1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001,2002,2003 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 #ifdef FLAC__VALGRIND_TESTING
115 static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
117 size_t ret = fwrite(ptr, size, nmemb, stream);
123 #define local__fwrite fwrite
126 /****************************************************************************
128 * Level 0 implementation
130 ***************************************************************************/
132 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
133 static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
134 static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
137 FLAC__bool got_error;
138 FLAC__bool got_streaminfo;
139 FLAC__StreamMetadata *streaminfo;
140 } level0_client_data;
142 FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
144 level0_client_data cd;
145 FLAC__FileDecoder *decoder;
147 FLAC__ASSERT(0 != filename);
148 FLAC__ASSERT(0 != streaminfo);
150 decoder = FLAC__file_decoder_new();
155 cd.got_error = false;
156 cd.got_streaminfo = false;
157 cd.streaminfo = streaminfo;
159 FLAC__file_decoder_set_md5_checking(decoder, false);
160 FLAC__file_decoder_set_filename(decoder, filename);
161 FLAC__file_decoder_set_metadata_ignore_all(decoder);
162 FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_STREAMINFO);
163 FLAC__file_decoder_set_write_callback(decoder, write_callback_);
164 FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_);
165 FLAC__file_decoder_set_error_callback(decoder, error_callback_);
166 FLAC__file_decoder_set_client_data(decoder, &cd);
168 if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK || cd.got_error) {
169 FLAC__file_decoder_finish(decoder);
170 FLAC__file_decoder_delete(decoder);
174 /* the first thing decoded must be the STREAMINFO block: */
175 if(!FLAC__file_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
176 FLAC__file_decoder_finish(decoder);
177 FLAC__file_decoder_delete(decoder);
181 FLAC__file_decoder_finish(decoder);
182 FLAC__file_decoder_delete(decoder);
184 return !cd.got_error && cd.got_streaminfo;
187 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
189 (void)decoder, (void)frame, (void)buffer, (void)client_data;
191 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
194 void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
196 level0_client_data *cd = (level0_client_data *)client_data;
199 if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO && 0 != cd->streaminfo) {
200 *(cd->streaminfo) = *metadata;
201 cd->got_streaminfo = true;
205 void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
207 level0_client_data *cd = (level0_client_data *)client_data;
210 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
211 cd->got_error = true;
215 /****************************************************************************
217 * Level 1 implementation
219 ***************************************************************************/
221 #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4)
222 /* 1 for initial offset, +4 for our own personal use */
224 struct FLAC__Metadata_SimpleIterator {
226 char *filename, *tempfile_path_prefix;
228 FLAC__bool has_stats;
229 FLAC__bool is_writable;
230 FLAC__Metadata_SimpleIteratorStatus status;
231 /*@@@ 2G limits here because of the offset type: */
232 long offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH];
233 long first_offset; /* this is the offset to the STREAMINFO block */
235 /* this is the metadata block header of the current block we are pointing to: */
237 FLAC__MetadataType type;
241 FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = {
242 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK",
243 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT",
244 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE",
245 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE",
246 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE",
247 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA",
248 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR",
249 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR",
250 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR",
251 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR",
252 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR",
253 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR",
254 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR"
258 FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new()
260 FLAC__Metadata_SimpleIterator *iterator = (FLAC__Metadata_SimpleIterator*)calloc(1, sizeof(FLAC__Metadata_SimpleIterator));
264 iterator->filename = 0;
265 iterator->tempfile_path_prefix = 0;
266 iterator->has_stats = false;
267 iterator->is_writable = false;
268 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
269 iterator->first_offset = iterator->offset[0] = -1;
276 static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator)
278 FLAC__ASSERT(0 != iterator);
280 if(0 != iterator->file) {
281 fclose(iterator->file);
283 if(iterator->has_stats)
284 set_file_stats_(iterator->filename, &iterator->stats);
286 if(0 != iterator->filename) {
287 free(iterator->filename);
288 iterator->filename = 0;
290 if(0 != iterator->tempfile_path_prefix) {
291 free(iterator->tempfile_path_prefix);
292 iterator->tempfile_path_prefix = 0;
296 FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator)
298 FLAC__ASSERT(0 != iterator);
300 simple_iterator_free_guts_(iterator);
304 FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator)
306 FLAC__Metadata_SimpleIteratorStatus status;
308 FLAC__ASSERT(0 != iterator);
310 status = iterator->status;
311 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
315 static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only)
319 FLAC__ASSERT(0 != iterator);
321 if(read_only || 0 == (iterator->file = fopen(iterator->filename, "r+b"))) {
322 iterator->is_writable = false;
323 #if !defined _MSC_VER && !defined __MINGW32__
324 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
325 if(read_only || errno == EACCES) {
327 if(0 == (iterator->file = fopen(iterator->filename, "rb"))) {
328 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
331 #if !defined _MSC_VER && !defined __MINGW32__
334 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
340 iterator->is_writable = true;
343 ret = seek_to_first_metadata_block_(iterator->file);
347 iterator->first_offset = iterator->offset[iterator->depth] = ftell(iterator->file);
348 return read_metadata_block_header_(iterator);
350 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
353 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE;
362 @@@ If we decide to finish implementing this, put this comment back in metadata.h
364 * The 'tempfile_path_prefix' allows you to specify a directory where
365 * tempfiles should go. Remember that if your metadata edits cause the
366 * FLAC file to grow, the entire file will have to be rewritten. If
367 * 'tempfile_path_prefix' is NULL, the temp file will be written in the
368 * same directory as the original FLAC file. This makes replacing the
369 * original with the tempfile fast but requires extra space in the same
370 * partition for the tempfile. If space is a problem, you can pass a
371 * directory name belonging to a different partition in
372 * 'tempfile_path_prefix'. Note that you should use the forward slash
373 * '/' as the directory separator. A trailing slash is not needed; it
374 * will be added automatically.
