1 /***************************************************************************/
5 /* TrueTypeGX/AAT common tables validation (body). */
7 /* Copyright 2004, 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
10 /* This file is part of the FreeType project, and may only be used, */
11 /* modified, and distributed under the terms of the FreeType project */
12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
13 /* this file you indicate that you have read the license and */
14 /* understand and accept it fully. */
16 /***************************************************************************/
18 /***************************************************************************/
20 /* gxvalid is derived from both gxlayout module and otvalid module. */
21 /* Development of gxlayout is supported by the Information-technology */
22 /* Promotion Agency(IPA), Japan. */
24 /***************************************************************************/
30 /*************************************************************************/
32 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
33 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
34 /* messages during execution. */
37 #define FT_COMPONENT trace_gxvcommon
40 /*************************************************************************/
41 /*************************************************************************/
43 /***** 16bit offset sorter *****/
45 /*************************************************************************/
46 /*************************************************************************/
49 gxv_compare_ushort_offset( FT_UShort
* a
,
62 gxv_set_length_by_ushort_offset( FT_UShort
* offset
,
72 for ( i
= 0; i
< nmemb
; i
++ )
75 for ( i
= 0; i
< nmemb
; i
++ )
79 ft_qsort( buff
, ( nmemb
+ 1 ), sizeof ( FT_UShort
),
80 ( int(*)(const void*, const void*) )gxv_compare_ushort_offset
);
82 if ( buff
[nmemb
] > limit
)
85 for ( i
= 0; i
< nmemb
; i
++ )
90 for ( j
= 0; j
< nmemb
; j
++ )
91 if ( buff
[j
] == offset
[i
] )
97 *(length
[i
]) = (FT_UShort
)( buff
[j
+ 1] - buff
[j
] );
99 if ( 0 != offset
[i
] && 0 == *(length
[i
]) )
105 /*************************************************************************/
106 /*************************************************************************/
108 /***** 32bit offset sorter *****/
110 /*************************************************************************/
111 /*************************************************************************/
114 gxv_compare_ulong_offset( FT_ULong
* a
,
127 gxv_set_length_by_ulong_offset( FT_ULong
* offset
,
137 for ( i
= 0; i
< nmemb
; i
++ )
140 for ( i
= 0; i
< nmemb
; i
++ )
144 ft_qsort( buff
, ( nmemb
+ 1 ), sizeof ( FT_ULong
),
145 ( int(*)(const void*, const void*) )gxv_compare_ulong_offset
);
147 if ( buff
[nmemb
] > limit
)
150 for ( i
= 0; i
< nmemb
; i
++ )
155 for ( j
= 0; j
< nmemb
; j
++ )
156 if ( buff
[j
] == offset
[i
] )
162 *(length
[i
]) = buff
[j
+ 1] - buff
[j
];
164 if ( 0 != offset
[i
] && 0 == *(length
[i
]) )
170 /*************************************************************************/
171 /*************************************************************************/
173 /***** scan value array and get min & max *****/
175 /*************************************************************************/
176 /*************************************************************************/
180 gxv_array_getlimits_byte( FT_Bytes table
,
184 GXV_Validator valid
)
197 GXV_LIMIT_CHECK( 1 );
198 val
= FT_NEXT_BYTE( p
);
200 *min
= (FT_Byte
)FT_MIN( *min
, val
);
201 *max
= (FT_Byte
)FT_MAX( *max
, val
);
204 valid
->subtable_length
= p
- table
;
209 gxv_array_getlimits_ushort( FT_Bytes table
,
213 GXV_Validator valid
)
226 GXV_LIMIT_CHECK( 2 );
227 val
= FT_NEXT_USHORT( p
);
229 *min
= (FT_Byte
)FT_MIN( *min
, val
);
230 *max
= (FT_Byte
)FT_MAX( *max
, val
);
233 valid
->subtable_length
= p
- table
;
237 /*************************************************************************/
238 /*************************************************************************/
240 /***** BINSEARCHHEADER *****/
242 /*************************************************************************/
243 /*************************************************************************/
245 typedef struct GXV_BinSrchHeader_
249 FT_UShort searchRange
;
250 FT_UShort entrySelector
;
251 FT_UShort rangeShift
;
257 gxv_BinSrchHeader_check_consistency( GXV_BinSrchHeader
* binSrchHeader
,
258 GXV_Validator valid
)
260 FT_UShort searchRange
;
261 FT_UShort entrySelector
;
262 FT_UShort rangeShift
;
265 if ( binSrchHeader
->unitSize
== 0 )
268 if ( binSrchHeader
->nUnits
== 0 )
270 if ( binSrchHeader
->searchRange
== 0 &&
271 binSrchHeader
->entrySelector
== 0 &&
272 binSrchHeader
->rangeShift
== 0 )
278 for ( searchRange
= 1, entrySelector
= 1;
279 ( searchRange
* 2 ) <= binSrchHeader
->nUnits
&&
280 searchRange
< 0x8000U
;
281 searchRange
*= 2, entrySelector
++ )
285 searchRange
= (FT_UShort
)( searchRange
* binSrchHeader
->unitSize
);
286 rangeShift
= (FT_UShort
)( binSrchHeader
->nUnits
* binSrchHeader
->unitSize
289 if ( searchRange
!= binSrchHeader
->searchRange
||
290 entrySelector
!= binSrchHeader
->entrySelector
||
291 rangeShift
!= binSrchHeader
->rangeShift
)
293 GXV_TRACE(( "Inconsistency found in BinSrchHeader\n" ));
294 GXV_TRACE(( "originally: unitSize=%d, nUnits=%d, "
295 "searchRange=%d, entrySelector=%d, "
297 binSrchHeader
->unitSize
, binSrchHeader
->nUnits
,
298 binSrchHeader
->searchRange
, binSrchHeader
->entrySelector
,
299 binSrchHeader
->rangeShift
));
300 GXV_TRACE(( "calculated: unitSize=%d, nUnits=%d, "
301 "searchRange=%d, entrySelector=%d, "
303 binSrchHeader
->unitSize
, binSrchHeader
->nUnits
,
304 searchRange
, entrySelector
, rangeShift
));
306 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
313 * parser & validator of BinSrchHeader
314 * which is used in LookupTable format 2, 4, 6.
