--- a/misc/libfreetype/src/gxvalid/gxvmort.c Thu Jul 25 23:16:06 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,285 +0,0 @@
-/***************************************************************************/
-/* */
-/* gxvmort.c */
-/* */
-/* TrueTypeGX/AAT mort table validation (body). */
-/* */
-/* Copyright 2005 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 "gxvmort.h"
-#include "gxvfeat.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_gxvmort
-
-
- static void
- gxv_mort_feature_validate( GXV_mort_feature f,
- GXV_Validator valid )
- {
- if ( f->featureType >= gxv_feat_registry_length )
- {
- GXV_TRACE(( "featureType %d is out of registered range, "
- "setting %d is unchecked\n",
- f->featureType, f->featureSetting ));
- if ( valid->root->level >= FT_VALIDATE_PARANOID )
- FT_INVALID_DATA;
- }
- else if ( !gxv_feat_registry[f->featureType].existence )
- {
- GXV_TRACE(( "featureType %d is within registered area "
- "but undefined, setting %d is unchecked\n",
- f->featureType, f->featureSetting ));
- if ( valid->root->level >= FT_VALIDATE_PARANOID )
- FT_INVALID_DATA;
- }
- else
- {
- FT_Byte nSettings_max;
-
-
- /* nSettings in gxvfeat.c is halved for exclusive on/off settings */
- nSettings_max = gxv_feat_registry[f->featureType].nSettings;
- if ( gxv_feat_registry[f->featureType].exclusive )
- nSettings_max = (FT_Byte)( 2 * nSettings_max );
-
- GXV_TRACE(( "featureType %d is registered", f->featureType ));
- GXV_TRACE(( "setting %d", f->featureSetting ));
-
- if ( f->featureSetting > nSettings_max )
- {
- GXV_TRACE(( "out of defined range %d", nSettings_max ));
- if ( valid->root->level >= FT_VALIDATE_PARANOID )
- FT_INVALID_DATA;
- }
- GXV_TRACE(( "\n" ));
- }
-
- /* TODO: enableFlags must be unique value in specified chain? */
- }
-
-
- /*
- * nFeatureFlags is typed to FT_ULong to accept that in
- * mort (typed FT_UShort) and morx (typed FT_ULong).
- */
- FT_LOCAL_DEF( void )
- gxv_mort_featurearray_validate( FT_Bytes table,
- FT_Bytes limit,
- FT_ULong nFeatureFlags,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- FT_ULong i;
-
- GXV_mort_featureRec f = GXV_MORT_FEATURE_OFF;
-
-
- GXV_NAME_ENTER( "mort feature list" );
- for ( i = 0; i < nFeatureFlags; i++ )
- {
- GXV_LIMIT_CHECK( 2 + 2 + 4 + 4 );
- f.featureType = FT_NEXT_USHORT( p );
- f.featureSetting = FT_NEXT_USHORT( p );
- f.enableFlags = FT_NEXT_ULONG( p );
- f.disableFlags = FT_NEXT_ULONG( p );
-
- gxv_mort_feature_validate( &f, valid );
- }
-
- if ( !IS_GXV_MORT_FEATURE_OFF( f ) )
- FT_INVALID_DATA;
-
- valid->subtable_length = p - table;
- GXV_EXIT;
- }
-
-
- FT_LOCAL_DEF( void )
- gxv_mort_coverage_validate( FT_UShort coverage,
- GXV_Validator valid )
- {
- FT_UNUSED( valid );
-
- if ( coverage & 0x8000U )
- GXV_TRACE(( " this subtable is for vertical text only\n" ));
- else
- GXV_TRACE(( " this subtable is for horizontal text only\n" ));
-
- if ( coverage & 0x4000 )
- GXV_TRACE(( " this subtable is applied to glyph array "
- "in descending order\n" ));
- else
- GXV_TRACE(( " this subtable is applied to glyph array "
