--- a/misc/libfreetype/src/gxvalid/gxvjust.c Fri Oct 11 11:55:31 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,630 +0,0 @@
-/***************************************************************************/
-/* */
-/* gxvjust.c */
-/* */
-/* TrueTypeGX/AAT just 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 "gxvalid.h"
-#include "gxvcommn.h"
-
-#include FT_SFNT_NAMES_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_gxvjust
-
- /*
- * referred `just' table format specification:
- * http://developer.apple.com/fonts/TTRefMan/RM06/Chap6just.html
- * last updated 2000.
- * ----------------------------------------------
- * [JUST HEADER]: GXV_JUST_HEADER_SIZE
- * version (fixed: 32bit) = 0x00010000
- * format (uint16: 16bit) = 0 is only defined (2000)
- * horizOffset (uint16: 16bit)
- * vertOffset (uint16: 16bit)
- * ----------------------------------------------
- */
-
- typedef struct GXV_just_DataRec_
- {
- FT_UShort wdc_offset_max;
- FT_UShort wdc_offset_min;
- FT_UShort pc_offset_max;
- FT_UShort pc_offset_min;
-
- } GXV_just_DataRec, *GXV_just_Data;
-
-
-#define GXV_JUST_DATA( a ) GXV_TABLE_DATA( just, a )
-
-
- static void
- gxv_just_wdp_entry_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- FT_ULong justClass;
- FT_Fixed beforeGrowLimit;
- FT_Fixed beforeShrinkGrowLimit;
- FT_Fixed afterGrowLimit;
- FT_Fixed afterShrinkGrowLimit;
- FT_UShort growFlags;
- FT_UShort shrinkFlags;
-
-
- GXV_LIMIT_CHECK( 4 + 4 + 4 + 4 + 4 + 2 + 2 );
- justClass = FT_NEXT_ULONG( p );
- beforeGrowLimit = FT_NEXT_ULONG( p );
- beforeShrinkGrowLimit = FT_NEXT_ULONG( p );
- afterGrowLimit = FT_NEXT_ULONG( p );
- afterShrinkGrowLimit = FT_NEXT_ULONG( p );
- growFlags = FT_NEXT_USHORT( p );
- shrinkFlags = FT_NEXT_USHORT( p );
-
- /* TODO: decode flags for human readability */
-
- valid->subtable_length = p - table;
- }
-
-
- static void
- gxv_just_wdc_entry_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- FT_ULong count, i;
-
-
- GXV_LIMIT_CHECK( 4 );
- count = FT_NEXT_ULONG( p );
- for ( i = 0; i < count; i++ )
- {
- GXV_TRACE(( "validating wdc pair %d/%d\n", i + 1, count ));
- gxv_just_wdp_entry_validate( p, limit, valid );
- p += valid->subtable_length;
- }
-
- valid->subtable_length = p - table;
- }
-
-
- static void
- gxv_just_widthDeltaClusters_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table ;
- FT_Bytes wdc_end = table + GXV_JUST_DATA( wdc_offset_max );
- FT_UInt i;
-
-
- GXV_NAME_ENTER( "just justDeltaClusters" );
-
- if ( limit <= wdc_end )
- FT_INVALID_OFFSET;
-
- for ( i = 0; p <= wdc_end; i++ )
- {
- gxv_just_wdc_entry_validate( p, limit, valid );
- p += valid->subtable_length;
- }
-
- valid->subtable_length = p - table;
-
- GXV_EXIT;
- }
-
-
- static void
- gxv_just_actSubrecord_type0_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
-
- FT_Fixed lowerLimit;
- FT_Fixed upperLimit;
-
- FT_UShort order;
- FT_UShort decomposedCount;
-
- FT_UInt i;
-
-
- GXV_LIMIT_CHECK( 4 + 4 + 2 + 2 );
- lowerLimit = FT_NEXT_ULONG( p );
- upperLimit = FT_NEXT_ULONG( p );
- order = FT_NEXT_USHORT( p );
- decomposedCount = FT_NEXT_USHORT( p );
-
- for ( i = 0; i < decomposedCount; i++ )
- {
- FT_UShort glyphs;
-
-
- GXV_LIMIT_CHECK( 2 );
