--- a/misc/libfreetype/src/gxvalid/gxvkern.c Tue Jul 16 11:14:27 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,876 +0,0 @@
-/***************************************************************************/
-/* */
-/* gxvkern.c */
-/* */
-/* TrueTypeGX/AAT kern table validation (body). */
-/* */
-/* Copyright 2004, 2005, 2006, 2007 */
-/* by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
-/* David Turner, Robert Wilhelm, and Werner Lemberg. */
-/* */
-/* This file is part of the FreeType project, and may only be used, */
-/* modified, and distributed under the terms of the FreeType project */
-/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
-/* this file you indicate that you have read the license and */
-/* understand and accept it fully. */
-/* */
-/***************************************************************************/
-
-/***************************************************************************/
-/* */
-/* gxvalid is derived from both gxlayout module and otvalid module. */
-/* Development of gxlayout is supported by the Information-technology */
-/* Promotion Agency(IPA), Japan. */
-/* */
-/***************************************************************************/
-
-
-#include "gxvalid.h"
-#include "gxvcommn.h"
-
-#include FT_SFNT_NAMES_H
-#include FT_SERVICE_GX_VALIDATE_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_gxvkern
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** Data and Types *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- typedef enum GXV_kern_Version_
- {
- KERN_VERSION_CLASSIC = 0x0000,
- KERN_VERSION_NEW = 0x0001
-
- } GXV_kern_Version;
-
-
- typedef enum GXV_kern_Dialect_
- {
- KERN_DIALECT_UNKNOWN = 0,
- KERN_DIALECT_MS = FT_VALIDATE_MS,
- KERN_DIALECT_APPLE = FT_VALIDATE_APPLE,
- KERN_DIALECT_ANY = FT_VALIDATE_CKERN
-
- } GXV_kern_Dialect;
-
-
- typedef struct GXV_kern_DataRec_
- {
- GXV_kern_Version version;
- void *subtable_data;
- GXV_kern_Dialect dialect_request;
-
- } GXV_kern_DataRec, *GXV_kern_Data;
-
-
-#define GXV_KERN_DATA( field ) GXV_TABLE_DATA( kern, field )
-
-#define KERN_IS_CLASSIC( valid ) \
- ( KERN_VERSION_CLASSIC == GXV_KERN_DATA( version ) )
-#define KERN_IS_NEW( valid ) \
- ( KERN_VERSION_NEW == GXV_KERN_DATA( version ) )
-
-#define KERN_DIALECT( valid ) \
- GXV_KERN_DATA( dialect_request )
-#define KERN_ALLOWS_MS( valid ) \
- ( KERN_DIALECT( valid ) & KERN_DIALECT_MS )
-#define KERN_ALLOWS_APPLE( valid ) \
- ( KERN_DIALECT( valid ) & KERN_DIALECT_APPLE )
-
-#define GXV_KERN_HEADER_SIZE ( KERN_IS_NEW( valid ) ? 8 : 4 )
-#define GXV_KERN_SUBTABLE_HEADER_SIZE ( KERN_IS_NEW( valid ) ? 8 : 6 )
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** SUBTABLE VALIDATORS *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /* ============================= format 0 ============================== */
-
- static void