- "in ascending order\n" ));
-
- if ( coverage & 0x2000 )
- GXV_TRACE(( " this subtable is forcibly applied to "
- "vertical/horizontal text\n" ));
-
- if ( coverage & 0x1FF8 )
- GXV_TRACE(( " coverage has non-zero bits in reserved area\n" ));
- }
-
-
- static void
- gxv_mort_subtables_validate( FT_Bytes table,
- FT_Bytes limit,
- FT_UShort nSubtables,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
-
- GXV_Validate_Func fmt_funcs_table[] =
- {
- gxv_mort_subtable_type0_validate, /* 0 */
- gxv_mort_subtable_type1_validate, /* 1 */
- gxv_mort_subtable_type2_validate, /* 2 */
- NULL, /* 3 */
- gxv_mort_subtable_type4_validate, /* 4 */
- gxv_mort_subtable_type5_validate, /* 5 */
-
- };
-
- GXV_Validate_Func func;
- FT_UShort i;
-
-
- GXV_NAME_ENTER( "subtables in a chain" );
-
- for ( i = 0; i < nSubtables; i++ )
- {
- FT_UShort length;
- FT_UShort coverage;
- FT_ULong subFeatureFlags;
- FT_UInt type;
- FT_UInt rest;
-
-
- GXV_LIMIT_CHECK( 2 + 2 + 4 );
- length = FT_NEXT_USHORT( p );
- coverage = FT_NEXT_USHORT( p );
- subFeatureFlags = FT_NEXT_ULONG( p );
-
- GXV_TRACE(( "validating chain subtable %d/%d (%d bytes)\n",
- i + 1, nSubtables, length ));
- type = coverage & 0x0007;
- rest = length - ( 2 + 2 + 4 );
-
- GXV_LIMIT_CHECK( rest );
- gxv_mort_coverage_validate( coverage, valid );
-
- if ( type > 5 )
- FT_INVALID_FORMAT;
-
- func = fmt_funcs_table[type];
- if ( func == NULL )
- GXV_TRACE(( "morx type %d is reserved\n", type ));
-
- func( p, p + rest, valid );
-
- p += rest;
- }
-
- valid->subtable_length = p - table;
-
- GXV_EXIT;
- }
-
-
- static void
- gxv_mort_chain_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- FT_ULong defaultFlags;
- FT_ULong chainLength;
- FT_UShort nFeatureFlags;
- FT_UShort nSubtables;
-
-
- GXV_NAME_ENTER( "mort chain header" );
-
- GXV_LIMIT_CHECK( 4 + 4 + 2 + 2 );
- defaultFlags = FT_NEXT_ULONG( p );
- chainLength = FT_NEXT_ULONG( p );
- nFeatureFlags = FT_NEXT_USHORT( p );
- nSubtables = FT_NEXT_USHORT( p );
-
- gxv_mort_featurearray_validate( p, table + chainLength,
- nFeatureFlags, valid );
- p += valid->subtable_length;
- gxv_mort_subtables_validate( p, table + chainLength, nSubtables, valid );
- valid->subtable_length = chainLength;
-
- GXV_EXIT;
- }
-
-
- FT_LOCAL_DEF( void )
- gxv_mort_validate( FT_Bytes table,
- FT_Face face,
- FT_Validator ftvalid )
- {
- GXV_ValidatorRec validrec;
- GXV_Validator valid = &validrec;
- FT_Bytes p = table;
- FT_Bytes limit = 0;
- FT_ULong version;
- FT_ULong nChains;
- FT_ULong i;
-
-
- valid->root = ftvalid;
- valid->face = face;
- limit = valid->root->limit;
-
- FT_TRACE3(( "validating `mort' table\n" ));
- GXV_INIT;
-
- GXV_LIMIT_CHECK( 4 + 4 );
- version = FT_NEXT_ULONG( p );
- nChains = FT_NEXT_ULONG( p );
-
- if (version != 0x00010000UL)
- FT_INVALID_FORMAT;
-
- for ( i = 0; i < nChains; i++ )
- {
- GXV_TRACE(( "validating chain %d/%d\n", i + 1, nChains ));
- GXV_32BIT_ALIGNMENT_VALIDATE( p - table );
- gxv_mort_chain_validate( p, limit, valid );
- p += valid->subtable_length;
- }
-
- FT_TRACE4(( "\n" ));
- }
-
-
-/* END */