- glyphs = FT_NEXT_USHORT( p );
- }
-
- valid->subtable_length = p - table;
- }
-
-
- static void
- gxv_just_actSubrecord_type1_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UShort addGlyph;
-
-
- GXV_LIMIT_CHECK( 2 );
- addGlyph = FT_NEXT_USHORT( p );
-
- valid->subtable_length = p - table;
- }
-
-
- static void
- gxv_just_actSubrecord_type2_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- FT_Fixed substThreshhold; /* Apple misspelled "Threshhold" */
- FT_UShort addGlyph;
- FT_UShort substGlyph;
-
-
- GXV_LIMIT_CHECK( 4 + 2 + 2 );
- substThreshhold = FT_NEXT_ULONG( p );
- addGlyph = FT_NEXT_USHORT( p );
- substGlyph = FT_NEXT_USHORT( p );
-
- valid->subtable_length = p - table;
- }
-
-
- static void
- gxv_just_actSubrecord_type4_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- FT_ULong variantsAxis;
- FT_Fixed minimumLimit;
- FT_Fixed noStretchValue;
- FT_Fixed maximumLimit;
-
-
- GXV_LIMIT_CHECK( 4 + 4 + 4 + 4 );
- variantsAxis = FT_NEXT_ULONG( p );
- minimumLimit = FT_NEXT_ULONG( p );
- noStretchValue = FT_NEXT_ULONG( p );
- maximumLimit = FT_NEXT_ULONG( p );
-
- valid->subtable_length = p - table;
- }
-
-
- static void
- gxv_just_actSubrecord_type5_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UShort flags;
- FT_UShort glyph;
-
-
- GXV_LIMIT_CHECK( 2 + 2 );
- flags = FT_NEXT_USHORT( p );
- glyph = FT_NEXT_USHORT( p );
-
- valid->subtable_length = p - table;
- }
-
-
- /* parse single actSubrecord */
- static void
- gxv_just_actSubrecord_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UShort actionClass;
- FT_UShort actionType;
- FT_ULong actionLength;
-
-
- GXV_NAME_ENTER( "just actSubrecord" );
-
- GXV_LIMIT_CHECK( 2 + 2 + 4 );
- actionClass = FT_NEXT_USHORT( p );
- actionType = FT_NEXT_USHORT( p );
- actionLength = FT_NEXT_ULONG( p );
-
- if ( actionType == 0 )
- gxv_just_actSubrecord_type0_validate( p, limit, valid );
- else if ( actionType == 1 )
- gxv_just_actSubrecord_type1_validate( p, limit, valid );
- else if ( actionType == 2 )
- gxv_just_actSubrecord_type2_validate( p, limit, valid );
- else if ( actionType == 3 )
- ; /* Stretch glyph action: no actionData */
- else if ( actionType == 4 )
- gxv_just_actSubrecord_type4_validate( p, limit, valid );
- else if ( actionType == 5 )
- gxv_just_actSubrecord_type5_validate( p, limit, valid );
- else
- FT_INVALID_DATA;
-
- valid->subtable_length = actionLength;
-
- GXV_EXIT;
- }
-
-
- static void
- gxv_just_pcActionRecord_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- FT_ULong actionCount;
- FT_ULong i;
-
-
- GXV_LIMIT_CHECK( 4 );
- actionCount = FT_NEXT_ULONG( p );
- GXV_TRACE(( "actionCount = %d\n", actionCount ));
-
- for ( i = 0; i < actionCount; i++ )
- {
- gxv_just_actSubrecord_validate( p, limit, valid );
- p += valid->subtable_length;
- }
-
- valid->subtable_length = p - table;
-
- GXV_EXIT;
- }
-
-
- static void
- gxv_just_pcTable_LookupValue_entry_validate( FT_UShort glyph,
- GXV_LookupValueCPtr value_p,
- GXV_Validator valid )
- {
- FT_UNUSED( glyph );
-
- if ( value_p->u > GXV_JUST_DATA( pc_offset_max ) )
- GXV_JUST_DATA( pc_offset_max ) = value_p->u;
- if ( value_p->u < GXV_JUST_DATA( pc_offset_max ) )
- GXV_JUST_DATA( pc_offset_min ) = value_p->u;
- }
-
-
- static void