- gxv_kern_subtable_fmt0_pairs_validate( FT_Bytes table,
- FT_Bytes limit,
- FT_UShort nPairs,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UShort i;
-
- FT_UShort last_gid_left = 0;
- FT_UShort last_gid_right = 0;
-
- FT_UNUSED( limit );
-
-
- GXV_NAME_ENTER( "kern format 0 pairs" );
-
- for ( i = 0; i < nPairs; i++ )
- {
- FT_UShort gid_left;
- FT_UShort gid_right;
- FT_Short kernValue;
-
-
- /* left */
- gid_left = FT_NEXT_USHORT( p );
- gxv_glyphid_validate( gid_left, valid );
-
- /* right */
- gid_right = FT_NEXT_USHORT( p );
- gxv_glyphid_validate( gid_right, valid );
-
- /* Pairs of left and right GIDs must be unique and sorted. */
- GXV_TRACE(( "left gid = %u, right gid = %u\n", gid_left, gid_right ));
- if ( gid_left == last_gid_left )
- {
- if ( last_gid_right < gid_right )
- last_gid_right = gid_right;
- else
- FT_INVALID_DATA;
- }
- else if ( last_gid_left < gid_left )
- {
- last_gid_left = gid_left;
- last_gid_right = gid_right;
- }
- else
- FT_INVALID_DATA;
-
- /* skip the kern value */
- kernValue = FT_NEXT_SHORT( p );
- }
-
- GXV_EXIT;
- }
-
- static void
- gxv_kern_subtable_fmt0_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table + GXV_KERN_SUBTABLE_HEADER_SIZE;
-
- FT_UShort nPairs;
- FT_UShort unitSize;
-
-
- GXV_NAME_ENTER( "kern subtable format 0" );
-
- unitSize = 2 + 2 + 2;
- nPairs = 0;
-
- /* nPairs, searchRange, entrySelector, rangeShift */
- GXV_LIMIT_CHECK( 2 + 2 + 2 + 2 );
- gxv_BinSrchHeader_validate( p, limit, &unitSize, &nPairs, valid );
- p += 2 + 2 + 2 + 2;
-
- gxv_kern_subtable_fmt0_pairs_validate( p, limit, nPairs, valid );
-
- GXV_EXIT;
- }
-
-
- /* ============================= format 1 ============================== */
-
-
- typedef struct GXV_kern_fmt1_StateOptRec_
- {
- FT_UShort valueTable;
- FT_UShort valueTable_length;
-
- } GXV_kern_fmt1_StateOptRec, *GXV_kern_fmt1_StateOptRecData;
-
-
- static void
- gxv_kern_subtable_fmt1_valueTable_load( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- GXV_kern_fmt1_StateOptRecData optdata =
- (GXV_kern_fmt1_StateOptRecData)valid->statetable.optdata;
-
-
- GXV_LIMIT_CHECK( 2 );
- optdata->valueTable = FT_NEXT_USHORT( p );
- }
-
-
- /*
- * passed tables_size covers whole StateTable, including kern fmt1 header
- */
- static void
- gxv_kern_subtable_fmt1_subtable_setup( FT_UShort table_size,
- FT_UShort classTable,
- FT_UShort stateArray,
- FT_UShort entryTable,
- FT_UShort* classTable_length_p,
- FT_UShort* stateArray_length_p,
- FT_UShort* entryTable_length_p,
- GXV_Validator valid )
- {
- FT_UShort o[4];
- FT_UShort *l[4];
- FT_UShort buff[5];
-
- GXV_kern_fmt1_StateOptRecData optdata =
- (GXV_kern_fmt1_StateOptRecData)valid->statetable.optdata;
-
-
- o[0] = classTable;
- o[1] = stateArray;
- o[2] = entryTable;
- o[3] = optdata->valueTable;
- l[0] = classTable_length_p;
- l[1] = stateArray_length_p;
- l[2] = entryTable_length_p;
- l[3] = &(optdata->valueTable_length);
