269 TRACE_SANITIZE (this);
270 if (unlikely (!u.header.version.sanitize (c))) return_trace (false);
271 switch (u.header.version.major) {
272 case 2: /* version 2 is compatible with version 1 */
273 case 1: return_trace (u.version1.sanitize (c));
274 default:return_trace (true);
275 }
276 }
277
278 protected:
279 union {
280 struct {
281 Tag ttcTag; /* TrueType Collection ID string: 'ttcf' */
282 FixedVersion<>version; /* Version of the TTC Header (1.0 or 2.0),
283 * 0x00010000u or 0x00020000u */
284 } header;
285 TTCHeaderVersion1 version1;
286 } u;
287 };
288
289
290 /*
291 * OpenType Font File
292 */
293
294 struct OpenTypeFontFile
295 {
296 static const hb_tag_t tableTag = HB_TAG ('_','_','_','_'); /* Sanitizer needs this. */
297
298 enum {
299 CFFTag = HB_TAG ('O','T','T','O'), /* OpenType with Postscript outlines */
300 TrueTypeTag = HB_TAG ( 0 , 1 , 0 , 0 ), /* OpenType with TrueType outlines */
301 TTCTag = HB_TAG ('t','t','c','f'), /* TrueType Collection */
302 TrueTag = HB_TAG ('t','r','u','e'), /* Obsolete Apple TrueType */
303 Typ1Tag = HB_TAG ('t','y','p','1') /* Obsolete Apple Type1 font in SFNT container */
304 };
305
306 inline hb_tag_t get_tag (void) const { return u.tag; }
307
308 inline unsigned int get_face_count (void) const
309 {
310 switch (u.tag) {
311 case CFFTag: /* All the non-collection tags */
312 case TrueTag:
313 case Typ1Tag:
314 case TrueTypeTag: return 1;
315 case TTCTag: return u.ttcHeader.get_face_count ();
316 default: return 0;
317 }
318 }
319 inline const OpenTypeFontFace& get_face (unsigned int i) const
320 {
321 switch (u.tag) {
322 /* Note: for non-collection SFNT data we ignore index. This is because
323 * Apple dfont container is a container of SFNT's. So each SFNT is a
324 * non-TTC, but the index is more than zero. */
325 case CFFTag: /* All the non-collection tags */
326 case TrueTag:
327 case Typ1Tag:
328 case TrueTypeTag: return u.fontFace;
329 case TTCTag: return u.ttcHeader.get_face (i);
330 default: return Null(OpenTypeFontFace);
331 }
332 }
333
334 inline bool serialize_single (hb_serialize_context_t *c,
335 hb_tag_t sfnt_tag,
336 Supplier<hb_tag_t> &tags,
337 Supplier<hb_blob_t *> &blobs,
338 unsigned int table_count)
339 {
340 TRACE_SERIALIZE (this);
341 assert (sfnt_tag != TTCTag);
342 if (unlikely (!c->extend_min (*this))) return_trace (false);
343 return_trace (u.fontFace.serialize (c, sfnt_tag, tags, blobs, table_count));
344 }
345
346 inline bool sanitize (hb_sanitize_context_t *c) const
347 {
348 TRACE_SANITIZE (this);
349 if (unlikely (!u.tag.sanitize (c))) return_trace (false);
350 switch (u.tag) {
351 case CFFTag: /* All the non-collection tags */
352 case TrueTag:
353 case Typ1Tag:
354 case TrueTypeTag: return_trace (u.fontFace.sanitize (c));
355 case TTCTag: return_trace (u.ttcHeader.sanitize (c));
356 default: return_trace (true);
357 }
358 }
359
360 protected:
361 union {
362 Tag tag; /* 4-byte identifier. */
363 OpenTypeFontFace fontFace;
364 TTCHeader ttcHeader;
365 } u;
366 public:
367 DEFINE_SIZE_UNION (4, tag);
368 };
369
370
371 } /* namespace OT */
372
373
374 #endif /* HB_OPEN_FILE_PRIVATE_HH */
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269 TRACE_SANITIZE (this);
270 if (unlikely (!u.header.version.sanitize (c))) return_trace (false);
271 switch (u.header.version.major) {
272 case 2: /* version 2 is compatible with version 1 */
273 case 1: return_trace (u.version1.sanitize (c));
274 default:return_trace (true);
275 }
276 }
277
278 protected:
279 union {
280 struct {
281 Tag ttcTag; /* TrueType Collection ID string: 'ttcf' */
282 FixedVersion<>version; /* Version of the TTC Header (1.0 or 2.0),
283 * 0x00010000u or 0x00020000u */
284 } header;
285 TTCHeaderVersion1 version1;
286 } u;
287 };
288
289 /*
290 * Mac Resource Fork
291 */
292
293 struct ResourceRefItem
294 {
295 inline bool sanitize (hb_sanitize_context_t *c) const
296 {
297 TRACE_SANITIZE (this);
298 // actual data sanitization is done on ResourceForkHeader sanitizer
299 return_trace (likely (c->check_struct (this)));
300 }
301
302 HBINT16 id; /* Resource ID, is really should be signed? */
