1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001,2002 Josh Coalson
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
20 #if !defined _MSC_VER && !defined __MINGW32__
21 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
28 #if defined _MSC_VER || defined __MINGW32__
29 #include <sys/utime.h> /* for utime() */
30 #include <io.h> /* for chmod() */
32 #include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */
33 #include <utime.h> /* for utime() */
34 #include <unistd.h> /* for chown(), unlink() */
36 #include <sys/stat.h> /* for stat(), maybe chmod() */
38 #include "private/metadata.h"
40 #include "FLAC/assert.h"
41 #include "FLAC/file_decoder.h"
46 #define max(a,b) ((a)>(b)?(a):(b))
50 #define min(a,b) ((a)<(b)?(a):(b))
53 /****************************************************************************
55 * Local function declarations
57 ***************************************************************************/
59 static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
60 static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
61 static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes);
62 static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes);
63 static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes);
64 static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes);
66 static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator);
67 static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block);
68 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_(FILE *file, FLAC__StreamMetadata_StreamInfo *block);
69 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_(FILE *file, FLAC__StreamMetadata_Padding *block, unsigned block_length);
70 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_(FILE *file, FLAC__StreamMetadata_Application *block, unsigned block_length);
71 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_(FILE *file, FLAC__StreamMetadata_SeekTable *block, unsigned block_length);
72 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_(FILE *file, FLAC__StreamMetadata_VorbisComment_Entry *entry);
73 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_(FILE *file, FLAC__StreamMetadata_VorbisComment *block);
74 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_(FILE *file, FLAC__StreamMetadata_CueSheet_Track *track);
75 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_(FILE *file, FLAC__StreamMetadata_CueSheet *block);
77 static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
78 static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
79 static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_streaminfo_(FILE *file, const FLAC__StreamMetadata_StreamInfo *block);
80 static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_padding_(FILE *file, const FLAC__StreamMetadata_Padding *block, unsigned block_length);
81 static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_application_(FILE *file, const FLAC__StreamMetadata_Application *block, unsigned block_length);
82 static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_seektable_(FILE *file, const FLAC__StreamMetadata_SeekTable *block);
83 static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_vorbis_comment_(FILE *file, const FLAC__StreamMetadata_VorbisComment *block);
84 static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_cuesheet_(FILE *file, const FLAC__StreamMetadata_CueSheet *block);
85 static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block);
86 static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last);
87 static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append);
89 static FLAC__bool chain_rewrite_chain_(FLAC__Metadata_Chain *chain);
90 static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix);
92 static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator);
93 static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator);
95 /* return 0 if OK, 1 if read error, 2 if not a FLAC file */
96 static unsigned seek_to_first_metadata_block_(FILE *f);
98 static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append);
99 static FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, long fixup_is_last_flag_offset, FLAC__bool backup);
101 static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, unsigned bytes/*@@@ 4G limit*/, FLAC__Metadata_SimpleIteratorStatus *status);
102 static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status);
104 static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
105 static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
106 static void cleanup_tempfile_(FILE **tempfile, char **tempfilename);
108 static FLAC__bool get_file_stats_(const char *filename, struct stat *stats);
109 static void set_file_stats_(const char *filename, struct stat *stats);
111 static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status);
114 /****************************************************************************
116 * Level 0 implementation
118 ***************************************************************************/
120 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
121 static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
122 static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
125 FLAC__bool got_error;
126 FLAC__bool got_streaminfo;
127 FLAC__StreamMetadata *streaminfo;
128 } level0_client_data;
130 FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
132 level0_client_data cd;
133 FLAC__FileDecoder *decoder;
135 FLAC__ASSERT(0 != filename);
136 FLAC__ASSERT(0 != streaminfo);
138 decoder = FLAC__file_decoder_new();
143 cd.got_error = false;
144 cd.got_streaminfo = false;
145 cd.streaminfo = streaminfo;
147 FLAC__file_decoder_set_md5_checking(decoder, false);
148 FLAC__file_decoder_set_filename(decoder, filename);
149 FLAC__file_decoder_set_metadata_ignore_all(decoder);
150 FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_STREAMINFO);
151 FLAC__file_decoder_set_write_callback(decoder, write_callback_);
152 FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_);
153 FLAC__file_decoder_set_error_callback(decoder, error_callback_);
154 FLAC__file_decoder_set_client_data(decoder, &cd);
156 if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK || cd.got_error) {
157 FLAC__file_decoder_finish(decoder);
158 FLAC__file_decoder_delete(decoder);
162 /* the first thing decoded must be the STREAMINFO block: */
163 if(!FLAC__file_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
164 FLAC__file_decoder_finish(decoder);
165 FLAC__file_decoder_delete(decoder);
169 FLAC__file_decoder_finish(decoder);
170 FLAC__file_decoder_delete(decoder);
172 return !cd.got_error && cd.got_streaminfo;
175 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
177 (void)decoder, (void)frame, (void)buffer, (void)client_data;
179 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
182 void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
184 level0_client_data *cd = (level0_client_data *)client_data;
187 if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO && 0 != cd->streaminfo) {
188 *(cd->streaminfo) = *metadata;
189 cd->got_streaminfo = true;
193 void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
195 level0_client_data *cd = (level0_client_data *)client_data;
198 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
199 cd->got_error = true;
203 /****************************************************************************
205 * Level 1 implementation
207 ***************************************************************************/
209 #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4)
210 /* 1 for initial offset, +4 for our own personal use */
212 struct FLAC__Metadata_SimpleIterator {
214 char *filename, *tempfile_path_prefix;
216 FLAC__bool has_stats;
217 FLAC__bool is_writable;
218 FLAC__Metadata_SimpleIteratorStatus status;
219 /*@@@ 2G limits here because of the offset type: */
220 long offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH];
221 long first_offset; /* this is the offset to the STREAMINFO block */
223 /* this is the metadata block header of the current block we are pointing to: */
225 FLAC__MetadataType type;
229 FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = {
230 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK",
231 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT",
232 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE",
233 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE",
234 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE",
235 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA",
236 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR",
237 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR",
238 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR",
239 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR",
240 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR",
241 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR",
242 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR"
246 FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new()
248 FLAC__Metadata_SimpleIterator *iterator = (FLAC__Metadata_SimpleIterator*)calloc(1, sizeof(FLAC__Metadata_SimpleIterator));
252 iterator->filename = 0;
253 iterator->tempfile_path_prefix = 0;
254 iterator->has_stats = false;
255 iterator->is_writable = false;
256 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
257 iterator->first_offset = iterator->offset[0] = -1;
264 static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator)
266 FLAC__ASSERT(0 != iterator);
268 if(0 != iterator->file) {
269 fclose(iterator->file);
271 if(iterator->has_stats)
272 set_file_stats_(iterator->filename, &iterator->stats);
274 if(0 != iterator->filename) {
275 free(iterator->filename);
276 iterator->filename = 0;
278 if(0 != iterator->tempfile_path_prefix) {
279 free(iterator->tempfile_path_prefix);
280 iterator->tempfile_path_prefix = 0;
284 FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator)
286 FLAC__ASSERT(0 != iterator);
288 simple_iterator_free_guts_(iterator);
292 FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator)
294 FLAC__Metadata_SimpleIteratorStatus status;
296 FLAC__ASSERT(0 != iterator);
298 status = iterator->status;
299 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
303 static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only)
307 FLAC__ASSERT(0 != iterator);
309 if(read_only || 0 == (iterator->file = fopen(iterator->filename, "r+b"))) {
310 iterator->is_writable = false;
311 #if !defined _MSC_VER && !defined __MINGW32__
312 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
313 if(read_only || errno == EACCES) {
315 if(0 == (iterator->file = fopen(iterator->filename, "rb"))) {
316 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
319 #if !defined _MSC_VER && !defined __MINGW32__
322 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
328 iterator->is_writable = true;
331 ret = seek_to_first_metadata_block_(iterator->file);
335 iterator->first_offset = iterator->offset[iterator->depth] = ftell(iterator->file);
336 return read_metadata_block_header_(iterator);
338 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
341 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE;
350 @@@ If we decide to finish implementing this, put this comment back in metadata.h
352 * The 'tempfile_path_prefix' allows you to specify a directory where
353 * tempfiles should go. Remember that if your metadata edits cause the
354 * FLAC file to grow, the entire file will have to be rewritten. If
355 * 'tempfile_path_prefix' is NULL, the temp file will be written in the
356 * same directory as the original FLAC file. This makes replacing the
357 * original with the tempfile fast but requires extra space in the same
358 * partition for the tempfile. If space is a problem, you can pass a
359 * directory name belonging to a different partition in
360 * 'tempfile_path_prefix'. Note that you should use the forward slash
361 * '/' as the directory separator. A trailing slash is not needed; it
362 * will be added automatically.
