diff -r f3840de881bd -r 915436ff64ab misc/libfreetype/src/gxvalid/gxvprop.c --- a/misc/libfreetype/src/gxvalid/gxvprop.c Thu Jul 25 23:16:06 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 */