--- a/misc/libfreetype/src/otvalid/otvgpos.c Fri Oct 11 11:55:31 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1017 +0,0 @@
-/***************************************************************************/
-/* */
-/* otvgpos.c */
-/* */
-/* OpenType GPOS table validation (body). */
-/* */
-/* Copyright 2002, 2004, 2005, 2006, 2007, 2008 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 "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_otvgpos
-
-
- static void
- otv_Anchor_validate( FT_Bytes table,
- OTV_Validator valid );
-
- static void
- otv_MarkArray_validate( FT_Bytes table,
- OTV_Validator valid );
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** UTILITY FUNCTIONS *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
-#define BaseArrayFunc otv_x_sxy
-#define LigatureAttachFunc otv_x_sxy
-#define Mark2ArrayFunc otv_x_sxy
-
- /* uses valid->extra1 (counter) */
- /* uses valid->extra2 (boolean to handle NULL anchor field) */
-
- static void
- otv_x_sxy( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt Count, count1, table_size;
-
-
- OTV_ENTER;
-
- OTV_LIMIT_CHECK( 2 );
-
- Count = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (Count = %d)\n", Count ));
-
- OTV_LIMIT_CHECK( Count * valid->extra1 * 2 );
-
- table_size = Count * valid->extra1 * 2 + 2;
-
- for ( ; Count > 0; Count-- )
- for ( count1 = valid->extra1; count1 > 0; count1-- )
- {
- OTV_OPTIONAL_TABLE( anchor_offset );
-
-
- OTV_OPTIONAL_OFFSET( anchor_offset );
-
- if ( valid->extra2 )
- {
- OTV_SIZE_CHECK( anchor_offset );
- if ( anchor_offset )
- otv_Anchor_validate( table + anchor_offset, valid );
- }
- else
- otv_Anchor_validate( table + anchor_offset, valid );
- }
-
- OTV_EXIT;
- }
-
-
-#define MarkBasePosFormat1Func otv_u_O_O_u_O_O
-#define MarkLigPosFormat1Func otv_u_O_O_u_O_O
-#define MarkMarkPosFormat1Func otv_u_O_O_u_O_O
-
- /* sets valid->extra1 (class count) */
-
- static void
- otv_u_O_O_u_O_O( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt Coverage1, Coverage2, ClassCount;
- FT_UInt Array1, Array2;
- OTV_Validate_Func func;
-
-
- OTV_ENTER;
-
- p += 2; /* skip PosFormat */
-
- OTV_LIMIT_CHECK( 10 );
- Coverage1 = FT_NEXT_USHORT( p );
- Coverage2 = FT_NEXT_USHORT( p );
- ClassCount = FT_NEXT_USHORT( p );
- Array1 = FT_NEXT_USHORT( p );
- Array2 = FT_NEXT_USHORT( p );
-
- otv_Coverage_validate( table + Coverage1, valid, -1 );
- otv_Coverage_validate( table + Coverage2, valid, -1 );
-
- otv_MarkArray_validate( table + Array1, valid );
-
- valid->nesting_level++;
- func = valid->func[valid->nesting_level];
- valid->extra1 = ClassCount;
-
- func( table + Array2, valid );
-
- valid->nesting_level--;
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** VALUE RECORDS *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static FT_UInt
- otv_value_length( FT_UInt format )
- {
- FT_UInt count;
-
-
- count = ( ( format & 0xAA ) >> 1 ) + ( format & 0x55 );
- count = ( ( count & 0xCC ) >> 2 ) + ( count & 0x33 );
- count = ( ( count & 0xF0 ) >> 4 ) + ( count & 0x0F );
-
- return count * 2;
- }
-
-
- /* uses valid->extra3 (pointer to base table) */
-
- static void
- otv_ValueRecord_validate( FT_Bytes table,
- FT_UInt format,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt count;
-
-#ifdef FT_DEBUG_LEVEL_TRACE
- FT_Int loop;
- FT_ULong res = 0;
-
-
- OTV_NAME_ENTER( "ValueRecord" );
-
- /* display `format' in dual representation */
- for ( loop = 7; loop >= 0; loop-- )
- {
- res <<= 4;
- res += ( format >> loop ) & 1;
- }
-
- OTV_TRACE(( " (format 0b%08lx)\n", res ));
-#endif
-
- if ( format >= 0x100 )
- FT_INVALID_FORMAT;
-
- for ( count = 4; count > 0; count-- )
- {
- if ( format & 1 )
- {
- /* XPlacement, YPlacement, XAdvance, YAdvance */
- OTV_LIMIT_CHECK( 2 );
- p += 2;
- }
-
- format >>= 1;
- }
-
- for ( count = 4; count > 0; count-- )