364 FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix);
367 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool read_only, FLAC__bool preserve_file_stats)
369 const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'rename(...)' for what it will take to finish implementing this */
371 FLAC__ASSERT(0 != iterator);
372 FLAC__ASSERT(0 != filename);
374 simple_iterator_free_guts_(iterator);
376 if(!read_only && preserve_file_stats)
377 iterator->has_stats = get_file_stats_(filename, &iterator->stats);
379 if(0 == (iterator->filename = strdup(filename))) {
380 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
383 if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) {
384 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
388 return simple_iterator_prime_input_(iterator, read_only);
391 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator)
393 FLAC__ASSERT(0 != iterator);
394 FLAC__ASSERT(0 != iterator->file);
396 return iterator->is_writable;
399 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator)
401 FLAC__ASSERT(0 != iterator);
402 FLAC__ASSERT(0 != iterator->file);
404 if(iterator->is_last)
407 if(0 != fseek(iterator->file, iterator->length, SEEK_CUR)) {
408 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
412 iterator->offset[iterator->depth] = ftell(iterator->file);
414 return read_metadata_block_header_(iterator);
417 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator)
421 FLAC__ASSERT(0 != iterator);
422 FLAC__ASSERT(0 != iterator->file);
424 if(iterator->offset[iterator->depth] == iterator->first_offset)
427 if(0 != fseek(iterator->file, iterator->first_offset, SEEK_SET)) {
428 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
431 this_offset = iterator->first_offset;
432 if(!read_metadata_block_header_(iterator))
435 /* we ignore any error from ftell() and catch it in fseek() */
436 while(ftell(iterator->file) + (long)iterator->length < iterator->offset[iterator->depth]) {
437 if(0 != fseek(iterator->file, iterator->length, SEEK_CUR)) {
438 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
441 this_offset = ftell(iterator->file);
442 if(!read_metadata_block_header_(iterator))
446 iterator->offset[iterator->depth] = this_offset;
451 FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator)
453 FLAC__ASSERT(0 != iterator);
454 FLAC__ASSERT(0 != iterator->file);
456 return iterator->type;
459 FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
461 FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);
463 FLAC__ASSERT(0 != iterator);
464 FLAC__ASSERT(0 != iterator->file);
467 block->is_last = iterator->is_last;
468 block->length = iterator->length;
470 if(!read_metadata_block_data_(iterator, block)) {
471 FLAC__metadata_object_delete(block);
475 /* back up to the beginning of the block data to stay consistent */
476 if(0 != fseek(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) {
477 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
478 FLAC__metadata_object_delete(block);
483 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
488 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
490 FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth];)
493 FLAC__ASSERT(0 != iterator);
494 FLAC__ASSERT(0 != iterator->file);
495 FLAC__ASSERT(0 != block);
497 if(!iterator->is_writable) {
498 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
502 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) {
503 if(iterator->type != block->type) {
504 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
509 block->is_last = iterator->is_last;
511 if(iterator->length == block->length)
512 return write_metadata_block_stationary_(iterator, block);
513 else if(iterator->length > block->length) {
514 if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) {
515 ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last);
516 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
517 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
521 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
522 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
523 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
527 else /* iterator->length < block->length */ {
528 unsigned padding_leftover = 0;
529 FLAC__bool padding_is_last = false;
531 /* first see if we can even use padding */
532 if(iterator->is_last) {
536 const unsigned extra_padding_bytes_required = block->length - iterator->length;
537 simple_iterator_push_(iterator);
538 if(!FLAC__metadata_simple_iterator_next(iterator)) {
539 (void)simple_iterator_pop_(iterator);
542 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
546 if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) {
547 padding_leftover = 0;
548 block->is_last = iterator->is_last;
550 else if(iterator->length < extra_padding_bytes_required)
553 padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required;
554 padding_is_last = iterator->is_last;
555 block->is_last = false;
558 if(!simple_iterator_pop_(iterator))
563 if(padding_leftover == 0) {
564 ret = write_metadata_block_stationary_(iterator, block);
565 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
566 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
570 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
571 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
572 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
573 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
578 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
579 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
580 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
586 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
588 unsigned padding_leftover = 0;
589 FLAC__bool padding_is_last = false;
591 FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;)
594 FLAC__ASSERT(0 != iterator);
595 FLAC__ASSERT(0 != iterator->file);
596 FLAC__ASSERT(0 != block);
598 if(!iterator->is_writable)
601 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
602 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
606 block->is_last = iterator->is_last;
609 /* first see if we can even use padding */
610 if(iterator->is_last) {
614 simple_iterator_push_(iterator);
615 if(!FLAC__metadata_simple_iterator_next(iterator)) {
616 (void)simple_iterator_pop_(iterator);
619 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
623 if(iterator->length == block->length) {
624 padding_leftover = 0;
625 block->is_last = iterator->is_last;
627 else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length)
630 padding_leftover = iterator->length - block->length;
631 padding_is_last = iterator->is_last;
632 block->is_last = false;
635 if(!simple_iterator_pop_(iterator))
640 /* move to the next block, which is suitable padding */
641 if(!FLAC__metadata_simple_iterator_next(iterator))
643 if(padding_leftover == 0) {
644 ret = write_metadata_block_stationary_(iterator, block);
645 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
646 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
650 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
651 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
652 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
653 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
658 ret = rewrite_whole_file_(iterator, block, /*append=*/true);
659 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
660 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
665 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding)
667 FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth];)
670 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) {
671 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
676 FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
678 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
681 padding->length = iterator->length;
682 if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) {
683 FLAC__metadata_object_delete(padding);
686 FLAC__metadata_object_delete(padding);
687 if(!FLAC__metadata_simple_iterator_prev(iterator))
689 FLAC__ASSERT(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length == debug_target_offset);
690 FLAC__ASSERT(ftell(iterator->file) + (long)iterator->length == debug_target_offset);
694 ret = rewrite_whole_file_(iterator, 0, /*append=*/false);
695 FLAC__ASSERT(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length == debug_target_offset);
696 FLAC__ASSERT(ftell(iterator->file) + (long)iterator->length == debug_target_offset);
703 /****************************************************************************
705 * Level 2 implementation
707 ***************************************************************************/
710 typedef struct FLAC__Metadata_Node {
711 FLAC__StreamMetadata *data;
712 struct FLAC__Metadata_Node *prev, *next;
713 } FLAC__Metadata_Node;
715 struct FLAC__Metadata_Chain {
717 FLAC__Metadata_Node *head;
718 FLAC__Metadata_Node *tail;
720 FLAC__Metadata_ChainStatus status;
721 long first_offset, last_offset; /*@@@ 2G limit */
723 * This is the length of the chain initially read from the FLAC file.
