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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /*
2 * Copyright © 2009 Red Hat, Inc.
3 * Copyright © 2018 Ebrahim Byagowi
4 *
5 * This is part of HarfBuzz, a text shaping library.
6 *
7 * Permission is hereby granted, without written agreement and without
8 * license or royalty fees, to use, copy, modify, and distribute this
9 * software and its documentation for any purpose, provided that the
10 * above copyright notice and the following two paragraphs appear in
11 * all copies of this software.
12 *
13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
17 * DAMAGE.
18 *
19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 *
25 * Red Hat Author(s): Behdad Esfahbod
26 */
27
28 #include "hb.hh"
29 #include "hb-blob.hh"
30
31 #ifdef HAVE_SYS_MMAN_H
32 #ifdef HAVE_UNISTD_H
33 #include <unistd.h>
34 #endif /* HAVE_UNISTD_H */
35 #include <sys/mman.h>
36 #endif /* HAVE_SYS_MMAN_H */
37
38
39 /**
40 * SECTION: hb-blob
41 * @title: hb-blob
42 * @short_description: Binary data containers
43 * @include: hb.h
44 *
45 * Blobs wrap a chunk of binary data to handle lifecycle management of data
46 * while it is passed between client and HarfBuzz. Blobs are primarily used
47 * to create font faces, but also to access font face tables, as well as
48 * pass around other binary data.
49 **/
50
51
52 /**
53 * hb_blob_create: (skip)
54 * @data: Pointer to blob data.
55 * @length: Length of @data in bytes.
56 * @mode: Memory mode for @data.
57 * @user_data: Data parameter to pass to @destroy.
58 * @destroy: (nullable): Callback to call when @data is not needed anymore.
59 *
60 * Creates a new "blob" object wrapping @data. The @mode parameter is used
61 * to negotiate ownership and lifecycle of @data.
62 *
63 * Return value: New blob, or the empty blob if something failed or if @length is
64 * zero. Destroy with hb_blob_destroy().
65 *
66 * Since: 0.9.2
67 **/
68 hb_blob_t *
69 hb_blob_create (const char *data,
70 unsigned int length,
71 hb_memory_mode_t mode,
72 void *user_data,
73 hb_destroy_func_t destroy)
74 {
75 if (!length)
76 {
77 if (destroy)
78 destroy (user_data);
79 return hb_blob_get_empty ();
80 }
81
82 hb_blob_t *blob = hb_blob_create_or_fail (data, length, mode,
83 user_data, destroy);
84 return likely (blob) ? blob : hb_blob_get_empty ();
85 }
86
87 /**
88 * hb_blob_create_or_fail: (skip)
89 * @data: Pointer to blob data.
90 * @length: Length of @data in bytes.
91 * @mode: Memory mode for @data.
92 * @user_data: Data parameter to pass to @destroy.
93 * @destroy: (nullable): Callback to call when @data is not needed anymore.
94 *
95 * Creates a new "blob" object wrapping @data. The @mode parameter is used
96 * to negotiate ownership and lifecycle of @data.
97 *
98 * Note that this function returns a freshly-allocated empty blob even if @length
99 * is zero. This is in contrast to hb_blob_create(), which returns the singleton
100 * empty blob (as returned by hb_blob_get_empty()) if @length is zero.
101 *
102 * Return value: New blob, or `NULL` if failed. Destroy with hb_blob_destroy().
103 *
104 * Since: 2.8.2
105 **/
106 hb_blob_t *
107 hb_blob_create_or_fail (const char *data,
108 unsigned int length,
109 hb_memory_mode_t mode,
110 void *user_data,
111 hb_destroy_func_t destroy)
112 {
113 hb_blob_t *blob;
114
115 if (length >= 1u << 31 ||
116 !(blob = hb_object_create<hb_blob_t> ()))
117 {
118 if (destroy)
119 destroy (user_data);
120 return nullptr;
121 }
122
123 blob->data = data;
124 blob->length = length;
125 blob->mode = mode;
126
127 blob->user_data = user_data;
128 blob->destroy = destroy;
129
130 if (blob->mode == HB_MEMORY_MODE_DUPLICATE) {
131 blob->mode = HB_MEMORY_MODE_READONLY;
132 if (!blob->try_make_writable ())
133 {
134 hb_blob_destroy (blob);
135 return nullptr;
136 }
137 }
138
139 return blob;
140 }
141
142 static void
143 _hb_blob_destroy (void *data)
144 {
145 hb_blob_destroy ((hb_blob_t *) data);
146 }
147
148 /**
149 * hb_blob_create_sub_blob:
150 * @parent: Parent blob.