376 FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix);
379 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)
381 const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'rename(...)' for what it will take to finish implementing this */
383 FLAC__ASSERT(0 != iterator);
384 FLAC__ASSERT(0 != filename);
386 simple_iterator_free_guts_(iterator);
388 if(!read_only && preserve_file_stats)
389 iterator->has_stats = get_file_stats_(filename, &iterator->stats);
391 if(0 == (iterator->filename = strdup(filename))) {
392 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
395 if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) {
396 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
400 return simple_iterator_prime_input_(iterator, read_only);
403 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator)
405 FLAC__ASSERT(0 != iterator);
406 FLAC__ASSERT(0 != iterator->file);
408 return iterator->is_writable;
411 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator)
413 FLAC__ASSERT(0 != iterator);
414 FLAC__ASSERT(0 != iterator->file);
416 if(iterator->is_last)
419 if(0 != fseek(iterator->file, iterator->length, SEEK_CUR)) {
420 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
424 iterator->offset[iterator->depth] = ftell(iterator->file);
426 return read_metadata_block_header_(iterator);
429 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator)
433 FLAC__ASSERT(0 != iterator);
434 FLAC__ASSERT(0 != iterator->file);
436 if(iterator->offset[iterator->depth] == iterator->first_offset)
439 if(0 != fseek(iterator->file, iterator->first_offset, SEEK_SET)) {
440 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
443 this_offset = iterator->first_offset;
444 if(!read_metadata_block_header_(iterator))
447 /* we ignore any error from ftell() and catch it in fseek() */
448 while(ftell(iterator->file) + (long)iterator->length < iterator->offset[iterator->depth]) {
449 if(0 != fseek(iterator->file, iterator->length, SEEK_CUR)) {
450 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
453 this_offset = ftell(iterator->file);
454 if(!read_metadata_block_header_(iterator))
458 iterator->offset[iterator->depth] = this_offset;
463 FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator)
465 FLAC__ASSERT(0 != iterator);
466 FLAC__ASSERT(0 != iterator->file);
468 return iterator->type;
471 FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
473 FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);
475 FLAC__ASSERT(0 != iterator);
476 FLAC__ASSERT(0 != iterator->file);
479 block->is_last = iterator->is_last;
480 block->length = iterator->length;
482 if(!read_metadata_block_data_(iterator, block)) {
483 FLAC__metadata_object_delete(block);
487 /* back up to the beginning of the block data to stay consistent */
488 if(0 != fseek(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) {
489 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
490 FLAC__metadata_object_delete(block);
495 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
500 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
502 FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth];)
505 FLAC__ASSERT(0 != iterator);
506 FLAC__ASSERT(0 != iterator->file);
507 FLAC__ASSERT(0 != block);
509 if(!iterator->is_writable) {
510 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
514 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) {
515 if(iterator->type != block->type) {
516 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
521 block->is_last = iterator->is_last;
523 if(iterator->length == block->length)
524 return write_metadata_block_stationary_(iterator, block);
525 else if(iterator->length > block->length) {
526 if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) {
527 ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last);
528 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
529 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
533 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
534 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
535 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
539 else /* iterator->length < block->length */ {
540 unsigned padding_leftover = 0;
541 FLAC__bool padding_is_last = false;
543 /* first see if we can even use padding */
544 if(iterator->is_last) {
548 const unsigned extra_padding_bytes_required = block->length - iterator->length;
549 simple_iterator_push_(iterator);
550 if(!FLAC__metadata_simple_iterator_next(iterator)) {
551 (void)simple_iterator_pop_(iterator);
554 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
558 if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) {
559 padding_leftover = 0;
560 block->is_last = iterator->is_last;
562 else if(iterator->length < extra_padding_bytes_required)
565 padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required;
566 padding_is_last = iterator->is_last;
567 block->is_last = false;
570 if(!simple_iterator_pop_(iterator))
575 if(padding_leftover == 0) {
576 ret = write_metadata_block_stationary_(iterator, block);
577 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
578 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
582 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
583 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
584 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
585 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
590 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
591 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
592 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
598 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
600 unsigned padding_leftover = 0;
601 FLAC__bool padding_is_last = false;
603 FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;)
606 FLAC__ASSERT(0 != iterator);
607 FLAC__ASSERT(0 != iterator->file);
608 FLAC__ASSERT(0 != block);
610 if(!iterator->is_writable)
613 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
614 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
618 block->is_last = iterator->is_last;
621 /* first see if we can even use padding */
622 if(iterator->is_last) {
626 simple_iterator_push_(iterator);
627 if(!FLAC__metadata_simple_iterator_next(iterator)) {
628 (void)simple_iterator_pop_(iterator);
631 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
635 if(iterator->length == block->length) {
636 padding_leftover = 0;
637 block->is_last = iterator->is_last;
639 else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length)
642 padding_leftover = iterator->length - block->length;
643 padding_is_last = iterator->is_last;
644 block->is_last = false;
647 if(!simple_iterator_pop_(iterator))
652 /* move to the next block, which is suitable padding */
653 if(!FLAC__metadata_simple_iterator_next(iterator))
655 if(padding_leftover == 0) {
656 ret = write_metadata_block_stationary_(iterator, block);
657 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
658 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
662 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
663 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
664 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
665 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
670 ret = rewrite_whole_file_(iterator, block, /*append=*/true);
671 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
672 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
677 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding)
679 FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth];)
682 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) {
683 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
688 FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
690 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
693 padding->length = iterator->length;
694 if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) {
695 FLAC__metadata_object_delete(padding);
698 FLAC__metadata_object_delete(padding);
699 if(!FLAC__metadata_simple_iterator_prev(iterator))
701 FLAC__ASSERT(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length == debug_target_offset);
702 FLAC__ASSERT(ftell(iterator->file) + (long)iterator->length == debug_target_offset);
706 ret = rewrite_whole_file_(iterator, 0, /*append=*/false);
707 FLAC__ASSERT(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length == debug_target_offset);
708 FLAC__ASSERT(ftell(iterator->file) + (long)iterator->length == debug_target_offset);
715 /****************************************************************************
717 * Level 2 implementation
719 ***************************************************************************/
722 typedef struct FLAC__Metadata_Node {
723 FLAC__StreamMetadata *data;
724 struct FLAC__Metadata_Node *prev, *next;
725 } FLAC__Metadata_Node;
727 struct FLAC__Metadata_Chain {
729 FLAC__Metadata_Node *head;
730 FLAC__Metadata_Node *tail;
732 FLAC__Metadata_ChainStatus status;
733 long first_offset, last_offset; /*@@@ 2G limit */
735 * This is the length of the chain initially read from the FLAC file.
736 * it is used to compare against the current length to decide whether
737 * or not the whole file has to be rewritten.
