Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1 | /* libFLAC - Free Lossless Audio Codec library |
| 2 | * Copyright (C) 2001,2002 Josh Coalson |
| 3 | * |
| 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. |
| 8 | * |
| 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. |
| 13 | * |
| 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. |
| 18 | */ |
| 19 | |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 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 */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 22 | #include <errno.h> |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 23 | #endif |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
| 27 | |
| 28 | #if defined _MSC_VER || defined __MINGW32__ |
| 29 | #include <sys/utime.h> /* for utime() */ |
| 30 | #include <io.h> /* for chmod() */ |
| 31 | #else |
| 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() */ |
| 35 | #endif |
| 36 | #include <sys/stat.h> /* for stat(), maybe chmod() */ |
| 37 | |
Josh Coalson | 90ced91 | 2002-05-30 05:23:38 +0000 | [diff] [blame] | 38 | #include "private/metadata.h" |
| 39 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 40 | #include "FLAC/assert.h" |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 41 | #include "FLAC/file_decoder.h" |
| 42 | |
| 43 | #ifdef max |
| 44 | #undef max |
| 45 | #endif |
| 46 | #define max(a,b) ((a)>(b)?(a):(b)) |
| 47 | #ifdef min |
| 48 | #undef min |
| 49 | #endif |
| 50 | #define min(a,b) ((a)<(b)?(a):(b)) |
| 51 | |
| 52 | |
| 53 | /**************************************************************************** |
| 54 | * |
| 55 | * Local function declarations |
| 56 | * |
| 57 | ***************************************************************************/ |
| 58 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 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); |
| 65 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 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); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 74 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 75 | static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block); |
| 76 | static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block); |
| 77 | static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_streaminfo_(FILE *file, const FLAC__StreamMetadata_StreamInfo *block); |
| 78 | static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_padding_(FILE *file, const FLAC__StreamMetadata_Padding *block, unsigned block_length); |
| 79 | static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_application_(FILE *file, const FLAC__StreamMetadata_Application *block, unsigned block_length); |
| 80 | static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_seektable_(FILE *file, const FLAC__StreamMetadata_SeekTable *block); |
| 81 | static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_vorbis_comment_(FILE *file, const FLAC__StreamMetadata_VorbisComment *block); |
| 82 | static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block); |
| 83 | static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last); |
| 84 | static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 85 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 86 | static FLAC__bool chain_rewrite_chain_(FLAC__Metadata_Chain *chain); |
| 87 | static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 88 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 89 | static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator); |
| 90 | static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 91 | |
| 92 | /* return 0 if OK, 1 if read error, 2 if not a FLAC file */ |
| 93 | static unsigned seek_to_first_metadata_block_(FILE *f); |
| 94 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 95 | static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append); |
| 96 | 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); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 97 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 98 | static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, unsigned bytes/*@@@ 4G limit*/, FLAC__Metadata_SimpleIteratorStatus *status); |
| 99 | static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 100 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 101 | static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status); |
| 102 | static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 103 | static void cleanup_tempfile_(FILE **tempfile, char **tempfilename); |
| 104 | |
| 105 | static FLAC__bool get_file_stats_(const char *filename, struct stat *stats); |
| 106 | static void set_file_stats_(const char *filename, struct stat *stats); |
| 107 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 108 | static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 109 | |
| 110 | |
| 111 | /**************************************************************************** |
| 112 | * |
| 113 | * Level 0 implementation |
| 114 | * |
| 115 | ***************************************************************************/ |
| 116 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 117 | static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data); |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 118 | static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 119 | static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data); |
| 120 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 121 | typedef struct { |
| 122 | FLAC__bool got_error; |
| 123 | FLAC__bool got_streaminfo; |
Josh Coalson | 999be3b | 2002-06-10 04:42:35 +0000 | [diff] [blame] | 124 | FLAC__StreamMetadata *streaminfo; |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 125 | } level0_client_data; |
| 126 | |
Josh Coalson | 999be3b | 2002-06-10 04:42:35 +0000 | [diff] [blame] | 127 | FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 128 | { |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 129 | level0_client_data cd; |
Josh Coalson | 9b86c96 | 2002-07-10 07:11:15 +0000 | [diff] [blame] | 130 | FLAC__FileDecoder *decoder; |
| 131 | |
| 132 | FLAC__ASSERT(0 != filename); |
| 133 | FLAC__ASSERT(0 != streaminfo); |
| 134 | |
| 135 | decoder = FLAC__file_decoder_new(); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 136 | |
| 137 | if(0 == decoder) |
| 138 | return false; |
| 139 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 140 | cd.got_error = false; |
| 141 | cd.got_streaminfo = false; |
| 142 | cd.streaminfo = streaminfo; |
| 143 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 144 | FLAC__file_decoder_set_md5_checking(decoder, false); |
| 145 | FLAC__file_decoder_set_filename(decoder, filename); |
| 146 | FLAC__file_decoder_set_write_callback(decoder, write_callback_); |
| 147 | FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_); |
| 148 | FLAC__file_decoder_set_error_callback(decoder, error_callback_); |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 149 | FLAC__file_decoder_set_client_data(decoder, &cd); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 150 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 151 | if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK || cd.got_error) { |
| 152 | FLAC__file_decoder_finish(decoder); |
| 153 | FLAC__file_decoder_delete(decoder); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 154 | return false; |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 155 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 156 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 157 | if(!FLAC__file_decoder_process_metadata(decoder) || cd.got_error) { |
| 158 | FLAC__file_decoder_finish(decoder); |
| 159 | FLAC__file_decoder_delete(decoder); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 160 | return false; |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 161 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 162 | |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 163 | FLAC__file_decoder_finish(decoder); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 164 | FLAC__file_decoder_delete(decoder); |
| 165 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 166 | return !cd.got_error && cd.got_streaminfo; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 167 | } |
| 168 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 169 | FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 170 | { |
| 171 | (void)decoder, (void)frame, (void)buffer, (void)client_data; |
| 172 | |
Josh Coalson | 2835f43 | 2002-06-04 05:54:44 +0000 | [diff] [blame] | 173 | return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 174 | } |
| 175 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 176 | void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 177 | { |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 178 | level0_client_data *cd = (level0_client_data *)client_data; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 179 | (void)decoder; |
| 180 | |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 181 | if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO && 0 != cd->streaminfo) { |
Josh Coalson | 999be3b | 2002-06-10 04:42:35 +0000 | [diff] [blame] | 182 | *(cd->streaminfo) = *metadata; |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 183 | cd->got_streaminfo = true; |
| 184 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) |
| 188 | { |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 189 | level0_client_data *cd = (level0_client_data *)client_data; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 190 | (void)decoder; |
| 191 | |
Josh Coalson | 2835f43 | 2002-06-04 05:54:44 +0000 | [diff] [blame] | 192 | if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC) |
Josh Coalson | 57ba6f4 | 2002-06-07 05:27:37 +0000 | [diff] [blame] | 193 | cd->got_error = true; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 194 | } |
| 195 | |
| 196 | |
| 197 | /**************************************************************************** |
| 198 | * |
| 199 | * Level 1 implementation |
| 200 | * |
| 201 | ***************************************************************************/ |
| 202 | |
| 203 | #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4) |
| 204 | /* 1 for initial offset, +4 for our own personal use */ |
| 205 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 206 | struct FLAC__Metadata_SimpleIterator { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 207 | FILE *file; |
| 208 | char *filename, *tempfile_path_prefix; |
| 209 | struct stat stats; |
| 210 | FLAC__bool has_stats; |
| 211 | FLAC__bool is_writable; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 212 | FLAC__Metadata_SimpleIteratorStatus status; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 213 | /*@@@ 2G limits here because of the offset type: */ |
