--- a/misc/libfreetype/src/gxvalid/gxvprop.c Tue Jul 16 11:14:27 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,301 +0,0 @@
-/***************************************************************************/
-/* */
-/* gxvprop.c */
-/* */
-/* TrueTypeGX/AAT prop table validation (body). */
-/* */
-/* Copyright 2004, 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"
-
-
- /*************************************************************************/
- /* */
- /* 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_gxvprop
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** Data and Types *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
-#define GXV_PROP_HEADER_SIZE ( 4 + 2 + 2 )
-#define GXV_PROP_SIZE_MIN GXV_PROP_HEADER_SIZE
-
- typedef struct GXV_prop_DataRec_
- {
- FT_Fixed version;
-
- } GXV_prop_DataRec, *GXV_prop_Data;
-
-#define GXV_PROP_DATA( field ) GXV_TABLE_DATA( prop, field )
-
-#define GXV_PROP_FLOATER 0x8000U
-#define GXV_PROP_USE_COMPLEMENTARY_BRACKET 0x1000U
-#define GXV_PROP_COMPLEMENTARY_BRACKET_OFFSET 0x0F00U
-#define GXV_PROP_ATTACHING_TO_RIGHT 0x0080U
-#define GXV_PROP_RESERVED 0x0060U
-#define GXV_PROP_DIRECTIONALITY_CLASS 0x001FU
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** UTILITY FUNCTIONS *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static void
- gxv_prop_zero_advance_validate( FT_UShort gid,
- GXV_Validator valid )
- {
- FT_Face face;
- FT_Error error;
- FT_GlyphSlot glyph;
-
-
- GXV_NAME_ENTER( "zero advance" );
-
- face = valid->face;
-
- error = FT_Load_Glyph( face,
- gid,
- FT_LOAD_IGNORE_TRANSFORM );
- if ( error )
- FT_INVALID_GLYPH_ID;
-
- glyph = face->glyph;
-
- if ( glyph->advance.x != (FT_Pos)0 ||
- glyph->advance.y != (FT_Pos)0 )
- FT_INVALID_DATA;
-
- GXV_EXIT;
- }
-
-
- /* Pass 0 as GLYPH to check the default property */
- static void
- gxv_prop_property_validate( FT_UShort property,
- FT_UShort glyph,
- GXV_Validator valid )
- {
- if ( glyph != 0 && ( property & GXV_PROP_FLOATER ) )
- gxv_prop_zero_advance_validate( glyph, valid );
-
- if ( property & GXV_PROP_USE_COMPLEMENTARY_BRACKET )
- {
- FT_UShort offset;
- char complement;
-
-
- offset = (FT_UShort)( property & GXV_PROP_COMPLEMENTARY_BRACKET_OFFSET );
- if ( offset == 0 )
- FT_INVALID_DATA;
-
- complement = (char)( offset >> 8 );
- if ( complement & 0x08 )
- {
- /* Top bit is set: negative */
-
- /* Calculate the absolute offset */
- complement = (char)( ( complement & 0x07 ) + 1 );
-
- /* The gid for complement must be greater than 0 */
- if ( glyph <= complement )
- FT_INVALID_DATA;
- }
- else
- {
- /* The gid for complement must be the face. */
- gxv_glyphid_validate( (FT_UShort)( glyph + complement ), valid );
- }
- }
- else
- {
- if ( property & GXV_PROP_COMPLEMENTARY_BRACKET_OFFSET )
- GXV_TRACE(( "glyph %d cannot have complementary bracketing\n",
- glyph ));
- }
-
- /* this is introduced in version 2.0 */
- if ( property & GXV_PROP_ATTACHING_TO_RIGHT )
- {
- if ( GXV_PROP_DATA( version ) == 0x00010000UL )
- FT_INVALID_DATA;
- }
-
- if ( property & GXV_PROP_RESERVED )