316 * Essential parameters (unitSize, nUnits) are returned by
317 * given pointer, others (searchRange, entrySelector, rangeShift)
318 * can be calculated by essential parameters, so they are just
319 * validated and discarded.
321 * However, wrong values in searchRange, entrySelector, rangeShift
322 * won't cause fatal errors, because these parameters might be
323 * only used in old m68k font driver in MacOS.
324 * -- suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
328 gxv_BinSrchHeader_validate( FT_Bytes table
,
330 FT_UShort
* unitSize_p
,
332 GXV_Validator valid
)
335 GXV_BinSrchHeader binSrchHeader
;
338 GXV_NAME_ENTER( "BinSrchHeader validate" );
340 if ( *unitSize_p
== 0 )
342 GXV_LIMIT_CHECK( 2 );
343 binSrchHeader
.unitSize
= FT_NEXT_USHORT( p
);
346 binSrchHeader
.unitSize
= *unitSize_p
;
348 if ( *nUnits_p
== 0 )
350 GXV_LIMIT_CHECK( 2 );
351 binSrchHeader
.nUnits
= FT_NEXT_USHORT( p
);
354 binSrchHeader
.nUnits
= *nUnits_p
;
356 GXV_LIMIT_CHECK( 2 + 2 + 2 );
357 binSrchHeader
.searchRange
= FT_NEXT_USHORT( p
);
358 binSrchHeader
.entrySelector
= FT_NEXT_USHORT( p
);
359 binSrchHeader
.rangeShift
= FT_NEXT_USHORT( p
);
360 GXV_TRACE(( "nUnits %d\n", binSrchHeader
.nUnits
));
362 gxv_BinSrchHeader_check_consistency( &binSrchHeader
, valid
);
364 if ( *unitSize_p
== 0 )
365 *unitSize_p
= binSrchHeader
.unitSize
;
367 if ( *nUnits_p
== 0 )
368 *nUnits_p
= binSrchHeader
.nUnits
;
370 valid
->subtable_length
= p
- table
;
375 /*************************************************************************/
376 /*************************************************************************/
378 /***** LOOKUP TABLE *****/
380 /*************************************************************************/
381 /*************************************************************************/
383 #define GXV_LOOKUP_VALUE_LOAD( P, SIGNSPEC ) \
384 ( P += 2, gxv_lookup_value_load( P - 2, SIGNSPEC ) )
386 static GXV_LookupValueDesc
387 gxv_lookup_value_load( FT_Bytes p
,
390 GXV_LookupValueDesc v
;
393 if ( signspec
== GXV_LOOKUPVALUE_UNSIGNED
)
394 v
.u
= FT_NEXT_USHORT( p
);
396 v
.s
= FT_NEXT_SHORT( p
);
402 #define GXV_UNITSIZE_VALIDATE( FORMAT, UNITSIZE, NUNITS, CORRECTSIZE ) \
404 if ( UNITSIZE != CORRECTSIZE ) \
406 FT_ERROR(( "unitSize=%d differs from" \
407 "expected unitSize=%d" \
408 "in LookupTable %s", \
409 UNITSIZE, CORRECTSIZE, FORMAT )); \
410 if ( UNITSIZE != 0 && NUNITS != 0 ) \
412 FT_ERROR(( " cannot validate anymore\n" )); \
416 FT_ERROR(( " forcibly continues\n" )); \
421 /* ================= Simple Array Format 0 Lookup Table ================ */
423 gxv_LookupTable_fmt0_validate( FT_Bytes table
,
425 GXV_Validator valid
)
430 GXV_LookupValueDesc value
;
433 GXV_NAME_ENTER( "LookupTable format 0" );
435 GXV_LIMIT_CHECK( 2 * valid
->face
->num_glyphs
);
437 for ( i
= 0; i
< valid
->face
->num_glyphs
; i
++ )
439 GXV_LIMIT_CHECK( 2 );
440 if ( p
+ 2 >= limit
) /* some fonts have too-short fmt0 array */
442 GXV_TRACE(( "too short, glyphs %d - %d are missing\n",
443 i
, valid
->face
->num_glyphs
));
444 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
449 value
= GXV_LOOKUP_VALUE_LOAD( p
, valid
->lookupval_sign
);
450 valid
->lookupval_func( i
, value
, valid
);
453 valid
->subtable_length
= p
- table
;
458 /* ================= Segment Single Format 2 Loolup Table ============== */
462 * To guarantee that a binary search terminates, you must include one or
463 * more special `end of search table' values at the end of the data to
464 * be searched. The number of termination values that need to be
465 * included is table-specific. The value that indicates binary search
466 * termination is 0xFFFF.
468 * The problem is that nUnits does not include this end-marker. It's
469 * quite difficult to discriminate whether the following 0xFFFF comes from
470 * the end-marker or some next data.