| 214 | long offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH]; |
| 215 | long first_offset; /* this is the offset to the STREAMINFO block */ |
| 216 | unsigned depth; |
| 217 | /* this is the metadata block header of the current block we are pointing to: */ |
| 218 | FLAC__bool is_last; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 219 | FLAC__MetadataType type; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 220 | unsigned length; |
| 221 | }; |
| 222 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 223 | const char * const FLAC__Metadata_SimpleIteratorStatusString[] = { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 224 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK", |
| 225 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT", |
| 226 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE", |
| 227 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE", |
| 228 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE", |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 229 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA", |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 230 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR", |
| 231 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR", |
| 232 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR", |
| 233 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR", |
| 234 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR", |
| 235 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR", |
| 236 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR" |
| 237 | }; |
| 238 | |
| 239 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 240 | FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new() |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 241 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 242 | FLAC__Metadata_SimpleIterator *iterator = malloc(sizeof(FLAC__Metadata_SimpleIterator)); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 243 | |
| 244 | if(0 != iterator) { |
| 245 | iterator->file = 0; |
| 246 | iterator->filename = 0; |
| 247 | iterator->tempfile_path_prefix = 0; |
| 248 | iterator->has_stats = false; |
| 249 | iterator->is_writable = false; |
| 250 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 251 | iterator->first_offset = iterator->offset[0] = -1; |
| 252 | iterator->depth = 0; |
| 253 | } |
| 254 | |
| 255 | return iterator; |
| 256 | } |
| 257 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 258 | static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 259 | { |
| 260 | FLAC__ASSERT(0 != iterator); |
| 261 | |
| 262 | if(0 != iterator->file) { |
| 263 | fclose(iterator->file); |
| 264 | iterator->file = 0; |
| 265 | if(iterator->has_stats) |
| 266 | set_file_stats_(iterator->filename, &iterator->stats); |
| 267 | } |
| 268 | if(0 != iterator->filename) { |
| 269 | free(iterator->filename); |
| 270 | iterator->filename = 0; |
| 271 | } |
| 272 | if(0 != iterator->tempfile_path_prefix) { |
| 273 | free(iterator->tempfile_path_prefix); |
| 274 | iterator->tempfile_path_prefix = 0; |
| 275 | } |
| 276 | } |
| 277 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 278 | void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 279 | { |
| 280 | FLAC__ASSERT(0 != iterator); |
| 281 | |
| 282 | simple_iterator_free_guts_(iterator); |
| 283 | free(iterator); |
| 284 | } |
| 285 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 286 | FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 287 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 288 | FLAC__Metadata_SimpleIteratorStatus status; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 289 | |
| 290 | FLAC__ASSERT(0 != iterator); |
| 291 | |
| 292 | status = iterator->status; |
| 293 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 294 | return status; |
| 295 | } |
| 296 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 297 | static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 298 | { |
| 299 | unsigned ret; |
| 300 | |
| 301 | FLAC__ASSERT(0 != iterator); |
| 302 | |
| 303 | iterator->is_writable = false; |
| 304 | |
| 305 | if(0 == (iterator->file = fopen(iterator->filename, "r+b"))) { |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 306 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 307 | /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 308 | if(errno == EACCES) { |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 309 | #endif |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 310 | if(0 == (iterator->file = fopen(iterator->filename, "rb"))) { |
| 311 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE; |
| 312 | return false; |
| 313 | } |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 314 | #if !defined _MSC_VER && !defined __MINGW32__ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 315 | } |
| 316 | else { |
| 317 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE; |
| 318 | return false; |
| 319 | } |
Josh Coalson | 60b205c | 2002-07-03 07:40:07 +0000 | [diff] [blame] | 320 | #endif |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 321 | } |
| 322 | else { |
| 323 | iterator->is_writable = true; |
| 324 | } |
| 325 | |
| 326 | ret = seek_to_first_metadata_block_(iterator->file); |
| 327 | switch(ret) { |
| 328 | case 0: |
| 329 | iterator->depth = 0; |
| 330 | iterator->first_offset = iterator->offset[iterator->depth] = ftell(iterator->file); |
| 331 | return read_metadata_block_header_(iterator); |
| 332 | case 1: |
| 333 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 334 | return false; |
| 335 | case 2: |
| 336 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE; |
| 337 | return false; |
| 338 | default: |
| 339 | FLAC__ASSERT(0); |
| 340 | return false; |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | #if 0 |
| 345 | @@@ If we decide to finish implementing this, put this comment back in metadata.h |
| 346 | /* |
| 347 | * The 'tempfile_path_prefix' allows you to specify a directory where |
| 348 | * tempfiles should go. Remember that if your metadata edits cause the |
| 349 | * FLAC file to grow, the entire file will have to be rewritten. If |
| 350 | * 'tempfile_path_prefix' is NULL, the temp file will be written in the |
| 351 | * same directory as the original FLAC file. This makes replacing the |
| 352 | * original with the tempfile fast but requires extra space in the same |
| 353 | * partition for the tempfile. If space is a problem, you can pass a |
| 354 | * directory name belonging to a different partition in |
| 355 | * 'tempfile_path_prefix'. Note that you should use the forward slash |
| 356 | * '/' as the directory separator. A trailing slash is not needed; it |
| 357 | * will be added automatically. |
| 358 | */ |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 359 | FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 360 | #endif |
| 361 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 362 | FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 363 | { |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 364 | const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'rename(...)' for what it will take to finish implementing this */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 365 | |
| 366 | FLAC__ASSERT(0 != iterator); |
| 367 | FLAC__ASSERT(0 != filename); |
| 368 | |
| 369 | simple_iterator_free_guts_(iterator); |
| 370 | |
| 371 | if(preserve_file_stats) |
| 372 | iterator->has_stats = get_file_stats_(filename, &iterator->stats); |
| 373 | |
| 374 | if(0 == (iterator->filename = strdup(filename))) { |
| 375 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 376 | return false; |
| 377 | } |
| 378 | if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) { |
| 379 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 380 | return false; |
| 381 | } |
| 382 | |
| 383 | return simple_iterator_prime_input_(iterator); |
| 384 | } |
| 385 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 386 | FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 387 | { |
| 388 | FLAC__ASSERT(0 != iterator); |
| 389 | FLAC__ASSERT(0 != iterator->file); |
| 390 | |
| 391 | return iterator->is_writable; |
| 392 | } |
| 393 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 394 | FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 395 | { |
| 396 | FLAC__ASSERT(0 != iterator); |
| 397 | FLAC__ASSERT(0 != iterator->file); |
| 398 | |
| 399 | if(iterator->is_last) |
| 400 | return false; |
| 401 | |
| 402 | if(0 != fseek(iterator->file, iterator->length, SEEK_CUR)) { |
| 403 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 404 | return false; |
| 405 | } |
| 406 | |
| 407 | iterator->offset[iterator->depth] = ftell(iterator->file); |
| 408 | |
| 409 | return read_metadata_block_header_(iterator); |
| 410 | } |
| 411 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 412 | FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 413 | { |
| 414 | long this_offset; |
| 415 | |
| 416 | FLAC__ASSERT(0 != iterator); |
| 417 | FLAC__ASSERT(0 != iterator->file); |
| 418 | |
| 419 | if(iterator->offset[iterator->depth] == iterator->first_offset) |
| 420 | return false; |
| 421 | |
| 422 | if(0 != fseek(iterator->file, iterator->first_offset, SEEK_SET)) { |
| 423 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 424 | return false; |
| 425 | } |
| 426 | this_offset = iterator->first_offset; |
| 427 | if(!read_metadata_block_header_(iterator)) |
| 428 | return false; |
| 429 | |
| 430 | /* we ignore any error from ftell() and catch it in fseek() */ |
| 431 | while(ftell(iterator->file) + (long)iterator->length < iterator->offset[iterator->depth]) { |
| 432 | if(0 != fseek(iterator->file, iterator->length, SEEK_CUR)) { |
| 433 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 434 | return false; |
| 435 | } |
| 436 | this_offset = ftell(iterator->file); |
| 437 | if(!read_metadata_block_header_(iterator)) |
| 438 | return false; |
| 439 | } |
| 440 | |
| 441 | iterator->offset[iterator->depth] = this_offset; |
| 442 | |
| 443 | return true; |
| 444 | } |
| 445 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 446 | FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 447 | { |
| 448 | FLAC__ASSERT(0 != iterator); |
| 449 | FLAC__ASSERT(0 != iterator->file); |
| 450 | |
| 451 | return iterator->type; |
| 452 | } |
| 453 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 454 | FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 455 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 456 | FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 457 | |
| 458 | FLAC__ASSERT(0 != iterator); |
| 459 | FLAC__ASSERT(0 != iterator->file); |
| 460 | |
| 461 | if(0 != block) { |
| 462 | block->is_last = iterator->is_last; |