739 unsigned initial_length; /*@@@ 4G limit */
742 struct FLAC__Metadata_Iterator {
743 FLAC__Metadata_Chain *chain;
744 FLAC__Metadata_Node *current;
747 FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = {
748 "FLAC__METADATA_CHAIN_STATUS_OK",
749 "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT",
750 "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE",
751 "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE",
752 "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE",
753 "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA",
754 "FLAC__METADATA_CHAIN_STATUS_READ_ERROR",
755 "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR",
756 "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR",
757 "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR",
758 "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR",
759 "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR",
760 "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR"
764 static FLAC__Metadata_Node *node_new_()
766 return (FLAC__Metadata_Node*)calloc(1, sizeof(FLAC__Metadata_Node));
769 static void node_delete_(FLAC__Metadata_Node *node)
771 FLAC__ASSERT(0 != node);
773 FLAC__metadata_object_delete(node->data);
777 static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
779 FLAC__ASSERT(0 != chain);
780 FLAC__ASSERT(0 != node);
781 FLAC__ASSERT(0 != node->data);
783 node->next = node->prev = 0;
784 node->data->is_last = true;
786 chain->tail->data->is_last = false;
791 FLAC__ASSERT(0 != chain->tail);
792 chain->tail->next = node;
793 node->prev = chain->tail;
799 static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
801 FLAC__ASSERT(0 != chain);
802 FLAC__ASSERT(0 != node);
804 if(node == chain->head)
805 chain->head = node->next;
807 node->prev->next = node->next;
809 if(node == chain->tail)
810 chain->tail = node->prev;
812 node->next->prev = node->prev;
815 chain->tail->data->is_last = true;
820 static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
822 chain_remove_node_(chain, node);
826 static unsigned chain_calculate_length_(FLAC__Metadata_Chain *chain)
828 const FLAC__Metadata_Node *node;
830 for(node = chain->head; node; node = node->next)
831 length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
835 static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
837 FLAC__ASSERT(0 != node);
838 FLAC__ASSERT(0 != node->data);
839 FLAC__ASSERT(0 != iterator);
840 FLAC__ASSERT(0 != iterator->current);
841 FLAC__ASSERT(0 != iterator->chain);
842 FLAC__ASSERT(0 != iterator->chain->head);
843 FLAC__ASSERT(0 != iterator->chain->tail);
845 node->data->is_last = false;
847 node->prev = iterator->current->prev;
848 node->next = iterator->current;
851 iterator->chain->head = node;
853 node->prev->next = node;
855 iterator->current->prev = node;
857 iterator->chain->nodes++;
860 static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
862 FLAC__ASSERT(0 != node);
863 FLAC__ASSERT(0 != node->data);
864 FLAC__ASSERT(0 != iterator);
865 FLAC__ASSERT(0 != iterator->current);
866 FLAC__ASSERT(0 != iterator->chain);
867 FLAC__ASSERT(0 != iterator->chain->head);
868 FLAC__ASSERT(0 != iterator->chain->tail);
870 iterator->current->data->is_last = false;
872 node->prev = iterator->current;
873 node->next = iterator->current->next;
876 iterator->chain->tail = node;
878 node->next->prev = node;
880 node->prev->next = node;
882 iterator->chain->tail->data->is_last = true;
884 iterator->chain->nodes++;
887 /* return true iff node and node->next are both padding */
888 static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
890 if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) {
891 const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length;
892 node->data->length += growth;
894 chain_delete_node_(chain, node->next);
901 FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new()
903 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)calloc(1, sizeof(FLAC__Metadata_Chain));
907 chain->head = chain->tail = 0;
909 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
910 chain->initial_length = 0;
916 FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain)
918 FLAC__Metadata_Node *node, *next;
920 FLAC__ASSERT(0 != chain);
922 for(node = chain->head; node; ) {
928 if(0 != chain->filename)
929 free(chain->filename);
934 FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain)
936 FLAC__Metadata_ChainStatus status;
938 FLAC__ASSERT(0 != chain);
940 status = chain->status;
941 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
945 FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename)
947 FLAC__Metadata_SimpleIterator *iterator;
948 FLAC__Metadata_Node *node;
950 FLAC__ASSERT(0 != chain);
951 FLAC__ASSERT(0 != filename);
953 if(0 == (chain->filename = strdup(filename))) {
954 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
958 if(0 == (iterator = FLAC__metadata_simple_iterator_new())) {
959 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
963 if(!FLAC__metadata_simple_iterator_init(iterator, filename, /*read_only=*/true, /*preserve_file_stats=*/false)) {
964 chain->status = get_equivalent_status_(iterator->status);
968 chain->first_offset = iterator->offset[iterator->depth];
973 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
976 node->data = FLAC__metadata_simple_iterator_get_block(iterator);
977 if(0 == node->data) {
979 chain->status = get_equivalent_status_(iterator->status);
982 chain_append_node_(chain, node);
983 } while(FLAC__metadata_simple_iterator_next(iterator));
985 if(!iterator->is_last || iterator->status != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK) {
986 chain->status = get_equivalent_status_(iterator->status);
990 chain->last_offset = ftell(iterator->file) + iterator->length;
991 FLAC__metadata_simple_iterator_delete(iterator);
993 chain->initial_length = chain_calculate_length_(chain);
997 FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats)
1000 const char *tempfile_path_prefix = 0;
1001 unsigned current_length;
1003 FLAC__ASSERT(0 != chain);
1005 current_length = chain_calculate_length_(chain);
1008 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1009 const unsigned delta = chain->initial_length - current_length;
1010 chain->tail->data->length += delta;
1011 current_length += delta;
1012 FLAC__ASSERT(current_length == chain->initial_length);
1014 else if(current_length + FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1015 FLAC__StreamMetadata *padding;
1016 FLAC__Metadata_Node *node;
1017 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) {
1018 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1021 padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length);
1022 if(0 == (node = node_new_())) {
1023 FLAC__metadata_object_delete(padding);
1024 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1027 node->data = padding;
1028 chain_append_node_(chain, node);
1029 current_length = chain_calculate_length_(chain);
1030 FLAC__ASSERT(current_length == chain->initial_length);
1032 else if(current_length > chain->initial_length) {
1033 const unsigned delta = current_length - chain->initial_length;
1034 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1035 if(chain->tail->data->length + FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1036 chain_delete_node_(chain, chain->tail);
1037 current_length = chain_calculate_length_(chain);
1038 FLAC__ASSERT(current_length == chain->initial_length);
1040 else if(chain->tail->data->length >= delta) {
1041 chain->tail->data->length -= delta;
1042 current_length -= delta;
1043 FLAC__ASSERT(current_length == chain->initial_length);
1049 if(preserve_file_stats)
1050 get_file_stats_(chain->filename, &stats);
1052 if(current_length == chain->initial_length) {
1053 if(!chain_rewrite_chain_(chain))
1057 if(!chain_rewrite_file_(chain, tempfile_path_prefix))
1061 if(preserve_file_stats)
1062 set_file_stats_(chain->filename, &stats);
1064 /* recompute lengths and offsets if necessary */
1065 if(chain->initial_length != current_length) {
1066 const FLAC__Metadata_Node *node;
1067 chain->initial_length = current_length;
1068 chain->last_offset = chain->first_offset;
1069 for(node = chain->head; node; node = node->next)
1070 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1076 FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain)
1078 FLAC__Metadata_Node *node;
1080 FLAC__ASSERT(0 != chain);
1082 for(node = chain->head; node; ) {
1083 if(!chain_merge_adjacent_padding_(chain, node))
1088 FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain)
1090 FLAC__Metadata_Node *node, *save;
1093 FLAC__ASSERT(0 != chain);
1096 * Don't try and be too smart... this simple algo is good enough for
1097 * the small number of nodes that we deal with.