472 * -- suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
475 gxv_LookupTable_fmt2_skip_endmarkers( FT_Bytes table
,
477 GXV_Validator valid
)
482 while ( ( p
+ 4 ) < valid
->root
->limit
)
484 if ( p
[0] != 0xFF || p
[1] != 0xFF || /* lastGlyph */
485 p
[2] != 0xFF || p
[3] != 0xFF ) /* firstGlyph */
490 valid
->subtable_length
= p
- table
;
495 gxv_LookupTable_fmt2_validate( FT_Bytes table
,
497 GXV_Validator valid
)
506 FT_UShort firstGlyph
;
507 GXV_LookupValueDesc value
;
510 GXV_NAME_ENTER( "LookupTable format 2" );
512 unitSize
= nUnits
= 0;
513 gxv_BinSrchHeader_validate( p
, limit
, &unitSize
, &nUnits
, valid
);
514 p
+= valid
->subtable_length
;
516 GXV_UNITSIZE_VALIDATE( "format2", unitSize
, nUnits
, 6 );
518 for ( unit
= 0, gid
= 0; unit
< nUnits
; unit
++ )
520 GXV_LIMIT_CHECK( 2 + 2 + 2 );
521 lastGlyph
= FT_NEXT_USHORT( p
);
522 firstGlyph
= FT_NEXT_USHORT( p
);
523 value
= GXV_LOOKUP_VALUE_LOAD( p
, valid
->lookupval_sign
);
525 gxv_glyphid_validate( firstGlyph
, valid
);
526 gxv_glyphid_validate( lastGlyph
, valid
);
528 if ( lastGlyph
< gid
)
530 GXV_TRACE(( "reverse ordered segment specification:"
531 " lastGlyph[%d]=%d < lastGlyph[%d]=%d\n",
532 unit
, lastGlyph
, unit
- 1 , gid
));
533 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
537 if ( lastGlyph
< firstGlyph
)
539 GXV_TRACE(( "reverse ordered range specification at unit %d:",
540 " lastGlyph %d < firstGlyph %d ",
541 unit
, lastGlyph
, firstGlyph
));
542 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
545 if ( valid
->root
->level
== FT_VALIDATE_TIGHT
)
546 continue; /* ftxvalidator silently skips such an entry */
548 FT_TRACE4(( "continuing with exchanged values\n" ));
550 firstGlyph
= lastGlyph
;
554 for ( gid
= firstGlyph
; gid
<= lastGlyph
; gid
++ )
555 valid
->lookupval_func( gid
, value
, valid
);
558 gxv_LookupTable_fmt2_skip_endmarkers( p
, unitSize
, valid
);
559 p
+= valid
->subtable_length
;
561 valid
->subtable_length
= p
- table
;
566 /* ================= Segment Array Format 4 Lookup Table =============== */
568 gxv_LookupTable_fmt4_validate( FT_Bytes table
,
570 GXV_Validator valid
)
579 FT_UShort firstGlyph
;
580 GXV_LookupValueDesc base_value
;
581 GXV_LookupValueDesc value
;
584 GXV_NAME_ENTER( "LookupTable format 4" );
586 unitSize
= nUnits
= 0;
587 gxv_BinSrchHeader_validate( p
, limit
, &unitSize
, &nUnits
, valid
);
588 p
+= valid
->subtable_length
;
590 GXV_UNITSIZE_VALIDATE( "format4", unitSize
, nUnits
, 6 );
592 for ( unit
= 0, gid
= 0; unit
< nUnits
; unit
++ )
594 GXV_LIMIT_CHECK( 2 + 2 );
595 lastGlyph
= FT_NEXT_USHORT( p
);
596 firstGlyph
= FT_NEXT_USHORT( p
);
598 gxv_glyphid_validate( firstGlyph
, valid
);
599 gxv_glyphid_validate( lastGlyph
, valid
);
601 if ( lastGlyph
< gid
)
603 GXV_TRACE(( "reverse ordered segment specification:"
604 " lastGlyph[%d]=%d < lastGlyph[%d]=%d\n",
605 unit
, lastGlyph
, unit
- 1 , gid
));
606 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
610 if ( lastGlyph
< firstGlyph
)
612 GXV_TRACE(( "reverse ordered range specification at unit %d:",
613 " lastGlyph %d < firstGlyph %d ",
614 unit
, lastGlyph
, firstGlyph
));
615 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
618 if ( valid
->root
->level
== FT_VALIDATE_TIGHT
)
619 continue; /* ftxvalidator silently skips such an entry */
621 FT_TRACE4(( "continuing with exchanged values\n" ));
623 firstGlyph
= lastGlyph
;
627 GXV_LIMIT_CHECK( 2 );
628 base_value
= GXV_LOOKUP_VALUE_LOAD( p
, GXV_LOOKUPVALUE_UNSIGNED
);
630 for ( gid
= firstGlyph
; gid
<= lastGlyph
; gid
++ )
632 value
= valid
->lookupfmt4_trans( (FT_UShort
)( gid
- firstGlyph
),
637 valid
->lookupval_func( gid
, value
, valid
);
641 gxv_LookupTable_fmt2_skip_endmarkers( p
, unitSize
, valid
);
642 p
+= valid
->subtable_length
;
644 valid
->subtable_length
= p
- table
;
649 /* ================= Segment Table Format 6 Lookup Table =============== */
651 gxv_LookupTable_fmt6_skip_endmarkers( FT_Bytes table
,
653 GXV_Validator valid
)
658 while ( p
< valid
->root
->limit
)
660 if ( p
[0] != 0xFF || p
[1] != 0xFF )
665 valid
->subtable_length
= p
- table
;
670 gxv_LookupTable_fmt6_validate( FT_Bytes table
,
672 GXV_Validator valid
)
676 FT_UShort prev_glyph
;
681 GXV_LookupValueDesc value
;
684 GXV_NAME_ENTER( "LookupTable format 6" );
686 unitSize
= nUnits
= 0;
687 gxv_BinSrchHeader_validate( p
, limit
, &unitSize
, &nUnits
, valid
);
688 p
+= valid
->subtable_length
;
690 GXV_UNITSIZE_VALIDATE( "format6", unitSize
, nUnits
, 4 );
692 for ( unit
= 0, prev_glyph
= 0; unit
< nUnits
; unit
++ )
694 GXV_LIMIT_CHECK( 2 + 2 );
695 glyph
= FT_NEXT_USHORT( p
);
696 value
= GXV_LOOKUP_VALUE_LOAD( p
, valid
->lookupval_sign
);
698 if ( gxv_glyphid_validate( glyph
, valid
) )
699 GXV_TRACE(( " endmarker found within defined range"
700 " (entry %d < nUnits=%d)\n",
703 if ( prev_glyph