- {
- if ( format & 1 )
- {
- FT_PtrDist table_size;
-
- OTV_OPTIONAL_TABLE( device );
-
-
- /* XPlaDevice, YPlaDevice, XAdvDevice, YAdvDevice */
- OTV_LIMIT_CHECK( 2 );
- OTV_OPTIONAL_OFFSET( device );
-
- /* XXX: this value is usually too small, especially if the current */
- /* ValueRecord is part of an array -- getting the correct table */
- /* size is probably not worth the trouble */
-
- table_size = p - valid->extra3;
-
- OTV_SIZE_CHECK( device );
- if ( device )
- otv_Device_validate( valid->extra3 + device, valid );
- }
- format >>= 1;
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** ANCHORS *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static void
- otv_Anchor_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt AnchorFormat;
-
-
- OTV_NAME_ENTER( "Anchor");
-
- OTV_LIMIT_CHECK( 6 );
- AnchorFormat = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (format %d)\n", AnchorFormat ));
-
- p += 4; /* skip XCoordinate and YCoordinate */
-
- switch ( AnchorFormat )
- {
- case 1:
- break;
-
- case 2:
- OTV_LIMIT_CHECK( 2 ); /* AnchorPoint */
- break;
-
- case 3:
- {
- FT_UInt table_size;
-
- OTV_OPTIONAL_TABLE( XDeviceTable );
- OTV_OPTIONAL_TABLE( YDeviceTable );
-
-
- OTV_LIMIT_CHECK( 4 );
- OTV_OPTIONAL_OFFSET( XDeviceTable );
- OTV_OPTIONAL_OFFSET( YDeviceTable );
-
- table_size = 6 + 4;
-
- OTV_SIZE_CHECK( XDeviceTable );
- if ( XDeviceTable )
- otv_Device_validate( table + XDeviceTable, valid );
-
- OTV_SIZE_CHECK( YDeviceTable );
- if ( YDeviceTable )
- otv_Device_validate( table + YDeviceTable, valid );
- }
- break;
-
- default:
- FT_INVALID_FORMAT;
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** MARK ARRAYS *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static void
- otv_MarkArray_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt MarkCount;
-
-
- OTV_NAME_ENTER( "MarkArray" );
-
- OTV_LIMIT_CHECK( 2 );
- MarkCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (MarkCount = %d)\n", MarkCount ));
-
- OTV_LIMIT_CHECK( MarkCount * 4 );
-
- /* MarkRecord */
- for ( ; MarkCount > 0; MarkCount-- )
- {
- p += 2; /* skip Class */
- /* MarkAnchor */
- otv_Anchor_validate( table + FT_NEXT_USHORT( p ), valid );
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** GPOS LOOKUP TYPE 1 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /* sets valid->extra3 (pointer to base table) */
-
- static void
- otv_SinglePos_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt PosFormat;
-
-
- OTV_NAME_ENTER( "SinglePos" );
-
- OTV_LIMIT_CHECK( 2 );
- PosFormat = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (format %d)\n", PosFormat ));
-
- valid->extra3 = table;
-
- switch ( PosFormat )
- {
- case 1: /* SinglePosFormat1 */
- {
- FT_UInt Coverage, ValueFormat;
-
-
- OTV_LIMIT_CHECK( 4 );
- Coverage = FT_NEXT_USHORT( p );
- ValueFormat = FT_NEXT_USHORT( p );
-
- otv_Coverage_validate( table + Coverage, valid, -1 );
- otv_ValueRecord_validate( p, ValueFormat, valid ); /* Value */
- }
- break;
-
- case 2: /* SinglePosFormat2 */
- {
- FT_UInt Coverage, ValueFormat, ValueCount, len_value;
-
-
- OTV_LIMIT_CHECK( 6 );
- Coverage = FT_NEXT_USHORT( p );
- ValueFormat = FT_NEXT_USHORT( p );
- ValueCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (ValueCount = %d)\n", ValueCount ));
-
- len_value = otv_value_length( ValueFormat );
-
- otv_Coverage_validate( table + Coverage, valid, ValueCount );
-
- OTV_LIMIT_CHECK( ValueCount * len_value );
-
- /* Value */
- for ( ; ValueCount > 0; ValueCount-- )
- {
- otv_ValueRecord_validate( p, ValueFormat, valid );
- p += len_value;
- }
- }
- break;
-
- default:
- FT_INVALID_FORMAT;
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** GPOS LOOKUP TYPE 2 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static void
- otv_PairSet_validate( FT_Bytes table,