1099 for(i = 0, node = chain->head; i < chain->nodes; i++) {
1100 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1102 chain_remove_node_(chain, node);
1103 chain_append_node_(chain, node);
1111 FLAC__metadata_chain_merge_padding(chain);
1115 FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new()
1117 FLAC__Metadata_Iterator *iterator = (FLAC__Metadata_Iterator*)calloc(1, sizeof(FLAC__Metadata_Iterator));
1119 /* calloc() implies:
1120 iterator->current = 0;
1121 iterator->chain = 0;
1127 FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator)
1129 FLAC__ASSERT(0 != iterator);
1134 FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain)
1136 FLAC__ASSERT(0 != iterator);
1137 FLAC__ASSERT(0 != chain);
1138 FLAC__ASSERT(0 != chain->head);
1140 iterator->chain = chain;
1141 iterator->current = chain->head;
1144 FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator)
1146 FLAC__ASSERT(0 != iterator);
1148 if(0 == iterator->current || 0 == iterator->current->next)
1151 iterator->current = iterator->current->next;
1155 FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator)
1157 FLAC__ASSERT(0 != iterator);
1159 if(0 == iterator->current || 0 == iterator->current->prev)
1162 iterator->current = iterator->current->prev;
1166 FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator)
1168 FLAC__ASSERT(0 != iterator);
1169 FLAC__ASSERT(0 != iterator->current);
1170 FLAC__ASSERT(0 != iterator->current->data);
1172 return iterator->current->data->type;
1175 FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator)
1177 FLAC__ASSERT(0 != iterator);
1178 FLAC__ASSERT(0 != iterator->current);
1180 return iterator->current->data;
1183 FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1185 FLAC__ASSERT(0 != iterator);
1186 FLAC__ASSERT(0 != block);
1187 return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block);
1190 FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding)
1192 FLAC__Metadata_Node *save;
1194 FLAC__ASSERT(0 != iterator);
1195 FLAC__ASSERT(0 != iterator->current);
1197 if(0 == iterator->current->prev) {
1198 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1202 save = iterator->current->prev;
1204 if(replace_with_padding) {
1205 FLAC__metadata_object_delete_data(iterator->current->data);
1206 iterator->current->data->type = FLAC__METADATA_TYPE_PADDING;
1209 chain_delete_node_(iterator->chain, iterator->current);
1212 iterator->current = save;
1216 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1218 FLAC__Metadata_Node *node;
1220 FLAC__ASSERT(0 != iterator);
1221 FLAC__ASSERT(0 != iterator->current);
1222 FLAC__ASSERT(0 != block);
1224 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1227 if(0 == iterator->current->prev) {
1228 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1232 if(0 == (node = node_new_()))
1236 iterator_insert_node_(iterator, node);
1237 iterator->current = node;
1241 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1243 FLAC__Metadata_Node *node;
1245 FLAC__ASSERT(0 != iterator);
1246 FLAC__ASSERT(0 != iterator->current);
1247 FLAC__ASSERT(0 != block);
1249 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1252 if(0 == (node = node_new_()))
1256 iterator_insert_node_after_(iterator, node);
1257 iterator->current = node;
1262 /****************************************************************************
1264 * Local function definitions
1266 ***************************************************************************/
1268 void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1274 for(i = 0; i < bytes; i++) {
1275 *(--b) = (FLAC__byte)(val & 0xff);
1280 void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1284 for(i = 0; i < bytes; i++) {
1285 *(b++) = (FLAC__byte)(val & 0xff);
1290 void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes)
1296 for(i = 0; i < bytes; i++) {
1297 *(--b) = (FLAC__byte)(val & 0xff);
1302 FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes)
1304 FLAC__uint32 ret = 0;
1307 for(i = 0; i < bytes; i++)
1308 ret = (ret << 8) | (FLAC__uint32)(*b++);
1313 FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes)
1315 FLAC__uint32 ret = 0;
1320 for(i = 0; i < bytes; i++)
1321 ret = (ret << 8) | (FLAC__uint32)(*--b);
1326 FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes)
1328 FLAC__uint64 ret = 0;
1331 for(i = 0; i < bytes; i++)
1332 ret = (ret << 8) | (FLAC__uint64)(*b++);
1337 FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator)
1339 FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH];
1341 FLAC__ASSERT(0 != iterator);
1342 FLAC__ASSERT(0 != iterator->file);
1344 if(fread(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, iterator->file) != FLAC__STREAM_METADATA_HEADER_LENGTH) {
1345 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1349 iterator->is_last = raw_header[0] & 0x80? true : false;
1350 iterator->type = (FLAC__MetadataType)(raw_header[0] & 0x7f);
1351 iterator->length = unpack_uint32_(raw_header + 1, 3);
1353 /* do some checking */
1354 if(iterator->type >= FLAC__METADATA_TYPE_UNDEFINED) {
1355 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA;
1362 FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block)
1364 FLAC__ASSERT(0 != iterator);
1365 FLAC__ASSERT(0 != iterator->file);
1367 switch(block->type) {
1368 case FLAC__METADATA_TYPE_STREAMINFO:
1369 iterator->status = read_metadata_block_data_streaminfo_(iterator->file, &block->data.stream_info);
1371 case FLAC__METADATA_TYPE_PADDING:
1372 iterator->status = read_metadata_block_data_padding_(iterator->file, &block->data.padding, block->length);
1374 case FLAC__METADATA_TYPE_APPLICATION:
1375 iterator->status = read_metadata_block_data_application_(iterator->file, &block->data.application, block->length);
1377 case FLAC__METADATA_TYPE_SEEKTABLE:
1378 iterator->status = read_metadata_block_data_seektable_(iterator->file, &block->data.seek_table, block->length);
1380 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
1381 iterator->status = read_metadata_block_data_vorbis_comment_(iterator->file, &block->data.vorbis_comment);
1383 case FLAC__METADATA_TYPE_CUESHEET:
1384 iterator->status = read_metadata_block_data_cuesheet_(iterator->file, &block->data.cue_sheet);
1388 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR;
1391 return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
1394 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_(FILE *file, FLAC__StreamMetadata_StreamInfo *block)
1396 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b;
1398 FLAC__ASSERT(0 != file);
1400 if(fread(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, file) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
1401 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1405 /* @@@ we are using hardcoded numbers for simplicity but we should
1406 * probably eventually write a bit-level unpacker and use the
1407 * _STREAMINFO_ constants.