151 * @offset: Start offset of sub-blob within @parent, in bytes.
152 * @length: Length of sub-blob.
153 *
154 * Returns a blob that represents a range of bytes in @parent. The new
155 * blob is always created with #HB_MEMORY_MODE_READONLY, meaning that it
156 * will never modify data in the parent blob. The parent data is not
157 * expected to be modified, and will result in undefined behavior if it
158 * is.
159 *
160 * Makes @parent immutable.
161 *
162 * Return value: New blob, or the empty blob if something failed or if
163 * @length is zero or @offset is beyond the end of @parent's data. Destroy
164 * with hb_blob_destroy().
165 *
166 * Since: 0.9.2
167 **/
168 hb_blob_t *
169 hb_blob_create_sub_blob (hb_blob_t *parent,
170 unsigned int offset,
171 unsigned int length)
172 {
173 hb_blob_t *blob;
174
175 if (!length || !parent || offset >= parent->length)
176 return hb_blob_get_empty ();
177
178 hb_blob_make_immutable (parent);
179
180 blob = hb_blob_create (parent->data + offset,
181 hb_min (length, parent->length - offset),
182 HB_MEMORY_MODE_READONLY,
183 hb_blob_reference (parent),
184 _hb_blob_destroy);
185
186 return blob;
187 }
188
189 /**
190 * hb_blob_copy_writable_or_fail:
191 * @blob: A blob.
192 *
193 * Makes a writable copy of @blob.
194 *
195 * Return value: The new blob, or nullptr if allocation failed
196 *
197 * Since: 1.8.0
198 **/
199 hb_blob_t *
200 hb_blob_copy_writable_or_fail (hb_blob_t *blob)
201 {
202 blob = hb_blob_create (blob->data,
203 blob->length,
204 HB_MEMORY_MODE_DUPLICATE,
205 nullptr,
206 nullptr);
207
208 if (unlikely (blob == hb_blob_get_empty ()))
209 blob = nullptr;
210
211 return blob;
212 }
213
214 /**
215 * hb_blob_get_empty:
216 *
217 * Returns the singleton empty blob.
218 *
219 * See TODO:link object types for more information.
220 *
221 * Return value: (transfer full): The empty blob.
222 *
223 * Since: 0.9.2
224 **/
225 hb_blob_t *
226 hb_blob_get_empty ()
227 {
228 return const_cast<hb_blob_t *> (&Null (hb_blob_t));
229 }
230
231 /**
232 * hb_blob_reference: (skip)
233 * @blob: a blob.
234 *
235 * Increases the reference count on @blob.
236 *
237 * See TODO:link object types for more information.
238 *
239 * Return value: @blob.
240 *
241 * Since: 0.9.2
242 **/
243 hb_blob_t *
244 hb_blob_reference (hb_blob_t *blob)
245 {
246 return hb_object_reference (blob);
247 }
248
249 /**
250 * hb_blob_destroy: (skip)
251 * @blob: a blob.
252 *
253 * Decreases the reference count on @blob, and if it reaches zero, destroys
254 * @blob, freeing all memory, possibly calling the destroy-callback the blob
255 * was created for if it has not been called already.
256 *
257 * See TODO:link object types for more information.
258 *
259 * Since: 0.9.2
260 **/
261 void
262 hb_blob_destroy (hb_blob_t *blob)
263 {
264 if (!hb_object_destroy (blob)) return;
265
266 hb_free (blob);
267 }
268
269 /**
270 * hb_blob_set_user_data: (skip)
271 * @blob: An #hb_blob_t
272 * @key: The user-data key to set
273 * @data: A pointer to the user data to set
274 * @destroy: (nullable): A callback to call when @data is not needed anymore
275 * @replace: Whether to replace an existing data with the same key
276 *
277 * Attaches a user-data key/data pair to the specified blob.