303 HBINT16 nameOffset; /* Offset from beginning of resource name list
304 * to resource name, minus means there is no */
305 HBUINT8 attr; /* Resource attributes */
306 HBUINT24 dataOffset; /* Offset from beginning of resource data to
307 * data for this resource */
308 HBUINT32 reserved; /* Reserved for handle to resource */
309 public:
310 DEFINE_SIZE_STATIC (12);
311 };
312
313 struct ResourceTypeItem
314 {
315 inline bool sanitize (hb_sanitize_context_t *c) const
316 {
317 TRACE_SANITIZE (this);
318 // RefList sanitization is done on ResourceMap sanitizer
319 return_trace (likely (c->check_struct (this)));
320 }
321
322 inline unsigned int get_resource_count () const
323 {
324 return numRes + 1;
325 }
326
327 inline bool is_sfnt () const
328 {
329 return type == HB_TAG ('s','f','n','t');
330 }
331
332 inline const ResourceRefItem& get_ref_item (const void *base,
333 unsigned int i) const
334 {
335 return (base+refList)[i];
336 }
337
338 protected:
339 Tag type; /* Resource type */
340 HBUINT16 numRes; /* Number of resource this type in map minus 1 */
341 OffsetTo<UnsizedArrayOf<ResourceRefItem> >
342 refList; /* Offset from beginning of resource type list
343 * to reference list for this type */
344 public:
345 DEFINE_SIZE_STATIC (8);
346 };
347
348 struct ResourceMap
349 {
350 inline bool sanitize (hb_sanitize_context_t *c) const
351 {
352 TRACE_SANITIZE (this);
353 if (unlikely (!c->check_struct (this)))
354 return_trace (false);
355 for (unsigned int i = 0; i < get_types_count (); ++i)
356 {
357 const ResourceTypeItem& type = get_type (i);
358 if (unlikely (!type.sanitize (c)))
359 return_trace (false);
360 for (unsigned int j = 0; j < type.get_resource_count (); ++j)
361 if (unlikely (!get_ref_item (type, j).sanitize (c)))
362 return_trace (false);
363 }
364 return_trace (true);
365 }
366
367 inline const ResourceTypeItem& get_type (unsigned int i) const
368 {
369 // Why offset from the second byte of the object? I'm not sure
370 return ((&reserved[2])+typeList)[i];
371 }
372
373 inline unsigned int get_types_count () const
374 {
375 return nTypes + 1;
376 }
377
378 inline const ResourceRefItem &get_ref_item (const ResourceTypeItem &type,
379 unsigned int i) const
380 {
381 return type.get_ref_item (&(this+typeList), i);
382 }
383
384 inline const PString& get_name (const ResourceRefItem &item,
385 unsigned int i) const
386 {
387 if (item.nameOffset == -1)
388 return Null (PString);
389
390 return StructAtOffset<PString> (this, nameList + item.nameOffset);
391 }
392
393 protected:
394 HBUINT8 reserved[16]; /* Reserved for copy of resource header */
395 LOffsetTo<ResourceMap>
396 reserved1; /* Reserved for handle to next resource map */
397 HBUINT16 reserved2; /* Reserved for file reference number */
398 HBUINT16 attr; /* Resource fork attribute */
399 OffsetTo<UnsizedArrayOf<ResourceTypeItem> >
400 typeList; /* Offset from beginning of map to
401 * resource type list */
402 HBUINT16 nameList; /* Offset from beginning of map to
403 * resource name list */
404 HBUINT16 nTypes; /* Number of types in the map minus 1 */
405 public:
406 DEFINE_SIZE_STATIC (30);
407 };
408
409 struct ResourceForkHeader
410 {
411 inline unsigned int get_face_count () const
412 {
413 const ResourceMap &resource_map = this+map;
414 for (unsigned int i = 0; i < resource_map.get_types_count (); ++i)
415 {
416 const ResourceTypeItem& type = resource_map.get_type (i);
417 if (type.is_sfnt ())
418 return type.get_resource_count ();
419 }
420 return 0;
421 }
422
423 inline const LArrayOf<HBUINT8>& get_data (const ResourceTypeItem& type,
424 unsigned int idx) const
425 {
426 const ResourceMap &resource_map = this+map;
427 unsigned int offset = dataOffset;
428 offset += resource_map.get_ref_item (type, idx).dataOffset;
429 return StructAtOffset<LArrayOf<HBUINT8> > (this, offset);
430 }
431
432 inline const OpenTypeFontFace& get_face (unsigned int idx) const
433 {
434 const ResourceMap &resource_map = this+map;
435 for (unsigned int i = 0; i < resource_map.get_types_count (); ++i)
436 {
437 const ResourceTypeItem& type = resource_map.get_type (i);
438 if (type.is_sfnt () && idx < type.get_resource_count ())