- FT_UInt format1,
- FT_UInt format2,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt value_len1, value_len2, PairValueCount;
-
-
- OTV_NAME_ENTER( "PairSet" );
-
- OTV_LIMIT_CHECK( 2 );
- PairValueCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (PairValueCount = %d)\n", PairValueCount ));
-
- value_len1 = otv_value_length( format1 );
- value_len2 = otv_value_length( format2 );
-
- OTV_LIMIT_CHECK( PairValueCount * ( value_len1 + value_len2 + 2 ) );
-
- /* PairValueRecord */
- for ( ; PairValueCount > 0; PairValueCount-- )
- {
- p += 2; /* skip SecondGlyph */
-
- if ( format1 )
- otv_ValueRecord_validate( p, format1, valid ); /* Value1 */
- p += value_len1;
-
- if ( format2 )
- otv_ValueRecord_validate( p, format2, valid ); /* Value2 */
- p += value_len2;
- }
-
- OTV_EXIT;
- }
-
-
- /* sets valid->extra3 (pointer to base table) */
-
- static void
- otv_PairPos_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt PosFormat;
-
-
- OTV_NAME_ENTER( "PairPos" );
-
- OTV_LIMIT_CHECK( 2 );
- PosFormat = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (format %d)\n", PosFormat ));
-
- valid->extra3 = table;
-
- switch ( PosFormat )
- {
- case 1: /* PairPosFormat1 */
- {
- FT_UInt Coverage, ValueFormat1, ValueFormat2, PairSetCount;
-
-
- OTV_LIMIT_CHECK( 8 );
- Coverage = FT_NEXT_USHORT( p );
- ValueFormat1 = FT_NEXT_USHORT( p );
- ValueFormat2 = FT_NEXT_USHORT( p );
- PairSetCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (PairSetCount = %d)\n", PairSetCount ));
-
- otv_Coverage_validate( table + Coverage, valid, -1 );
-
- OTV_LIMIT_CHECK( PairSetCount * 2 );
-
- /* PairSetOffset */
- for ( ; PairSetCount > 0; PairSetCount-- )
- otv_PairSet_validate( table + FT_NEXT_USHORT( p ),
- ValueFormat1, ValueFormat2, valid );
- }
- break;
-
- case 2: /* PairPosFormat2 */
- {
- FT_UInt Coverage, ValueFormat1, ValueFormat2, ClassDef1, ClassDef2;
- FT_UInt ClassCount1, ClassCount2, len_value1, len_value2, count;
-
-
- OTV_LIMIT_CHECK( 14 );
- Coverage = FT_NEXT_USHORT( p );
- ValueFormat1 = FT_NEXT_USHORT( p );
- ValueFormat2 = FT_NEXT_USHORT( p );
- ClassDef1 = FT_NEXT_USHORT( p );
- ClassDef2 = FT_NEXT_USHORT( p );
- ClassCount1 = FT_NEXT_USHORT( p );
- ClassCount2 = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (ClassCount1 = %d)\n", ClassCount1 ));
- OTV_TRACE(( " (ClassCount2 = %d)\n", ClassCount2 ));
-
- len_value1 = otv_value_length( ValueFormat1 );
- len_value2 = otv_value_length( ValueFormat2 );
-
- otv_Coverage_validate( table + Coverage, valid, -1 );
- otv_ClassDef_validate( table + ClassDef1, valid );
- otv_ClassDef_validate( table + ClassDef2, valid );
-
- OTV_LIMIT_CHECK( ClassCount1 * ClassCount2 *
- ( len_value1 + len_value2 ) );
-
- /* Class1Record */
- for ( ; ClassCount1 > 0; ClassCount1-- )
- {
- /* Class2Record */
- for ( count = ClassCount2; count > 0; count-- )
- {
- if ( ValueFormat1 )
- /* Value1 */
- otv_ValueRecord_validate( p, ValueFormat1, valid );
- p += len_value1;
-
- if ( ValueFormat2 )
- /* Value2 */
- otv_ValueRecord_validate( p, ValueFormat2, valid );
- p += len_value2;
- }
- }
- }
- break;
-
- default:
- FT_INVALID_FORMAT;
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** GPOS LOOKUP TYPE 3 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static void
- otv_CursivePos_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt PosFormat;
-
-
- OTV_NAME_ENTER( "CursivePos" );
-
- OTV_LIMIT_CHECK( 2 );
- PosFormat = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (format %d)\n", PosFormat ));
-
- switch ( PosFormat )
- {
- case 1: /* CursivePosFormat1 */
- {
- FT_UInt table_size;
- FT_UInt Coverage, EntryExitCount;
-
- OTV_OPTIONAL_TABLE( EntryAnchor );
- OTV_OPTIONAL_TABLE( ExitAnchor );
-
-
- OTV_LIMIT_CHECK( 4 );
- Coverage = FT_NEXT_USHORT( p );