724 * it is used to compare against the current length to decide whether
725 * or not the whole file has to be rewritten.
727 unsigned initial_length; /*@@@ 4G limit */
730 struct FLAC__Metadata_Iterator {
731 FLAC__Metadata_Chain *chain;
732 FLAC__Metadata_Node *current;
735 FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = {
736 "FLAC__METADATA_CHAIN_STATUS_OK",
737 "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT",
738 "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE",
739 "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE",
740 "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE",
741 "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA",
742 "FLAC__METADATA_CHAIN_STATUS_READ_ERROR",
743 "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR",
744 "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR",
745 "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR",
746 "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR",
747 "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR",
748 "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR"
752 static FLAC__Metadata_Node *node_new_()
754 return (FLAC__Metadata_Node*)calloc(1, sizeof(FLAC__Metadata_Node));
757 static void node_delete_(FLAC__Metadata_Node *node)
759 FLAC__ASSERT(0 != node);
761 FLAC__metadata_object_delete(node->data);
765 static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
767 FLAC__ASSERT(0 != chain);
768 FLAC__ASSERT(0 != node);
769 FLAC__ASSERT(0 != node->data);
771 node->next = node->prev = 0;
772 node->data->is_last = true;
774 chain->tail->data->is_last = false;
779 FLAC__ASSERT(0 != chain->tail);
780 chain->tail->next = node;
781 node->prev = chain->tail;
787 static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
789 FLAC__ASSERT(0 != chain);
790 FLAC__ASSERT(0 != node);
792 if(node == chain->head)
793 chain->head = node->next;
795 node->prev->next = node->next;
797 if(node == chain->tail)
798 chain->tail = node->prev;
800 node->next->prev = node->prev;
803 chain->tail->data->is_last = true;
808 static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
810 chain_remove_node_(chain, node);
814 static unsigned chain_calculate_length_(FLAC__Metadata_Chain *chain)
816 const FLAC__Metadata_Node *node;
818 for(node = chain->head; node; node = node->next)
819 length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
823 static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
825 FLAC__ASSERT(0 != node);
826 FLAC__ASSERT(0 != node->data);
827 FLAC__ASSERT(0 != iterator);
828 FLAC__ASSERT(0 != iterator->current);
829 FLAC__ASSERT(0 != iterator->chain);
830 FLAC__ASSERT(0 != iterator->chain->head);
831 FLAC__ASSERT(0 != iterator->chain->tail);
833 node->data->is_last = false;
835 node->prev = iterator->current->prev;
836 node->next = iterator->current;
839 iterator->chain->head = node;
841 node->prev->next = node;
843 iterator->current->prev = node;
845 iterator->chain->nodes++;
848 static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
850 FLAC__ASSERT(0 != node);
851 FLAC__ASSERT(0 != node->data);
852 FLAC__ASSERT(0 != iterator);
853 FLAC__ASSERT(0 != iterator->current);
854 FLAC__ASSERT(0 != iterator->chain);
855 FLAC__ASSERT(0 != iterator->chain->head);
856 FLAC__ASSERT(0 != iterator->chain->tail);
858 iterator->current->data->is_last = false;
860 node->prev = iterator->current;
861 node->next = iterator->current->next;
864 iterator->chain->tail = node;
866 node->next->prev = node;
868 node->prev->next = node;
870 iterator->chain->tail->data->is_last = true;
872 iterator->chain->nodes++;
875 /* return true iff node and node->next are both padding */
876 static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
878 if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) {
879 const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length;
880 node->data->length += growth;
882 chain_delete_node_(chain, node->next);
889 FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new()
891 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)calloc(1, sizeof(FLAC__Metadata_Chain));
895 chain->head = chain->tail = 0;
897 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
898 chain->initial_length = 0;
904 FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain)
906 FLAC__Metadata_Node *node, *next;
908 FLAC__ASSERT(0 != chain);
910 for(node = chain->head; node; ) {
916 if(0 != chain->filename)
917 free(chain->filename);
922 FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain)
924 FLAC__Metadata_ChainStatus status;
926 FLAC__ASSERT(0 != chain);
928 status = chain->status;
929 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
933 FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename)
935 FLAC__Metadata_SimpleIterator *iterator;
936 FLAC__Metadata_Node *node;
938 FLAC__ASSERT(0 != chain);
939 FLAC__ASSERT(0 != filename);
941 if(0 == (chain->filename = strdup(filename))) {
942 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
946 if(0 == (iterator = FLAC__metadata_simple_iterator_new())) {
947 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
951 if(!FLAC__metadata_simple_iterator_init(iterator, filename, /*read_only=*/true, /*preserve_file_stats=*/false)) {
952 chain->status = get_equivalent_status_(iterator->status);
956 chain->first_offset = iterator->offset[iterator->depth];
961 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
964 node->data = FLAC__metadata_simple_iterator_get_block(iterator);
965 if(0 == node->data) {
967 chain->status = get_equivalent_status_(iterator->status);
970 chain_append_node_(chain, node);
971 } while(FLAC__metadata_simple_iterator_next(iterator));
973 if(!iterator->is_last || iterator->status != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK) {
974 chain->status = get_equivalent_status_(iterator->status);
978 chain->last_offset = ftell(iterator->file) + iterator->length;
979 FLAC__metadata_simple_iterator_delete(iterator);
981 chain->initial_length = chain_calculate_length_(chain);
985 FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats)
988 const char *tempfile_path_prefix = 0;
989 unsigned current_length;
991 FLAC__ASSERT(0 != chain);
993 current_length = chain_calculate_length_(chain);
996 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
997 const unsigned delta = chain->initial_length - current_length;
998 chain->tail->data->length += delta;
999 current_length += delta;
1000 FLAC__ASSERT(current_length == chain->initial_length);
1002 else if(current_length + FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1003 FLAC__StreamMetadata *padding;
1004 FLAC__Metadata_Node *node;
1005 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) {
1006 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1009 padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length);
1010 if(0 == (node = node_new_())) {
1011 FLAC__metadata_object_delete(padding);
1012 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1015 node->data = padding;
1016 chain_append_node_(chain, node);
1017 current_length = chain_calculate_length_(chain);
1018 FLAC__ASSERT(current_length == chain->initial_length);
1020 else if(current_length > chain->initial_length) {
1021 const unsigned delta = current_length - chain->initial_length;
1022 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1023 if(chain->tail->data->length + FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1024 chain_delete_node_(chain, chain->tail);
1025 current_length = chain_calculate_length_(chain);
1026 FLAC__ASSERT(current_length == chain->initial_length);
1028 else if(chain->tail->data->length >= delta) {
1029 chain->tail->data->length -= delta;
1030 current_length -= delta;
1031 FLAC__ASSERT(current_length == chain->initial_length);
1037 if(preserve_file_stats)
1038 get_file_stats_(chain->filename, &stats);
1040 if(current_length == chain->initial_length) {