1409 block->min_blocksize = unpack_uint32_(b, 2); b += 2;
1410 block->max_blocksize = unpack_uint32_(b, 2); b += 2;
1411 block->min_framesize = unpack_uint32_(b, 3); b += 3;
1412 block->max_framesize = unpack_uint32_(b, 3); b += 3;
1413 block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
1414 block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
1415 block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
1416 block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4);
1417 memcpy(block->md5sum, b+8, 16);
1419 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1423 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_(FILE *file, FLAC__StreamMetadata_Padding *block, unsigned block_length)
1425 FLAC__ASSERT(0 != file);
1427 (void)block; /* nothing to do; we don't care about reading the padding bytes */
1429 if(0 != fseek(file, block_length, SEEK_CUR))
1430 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1432 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1435 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_(FILE *file, FLAC__StreamMetadata_Application *block, unsigned block_length)
1437 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
1439 FLAC__ASSERT(0 != file);
1441 if(fread(block->id, 1, id_bytes, file) != id_bytes)
1442 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1444 block_length -= id_bytes;
1446 if(block_length == 0) {
1450 if(0 == (block->data = (FLAC__byte*)malloc(block_length)))
1451 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1453 if(fread(block->data, 1, block_length, file) != block_length)
1454 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1457 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1460 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_(FILE *file, FLAC__StreamMetadata_SeekTable *block, unsigned block_length)
1463 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
1465 FLAC__ASSERT(0 != file);
1466 FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0);
1468 block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
1470 if(block->num_points == 0)
1472 else if(0 == (block->points = (FLAC__StreamMetadata_SeekPoint*)malloc(block->num_points * sizeof(FLAC__StreamMetadata_SeekPoint))))
1473 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1475 for(i = 0; i < block->num_points; i++) {
1476 if(fread(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, file) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
1477 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1478 /*@@@ some MAGIC NUMBERs here */
1479 block->points[i].sample_number = unpack_uint64_(buffer, 8);
1480 block->points[i].stream_offset = unpack_uint64_(buffer+8, 8);
1481 block->points[i].frame_samples = unpack_uint32_(buffer+16, 2);
1484 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1487 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_(FILE *file, FLAC__StreamMetadata_VorbisComment_Entry *entry)
1489 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
1490 FLAC__byte buffer[4]; /* magic number is asserted below */
1492 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == 4);
1493 FLAC__ASSERT(0 != file);
1495 if(fread(buffer, 1, entry_length_len, file) != entry_length_len)
1496 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1497 entry->length = unpack_uint32_little_endian_(buffer, entry_length_len);
1499 if(0 != entry->entry)
1502 if(entry->length == 0) {
1506 if(0 == (entry->entry = (FLAC__byte*)malloc(entry->length)))
1507 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1509 if(fread(entry->entry, 1, entry->length, file) != entry->length)
1510 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1513 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1516 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_(FILE *file, FLAC__StreamMetadata_VorbisComment *block)
1519 FLAC__Metadata_SimpleIteratorStatus status;
1520 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
1521 FLAC__byte buffer[4]; /* magic number is asserted below */
1523 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == 4);
1524 FLAC__ASSERT(0 != file);
1526 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_(file, &(block->vendor_string))))
1529 if(fread(buffer, 1, num_comments_len, file) != num_comments_len)
1530 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1531 block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len);
1533 if(block->num_comments == 0) {
1534 block->comments = 0;
1536 else if(0 == (block->comments = (FLAC__StreamMetadata_VorbisComment_Entry*)calloc(block->num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry))))
1537 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1539 for(i = 0; i < block->num_comments; i++) {
1540 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_(file, block->comments + i)))
1544 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1547 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_(FILE *file, FLAC__StreamMetadata_CueSheet_Track *track)
1550 FLAC__byte buffer[32]; /* asserted below that this is big enough */
1552 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
1553 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
1554 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);
1556 FLAC__ASSERT(0 != file);
1558 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
1559 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
1560 if(fread(buffer, 1, len, file) != len)
1561 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1562 track->offset = unpack_uint64_(buffer, len);
1564 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
1565 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
1566 if(fread(buffer, 1, len, file) != len)
1567 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1568 track->number = (FLAC__byte)unpack_uint32_(buffer, len);
1570 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
1571 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
1572 if(fread(track->isrc, 1, len, file) != len)
1573 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1575 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);
1576 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
1577 if(fread(buffer, 1, len, file) != len)
1578 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1579 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN == 1);
1580 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN == 1);
1581 track->type = buffer[0] >> 7;
1582 track->pre_emphasis = (buffer[0] >> 6) & 1;
1584 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
1585 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
1586 if(fread(buffer, 1, len, file) != len)
1587 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1588 track->num_indices = (FLAC__byte)unpack_uint32_(buffer, len);
1590 if(track->num_indices == 0) {
1593 else if(0 == (track->indices = (FLAC__StreamMetadata_CueSheet_Index*)calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index))))
1594 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1596 for(i = 0; i < track->num_indices; i++) {
1597 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
1598 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
1599 if(fread(buffer, 1, len, file) != len)
1600 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1601 track->indices[i].offset = unpack_uint64_(buffer, len);
1603 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
1604 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
1605 if(fread(buffer, 1, len, file) != len)
1606 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1607 track->indices[i].number = (FLAC__byte)unpack_uint32_(buffer, len);
1609 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
1610 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
1611 if(fread(buffer, 1, len, file) != len)
1612 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1615 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1618 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_(FILE *file, FLAC__StreamMetadata_CueSheet *block)
1621 FLAC__Metadata_SimpleIteratorStatus status;
1622 FLAC__byte buffer[1024]; /* MSVC needs a constant expression so we put a magic number and assert */
1624 FLAC__ASSERT(0 != file);
1625 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)/8 <= sizeof(buffer));
1626 FLAC__ASSERT(sizeof(FLAC__uint64) <= sizeof(buffer));
1628 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
1629 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
1630 if(fread(block->media_catalog_number, 1, len, file) != len)
1631 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1633 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
1634 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