- EntryExitCount = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (EntryExitCount = %d)\n", EntryExitCount ));
-
- otv_Coverage_validate( table + Coverage, valid, EntryExitCount );
-
- OTV_LIMIT_CHECK( EntryExitCount * 4 );
-
- table_size = EntryExitCount * 4 + 4;
-
- /* EntryExitRecord */
- for ( ; EntryExitCount > 0; EntryExitCount-- )
- {
- OTV_OPTIONAL_OFFSET( EntryAnchor );
- OTV_OPTIONAL_OFFSET( ExitAnchor );
-
- OTV_SIZE_CHECK( EntryAnchor );
- if ( EntryAnchor )
- otv_Anchor_validate( table + EntryAnchor, valid );
-
- OTV_SIZE_CHECK( ExitAnchor );
- if ( ExitAnchor )
- otv_Anchor_validate( table + ExitAnchor, valid );
- }
- }
- break;
-
- default:
- FT_INVALID_FORMAT;
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** GPOS LOOKUP TYPE 4 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /* UNDOCUMENTED (in OpenType 1.5): */
- /* BaseRecord tables can contain NULL pointers. */
-
- /* sets valid->extra2 (1) */
-
- static void
- otv_MarkBasePos_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt PosFormat;
-
-
- OTV_NAME_ENTER( "MarkBasePos" );
-
- OTV_LIMIT_CHECK( 2 );
- PosFormat = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (format %d)\n", PosFormat ));
-
- switch ( PosFormat )
- {
- case 1:
- valid->extra2 = 1;
- OTV_NEST2( MarkBasePosFormat1, BaseArray );
- OTV_RUN( table, valid );
- break;
-
- default:
- FT_INVALID_FORMAT;
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** GPOS LOOKUP TYPE 5 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /* sets valid->extra2 (1) */
-
- static void
- otv_MarkLigPos_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt PosFormat;
-
-
- OTV_NAME_ENTER( "MarkLigPos" );
-
- OTV_LIMIT_CHECK( 2 );
- PosFormat = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (format %d)\n", PosFormat ));
-
- switch ( PosFormat )
- {
- case 1:
- valid->extra2 = 1;
- OTV_NEST3( MarkLigPosFormat1, LigatureArray, LigatureAttach );
- OTV_RUN( table, valid );
- break;
-
- default:
- FT_INVALID_FORMAT;
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** GPOS LOOKUP TYPE 6 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /* sets valid->extra2 (0) */
-
- static void
- otv_MarkMarkPos_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt PosFormat;
-
-
- OTV_NAME_ENTER( "MarkMarkPos" );
-
- OTV_LIMIT_CHECK( 2 );
- PosFormat = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (format %d)\n", PosFormat ));
-
- switch ( PosFormat )
- {
- case 1:
- valid->extra2 = 0;
- OTV_NEST2( MarkMarkPosFormat1, Mark2Array );
- OTV_RUN( table, valid );
- break;
-
- default:
- FT_INVALID_FORMAT;
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** GPOS LOOKUP TYPE 7 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /* sets valid->extra1 (lookup count) */
-
- static void
- otv_ContextPos_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt PosFormat;
-
-
- OTV_NAME_ENTER( "ContextPos" );
-
- OTV_LIMIT_CHECK( 2 );
- PosFormat = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (format %d)\n", PosFormat ));
-
- switch ( PosFormat )
- {
- case 1:
- /* no need to check glyph indices/classes used as input for these */
- /* context rules since even invalid glyph indices/classes return */
- /* meaningful results */
-
- valid->extra1 = valid->lookup_count;
- OTV_NEST3( ContextPosFormat1, PosRuleSet, PosRule );
- OTV_RUN( table, valid );
- break;
-
- case 2:
- /* no need to check glyph indices/classes used as input for these */
- /* context rules since even invalid glyph indices/classes return */
- /* meaningful results */
-
- OTV_NEST3( ContextPosFormat2, PosClassSet, PosClassRule );
- OTV_RUN( table, valid );
- break;
-
- case 3:
- OTV_NEST1( ContextPosFormat3 );
- OTV_RUN( table, valid );
- break;
-
- default:
- FT_INVALID_FORMAT;