- gxv_just_pcLookupTable_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
-
-
- GXV_NAME_ENTER( "just pcLookupTable" );
- GXV_JUST_DATA( pc_offset_max ) = 0x0000;
- GXV_JUST_DATA( pc_offset_min ) = 0xFFFFU;
-
- valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
- valid->lookupval_func = gxv_just_pcTable_LookupValue_entry_validate;
-
- gxv_LookupTable_validate( p, limit, valid );
-
- /* subtable_length is set by gxv_LookupTable_validate() */
-
- GXV_EXIT;
- }
-
-
- static void
- gxv_just_postcompTable_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
-
-
- GXV_NAME_ENTER( "just postcompTable" );
-
- gxv_just_pcLookupTable_validate( p, limit, valid );
- p += valid->subtable_length;
-
- gxv_just_pcActionRecord_validate( p, limit, valid );
- p += valid->subtable_length;
-
- valid->subtable_length = p - table;
-
- GXV_EXIT;
- }
-
-
- static void
- gxv_just_classTable_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 markClass;
- FT_UShort currentClass;
-
- FT_UNUSED( state );
- FT_UNUSED( glyphOffset_p );
- FT_UNUSED( table );
- FT_UNUSED( limit );
- FT_UNUSED( valid );
-
-
- setMark = (FT_UShort)( ( flags >> 15 ) & 1 );
- dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 );
- markClass = (FT_UShort)( ( flags >> 7 ) & 0x7F );
- currentClass = (FT_UShort)( flags & 0x7F );
-
- /* TODO: validate markClass & currentClass */
- }
-
-
- static void
- gxv_just_justClassTable_validate ( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
- FT_UShort length;
- FT_UShort coverage;
- FT_ULong subFeatureFlags;
-
-
- GXV_NAME_ENTER( "just justClassTable" );
-
- GXV_LIMIT_CHECK( 2 + 2 + 4 );
- length = FT_NEXT_USHORT( p );
- coverage = FT_NEXT_USHORT( p );
- subFeatureFlags = FT_NEXT_ULONG( p );
-
- GXV_TRACE(( " justClassTable: coverage = 0x%04x (%s)",
- coverage,
- ( 0x4000 & coverage ) == 0 ? "ascending" : "descending" ));
-
- valid->statetable.optdata = NULL;
- valid->statetable.optdata_load_func = NULL;
- valid->statetable.subtable_setup_func = NULL;
- valid->statetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE;
- valid->statetable.entry_validate_func =
- gxv_just_classTable_entry_validate;
-
- gxv_StateTable_validate( p, table + length, valid );
-
- /* subtable_length is set by gxv_LookupTable_validate() */
-
- GXV_EXIT;
- }
-
-
- static void
- gxv_just_wdcTable_LookupValue_validate( FT_UShort glyph,
- GXV_LookupValueCPtr value_p,
- GXV_Validator valid )
- {
- FT_UNUSED( glyph );
-
- if ( value_p->u > GXV_JUST_DATA( wdc_offset_max ) )
- GXV_JUST_DATA( wdc_offset_max ) = value_p->u;
- if ( value_p->u < GXV_JUST_DATA( wdc_offset_min ) )
- GXV_JUST_DATA( wdc_offset_min ) = value_p->u;
- }
-
-
- static void
- gxv_just_justData_lookuptable_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- FT_Bytes p = table;
-
-
- GXV_JUST_DATA( wdc_offset_max ) = 0x0000;
- GXV_JUST_DATA( wdc_offset_min ) = 0xFFFFU;
-
- valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
- valid->lookupval_func = gxv_just_wdcTable_LookupValue_validate;
-
- gxv_LookupTable_validate( p, limit, valid );
-
- /* subtable_length is set by gxv_LookupTable_validate() */
-
- GXV_EXIT;
- }
-
-
- /*
- * gxv_just_justData_validate() parses and validates horizData, vertData.