1041 if(!chain_rewrite_chain_(chain))
1045 if(!chain_rewrite_file_(chain, tempfile_path_prefix))
1049 if(preserve_file_stats)
1050 set_file_stats_(chain->filename, &stats);
1052 /* recompute lengths and offsets if necessary */
1053 if(chain->initial_length != current_length) {
1054 const FLAC__Metadata_Node *node;
1055 chain->initial_length = current_length;
1056 chain->last_offset = chain->first_offset;
1057 for(node = chain->head; node; node = node->next)
1058 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1064 FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain)
1066 FLAC__Metadata_Node *node;
1068 FLAC__ASSERT(0 != chain);
1070 for(node = chain->head; node; ) {
1071 if(!chain_merge_adjacent_padding_(chain, node))
1076 FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain)
1078 FLAC__Metadata_Node *node, *save;
1081 FLAC__ASSERT(0 != chain);
1084 * Don't try and be too smart... this simple algo is good enough for
1085 * the small number of nodes that we deal with.
1087 for(i = 0, node = chain->head; i < chain->nodes; i++) {
1088 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1090 chain_remove_node_(chain, node);
1091 chain_append_node_(chain, node);
1099 FLAC__metadata_chain_merge_padding(chain);
1103 FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new()
1105 FLAC__Metadata_Iterator *iterator = (FLAC__Metadata_Iterator*)calloc(1, sizeof(FLAC__Metadata_Iterator));
1107 /* calloc() implies:
1108 iterator->current = 0;
1109 iterator->chain = 0;
1115 FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator)
1117 FLAC__ASSERT(0 != iterator);
1122 FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain)
1124 FLAC__ASSERT(0 != iterator);
1125 FLAC__ASSERT(0 != chain);
1126 FLAC__ASSERT(0 != chain->head);
1128 iterator->chain = chain;
1129 iterator->current = chain->head;
1132 FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator)
1134 FLAC__ASSERT(0 != iterator);
1136 if(0 == iterator->current || 0 == iterator->current->next)
1139 iterator->current = iterator->current->next;
1143 FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator)
1145 FLAC__ASSERT(0 != iterator);
1147 if(0 == iterator->current || 0 == iterator->current->prev)
1150 iterator->current = iterator->current->prev;
1154 FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator)
1156 FLAC__ASSERT(0 != iterator);
1157 FLAC__ASSERT(0 != iterator->current);
1158 FLAC__ASSERT(0 != iterator->current->data);
1160 return iterator->current->data->type;
1163 FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator)
1165 FLAC__ASSERT(0 != iterator);
1166 FLAC__ASSERT(0 != iterator->current);
1168 return iterator->current->data;
1171 FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1173 FLAC__ASSERT(0 != iterator);
1174 FLAC__ASSERT(0 != block);
1175 return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block);
1178 FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding)
1180 FLAC__Metadata_Node *save;
1182 FLAC__ASSERT(0 != iterator);
1183 FLAC__ASSERT(0 != iterator->current);
1185 if(0 == iterator->current->prev) {
1186 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1190 save = iterator->current->prev;
1192 if(replace_with_padding) {
1193 FLAC__metadata_object_delete_data(iterator->current->data);
1194 iterator->current->data->type = FLAC__METADATA_TYPE_PADDING;
1197 chain_delete_node_(iterator->chain, iterator->current);
1200 iterator->current = save;
1204 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1206 FLAC__Metadata_Node *node;
1208 FLAC__ASSERT(0 != iterator);
1209 FLAC__ASSERT(0 != iterator->current);
1210 FLAC__ASSERT(0 != block);
1212 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1215 if(0 == iterator->current->prev) {
1216 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1220 if(0 == (node = node_new_()))
1224 iterator_insert_node_(iterator, node);
1225 iterator->current = node;
1229 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1231 FLAC__Metadata_Node *node;
1233 FLAC__ASSERT(0 != iterator);
1234 FLAC__ASSERT(0 != iterator->current);
1235 FLAC__ASSERT(0 != block);
1237 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1240 if(0 == (node = node_new_()))
1244 iterator_insert_node_after_(iterator, node);
1245 iterator->current = node;
1250 /****************************************************************************
1252 * Local function definitions
1254 ***************************************************************************/
1256 void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1262 for(i = 0; i < bytes; i++) {
1263 *(--b) = (FLAC__byte)(val & 0xff);
1268 void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1272 for(i = 0; i < bytes; i++) {
1273 *(b++) = (FLAC__byte)(val & 0xff);
1278 void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes)
1284 for(i = 0; i < bytes; i++) {
1285 *(--b) = (FLAC__byte)(val & 0xff);
1290 FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes)
1292 FLAC__uint32 ret = 0;
1295 for(i = 0; i < bytes; i++)
1296 ret = (ret << 8) | (FLAC__uint32)(*b++);
1301 FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes)
1303 FLAC__uint32 ret = 0;
1308 for(i = 0; i < bytes; i++)
1309 ret = (ret << 8) | (FLAC__uint32)(*--b);
1314 FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes)
1316 FLAC__uint64 ret = 0;
1319 for(i = 0; i < bytes; i++)
1320 ret = (ret << 8) | (FLAC__uint64)(*b++);
1325 FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator)
1327 FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH];
1329 FLAC__ASSERT(0 != iterator);
1330 FLAC__ASSERT(0 != iterator->file);
1332 if(fread(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, iterator->file) != FLAC__STREAM_METADATA_HEADER_LENGTH) {
1333 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1337 iterator->is_last = raw_header[0] & 0x80? true : false;
1338 iterator->type = (FLAC__MetadataType)(raw_header[0] & 0x7f);
1339 iterator->length = unpack_uint32_(raw_header + 1, 3);
1341 /* do some checking */
1342 if(iterator->type >= FLAC__METADATA_TYPE_UNDEFINED) {
1343 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA;
1350 FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block)
1352 FLAC__ASSERT(0 != iterator);
1353 FLAC__ASSERT(0 != iterator->file);
1355 switch(block->type) {
1356 case FLAC__METADATA_TYPE_STREAMINFO:
1357 iterator->status = read_metadata_block_data_streaminfo_(iterator->file, &block->data.stream_info);
1359 case FLAC__METADATA_TYPE_PADDING:
1360 iterator->status = read_metadata_block_data_padding_(iterator->file, &block->data.padding, block->length);
1362 case FLAC__METADATA_TYPE_APPLICATION:
1363 iterator->status = read_metadata_block_data_application_(iterator->file, &block->data.application, block->length);
1365 case FLAC__METADATA_TYPE_SEEKTABLE:
1366 iterator->status = read_metadata_block_data_seektable_(iterator->file, &block->data.seek_table, block->length);
1368 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
1369 iterator->status = read_metadata_block_data_vorbis_comment_(iterator->file, &block->data.vorbis_comment);
1371 case FLAC__METADATA_TYPE_CUESHEET:
1372 iterator->status = read_metadata_block_data_cuesheet_(iterator->file, &block->data.cue_sheet);
1376 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR;
1379 return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
1382 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_(FILE *file, FLAC__StreamMetadata_StreamInfo *block)
1384 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b;
1386 FLAC__ASSERT(0 != file);
1388 if(fread(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, file) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
1389 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1393 /* @@@ we are using hardcoded numbers for simplicity but we should
1394 * probably eventually write a bit-level unpacker and use the
1395 * _STREAMINFO_ constants.