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** GPOS LOOKUP TYPE 8 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /* sets valid->extra1 (lookup count) */
-
- static void
- otv_ChainContextPos_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt PosFormat;
-
-
- OTV_NAME_ENTER( "ChainContextPos" );
-
- OTV_LIMIT_CHECK( 2 );
- PosFormat = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (format %d)\n", PosFormat ));
-
- switch ( PosFormat )
- {
- case 1:
- /* no need to check glyph indices/classes used as input for these */
- /* context rules since even invalid glyph indices/classes return */
- /* meaningful results */
-
- valid->extra1 = valid->lookup_count;
- OTV_NEST3( ChainContextPosFormat1,
- ChainPosRuleSet, ChainPosRule );
- OTV_RUN( table, valid );
- break;
-
- case 2:
- /* no need to check glyph indices/classes used as input for these */
- /* context rules since even invalid glyph indices/classes return */
- /* meaningful results */
-
- OTV_NEST3( ChainContextPosFormat2,
- ChainPosClassSet, ChainPosClassRule );
- OTV_RUN( table, valid );
- break;
-
- case 3:
- OTV_NEST1( ChainContextPosFormat3 );
- OTV_RUN( table, valid );
- break;
-
- default:
- FT_INVALID_FORMAT;
- }
-
- OTV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** GPOS LOOKUP TYPE 9 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /* uses valid->type_funcs */
-
- static void
- otv_ExtensionPos_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UInt PosFormat;
-
-
- OTV_NAME_ENTER( "ExtensionPos" );
-
- OTV_LIMIT_CHECK( 2 );
- PosFormat = FT_NEXT_USHORT( p );
-
- OTV_TRACE(( " (format %d)\n", PosFormat ));
-
- switch ( PosFormat )
- {
- case 1: /* ExtensionPosFormat1 */
- {
- FT_UInt ExtensionLookupType;
- FT_ULong ExtensionOffset;
- OTV_Validate_Func validate;
-
-
- OTV_LIMIT_CHECK( 6 );
- ExtensionLookupType = FT_NEXT_USHORT( p );
- ExtensionOffset = FT_NEXT_ULONG( p );
-
- if ( ExtensionLookupType == 0 || ExtensionLookupType >= 9 )
- FT_INVALID_DATA;
-
- validate = valid->type_funcs[ExtensionLookupType - 1];
- validate( table + ExtensionOffset, valid );
- }
- break;
-
- default:
- FT_INVALID_FORMAT;
- }
-
- OTV_EXIT;
- }
-
-
- static const OTV_Validate_Func otv_gpos_validate_funcs[9] =
- {
- otv_SinglePos_validate,
- otv_PairPos_validate,
- otv_CursivePos_validate,
- otv_MarkBasePos_validate,
- otv_MarkLigPos_validate,
- otv_MarkMarkPos_validate,
- otv_ContextPos_validate,
- otv_ChainContextPos_validate,
- otv_ExtensionPos_validate
- };
-
-
- /* sets valid->type_count */
- /* sets valid->type_funcs */
-
- FT_LOCAL_DEF( void )
- otv_GPOS_subtable_validate( FT_Bytes table,
- OTV_Validator valid )
- {
- valid->type_count = 9;
- valid->type_funcs = (OTV_Validate_Func*)otv_gpos_validate_funcs;
-
- otv_Lookup_validate( table, valid );
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** GPOS TABLE *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /* sets valid->glyph_count */
-
- FT_LOCAL_DEF( void )
- otv_GPOS_validate( FT_Bytes table,
- FT_UInt glyph_count,
- FT_Validator ftvalid )
- {
- OTV_ValidatorRec validrec;
- OTV_Validator valid = &validrec;
- FT_Bytes p = table;
- FT_UInt ScriptList, FeatureList, LookupList;
-
-
- valid->root = ftvalid;
-
- FT_TRACE3(( "validating GPOS table\n" ));
- OTV_INIT;
-
- OTV_LIMIT_CHECK( 10 );
-
- if ( FT_NEXT_ULONG( p ) != 0x10000UL ) /* Version */
- FT_INVALID_FORMAT;
-
- ScriptList = FT_NEXT_USHORT( p );
- FeatureList = FT_NEXT_USHORT( p );
- LookupList = FT_NEXT_USHORT( p );
-
- valid->type_count = 9;
- valid->type_funcs = (OTV_Validate_Func*)otv_gpos_validate_funcs;
- valid->glyph_count = glyph_count;
-
- otv_LookupList_validate( table + LookupList,
- valid );
- otv_FeatureList_validate( table + FeatureList, table + LookupList,
- valid );
- otv_ScriptList_validate( table + ScriptList, table + FeatureList,
- valid );
-
- FT_TRACE4(( "\n" ));
- }
-
-
-/* END */