> glyph
)
705 GXV_TRACE(( "current gid 0x%04x < previous gid 0x%04x\n",
706 glyph
, prev_glyph
));
707 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
712 valid
->lookupval_func( glyph
, value
, valid
);
715 gxv_LookupTable_fmt6_skip_endmarkers( p
, unitSize
, valid
);
716 p
+= valid
->subtable_length
;
718 valid
->subtable_length
= p
- table
;
723 /* ================= Trimmed Array Format 8 Lookup Table =============== */
725 gxv_LookupTable_fmt8_validate( FT_Bytes table
,
727 GXV_Validator valid
)
732 GXV_LookupValueDesc value
;
733 FT_UShort firstGlyph
;
734 FT_UShort glyphCount
;
737 GXV_NAME_ENTER( "LookupTable format 8" );
739 /* firstGlyph + glyphCount */
740 GXV_LIMIT_CHECK( 2 + 2 );
741 firstGlyph
= FT_NEXT_USHORT( p
);
742 glyphCount
= FT_NEXT_USHORT( p
);
744 gxv_glyphid_validate( firstGlyph
, valid
);
745 gxv_glyphid_validate( (FT_UShort
)( firstGlyph
+ glyphCount
), valid
);
748 for ( i
= 0; i
< glyphCount
; i
++ )
750 GXV_LIMIT_CHECK( 2 );
751 value
= GXV_LOOKUP_VALUE_LOAD( p
, valid
->lookupval_sign
);
752 valid
->lookupval_func( (FT_UShort
)( firstGlyph
+ i
), value
, valid
);
755 valid
->subtable_length
= p
- table
;
761 gxv_LookupTable_validate( FT_Bytes table
,
763 GXV_Validator valid
)
768 GXV_Validate_Func fmt_funcs_table
[] =
770 gxv_LookupTable_fmt0_validate
, /* 0 */
772 gxv_LookupTable_fmt2_validate
, /* 2 */
774 gxv_LookupTable_fmt4_validate
, /* 4 */
776 gxv_LookupTable_fmt6_validate
, /* 6 */
778 gxv_LookupTable_fmt8_validate
, /* 8 */
781 GXV_Validate_Func func
;
784 GXV_NAME_ENTER( "LookupTable" );
786 /* lookuptbl_head may be used in fmt4 transit function. */
787 valid
->lookuptbl_head
= table
;
790 GXV_LIMIT_CHECK( 2 );
791 format
= FT_NEXT_USHORT( p
);
792 GXV_TRACE(( " (format %d)\n", format
));
797 func
= fmt_funcs_table
[format
];
801 func( p
, limit
, valid
);
802 p
+= valid
->subtable_length
;
804 valid
->subtable_length
= p
- table
;
810 /*************************************************************************/
811 /*************************************************************************/
813 /***** Glyph ID *****/
815 /*************************************************************************/
816 /*************************************************************************/
818 FT_LOCAL_DEF( FT_Int
)
819 gxv_glyphid_validate( FT_UShort gid
,
820 GXV_Validator valid
)
825 if ( gid
== 0xFFFFU
)
832 if ( face
->num_glyphs
< gid
)
834 GXV_TRACE(( " gxv_glyphid_check() gid overflow: num_glyphs %d < %d\n",
835 face
->num_glyphs
, gid
));
836 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
844 /*************************************************************************/
845 /*************************************************************************/
847 /***** CONTROL POINT *****/
849 /*************************************************************************/
850 /*************************************************************************/
853 gxv_ctlPoint_validate( FT_UShort gid
,
855 GXV_Validator valid
)
867 error
= FT_Load_Glyph( face
,
869 FT_LOAD_NO_BITMAP
| FT_LOAD_IGNORE_TRANSFORM
);
874 outline
= glyph
->outline
;
875 n_points
= outline
.n_points
;
878 if ( !( ctl_point
< n_points
) )
883 /*************************************************************************/
884 /*************************************************************************/
886 /***** SFNT NAME *****/
888 /*************************************************************************/
889 /*************************************************************************/
892 gxv_sfntName_validate( FT_UShort name_index
,
895 GXV_Validator valid
)
902 GXV_NAME_ENTER( "sfntName" );
904 if ( name_index
< min_index
|| max_index
< name_index
)
907 nnames
= FT_Get_Sfnt_Name_Count( valid
->face
);
908 for ( i
= 0; i
< nnames
; i
++ )
910 if ( FT_Get_Sfnt_Name( valid
->face
, i
, &name
) != FT_Err_Ok
)
913 if ( name
.name_id
== name_index
)
917 GXV_TRACE(( " nameIndex = %d (UNTITLED)\n", name_index
));
919 goto Exit
; /* make compiler happy */
922 FT_TRACE1(( " nameIndex = %d (", name_index
));
923 GXV_TRACE_HEXDUMP_SFNTNAME( name
);
924 FT_TRACE1(( ")\n" ));
931 /*************************************************************************/
932 /*************************************************************************/
934 /***** STATE TABLE *****/
936 /*************************************************************************/
937 /*************************************************************************/
939 /* -------------------------- Class Table --------------------------- */
942 * highestClass specifies how many classes are defined in this
943 * Class Subtable. Apple spec does not mention whether undefined
944 * holes in the class (e.g.: 0-3 are predefined, 4 is unused, 5 is used)
945 * are permitted. At present, holes in a defined class are not checked.