-
- gxv_set_length_by_ushort_offset( o, l, buff, 4, table_size, valid );
- }
-
-
- /*
- * passed table & limit are of whole StateTable, not including subtables
- */
- static void
- gxv_kern_subtable_fmt1_entry_validate(
- FT_Byte state,
- FT_UShort flags,
- GXV_StateTable_GlyphOffsetCPtr glyphOffset_p,
- FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_UShort push;
- FT_UShort dontAdvance;
- FT_UShort valueOffset;
- FT_UShort kernAction;
- FT_UShort kernValue;
-
- FT_UNUSED( state );
- FT_UNUSED( glyphOffset_p );
-
-
- push = (FT_UShort)( ( flags >> 15 ) & 1 );
- dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 );
- valueOffset = (FT_UShort)( flags & 0x3FFF );
-
- {
- GXV_kern_fmt1_StateOptRecData vt_rec =
- (GXV_kern_fmt1_StateOptRecData)valid->statetable.optdata;
- FT_Bytes p;
-
-
- if ( valueOffset < vt_rec->valueTable )
- FT_INVALID_OFFSET;
-
- p = table + valueOffset;
- limit = table + vt_rec->valueTable + vt_rec->valueTable_length;
-
- GXV_LIMIT_CHECK( 2 + 2 );
- kernAction = FT_NEXT_USHORT( p );
- kernValue = FT_NEXT_USHORT( p );
- }
- }
-
-
- static void
- gxv_kern_subtable_fmt1_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- GXV_kern_fmt1_StateOptRec vt_rec;
-
-
- GXV_NAME_ENTER( "kern subtable format 1" );
-
- valid->statetable.optdata =
- &vt_rec;
- valid->statetable.optdata_load_func =
- gxv_kern_subtable_fmt1_valueTable_load;
- valid->statetable.subtable_setup_func =
- gxv_kern_subtable_fmt1_subtable_setup;
- valid->statetable.entry_glyphoffset_fmt =
- GXV_GLYPHOFFSET_NONE;
- valid->statetable.entry_validate_func =
- gxv_kern_subtable_fmt1_entry_validate;
-
- gxv_StateTable_validate( p, limit, valid );
-
- GXV_EXIT;
- }
-
-
- /* ================ Data for Class-Based Subtables 2, 3 ================ */
-
- typedef enum GXV_kern_ClassSpec_
- {
- GXV_KERN_CLS_L = 0,
- GXV_KERN_CLS_R
-
- } GXV_kern_ClassSpec;
-
-
- /* ============================= format 2 ============================== */
-
- /* ---------------------- format 2 specific data ----------------------- */
-
- typedef struct GXV_kern_subtable_fmt2_DataRec_
- {
- FT_UShort rowWidth;
- FT_UShort array;
- FT_UShort offset_min[2];
- FT_UShort offset_max[2];
- const FT_String* class_tag[2];
- GXV_odtect_Range odtect;
-
- } GXV_kern_subtable_fmt2_DataRec, *GXV_kern_subtable_fmt2_Data;
-
-
-#define GXV_KERN_FMT2_DATA( field ) \
- ( ( (GXV_kern_subtable_fmt2_DataRec *) \
- ( GXV_KERN_DATA( subtable_data ) ) )->field )
-
-
- /* -------------------------- utility functions ----------------------- */
-
- static void
- gxv_kern_subtable_fmt2_clstbl_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_kern_ClassSpec spec,
- GXV_Validator valid )
- {
- const FT_String* tag = GXV_KERN_FMT2_DATA( class_tag[spec] );
- GXV_odtect_Range odtect = GXV_KERN_FMT2_DATA( odtect );
-
- FT_Bytes p = table;
- FT_UShort firstGlyph;
- FT_UShort nGlyphs;