278 *
279 * Return value: `true` if success, `false` otherwise
280 *
281 * Since: 0.9.2
282 **/
283 hb_bool_t
284 hb_blob_set_user_data (hb_blob_t *blob,
285 hb_user_data_key_t *key,
286 void * data,
287 hb_destroy_func_t destroy,
288 hb_bool_t replace)
289 {
290 return hb_object_set_user_data (blob, key, data, destroy, replace);
291 }
292
293 /**
294 * hb_blob_get_user_data: (skip)
295 * @blob: a blob
296 * @key: The user-data key to query
297 *
298 * Fetches the user data associated with the specified key,
299 * attached to the specified font-functions structure.
300 *
301 * Return value: (transfer none): A pointer to the user data
302 *
303 * Since: 0.9.2
304 **/
305 void *
306 hb_blob_get_user_data (const hb_blob_t *blob,
307 hb_user_data_key_t *key)
308 {
309 return hb_object_get_user_data (blob, key);
310 }
311
312
313 /**
314 * hb_blob_make_immutable:
315 * @blob: a blob
316 *
317 * Makes a blob immutable.
318 *
319 * Since: 0.9.2
320 **/
321 void
322 hb_blob_make_immutable (hb_blob_t *blob)
323 {
324 if (hb_object_is_immutable (blob))
325 return;
326
327 hb_object_make_immutable (blob);
328 }
329
330 /**
331 * hb_blob_is_immutable:
332 * @blob: a blob.
333 *
334 * Tests whether a blob is immutable.
335 *
336 * Return value: `true` if @blob is immutable, `false` otherwise
337 *
338 * Since: 0.9.2
339 **/
340 hb_bool_t
341 hb_blob_is_immutable (hb_blob_t *blob)
342 {
343 return hb_object_is_immutable (blob);
344 }
345
346
347 /**
348 * hb_blob_get_length:
349 * @blob: a blob.
350 *
351 * Fetches the length of a blob's data.
352 *
353 * Return value: the length of @blob data in bytes.
354 *
355 * Since: 0.9.2
356 **/
357 unsigned int
358 hb_blob_get_length (hb_blob_t *blob)
359 {
360 return blob->length;
361 }
362
363 /**
364 * hb_blob_get_data:
365 * @blob: a blob.
366 * @length: (out): The length in bytes of the data retrieved
367 *
368 * Fetches the data from a blob.
369 *
370 * Returns: (nullable) (transfer none) (array length=length): the byte data of @blob.
371 *
372 * Since: 0.9.2
373 **/
374 const char *
375 hb_blob_get_data (hb_blob_t *blob, unsigned int *length)
376 {
377 if (length)
378 *length = blob->length;
379
380 return blob->data;
381 }
382
383 /**
384 * hb_blob_get_data_writable:
385 * @blob: a blob.
386 * @length: (out): output length of the writable data.
387 *
388 * Tries to make blob data writable (possibly copying it) and
389 * return pointer to data.
390 *
391 * Fails if blob has been made immutable, or if memory allocation
392 * fails.
393 *
394 * Returns: (transfer none) (array length=length): Writable blob data,
395 * or `NULL` if failed.