- FT_INVALID_DATA;
-
- if ( ( property & GXV_PROP_DIRECTIONALITY_CLASS ) > 11 )
- {
- /* TODO: Too restricted. Use the validation level. */
- if ( GXV_PROP_DATA( version ) == 0x00010000UL ||
- GXV_PROP_DATA( version ) == 0x00020000UL )
- FT_INVALID_DATA;
- }
- }
-
-
- static void
- gxv_prop_LookupValue_validate( FT_UShort glyph,
- GXV_LookupValueCPtr value_p,
- GXV_Validator valid )
- {
- gxv_prop_property_validate( value_p->u, glyph, valid );
- }
-
-
- /*
- +===============+ --------+
- | lookup header | |
- +===============+ |
- | BinSrchHeader | |
- +===============+ |
- | lastGlyph[0] | |
- +---------------+ |
- | firstGlyph[0] | | head of lookup table
- +---------------+ | +
- | offset[0] | -> | offset [byte]
- +===============+ | +
- | lastGlyph[1] | | (glyphID - firstGlyph) * 2 [byte]
- +---------------+ |
- | firstGlyph[1] | |
- +---------------+ |
- | offset[1] | |
- +===============+ |
- |
- ... |
- |
- 16bit value array |
- +===============+ |
- | value | <-------+
- ...
- */
-
- static GXV_LookupValueDesc
- gxv_prop_LookupFmt4_transit( FT_UShort relative_gindex,
- GXV_LookupValueCPtr base_value_p,
- FT_Bytes lookuptbl_limit,
- GXV_Validator valid )
- {
- FT_Bytes p;
- FT_Bytes limit;
- FT_UShort offset;
- GXV_LookupValueDesc value;
-
- /* XXX: check range? */
- offset = (FT_UShort)( base_value_p->u +
- relative_gindex * sizeof( FT_UShort ) );
- p = valid->lookuptbl_head + offset;
- limit = lookuptbl_limit;
-
- GXV_LIMIT_CHECK ( 2 );
- value.u = FT_NEXT_USHORT( p );
-
- return value;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** prop TABLE *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- FT_LOCAL_DEF( void )
- gxv_prop_validate( FT_Bytes table,
- FT_Face face,
- FT_Validator ftvalid )
- {
- FT_Bytes p = table;
- FT_Bytes limit = 0;
- GXV_ValidatorRec validrec;
- GXV_Validator valid = &validrec;
-
- GXV_prop_DataRec proprec;
- GXV_prop_Data prop = &proprec;
-
- FT_Fixed version;
- FT_UShort format;
- FT_UShort defaultProp;
-
-
- valid->root = ftvalid;
- valid->table_data = prop;
- valid->face = face;
-
- FT_TRACE3(( "validating `prop' table\n" ));
- GXV_INIT;
-
- GXV_LIMIT_CHECK( 4 + 2 + 2 );
- version = FT_NEXT_ULONG( p );
- format = FT_NEXT_USHORT( p );
- defaultProp = FT_NEXT_USHORT( p );
-
- /* only versions 1.0, 2.0, 3.0 are defined (1996) */
- if ( version != 0x00010000UL &&
- version != 0x00020000UL &&
- version != 0x00030000UL )
- FT_INVALID_FORMAT;
-
-
- /* only formats 0x0000, 0x0001 are defined (1996) */
- if ( format > 1 )
- FT_INVALID_FORMAT;
-
- gxv_prop_property_validate( defaultProp, 0, valid );
-
- if ( format == 0 )
- {
- FT_TRACE3(( "(format 0, no per-glyph properties, "
- "remaining %d bytes are skipped)", limit - p ));
- goto Exit;
- }
-
- /* format == 1 */
- GXV_PROP_DATA( version ) = version;
-
- valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
- valid->lookupval_func = gxv_prop_LookupValue_validate;
- valid->lookupfmt4_trans = gxv_prop_LookupFmt4_transit;
-
- gxv_LookupTable_validate( p, limit, valid );
-
- Exit:
- FT_TRACE4(( "\n" ));
- }
-
-
-/* END */