| 463 | block->length = iterator->length; |
| 464 | |
| 465 | if(!read_metadata_block_data_(iterator, block)) { |
| 466 | FLAC__metadata_object_delete(block); |
| 467 | return 0; |
| 468 | } |
| 469 | |
| 470 | /* back up to the beginning of the block data to stay consistent */ |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 471 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 472 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 473 | FLAC__metadata_object_delete(block); |
| 474 | return 0; |
| 475 | } |
| 476 | } |
| 477 | else |
| 478 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 479 | |
| 480 | return block; |
| 481 | } |
| 482 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 483 | FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 484 | { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 485 | FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth];) |
| 486 | FLAC__bool ret; |
| 487 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 488 | FLAC__ASSERT(0 != iterator); |
| 489 | FLAC__ASSERT(0 != iterator->file); |
Josh Coalson | d8ab346 | 2002-07-11 05:54:05 +0000 | [diff] [blame^] | 490 | FLAC__ASSERT(0 != block); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 491 | |
| 492 | if(!iterator->is_writable) { |
| 493 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE; |
| 494 | return false; |
| 495 | } |
| 496 | |
| 497 | if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) { |
| 498 | if(iterator->type != block->type) { |
| 499 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT; |
| 500 | return false; |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | block->is_last = iterator->is_last; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 505 | |
| 506 | if(iterator->length == block->length) |
| 507 | return write_metadata_block_stationary_(iterator, block); |
| 508 | else if(iterator->length > block->length) { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 509 | if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) { |
| 510 | ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 511 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 512 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 513 | return ret; |
| 514 | } |
| 515 | else { |
| 516 | ret = rewrite_whole_file_(iterator, block, /*append=*/false); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 517 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 518 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 519 | return ret; |
| 520 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 521 | } |
| 522 | else /* iterator->length < block->length */ { |
| 523 | unsigned padding_leftover = 0; |
| 524 | FLAC__bool padding_is_last = false; |
| 525 | if(use_padding) { |
| 526 | /* first see if we can even use padding */ |
| 527 | if(iterator->is_last) { |
| 528 | use_padding = false; |
| 529 | } |
| 530 | else { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 531 | const unsigned extra_padding_bytes_required = block->length - iterator->length; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 532 | simple_iterator_push_(iterator); |
| 533 | if(!FLAC__metadata_simple_iterator_next(iterator)) { |
| 534 | (void)simple_iterator_pop_(iterator); |
| 535 | return false; |
| 536 | } |
| 537 | if(iterator->type != FLAC__METADATA_TYPE_PADDING) { |
| 538 | use_padding = false; |
| 539 | } |
| 540 | else { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 541 | if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 542 | padding_leftover = 0; |
| 543 | block->is_last = iterator->is_last; |
| 544 | } |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 545 | else if(iterator->length < extra_padding_bytes_required) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 546 | use_padding = false; |
| 547 | else { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 548 | padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 549 | padding_is_last = iterator->is_last; |
| 550 | block->is_last = false; |
| 551 | } |
| 552 | } |
| 553 | if(!simple_iterator_pop_(iterator)) |
| 554 | return false; |
| 555 | } |
| 556 | } |
| 557 | if(use_padding) { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 558 | if(padding_leftover == 0) { |
| 559 | ret = write_metadata_block_stationary_(iterator, block); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 560 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 561 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 562 | return ret; |
| 563 | } |
| 564 | else { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 565 | FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH); |
| 566 | ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 567 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 568 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 569 | return ret; |
| 570 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 571 | } |
| 572 | else { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 573 | ret = rewrite_whole_file_(iterator, block, /*append=*/false); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 574 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 575 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 576 | return ret; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 577 | } |
| 578 | } |
| 579 | } |
| 580 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 581 | FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 582 | { |
| 583 | unsigned padding_leftover = 0; |
| 584 | FLAC__bool padding_is_last = false; |
| 585 | |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 586 | FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;) |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 587 | FLAC__bool ret; |
| 588 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 589 | FLAC__ASSERT(0 != iterator); |
| 590 | FLAC__ASSERT(0 != iterator->file); |
Josh Coalson | d8ab346 | 2002-07-11 05:54:05 +0000 | [diff] [blame^] | 591 | FLAC__ASSERT(0 != block); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 592 | |
| 593 | if(!iterator->is_writable) |
| 594 | return false; |
| 595 | |
| 596 | if(block->type == FLAC__METADATA_TYPE_STREAMINFO) { |
| 597 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT; |
| 598 | return false; |
| 599 | } |
| 600 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 601 | block->is_last = iterator->is_last; |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 602 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 603 | if(use_padding) { |
| 604 | /* first see if we can even use padding */ |
| 605 | if(iterator->is_last) { |
| 606 | use_padding = false; |
| 607 | } |
| 608 | else { |
| 609 | simple_iterator_push_(iterator); |
| 610 | if(!FLAC__metadata_simple_iterator_next(iterator)) { |
| 611 | (void)simple_iterator_pop_(iterator); |
| 612 | return false; |
| 613 | } |
| 614 | if(iterator->type != FLAC__METADATA_TYPE_PADDING) { |
| 615 | use_padding = false; |
| 616 | } |
| 617 | else { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 618 | if(iterator->length == block->length) { |
| 619 | padding_leftover = 0; |
| 620 | block->is_last = iterator->is_last; |
| 621 | } |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 622 | else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 623 | use_padding = false; |
| 624 | else { |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 625 | padding_leftover = iterator->length - block->length; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 626 | padding_is_last = iterator->is_last; |
| 627 | block->is_last = false; |
| 628 | } |
| 629 | } |
| 630 | if(!simple_iterator_pop_(iterator)) |
| 631 | return false; |
| 632 | } |
| 633 | } |
| 634 | if(use_padding) { |
| 635 | /* move to the next block, which is suitable padding */ |
| 636 | if(!FLAC__metadata_simple_iterator_next(iterator)) |
| 637 | return false; |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 638 | if(padding_leftover == 0) { |
| 639 | ret = write_metadata_block_stationary_(iterator, block); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 640 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 641 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 642 | return ret; |
| 643 | } |
| 644 | else { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 645 | FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH); |
| 646 | ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 647 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 648 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 649 | return ret; |
| 650 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 651 | } |
| 652 | else { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 653 | ret = rewrite_whole_file_(iterator, block, /*append=*/true); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 654 | FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 655 | FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 656 | return ret; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 657 | } |
| 658 | } |
| 659 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 660 | FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 661 | { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 662 | FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth];) |
| 663 | FLAC__bool ret; |
| 664 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 665 | if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) { |
| 666 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT; |
| 667 | return false; |
| 668 | } |
| 669 | |
| 670 | if(use_padding) { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 671 | FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 672 | if(0 == padding) { |
| 673 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 674 | return false; |
| 675 | } |
| 676 | padding->length = iterator->length; |
| 677 | if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) { |
| 678 | FLAC__metadata_object_delete(padding); |
| 679 | return false; |
| 680 | } |
| 681 | FLAC__metadata_object_delete(padding); |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 682 | if(!FLAC__metadata_simple_iterator_prev(iterator)) |
| 683 | return false; |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 684 | FLAC__ASSERT(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length == debug_target_offset); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 685 | FLAC__ASSERT(ftell(iterator->file) + (long)iterator->length == debug_target_offset); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 686 | return true; |
| 687 | } |
| 688 | else { |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 689 | ret = rewrite_whole_file_(iterator, 0, /*append=*/false); |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 690 | FLAC__ASSERT(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length == debug_target_offset); |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 691 | FLAC__ASSERT(ftell(iterator->file) + (long)iterator->length == debug_target_offset); |