439 return (OpenTypeFontFace&) get_data (type, idx).arrayZ;
440 }
441 return Null (OpenTypeFontFace);
442 }
443
444 inline bool sanitize (hb_sanitize_context_t *c) const
445 {
446 TRACE_SANITIZE (this);
447 if (unlikely (!c->check_struct (this)))
448 return_trace (false);
449
450 const ResourceMap &resource_map = this+map;
451 if (unlikely (!resource_map.sanitize (c)))
452 return_trace (false);
453
454 for (unsigned int i = 0; i < resource_map.get_types_count (); ++i)
455 {
456 const ResourceTypeItem& type = resource_map.get_type (i);
457 for (unsigned int j = 0; j < type.get_resource_count (); ++j)
458 {
459 const LArrayOf<HBUINT8>& data = get_data (type, j);
460 if (unlikely (!(data.sanitize (c) &&
461 ((OpenTypeFontFace&) data.arrayZ).sanitize (c))))
462 return_trace (false);
463 }
464 }
465
466 return_trace (true);
467 }
468
469 protected:
470 HBUINT32 dataOffset; /* Offset from beginning of resource fork
471 * to resource data */
472 LOffsetTo<ResourceMap>
473 map; /* Offset from beginning of resource fork
474 * to resource map */
475 HBUINT32 dataLen; /* Length of resource data */
476 HBUINT32 mapLen; /* Length of resource map */
477 public:
478 DEFINE_SIZE_STATIC (16);
479 };
480
481 /*
482 * OpenType Font File
483 */
484
485 struct OpenTypeFontFile
486 {
487 static const hb_tag_t tableTag = HB_TAG ('_','_','_','_'); /* Sanitizer needs this. */
488
489 enum {
490 CFFTag = HB_TAG ('O','T','T','O'), /* OpenType with Postscript outlines */
491 TrueTypeTag = HB_TAG ( 0 , 1 , 0 , 0 ), /* OpenType with TrueType outlines */
492 TTCTag = HB_TAG ('t','t','c','f'), /* TrueType Collection */
493 DFontTag = HB_TAG ( 0 , 0 , 1 , 0 ), /* DFont Mac Resource Fork */
494 TrueTag = HB_TAG ('t','r','u','e'), /* Obsolete Apple TrueType */
495 Typ1Tag = HB_TAG ('t','y','p','1') /* Obsolete Apple Type1 font in SFNT container */
496 };
497
498 inline hb_tag_t get_tag (void) const { return u.tag; }
499
500 inline unsigned int get_face_count (void) const
501 {
502 switch (u.tag) {
503 case CFFTag: /* All the non-collection tags */
504 case TrueTag:
505 case Typ1Tag:
506 case TrueTypeTag: return 1;
507 case TTCTag: return u.ttcHeader.get_face_count ();
508 // case DFontTag: return u.rfHeader.get_face_count ();
509 default: return 0;
510 }
511 }
512 inline const OpenTypeFontFace& get_face (unsigned int i) const
513 {
514 switch (u.tag) {
515 /* Note: for non-collection SFNT data we ignore index. This is because
516 * Apple dfont container is a container of SFNT's. So each SFNT is a
517 * non-TTC, but the index is more than zero. */
518 case CFFTag: /* All the non-collection tags */
519 case TrueTag:
520 case Typ1Tag:
521 case TrueTypeTag: return u.fontFace;
522 case TTCTag: return u.ttcHeader.get_face (i);
523 // case DFontTag: return u.rfHeader.get_face (i);
524 default: return Null(OpenTypeFontFace);
525 }
526 }
527
528 inline bool serialize_single (hb_serialize_context_t *c,
529 hb_tag_t sfnt_tag,
530 Supplier<hb_tag_t> &tags,
531 Supplier<hb_blob_t *> &blobs,
532 unsigned int table_count)
533 {
534 TRACE_SERIALIZE (this);
535 assert (sfnt_tag != TTCTag);
536 if (unlikely (!c->extend_min (*this))) return_trace (false);
537 return_trace (u.fontFace.serialize (c, sfnt_tag, tags, blobs, table_count));
538 }
539
540 inline bool sanitize (hb_sanitize_context_t *c) const
541 {
542 TRACE_SANITIZE (this);
543 if (unlikely (!u.tag.sanitize (c))) return_trace (false);
544 switch (u.tag) {
545 case CFFTag: /* All the non-collection tags */
546 case TrueTag:
547 case Typ1Tag:
548 case TrueTypeTag: return_trace (u.fontFace.sanitize (c));
549 case TTCTag: return_trace (u.ttcHeader.sanitize (c));
550 // case DFontTag: return_trace (u.rfHeader.sanitize (c));
551 default: return_trace (true);
552 }
553 }
554
555 protected:
556 union {
557 Tag tag; /* 4-byte identifier. */
558 OpenTypeFontFace fontFace;
559 TTCHeader ttcHeader;
560 ResourceForkHeader rfHeader;
561 } u;
562 public:
563 DEFINE_SIZE_UNION (4, tag);
564 };
565
566
567 } /* namespace OT */
568
569
570 #endif /* HB_OPEN_FILE_PRIVATE_HH */
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