-
-
- GXV_NAME_ENTER( "kern format 2 classTable" );
-
- GXV_LIMIT_CHECK( 2 + 2 );
- firstGlyph = FT_NEXT_USHORT( p );
- nGlyphs = FT_NEXT_USHORT( p );
- GXV_TRACE(( " %s firstGlyph=%d, nGlyphs=%d\n",
- tag, firstGlyph, nGlyphs ));
-
- gxv_glyphid_validate( firstGlyph, valid );
- gxv_glyphid_validate( (FT_UShort)( firstGlyph + nGlyphs - 1 ), valid );
-
- gxv_array_getlimits_ushort( p, p + ( 2 * nGlyphs ),
- &( GXV_KERN_FMT2_DATA( offset_min[spec] ) ),
- &( GXV_KERN_FMT2_DATA( offset_max[spec] ) ),
- valid );
-
- gxv_odtect_add_range( table, 2 * nGlyphs, tag, odtect );
-
- GXV_EXIT;
- }
-
-
- static void
- gxv_kern_subtable_fmt2_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- GXV_ODTECT( 3, odtect );
- GXV_kern_subtable_fmt2_DataRec fmt2_rec =
- { 0, 0, { 0, 0 }, { 0, 0 }, { "leftClass", "rightClass" }, NULL };
-
- FT_Bytes p = table + GXV_KERN_SUBTABLE_HEADER_SIZE;
- FT_UShort leftOffsetTable;
- FT_UShort rightOffsetTable;
-
-
- GXV_NAME_ENTER( "kern subtable format 2" );
-
- GXV_ODTECT_INIT( odtect );
- fmt2_rec.odtect = odtect;
- GXV_KERN_DATA( subtable_data ) = &fmt2_rec;
-
- GXV_LIMIT_CHECK( 2 + 2 + 2 + 2 );
- GXV_KERN_FMT2_DATA( rowWidth ) = FT_NEXT_USHORT( p );
- leftOffsetTable = FT_NEXT_USHORT( p );
- rightOffsetTable = FT_NEXT_USHORT( p );
- GXV_KERN_FMT2_DATA( array ) = FT_NEXT_USHORT( p );
-
- GXV_TRACE(( "rowWidth = %d\n", GXV_KERN_FMT2_DATA( rowWidth ) ));
-
-
- GXV_LIMIT_CHECK( leftOffsetTable );
- GXV_LIMIT_CHECK( rightOffsetTable );
- GXV_LIMIT_CHECK( GXV_KERN_FMT2_DATA( array ) );
-
- gxv_kern_subtable_fmt2_clstbl_validate( table + leftOffsetTable, limit,
- GXV_KERN_CLS_L, valid );
-
- gxv_kern_subtable_fmt2_clstbl_validate( table + rightOffsetTable, limit,
- GXV_KERN_CLS_R, valid );
-
- if ( GXV_KERN_FMT2_DATA( offset_min[GXV_KERN_CLS_L] ) +
- GXV_KERN_FMT2_DATA( offset_min[GXV_KERN_CLS_R] )
- < GXV_KERN_FMT2_DATA( array ) )
- FT_INVALID_OFFSET;
-
- gxv_odtect_add_range( table + GXV_KERN_FMT2_DATA( array ),
- GXV_KERN_FMT2_DATA( offset_max[GXV_KERN_CLS_L] )
- + GXV_KERN_FMT2_DATA( offset_max[GXV_KERN_CLS_R] )
- - GXV_KERN_FMT2_DATA( array ),
- "array", odtect );
-
- gxv_odtect_validate( odtect, valid );
-
- GXV_EXIT;
- }
-
-
- /* ============================= format 3 ============================== */
-
- static void
- gxv_kern_subtable_fmt3_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table + GXV_KERN_SUBTABLE_HEADER_SIZE;
- FT_UShort glyphCount;
- FT_Byte kernValueCount;
- FT_Byte leftClassCount;
- FT_Byte rightClassCount;
- FT_Byte flags;
-
-
- GXV_NAME_ENTER( "kern subtable format 3" );
-
- GXV_LIMIT_CHECK( 2 + 1 + 1 + 1 + 1 );
- glyphCount = FT_NEXT_USHORT( p );
- kernValueCount = FT_NEXT_BYTE( p );
- leftClassCount = FT_NEXT_BYTE( p );
- rightClassCount = FT_NEXT_BYTE( p );
- flags = FT_NEXT_BYTE( p );
-
- if ( valid->face->num_glyphs != glyphCount )
- {
- GXV_TRACE(( "maxGID=%d, but glyphCount=%d\n",