1635 if(fread(buffer, 1, len, file) != len)
1636 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1637 block->lead_in = unpack_uint64_(buffer, len);
1639 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
1640 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
1641 if(fread(buffer, 1, len, file) != len)
1642 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1643 block->is_cd = buffer[0]&0x80? true : false;
1645 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
1646 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
1647 if(fread(buffer, 1, len, file) != len)
1648 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1649 block->num_tracks = unpack_uint32_(buffer, len);
1651 if(block->num_tracks == 0) {
1654 else if(0 == (block->tracks = (FLAC__StreamMetadata_CueSheet_Track*)calloc(block->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track))))
1655 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1657 for(i = 0; i < block->num_tracks; i++) {
1658 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_cuesheet_track_(file, block->tracks + i)))
1662 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1665 FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
1667 FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH];
1669 FLAC__ASSERT(0 != file);
1670 FLAC__ASSERT(0 != status);
1671 FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
1673 buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type;
1674 pack_uint32_(block->length, buffer + 1, 3);
1676 if(local__fwrite(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, file) != FLAC__STREAM_METADATA_HEADER_LENGTH) {
1677 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1684 FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
1686 FLAC__ASSERT(0 != file);
1687 FLAC__ASSERT(0 != status);
1689 switch(block->type) {
1690 case FLAC__METADATA_TYPE_STREAMINFO:
1691 *status = write_metadata_block_data_streaminfo_(file, &block->data.stream_info);
1693 case FLAC__METADATA_TYPE_PADDING:
1694 *status = write_metadata_block_data_padding_(file, &block->data.padding, block->length);
1696 case FLAC__METADATA_TYPE_APPLICATION:
1697 *status = write_metadata_block_data_application_(file, &block->data.application, block->length);
1699 case FLAC__METADATA_TYPE_SEEKTABLE:
1700 *status = write_metadata_block_data_seektable_(file, &block->data.seek_table);
1702 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
1703 *status = write_metadata_block_data_vorbis_comment_(file, &block->data.vorbis_comment);
1705 case FLAC__METADATA_TYPE_CUESHEET:
1706 *status = write_metadata_block_data_cuesheet_(file, &block->data.cue_sheet);
1710 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR;
1712 return (*status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
1715 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_streaminfo_(FILE *file, const FLAC__StreamMetadata_StreamInfo *block)
1717 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
1718 const unsigned channels1 = block->channels - 1;
1719 const unsigned bps1 = block->bits_per_sample - 1;
1721 FLAC__ASSERT(0 != file);
1723 /* @@@ we are using hardcoded numbers for simplicity but we should
1724 * probably eventually write a bit-level packer and use the
1725 * _STREAMINFO_ constants.
1727 pack_uint32_(block->min_blocksize, buffer, 2);
1728 pack_uint32_(block->max_blocksize, buffer+2, 2);
1729 pack_uint32_(block->min_framesize, buffer+4, 3);
1730 pack_uint32_(block->max_framesize, buffer+7, 3);
1731 buffer[10] = (block->sample_rate >> 12) & 0xff;
1732 buffer[11] = (block->sample_rate >> 4) & 0xff;
1733 buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4);
1734 buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f));
1735 pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4);
1736 memcpy(buffer+18, block->md5sum, 16);
1738 if(local__fwrite(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, file) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
1739 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1741 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1744 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_padding_(FILE *file, const FLAC__StreamMetadata_Padding *block, unsigned block_length)
1746 unsigned i, n = block_length;
1747 FLAC__byte buffer[1024];
1749 FLAC__ASSERT(0 != file);
1753 memset(buffer, 0, 1024);
1755 for(i = 0; i < n/1024; i++)
1756 if(local__fwrite(buffer, 1, 1024, file) != 1024)
1757 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1761 if(local__fwrite(buffer, 1, n, file) != n)
1762 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1764 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1767 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_application_(FILE *file, const FLAC__StreamMetadata_Application *block, unsigned block_length)
1769 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
1771 FLAC__ASSERT(0 != file);
1773 if(local__fwrite(block->id, 1, id_bytes, file) != id_bytes)
1774 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1776 block_length -= id_bytes;
1778 if(local__fwrite(block->data, 1, block_length, file) != block_length)
1779 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1781 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1784 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_seektable_(FILE *file, const FLAC__StreamMetadata_SeekTable *block)
1787 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
1789 FLAC__ASSERT(0 != file);
1791 for(i = 0; i < block->num_points; i++) {
1792 /*@@@ some MAGIC NUMBERs here */
1793 pack_uint64_(block->points[i].sample_number, buffer, 8);
1794 pack_uint64_(block->points[i].stream_offset, buffer+8, 8);
1795 pack_uint32_(block->points[i].frame_samples, buffer+16, 2);
1796 if(local__fwrite(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, file) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
1797 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1800 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1803 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_vorbis_comment_(FILE *file, const FLAC__StreamMetadata_VorbisComment *block)
1806 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
1807 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
1808 FLAC__byte buffer[4]; /* magic number is asserted below */
1810 FLAC__ASSERT(max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == 4);
1811 FLAC__ASSERT(0 != file);
1813 pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len);
1814 if(local__fwrite(buffer, 1, entry_length_len, file) != entry_length_len)
1815 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1816 if(local__fwrite(block->vendor_string.entry, 1, block->vendor_string.length, file) != block->vendor_string.length)
1817 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1819 pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len);
1820 if(local__fwrite(buffer, 1, num_comments_len, file) != num_comments_len)
1821 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1823 for(i = 0; i < block->num_comments; i++) {
1824 pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len);
1825 if(local__fwrite(buffer, 1, entry_length_len, file) != entry_length_len)
1826 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1827 if(local__fwrite(block->comments[i].entry, 1, block->comments[i].length, file) != block->comments[i].length)
1828 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1831 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1834 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_cuesheet_(FILE *file, const FLAC__StreamMetadata_CueSheet *block)
1837 FLAC__byte buffer[1024]; /* asserted below that this is big enough */
1839 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
1840 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8);
1841 FLAC__ASSERT(sizeof(buffer) >= (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN)/8);
1842 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
1844 FLAC__ASSERT(0 != file);
1846 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
1847 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
1848 if(local__fwrite(block->media_catalog_number, 1, len, file) != len)
1849 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1851 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
1852 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
1853 pack_uint64_(block->lead_in, buffer, len);
1854 if(local__fwrite(buffer, 1, len, file) != len)
1855 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1857 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
1858 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
1859 memset(buffer, 0, len);
1862 if(local__fwrite(buffer, 1, len, file) != len)
