diff -r a501f5ec7b34 -r 0f5961910e27 misc/libfreetype/src/gxvalid/gxvcommn.c --- a/misc/libfreetype/src/gxvalid/gxvcommn.c Tue Jul 16 11:14:27 2013 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1759 +0,0 @@ -/***************************************************************************/ -/* */ -/* gxvcommn.c */ -/* */ -/* TrueTypeGX/AAT common tables validation (body). */ -/* */ -/* Copyright 2004, 2005, 2009, 2010 */ -/* 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 "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_gxvcommon - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** 16bit offset sorter *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - static int - gxv_compare_ushort_offset( FT_UShort* a, - FT_UShort* b ) - { - if ( *a < *b ) - return -1; - else if ( *a > *b ) - return 1; - else - return 0; - } - - - FT_LOCAL_DEF( void ) - gxv_set_length_by_ushort_offset( FT_UShort* offset, - FT_UShort** length, - FT_UShort* buff, - FT_UInt nmemb, - FT_UShort limit, - GXV_Validator valid ) - { - FT_UInt i; - - - for ( i = 0; i < nmemb; i++ ) - *(length[i]) = 0; - - for ( i = 0; i < nmemb; i++ ) - buff[i] = offset[i]; - buff[nmemb] = limit; - - ft_qsort( buff, ( nmemb + 1 ), sizeof ( FT_UShort ), - ( int(*)(const void*, const void*) )gxv_compare_ushort_offset ); - - if ( buff[nmemb] > limit ) - FT_INVALID_OFFSET; - - for ( i = 0; i < nmemb; i++ ) - { - FT_UInt j; - - - for ( j = 0; j < nmemb; j++ ) - if ( buff[j] == offset[i] ) - break; - - if ( j == nmemb ) - FT_INVALID_OFFSET; - - *(length[i]) = (FT_UShort)( buff[j + 1] - buff[j] ); - - if ( 0 != offset[i] && 0 == *(length[i]) ) - FT_INVALID_OFFSET; - } - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** 32bit offset sorter *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - static int - gxv_compare_ulong_offset( FT_ULong* a, - FT_ULong* b ) - { - if ( *a < *b ) - return -1; - else if ( *a > *b ) - return 1; - else - return 0; - } - - - FT_LOCAL_DEF( void ) - gxv_set_length_by_ulong_offset( FT_ULong* offset, - FT_ULong** length, - FT_ULong* buff, - FT_UInt nmemb, - FT_ULong limit, - GXV_Validator valid) - { - FT_UInt i; - - - for ( i = 0; i < nmemb; i++ ) - *(length[i]) = 0; - - for ( i = 0; i < nmemb; i++ ) - buff[i] = offset[i]; - buff[nmemb] = limit; - - ft_qsort( buff, ( nmemb + 1 ), sizeof ( FT_ULong ), - ( int(*)(const void*, const void*) )gxv_compare_ulong_offset ); - - if ( buff[nmemb] > limit ) - FT_INVALID_OFFSET; - - for ( i = 0; i < nmemb; i++ ) - { - FT_UInt j; - - - for ( j = 0; j < nmemb; j++ ) - if ( buff[j] == offset[i] ) - break; - - if ( j == nmemb ) - FT_INVALID_OFFSET; - - *(length[i]) = buff[j + 1] - buff[j]; - - if ( 0 != offset[i] && 0 == *(length[i]) ) - FT_INVALID_OFFSET; - } - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** scan value array and get min & max *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - - FT_LOCAL_DEF( void ) - gxv_array_getlimits_byte( FT_Bytes table, - FT_Bytes limit, - FT_Byte* min, - FT_Byte* max, - GXV_Validator valid ) - { - FT_Bytes p = table; - - - *min = 0xFF; - *max = 0x00; - - while ( p < limit ) - { - FT_Byte val; - - - GXV_LIMIT_CHECK( 1 ); - val = FT_NEXT_BYTE( p ); - - *min = (FT_Byte)FT_MIN( *min, val ); - *max = (FT_Byte)FT_MAX( *max, val ); - } - - valid->subtable_length = p - table; - } - - - FT_LOCAL_DEF( void ) - gxv_array_getlimits_ushort( FT_Bytes table, - FT_Bytes limit, - FT_UShort* min, - FT_UShort* max, - GXV_Validator valid ) - { - FT_Bytes p = table; - - - *min = 0xFFFFU; - *max = 0x0000; - - while ( p < limit ) - { - FT_UShort val; - - - GXV_LIMIT_CHECK( 2 ); - val = FT_NEXT_USHORT( p ); - - *min = (FT_Byte)FT_MIN( *min, val ); - *max = (FT_Byte)FT_MAX( *max, val ); - } - - valid->subtable_length = p - table; - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** BINSEARCHHEADER *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - typedef struct GXV_BinSrchHeader_ - { - FT_UShort unitSize; - FT_UShort nUnits; - FT_UShort searchRange; - FT_UShort entrySelector; - FT_UShort rangeShift; - - } GXV_BinSrchHeader; - - - static void - gxv_BinSrchHeader_check_consistency( GXV_BinSrchHeader* binSrchHeader, - GXV_Validator valid ) - { - FT_UShort searchRange; - FT_UShort entrySelector; - FT_UShort rangeShift; - - - if ( binSrchHeader->unitSize == 0 ) - FT_INVALID_DATA; - - if ( binSrchHeader->nUnits == 0 ) - { - if ( binSrchHeader->searchRange == 0 && - binSrchHeader->entrySelector == 0 && - binSrchHeader->rangeShift == 0 ) - return; - else - FT_INVALID_DATA; - } - - for ( searchRange = 1, entrySelector = 1; - ( searchRange * 2 ) <= binSrchHeader->nUnits && - searchRange < 0x8000U; - searchRange *= 2, entrySelector++ ) - ; - - entrySelector--; - searchRange = (FT_UShort)( searchRange * binSrchHeader->unitSize ); - rangeShift = (FT_UShort)( binSrchHeader->nUnits * binSrchHeader->unitSize - - searchRange ); - - if ( searchRange != binSrchHeader->searchRange || - entrySelector != binSrchHeader->entrySelector || - rangeShift != binSrchHeader->rangeShift ) - { - GXV_TRACE(( "Inconsistency found in BinSrchHeader\n" )); - GXV_TRACE(( "originally: unitSize=%d, nUnits=%d, " - "searchRange=%d, entrySelector=%d, " - "rangeShift=%d\n", - binSrchHeader->unitSize, binSrchHeader->nUnits, - binSrchHeader->searchRange, binSrchHeader->entrySelector, - binSrchHeader->rangeShift )); - GXV_TRACE(( "calculated: unitSize=%d, nUnits=%d, " - "searchRange=%d, entrySelector=%d, " - "rangeShift=%d\n", - binSrchHeader->unitSize, binSrchHeader->nUnits, - searchRange, entrySelector, rangeShift )); - - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_DATA; - } - } - - - /* - * parser & validator of BinSrchHeader - * which is used in LookupTable format 2, 4, 6. - * - * Essential parameters (unitSize, nUnits) are returned by - * given pointer, others (searchRange, entrySelector, rangeShift) - * can be calculated by essential parameters, so they are just - * validated and discarded. - * - * However, wrong values in searchRange, entrySelector, rangeShift - * won't cause fatal errors, because these parameters might be - * only used in old m68k font driver in MacOS. - * -- suzuki toshiya - */ - - FT_LOCAL_DEF( void ) - gxv_BinSrchHeader_validate( FT_Bytes table, - FT_Bytes limit, - FT_UShort* unitSize_p, - FT_UShort* nUnits_p, - GXV_Validator valid ) - { - FT_Bytes p = table; - GXV_BinSrchHeader binSrchHeader; - - - GXV_NAME_ENTER( "BinSrchHeader validate" ); - - if ( *unitSize_p == 0 ) - { - GXV_LIMIT_CHECK( 2 ); - binSrchHeader.unitSize = FT_NEXT_USHORT( p ); - } - else - binSrchHeader.unitSize = *unitSize_p; - - if ( *nUnits_p == 0 ) - { - GXV_LIMIT_CHECK( 2 ); - binSrchHeader.nUnits = FT_NEXT_USHORT( p ); - } - else - binSrchHeader.nUnits = *nUnits_p; - - GXV_LIMIT_CHECK( 2 + 2 + 2 ); - binSrchHeader.searchRange = FT_NEXT_USHORT( p ); - binSrchHeader.entrySelector = FT_NEXT_USHORT( p ); - binSrchHeader.rangeShift = FT_NEXT_USHORT( p ); - GXV_TRACE(( "nUnits %d\n", binSrchHeader.nUnits )); - - gxv_BinSrchHeader_check_consistency( &binSrchHeader, valid ); - - if ( *unitSize_p == 0 ) - *unitSize_p = binSrchHeader.unitSize; - - if ( *nUnits_p == 0 ) - *nUnits_p = binSrchHeader.nUnits; - - valid->subtable_length = p - table; - GXV_EXIT; - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** LOOKUP TABLE *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - -#define GXV_LOOKUP_VALUE_LOAD( P, SIGNSPEC ) \ - ( P += 2, gxv_lookup_value_load( P - 2, SIGNSPEC ) ) - - static GXV_LookupValueDesc - gxv_lookup_value_load( FT_Bytes p, - int signspec ) - { - GXV_LookupValueDesc v; - - - if ( signspec == GXV_LOOKUPVALUE_UNSIGNED ) - v.u = FT_NEXT_USHORT( p ); - else - v.s = FT_NEXT_SHORT( p ); - - return v; - } - - -#define GXV_UNITSIZE_VALIDATE( FORMAT, UNITSIZE, NUNITS, CORRECTSIZE ) \ - FT_BEGIN_STMNT \ - if ( UNITSIZE != CORRECTSIZE ) \ - { \ - FT_ERROR(( "unitSize=%d differs from" \ - " expected unitSize=%d" \ - " in LookupTable %s\n", \ - UNITSIZE, CORRECTSIZE, FORMAT )); \ - if ( UNITSIZE != 0 && NUNITS != 0 ) \ - { \ - FT_ERROR(( " cannot validate anymore\n" )); \ - FT_INVALID_FORMAT; \ - } \ - else \ - FT_ERROR(( " forcibly continues\n" )); \ - } \ - FT_END_STMNT - - - /* ================= Simple Array Format 0 Lookup Table ================ */ - static void - gxv_LookupTable_fmt0_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_UShort i; - - GXV_LookupValueDesc value; - - - GXV_NAME_ENTER( "LookupTable format 0" ); - - GXV_LIMIT_CHECK( 2 * valid->face->num_glyphs ); - - for ( i = 0; i < valid->face->num_glyphs; i++ ) - { - GXV_LIMIT_CHECK( 2 ); - if ( p + 2 >= limit ) /* some fonts have too-short fmt0 array */ - { - GXV_TRACE(( "too short, glyphs %d - %d are missing\n", - i, valid->face->num_glyphs )); - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_GLYPH_ID; - break; - } - - value = GXV_LOOKUP_VALUE_LOAD( p, valid->lookupval_sign ); - valid->lookupval_func( i, &value, valid ); - } - - valid->subtable_length = p - table; - GXV_EXIT; - } - - - /* ================= Segment Single Format 2 Loolup Table ============== */ - /* - * Apple spec says: - * - * To guarantee that a binary search terminates, you must include one or - * more special `end of search table' values at the end of the data to - * be searched. The number of