- valid->face->num_glyphs, glyphCount ));
- if ( valid->root->level >= FT_VALIDATE_PARANOID )
- FT_INVALID_GLYPH_ID;
- }
-
- /*
- * just skip kernValue[kernValueCount]
- */
- GXV_LIMIT_CHECK( 2 * kernValueCount );
- p += 2 * kernValueCount;
-
- /*
- * check leftClass[gid] < leftClassCount
- */
- {
- FT_Byte min, max;
-
-
- GXV_LIMIT_CHECK( glyphCount );
- gxv_array_getlimits_byte( p, p + glyphCount, &min, &max, valid );
- p += valid->subtable_length;
-
- if ( leftClassCount < max )
- FT_INVALID_DATA;
- }
-
- /*
- * check rightClass[gid] < rightClassCount
- */
- {
- FT_Byte min, max;
-
-
- GXV_LIMIT_CHECK( glyphCount );
- gxv_array_getlimits_byte( p, p + glyphCount, &min, &max, valid );
- p += valid->subtable_length;
-
- if ( rightClassCount < max )
- FT_INVALID_DATA;
- }
-
- /*
- * check kernIndex[i, j] < kernValueCount
- */
- {
- FT_UShort i, j;
-
-
- for ( i = 0; i < leftClassCount; i++ )
- {
- for ( j = 0; j < rightClassCount; j++ )
- {
- GXV_LIMIT_CHECK( 1 );
- if ( kernValueCount < FT_NEXT_BYTE( p ) )
- FT_INVALID_OFFSET;
- }
- }
- }
-
- valid->subtable_length = p - table;
-
- GXV_EXIT;
- }
-
-
- static FT_Bool
- gxv_kern_coverage_new_apple_validate( FT_UShort coverage,
- FT_UShort* format,
- GXV_Validator valid )
- {
- /* new Apple-dialect */
- FT_Bool kernVertical;
- FT_Bool kernCrossStream;
- FT_Bool kernVariation;
-
- FT_UNUSED( valid );
-
-
- /* reserved bits = 0 */
- if ( coverage & 0x1FFC )
- return 0;
-
- kernVertical = FT_BOOL( ( coverage >> 15 ) & 1 );
- kernCrossStream = FT_BOOL( ( coverage >> 14 ) & 1 );
- kernVariation = FT_BOOL( ( coverage >> 13 ) & 1 );
-
- *format = (FT_UShort)( coverage & 0x0003 );
-
- GXV_TRACE(( "new Apple-dialect: "
- "horizontal=%d, cross-stream=%d, variation=%d, format=%d\n",
- !kernVertical, kernCrossStream, kernVariation, *format ));
-
- GXV_TRACE(( "kerning values in Apple format subtable are ignored\n" ));
-
- return 1;
- }
-
-
- static FT_Bool
- gxv_kern_coverage_classic_apple_validate( FT_UShort coverage,
- FT_UShort* format,
- GXV_Validator valid )
- {
- /* classic Apple-dialect */
- FT_Bool horizontal;
- FT_Bool cross_stream;
-
-
- /* check expected flags, but don't check if MS-dialect is impossible */
- if ( !( coverage & 0xFD00 ) && KERN_ALLOWS_MS( valid ) )
- return 0;
-
- /* reserved bits = 0 */
- if ( coverage & 0x02FC )
- return 0;
-
- horizontal = FT_BOOL( ( coverage >> 15 ) & 1 );
- cross_stream = FT_BOOL( ( coverage >> 13 ) & 1 );
-
- *format = (FT_UShort)( coverage & 0x0003 );
-
- GXV_TRACE(( "classic Apple-dialect: "
- "horizontal=%d, cross-stream=%d, format=%d\n",
- horizontal, cross_stream, *format ));
-
- /* format 1 requires GX State Machine, too new for classic */
- if ( *format == 1 )
- return 0;
-
- GXV_TRACE(( "kerning values in Apple format subtable are ignored\n" ));
-
- return 1;
- }
-
-
- static FT_Bool