1397 block->min_blocksize = unpack_uint32_(b, 2); b += 2;
1398 block->max_blocksize = unpack_uint32_(b, 2); b += 2;
1399 block->min_framesize = unpack_uint32_(b, 3); b += 3;
1400 block->max_framesize = unpack_uint32_(b, 3); b += 3;
1401 block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
1402 block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
1403 block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
1404 block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4);
1405 memcpy(block->md5sum, b+8, 16);
1407 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1411 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_(FILE *file, FLAC__StreamMetadata_Padding *block, unsigned block_length)
1413 FLAC__ASSERT(0 != file);
1415 (void)block; /* nothing to do; we don't care about reading the padding bytes */
1417 if(0 != fseek(file, block_length, SEEK_CUR))
1418 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1420 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1423 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_(FILE *file, FLAC__StreamMetadata_Application *block, unsigned block_length)
1425 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
1427 FLAC__ASSERT(0 != file);
1429 if(fread(block->id, 1, id_bytes, file) != id_bytes)
1430 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1432 block_length -= id_bytes;
1434 if(block_length == 0) {
1438 if(0 == (block->data = (FLAC__byte*)malloc(block_length)))
1439 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1441 if(fread(block->data, 1, block_length, file) != block_length)
1442 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1445 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1448 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_(FILE *file, FLAC__StreamMetadata_SeekTable *block, unsigned block_length)
1451 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
1453 FLAC__ASSERT(0 != file);
1454 FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0);
1456 block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
1458 if(block->num_points == 0)
1460 else if(0 == (block->points = (FLAC__StreamMetadata_SeekPoint*)malloc(block->num_points * sizeof(FLAC__StreamMetadata_SeekPoint))))
1461 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1463 for(i = 0; i < block->num_points; i++) {
1464 if(fread(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, file) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
1465 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1466 /*@@@ some MAGIC NUMBERs here */
1467 block->points[i].sample_number = unpack_uint64_(buffer, 8);
1468 block->points[i].stream_offset = unpack_uint64_(buffer+8, 8);
1469 block->points[i].frame_samples = unpack_uint32_(buffer+16, 2);
1472 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1475 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_(FILE *file, FLAC__StreamMetadata_VorbisComment_Entry *entry)
1477 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
1478 FLAC__byte buffer[4]; /* magic number is asserted below */
1480 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == 4);
1481 FLAC__ASSERT(0 != file);
1483 if(fread(buffer, 1, entry_length_len, file) != entry_length_len)
1484 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1485 entry->length = unpack_uint32_little_endian_(buffer, entry_length_len);
1487 if(0 != entry->entry)
1490 if(entry->length == 0) {
1494 if(0 == (entry->entry = (FLAC__byte*)malloc(entry->length)))
1495 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1497 if(fread(entry->entry, 1, entry->length, file) != entry->length)
1498 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1501 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1504 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_(FILE *file, FLAC__StreamMetadata_VorbisComment *block)
1507 FLAC__Metadata_SimpleIteratorStatus status;
1508 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
1509 FLAC__byte buffer[4]; /* magic number is asserted below */
1511 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == 4);
1512 FLAC__ASSERT(0 != file);
1514 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_(file, &(block->vendor_string))))
1517 if(fread(buffer, 1, num_comments_len, file) != num_comments_len)
1518 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1519 block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len);
1521 if(block->num_comments == 0) {
1522 block->comments = 0;
1524 else if(0 == (block->comments = (FLAC__StreamMetadata_VorbisComment_Entry*)calloc(block->num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry))))
1525 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1527 for(i = 0; i < block->num_comments; i++) {
1528 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_(file, block->comments + i)))
1532 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1535 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_(FILE *file, FLAC__StreamMetadata_CueSheet_Track *track)
1538 FLAC__byte buffer[32]; /* asserted below that this is big enough */
1540 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
1541 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
1542 FLAC__ASSERT(sizeof(buffer) >= (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8);
1544 FLAC__ASSERT(0 != file);
1546 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
1547 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
1548 if(fread(buffer, 1, len, file) != len)
1549 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1550 track->offset = unpack_uint64_(buffer, len);
1552 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
1553 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
1554 if(fread(buffer, 1, len, file) != len)
1555 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1556 track->number = (FLAC__byte)unpack_uint32_(buffer, len);
1558 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
1559 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
1560 if(fread(track->isrc, 1, len, file) != len)
1561 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1563 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) % 8 == 0);
1564 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
1565 if(fread(buffer, 1, len, file) != len)
1566 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1567 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN == 1);
1568 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN == 1);
1569 track->type = buffer[0] >> 7;
1570 track->pre_emphasis = (buffer[0] >> 6) & 1;
1572 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
1573 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
1574 if(fread(buffer, 1, len, file) != len)
1575 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1576 track->num_indices = (FLAC__byte)unpack_uint32_(buffer, len);
1578 if(track->num_indices == 0) {
1581 else if(0 == (track->indices = (FLAC__StreamMetadata_CueSheet_Index*)calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index))))
1582 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1584 for(i = 0; i < track->num_indices; i++) {
1585 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
1586 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
1587 if(fread(buffer, 1, len, file) != len)
1588 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1589 track->indices[i].offset = unpack_uint64_(buffer, len);
1591 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
1592 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
1593 if(fread(buffer, 1, len, file) != len)
1594 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1595 track->indices[i].number = (FLAC__byte)unpack_uint32_(buffer, len);
1597 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
1598 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
1599 if(fread(buffer, 1, len, file) != len)
1600 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1603 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1606 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_(FILE *file, FLAC__StreamMetadata_CueSheet *block)
1609 FLAC__Metadata_SimpleIteratorStatus status;
1610 FLAC__byte buffer[max(sizeof(FLAC__uint64), FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8)]; /* the largest object we'll read in one shot */
1612 FLAC__ASSERT(0 != file);
1614 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
1615 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
1616 if(fread(block->media_catalog_number, 1, len, file) != len)
1617 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1619 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
1620 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