1863 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1865 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
1866 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
1867 pack_uint32_(block->num_tracks, buffer, len);
1868 if(local__fwrite(buffer, 1, len, file) != len)
1869 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1871 for(i = 0; i < block->num_tracks; i++) {
1872 FLAC__StreamMetadata_CueSheet_Track *track = block->tracks + i;
1874 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
1875 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
1876 pack_uint64_(track->offset, buffer, len);
1877 if(local__fwrite(buffer, 1, len, file) != len)
1878 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1880 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
1881 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
1882 pack_uint32_(track->number, buffer, len);
1883 if(local__fwrite(buffer, 1, len, file) != len)
1884 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1886 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
1887 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
1888 if(local__fwrite(track->isrc, 1, len, file) != len)
1889 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1891 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);
1892 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
1893 memset(buffer, 0, len);
1894 buffer[0] = (track->type << 7) | (track->pre_emphasis << 6);
1895 if(local__fwrite(buffer, 1, len, file) != len)
1896 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1898 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
1899 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
1900 pack_uint32_(track->num_indices, buffer, len);
1901 if(local__fwrite(buffer, 1, len, file) != len)
1902 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1904 for(j = 0; j < track->num_indices; j++) {
1905 FLAC__StreamMetadata_CueSheet_Index *index = track->indices + j;
1907 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
1908 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
1909 pack_uint64_(index->offset, buffer, len);
1910 if(local__fwrite(buffer, 1, len, file) != len)
1911 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1913 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
1914 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
1915 pack_uint32_(index->number, buffer, len);
1916 if(local__fwrite(buffer, 1, len, file) != len)
1917 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1919 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
1920 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
1921 memset(buffer, 0, len);
1922 if(local__fwrite(buffer, 1, len, file) != len)
1923 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1927 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1930 FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block)
1932 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
1933 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1937 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
1940 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
1943 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
1944 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1948 return read_metadata_block_header_(iterator);
1951 FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last)
1953 FLAC__StreamMetadata *padding;
1955 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
1956 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1960 block->is_last = false;
1962 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
1965 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
1968 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
1969 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1971 padding->is_last = padding_is_last;
1972 padding->length = padding_length;
1974 if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) {
1975 FLAC__metadata_object_delete(padding);
1979 if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) {
1980 FLAC__metadata_object_delete(padding);
1984 FLAC__metadata_object_delete(padding);
1986 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
1987 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1991 return read_metadata_block_header_(iterator);
1994 FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append)
1998 int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */
1999 long fixup_is_last_flag_offset = -1;
2001 FLAC__ASSERT(0 != block || append == false);
2003 if(iterator->is_last) {
2005 fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */
2006 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2008 else if(0 == block) {
2009 simple_iterator_push_(iterator);
2010 if(!FLAC__metadata_simple_iterator_prev(iterator)) {
2011 (void)simple_iterator_pop_(iterator);
2014 fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */
2015 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2016 if(!simple_iterator_pop_(iterator))
2021 if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append))
2025 if(!write_metadata_block_header_(tempfile, &iterator->status, block)) {
2026 cleanup_tempfile_(&tempfile, &tempfilename);
2030 if(!write_metadata_block_data_(tempfile, &iterator->status, block)) {
2031 cleanup_tempfile_(&tempfile, &tempfilename);
2036 if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0))
2040 return FLAC__metadata_simple_iterator_next(iterator);
2045 FLAC__bool chain_rewrite_chain_(FLAC__Metadata_Chain *chain)
2048 FLAC__Metadata_Node *node;
2049 FLAC__Metadata_SimpleIteratorStatus status;
2051 FLAC__ASSERT(0 != chain);
2052 FLAC__ASSERT(0 != chain->filename);
2053 FLAC__ASSERT(0 != chain->head);
2055 if(0 == (f = fopen(chain->filename, "r+b"))) {
2056 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
2059 if(0 != fseek(f, chain->first_offset, SEEK_SET)) {
2060 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
2064 for(node = chain->head; node; node = node->next) {
2065 if(!write_metadata_block_header_(f, &status, node->data)) {
2066 chain->status = get_equivalent_status_(status);
2069 if(!write_metadata_block_data_(f, &status, node->data)) {
2070 chain->status = get_equivalent_status_(status);
2075 /*FLAC__ASSERT(fflush(), ftell() == chain->last_offset);*/
2082 FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix)
2086 FLAC__Metadata_SimpleIteratorStatus status;
2087 const FLAC__Metadata_Node *node;
2089 FLAC__ASSERT(0 != chain);
2090 FLAC__ASSERT(0 != chain->filename);
2091 FLAC__ASSERT(0 != chain->head);
2093 /* copy the file prefix (data up to first metadata block */
2094 if(0 == (f = fopen(chain->filename, "rb"))) {
2095 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
2098 if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) {
2099 chain->status = get_equivalent_status_(status);
2100 cleanup_tempfile_(&tempfile, &tempfilename);
2103 if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) {
2104 chain->status = get_equivalent_status_(status);
2105 cleanup_tempfile_(&tempfile, &tempfilename);
2109 /* write the metadata */
2110 for(node = chain->head; node; node = node->next) {
2111 if(!write_metadata_block_header_(tempfile, &status, node->data)) {
2112 chain->status = get_equivalent_status_(status);
2115 if(!write_metadata_block_data_(tempfile, &status, node->data)) {
2116 chain->status = get_equivalent_status_(status);
2120 /*FLAC__ASSERT(fflush(), ftell() == chain->last_offset);*/
2122 /* copy the file postfix (everything after the metadata) */
2123 if(0 != fseek(f, chain->last_offset, SEEK_SET)) {
2124 cleanup_tempfile_(&tempfile, &tempfilename);
2125 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
2128 if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) {
2129 cleanup_tempfile_(&tempfile, &tempfilename);
2130 chain->status = get_equivalent_status_(status);
2134 /* move the tempfile on top of the original */
2136 if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status))
2142 void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator)
2144 FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH);
2145 iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth];
2149 FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator)
2151 FLAC__ASSERT(iterator->depth > 0);
2153 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2154 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2158 return read_metadata_block_header_(iterator);
2161 unsigned seek_to_first_metadata_block_(FILE *f)
2163 FLAC__byte buffer[4];
2167 FLAC__ASSERT(0 != f);
2168 FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == 4);
2170 /* skip any id3v2 tag */
2171 #if !defined _MSC_VER && !defined __MINGW32__
2172 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