396 *
397 * Since: 0.9.2
398 **/
399 char *
400 hb_blob_get_data_writable (hb_blob_t *blob, unsigned int *length)
401 {
402 if (hb_object_is_immutable (blob) ||
403 !blob->try_make_writable ())
404 {
405 if (length) *length = 0;
406 return nullptr;
407 }
408
409 if (length) *length = blob->length;
410 return const_cast<char *> (blob->data);
411 }
412
413
414 bool
415 hb_blob_t::try_make_writable_inplace_unix ()
416 {
417 #if defined(HAVE_SYS_MMAN_H) && defined(HAVE_MPROTECT)
418 uintptr_t pagesize = -1, mask, length;
419 const char *addr;
420
421 #if defined(HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
422 pagesize = (uintptr_t) sysconf (_SC_PAGE_SIZE);
423 #elif defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE)
424 pagesize = (uintptr_t) sysconf (_SC_PAGESIZE);
425 #elif defined(HAVE_GETPAGESIZE)
426 pagesize = (uintptr_t) getpagesize ();
427 #endif
428
429 if ((uintptr_t) -1L == pagesize) {
430 DEBUG_MSG_FUNC (BLOB, this, "failed to get pagesize: %s", strerror (errno));
431 return false;
432 }
433 DEBUG_MSG_FUNC (BLOB, this, "pagesize is %lu", (unsigned long) pagesize);
434
435 mask = ~(pagesize-1);
436 addr = (const char *) (((uintptr_t) this->data) & mask);
437 length = (const char *) (((uintptr_t) this->data + this->length + pagesize-1) & mask) - addr;
438 DEBUG_MSG_FUNC (BLOB, this,
439 "calling mprotect on [%p..%p] (%lu bytes)",
440 addr, addr+length, (unsigned long) length);
441 if (-1 == mprotect ((void *) addr, length, PROT_READ | PROT_WRITE)) {
442 DEBUG_MSG_FUNC (BLOB, this, "mprotect failed: %s", strerror (errno));
443 return false;
444 }
445
446 this->mode = HB_MEMORY_MODE_WRITABLE;
447
448 DEBUG_MSG_FUNC (BLOB, this,
449 "successfully made [%p..%p] (%lu bytes) writable\n",
450 addr, addr+length, (unsigned long) length);
451 return true;
452 #else
453 return false;
454 #endif
455 }
456
457 bool
458 hb_blob_t::try_make_writable_inplace ()
459 {
460 DEBUG_MSG_FUNC (BLOB, this, "making writable inplace\n");
461
462 if (this->try_make_writable_inplace_unix ())
463 return true;
464
465 DEBUG_MSG_FUNC (BLOB, this, "making writable -> FAILED\n");
466
467 /* Failed to make writable inplace, mark that */
468 this->mode = HB_MEMORY_MODE_READONLY;
469 return false;
470 }
471
472 bool
473 hb_blob_t::try_make_writable ()
474 {
475 if (unlikely (!length))
476 mode = HB_MEMORY_MODE_WRITABLE;
477
478 if (this->mode == HB_MEMORY_MODE_WRITABLE)
479 return true;
480
481 if (this->mode == HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE && this->try_make_writable_inplace ())
482 return true;
483
484 if (this->mode == HB_MEMORY_MODE_WRITABLE)
485 return true;
486
487
488 DEBUG_MSG_FUNC (BLOB, this, "current data is -> %p\n", this->data);
489
490 char *new_data;
491
492 new_data = (char *) hb_malloc (this->length);
493 if (unlikely (!new_data))
494 return false;
495
496 DEBUG_MSG_FUNC (BLOB, this, "dupped successfully -> %p\n", this->data);
497
498 hb_memcpy (new_data, this->data, this->length);
499 this->destroy_user_data ();
500 this->mode = HB_MEMORY_MODE_WRITABLE;
501 this->data = new_data;
502 this->user_data = new_data;
503 this->destroy = hb_free;
504
505 return true;
506 }
507
508 /*
509 * Mmap
510 */
511
512 #ifndef HB_NO_OPEN
513 #ifdef HAVE_MMAP
514 # if !defined(HB_NO_RESOURCE_FORK) && defined(__APPLE__)
515 # include <sys/paths.h>
516 # endif
517 # include <sys/types.h>
518 # include <sys/stat.h>
519 # include <fcntl.h>
520 #endif
521
522 #ifdef _WIN32
523 # include <windows.h>
524 #else
525 # ifndef O_BINARY
526 # define O_BINARY 0
527 # endif
528 #endif
529
530 #ifndef MAP_NORESERVE
531 # define MAP_NORESERVE 0
532 #endif
533
534 struct hb_mapped_file_t
535 {
536 char *contents;