1621 if(fread(buffer, 1, len, file) != len)
1622 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1623 block->lead_in = unpack_uint64_(buffer, len);
1625 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN % 8 == 0);
1626 len = FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN / 8;
1627 if(fread(buffer, 1, len, file) != len)
1628 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1630 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
1631 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
1632 if(fread(buffer, 1, len, file) != len)
1633 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1634 block->num_tracks = unpack_uint32_(buffer, len);
1636 if(block->num_tracks == 0) {
1639 else if(0 == (block->tracks = (FLAC__StreamMetadata_CueSheet_Track*)calloc(block->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track))))
1640 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1642 for(i = 0; i < block->num_tracks; i++) {
1643 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_cuesheet_track_(file, block->tracks + i)))
1647 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1650 FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
1652 FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH];
1654 FLAC__ASSERT(0 != file);
1655 FLAC__ASSERT(0 != status);
1656 FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
1658 buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type;
1659 pack_uint32_(block->length, buffer + 1, 3);
1661 if(fwrite(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, file) != FLAC__STREAM_METADATA_HEADER_LENGTH) {
1662 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1669 FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
1671 FLAC__ASSERT(0 != file);
1672 FLAC__ASSERT(0 != status);
1674 switch(block->type) {
1675 case FLAC__METADATA_TYPE_STREAMINFO:
1676 *status = write_metadata_block_data_streaminfo_(file, &block->data.stream_info);
1678 case FLAC__METADATA_TYPE_PADDING:
1679 *status = write_metadata_block_data_padding_(file, &block->data.padding, block->length);
1681 case FLAC__METADATA_TYPE_APPLICATION:
1682 *status = write_metadata_block_data_application_(file, &block->data.application, block->length);
1684 case FLAC__METADATA_TYPE_SEEKTABLE:
1685 *status = write_metadata_block_data_seektable_(file, &block->data.seek_table);
1687 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
1688 *status = write_metadata_block_data_vorbis_comment_(file, &block->data.vorbis_comment);
1690 case FLAC__METADATA_TYPE_CUESHEET:
1691 *status = write_metadata_block_data_cuesheet_(file, &block->data.cue_sheet);
1695 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR;
1697 return (*status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
1700 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_streaminfo_(FILE *file, const FLAC__StreamMetadata_StreamInfo *block)
1702 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
1703 const unsigned channels1 = block->channels - 1;
1704 const unsigned bps1 = block->bits_per_sample - 1;
1706 FLAC__ASSERT(0 != file);
1708 /* @@@ we are using hardcoded numbers for simplicity but we should
1709 * probably eventually write a bit-level packer and use the
1710 * _STREAMINFO_ constants.
1712 pack_uint32_(block->min_blocksize, buffer, 2);
1713 pack_uint32_(block->max_blocksize, buffer+2, 2);
1714 pack_uint32_(block->min_framesize, buffer+4, 3);
1715 pack_uint32_(block->max_framesize, buffer+7, 3);
1716 buffer[10] = (block->sample_rate >> 12) & 0xff;
1717 buffer[11] = (block->sample_rate >> 4) & 0xff;
1718 buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4);
1719 buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f));
1720 pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4);
1721 memcpy(buffer+18, block->md5sum, 16);
1723 if(fwrite(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, file) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
1724 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1726 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1729 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_padding_(FILE *file, const FLAC__StreamMetadata_Padding *block, unsigned block_length)
1731 unsigned i, n = block_length;
1732 FLAC__byte buffer[1024];
1734 FLAC__ASSERT(0 != file);
1738 memset(buffer, 0, 1024);
1740 for(i = 0; i < n/1024; i++)
1741 if(fwrite(buffer, 1, 1024, file) != 1024)
1742 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1746 if(fwrite(buffer, 1, n, file) != n)
1747 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1749 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1752 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_application_(FILE *file, const FLAC__StreamMetadata_Application *block, unsigned block_length)
1754 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
1756 FLAC__ASSERT(0 != file);
1758 if(fwrite(block->id, 1, id_bytes, file) != id_bytes)
1759 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1761 block_length -= id_bytes;
1763 if(fwrite(block->data, 1, block_length, file) != block_length)
1764 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1766 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1769 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_seektable_(FILE *file, const FLAC__StreamMetadata_SeekTable *block)
1772 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
1774 FLAC__ASSERT(0 != file);
1776 for(i = 0; i < block->num_points; i++) {
1777 /*@@@ some MAGIC NUMBERs here */
1778 pack_uint64_(block->points[i].sample_number, buffer, 8);
1779 pack_uint64_(block->points[i].stream_offset, buffer+8, 8);
1780 pack_uint32_(block->points[i].frame_samples, buffer+16, 2);
1781 if(fwrite(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, file) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
1782 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1785 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1788 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_vorbis_comment_(FILE *file, const FLAC__StreamMetadata_VorbisComment *block)
1791 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
1792 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
1793 FLAC__byte buffer[4]; /* magic number is asserted below */
1795 FLAC__ASSERT(max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == 4);
1796 FLAC__ASSERT(0 != file);
1798 pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len);
1799 if(fwrite(buffer, 1, entry_length_len, file) != entry_length_len)
1800 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1801 if(fwrite(block->vendor_string.entry, 1, block->vendor_string.length, file) != block->vendor_string.length)
1802 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1804 pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len);
1805 if(fwrite(buffer, 1, num_comments_len, file) != num_comments_len)
1806 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1808 for(i = 0; i < block->num_comments; i++) {
1809 pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len);
1810 if(fwrite(buffer, 1, entry_length_len, file) != entry_length_len)
1811 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1812 if(fwrite(block->comments[i].entry, 1, block->comments[i].length, file) != block->comments[i].length)
1813 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1816 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1819 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_cuesheet_(FILE *file, const FLAC__StreamMetadata_CueSheet *block)
1822 FLAC__byte buffer[1024]; /* asserted below that this is big enough */
1824 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
1825 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8);
1826 FLAC__ASSERT(sizeof(buffer) >= (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN)/8);
1827 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
1829 FLAC__ASSERT(0 != file);
1831 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
1832 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
1833 if(fwrite(block->media_catalog_number, 1, len, file) != len)
1834 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1836 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
1837 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
1838 pack_uint64_(block->lead_in, buffer, len);
1839 if(fwrite(buffer, 1, len, file) != len)
1840 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1842 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN % 8 == 0);
1843 len = FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN / 8;
1844 memset(buffer, 0, len);
1845 if(fwrite(buffer, 1, len, file) != len)
1846 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1848 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