2175 n = fread(buffer, 1, 4, f);
2176 #if !defined _MSC_VER && !defined __MINGW32__
2177 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
2184 else if(0 == memcmp(buffer, "ID3", 3)) {
2185 unsigned tag_length = 0;
2187 /* skip to the tag length */
2188 if(fseek(f, 2, SEEK_CUR) < 0)
2191 /* read the length */
2192 for(i = 0; i < 4; i++) {
2193 if(fread(buffer, 1, 1, f) < 1 || buffer[0] & 0x80)
2196 tag_length |= (buffer[0] & 0x7f);
2199 /* skip the rest of the tag */
2200 if(fseek(f, tag_length, SEEK_CUR) < 0)
2203 /* read the stream sync code */
2204 #if !defined _MSC_VER && !defined __MINGW32__
2205 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
2208 n = fread(buffer, 1, 4, f);
2209 #if !defined _MSC_VER && !defined __MINGW32__
2210 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
2219 /* check for the fLaC signature */
2220 if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH))
2226 FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append)
2228 const long offset_end = append? iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length : iterator->offset[iterator->depth];
2230 if(0 != fseek(iterator->file, 0, SEEK_SET)) {
2231 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2234 if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) {
2235 cleanup_tempfile_(tempfile, tempfilename);
2238 if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) {
2239 cleanup_tempfile_(tempfile, tempfilename);
2246 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)
2248 long save_offset = iterator->offset[iterator->depth]; /*@@@ 2G limit */
2249 FLAC__ASSERT(0 != *tempfile);
2251 if(0 != fseek(iterator->file, save_offset + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length, SEEK_SET)) {
2252 cleanup_tempfile_(tempfile, tempfilename);
2253 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2256 if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) {
2257 cleanup_tempfile_(tempfile, tempfilename);
2261 if(fixup_is_last_code != 0) {
2263 * if code == 1, it means a block was appended to the end so
2264 * we have to clear the is_last flag of the previous block
2265 * if code == -1, it means the last block was deleted so
2266 * we have to set the is_last flag of the previous block
2268 /*@@@ MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */
2270 if(0 != fseek(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
2271 cleanup_tempfile_(tempfile, tempfilename);
2272 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2275 if(fread(&x, 1, 1, *tempfile) != 1) {
2276 cleanup_tempfile_(tempfile, tempfilename);
2277 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2280 if(fixup_is_last_code > 0) {
2281 FLAC__ASSERT(x & 0x80);
2285 FLAC__ASSERT(!(x & 0x80));
2288 if(0 != fseek(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
2289 cleanup_tempfile_(tempfile, tempfilename);
2290 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2293 if(local__fwrite(&x, 1, 1, *tempfile) != 1) {
2294 cleanup_tempfile_(tempfile, tempfilename);
2295 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2300 (void)fclose(iterator->file);
2302 if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status))
2305 if(iterator->has_stats)
2306 set_file_stats_(iterator->filename, &iterator->stats);
2308 if(!simple_iterator_prime_input_(iterator, !iterator->is_writable))
2311 while(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length < save_offset)
2312 if(!FLAC__metadata_simple_iterator_next(iterator))
2317 /* move the iterator to it's original block faster by faking a push, then doing a pop_ */
2318 FLAC__ASSERT(iterator->depth == 0);
2319 iterator->offset[0] = save_offset;
2321 return simple_iterator_pop_(iterator);
2325 FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, unsigned bytes/*@@@ 4G limit*/, FLAC__Metadata_SimpleIteratorStatus *status)
2327 FLAC__byte buffer[8192];
2331 n = min(sizeof(buffer), bytes);
2332 if(fread(buffer, 1, n, file) != n) {
2333 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2336 if(local__fwrite(buffer, 1, n, tempfile) != n) {
2337 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2346 FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status)
2348 FLAC__byte buffer[8192];
2351 while(!feof(file)) {
2352 n = fread(buffer, 1, sizeof(buffer), file);
2353 if(n == 0 && !feof(file)) {
2354 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2357 if(n > 0 && local__fwrite(buffer, 1, n, tempfile) != n) {
2358 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2366 FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
2368 static const char *tempfile_suffix = ".metadata_edit";
2369 if(0 == tempfile_path_prefix) {
2370 if(0 == (*tempfilename = (char*)malloc(strlen(filename) + strlen(tempfile_suffix) + 1))) {
2371 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2374 strcpy(*tempfilename, filename);
2375 strcat(*tempfilename, tempfile_suffix);
2378 const char *p = strrchr(filename, '/');
2384 if(0 == (*tempfilename = (char*)malloc(strlen(tempfile_path_prefix) + 1 + strlen(p) + strlen(tempfile_suffix) + 1))) {
2385 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2388 strcpy(*tempfilename, tempfile_path_prefix);
2389 strcat(*tempfilename, "/");
2390 strcat(*tempfilename, p);
2391 strcat(*tempfilename, tempfile_suffix);
2394 if(0 == (*tempfile = fopen(*tempfilename, "w+b"))) {
2395 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
2402 FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
2404 FLAC__ASSERT(0 != filename);
2405 FLAC__ASSERT(0 != tempfile);
2406 FLAC__ASSERT(0 != *tempfile);
2407 FLAC__ASSERT(0 != tempfilename);
2408 FLAC__ASSERT(0 != *tempfilename);
2409 FLAC__ASSERT(0 != status);
2411 (void)fclose(*tempfile);
2414 #if defined _MSC_VER || defined __MINGW32__
2415 if(unlink(filename) < 0) {
2416 cleanup_tempfile_(tempfile, tempfilename);
2417 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR;
2422 /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just rename(): */
2423 if(0 != rename(*tempfilename, filename)) {
2424 cleanup_tempfile_(tempfile, tempfilename);
2425 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR;
2429 cleanup_tempfile_(tempfile, tempfilename);
2434 void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
2436 if(0 != *tempfile) {
2437 (void)fclose(*tempfile);
2441 if(0 != *tempfilename) {
2442 (void)unlink(*tempfilename);
2443 free(*tempfilename);
2448 FLAC__bool get_file_stats_(const char *filename, struct stat *stats)
2450 FLAC__ASSERT(0 != filename);
2451 FLAC__ASSERT(0 != stats);
2452 return (0 == stat(filename, stats));
2455 void set_file_stats_(const char *filename, struct stat *stats)
2457 struct utimbuf srctime;
2459 FLAC__ASSERT(0 != filename);
2460 FLAC__ASSERT(0 != stats);
2462 srctime.actime = stats->st_atime;
2463 srctime.modtime = stats->st_mtime;
2464 (void)chmod(filename, stats->st_mode);
2465 (void)utime(filename, &srctime);
2466 #if !defined _MSC_VER && !defined __MINGW32__
2467 (void)chown(filename, stats->st_uid, -1);
2468 (void)chown(filename, -1, stats->st_gid);
2472 FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status)
2475 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK:
2476 return FLAC__METADATA_CHAIN_STATUS_OK;
2477 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
2478 return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT;
2479 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
2480 return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
2481 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
2482 return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
2483 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE:
2484 return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE;
2485 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA:
2486 return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
2487 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR:
2488 return FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
2489 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR:
2490 return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
2491 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR:
2492 return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
2493 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR:
2494 return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR;
2495 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR:
2496 return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR;
2497 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR:
2498 return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
2499 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR:
2501 return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;