537 unsigned long length;
538 #ifdef _WIN32
539 HANDLE mapping;
540 #endif
541 };
542
543 #if (defined(HAVE_MMAP) || defined(_WIN32)) && !defined(HB_NO_MMAP)
544 static void
545 _hb_mapped_file_destroy (void *file_)
546 {
547 hb_mapped_file_t *file = (hb_mapped_file_t *) file_;
548 #ifdef HAVE_MMAP
549 munmap (file->contents, file->length);
550 #elif defined(_WIN32)
551 UnmapViewOfFile (file->contents);
552 CloseHandle (file->mapping);
553 #else
554 assert (0); // If we don't have mmap we shouldn't reach here
555 #endif
556
557 hb_free (file);
558 }
559 #endif
560
561 #ifdef _PATH_RSRCFORKSPEC
562 static int
563 _open_resource_fork (const char *file_name, hb_mapped_file_t *file)
564 {
565 size_t name_len = strlen (file_name);
566 size_t len = name_len + sizeof (_PATH_RSRCFORKSPEC);
567
568 char *rsrc_name = (char *) hb_malloc (len);
569 if (unlikely (!rsrc_name)) return -1;
570
571 strncpy (rsrc_name, file_name, name_len);
572 strncpy (rsrc_name + name_len, _PATH_RSRCFORKSPEC,
573 sizeof (_PATH_RSRCFORKSPEC));
574
575 int fd = open (rsrc_name, O_RDONLY | O_BINARY, 0);
576 hb_free (rsrc_name);
577
578 if (fd != -1)
579 {
580 struct stat st;
581 if (fstat (fd, &st) != -1)
582 file->length = (unsigned long) st.st_size;
583 else
584 {
585 close (fd);
586 fd = -1;
587 }
588 }
589
590 return fd;
591 }
592 #endif
593
594 /**
595 * hb_blob_create_from_file:
596 * @file_name: A font filename
597 *
598 * Creates a new blob containing the data from the
599 * specified binary font file.
600 *
601 * Returns: An #hb_blob_t pointer with the content of the file,
602 * or hb_blob_get_empty() if failed.
603 *
604 * Since: 1.7.7
605 **/
606 hb_blob_t *
607 hb_blob_create_from_file (const char *file_name)
608 {
609 hb_blob_t *blob = hb_blob_create_from_file_or_fail (file_name);
610 return likely (blob) ? blob : hb_blob_get_empty ();
611 }
612
613 /**
614 * hb_blob_create_from_file_or_fail:
615 * @file_name: A font filename
616 *
617 * Creates a new blob containing the data from the
618 * specified binary font file.
619 *
620 * Returns: An #hb_blob_t pointer with the content of the file,
621 * or `NULL` if failed.
622 *
623 * Since: 2.8.2
624 **/
625 hb_blob_t *
626 hb_blob_create_from_file_or_fail (const char *file_name)
627 {
628 /* Adopted from glib's gmappedfile.c with Matthias Clasen and
629 Allison Lortie permission but changed a lot to suit our need. */
630 #if defined(HAVE_MMAP) && !defined(HB_NO_MMAP)
631 hb_mapped_file_t *file = (hb_mapped_file_t *) hb_calloc (1, sizeof (hb_mapped_file_t));
632 if (unlikely (!file)) return nullptr;
633
634 int fd = open (file_name, O_RDONLY | O_BINARY, 0);
635 if (unlikely (fd == -1)) goto fail_without_close;
636
637 struct stat st;
638 if (unlikely (fstat (fd, &st) == -1)) goto fail;
639
640 file->length = (unsigned long) st.st_size;
641
642 #ifdef _PATH_RSRCFORKSPEC
643 if (unlikely (file->length == 0))
644 {
645 int rfd = _open_resource_fork (file_name, file);
646 if (rfd != -1)
647 {
648 close (fd);
649 fd = rfd;
650 }
651 }
652 #endif
653
654 file->contents = (char *) mmap (nullptr, file->length, PROT_READ,
655 MAP_PRIVATE | MAP_NORESERVE, fd, 0);
656
657 if (unlikely (file->contents == MAP_FAILED)) goto fail;
658
659 close (fd);
660
661 return hb_blob_create_or_fail (file->contents, file->length,
662 HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE, (void *) file,
663 (hb_destroy_func_t) _hb_mapped_file_destroy);
664
665 fail:
666 close (fd);
667 fail_without_close:
668 hb_free (file);
669
670 #elif defined(_WIN32) && !defined(HB_NO_MMAP)
671 hb_mapped_file_t *file = (hb_mapped_file_t *) hb_calloc (1, sizeof (hb_mapped_file_t));
672 if (unlikely (!file)) return nullptr;
