--;
-
- OTV_EXIT;
- }
-
-
- /* uses valid->extra1 (if > 0: array value limit) */
-
- FT_LOCAL_DEF( void )
- otv_x_ux( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt Count;
-
-
- OTV_ENTER;
-
- OTV_LIMIT_CHECK( 2 );
- Count = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (Count = %d)\n", Count ));
-
- OTV_LIMIT_CHECK( Count * 2 );
-
- if ( valid->extra1 )
- {
- for ( ; Count > 0; Count-- )
- if ( FT_NEXT_USHORT( p ) >= valid->extra1 )
- FT_INVALID_DATA;
- }
-
- OTV_EXIT;
- }
-
-
- /* `ux' in the function's name is not really correct since only x-1 */
- /* elements are tested */
-
- /* uses valid->extra1 (array value limit) */
-
- FT_LOCAL_DEF( void )
- otv_x_y_ux_sy( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt Count1, Count2;
-
-
- OTV_ENTER;
-
- OTV_LIMIT_CHECK( 4 );
- Count1 = FT_NEXT_USHORT( p );
- Count2 = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (Count1 = %d)\n", Count1 ));
- OTV_TRACE(( " (Count2 = %d)\n", Count2 ));
-
- if ( Count1 == 0 )
- FT_INVALID_DATA;
-
- OTV_LIMIT_CHECK( ( Count1 - 1 ) * 2 + Count2 * 4 );
- p += ( Count1 - 1 ) * 2;
-
- for ( ; Count2 > 0; Count2-- )
- {
- if ( FT_NEXT_USHORT( p ) >= Count1 )
- FT_INVALID_DATA;
-
- if ( FT_NEXT_USHORT( p ) >= valid->extra1 )
- FT_INVALID_DATA;
- }
-
- OTV_EXIT;
- }
-
-
- /* `uy' in the function's name is not really correct since only y-1 */
- /* elements are tested */
-
- /* uses valid->extra1 (array value limit) */
-
- FT_LOCAL_DEF( void )
- otv_x_ux_y_uy_z_uz_p_sp( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt BacktrackCount, InputCount, LookaheadCount;
- FT_UInt Count;
-
-
- OTV_ENTER;
-
- OTV_LIMIT_CHECK( 2 );
- BacktrackCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (BacktrackCount = %d)\n", BacktrackCount ));
-
- OTV_LIMIT_CHECK( BacktrackCount * 2 + 2 );
- p += BacktrackCount * 2;
-
- InputCount = FT_NEXT_USHORT( p );
- if ( InputCount == 0 )
- FT_INVALID_DATA;
-
- OTV_TRACE(( " (InputCount = %d)\n", InputCount ));
-
- OTV_LIMIT_CHECK( InputCount * 2 );
- p += ( InputCount - 1 ) * 2;
-
- LookaheadCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (LookaheadCount = %d)\n", LookaheadCount ));
-
- OTV_LIMIT_CHECK( LookaheadCount * 2 + 2 );
- p += LookaheadCount * 2;
-
- Count = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (Count = %d)\n", Count ));
-
- OTV_LIMIT_CHECK( Count * 4 );
-
- for ( ; Count > 0; Count-- )
- {
- if ( FT_NEXT_USHORT( p ) >= InputCount )
- FT_INVALID_DATA;
-
- if ( FT_NEXT_USHORT( p ) >= valid->extra1 )
- FT_INVALID_DATA;
- }
-
- OTV_EXIT;
- }
-
-
- /* sets valid->extra1 (valid->lookup_count) */
-
- FT_LOCAL_DEF( void )
- otv_u_O_O_x_Onx( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt Coverage, ClassDef, ClassSetCount;
- OTV_Validate_Func func;
-
-
- OTV_ENTER;
-
- p += 2; /* skip Format */
-
- OTV_LIMIT_CHECK( 6 );
- Coverage = FT_NEXT_USHORT( p );
- ClassDef = FT_NEXT_USHORT( p );
- ClassSetCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (ClassSetCount = %d)\n", ClassSetCount ));
-
- otv_Coverage_validate( table + Coverage, valid, -1 );
- otv_ClassDef_validate( table + ClassDef, valid );
-
- OTV_LIMIT_CHECK( ClassSetCount * 2 );
-
- valid->nesting_level++;
- func = valid->func[valid->nesting_level];
- valid->extra1 = valid->lookup_count;
-
- for ( ; ClassSetCount > 0; ClassSetCount-- )
- {
- FT_UInt offset = FT_NEXT_USHORT( p );
-
-
- if ( offset )
- func( table + offset, valid );
- }
-
- valid->nesting_level--;
-
- OTV_EXIT;
- }
-
-
- /* uses valid->lookup_count */
-
- FT_LOCAL_DEF( void )
- otv_u_x_y_Ox_sy( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt GlyphCount, Count, count1;
-
-
- OTV_ENTER;
-
- p += 2; /* skip Format */
-
- OTV_LIMIT_CHECK( 4 );
- GlyphCount = FT_NEXT_USHORT( p );
- Count = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (GlyphCount = %d)\n", GlyphCount ));
- OTV_TRACE(( " (Count = %d)\n", Count ));
-