termination values that need to be - * included is table-specific. The value that indicates binary search - * termination is 0xFFFF. - * - * The problem is that nUnits does not include this end-marker. It's - * quite difficult to discriminate whether the following 0xFFFF comes from - * the end-marker or some next data. - * - * -- suzuki toshiya - */ - static void - gxv_LookupTable_fmt2_skip_endmarkers( FT_Bytes table, - FT_UShort unitSize, - GXV_Validator valid ) - { - FT_Bytes p = table; - - - while ( ( p + 4 ) < valid->root->limit ) - { - if ( p[0] != 0xFF || p[1] != 0xFF || /* lastGlyph */ - p[2] != 0xFF || p[3] != 0xFF ) /* firstGlyph */ - break; - p += unitSize; - } - - valid->subtable_length = p - table; - } - - - static void - gxv_LookupTable_fmt2_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_UShort gid; - - FT_UShort unitSize; - FT_UShort nUnits; - FT_UShort unit; - FT_UShort lastGlyph; - FT_UShort firstGlyph; - GXV_LookupValueDesc value; - - - GXV_NAME_ENTER( "LookupTable format 2" ); - - unitSize = nUnits = 0; - gxv_BinSrchHeader_validate( p, limit, &unitSize, &nUnits, valid ); - p += valid->subtable_length; - - GXV_UNITSIZE_VALIDATE( "format2", unitSize, nUnits, 6 ); - - for ( unit = 0, gid = 0; unit < nUnits; unit++ ) - { - GXV_LIMIT_CHECK( 2 + 2 + 2 ); - lastGlyph = FT_NEXT_USHORT( p ); - firstGlyph = FT_NEXT_USHORT( p ); - value = GXV_LOOKUP_VALUE_LOAD( p, valid->lookupval_sign ); - - gxv_glyphid_validate( firstGlyph, valid ); - gxv_glyphid_validate( lastGlyph, valid ); - - if ( lastGlyph < gid ) - { - GXV_TRACE(( "reverse ordered segment specification:" - " lastGlyph[%d]=%d < lastGlyph[%d]=%d\n", - unit, lastGlyph, unit - 1 , gid )); - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_GLYPH_ID; - } - - if ( lastGlyph < firstGlyph ) - { - GXV_TRACE(( "reverse ordered range specification at unit %d:", - " lastGlyph %d < firstGlyph %d ", - unit, lastGlyph, firstGlyph )); - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_GLYPH_ID; - - if ( valid->root->level == FT_VALIDATE_TIGHT ) - continue; /* ftxvalidator silently skips such an entry */ - - FT_TRACE4(( "continuing with exchanged values\n" )); - gid = firstGlyph; - firstGlyph = lastGlyph; - lastGlyph = gid; - } - - for ( gid = firstGlyph; gid <= lastGlyph; gid++ ) - valid->lookupval_func( gid, &value, valid ); - } - - gxv_LookupTable_fmt2_skip_endmarkers( p, unitSize, valid ); - p += valid->subtable_length; - - valid->subtable_length = p - table; - GXV_EXIT; - } - - - /* ================= Segment Array Format 4 Lookup Table =============== */ - static void - gxv_LookupTable_fmt4_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_UShort unit; - FT_UShort gid; - - FT_UShort unitSize; - FT_UShort nUnits; - FT_UShort lastGlyph; - FT_UShort firstGlyph; - GXV_LookupValueDesc base_value; - GXV_LookupValueDesc value; - - - GXV_NAME_ENTER( "LookupTable format 4" ); - - unitSize = nUnits = 0; - gxv_BinSrchHeader_validate( p, limit, &unitSize, &nUnits, valid ); - p += valid->subtable_length; - - GXV_UNITSIZE_VALIDATE( "format4", unitSize, nUnits, 6 ); - - for ( unit = 0, gid = 0; unit < nUnits; unit++ ) - { - GXV_LIMIT_CHECK( 2 + 2 ); - lastGlyph = FT_NEXT_USHORT( p ); - firstGlyph = FT_NEXT_USHORT( p ); - - gxv_glyphid_validate( firstGlyph, valid ); - gxv_glyphid_validate( lastGlyph, valid ); - - if ( lastGlyph < gid ) - { - GXV_TRACE(( "reverse ordered segment specification:" - " lastGlyph[%d]=%d < lastGlyph[%d]=%d\n", - unit, lastGlyph, unit - 1 , gid )); - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_GLYPH_ID; - } - - if ( lastGlyph < firstGlyph ) - { - GXV_TRACE(( "reverse ordered range specification at unit %d:", - " lastGlyph %d < firstGlyph %d ", - unit, lastGlyph, firstGlyph )); - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_GLYPH_ID; - - if ( valid->root->level == FT_VALIDATE_TIGHT ) - continue; /* ftxvalidator silently skips such an entry */ - - FT_TRACE4(( "continuing with exchanged values\n" )); - gid = firstGlyph; - firstGlyph = lastGlyph; - lastGlyph = gid; - } - - GXV_LIMIT_CHECK( 2 ); - base_value = GXV_LOOKUP_VALUE_LOAD( p, GXV_LOOKUPVALUE_UNSIGNED ); - - for ( gid = firstGlyph; gid <= lastGlyph; gid++ ) - { - value = valid->lookupfmt4_trans( (FT_UShort)( gid - firstGlyph ), - &base_value, - limit, - valid ); - - valid->lookupval_func( gid, &value, valid ); - } - } - - gxv_LookupTable_fmt2_skip_endmarkers( p, unitSize, valid ); - p += valid->subtable_length; - - valid->subtable_length = p - table; - GXV_EXIT; - } - - - /* ================= Segment Table Format 6 Lookup Table =============== */ - static void - gxv_LookupTable_fmt6_skip_endmarkers( FT_Bytes table, - FT_UShort unitSize, - GXV_Validator valid ) - { - FT_Bytes p = table; - - - while ( p < valid->root->limit ) - { - if ( p[0] != 0xFF || p[1] != 0xFF ) - break; - p += unitSize; - } - - valid->subtable_length = p - table; - } - - - static void - gxv_LookupTable_fmt6_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_UShort unit; - FT_UShort prev_glyph; - - FT_UShort unitSize; - FT_UShort nUnits; - FT_UShort glyph; - GXV_LookupValueDesc value; - - - GXV_NAME_ENTER( "LookupTable format 6" ); - - unitSize = nUnits = 0; - gxv_BinSrchHeader_validate( p, limit, &unitSize, &nUnits, valid ); - p += valid->subtable_length; - - GXV_UNITSIZE_VALIDATE( "format6", unitSize, nUnits, 4 ); - - for ( unit = 0, prev_glyph = 0; unit < nUnits; unit++ ) - { - GXV_LIMIT_CHECK( 2 + 2 ); - glyph = FT_NEXT_USHORT( p ); - value = GXV_LOOKUP_VALUE_LOAD( p, valid->lookupval_sign ); - - if ( gxv_glyphid_validate( glyph, valid ) ) - GXV_TRACE(( " endmarker found within defined range" - " (entry %d < nUnits=%d)\n", - unit, nUnits )); - - if ( prev_glyph > glyph ) - { - GXV_TRACE(( "current gid 0x%04x < previous gid 0x%04x\n", - glyph, prev_glyph )); - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_GLYPH_ID; - } - prev_glyph = glyph; - - valid->lookupval_func( glyph, &value, valid ); - } - - gxv_LookupTable_fmt6_skip_endmarkers( p, unitSize, valid ); - p += valid->subtable_length; - - valid->subtable_length = p - table; - GXV_EXIT; - } - - - /* ================= Trimmed Array Format 8 Lookup Table =============== */ - static void - gxv_LookupTable_fmt8_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_UShort i; - - GXV_LookupValueDesc value; - FT_UShort firstGlyph; - FT_UShort glyphCount; - - - GXV_NAME_ENTER( "LookupTable format 8" ); - - /* firstGlyph + glyphCount */ - GXV_LIMIT_CHECK( 2 + 2 ); - firstGlyph = FT_NEXT_USHORT( p ); - glyphCount = FT_NEXT_USHORT( p ); - - gxv_glyphid_validate( firstGlyph, valid ); - gxv_glyphid_validate( (FT_UShort)( firstGlyph + glyphCount ), valid ); - - /* valueArray */ - for ( i = 0; i < glyphCount; i++ ) - { - GXV_LIMIT_CHECK( 2 ); - value = GXV_LOOKUP_VALUE_LOAD( p, valid->lookupval_sign ); - valid->lookupval_func( (FT_UShort)( firstGlyph + i ), &value, valid ); - } - - valid->subtable_length = p - table; - GXV_EXIT; - } - - - FT_LOCAL_DEF( void ) - gxv_LookupTable_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_UShort format; - - GXV_Validate_Func fmt_funcs_table[] = - { - gxv_LookupTable_fmt0_validate, /* 0 */ - NULL, /* 1 */ - gxv_LookupTable_fmt2_validate, /* 2 */ - NULL, /* 3 */ - gxv_LookupTable_fmt4_validate, /* 4 */ - NULL, /* 5 */ - gxv_LookupTable_fmt6_validate, /* 6 */ - NULL, /* 7 */ - gxv_LookupTable_fmt8_validate, /* 8 */ - }; - - GXV_Validate_Func func; - - - GXV_NAME_ENTER( "LookupTable" ); - - /* lookuptbl_head may be used in fmt4 transit function. */ - valid->lookuptbl_head = table; - - /* format */ - GXV_LIMIT_CHECK( 2 ); - format = FT_NEXT_USHORT( p ); - GXV_TRACE(( " (format %d)\n", format )); - - if ( format > 8 ) - FT_INVALID_FORMAT; - - func = fmt_funcs_table[format]; - if ( func == NULL ) - FT_INVALID_FORMAT; - - func( p, limit, valid ); - p += valid->subtable_length; - - valid->subtable_length = p - table; - - GXV_EXIT; - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** Glyph ID *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - FT_LOCAL_DEF( FT_Int ) - gxv_glyphid_validate( FT_UShort gid, - GXV_Validator valid ) - { - FT_Face face; - - - if ( gid == 0xFFFFU ) - { - GXV_EXIT; - return 1; - } - - face = valid->face; - if ( face->num_glyphs < gid ) - { - GXV_TRACE(( " gxv_glyphid_check() gid overflow: num_glyphs %d < %d\n", - face->num_glyphs, gid )); - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_GLYPH_ID; - } - - return 0; - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** CONTROL POINT *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - FT_LOCAL_DEF( void ) - gxv_ctlPoint_validate( FT_UShort gid, - FT_Short ctl_point, - GXV_Validator valid ) - { - FT_Face face; - FT_Error error; - - FT_GlyphSlot glyph; - FT_Outline outline; - short n_points; - - - face = valid->face; - - error = FT_Load_Glyph( face, - gid, - FT_LOAD_NO_BITMAP | FT_LOAD_IGNORE_TRANSFORM ); - if ( error ) - FT_INVALID_GLYPH_ID; - - glyph = face->glyph; - outline = glyph->outline; - n_points = outline.n_points; - - - if ( !