| 692 | return ret; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 693 | } |
| 694 | } |
| 695 | |
| 696 | |
| 697 | |
| 698 | /**************************************************************************** |
| 699 | * |
| 700 | * Level 2 implementation |
| 701 | * |
| 702 | ***************************************************************************/ |
| 703 | |
| 704 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 705 | typedef struct FLAC__Metadata_Node { |
| 706 | FLAC__StreamMetadata *data; |
| 707 | struct FLAC__Metadata_Node *prev, *next; |
| 708 | } FLAC__Metadata_Node; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 709 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 710 | struct FLAC__Metadata_Chain { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 711 | char *filename; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 712 | FLAC__Metadata_Node *head; |
| 713 | FLAC__Metadata_Node *tail; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 714 | unsigned nodes; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 715 | FLAC__Metadata_ChainStatus status; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 716 | long first_offset, last_offset; /*@@@ 2G limit */ |
| 717 | /* |
| 718 | * This is the length of the chain initially read from the FLAC file. |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 719 | * it is used to compare against the current length to decide whether |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 720 | * or not the whole file has to be rewritten. |
| 721 | */ |
| 722 | unsigned initial_length; /*@@@ 4G limit */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 723 | }; |
| 724 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 725 | struct FLAC__Metadata_Iterator { |
| 726 | FLAC__Metadata_Chain *chain; |
| 727 | FLAC__Metadata_Node *current; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 728 | }; |
| 729 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 730 | const char * const FLAC__Metadata_ChainStatusString[] = { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 731 | "FLAC__METADATA_CHAIN_STATUS_OK", |
| 732 | "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT", |
| 733 | "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE", |
| 734 | "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE", |
| 735 | "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE", |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 736 | "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA", |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 737 | "FLAC__METADATA_CHAIN_STATUS_READ_ERROR", |
| 738 | "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR", |
| 739 | "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR", |
| 740 | "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR", |
| 741 | "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR", |
| 742 | "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR", |
| 743 | "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR" |
| 744 | }; |
| 745 | |
| 746 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 747 | static FLAC__Metadata_Node *node_new_() |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 748 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 749 | FLAC__Metadata_Node *node = (FLAC__Metadata_Node*)malloc(sizeof(FLAC__Metadata_Node)); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 750 | if(0 != node) |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 751 | memset(node, 0, sizeof(FLAC__Metadata_Node)); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 752 | return node; |
| 753 | } |
| 754 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 755 | static void node_delete_(FLAC__Metadata_Node *node) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 756 | { |
| 757 | FLAC__ASSERT(0 != node); |
| 758 | if(0 != node->data) |
| 759 | FLAC__metadata_object_delete(node->data); |
| 760 | free(node); |
| 761 | } |
| 762 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 763 | static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 764 | { |
| 765 | FLAC__ASSERT(0 != chain); |
| 766 | FLAC__ASSERT(0 != node); |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 767 | FLAC__ASSERT(0 != node->data); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 768 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 769 | node->next = node->prev = 0; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 770 | node->data->is_last = true; |
| 771 | if(0 != chain->tail) |
| 772 | chain->tail->data->is_last = false; |
| 773 | |
| 774 | if(0 == chain->head) |
| 775 | chain->head = node; |
| 776 | else { |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 777 | FLAC__ASSERT(0 != chain->tail); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 778 | chain->tail->next = node; |
| 779 | node->prev = chain->tail; |
| 780 | } |
| 781 | chain->tail = node; |
| 782 | chain->nodes++; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 783 | } |
| 784 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 785 | static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 786 | { |
| 787 | FLAC__ASSERT(0 != chain); |
| 788 | FLAC__ASSERT(0 != node); |
| 789 | |
| 790 | if(node == chain->head) |
| 791 | chain->head = node->next; |
| 792 | else |
| 793 | node->prev->next = node->next; |
| 794 | |
| 795 | if(node == chain->tail) |
| 796 | chain->tail = node->prev; |
| 797 | else |
| 798 | node->next->prev = node->prev; |
| 799 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 800 | if(0 != chain->tail) |
| 801 | chain->tail->data->is_last = true; |
| 802 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 803 | chain->nodes--; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 804 | } |
| 805 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 806 | static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 807 | { |
| 808 | chain_remove_node_(chain, node); |
| 809 | node_delete_(node); |
| 810 | } |
| 811 | |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 812 | static unsigned chain_calculate_length_(FLAC__Metadata_Chain *chain) |
| 813 | { |
| 814 | const FLAC__Metadata_Node *node; |
| 815 | unsigned length = 0; |
| 816 | for(node = chain->head; node; node = node->next) |
| 817 | length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length); |
| 818 | return length; |
| 819 | } |
| 820 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 821 | static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 822 | { |
| 823 | FLAC__ASSERT(0 != node); |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 824 | FLAC__ASSERT(0 != node->data); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 825 | FLAC__ASSERT(0 != iterator); |
| 826 | FLAC__ASSERT(0 != iterator->current); |
| 827 | FLAC__ASSERT(0 != iterator->chain); |
| 828 | FLAC__ASSERT(0 != iterator->chain->head); |
| 829 | FLAC__ASSERT(0 != iterator->chain->tail); |
| 830 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 831 | node->data->is_last = false; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 832 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 833 | node->prev = iterator->current->prev; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 834 | node->next = iterator->current; |
| 835 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 836 | if(0 == node->prev) |
| 837 | iterator->chain->head = node; |
| 838 | else |
| 839 | node->prev->next = node; |
| 840 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 841 | iterator->current->prev = node; |
| 842 | |
| 843 | iterator->chain->nodes++; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 844 | } |
| 845 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 846 | static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 847 | { |
| 848 | FLAC__ASSERT(0 != node); |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 849 | FLAC__ASSERT(0 != node->data); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 850 | FLAC__ASSERT(0 != iterator); |
| 851 | FLAC__ASSERT(0 != iterator->current); |
| 852 | FLAC__ASSERT(0 != iterator->chain); |
| 853 | FLAC__ASSERT(0 != iterator->chain->head); |
| 854 | FLAC__ASSERT(0 != iterator->chain->tail); |
| 855 | |
| 856 | iterator->current->data->is_last = false; |
| 857 | |
| 858 | node->prev = iterator->current; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 859 | node->next = iterator->current->next; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 860 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 861 | if(0 == node->next) |
| 862 | iterator->chain->tail = node; |
| 863 | else |
| 864 | node->next->prev = node; |
| 865 | |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 866 | node->prev->next = node; |
| 867 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 868 | iterator->chain->tail->data->is_last = true; |
| 869 | |
| 870 | iterator->chain->nodes++; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 871 | } |
| 872 | |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 873 | /* return true iff node and node->next are both padding */ |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 874 | static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node) |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 875 | { |
| 876 | if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 877 | const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 878 | node->data->length += growth; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 879 | |
| 880 | chain_delete_node_(chain, node->next); |
| 881 | return true; |
| 882 | } |
| 883 | else |
| 884 | return false; |
| 885 | } |
| 886 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 887 | FLAC__Metadata_Chain *FLAC__metadata_chain_new() |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 888 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 889 | FLAC__Metadata_Chain *chain = malloc(sizeof(FLAC__Metadata_Chain)); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 890 | |
| 891 | if(0 != chain) { |
| 892 | chain->filename = 0; |
| 893 | chain->head = chain->tail = 0; |
| 894 | chain->nodes = 0; |
| 895 | chain->status = FLAC__METADATA_CHAIN_STATUS_OK; |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 896 | chain->initial_length = 0; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 897 | } |
| 898 | |
| 899 | return chain; |
| 900 | } |
| 901 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 902 | void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 903 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 904 | FLAC__Metadata_Node *node, *next; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 905 | |
