diff -r 92af50454cf2 -r 8054d9d775fd misc/libfreetype/src/gxvalid/gxvbsln.c --- a/misc/libfreetype/src/gxvalid/gxvbsln.c Fri Oct 11 11:55:31 2013 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,333 +0,0 @@ -/***************************************************************************/ -/* */ -/* gxvbsln.c */ -/* */ -/* TrueTypeGX/AAT bsln 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_gxvbsln - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** Data and Types *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - -#define GXV_BSLN_VALUE_COUNT 32 -#define GXV_BSLN_VALUE_EMPTY 0xFFFFU - - - typedef struct GXV_bsln_DataRec_ - { - FT_Bytes ctlPoints_p; - FT_UShort defaultBaseline; - - } GXV_bsln_DataRec, *GXV_bsln_Data; - - -#define GXV_BSLN_DATA( field ) GXV_TABLE_DATA( bsln, field ) - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** UTILITY FUNCTIONS *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - static void - gxv_bsln_LookupValue_validate( FT_UShort glyph, - GXV_LookupValueCPtr value_p, - GXV_Validator valid ) - { - FT_UShort v = value_p->u; - FT_UShort* ctlPoints; - - FT_UNUSED( glyph ); - - - GXV_NAME_ENTER( "lookup value" ); - - if ( v >= GXV_BSLN_VALUE_COUNT ) - FT_INVALID_DATA; - - ctlPoints = (FT_UShort*)GXV_BSLN_DATA( ctlPoints_p ); - if ( ctlPoints && ctlPoints[v] == GXV_BSLN_VALUE_EMPTY ) - FT_INVALID_DATA; - - GXV_EXIT; - } - - - /* - +===============+ --------+ - | 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_bsln_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; - } - - - static void - gxv_bsln_parts_fmt0_validate( FT_Bytes tables, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = tables; - - - GXV_NAME_ENTER( "parts format 0" ); - - /* deltas */ - GXV_LIMIT_CHECK( 2 * GXV_BSLN_VALUE_COUNT ); - - valid->table_data = NULL; /* No ctlPoints here. */ - - GXV_EXIT; - } - - - static void - gxv_bsln_parts_fmt1_validate( FT_Bytes tables, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = tables; - - - GXV_NAME_ENTER( "parts format 1" ); - - /* deltas */ - gxv_bsln_parts_fmt0_validate( p, limit, valid ); - - /* mappingData */ - valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED; - valid->lookupval_func = gxv_bsln_LookupValue_validate; - valid->lookupfmt4_trans = gxv_bsln_LookupFmt4_transit; - gxv_LookupTable_validate( p + 2 * GXV_BSLN_VALUE_COUNT, - limit, - valid ); - - GXV_EXIT; - } - - - static void - gxv_bsln_parts_fmt2_validate( FT_Bytes tables, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = tables; - - FT_UShort stdGlyph; - FT_UShort ctlPoint; - FT_Int i; - - FT_UShort defaultBaseline = GXV_BSLN_DATA( defaultBaseline ); - - - GXV_NAME_ENTER( "parts format 2" ); - - GXV_LIMIT_CHECK( 2 + ( 2 * GXV_BSLN_VALUE_COUNT ) ); - - /* stdGlyph */ - stdGlyph = FT_NEXT_USHORT( p ); - GXV_TRACE(( " (stdGlyph = %u)\n", stdGlyph )); - - gxv_glyphid_validate( stdGlyph, valid ); - - /* Record the position of ctlPoints */ - GXV_BSLN_DATA( ctlPoints_p ) = p; - - /* ctlPoints */ - for ( i = 0; i < GXV_BSLN_VALUE_COUNT; i++ ) - { - ctlPoint = FT_NEXT_USHORT( p ); - if ( ctlPoint == GXV_BSLN_VALUE_EMPTY ) - { - if ( i == defaultBaseline ) - FT_INVALID_DATA; - } - else - gxv_ctlPoint_validate( stdGlyph, (FT_Short)ctlPoint, valid ); - } - - GXV_EXIT; - } - - - static void - gxv_bsln_parts_fmt3_validate( FT_Bytes tables, - FT_Bytes limit, - GXV_Validator valid) - { - FT_Bytes p = tables; - - - GXV_NAME_ENTER( "parts format 3" ); - - /* stdGlyph + ctlPoints */ - gxv_bsln_parts_fmt2_validate( p, limit, valid ); - - /* mappingData */ - valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED; - valid->lookupval_func = gxv_bsln_LookupValue_validate; - valid->lookupfmt4_trans = gxv_bsln_LookupFmt4_transit; - gxv_LookupTable_validate( p + ( 2 + 2 * GXV_BSLN_VALUE_COUNT ), - limit, - valid ); - - GXV_EXIT; - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** bsln TABLE *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - FT_LOCAL_DEF( void ) - gxv_bsln_validate( FT_Bytes table, - FT_Face face, - FT_Validator ftvalid ) - { - GXV_ValidatorRec validrec; - GXV_Validator valid = &validrec; - - GXV_bsln_DataRec bslnrec; - GXV_bsln_Data bsln = &bslnrec; - - FT_Bytes p = table; - FT_Bytes limit = 0; - - FT_ULong version; - FT_UShort format; - FT_UShort defaultBaseline; - - GXV_Validate_Func fmt_funcs_table [] = - { - gxv_bsln_parts_fmt0_validate, - gxv_bsln_parts_fmt1_validate, - gxv_bsln_parts_fmt2_validate, - gxv_bsln_parts_fmt3_validate, - }; - - - valid->root = ftvalid; - valid->table_data = bsln; - valid->face = face; - - FT_TRACE3(( "validating `bsln' table\n" )); - GXV_INIT; - - - GXV_LIMIT_CHECK( 4 + 2 + 2 ); - version = FT_NEXT_ULONG( p ); - format = FT_NEXT_USHORT( p ); - defaultBaseline = FT_NEXT_USHORT( p ); - - /* only version 1.0 is defined (1996) */ - if ( version != 0x00010000UL ) - FT_INVALID_FORMAT; - - /* only format 1, 2, 3 are defined (1996) */ - GXV_TRACE(( " (format = %d)\n", format )); - if ( format > 3 ) - FT_INVALID_FORMAT; - - if ( defaultBaseline > 31 ) - FT_INVALID_FORMAT; - - bsln->defaultBaseline = defaultBaseline; - - fmt_funcs_table[format]( p, limit, valid ); - - FT_TRACE4(( "\n" )); - } - - -/* arch-tag: ebe81143-fdaa-4c68-a4d1-b57227daa3bc - (do not change this comment) */ - - -/* END */