1849 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
1850 pack_uint32_(block->num_tracks, buffer, len);
1851 if(fwrite(buffer, 1, len, file) != len)
1852 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1854 for(i = 0; i < block->num_tracks; i++) {
1855 FLAC__StreamMetadata_CueSheet_Track *track = block->tracks + i;
1857 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
1858 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
1859 pack_uint64_(track->offset, buffer, len);
1860 if(fwrite(buffer, 1, len, file) != len)
1861 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1863 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
1864 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
1865 pack_uint32_(track->number, buffer, len);
1866 if(fwrite(buffer, 1, len, file) != len)
1867 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1869 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
1870 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
1871 if(fwrite(track->isrc, 1, len, file) != len)
1872 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1874 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) % 8 == 0);
1875 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
1876 memset(buffer, 0, len);
1877 buffer[0] = (track->type << 7) | (track->pre_emphasis << 6);
1878 if(fwrite(buffer, 1, len, file) != len)
1879 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1881 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
1882 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
1883 pack_uint32_(track->num_indices, buffer, len);
1884 if(fwrite(buffer, 1, len, file) != len)
1885 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1887 for(j = 0; j < track->num_indices; j++) {
1888 FLAC__StreamMetadata_CueSheet_Index *index = track->indices + j;
1890 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
1891 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
1892 pack_uint64_(index->offset, buffer, len);
1893 if(fwrite(buffer, 1, len, file) != len)
1894 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1896 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
1897 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
1898 pack_uint32_(index->number, buffer, len);
1899 if(fwrite(buffer, 1, len, file) != len)
1900 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1902 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
1903 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
1904 memset(buffer, 0, len);
1905 if(fwrite(buffer, 1, len, file) != len)
1906 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1910 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1913 FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block)
1915 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
1916 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1920 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
1923 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
1926 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
1927 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1931 return read_metadata_block_header_(iterator);
1934 FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last)
1936 FLAC__StreamMetadata *padding;
1938 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
1939 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1943 block->is_last = false;
1945 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
1948 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
1951 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
1952 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1954 padding->is_last = padding_is_last;
1955 padding->length = padding_length;
1957 if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) {
1958 FLAC__metadata_object_delete(padding);
1962 if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) {
1963 FLAC__metadata_object_delete(padding);
1967 FLAC__metadata_object_delete(padding);
1969 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
1970 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1974 return read_metadata_block_header_(iterator);
1977 FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append)
1981 int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */
1982 long fixup_is_last_flag_offset = -1;
1984 FLAC__ASSERT(0 != block || append == false);
1986 if(iterator->is_last) {
1988 fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */
1989 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
1991 else if(0 == block) {
1992 simple_iterator_push_(iterator);
1993 if(!FLAC__metadata_simple_iterator_prev(iterator)) {
1994 (void)simple_iterator_pop_(iterator);
1997 fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */
1998 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
1999 if(!simple_iterator_pop_(iterator))
2004 if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append))
2008 if(!write_metadata_block_header_(tempfile, &iterator->status, block)) {
2009 cleanup_tempfile_(&tempfile, &tempfilename);
2013 if(!write_metadata_block_data_(tempfile, &iterator->status, block)) {
2014 cleanup_tempfile_(&tempfile, &tempfilename);
2019 if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0))
2023 return FLAC__metadata_simple_iterator_next(iterator);
2028 FLAC__bool chain_rewrite_chain_(FLAC__Metadata_Chain *chain)
2031 FLAC__Metadata_Node *node;
2032 FLAC__Metadata_SimpleIteratorStatus status;
2034 FLAC__ASSERT(0 != chain);
2035 FLAC__ASSERT(0 != chain->filename);
2036 FLAC__ASSERT(0 != chain->head);
2038 if(0 == (f = fopen(chain->filename, "r+b"))) {
2039 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
2042 if(0 != fseek(f, chain->first_offset, SEEK_SET)) {
2043 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
2047 for(node = chain->head; node; node = node->next) {
2048 if(!write_metadata_block_header_(f, &status, node->data)) {
2049 chain->status = get_equivalent_status_(status);
2052 if(!write_metadata_block_data_(f, &status, node->data)) {
2053 chain->status = get_equivalent_status_(status);
2058 /*FLAC__ASSERT(fflush(), ftell() == chain->last_offset);*/
2065 FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix)
2069 FLAC__Metadata_SimpleIteratorStatus status;
2070 const FLAC__Metadata_Node *node;
2072 FLAC__ASSERT(0 != chain);
2073 FLAC__ASSERT(0 != chain->filename);
2074 FLAC__ASSERT(0 != chain->head);
2076 /* copy the file prefix (data up to first metadata block */
2077 if(0 == (f = fopen(chain->filename, "rb"))) {
2078 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
2081 if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) {
2082 chain->status = get_equivalent_status_(status);
2083 cleanup_tempfile_(&tempfile, &tempfilename);
2086 if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) {
2087 chain->status = get_equivalent_status_(status);
2088 cleanup_tempfile_(&tempfile, &tempfilename);
2092 /* write the metadata */
2093 for(node = chain->head; node; node = node->next) {
2094 if(!write_metadata_block_header_(tempfile, &status, node->data)) {
2095 chain->status = get_equivalent_status_(status);
2098 if(!write_metadata_block_data_(tempfile, &status, node->data)) {
2099 chain->status = get_equivalent_status_(status);
2103 /*FLAC__ASSERT(fflush(), ftell() == chain->last_offset);*/
2105 /* copy the file postfix (everything after the metadata) */
2106 if(0 != fseek(f, chain->last_offset, SEEK_SET)) {
2107 cleanup_tempfile_(&tempfile, &tempfilename);
2108 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
2111 if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) {
2112 cleanup_tempfile_(&tempfile, &tempfilename);
2113 chain->status = get_equivalent_status_(status);
2117 /* move the tempfile on top of the original */
2119 if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status))
2125 void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator)
2127 FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH);
2128 iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth];
2132 FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator)
2134 FLAC__ASSERT(iterator->depth > 0);
2136 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2137 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2141 return read_metadata_block_header_(iterator);
2144 unsigned seek_to_first_metadata_block_(FILE *f)
2146 FLAC__byte buffer[4];
2150 FLAC__ASSERT(0 != f);
2151 FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == 4);
2153 /* skip any id3v2 tag */
2154 #if !defined _MSC_VER && !defined __MINGW32__
2155 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
2158 n = fread(buffer, 1, 4, f);
2159 #if !defined _MSC_VER && !defined __MINGW32__