| 906 | FLAC__ASSERT(0 != chain); |
| 907 | |
| 908 | for(node = chain->head; node; ) { |
| 909 | next = node->next; |
| 910 | node_delete_(node); |
| 911 | node = next; |
| 912 | } |
| 913 | |
| 914 | if(0 != chain->filename) |
| 915 | free(chain->filename); |
| 916 | |
| 917 | free(chain); |
| 918 | } |
| 919 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 920 | FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 921 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 922 | FLAC__Metadata_ChainStatus status; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 923 | |
| 924 | FLAC__ASSERT(0 != chain); |
| 925 | |
| 926 | status = chain->status; |
| 927 | chain->status = FLAC__METADATA_CHAIN_STATUS_OK; |
| 928 | return status; |
| 929 | } |
| 930 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 931 | FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 932 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 933 | FLAC__Metadata_SimpleIterator *iterator; |
| 934 | FLAC__Metadata_Node *node; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 935 | |
| 936 | FLAC__ASSERT(0 != chain); |
| 937 | FLAC__ASSERT(0 != filename); |
| 938 | |
| 939 | if(0 == (chain->filename = strdup(filename))) { |
| 940 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 941 | return false; |
| 942 | } |
| 943 | |
| 944 | if(0 == (iterator = FLAC__metadata_simple_iterator_new())) { |
| 945 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 946 | return false; |
| 947 | } |
| 948 | |
| 949 | if(!FLAC__metadata_simple_iterator_init(iterator, filename, /*preserve_file_stats=*/false)) { |
| 950 | chain->status = get_equivalent_status_(iterator->status); |
| 951 | return false; |
| 952 | } |
| 953 | |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 954 | chain->first_offset = iterator->offset[iterator->depth]; |
| 955 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 956 | do { |
| 957 | node = node_new_(); |
| 958 | if(0 == node) { |
| 959 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 960 | return false; |
| 961 | } |
| 962 | node->data = FLAC__metadata_simple_iterator_get_block(iterator); |
| 963 | if(0 == node->data) { |
| 964 | node_delete_(node); |
| 965 | chain->status = get_equivalent_status_(iterator->status); |
| 966 | return false; |
| 967 | } |
| 968 | chain_append_node_(chain, node); |
| 969 | } while(FLAC__metadata_simple_iterator_next(iterator)); |
| 970 | |
| 971 | if(!iterator->is_last || iterator->status != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK) { |
| 972 | chain->status = get_equivalent_status_(iterator->status); |
| 973 | return false; |
| 974 | } |
| 975 | |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 976 | chain->last_offset = ftell(iterator->file) + iterator->length; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 977 | FLAC__metadata_simple_iterator_delete(iterator); |
| 978 | |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 979 | chain->initial_length = chain_calculate_length_(chain); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 980 | return true; |
| 981 | } |
| 982 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 983 | FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 984 | { |
| 985 | struct stat stats; |
| 986 | const char *tempfile_path_prefix = 0; |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 987 | unsigned current_length; |
| 988 | |
| 989 | FLAC__ASSERT(0 != chain); |
| 990 | |
| 991 | current_length = chain_calculate_length_(chain); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 992 | |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 993 | if(use_padding) { |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 994 | if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) { |
| 995 | const unsigned delta = chain->initial_length - current_length; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 996 | chain->tail->data->length += delta; |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 997 | current_length += delta; |
| 998 | FLAC__ASSERT(current_length == chain->initial_length); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 999 | } |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1000 | else if(current_length + FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1001 | FLAC__StreamMetadata *padding; |
| 1002 | FLAC__Metadata_Node *node; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1003 | if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) { |
| 1004 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1005 | return false; |
| 1006 | } |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1007 | padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length); |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1008 | if(0 == (node = node_new_())) { |
| 1009 | FLAC__metadata_object_delete(padding); |
| 1010 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1011 | return false; |
| 1012 | } |
| 1013 | node->data = padding; |
| 1014 | chain_append_node_(chain, node); |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1015 | current_length = chain_calculate_length_(chain); |
| 1016 | FLAC__ASSERT(current_length == chain->initial_length); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1017 | } |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1018 | else if(current_length > chain->initial_length) { |
| 1019 | const unsigned delta = current_length - chain->initial_length; |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1020 | if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1021 | if(chain->tail->data->length + FLAC__STREAM_METADATA_HEADER_LENGTH == delta) { |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1022 | chain_delete_node_(chain, chain->tail); |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1023 | current_length = chain_calculate_length_(chain); |
| 1024 | FLAC__ASSERT(current_length == chain->initial_length); |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1025 | } |
Josh Coalson | e2ba10f | 2002-05-14 06:03:17 +0000 | [diff] [blame] | 1026 | else if(chain->tail->data->length >= delta) { |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1027 | chain->tail->data->length -= delta; |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1028 | current_length -= delta; |
| 1029 | FLAC__ASSERT(current_length == chain->initial_length); |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1030 | } |
| 1031 | } |
| 1032 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1033 | } |
| 1034 | |
| 1035 | if(preserve_file_stats) |
| 1036 | get_file_stats_(chain->filename, &stats); |
| 1037 | |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1038 | if(current_length == chain->initial_length) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1039 | if(!chain_rewrite_chain_(chain)) |
| 1040 | return false; |
| 1041 | } |
| 1042 | else { |
| 1043 | if(!chain_rewrite_file_(chain, tempfile_path_prefix)) |
| 1044 | return false; |
| 1045 | } |
| 1046 | |
| 1047 | if(preserve_file_stats) |
| 1048 | set_file_stats_(chain->filename, &stats); |
| 1049 | |
Josh Coalson | e2ba10f | 2002-05-14 06:03:17 +0000 | [diff] [blame] | 1050 | /* recompute lengths and offsets if necessary */ |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1051 | if(chain->initial_length != current_length) { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1052 | const FLAC__Metadata_Node *node; |
Josh Coalson | 3ecb117 | 2002-06-15 05:09:47 +0000 | [diff] [blame] | 1053 | chain->initial_length = current_length; |
Josh Coalson | e2ba10f | 2002-05-14 06:03:17 +0000 | [diff] [blame] | 1054 | chain->last_offset = chain->first_offset; |
| 1055 | for(node = chain->head; node; node = node->next) |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1056 | chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length); |
Josh Coalson | e2ba10f | 2002-05-14 06:03:17 +0000 | [diff] [blame] | 1057 | } |
| 1058 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1059 | return true; |
| 1060 | } |
| 1061 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1062 | void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1063 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1064 | FLAC__Metadata_Node *node; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1065 | |
| 1066 | FLAC__ASSERT(0 != chain); |
| 1067 | |
| 1068 | for(node = chain->head; node; ) { |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1069 | if(!chain_merge_adjacent_padding_(chain, node)) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1070 | node = node->next; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1071 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1072 | } |
| 1073 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1074 | void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1075 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1076 | FLAC__Metadata_Node *node, *save; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1077 | unsigned i; |
| 1078 | |
| 1079 | FLAC__ASSERT(0 != chain); |
| 1080 | |
| 1081 | /* |
| 1082 | * Don't try and be too smart... this simple algo is good enough for |
| 1083 | * the small number of nodes that we deal with. |
| 1084 | */ |
| 1085 | for(i = 0, node = chain->head; i < chain->nodes; i++) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1086 | if(node->data->type == FLAC__METADATA_TYPE_PADDING) { |
| 1087 | save = node->next; |
| 1088 | chain_remove_node_(chain, node); |
| 1089 | chain_append_node_(chain, node); |
| 1090 | node = save; |
| 1091 | } |
| 1092 | else { |
| 1093 | node = node->next; |
| 1094 | } |
| 1095 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1096 | |
| 1097 | FLAC__metadata_chain_merge_padding(chain); |
| 1098 | } |
| 1099 | |
| 1100 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1101 | FLAC__Metadata_Iterator *FLAC__metadata_iterator_new() |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1102 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1103 | FLAC__Metadata_Iterator *iterator = malloc(sizeof(FLAC__Metadata_Iterator)); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1104 | |
| 1105 | if(0 != iterator) { |
| 1106 | iterator->current = 0; |
| 1107 | iterator->chain = 0; |
| 1108 | } |
| 1109 | |
| 1110 | return iterator; |
| 1111 | } |
| 1112 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1113 | void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1114 | { |
| 1115 | FLAC__ASSERT(0 != iterator); |
| 1116 | |
| 1117 | free(iterator); |
| 1118 | } |
| 1119 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1120 | void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1121 | { |
| 1122 | FLAC__ASSERT(0 != iterator); |
| 1123 | FLAC__ASSERT(0 != chain); |
| 1124 | FLAC__ASSERT(0 != chain->head); |
