diff -r a501f5ec7b34 -r 0f5961910e27 misc/libfreetype/src/gxvalid/gxvmort1.c --- a/misc/libfreetype/src/gxvalid/gxvmort1.c Tue Jul 16 11:14:27 2013 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,258 +0,0 @@ -/***************************************************************************/ -/* */ -/* gxvmort1.c */ -/* */ -/* TrueTypeGX/AAT mort table validation */ -/* body for type1 (Contextual Substitution) subtable. */ -/* */ -/* Copyright 2005, 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 "gxvmort.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 - - - typedef struct GXV_mort_subtable_type1_StateOptRec_ - { - FT_UShort substitutionTable; - FT_UShort substitutionTable_length; - - } GXV_mort_subtable_type1_StateOptRec, - *GXV_mort_subtable_type1_StateOptRecData; - -#define GXV_MORT_SUBTABLE_TYPE1_HEADER_SIZE \ - ( GXV_STATETABLE_HEADER_SIZE + 2 ) - - - static void - gxv_mort_subtable_type1_substitutionTable_load( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - - GXV_mort_subtable_type1_StateOptRecData optdata = - (GXV_mort_subtable_type1_StateOptRecData)valid->statetable.optdata; - - - GXV_LIMIT_CHECK( 2 ); - optdata->substitutionTable = FT_NEXT_USHORT( p ); - } - - - static void - gxv_mort_subtable_type1_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_mort_subtable_type1_StateOptRecData optdata = - (GXV_mort_subtable_type1_StateOptRecData)valid->statetable.optdata; - - - o[0] = classTable; - o[1] = stateArray; - o[2] = entryTable; - o[3] = optdata->substitutionTable; - l[0] = classTable_length_p; - l[1] = stateArray_length_p; - l[2] = entryTable_length_p; - l[3] = &( optdata->substitutionTable_length ); - - gxv_set_length_by_ushort_offset( o, l, buff, 4, table_size, valid ); - } - - - static void - gxv_mort_subtable_type1_offset_to_subst_validate( - FT_Short wordOffset, - const FT_String* tag, - FT_Byte state, - GXV_Validator valid ) - { - FT_UShort substTable; - FT_UShort substTable_limit; - FT_UShort min_gid; - FT_UShort max_gid; - - FT_UNUSED( tag ); - FT_UNUSED( state ); - - - substTable = - ((GXV_mort_subtable_type1_StateOptRec *) - (valid->statetable.optdata))->substitutionTable; - substTable_limit = - (FT_UShort)( substTable + - ((GXV_mort_subtable_type1_StateOptRec *) - (valid->statetable.optdata))->substitutionTable_length ); - - min_gid = (FT_UShort)( ( substTable - wordOffset * 2 ) / 2 ); - max_gid = (FT_UShort)( ( substTable_limit - wordOffset * 2 ) / 2 ); - max_gid = (FT_UShort)( FT_MAX( max_gid, valid->face->num_glyphs ) ); - - /* XXX: check range? */ - - /* TODO: min_gid & max_gid comparison with ClassTable contents */ - } - - - static void - gxv_mort_subtable_type1_entry_validate( - FT_Byte state, - FT_UShort flags, - GXV_StateTable_GlyphOffsetCPtr glyphOffset_p, - FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_UShort setMark; - FT_UShort dontAdvance; - FT_UShort reserved; - FT_Short markOffset; - FT_Short currentOffset; - - FT_UNUSED( table ); - FT_UNUSED( limit ); - - - setMark = (FT_UShort)( flags >> 15 ); - dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 ); - reserved = (FT_Short)( flags & 0x3FFF ); - - markOffset = (FT_Short)( glyphOffset_p->ul >> 16 ); - currentOffset = (FT_Short)( glyphOffset_p->ul ); - - if ( 0 < reserved ) - { - GXV_TRACE(( " non-zero bits found in reserved range\n" )); - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_DATA; - } - - gxv_mort_subtable_type1_offset_to_subst_validate( markOffset, - "markOffset", - state, - valid ); - - gxv_mort_subtable_type1_offset_to_subst_validate( currentOffset, - "currentOffset", - state, - valid ); - } - - - static void - gxv_mort_subtable_type1_substTable_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_UShort num_gids = (FT_UShort)( - ((GXV_mort_subtable_type1_StateOptRec *) - (valid->statetable.optdata))->substitutionTable_length / 2 ); - FT_UShort i; - - - GXV_NAME_ENTER( "validating contents of substitutionTable" ); - for ( i = 0; i < num_gids ; i ++ ) - { - FT_UShort dst_gid; - - - GXV_LIMIT_CHECK( 2 ); - dst_gid = FT_NEXT_USHORT( p ); - - if ( dst_gid >= 0xFFFFU ) - continue; - - if ( dst_gid > valid->face->num_glyphs ) - { - GXV_TRACE(( "substTable include too large gid[%d]=%d >" - " max defined gid #%d\n", - i, dst_gid, valid->face->num_glyphs )); - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_GLYPH_ID; - } - } - - GXV_EXIT; - } - - - /* - * subtable for Contextual glyph substitution is a modified StateTable. - * In addition to classTable, stateArray, and entryTable, the field - * `substitutionTable' is added. - */ - FT_LOCAL_DEF( void ) - gxv_mort_subtable_type1_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - - GXV_mort_subtable_type1_StateOptRec st_rec; - - - GXV_NAME_ENTER( "mort chain subtable type1 (Contextual Glyph Subst)" ); - - GXV_LIMIT_CHECK( GXV_MORT_SUBTABLE_TYPE1_HEADER_SIZE ); - - valid->statetable.optdata = - &st_rec; - valid->statetable.optdata_load_func = - gxv_mort_subtable_type1_substitutionTable_load; - valid->statetable.subtable_setup_func = - gxv_mort_subtable_type1_subtable_setup; - valid->statetable.entry_glyphoffset_fmt = - GXV_GLYPHOFFSET_ULONG; - valid->statetable.entry_validate_func = - - gxv_mort_subtable_type1_entry_validate; - gxv_StateTable_validate( p, limit, valid ); - - gxv_mort_subtable_type1_substTable_validate( - table + st_rec.substitutionTable, - table + st_rec.substitutionTable + st_rec.substitutionTable_length, - valid ); - - GXV_EXIT; - } - - -/* END */