673
674 HANDLE fd;
675 unsigned int size = strlen (file_name) + 1;
676 wchar_t * wchar_file_name = (wchar_t *) hb_malloc (sizeof (wchar_t) * size);
677 if (unlikely (!wchar_file_name)) goto fail_without_close;
678 mbstowcs (wchar_file_name, file_name, size);
679 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
680 {
681 CREATEFILE2_EXTENDED_PARAMETERS ceparams = { 0 };
682 ceparams.dwSize = sizeof(CREATEFILE2_EXTENDED_PARAMETERS);
683 ceparams.dwFileAttributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED & 0xFFFF;
684 ceparams.dwFileFlags = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED & 0xFFF00000;
685 ceparams.dwSecurityQosFlags = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED & 0x000F0000;
686 ceparams.lpSecurityAttributes = nullptr;
687 ceparams.hTemplateFile = nullptr;
688 fd = CreateFile2 (wchar_file_name, GENERIC_READ, FILE_SHARE_READ,
689 OPEN_EXISTING, &ceparams);
690 }
691 #else
692 fd = CreateFileW (wchar_file_name, GENERIC_READ, FILE_SHARE_READ, nullptr,
693 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED,
694 nullptr);
695 #endif
696 hb_free (wchar_file_name);
697
698 if (unlikely (fd == INVALID_HANDLE_VALUE)) goto fail_without_close;
699
700 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
701 {
702 LARGE_INTEGER length;
703 GetFileSizeEx (fd, &length);
704 file->length = length.LowPart;
705 file->mapping = CreateFileMappingFromApp (fd, nullptr, PAGE_READONLY, length.QuadPart, nullptr);
706 }
707 #else
708 file->length = (unsigned long) GetFileSize (fd, nullptr);
709 file->mapping = CreateFileMapping (fd, nullptr, PAGE_READONLY, 0, 0, nullptr);
710 #endif
711 if (unlikely (!file->mapping)) goto fail;
712
713 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
714 file->contents = (char *) MapViewOfFileFromApp (file->mapping, FILE_MAP_READ, 0, 0);
715 #else
716 file->contents = (char *) MapViewOfFile (file->mapping, FILE_MAP_READ, 0, 0, 0);
717 #endif
718 if (unlikely (!file->contents)) goto fail;
719
720 CloseHandle (fd);
721 return hb_blob_create_or_fail (file->contents, file->length,
722 HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE, (void *) file,
723 (hb_destroy_func_t) _hb_mapped_file_destroy);
724
725 fail:
726 CloseHandle (fd);
727 fail_without_close:
728 hb_free (file);
729
730 #endif
731
732 /* The following tries to read a file without knowing its size beforehand
733 It's used as a fallback for systems without mmap or to read from pipes */
734 unsigned long len = 0, allocated = BUFSIZ * 16;
735 char *data = (char *) hb_malloc (allocated);
736 if (unlikely (!data)) return nullptr;
737
738 FILE *fp = fopen (file_name, "rb");
739 if (unlikely (!fp)) goto fread_fail_without_close;
740
741 while (!feof (fp))
742 {
743 if (allocated - len < BUFSIZ)
744 {
745 allocated *= 2;
746 /* Don't allocate and go more than ~536MB, our mmap reader still
747 can cover files like that but lets limit our fallback reader */
748 if (unlikely (allocated > (2 << 28))) goto fread_fail;
749 char *new_data = (char *) hb_realloc (data, allocated);
750 if (unlikely (!new_data)) goto fread_fail;
751 data = new_data;
752 }
753
754 unsigned long addition = fread (data + len, 1, allocated - len, fp);
755
756 int err = ferror (fp);
757 #ifdef EINTR // armcc doesn't have it
758 if (unlikely (err == EINTR)) continue;
759 #endif
760 if (unlikely (err)) goto fread_fail;
761
762 len += addition;
763 }
764 fclose (fp);
765
766 return hb_blob_create_or_fail (data, len, HB_MEMORY_MODE_WRITABLE, data,
767 (hb_destroy_func_t) hb_free);
768
769 fread_fail:
770 fclose (fp);
771 fread_fail_without_close:
772 hb_free (data);
773 return nullptr;
774 }
775 #endif /* !HB_NO_OPEN */