| 1125 | |
| 1126 | iterator->chain = chain; |
| 1127 | iterator->current = chain->head; |
| 1128 | } |
| 1129 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1130 | FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1131 | { |
| 1132 | FLAC__ASSERT(0 != iterator); |
| 1133 | |
| 1134 | if(0 == iterator->current || 0 == iterator->current->next) |
| 1135 | return false; |
| 1136 | |
| 1137 | iterator->current = iterator->current->next; |
| 1138 | return true; |
| 1139 | } |
| 1140 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1141 | FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1142 | { |
| 1143 | FLAC__ASSERT(0 != iterator); |
| 1144 | |
| 1145 | if(0 == iterator->current || 0 == iterator->current->prev) |
| 1146 | return false; |
| 1147 | |
| 1148 | iterator->current = iterator->current->prev; |
| 1149 | return true; |
| 1150 | } |
| 1151 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1152 | FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1153 | { |
| 1154 | FLAC__ASSERT(0 != iterator); |
| 1155 | FLAC__ASSERT(0 != iterator->current); |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1156 | FLAC__ASSERT(0 != iterator->current->data); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1157 | |
| 1158 | return iterator->current->data->type; |
| 1159 | } |
| 1160 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1161 | FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1162 | { |
| 1163 | FLAC__ASSERT(0 != iterator); |
| 1164 | FLAC__ASSERT(0 != iterator->current); |
| 1165 | |
| 1166 | return iterator->current->data; |
| 1167 | } |
| 1168 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1169 | FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block) |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1170 | { |
Josh Coalson | 9b86c96 | 2002-07-10 07:11:15 +0000 | [diff] [blame] | 1171 | FLAC__ASSERT(0 != iterator); |
| 1172 | FLAC__ASSERT(0 != block); |
Josh Coalson | 2745fe7 | 2002-05-11 05:31:56 +0000 | [diff] [blame] | 1173 | return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block); |
| 1174 | } |
| 1175 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1176 | FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1177 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1178 | FLAC__Metadata_Node *save; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1179 | |
| 1180 | FLAC__ASSERT(0 != iterator); |
| 1181 | FLAC__ASSERT(0 != iterator->current); |
| 1182 | |
| 1183 | if(0 == iterator->current->prev) { |
| 1184 | FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO); |
| 1185 | return false; |
| 1186 | } |
| 1187 | |
| 1188 | save = iterator->current->prev; |
| 1189 | |
| 1190 | if(replace_with_padding) { |
Josh Coalson | 90ced91 | 2002-05-30 05:23:38 +0000 | [diff] [blame] | 1191 | FLAC__metadata_object_delete_data(iterator->current->data); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1192 | iterator->current->data->type = FLAC__METADATA_TYPE_PADDING; |
| 1193 | } |
| 1194 | else { |
| 1195 | chain_delete_node_(iterator->chain, iterator->current); |
| 1196 | } |
| 1197 | |
| 1198 | iterator->current = save; |
| 1199 | return true; |
| 1200 | } |
| 1201 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1202 | FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1203 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1204 | FLAC__Metadata_Node *node; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1205 | |
| 1206 | FLAC__ASSERT(0 != iterator); |
| 1207 | FLAC__ASSERT(0 != iterator->current); |
Josh Coalson | 9b86c96 | 2002-07-10 07:11:15 +0000 | [diff] [blame] | 1208 | FLAC__ASSERT(0 != block); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1209 | |
| 1210 | if(block->type == FLAC__METADATA_TYPE_STREAMINFO) |
| 1211 | return false; |
| 1212 | |
| 1213 | if(0 == iterator->current->prev) { |
| 1214 | FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO); |
| 1215 | return false; |
| 1216 | } |
| 1217 | |
| 1218 | if(0 == (node = node_new_())) |
| 1219 | return false; |
| 1220 | |
| 1221 | node->data = block; |
| 1222 | iterator_insert_node_(iterator, node); |
| 1223 | iterator->current = node; |
| 1224 | return true; |
| 1225 | } |
| 1226 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1227 | FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1228 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1229 | FLAC__Metadata_Node *node; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1230 | |
| 1231 | FLAC__ASSERT(0 != iterator); |
| 1232 | FLAC__ASSERT(0 != iterator->current); |
Josh Coalson | 9b86c96 | 2002-07-10 07:11:15 +0000 | [diff] [blame] | 1233 | FLAC__ASSERT(0 != block); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1234 | |
| 1235 | if(block->type == FLAC__METADATA_TYPE_STREAMINFO) |
| 1236 | return false; |
| 1237 | |
| 1238 | if(0 == (node = node_new_())) |
| 1239 | return false; |
| 1240 | |
| 1241 | node->data = block; |
| 1242 | iterator_insert_node_after_(iterator, node); |
| 1243 | iterator->current = node; |
| 1244 | return true; |
| 1245 | } |
| 1246 | |
| 1247 | |
| 1248 | /**************************************************************************** |
| 1249 | * |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1250 | * Local function definitions |
| 1251 | * |
| 1252 | ***************************************************************************/ |
| 1253 | |
| 1254 | void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes) |
| 1255 | { |
| 1256 | unsigned i; |
| 1257 | |
| 1258 | b += bytes; |
| 1259 | |
| 1260 | for(i = 0; i < bytes; i++) { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1261 | *(--b) = (FLAC__byte)(val & 0xff); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1262 | val >>= 8; |
| 1263 | } |
| 1264 | } |
| 1265 | |
| 1266 | void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes) |
| 1267 | { |
| 1268 | unsigned i; |
| 1269 | |
| 1270 | for(i = 0; i < bytes; i++) { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1271 | *(b++) = (FLAC__byte)(val & 0xff); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1272 | val >>= 8; |
| 1273 | } |
| 1274 | } |
| 1275 | |
| 1276 | void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes) |
| 1277 | { |
| 1278 | unsigned i; |
| 1279 | |
| 1280 | b += bytes; |
| 1281 | |
| 1282 | for(i = 0; i < bytes; i++) { |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1283 | *(--b) = (FLAC__byte)(val & 0xff); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1284 | val >>= 8; |
| 1285 | } |
| 1286 | } |
| 1287 | |
| 1288 | FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes) |
| 1289 | { |
| 1290 | FLAC__uint32 ret = 0; |
| 1291 | unsigned i; |
| 1292 | |
| 1293 | for(i = 0; i < bytes; i++) |
| 1294 | ret = (ret << 8) | (FLAC__uint32)(*b++); |
| 1295 | |
| 1296 | return ret; |
| 1297 | } |
| 1298 | |
| 1299 | FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes) |
| 1300 | { |
| 1301 | FLAC__uint32 ret = 0; |
| 1302 | unsigned i; |
| 1303 | |
| 1304 | b += bytes; |
| 1305 | |
| 1306 | for(i = 0; i < bytes; i++) |
| 1307 | ret = (ret << 8) | (FLAC__uint32)(*--b); |
| 1308 | |
| 1309 | return ret; |
| 1310 | } |
| 1311 | |
| 1312 | FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes) |
| 1313 | { |
| 1314 | FLAC__uint64 ret = 0; |
| 1315 | unsigned i; |
| 1316 | |
| 1317 | for(i = 0; i < bytes; i++) |
| 1318 | ret = (ret << 8) | (FLAC__uint64)(*b++); |
| 1319 | |
| 1320 | return ret; |
| 1321 | } |
| 1322 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1323 | FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1324 | { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1325 | FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH]; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1326 | |
| 1327 | FLAC__ASSERT(0 != iterator); |
| 1328 | FLAC__ASSERT(0 != iterator->file); |
| 1329 | |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1330 | if(fread(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, iterator->file) != FLAC__STREAM_METADATA_HEADER_LENGTH) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1331 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1332 | return false; |
| 1333 | } |
| 1334 | |
| 1335 | iterator->is_last = raw_header[0] & 0x80? true : false; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1336 | iterator->type = (FLAC__MetadataType)(raw_header[0] & 0x7f); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1337 | iterator->length = unpack_uint32_(raw_header + 1, 3); |
| 1338 | |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1339 | /* do some checking */ |
| 1340 | if(iterator->type > FLAC__METADATA_TYPE_VORBIS_COMMENT) { |
| 1341 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA; |
| 1342 | return false; |
| 1343 | } |
| 1344 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1345 | return true; |
| 1346 | } |
| 1347 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1348 | FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1349 | { |
| 1350 | FLAC__ASSERT(0 != iterator); |
| 1351 | FLAC__ASSERT(0 != iterator->file); |
| 1352 | |
| 1353 | switch(block->type) { |
| 1354 | case FLAC__METADATA_TYPE_STREAMINFO: |
| 1355 | iterator->status = read_metadata_block_data_streaminfo_(iterator->file, &block->data.stream_info); |
| 1356 | break; |
| 1357 | case FLAC__METADATA_TYPE_PADDING: |
| 1358 | iterator->status = read_metadata_block_data_padding_(iterator->file, &block->data.padding, block->length); |
| 1359 | break; |
| 1360 | case FLAC__METADATA_TYPE_APPLICATION: |
| 1361 | iterator->status = read_metadata_block_data_application_(iterator->file, &block->data.application, block->length); |
| 1362 | break; |
| 1363 | case FLAC__METADATA_TYPE_SEEKTABLE: |
| 1364 | iterator->status = read_metadata_block_data_seektable_(iterator->file, &block->data.seek_table, block->length); |
| 1365 | break; |
| 1366 | case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| 1367 | iterator->status = read_metadata_block_data_vorbis_comment_(iterator->file, &block->data.vorbis_comment); |
| 1368 | break; |
| 1369 | default: |
| 1370 | FLAC__ASSERT(0); |
| 1371 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR; |
| 1372 | } |
| 1373 | |
| 1374 | return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK); |
| 1375 | } |
| 1376 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1377 | FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_(FILE *file, FLAC__StreamMetadata_StreamInfo *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1378 | { |
| 1379 | FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b; |
| 1380 | |
| 1381 | FLAC__ASSERT(0 != file); |
| 1382 | |
| 1383 | if(fread(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, file) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH) |
| 1384 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1385 | |