2160 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
2167 else if(0 == memcmp(buffer, "ID3", 3)) {
2168 unsigned tag_length = 0;
2170 /* skip to the tag length */
2171 if(fseek(f, 2, SEEK_CUR) < 0)
2174 /* read the length */
2175 for(i = 0; i < 4; i++) {
2176 if(fread(buffer, 1, 1, f) < 1 || buffer[0] & 0x80)
2179 tag_length |= (buffer[0] & 0x7f);
2182 /* skip the rest of the tag */
2183 if(fseek(f, tag_length, SEEK_CUR) < 0)
2186 /* read the stream sync code */
2187 #if !defined _MSC_VER && !defined __MINGW32__
2188 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
2191 n = fread(buffer, 1, 4, f);
2192 #if !defined _MSC_VER && !defined __MINGW32__
2193 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
2202 /* check for the fLaC signature */
2203 if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH))
2209 FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append)
2211 const long offset_end = append? iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length : iterator->offset[iterator->depth];
2213 if(0 != fseek(iterator->file, 0, SEEK_SET)) {
2214 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2217 if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) {
2218 cleanup_tempfile_(tempfile, tempfilename);
2221 if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) {
2222 cleanup_tempfile_(tempfile, tempfilename);
2229 FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, long fixup_is_last_flag_offset, FLAC__bool backup)
2231 long save_offset = iterator->offset[iterator->depth]; /*@@@ 2G limit */
2232 FLAC__ASSERT(0 != *tempfile);
2234 if(0 != fseek(iterator->file, save_offset + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length, SEEK_SET)) {
2235 cleanup_tempfile_(tempfile, tempfilename);
2236 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2239 if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) {
2240 cleanup_tempfile_(tempfile, tempfilename);
2244 if(fixup_is_last_code != 0) {
2246 * if code == 1, it means a block was appended to the end so
2247 * we have to clear the is_last flag of the previous block
2248 * if code == -1, it means the last block was deleted so
2249 * we have to set the is_last flag of the previous block
2251 /*@@@ MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */
2253 if(0 != fseek(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
2254 cleanup_tempfile_(tempfile, tempfilename);
2255 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2258 if(fread(&x, 1, 1, *tempfile) != 1) {
2259 cleanup_tempfile_(tempfile, tempfilename);
2260 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2263 if(fixup_is_last_code > 0) {
2264 FLAC__ASSERT(x & 0x80);
2268 FLAC__ASSERT(!(x & 0x80));
2271 if(0 != fseek(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
2272 cleanup_tempfile_(tempfile, tempfilename);
2273 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2276 if(fwrite(&x, 1, 1, *tempfile) != 1) {
2277 cleanup_tempfile_(tempfile, tempfilename);
2278 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2283 (void)fclose(iterator->file);
2285 if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status))
2288 if(iterator->has_stats)
2289 set_file_stats_(iterator->filename, &iterator->stats);
2291 if(!simple_iterator_prime_input_(iterator, !iterator->is_writable))
2294 while(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length < save_offset)
2295 if(!FLAC__metadata_simple_iterator_next(iterator))
2300 /* move the iterator to it's original block faster by faking a push, then doing a pop_ */
2301 FLAC__ASSERT(iterator->depth == 0);
2302 iterator->offset[0] = save_offset;
2304 return simple_iterator_pop_(iterator);
2308 FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, unsigned bytes/*@@@ 4G limit*/, FLAC__Metadata_SimpleIteratorStatus *status)
2310 FLAC__byte buffer[8192];
2314 n = min(sizeof(buffer), bytes);
2315 if(fread(buffer, 1, n, file) != n) {
2316 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2319 if(fwrite(buffer, 1, n, tempfile) != n) {
2320 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2329 FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status)
2331 FLAC__byte buffer[8192];
2334 while(!feof(file)) {
2335 n = fread(buffer, 1, sizeof(buffer), file);
2336 if(n == 0 && !feof(file)) {
2337 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2340 if(n > 0 && fwrite(buffer, 1, n, tempfile) != n) {
2341 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2349 FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
2351 static const char *tempfile_suffix = ".metadata_edit";
2352 if(0 == tempfile_path_prefix) {
2353 if(0 == (*tempfilename = (char*)malloc(strlen(filename) + strlen(tempfile_suffix) + 1))) {
2354 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2357 strcpy(*tempfilename, filename);
2358 strcat(*tempfilename, tempfile_suffix);
2361 const char *p = strrchr(filename, '/');
2367 if(0 == (*tempfilename = (char*)malloc(strlen(tempfile_path_prefix) + 1 + strlen(p) + strlen(tempfile_suffix) + 1))) {
2368 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2371 strcpy(*tempfilename, tempfile_path_prefix);
2372 strcat(*tempfilename, "/");
2373 strcat(*tempfilename, p);
2374 strcat(*tempfilename, tempfile_suffix);
2377 if(0 == (*tempfile = fopen(*tempfilename, "w+b"))) {
2378 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
2385 FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
2387 FLAC__ASSERT(0 != filename);
2388 FLAC__ASSERT(0 != tempfile);
2389 FLAC__ASSERT(0 != *tempfile);
2390 FLAC__ASSERT(0 != tempfilename);
2391 FLAC__ASSERT(0 != *tempfilename);
2392 FLAC__ASSERT(0 != status);
2394 (void)fclose(*tempfile);
2397 #if defined _MSC_VER || defined __MINGW32__
2398 if(unlink(filename) < 0) {
2399 cleanup_tempfile_(tempfile, tempfilename);
2400 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR;
2405 /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just rename(): */
2406 if(0 != rename(*tempfilename, filename)) {
2407 cleanup_tempfile_(tempfile, tempfilename);
2408 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR;
2412 cleanup_tempfile_(tempfile, tempfilename);
2417 void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
2419 if(0 != *tempfile) {
2420 (void)fclose(*tempfile);
2424 if(0 != *tempfilename) {
2425 (void)unlink(*tempfilename);
2426 free(*tempfilename);
2431 FLAC__bool get_file_stats_(const char *filename, struct stat *stats)
2433 FLAC__ASSERT(0 != filename);
2434 FLAC__ASSERT(0 != stats);
2435 return (0 == stat(filename, stats));
2438 void set_file_stats_(const char *filename, struct stat *stats)
2440 struct utimbuf srctime;
2442 FLAC__ASSERT(0 != filename);
2443 FLAC__ASSERT(0 != stats);
2445 srctime.actime = stats->st_atime;
2446 srctime.modtime = stats->st_mtime;
2447 (void)chmod(filename, stats->st_mode);
2448 (void)utime(filename, &srctime);
2449 #if !defined _MSC_VER && !defined __MINGW32__
2450 (void)chown(filename, stats->st_uid, -1);
2451 (void)chown(filename, -1, stats->st_gid);
2455 FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status)
2458 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK:
2459 return FLAC__METADATA_CHAIN_STATUS_OK;
2460 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
2461 return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT;
2462 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
2463 return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
2464 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
2465 return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
2466 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE:
2467 return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE;
2468 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA:
2469 return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
2470 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR:
2471 return FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
2472 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR:
2473 return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
2474 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR:
2475 return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
2476 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR:
2477 return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR;
2478 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR:
2479 return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR;
2480 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR:
2481 return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
2482 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR:
2484 return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;