946 * -- suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
950 gxv_ClassTable_validate( FT_Bytes table
,
953 FT_Byte
* maxClassID_p
,
954 GXV_Validator valid
)
957 FT_Bytes limit
= table
+ *length_p
;
958 FT_UShort firstGlyph
;
962 GXV_NAME_ENTER( "ClassTable" );
964 *maxClassID_p
= 3; /* Classes 0, 2, and 3 are predefined */
966 GXV_LIMIT_CHECK( 2 + 2 );
967 firstGlyph
= FT_NEXT_USHORT( p
);
968 nGlyphs
= FT_NEXT_USHORT( p
);
970 GXV_TRACE(( " (firstGlyph = %d, nGlyphs = %d)\n", firstGlyph
, nGlyphs
));
975 gxv_glyphid_validate( (FT_UShort
)( firstGlyph
+ nGlyphs
), valid
);
978 FT_Byte nGlyphInClass
[256];
983 ft_memset( nGlyphInClass
, 0, 256 );
986 for ( i
= 0; i
< nGlyphs
; i
++ )
988 GXV_LIMIT_CHECK( 1 );
989 classID
= FT_NEXT_BYTE( p
);
992 /* following classes should not appear in class array */
993 case 0: /* end of text */
994 case 2: /* out of bounds */
995 case 3: /* end of line */
999 case 1: /* out of bounds */
1000 default: /* user-defined: 4 - ( stateSize - 1 ) */
1001 if ( classID
>= stateSize
)
1002 FT_INVALID_DATA
; /* assign glyph to undefined state */
1004 nGlyphInClass
[classID
]++;
1008 *length_p
= (FT_UShort
)( p
- table
);
1010 /* scan max ClassID in use */
1011 for ( i
= 0; i
< stateSize
; i
++ )
1012 if ( ( 3 < i
) && ( nGlyphInClass
[i
] > 0 ) )
1013 *maxClassID_p
= (FT_Byte
)i
; /* XXX: Check Range? */
1017 GXV_TRACE(( "Declared stateSize=0x%02x, Used maxClassID=0x%02x\n",
1018 stateSize
, *maxClassID_p
));
1023 /* --------------------------- State Array ----------------------------- */
1026 gxv_StateArray_validate( FT_Bytes table
,
1027 FT_UShort
* length_p
,
1029 FT_UShort stateSize
,
1030 FT_Byte
* maxState_p
,
1031 FT_Byte
* maxEntry_p
,
1032 GXV_Validator valid
)
1035 FT_Bytes limit
= table
+ *length_p
;
1039 FT_UNUSED( stateSize
); /* for the non-debugging case */
1042 GXV_NAME_ENTER( "StateArray" );
1044 GXV_TRACE(( "parse %d bytes by stateSize=%d maxClassID=%d\n",
1045 (int)(*length_p
), stateSize
, (int)(maxClassID
) ));
1048 * 2 states are predefined and must be described in StateArray:
1049 * state 0 (start of text), 1 (start of line)
1051 GXV_LIMIT_CHECK( ( 1 + maxClassID
) * 2 );
1056 /* read if enough to read another state */
1057 while ( p
+ ( 1 + maxClassID
) <= limit
)
1060 for ( clazz
= 0; clazz
<= maxClassID
; clazz
++ )
1062 entry
= FT_NEXT_BYTE( p
);
1063 *maxEntry_p
= (FT_Byte
)FT_MAX( *maxEntry_p
, entry
);
1066 GXV_TRACE(( "parsed: maxState=%d, maxEntry=%d\n",
1067 *maxState_p
, *maxEntry_p
));
1069 *length_p
= (FT_UShort
)( p
- table
);
1075 /* --------------------------- Entry Table ----------------------------- */
1078 gxv_EntryTable_validate( FT_Bytes table
,
1079 FT_UShort
* length_p
,
1081 FT_UShort stateArray
,
1082 FT_UShort stateArray_length
,
1084 FT_Bytes statetable_table
,
1085 FT_Bytes statetable_limit
,
1086 GXV_Validator valid
)
1089 FT_Bytes limit
= table
+ *length_p
;
1092 FT_Int entrySize
= 2 + 2 + GXV_GLYPHOFFSET_SIZE( statetable
);
1094 GXV_XStateTable_GlyphOffsetDesc glyphOffset
;
1097 GXV_NAME_ENTER( "EntryTable" );
1099 GXV_TRACE(( "maxEntry=%d entrySize=%d\n", maxEntry
, entrySize
));
1101 if ( ( maxEntry
+ 1 ) * entrySize
> *length_p
)
1103 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
1104 FT_INVALID_TOO_SHORT
;
1106 /* ftxvalidator and FontValidator both warn and continue */
1107 maxEntry
= (FT_Byte
)( *length_p
/ entrySize
- 1 );
1108 GXV_TRACE(( "too large maxEntry, shrinking to %d fit EntryTable length\n",
1112 for ( entry
= 0; entry
<= maxEntry
; entry
++ )
1118 GXV_LIMIT_CHECK( 2 + 2 );
1119 newState
= FT_NEXT_USHORT( p
);
1120 flags
= FT_NEXT_USHORT( p
);
1123 if ( newState
< stateArray
||
1124 stateArray
+ stateArray_length
< newState
)
1126 GXV_TRACE(( " newState offset 0x%04x is out of stateArray\n",
1128 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
1133 if ( 0 != ( ( newState
- stateArray
) % ( 1 + maxClassID
) ) )
1135 GXV_TRACE(( " newState offset 0x%04x is not aligned to %d-classes\n",
1136 newState
, 1 + maxClassID
));
