diff -r 92af50454cf2 -r 8054d9d775fd misc/libfreetype/src/gxvalid/gxvfeat.c --- a/misc/libfreetype/src/gxvalid/gxvfeat.c Fri Oct 11 11:55:31 2013 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,344 +0,0 @@ -/***************************************************************************/ -/* */ -/* gxvfeat.c */ -/* */ -/* TrueTypeGX/AAT feat table validation (body). */ -/* */ -/* Copyright 2004, 2005, 2008 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 "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_gxvfeat - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** Data and Types *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - typedef struct GXV_feat_DataRec_ - { - FT_UInt reserved_size; - FT_UShort feature; - FT_UShort setting; - - } GXV_feat_DataRec, *GXV_feat_Data; - - -#define GXV_FEAT_DATA( field ) GXV_TABLE_DATA( feat, field ) - - - typedef enum GXV_FeatureFlagsMask_ - { - GXV_FEAT_MASK_EXCLUSIVE_SETTINGS = 0x8000U, - GXV_FEAT_MASK_DYNAMIC_DEFAULT = 0x4000, - GXV_FEAT_MASK_UNUSED = 0x3F00, - GXV_FEAT_MASK_DEFAULT_SETTING = 0x00FF - - } GXV_FeatureFlagsMask; - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** UTILITY FUNCTIONS *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - static void - gxv_feat_registry_validate( FT_UShort feature, - FT_UShort nSettings, - FT_Bool exclusive, - GXV_Validator valid ) - { - GXV_NAME_ENTER( "feature in registry" ); - - GXV_TRACE(( " (feature = %u)\n", feature )); - - if ( feature >= gxv_feat_registry_length ) - { - GXV_TRACE(( "feature number %d is out of range %d\n", - feature, gxv_feat_registry_length )); - if ( valid->root->level == FT_VALIDATE_PARANOID ) - FT_INVALID_DATA; - goto Exit; - } - - if ( gxv_feat_registry[feature].existence == 0 ) - { - GXV_TRACE(( "feature number %d is in defined range but doesn't exist\n", - feature )); - if ( valid->root->level == FT_VALIDATE_PARANOID ) - FT_INVALID_DATA; - goto Exit; - } - - if ( gxv_feat_registry[feature].apple_reserved ) - { - /* Don't use here. Apple is reserved. */ - GXV_TRACE(( "feature number %d is reserved by Apple\n", feature )); - if ( valid->root->level >= FT_VALIDATE_TIGHT ) - FT_INVALID_DATA; - } - - if ( nSettings != gxv_feat_registry[feature].nSettings ) - { - GXV_TRACE(( "feature %d: nSettings %d != defined nSettings %d\n", - feature, nSettings, - gxv_feat_registry[feature].nSettings )); - if ( valid->root->level >= FT_VALIDATE_TIGHT ) - FT_INVALID_DATA; - } - - if ( exclusive != gxv_feat_registry[feature].exclusive ) - { - GXV_TRACE(( "exclusive flag %d differs from predefined value\n", - exclusive )); - if ( valid->root->level >= FT_VALIDATE_TIGHT ) - FT_INVALID_DATA; - } - - Exit: - GXV_EXIT; - } - - - static void - gxv_feat_name_index_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - - FT_Short nameIndex; - - - GXV_NAME_ENTER( "nameIndex" ); - - GXV_LIMIT_CHECK( 2 ); - nameIndex = FT_NEXT_SHORT ( p ); - GXV_TRACE(( " (nameIndex = %d)\n", nameIndex )); - - gxv_sfntName_validate( (FT_UShort)nameIndex, - 255, - 32768U, - valid ); - - GXV_EXIT; - } - - - static void - gxv_feat_setting_validate( FT_Bytes table, - FT_Bytes limit, - FT_Bool exclusive, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_UShort setting; - - - GXV_NAME_ENTER( "setting" ); - - GXV_LIMIT_CHECK( 2 ); - - setting = FT_NEXT_USHORT( p ); - - /* If we have exclusive setting, the setting should be odd. */ - if ( exclusive && ( setting % 2 ) == 0 ) - FT_INVALID_DATA; - - gxv_feat_name_index_validate( p, limit, valid ); - - GXV_FEAT_DATA( setting ) = setting; - - GXV_EXIT; - } - - - static void - gxv_feat_name_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_UInt reserved_size = GXV_FEAT_DATA( reserved_size ); - - FT_UShort feature; - FT_UShort nSettings; - FT_ULong settingTable; - FT_UShort featureFlags; - - FT_Bool exclusive; - FT_Int last_setting; - FT_UInt i; - - - GXV_NAME_ENTER( "name" ); - - /* feature + nSettings + settingTable + featureFlags */ - GXV_LIMIT_CHECK( 2 + 2 + 4 + 2 ); - - feature = FT_NEXT_USHORT( p ); - GXV_FEAT_DATA( feature ) = feature; - - nSettings = FT_NEXT_USHORT( p ); - settingTable = FT_NEXT_ULONG ( p ); - featureFlags = FT_NEXT_USHORT( p ); - - if ( settingTable < reserved_size ) - FT_INVALID_OFFSET; - - if ( valid->root->level == FT_VALIDATE_PARANOID && - ( featureFlags & GXV_FEAT_MASK_UNUSED ) == 0 ) - FT_INVALID_DATA; - - exclusive = FT_BOOL( featureFlags & GXV_FEAT_MASK_EXCLUSIVE_SETTINGS ); - if ( exclusive ) - { - FT_Byte dynamic_default; - - - if ( featureFlags & GXV_FEAT_MASK_DYNAMIC_DEFAULT ) - dynamic_default = (FT_Byte)( featureFlags & - GXV_FEAT_MASK_DEFAULT_SETTING ); - else - dynamic_default = 0; - - /* If exclusive, check whether default setting is in the range. */ - if ( !( dynamic_default < nSettings ) ) - FT_INVALID_FORMAT; - } - - gxv_feat_registry_validate( feature, nSettings, exclusive, valid ); - - gxv_feat_name_index_validate( p, limit, valid ); - - p = valid->root->base + settingTable; - for ( last_setting = -1, i = 0; i < nSettings; i++ ) - { - gxv_feat_setting_validate( p, limit, exclusive, valid ); - - if ( valid->root->level == FT_VALIDATE_PARANOID && - (FT_Int)GXV_FEAT_DATA( setting ) <= last_setting ) - FT_INVALID_FORMAT; - - last_setting = (FT_Int)GXV_FEAT_DATA( setting ); - /* setting + nameIndex */ - p += ( 2 + 2 ); - } - - GXV_EXIT; - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** feat TABLE *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - FT_LOCAL_DEF( void ) - gxv_feat_validate( FT_Bytes table, - FT_Face face, - FT_Validator ftvalid ) - { - GXV_ValidatorRec validrec; - GXV_Validator valid = &validrec; - - GXV_feat_DataRec featrec; - GXV_feat_Data feat = &featrec; - - FT_Bytes p = table; - FT_Bytes limit = 0; - - FT_UInt featureNameCount; - - FT_UInt i; - FT_Int last_feature; - - - valid->root = ftvalid; - valid->table_data = feat; - valid->face = face; - - FT_TRACE3(( "validating `feat' table\n" )); - GXV_INIT; - - feat->reserved_size = 0; - - /* version + featureNameCount + none_0 + none_1 */ - GXV_LIMIT_CHECK( 4 + 2 + 2 + 4 ); - feat->reserved_size += 4 + 2 + 2 + 4; - - if ( FT_NEXT_ULONG( p ) != 0x00010000UL ) /* Version */ - FT_INVALID_FORMAT; - - featureNameCount = FT_NEXT_USHORT( p ); - GXV_TRACE(( " (featureNameCount = %d)\n", featureNameCount )); - - if ( valid->root->level != FT_VALIDATE_PARANOID ) - p += 6; /* skip (none) and (none) */ - else - { - if ( FT_NEXT_USHORT( p ) != 0 ) - FT_INVALID_DATA; - - if ( FT_NEXT_ULONG( p ) != 0 ) - FT_INVALID_DATA; - } - - feat->reserved_size += featureNameCount * ( 2 + 2 + 4 + 2 + 2 ); - - for ( last_feature = -1, i = 0; i < featureNameCount; i++ ) - { - gxv_feat_name_validate( p, limit, valid ); - - if ( valid->root->level == FT_VALIDATE_PARANOID && - (FT_Int)GXV_FEAT_DATA( feature ) <= last_feature ) - FT_INVALID_FORMAT; - - last_feature = GXV_FEAT_DATA( feature ); - p += 2 + 2 + 4 + 2 + 2; - } - - FT_TRACE4(( "\n" )); - } - - -/* END */