- gxv_kern_coverage_classic_microsoft_validate( FT_UShort coverage,
- FT_UShort* format,
- GXV_Validator valid )
- {
- /* classic Microsoft-dialect */
- FT_Bool horizontal;
- FT_Bool minimum;
- FT_Bool cross_stream;
- FT_Bool override;
-
- FT_UNUSED( valid );
-
-
- /* reserved bits = 0 */
- if ( coverage & 0xFDF0 )
- return 0;
-
- horizontal = FT_BOOL( coverage & 1 );
- minimum = FT_BOOL( ( coverage >> 1 ) & 1 );
- cross_stream = FT_BOOL( ( coverage >> 2 ) & 1 );
- override = FT_BOOL( ( coverage >> 3 ) & 1 );
-
- *format = (FT_UShort)( ( coverage >> 8 ) & 0x0003 );
-
- GXV_TRACE(( "classic Microsoft-dialect: "
- "horizontal=%d, minimum=%d, cross-stream=%d, "
- "override=%d, format=%d\n",
- horizontal, minimum, cross_stream, override, *format ));
-
- if ( *format == 2 )
- GXV_TRACE((
- "kerning values in Microsoft format 2 subtable are ignored\n" ));
-
- return 1;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** MAIN *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static GXV_kern_Dialect
- gxv_kern_coverage_validate( FT_UShort coverage,
- FT_UShort* format,
- GXV_Validator valid )
- {
- GXV_kern_Dialect result = KERN_DIALECT_UNKNOWN;
-
-
- GXV_NAME_ENTER( "validating coverage" );
-
- GXV_TRACE(( "interprete coverage 0x%04x by Apple style\n", coverage ));
-
- if ( KERN_IS_NEW( valid ) )
- {
- if ( gxv_kern_coverage_new_apple_validate( coverage,
- format,
- valid ) )
- {
- result = KERN_DIALECT_APPLE;
- goto Exit;
- }
- }
-
- if ( KERN_IS_CLASSIC( valid ) && KERN_ALLOWS_APPLE( valid ) )
- {
- if ( gxv_kern_coverage_classic_apple_validate( coverage,
- format,
- valid ) )
- {
- result = KERN_DIALECT_APPLE;
- goto Exit;
- }
- }
-
- if ( KERN_IS_CLASSIC( valid ) && KERN_ALLOWS_MS( valid ) )
- {
- if ( gxv_kern_coverage_classic_microsoft_validate( coverage,
- format,
- valid ) )
- {
- result = KERN_DIALECT_MS;
- goto Exit;
- }
- }
-
- GXV_TRACE(( "cannot interprete coverage, broken kern subtable\n" ));
-
- Exit:
- GXV_EXIT;
- return result;
- }
-
-
- static void
- gxv_kern_subtable_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UShort version = 0; /* MS only: subtable version, unused */
- FT_ULong length; /* MS: 16bit, Apple: 32bit*/
- FT_UShort coverage;
- FT_UShort tupleIndex = 0; /* Apple only */
- FT_UShort u16[2];
- FT_UShort format = 255; /* subtable format */
-
-
- GXV_NAME_ENTER( "kern subtable" );
-
- GXV_LIMIT_CHECK( 2 + 2 + 2 );
- u16[0] = FT_NEXT_USHORT( p ); /* Apple: length_hi MS: version */
- u16[1] = FT_NEXT_USHORT( p ); /* Apple: length_lo MS: length */
- coverage = FT_NEXT_USHORT( p );
-
- switch ( gxv_kern_coverage_validate( coverage, &format, valid ) )
- {
- case KERN_DIALECT_MS:
- version = u16[0];
- length = u16[1];
- tupleIndex = 0;
- GXV_TRACE(( "Subtable version = %d\n", version ));
- GXV_TRACE(( "Subtable length = %d\n", length ));
- break;
-
- case KERN_DIALECT_APPLE:
- version = 0;
- length = ( u16[0] << 16 ) + u16[1];