( ctl_point < n_points ) ) - FT_INVALID_DATA; - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** SFNT NAME *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - FT_LOCAL_DEF( void ) - gxv_sfntName_validate( FT_UShort name_index, - FT_UShort min_index, - FT_UShort max_index, - GXV_Validator valid ) - { - FT_SfntName name; - FT_UInt i; - FT_UInt nnames; - - - GXV_NAME_ENTER( "sfntName" ); - - if ( name_index < min_index || max_index < name_index ) - FT_INVALID_FORMAT; - - nnames = FT_Get_Sfnt_Name_Count( valid->face ); - for ( i = 0; i < nnames; i++ ) - { - if ( FT_Get_Sfnt_Name( valid->face, i, &name ) != GXV_Err_Ok ) - continue ; - - if ( name.name_id == name_index ) - goto Out; - } - - GXV_TRACE(( " nameIndex = %d (UNTITLED)\n", name_index )); - FT_INVALID_DATA; - goto Exit; /* make compiler happy */ - - Out: - FT_TRACE1(( " nameIndex = %d (", name_index )); - GXV_TRACE_HEXDUMP_SFNTNAME( name ); - FT_TRACE1(( ")\n" )); - - Exit: - GXV_EXIT; - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** STATE TABLE *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - /* -------------------------- Class Table --------------------------- */ - - /* - * highestClass specifies how many classes are defined in this - * Class Subtable. Apple spec does not mention whether undefined - * holes in the class (e.g.: 0-3 are predefined, 4 is unused, 5 is used) - * are permitted. At present, holes in a defined class are not checked. - * -- suzuki toshiya - */ - - static void - gxv_ClassTable_validate( FT_Bytes table, - FT_UShort* length_p, - FT_UShort stateSize, - FT_Byte* maxClassID_p, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_Bytes limit = table + *length_p; - FT_UShort firstGlyph; - FT_UShort nGlyphs; - - - GXV_NAME_ENTER( "ClassTable" ); - - *maxClassID_p = 3; /* Classes 0, 2, and 3 are predefined */ - - GXV_LIMIT_CHECK( 2 + 2 ); - firstGlyph = FT_NEXT_USHORT( p ); - nGlyphs = FT_NEXT_USHORT( p ); - - GXV_TRACE(( " (firstGlyph = %d, nGlyphs = %d)\n", firstGlyph, nGlyphs )); - - if ( !nGlyphs ) - goto Out; - - gxv_glyphid_validate( (FT_UShort)( firstGlyph + nGlyphs ), valid ); - - { - FT_Byte nGlyphInClass[256]; - FT_Byte classID; - FT_UShort i; - - - ft_memset( nGlyphInClass, 0, 256 ); - - - for ( i = 0; i < nGlyphs; i++ ) - { - GXV_LIMIT_CHECK( 1 ); - classID = FT_NEXT_BYTE( p ); - switch ( classID ) - { - /* following classes should not appear in class array */ - case 0: /* end of text */ - case 2: /* out of bounds */ - case 3: /* end of line */ - FT_INVALID_DATA; - break; - - case 1: /* out of bounds */ - default: /* user-defined: 4 - ( stateSize - 1 ) */ - if ( classID >= stateSize ) - FT_INVALID_DATA; /* assign glyph to undefined state */ - - nGlyphInClass[classID]++; - break; - } - } - *length_p = (FT_UShort)( p - table ); - - /* scan max ClassID in use */ - for ( i = 0; i < stateSize; i++ ) - if ( ( 3 < i ) && ( nGlyphInClass[i] > 0 ) ) - *maxClassID_p = (FT_Byte)i; /* XXX: Check Range? */ - } - - Out: - GXV_TRACE(( "Declared stateSize=0x%02x, Used maxClassID=0x%02x\n", - stateSize, *maxClassID_p )); - GXV_EXIT; - } - - - /* --------------------------- State Array ----------------------------- */ - - static void - gxv_StateArray_validate( FT_Bytes table, - FT_UShort* length_p, - FT_Byte maxClassID, - FT_UShort stateSize, - FT_Byte* maxState_p, - FT_Byte* maxEntry_p, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_Bytes limit = table + *length_p; - FT_Byte clazz; - FT_Byte entry; - - FT_UNUSED( stateSize ); /* for the non-debugging case */ - - - GXV_NAME_ENTER( "StateArray" ); - - GXV_TRACE(( "parse %d bytes by stateSize=%d maxClassID=%d\n", - (int)(*length_p), stateSize, (int)(maxClassID) )); - - /* - * 2 states are predefined and must be described in StateArray: - * state 0 (start of text), 1 (start of line) - */ - GXV_LIMIT_CHECK( ( 1 + maxClassID ) * 2 ); - - *maxState_p = 0; - *maxEntry_p = 0; - - /* read if enough to read another state */ - while ( p + ( 1 + maxClassID ) <= limit ) - { - (*maxState_p)++; - for ( clazz = 0; clazz <= maxClassID; clazz++ ) - { - entry = FT_NEXT_BYTE( p ); - *maxEntry_p = (FT_Byte)FT_MAX( *maxEntry_p, entry ); - } - } - GXV_TRACE(( "parsed: maxState=%d, maxEntry=%d\n", - *maxState_p, *maxEntry_p )); - - *length_p = (FT_UShort)( p - table ); - - GXV_EXIT; - } - - - /* --------------------------- Entry Table ----------------------------- */ - - static void - gxv_EntryTable_validate( FT_Bytes table, - FT_UShort* length_p, - FT_Byte maxEntry, - FT_UShort stateArray, - FT_UShort stateArray_length, - FT_Byte maxClassID, - FT_Bytes statetable_table, - FT_Bytes statetable_limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_Bytes limit = table + *length_p; - FT_Byte entry; - FT_Byte state; - FT_Int entrySize = 2 + 2 + GXV_GLYPHOFFSET_SIZE( statetable ); - - GXV_XStateTable_GlyphOffsetDesc