1137 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
1142 state
= (FT_Byte
)( ( newState
- stateArray
) / ( 1 + maxClassID
) );
1144 switch ( GXV_GLYPHOFFSET_FMT( statetable
) )
1146 case GXV_GLYPHOFFSET_NONE
:
1147 glyphOffset
.uc
= 0; /* make compiler happy */
1150 case GXV_GLYPHOFFSET_UCHAR
:
1151 glyphOffset
.uc
= FT_NEXT_BYTE( p
);
1154 case GXV_GLYPHOFFSET_CHAR
:
1155 glyphOffset
.c
= FT_NEXT_CHAR( p
);
1158 case GXV_GLYPHOFFSET_USHORT
:
1159 glyphOffset
.u
= FT_NEXT_USHORT( p
);
1162 case GXV_GLYPHOFFSET_SHORT
:
1163 glyphOffset
.s
= FT_NEXT_SHORT( p
);
1166 case GXV_GLYPHOFFSET_ULONG
:
1167 glyphOffset
.ul
= FT_NEXT_ULONG( p
);
1170 case GXV_GLYPHOFFSET_LONG
:
1171 glyphOffset
.l
= FT_NEXT_LONG( p
);
1175 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
1180 if ( NULL
!= valid
->statetable
.entry_validate_func
)
1181 valid
->statetable
.entry_validate_func( state
,
1190 *length_p
= (FT_UShort
)( p
- table
);
1196 /* =========================== State Table ============================= */
1198 FT_LOCAL_DEF( void )
1199 gxv_StateTable_subtable_setup( FT_UShort table_size
,
1200 FT_UShort classTable
,
1201 FT_UShort stateArray
,
1202 FT_UShort entryTable
,
1203 FT_UShort
* classTable_length_p
,
1204 FT_UShort
* stateArray_length_p
,
1205 FT_UShort
* entryTable_length_p
,
1206 GXV_Validator valid
)
1216 l
[0] = classTable_length_p
;
1217 l
[1] = stateArray_length_p
;
1218 l
[2] = entryTable_length_p
;
1220 gxv_set_length_by_ushort_offset( o
, l
, buff
, 3, table_size
, valid
);
1224 FT_LOCAL_DEF( void )
1225 gxv_StateTable_validate( FT_Bytes table
,
1227 GXV_Validator valid
)
1229 FT_UShort stateSize
;
1230 FT_UShort classTable
; /* offset to Class(Sub)Table */
1231 FT_UShort stateArray
; /* offset to StateArray */
1232 FT_UShort entryTable
; /* offset to EntryTable */
1234 FT_UShort classTable_length
;
1235 FT_UShort stateArray_length
;
1236 FT_UShort entryTable_length
;
1241 GXV_StateTable_Subtable_Setup_Func setup_func
;
1246 GXV_NAME_ENTER( "StateTable" );
1248 GXV_TRACE(( "StateTable header\n" ));
1250 GXV_LIMIT_CHECK( 2 + 2 + 2 + 2 );
1251 stateSize
= FT_NEXT_USHORT( p
);
1252 classTable
= FT_NEXT_USHORT( p
);
1253 stateArray
= FT_NEXT_USHORT( p
);
1254 entryTable
= FT_NEXT_USHORT( p
);
1256 GXV_TRACE(( "stateSize=0x%04x\n", stateSize
));
1257 GXV_TRACE(( "offset to classTable=0x%04x\n", classTable
));
1258 GXV_TRACE(( "offset to stateArray=0x%04x\n", stateArray
));
1259 GXV_TRACE(( "offset to entryTable=0x%04x\n", entryTable
));
1261 if ( stateSize
> 0xFF )
1264 if ( valid
->statetable
.optdata_load_func
!= NULL
)
1265 valid
->statetable
.optdata_load_func( p
, limit
, valid
);
1267 if ( valid
->statetable
.subtable_setup_func
!= NULL
)
1268 setup_func
= valid
->statetable
.subtable_setup_func
;
1270 setup_func
= gxv_StateTable_subtable_setup
;
1272 setup_func( (FT_UShort
)( limit
- table
),
1281 GXV_TRACE(( "StateTable Subtables\n" ));
1283 if ( classTable
!= 0 )
1284 gxv_ClassTable_validate( table
+ classTable
,
1290 maxClassID
= (FT_Byte
)( stateSize
- 1 );
1292 if ( stateArray
!= 0 )
1293 gxv_StateArray_validate( table
+ stateArray
,
1302 maxState
= 1; /* 0:start of text, 1:start of line are predefined */
1306 if ( maxEntry
> 0 && entryTable
== 0 )
1309 if ( entryTable
!= 0 )
1310 gxv_EntryTable_validate( table
+ entryTable
,
1324 /* ================= eXtended State Table (for morx) =================== */
1326 FT_LOCAL_DEF( void )
1327 gxv_XStateTable_subtable_setup( FT_ULong table_size
,
1328 FT_ULong classTable
,
1329 FT_ULong stateArray
,
1330 FT_ULong entryTable
,
1331 FT_ULong
* classTable_length_p
,
1332 FT_ULong
* stateArray_length_p
,
1333 FT_ULong
* entryTable_length_p
,
1334 GXV_Validator valid
)
1344 l
[0] = classTable_length_p
;
1345 l
[1] = stateArray_length_p
;
1346 l
[2] = entryTable_length_p
;
1348 gxv_set_length_by_ulong_offset( o
, l
, buff
, 4, table_size
, valid
);
1353 gxv_XClassTable_lookupval_validate( FT_UShort glyph
,
1354 GXV_LookupValueDesc value
,
1355 GXV_Validator valid
)
1359 if ( value
.u
>= valid
->xstatetable
.nClasses
)
1361 if ( value
