+++ /dev/null
-/***************************************************************************/
-/* */
-/* gxvfeat.c */
-/* */
-/* TrueTypeGX/AAT feat table validation (body). */
-/* */
-/* Copyright 2004-2016 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 gxvalid )
- {
- 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 ));
- GXV_SET_ERR_IF_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 ));
- GXV_SET_ERR_IF_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 ( gxvalid->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 ( gxvalid->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 ( gxvalid->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 gxvalid )
- {
- 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,
- gxvalid );
-
- GXV_EXIT;
- }
-
-
- static void
- gxv_feat_setting_validate( FT_Bytes table,
- FT_Bytes limit,
- FT_Bool exclusive,
- GXV_Validator gxvalid )
- {
- 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 & 1 ) == 0 )
- FT_INVALID_DATA;
-
- gxv_feat_name_index_validate( p, limit, gxvalid );
-
- GXV_FEAT_DATA( setting ) = setting;
-
- GXV_EXIT;
- }
-
-
- static void
- gxv_feat_name_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator gxvalid )
- {
- 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 ( ( featureFlags & GXV_FEAT_MASK_UNUSED ) == 0 )
- GXV_SET_ERR_IF_PARANOID( 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, gxvalid );
-
- gxv_feat_name_index_validate( p, limit, gxvalid );
-
- p = gxvalid->root->base + settingTable;
- for ( last_setting = -1, i = 0; i < nSettings; i++ )
- {
- gxv_feat_setting_validate( p, limit, exclusive, gxvalid );
-
- if ( (FT_Int)GXV_FEAT_DATA( setting ) <= last_setting )
- GXV_SET_ERR_IF_PARANOID( 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 gxvalidrec;
- GXV_Validator gxvalid = &gxvalidrec;
-
- 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;
-
-
- gxvalid->root = ftvalid;
- gxvalid->table_data = feat;
- gxvalid->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 ( !( IS_PARANOID_VALIDATION ) )
- 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, gxvalid );
-
- if ( (FT_Int)GXV_FEAT_DATA( feature ) <= last_feature )
- GXV_SET_ERR_IF_PARANOID( FT_INVALID_FORMAT );
-
- last_feature = GXV_FEAT_DATA( feature );
- p += 2 + 2 + 4 + 2 + 2;
- }
-
- FT_TRACE4(( "\n" ));
- }
-
-
-/* END */
projects / reactos.git / blobdiff