| 1386 | b = buffer; |
| 1387 | |
| 1388 | /* @@@ we are using hardcoded numbers for simplicity but we should |
| 1389 | * probably eventually write a bit-level unpacker and use the |
| 1390 | * _STREAMINFO_ constants. |
| 1391 | */ |
| 1392 | block->min_blocksize = unpack_uint32_(b, 2); b += 2; |
| 1393 | block->max_blocksize = unpack_uint32_(b, 2); b += 2; |
| 1394 | block->min_framesize = unpack_uint32_(b, 3); b += 3; |
| 1395 | block->max_framesize = unpack_uint32_(b, 3); b += 3; |
| 1396 | block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4); |
| 1397 | block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1; |
| 1398 | block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 1) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1; |
| 1399 | block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4); |
| 1400 | memcpy(block->md5sum, b+8, 16); |
| 1401 | |
| 1402 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1403 | } |
| 1404 | |
| 1405 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1406 | FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_(FILE *file, FLAC__StreamMetadata_Padding *block, unsigned block_length) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1407 | { |
| 1408 | FLAC__ASSERT(0 != file); |
| 1409 | |
| 1410 | (void)block; /* nothing to do; we don't care about reading the padding bytes */ |
| 1411 | |
| 1412 | if(0 != fseek(file, block_length, SEEK_CUR)) |
| 1413 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1414 | |
| 1415 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1416 | } |
| 1417 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1418 | FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_(FILE *file, FLAC__StreamMetadata_Application *block, unsigned block_length) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1419 | { |
| 1420 | const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8; |
| 1421 | |
| 1422 | FLAC__ASSERT(0 != file); |
| 1423 | |
| 1424 | if(fread(block->id, 1, id_bytes, file) != id_bytes) |
| 1425 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1426 | |
| 1427 | block_length -= id_bytes; |
| 1428 | |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1429 | if(block_length == 0) { |
| 1430 | block->data = 0; |
| 1431 | } |
| 1432 | else { |
| 1433 | if(0 == (block->data = malloc(block_length))) |
| 1434 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1435 | |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1436 | if(fread(block->data, 1, block_length, file) != block_length) |
| 1437 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1438 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1439 | |
| 1440 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1441 | } |
| 1442 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1443 | FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_(FILE *file, FLAC__StreamMetadata_SeekTable *block, unsigned block_length) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1444 | { |
| 1445 | unsigned i; |
| 1446 | FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH]; |
| 1447 | |
| 1448 | FLAC__ASSERT(0 != file); |
| 1449 | FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0); |
| 1450 | |
| 1451 | block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH; |
| 1452 | |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1453 | if(block->num_points == 0) |
| 1454 | block->points = 0; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1455 | else if(0 == (block->points = malloc(block->num_points * sizeof(FLAC__StreamMetadata_SeekPoint)))) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1456 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1457 | |
| 1458 | for(i = 0; i < block->num_points; i++) { |
| 1459 | if(fread(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, file) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH) |
| 1460 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1461 | /*@@@ some MAGIC NUMBERs here */ |
| 1462 | block->points[i].sample_number = unpack_uint64_(buffer, 8); |
| 1463 | block->points[i].stream_offset = unpack_uint64_(buffer+8, 8); |
| 1464 | block->points[i].frame_samples = unpack_uint32_(buffer+16, 2); |
| 1465 | } |
| 1466 | |
| 1467 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1468 | } |
| 1469 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1470 | FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_(FILE *file, FLAC__StreamMetadata_VorbisComment_Entry *entry) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1471 | { |
| 1472 | const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8; |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1473 | FLAC__byte buffer[4]; /* magic number is asserted below */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1474 | |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1475 | FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == 4); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1476 | FLAC__ASSERT(0 != file); |
| 1477 | |
| 1478 | if(fread(buffer, 1, entry_length_len, file) != entry_length_len) |
| 1479 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1480 | entry->length = unpack_uint32_little_endian_(buffer, entry_length_len); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1481 | |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1482 | if(entry->length == 0) { |
| 1483 | entry->entry = 0; |
| 1484 | } |
| 1485 | else { |
| 1486 | if(0 == (entry->entry = malloc(entry->length))) |
| 1487 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1488 | |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1489 | if(fread(entry->entry, 1, entry->length, file) != entry->length) |
| 1490 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1491 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1492 | |
| 1493 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1494 | } |
| 1495 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1496 | FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_(FILE *file, FLAC__StreamMetadata_VorbisComment *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1497 | { |
| 1498 | unsigned i; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1499 | FLAC__Metadata_SimpleIteratorStatus status; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1500 | const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8; |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1501 | FLAC__byte buffer[4]; /* magic number is asserted below */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1502 | |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1503 | FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == 4); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1504 | FLAC__ASSERT(0 != file); |
| 1505 | |
| 1506 | if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_(file, &(block->vendor_string)))) |
| 1507 | return status; |
| 1508 | |
| 1509 | if(fread(buffer, 1, num_comments_len, file) != num_comments_len) |
| 1510 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1511 | block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len); |
| 1512 | |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1513 | if(block->num_comments == 0) { |
| 1514 | block->comments = 0; |
| 1515 | } |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1516 | else if(0 == (block->comments = malloc(block->num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry)))) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1517 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1518 | |
| 1519 | for(i = 0; i < block->num_comments; i++) { |
| 1520 | if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_(file, block->comments + i))) |
| 1521 | return status; |
| 1522 | } |
| 1523 | |
| 1524 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1525 | } |
| 1526 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1527 | FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1528 | { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1529 | FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH]; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1530 | |
| 1531 | FLAC__ASSERT(0 != file); |
| 1532 | FLAC__ASSERT(0 != status); |
| 1533 | FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN)); |
| 1534 | |
| 1535 | buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type; |
| 1536 | pack_uint32_(block->length, buffer + 1, 3); |
| 1537 | |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 1538 | if(fwrite(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, file) != FLAC__STREAM_METADATA_HEADER_LENGTH) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1539 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1540 | return false; |
| 1541 | } |
| 1542 | |
| 1543 | return true; |
| 1544 | } |
| 1545 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1546 | FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1547 | { |
| 1548 | FLAC__ASSERT(0 != file); |
| 1549 | FLAC__ASSERT(0 != status); |
| 1550 | |
| 1551 | switch(block->type) { |
| 1552 | case FLAC__METADATA_TYPE_STREAMINFO: |
| 1553 | *status = write_metadata_block_data_streaminfo_(file, &block->data.stream_info); |
| 1554 | break; |
| 1555 | case FLAC__METADATA_TYPE_PADDING: |
| 1556 | *status = write_metadata_block_data_padding_(file, &block->data.padding, block->length); |
| 1557 | break; |
| 1558 | case FLAC__METADATA_TYPE_APPLICATION: |
| 1559 | *status = write_metadata_block_data_application_(file, &block->data.application, block->length); |
| 1560 | break; |
| 1561 | case FLAC__METADATA_TYPE_SEEKTABLE: |
| 1562 | *status = write_metadata_block_data_seektable_(file, &block->data.seek_table); |
| 1563 | break; |
| 1564 | case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| 1565 | *status = write_metadata_block_data_vorbis_comment_(file, &block->data.vorbis_comment); |
| 1566 | break; |
| 1567 | default: |
| 1568 | FLAC__ASSERT(0); |
| 1569 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR; |
| 1570 | } |
| 1571 | return (*status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK); |
| 1572 | } |
| 1573 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1574 | FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_streaminfo_(FILE *file, const FLAC__StreamMetadata_StreamInfo *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1575 | { |
| 1576 | FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH]; |
| 1577 | const unsigned channels1 = block->channels - 1; |
| 1578 | const unsigned bps1 = block->bits_per_sample - 1; |
| 1579 | |
| 1580 | FLAC__ASSERT(0 != file); |
| 1581 | |
| 1582 | /* @@@ we are using hardcoded numbers for simplicity but we should |
| 1583 | * probably eventually write a bit-level packer and use the |
| 1584 | * _STREAMINFO_ constants. |
| 1585 | */ |