.u
> valid
->xstatetable
.maxClassID
)
1362 valid
->xstatetable
.maxClassID
= value
.u
;
1367 +===============+ --------+
1374 | firstGlyph[0] | | head of lookup table
1375 +---------------+ | +
1376 | offset[0] | -> | offset [byte]
1377 +===============+ | +
1378 | lastGlyph[1] | | (glyphID - firstGlyph) * 2 [byte]
1392 static GXV_LookupValueDesc
1393 gxv_XClassTable_lookupfmt4_transit( FT_UShort relative_gindex
,
1394 GXV_LookupValueDesc base_value
,
1395 FT_Bytes lookuptbl_limit
,
1396 GXV_Validator valid
)
1401 GXV_LookupValueDesc value
;
1403 /* XXX: check range? */
1404 offset
= (FT_UShort
)( base_value
.u
+
1405 relative_gindex
* sizeof ( FT_UShort
) );
1407 p
= valid
->lookuptbl_head
+ offset
;
1408 limit
= lookuptbl_limit
;
1410 GXV_LIMIT_CHECK ( 2 );
1411 value
.u
= FT_NEXT_USHORT( p
);
1418 gxv_XStateArray_validate( FT_Bytes table
,
1420 FT_UShort maxClassID
,
1422 FT_UShort
* maxState_p
,
1423 FT_UShort
* maxEntry_p
,
1424 GXV_Validator valid
)
1427 FT_Bytes limit
= table
+ *length_p
;
1431 FT_UNUSED( stateSize
); /* for the non-debugging case */
1434 GXV_NAME_ENTER( "XStateArray" );
1436 GXV_TRACE(( "parse % 3d bytes by stateSize=% 3d maxClassID=% 3d\n",
1437 (int)(*length_p
), stateSize
, (int)(maxClassID
) ));
1440 * 2 states are predefined and must be described:
1441 * state 0 (start of text), 1 (start of line)
1443 GXV_LIMIT_CHECK( ( 1 + maxClassID
) * 2 * 2 );
1448 /* read if enough to read another state */
1449 while ( p
+ ( ( 1 + maxClassID
) * 2 ) <= limit
)
1452 for ( clazz
= 0; clazz
<= maxClassID
; clazz
++ )
1454 entry
= FT_NEXT_USHORT( p
);
1455 *maxEntry_p
= (FT_UShort
)FT_MAX( *maxEntry_p
, entry
);
1458 GXV_TRACE(( "parsed: maxState=%d, maxEntry=%d\n",
1459 *maxState_p
, *maxEntry_p
));
1461 *length_p
= p
- table
;
1468 gxv_XEntryTable_validate( FT_Bytes table
,
1471 FT_ULong stateArray_length
,
1472 FT_UShort maxClassID
,
1473 FT_Bytes xstatetable_table
,
1474 FT_Bytes xstatetable_limit
,
1475 GXV_Validator valid
)
1478 FT_Bytes limit
= table
+ *length_p
;
1481 FT_Int entrySize
= 2 + 2 + GXV_GLYPHOFFSET_SIZE( xstatetable
);
1484 GXV_NAME_ENTER( "XEntryTable" );
1485 GXV_TRACE(( "maxEntry=%d entrySize=%d\n", maxEntry
, entrySize
));
1487 if ( ( p
+ ( maxEntry
+ 1 ) * entrySize
) > limit
)
1488 FT_INVALID_TOO_SHORT
;
1490 for (entry
= 0; entry
<= maxEntry
; entry
++ )
1492 FT_UShort newState_idx
;
1494 GXV_XStateTable_GlyphOffsetDesc glyphOffset
;
1497 GXV_LIMIT_CHECK( 2 + 2 );
1498 newState_idx
= FT_NEXT_USHORT( p
);
1499 flags
= FT_NEXT_USHORT( p
);
1501 if ( stateArray_length
< (FT_ULong
)( newState_idx
* 2 ) )
1503 GXV_TRACE(( " newState index 0x%04x points out of stateArray\n",
1505 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
1509 state
= (FT_UShort
)( newState_idx
/ ( 1 + maxClassID
) );
1510 if ( 0 != ( newState_idx
% ( 1 + maxClassID
) ) )
1512 FT_TRACE4(( "-> new state = %d (supposed)\n"
1513 "but newState index 0x%04x is not aligned to %d-classes\n",
1514 state
, newState_idx
, 1 + maxClassID
));
1515 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
1519 switch ( GXV_GLYPHOFFSET_FMT( xstatetable
) )
1521 case GXV_GLYPHOFFSET_NONE
:
1522 glyphOffset
.uc
= 0; /* make compiler happy */
1525 case GXV_GLYPHOFFSET_UCHAR
:
1526 glyphOffset
.uc
= FT_NEXT_BYTE( p
);
1529 case GXV_GLYPHOFFSET_CHAR
:
1530 glyphOffset
.c
= FT_NEXT_CHAR( p
);
1533 case GXV_GLYPHOFFSET_USHORT
:
1534 glyphOffset
.u
= FT_NEXT_USHORT( p
);
1537 case GXV_GLYPHOFFSET_SHORT
:
1538 glyphOffset
.s
= FT_NEXT_SHORT( p
);
1541 case GXV_GLYPHOFFSET_ULONG
:
1542 glyphOffset
.ul
= FT_NEXT_ULONG( p
);
1545 case GXV_GLYPHOFFSET_LONG
:
1546 glyphOffset
.l
= FT_NEXT_LONG( p
);
1550 if ( valid
->root
->level
>= FT_VALIDATE_PARANOID
)
1555 if ( NULL
!= valid
->xstatetable
.entry_validate_func
)
1556 valid
->xstatetable
.entry_validate_func( state
,
1565 *length_p
= p
- table
;
1571 FT_LOCAL_DEF( void )
1572 gxv_XStateTable_validate( FT_Bytes table
,
1574 GXV_Validator valid
)
1576 /* StateHeader members */
1577 FT_ULong classTable
; /* offset to Class(Sub)Table */
