diff -r a501f5ec7b34 -r 0f5961910e27 misc/libfreetype/src/gxvalid/gxvmort.c --- a/misc/libfreetype/src/gxvalid/gxvmort.c Tue Jul 16 11:14:27 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 */