- OTV_LIMIT_CHECK( GlyphCount * 2 + Count * 4 );
-
- for ( count1 = GlyphCount; count1 > 0; count1-- )
- otv_Coverage_validate( table + FT_NEXT_USHORT( p ), valid, -1 );
-
- for ( ; Count > 0; Count-- )
- {
- if ( FT_NEXT_USHORT( p ) >= GlyphCount )
- FT_INVALID_DATA;
-
- if ( FT_NEXT_USHORT( p ) >= valid->lookup_count )
- FT_INVALID_DATA;
- }
-
- OTV_EXIT;
- }
-
-
- /* sets valid->extra1 (valid->lookup_count) */
-
- FT_LOCAL_DEF( void )
- otv_u_O_O_O_O_x_Onx( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt Coverage;
- FT_UInt BacktrackClassDef, InputClassDef, LookaheadClassDef;
- FT_UInt ChainClassSetCount;
- OTV_Validate_Func func;
-
-
- OTV_ENTER;
-
- p += 2; /* skip Format */
-
- OTV_LIMIT_CHECK( 10 );
- Coverage = FT_NEXT_USHORT( p );
- BacktrackClassDef = FT_NEXT_USHORT( p );
- InputClassDef = FT_NEXT_USHORT( p );
- LookaheadClassDef = FT_NEXT_USHORT( p );
- ChainClassSetCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (ChainClassSetCount = %d)\n", ChainClassSetCount ));
-
- otv_Coverage_validate( table + Coverage, valid, -1 );
-
- otv_ClassDef_validate( table + BacktrackClassDef, valid );
- otv_ClassDef_validate( table + InputClassDef, valid );
- otv_ClassDef_validate( table + LookaheadClassDef, valid );
-
- OTV_LIMIT_CHECK( ChainClassSetCount * 2 );
-
- valid->nesting_level++;
- func = valid->func[valid->nesting_level];
- valid->extra1 = valid->lookup_count;
-
- for ( ; ChainClassSetCount > 0; ChainClassSetCount-- )
- {
- FT_UInt offset = FT_NEXT_USHORT( p );
-
-
- if ( offset )
- func( table + offset, valid );
- }
-
- valid->nesting_level--;
-
- OTV_EXIT;
- }
-
-
- /* uses valid->lookup_count */
-
- FT_LOCAL_DEF( void )
- otv_u_x_Ox_y_Oy_z_Oz_p_sp( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt BacktrackGlyphCount, InputGlyphCount, LookaheadGlyphCount;
- FT_UInt count1, count2;
-
-
- OTV_ENTER;
-
- p += 2; /* skip Format */
-
- OTV_LIMIT_CHECK( 2 );
- BacktrackGlyphCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (BacktrackGlyphCount = %d)\n", BacktrackGlyphCount ));
-
- OTV_LIMIT_CHECK( BacktrackGlyphCount * 2 + 2 );
-
- for ( ; BacktrackGlyphCount > 0; BacktrackGlyphCount-- )
- otv_Coverage_validate( table + FT_NEXT_USHORT( p ), valid, -1 );
-
- InputGlyphCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (InputGlyphCount = %d)\n", InputGlyphCount ));
-
- OTV_LIMIT_CHECK( InputGlyphCount * 2 + 2 );
-
- for ( count1 = InputGlyphCount; count1 > 0; count1-- )
- otv_Coverage_validate( table + FT_NEXT_USHORT( p ), valid, -1 );
-
- LookaheadGlyphCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (LookaheadGlyphCount = %d)\n", LookaheadGlyphCount ));
-
- OTV_LIMIT_CHECK( LookaheadGlyphCount * 2 + 2 );
-
- for ( ; LookaheadGlyphCount > 0; LookaheadGlyphCount-- )
- otv_Coverage_validate( table + FT_NEXT_USHORT( p ), valid, -1 );
-
- count2 = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (Count = %d)\n", count2 ));
-
- OTV_LIMIT_CHECK( count2 * 4 );
-
- for ( ; count2 > 0; count2-- )
- {
- if ( FT_NEXT_USHORT( p ) >= InputGlyphCount )
- FT_INVALID_DATA;
-
- if ( FT_NEXT_USHORT( p ) >= valid->lookup_count )
- FT_INVALID_DATA;
- }
-
- OTV_EXIT;
- }
-
-
- FT_LOCAL_DEF( FT_UInt )
- otv_GSUBGPOS_get_Lookup_count( FT_Bytes table )
- {
- FT_Bytes p = table + 8;
-
-
- return otv_LookupList_get_count( table + FT_NEXT_USHORT( p ) );
- }
-
-
- FT_LOCAL_DEF( FT_UInt )
- otv_GSUBGPOS_have_MarkAttachmentType_flag( FT_Bytes table )
- {
- FT_Bytes p, lookup;
- FT_UInt count;
-
-
- if ( !table )
- return 0;
-
- /* LookupList */
- p = table + 8;
- table += FT_NEXT_USHORT( p );
-
- /* LookupCount */
- p = table;
- count = FT_NEXT_USHORT( p );
-
- for ( ; count > 0; count-- )
- {
- FT_Bytes oldp;
-
-
- /* Lookup */
- lookup = table + FT_NEXT_USHORT( p );
-
- oldp = p;
-
- /* LookupFlag */
- p = lookup + 2;
- if ( FT_NEXT_USHORT( p ) & 0xFF00U )
- return 1;
-
- p = oldp;
- }
-
- return 0;
- }
-
-
-/* END */