1578 FT_ULong stateArray
; /* offset to StateArray */
1579 FT_ULong entryTable
; /* offset to EntryTable */
1581 FT_ULong classTable_length
;
1582 FT_ULong stateArray_length
;
1583 FT_ULong entryTable_length
;
1587 GXV_XStateTable_Subtable_Setup_Func setup_func
;
1592 GXV_NAME_ENTER( "XStateTable" );
1594 GXV_TRACE(( "XStateTable header\n" ));
1596 GXV_LIMIT_CHECK( 4 + 4 + 4 + 4 );
1597 valid
->xstatetable
.nClasses
= FT_NEXT_ULONG( p
);
1598 classTable
= FT_NEXT_ULONG( p
);
1599 stateArray
= FT_NEXT_ULONG( p
);
1600 entryTable
= FT_NEXT_ULONG( p
);
1602 GXV_TRACE(( "nClasses =0x%08x\n", valid
->xstatetable
.nClasses
));
1603 GXV_TRACE(( "offset to classTable=0x%08x\n", classTable
));
1604 GXV_TRACE(( "offset to stateArray=0x%08x\n", stateArray
));
1605 GXV_TRACE(( "offset to entryTable=0x%08x\n", entryTable
));
1607 if ( valid
->xstatetable
.nClasses
> 0xFFFFU
)
1610 GXV_TRACE(( "StateTable Subtables\n" ));
1612 if ( valid
->xstatetable
.optdata_load_func
!= NULL
)
1613 valid
->xstatetable
.optdata_load_func( p
, limit
, valid
);
1615 if ( valid
->xstatetable
.subtable_setup_func
!= NULL
)
1616 setup_func
= valid
->xstatetable
.subtable_setup_func
;
1618 setup_func
= gxv_XStateTable_subtable_setup
;
1620 setup_func( limit
- table
,
1629 if ( classTable
!= 0 )
1631 valid
->xstatetable
.maxClassID
= 0;
1632 valid
->lookupval_sign
= GXV_LOOKUPVALUE_UNSIGNED
;
1633 valid
->lookupval_func
= gxv_XClassTable_lookupval_validate
;
1634 valid
->lookupfmt4_trans
= gxv_XClassTable_lookupfmt4_transit
;
1635 gxv_LookupTable_validate( table
+ classTable
,
1636 table
+ classTable
+ classTable_length
,
1638 if ( valid
->subtable_length
< classTable_length
)
1639 classTable_length
= valid
->subtable_length
;
1643 /* XXX: check range? */
1644 valid
->xstatetable
.maxClassID
=
1645 (FT_UShort
)( valid
->xstatetable
.nClasses
- 1 );
1648 if ( stateArray
!= 0 )
1649 gxv_XStateArray_validate( table
+ stateArray
,
1651 valid
->xstatetable
.maxClassID
,
1652 valid
->xstatetable
.nClasses
,
1658 maxState
= 1; /* 0:start of text, 1:start of line are predefined */
1662 if ( maxEntry
> 0 && entryTable
== 0 )
1665 if ( entryTable
!= 0 )
1666 gxv_XEntryTable_validate( table
+ entryTable
,
1670 valid
->xstatetable
.maxClassID
,
1679 /*************************************************************************/
1680 /*************************************************************************/
1682 /***** Table overlapping *****/
1684 /*************************************************************************/
1685 /*************************************************************************/
1688 gxv_compare_ranges( FT_Bytes table1_start
,
1689 FT_ULong table1_length
,
1690 FT_Bytes table2_start
,
1691 FT_ULong table2_length
)
1693 if ( table1_start
== table2_start
)
1695 if ( ( table1_length
== 0 || table2_length
== 0 ) )
1698 else if ( table1_start
< table2_start
)
1700 if ( ( table1_start
+ table1_length
) <= table2_start
)
1703 else if ( table1_start
> table2_start
)
1705 if ( ( table1_start
>= table2_start
+ table2_length
) )
1715 FT_LOCAL_DEF( void )
1716 gxv_odtect_add_range( FT_Bytes start
,
1718 const FT_String
* name
,
1719 GXV_odtect_Range odtect
)
1721 odtect
->range
[ odtect
->nRanges
].start
= start
;
1722 odtect
->range
[ odtect
->nRanges
].length
= length
;
1723 odtect
->range
[ odtect
->nRanges
].name
= (FT_String
*)name
;
1728 FT_LOCAL_DEF( void )
1729 gxv_odtect_validate( GXV_odtect_Range odtect
,
1730 GXV_Validator valid
)
1735 GXV_NAME_ENTER( "check overlap among multi ranges" );
1737 for ( i
= 0; i
< odtect
->nRanges
; i
++ )
1738 for ( j
= 0; j
< i
; j
++ )
1739 if ( 0 != gxv_compare_ranges( odtect
->range
[i
].start
,
1740 odtect
->range
[i
].length
,
1741 odtect
->range
[j
].start
,
1742 odtect
->range
[j
].length
) )
1744 if ( odtect
->range
[i
].name
|| odtect
->range
[j
].name
)
1745 GXV_TRACE(( "found overlap between range %d and range %d\n",
1748 GXV_TRACE(( "found overlap between `%s' and `%s\'\n",
1749 odtect
->range
[i
].name
,
1750 odtect
->range
[j
].name
));