glyphOffset; - - - GXV_NAME_ENTER( "EntryTable" ); - - GXV_TRACE(( "maxEntry=%d entrySize=%d\n", maxEntry, entrySize )); - - if ( ( maxEntry + 1 ) * entrySize > *length_p ) - { - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_TOO_SHORT; - - /* ftxvalidator and FontValidator both warn and continue */ - maxEntry = (FT_Byte)( *length_p / entrySize - 1 ); - GXV_TRACE(( "too large maxEntry, shrinking to %d fit EntryTable length\n", - maxEntry )); - } - - for ( entry = 0; entry <= maxEntry; entry++ ) - { - FT_UShort newState; - FT_UShort flags; - - - GXV_LIMIT_CHECK( 2 + 2 ); - newState = FT_NEXT_USHORT( p ); - flags = FT_NEXT_USHORT( p ); - - - if ( newState < stateArray || - stateArray + stateArray_length < newState ) - { - GXV_TRACE(( " newState offset 0x%04x is out of stateArray\n", - newState )); - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_OFFSET; - continue; - } - - if ( 0 != ( ( newState - stateArray ) % ( 1 + maxClassID ) ) ) - { - GXV_TRACE(( " newState offset 0x%04x is not aligned to %d-classes\n", - newState, 1 + maxClassID )); - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_OFFSET; - continue; - } - - state = (FT_Byte)( ( newState - stateArray ) / ( 1 + maxClassID ) ); - - switch ( GXV_GLYPHOFFSET_FMT( statetable ) ) - { - case GXV_GLYPHOFFSET_NONE: - glyphOffset.uc = 0; /* make compiler happy */ - break; - - case GXV_GLYPHOFFSET_UCHAR: - glyphOffset.uc = FT_NEXT_BYTE( p ); - break; - - case GXV_GLYPHOFFSET_CHAR: - glyphOffset.c = FT_NEXT_CHAR( p ); - break; - - case GXV_GLYPHOFFSET_USHORT: - glyphOffset.u = FT_NEXT_USHORT( p ); - break; - - case GXV_GLYPHOFFSET_SHORT: - glyphOffset.s = FT_NEXT_SHORT( p ); - break; - - case GXV_GLYPHOFFSET_ULONG: - glyphOffset.ul = FT_NEXT_ULONG( p ); - break; - - case GXV_GLYPHOFFSET_LONG: - glyphOffset.l = FT_NEXT_LONG( p ); - break; - - default: - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_FORMAT; - goto Exit; - } - - if ( NULL != valid->statetable.entry_validate_func ) - valid->statetable.entry_validate_func( state, - flags, - &glyphOffset, - statetable_table, - statetable_limit, - valid ); - } - - Exit: - *length_p = (FT_UShort)( p - table ); - - GXV_EXIT; - } - - - /* =========================== State Table ============================= */ - - FT_LOCAL_DEF( void ) - gxv_StateTable_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[3]; - FT_UShort* l[3]; - FT_UShort buff[4]; - - - o[0] = classTable; - o[1] = stateArray; - o[2] = entryTable; - l[0] = classTable_length_p; - l[1] = stateArray_length_p; - l[2] = entryTable_length_p; - - gxv_set_length_by_ushort_offset( o, l, buff, 3, table_size, valid ); - } - - - FT_LOCAL_DEF( void ) - gxv_StateTable_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_UShort stateSize; - FT_UShort classTable; /* offset to Class(Sub)Table */ - FT_UShort stateArray; /* offset to StateArray */ - FT_UShort entryTable; /* offset to EntryTable */ - - FT_UShort classTable_length; - FT_UShort stateArray_length; - FT_UShort entryTable_length; - FT_Byte maxClassID; - FT_Byte maxState; - FT_Byte maxEntry; - - GXV_StateTable_Subtable_Setup_Func setup_func; - - FT_Bytes p = table; - - - GXV_NAME_ENTER( "StateTable" ); - - GXV_TRACE(( "StateTable header\n" )); - - GXV_LIMIT_CHECK( 2 + 2 + 2 + 2 ); - stateSize = FT_NEXT_USHORT( p ); - classTable = FT_NEXT_USHORT( p ); - stateArray = FT_NEXT_USHORT( p ); - entryTable = FT_NEXT_USHORT( p ); - - GXV_TRACE(( "stateSize=0x%04x\n", stateSize )); - GXV_TRACE(( "offset to classTable=0x%04x\n", classTable )); - GXV_TRACE(( "offset to stateArray=0x%04x\n", stateArray )); - GXV_TRACE(( "offset to entryTable=0x%04x\n", entryTable )); - - if ( stateSize > 0xFF ) - FT_INVALID_DATA; - - if ( valid->statetable.optdata_load_func != NULL ) - valid->statetable.optdata_load_func( p, limit, valid ); - - if ( valid->statetable.subtable_setup_func != NULL) - setup_func = valid->statetable.subtable_setup_func; - else - setup_func = gxv_StateTable_subtable_setup; - - setup_func( (FT_UShort)( limit - table ), - classTable, - stateArray, - entryTable, - &classTable_length, - &stateArray_length, - &entryTable_length, - valid ); - - GXV_TRACE(( "StateTable Subtables\n" )); - - if ( classTable != 0 ) - gxv_ClassTable_validate( table + classTable, - &classTable_length, - stateSize, - &maxClassID, - valid ); - else - maxClassID = (FT_Byte)( stateSize - 1 ); - - if ( stateArray != 0 ) - gxv_StateArray_validate( table + stateArray, - &stateArray_length, - maxClassID, - stateSize, - &maxState, - &maxEntry, - valid ); - else - { - maxState = 1; /* 0:start of text, 1:start of line are predefined */ - maxEntry = 0; - } - - if ( maxEntry > 0 && entryTable == 0 ) - FT_INVALID_OFFSET; - - if ( entryTable != 0 ) - gxv_EntryTable_validate( table + entryTable, - &entryTable_length, - maxEntry, - stateArray, - stateArray_length, - maxClassID, - table, - limit, - valid ); - - GXV_EXIT; - } - - - /* ================= eXtended State Table (for morx) =================== */ - - FT_LOCAL_DEF( void ) - gxv_XStateTable_subtable_setup( FT_ULong table_size, - FT_ULong classTable, - FT_ULong stateArray, - FT_ULong entryTable, - FT_ULong* classTable_length_p, - FT_ULong* stateArray_length_p, - FT_ULong* entryTable_length_p, - GXV_Validator valid ) - { - FT_ULong o[3]; - FT_ULong* l[3]; - FT_ULong buff[4]; - - - o[0] = classTable; - o[1] = stateArray; - o[2] = entryTable; - l[0] = classTable_length_p; - l[1] = stateArray_length_p; - l[2] = entryTable_length_p; - - gxv_set_length_by_ulong_offset( o, l, buff, 4, table_size, valid ); - } - - - static void - gxv_XClassTable_lookupval_validate( FT_UShort glyph, - GXV_LookupValueCPtr value_p, - GXV_Validator valid ) - { - FT_UNUSED( glyph ); - - if ( value_p->u >= valid->xstatetable.nClasses ) - FT_INVALID_DATA; - if ( value_p->u > valid->xstatetable.maxClassID ) - valid->xstatetable.maxClassID = value_p->u; - } - - - /* - +===============+ --------+ - | 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_XClassTable_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_XStateArray_validate( FT_Bytes table, - FT_ULong* length_p, - FT_UShort maxClassID, - FT_ULong stateSize, - FT_UShort* maxState_p, - FT_UShort* maxEntry_p, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_Bytes limit = table + *length_p; - FT_UShort clazz; - FT_UShort entry; - - FT_UNUSED( stateSize ); /* for the non-debugging case */ - - - GXV_NAME_ENTER( "XStateArray" ); - - GXV_TRACE(( "parse % 3d bytes by stateSize=% 3d maxClassID=% 3d\n", - (int)(*length_p), stateSize, (int)(maxClassID) )); - - /* - * 2 states are predefined and must be described: - * state 0 (start of text), 1 (start of line) - */ - GXV_LIMIT_CHECK( ( 1 + maxClassID ) * 2 * 2 ); - - *maxState_p = 0; - *maxEntry_p = 0; - - /* read if enough to read another state */ - while ( p + ( ( 1 + maxClassID ) * 2 ) <= limit ) - { - (*maxState_p)++; - for ( clazz = 0; clazz <= maxClassID; clazz++ ) - { - entry = FT_NEXT_USHORT( p ); - *maxEntry_p = (FT_UShort)FT_MAX( *maxEntry_p, entry ); - } - } - GXV_TRACE(( "parsed: maxState=%d, maxEntry=%d\n", - *maxState_p, *maxEntry_p )); - - *length_p = p - table; - - GXV_EXIT; - } - - - static void - gxv_XEntryTable_validate( FT_Bytes table, - FT_ULong* length_p, - FT_UShort maxEntry, - FT_ULong stateArray_length, - FT_UShort maxClassID, - FT_Bytes xstatetable_table, - FT_Bytes xstatetable_limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_Bytes limit = table + *length_p; - FT_UShort entry; - FT_UShort state; - FT_Int entrySize = 2 + 2 + GXV_GLYPHOFFSET_SIZE( xstatetable ); - - - GXV_NAME_ENTER( "XEntryTable" ); - GXV_TRACE(( "maxEntry=%d entrySize=%d\n", maxEntry, entrySize )); - - if ( ( p + ( maxEntry + 1 ) * entrySize ) > limit ) - FT_INVALID_TOO_SHORT; - - for (entry = 0; entry <= maxEntry ; entry++ ) - { - FT_UShort newState_idx; - FT_UShort flags; - GXV_XStateTable_GlyphOffsetDesc glyphOffset; - - - GXV_LIMIT_CHECK( 2 + 2 ); - newState_idx = FT_NEXT_USHORT( p ); - flags = FT_NEXT_USHORT( p ); - - if ( stateArray_length < (FT_ULong)( newState_idx * 2 ) ) - { - GXV_TRACE(( " newState index 0x%04x points out of stateArray\n", - newState_idx )); - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_OFFSET; - } - - state = (FT_UShort)( newState_idx / ( 1 + maxClassID ) ); - if ( 0 != ( newState_idx % ( 1 + maxClassID ) ) ) - { - FT_TRACE4(( "-> new state = %d (supposed)\n" - "but newState index 0x%04x is not aligned to %d-classes\n", - state, newState_idx, 1 + maxClassID )); - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_OFFSET; - } - - switch ( GXV_GLYPHOFFSET_FMT( xstatetable ) ) - { - case GXV_GLYPHOFFSET_NONE: - glyphOffset.uc = 0; /* make compiler happy */ - break; - - case GXV_GLYPHOFFSET_UCHAR: - glyphOffset.uc = FT_NEXT_BYTE( p ); - break; - - case GXV_GLYPHOFFSET_CHAR: - glyphOffset.c = FT_NEXT_CHAR( p ); - break; - - case GXV_GLYPHOFFSET_USHORT: - glyphOffset.u = FT_NEXT_USHORT( p ); - break; - - case GXV_GLYPHOFFSET_SHORT: - glyphOffset.s = FT_NEXT_SHORT( p ); - break; - - case GXV_GLYPHOFFSET_ULONG: - glyphOffset.ul = FT_NEXT_ULONG( p ); - break; - - case GXV_GLYPHOFFSET_LONG: - glyphOffset.l = FT_NEXT_LONG( p ); - break; - - default: - if ( valid->root->level >= FT_VALIDATE_PARANOID ) - FT_INVALID_FORMAT; - goto Exit; - } - - if ( NULL != valid->xstatetable.entry_validate_func ) - valid->xstatetable.entry_validate_func( state, - flags, - &glyphOffset, - xstatetable_table, - xstatetable_limit, - valid ); - } - - Exit: - *length_p = p - table; - - GXV_EXIT; - } - - - FT_LOCAL_DEF( void ) - gxv_XStateTable_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - /* StateHeader members */ - FT_ULong classTable; /* offset to Class(Sub)Table */ - FT_ULong stateArray; /* offset to StateArray */ - FT_ULong entryTable; /* offset to EntryTable */ - - FT_ULong classTable_length; - FT_ULong stateArray_length; - FT_ULong entryTable_length; - FT_UShort maxState; - FT_UShort maxEntry; - - GXV_XStateTable_Subtable_Setup_Func setup_func; - - FT_Bytes p = table; - - - GXV_NAME_ENTER( "XStateTable" ); - - GXV_TRACE(( "XStateTable header\n" )); - - GXV_LIMIT_CHECK( 4 + 4 + 4 + 4 ); - valid->xstatetable.nClasses = FT_NEXT_ULONG( p ); - classTable = FT_NEXT_ULONG( p ); - stateArray = FT_NEXT_ULONG( p ); - entryTable = FT_NEXT_ULONG( p ); - - GXV_TRACE(( "nClasses =0x%08x\n", valid->xstatetable.nClasses )); - GXV_TRACE(( "offset to classTable=0x%08x\n", classTable )); - GXV_TRACE(( "offset to stateArray=0x%08x\n", stateArray )); - GXV_TRACE(( "offset to entryTable=0x%08x\n", entryTable )); - - if ( valid->xstatetable.nClasses > 0xFFFFU ) - FT_INVALID_DATA; - - GXV_TRACE(( "StateTable Subtables\n" )); - - if ( valid->xstatetable.optdata_load_func != NULL ) - valid->xstatetable.optdata_load_func( p, limit, valid ); - - if ( valid->xstatetable.subtable_setup_func != NULL ) - setup_func = valid->xstatetable.subtable_setup_func; - else - setup_func = gxv_XStateTable_subtable_setup; - - setup_func( limit - table, - classTable, - stateArray, - entryTable, - &classTable_length, - &stateArray_length, - &entryTable_length, - valid ); - - if ( classTable != 0 ) - { - valid->xstatetable.maxClassID = 0; - valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED; - valid->lookupval_func = gxv_XClassTable_lookupval_validate; - valid->lookupfmt4_trans = gxv_XClassTable_lookupfmt4_transit; - gxv_LookupTable_validate( table + classTable, - table + classTable + classTable_length, - valid ); - if ( valid->subtable_length < classTable_length ) - classTable_length = valid->subtable_length; - } - else - { - /* XXX: check range? */ - valid->xstatetable.maxClassID = - (FT_UShort)( valid->xstatetable.nClasses - 1 ); - } - - if ( stateArray != 0 ) - gxv_XStateArray_validate( table + stateArray, - &stateArray_length, - valid->xstatetable.maxClassID, - valid->xstatetable.nClasses, - &maxState, - &maxEntry, - valid ); - else - { - maxState = 1; /* 0:start of text, 1:start of line are predefined */ - maxEntry = 0; - } - - if ( maxEntry > 0 && entryTable == 0 ) - FT_INVALID_OFFSET; - - if ( entryTable != 0 ) - gxv_XEntryTable_validate( table + entryTable, - &entryTable_length, - maxEntry, - stateArray_length, - valid->xstatetable.maxClassID, - table, - limit, - valid ); - - GXV_EXIT; - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** Table overlapping *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - static int - gxv_compare_ranges( FT_Bytes table1_start, - FT_ULong table1_length, - FT_Bytes table2_start, - FT_ULong table2_length ) - { - if ( table1_start == table2_start ) - { - if ( ( table1_length == 0 || table2_length == 0 ) ) - goto Out; - } - else if ( table1_start < table2_start ) - { - if ( ( table1_start + table1_length ) <= table2_start ) - goto Out; - } - else if ( table1_start > table2_start ) - { - if ( ( table1_start >= table2_start + table2_length ) ) - goto Out; - } - return 1; - - Out: - return 0; - } - - - FT_LOCAL_DEF( void ) - gxv_odtect_add_range( FT_Bytes start, - FT_ULong length, - const FT_String* name, - GXV_odtect_Range odtect ) - { - odtect->range[ odtect->nRanges ].start = start; - odtect->range[ odtect->nRanges ].length = length; - odtect->range[ odtect->nRanges ].name = (FT_String*)name; - odtect->nRanges++; - } - - - FT_LOCAL_DEF( void ) - gxv_odtect_validate( GXV_odtect_Range odtect, - GXV_Validator valid ) - { - FT_UInt i, j; - - - GXV_NAME_ENTER( "check overlap among multi ranges" ); - - for ( i = 0; i < odtect->nRanges; i++ ) - for ( j = 0; j < i; j++ ) - if ( 0 != gxv_compare_ranges( odtect->range[i].start, - odtect->range[i].length, - odtect->range[j].start, - odtect->range[j].length ) ) - { - if ( odtect->range[i].name || odtect->range[j].name ) - GXV_TRACE(( "found overlap between range %d and range %d\n", - i, j )); - else - GXV_TRACE(( "found overlap between `%s' and `%s\'\n", - odtect->range[i].name, - odtect->range[j].name )); - FT_INVALID_OFFSET; - } - - GXV_EXIT; - } - - -/* END */