- */
- static void
- gxv_just_justData_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator valid )
- {
- /*
- * following 3 offsets are measured from the start of `just'
- * (which table points to), not justData
- */
- FT_UShort justClassTableOffset;
- FT_UShort wdcTableOffset;
- FT_UShort pcTableOffset;
- FT_Bytes p = table;
-
- GXV_ODTECT( 4, odtect );
-
-
- GXV_NAME_ENTER( "just justData" );
-
- GXV_ODTECT_INIT( odtect );
- GXV_LIMIT_CHECK( 2 + 2 + 2 );
- justClassTableOffset = FT_NEXT_USHORT( p );
- wdcTableOffset = FT_NEXT_USHORT( p );
- pcTableOffset = FT_NEXT_USHORT( p );
-
- GXV_TRACE(( " (justClassTableOffset = 0x%04x)\n", justClassTableOffset ));
- GXV_TRACE(( " (wdcTableOffset = 0x%04x)\n", wdcTableOffset ));
- GXV_TRACE(( " (pcTableOffset = 0x%04x)\n", pcTableOffset ));
-
- gxv_just_justData_lookuptable_validate( p, limit, valid );
- gxv_odtect_add_range( p, valid->subtable_length,
- "just_LookupTable", odtect );
-
- if ( wdcTableOffset )
- {
- gxv_just_widthDeltaClusters_validate(
- valid->root->base + wdcTableOffset, limit, valid );
- gxv_odtect_add_range( valid->root->base + wdcTableOffset,
- valid->subtable_length, "just_wdcTable", odtect );
- }
-
- if ( pcTableOffset )
- {
- gxv_just_postcompTable_validate( valid->root->base + pcTableOffset,
- limit, valid );
- gxv_odtect_add_range( valid->root->base + pcTableOffset,
- valid->subtable_length, "just_pcTable", odtect );
- }
-
- if ( justClassTableOffset )
- {
- gxv_just_justClassTable_validate(
- valid->root->base + justClassTableOffset, limit, valid );
- gxv_odtect_add_range( valid->root->base + justClassTableOffset,
- valid->subtable_length, "just_justClassTable",
- odtect );
- }
-
- gxv_odtect_validate( odtect, valid );
-
- GXV_EXIT;
- }
-
-
- FT_LOCAL_DEF( void )
- gxv_just_validate( FT_Bytes table,
- FT_Face face,
- FT_Validator ftvalid )
- {
- FT_Bytes p = table;
- FT_Bytes limit = 0;
- FT_Offset table_size;
-
- GXV_ValidatorRec validrec;
- GXV_Validator valid = &validrec;
- GXV_just_DataRec justrec;
- GXV_just_Data just = &justrec;
-
- FT_ULong version;
- FT_UShort format;
- FT_UShort horizOffset;
- FT_UShort vertOffset;
-
- GXV_ODTECT( 3, odtect );
-
-
- GXV_ODTECT_INIT( odtect );
-
- valid->root = ftvalid;
- valid->table_data = just;
- valid->face = face;
-
- FT_TRACE3(( "validating `just' table\n" ));
- GXV_INIT;
-
- limit = valid->root->limit;
- table_size = limit - table;
-
- GXV_LIMIT_CHECK( 4 + 2 + 2 + 2 );
- version = FT_NEXT_ULONG( p );
- format = FT_NEXT_USHORT( p );
- horizOffset = FT_NEXT_USHORT( p );
- vertOffset = FT_NEXT_USHORT( p );
- gxv_odtect_add_range( table, p - table, "just header", odtect );
-
-
- /* Version 1.0 (always:2000) */
- GXV_TRACE(( " (version = 0x%08x)\n", version ));
- if ( version != 0x00010000UL )
- FT_INVALID_FORMAT;
-
- /* format 0 (always:2000) */
- GXV_TRACE(( " (format = 0x%04x)\n", format ));
- if ( format != 0x0000 )
- FT_INVALID_FORMAT;
-
- GXV_TRACE(( " (horizOffset = %d)\n", horizOffset ));
- GXV_TRACE(( " (vertOffset = %d)\n", vertOffset ));
-
-
- /* validate justData */
- if ( 0 < horizOffset )
- {
- gxv_just_justData_validate( table + horizOffset, limit, valid );
- gxv_odtect_add_range( table + horizOffset, valid->subtable_length,
- "horizJustData", odtect );
- }
-
- if ( 0 < vertOffset )
- {
- gxv_just_justData_validate( table + vertOffset, limit, valid );
- gxv_odtect_add_range( table + vertOffset, valid->subtable_length,
- "vertJustData", odtect );
- }
-
- gxv_odtect_validate( odtect, valid );
-
- FT_TRACE4(( "\n" ));
- }
-
-
-/* END */