- tupleIndex = 0;
- GXV_TRACE(( "Subtable length = %d\n", length ));
-
- if ( KERN_IS_NEW( valid ) )
- {
- GXV_LIMIT_CHECK( 2 );
- tupleIndex = FT_NEXT_USHORT( p );
- GXV_TRACE(( "Subtable tupleIndex = %d\n", tupleIndex ));
- }
- break;
-
- default:
- length = u16[1];
- GXV_TRACE(( "cannot detect subtable dialect, "
- "just skip %d byte\n", length ));
- goto Exit;
- }
-
- /* formats 1, 2, 3 require the position of the start of this subtable */
- if ( format == 0 )
- gxv_kern_subtable_fmt0_validate( table, table + length, valid );
- else if ( format == 1 )
- gxv_kern_subtable_fmt1_validate( table, table + length, valid );
- else if ( format == 2 )
- gxv_kern_subtable_fmt2_validate( table, table + length, valid );
- else if ( format == 3 )
- gxv_kern_subtable_fmt3_validate( table, table + length, valid );
- else
- FT_INVALID_DATA;
-
- Exit:
- valid->subtable_length = length;
- GXV_EXIT;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** kern TABLE *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static void
- gxv_kern_validate_generic( FT_Bytes table,
- FT_Face face,
- FT_Bool classic_only,
- GXV_kern_Dialect dialect_request,
- FT_Validator ftvalid )
- {
- GXV_ValidatorRec validrec;
- GXV_Validator valid = &validrec;
-
- GXV_kern_DataRec kernrec;
- GXV_kern_Data kern = &kernrec;
-
- FT_Bytes p = table;
- FT_Bytes limit = 0;
-
- FT_ULong nTables = 0;
- FT_UInt i;
-
-
- valid->root = ftvalid;
- valid->table_data = kern;
- valid->face = face;
-
- FT_TRACE3(( "validating `kern' table\n" ));
- GXV_INIT;
- KERN_DIALECT( valid ) = dialect_request;
-
- GXV_LIMIT_CHECK( 2 );
- GXV_KERN_DATA( version ) = (GXV_kern_Version)FT_NEXT_USHORT( p );
- GXV_TRACE(( "version 0x%04x (higher 16bit)\n",
- GXV_KERN_DATA( version ) ));
-
- if ( 0x0001 < GXV_KERN_DATA( version ) )
- FT_INVALID_FORMAT;
- else if ( KERN_IS_CLASSIC( valid ) )
- {
- GXV_LIMIT_CHECK( 2 );
- nTables = FT_NEXT_USHORT( p );
- }
- else if ( KERN_IS_NEW( valid ) )
- {
- if ( classic_only )
- FT_INVALID_FORMAT;
-
- if ( 0x0000 != FT_NEXT_USHORT( p ) )
- FT_INVALID_FORMAT;
-
- GXV_LIMIT_CHECK( 4 );
- nTables = FT_NEXT_ULONG( p );
- }
-
- for ( i = 0; i < nTables; i++ )
- {
- GXV_TRACE(( "validating subtable %d/%d\n", i, nTables ));
- /* p should be 32bit-aligned? */
- gxv_kern_subtable_validate( p, 0, valid );
- p += valid->subtable_length;
- }
-
- FT_TRACE4(( "\n" ));
- }
-
-
- FT_LOCAL_DEF( void )
- gxv_kern_validate( FT_Bytes table,
- FT_Face face,
- FT_Validator ftvalid )
- {
- gxv_kern_validate_generic( table, face, 0, KERN_DIALECT_ANY, ftvalid );
- }
-
-
- FT_LOCAL_DEF( void )
- gxv_kern_validate_classic( FT_Bytes table,
- FT_Face face,
- FT_Int dialect_flags,
- FT_Validator ftvalid )
- {
- GXV_kern_Dialect dialect_request;
-
-
- dialect_request = (GXV_kern_Dialect)dialect_flags;
- gxv_kern_validate_generic( table, face, 1, dialect_request, ftvalid );
- }
-
-
-/* END */