| 1586 | pack_uint32_(block->min_blocksize, buffer, 2); |
| 1587 | pack_uint32_(block->max_blocksize, buffer+2, 2); |
| 1588 | pack_uint32_(block->min_framesize, buffer+4, 3); |
| 1589 | pack_uint32_(block->max_framesize, buffer+7, 3); |
| 1590 | buffer[10] = (block->sample_rate >> 12) & 0xff; |
| 1591 | buffer[11] = (block->sample_rate >> 4) & 0xff; |
| 1592 | buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4); |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1593 | buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f)); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1594 | pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4); |
| 1595 | memcpy(buffer+18, block->md5sum, 16); |
| 1596 | |
| 1597 | if(fwrite(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, file) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH) |
| 1598 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1599 | |
| 1600 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1601 | } |
| 1602 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1603 | FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_padding_(FILE *file, const FLAC__StreamMetadata_Padding *block, unsigned block_length) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1604 | { |
| 1605 | unsigned i, n = block_length; |
| 1606 | FLAC__byte buffer[1024]; |
| 1607 | |
| 1608 | FLAC__ASSERT(0 != file); |
| 1609 | |
| 1610 | (void)block; |
| 1611 | |
| 1612 | memset(buffer, 0, 1024); |
| 1613 | |
| 1614 | for(i = 0; i < n/1024; i++) |
| 1615 | if(fwrite(buffer, 1, 1024, file) != 1024) |
| 1616 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1617 | |
| 1618 | n %= 1024; |
| 1619 | |
| 1620 | if(fwrite(buffer, 1, n, file) != n) |
| 1621 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1622 | |
| 1623 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1624 | } |
| 1625 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1626 | FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_application_(FILE *file, const FLAC__StreamMetadata_Application *block, unsigned block_length) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1627 | { |
| 1628 | const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8; |
| 1629 | |
| 1630 | FLAC__ASSERT(0 != file); |
| 1631 | |
| 1632 | if(fwrite(block->id, 1, id_bytes, file) != id_bytes) |
| 1633 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1634 | |
| 1635 | block_length -= id_bytes; |
| 1636 | |
| 1637 | if(fwrite(block->data, 1, block_length, file) != block_length) |
| 1638 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1639 | |
| 1640 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1641 | } |
| 1642 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1643 | FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_seektable_(FILE *file, const FLAC__StreamMetadata_SeekTable *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1644 | { |
| 1645 | unsigned i; |
| 1646 | FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH]; |
| 1647 | |
| 1648 | FLAC__ASSERT(0 != file); |
| 1649 | |
| 1650 | for(i = 0; i < block->num_points; i++) { |
| 1651 | /*@@@ some MAGIC NUMBERs here */ |
| 1652 | pack_uint64_(block->points[i].sample_number, buffer, 8); |
| 1653 | pack_uint64_(block->points[i].stream_offset, buffer+8, 8); |
| 1654 | pack_uint32_(block->points[i].frame_samples, buffer+16, 2); |
| 1655 | if(fwrite(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, file) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH) |
| 1656 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1657 | } |
| 1658 | |
| 1659 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1660 | } |
| 1661 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1662 | FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_vorbis_comment_(FILE *file, const FLAC__StreamMetadata_VorbisComment *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1663 | { |
| 1664 | unsigned i; |
| 1665 | const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8; |
| 1666 | const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8; |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1667 | FLAC__byte buffer[4]; /* magic number is asserted below */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1668 | |
Josh Coalson | 7ee4d17 | 2002-06-01 06:31:27 +0000 | [diff] [blame] | 1669 | FLAC__ASSERT(max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == 4); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1670 | FLAC__ASSERT(0 != file); |
| 1671 | |
| 1672 | pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len); |
| 1673 | if(fwrite(buffer, 1, entry_length_len, file) != entry_length_len) |
| 1674 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1675 | if(fwrite(block->vendor_string.entry, 1, block->vendor_string.length, file) != block->vendor_string.length) |
| 1676 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1677 | |
| 1678 | pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len); |
| 1679 | if(fwrite(buffer, 1, num_comments_len, file) != num_comments_len) |
| 1680 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1681 | |
| 1682 | for(i = 0; i < block->num_comments; i++) { |
| 1683 | pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len); |
| 1684 | if(fwrite(buffer, 1, entry_length_len, file) != entry_length_len) |
| 1685 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1686 | if(fwrite(block->comments[i].entry, 1, block->comments[i].length, file) != block->comments[i].length) |
| 1687 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1688 | } |
| 1689 | |
| 1690 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1691 | } |
| 1692 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1693 | FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1694 | { |
| 1695 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 1696 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1697 | return false; |
| 1698 | } |
| 1699 | |
| 1700 | if(!write_metadata_block_header_(iterator->file, &iterator->status, block)) |
| 1701 | return false; |
| 1702 | |
| 1703 | if(!write_metadata_block_data_(iterator->file, &iterator->status, block)) |
| 1704 | return false; |
| 1705 | |
| 1706 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 1707 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1708 | return false; |
| 1709 | } |
| 1710 | |
| 1711 | return read_metadata_block_header_(iterator); |
| 1712 | } |
| 1713 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1714 | FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1715 | { |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1716 | FLAC__StreamMetadata *padding; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1717 | |
| 1718 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 1719 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1720 | return false; |
| 1721 | } |
| 1722 | |
| 1723 | block->is_last = false; |
| 1724 | |
| 1725 | if(!write_metadata_block_header_(iterator->file, &iterator->status, block)) |
| 1726 | return false; |
| 1727 | |
| 1728 | if(!write_metadata_block_data_(iterator->file, &iterator->status, block)) |
| 1729 | return false; |
| 1730 | |
| 1731 | if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) |
| 1732 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1733 | |
| 1734 | padding->is_last = padding_is_last; |
| 1735 | padding->length = padding_length; |
| 1736 | |
| 1737 | if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) { |
| 1738 | FLAC__metadata_object_delete(padding); |
| 1739 | return false; |
| 1740 | } |
| 1741 | |
| 1742 | if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) { |
| 1743 | FLAC__metadata_object_delete(padding); |
| 1744 | return false; |
| 1745 | } |
| 1746 | |
| 1747 | FLAC__metadata_object_delete(padding); |
| 1748 | |
| 1749 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 1750 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1751 | return false; |
| 1752 | } |
| 1753 | |
| 1754 | return read_metadata_block_header_(iterator); |
| 1755 | } |
| 1756 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1757 | FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1758 | { |
| 1759 | FILE *tempfile; |
| 1760 | char *tempfilename; |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 1761 | int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */ |
| 1762 | long fixup_is_last_flag_offset = -1; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1763 | |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 1764 | FLAC__ASSERT(0 != block || append == false); |
| 1765 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 1766 | if(iterator->is_last) { |
| 1767 | if(append) { |
| 1768 | fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */ |
| 1769 | fixup_is_last_flag_offset = iterator->offset[iterator->depth]; |
| 1770 | } |
| 1771 | else if(0 == block) { |
| 1772 | simple_iterator_push_(iterator); |
| 1773 | if(!FLAC__metadata_simple_iterator_prev(iterator)) { |
| 1774 | (void)simple_iterator_pop_(iterator); |
| 1775 | return false; |
| 1776 | } |
| 1777 | fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */ |
| 1778 | fixup_is_last_flag_offset = iterator->offset[iterator->depth]; |
| 1779 | if(!simple_iterator_pop_(iterator)) |
| 1780 | return false; |
| 1781 | } |
| 1782 | } |
| 1783 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1784 | if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append)) |
| 1785 | return false; |
| 1786 | |
| 1787 | if(0 != block) { |
| 1788 | if(!write_metadata_block_header_(tempfile, &iterator->status, block)) { |
| 1789 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 1790 | return false; |
| 1791 | } |
| 1792 | |
| 1793 | if(!write_metadata_block_data_(tempfile, &iterator->status, block)) { |
| 1794 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 1795 | return false; |
| 1796 | } |
| 1797 | } |
| 1798 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 1799 | if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0)) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1800 | return false; |
| 1801 | |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 1802 | if(append) |
| 1803 | return FLAC__metadata_simple_iterator_next(iterator); |
| 1804 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1805 | return true; |
| 1806 | } |
| 1807 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1808 | FLAC__bool chain_rewrite_chain_(FLAC__Metadata_Chain *chain) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1809 | { |
| 1810 | FILE *f; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1811 | FLAC__Metadata_Node *node; |
| 1812 | FLAC__Metadata_SimpleIteratorStatus status; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1813 | |
| 1814 | FLAC__ASSERT(0 != chain); |
| 1815 | FLAC__ASSERT(0 != chain->filename); |
| 1816 | FLAC__ASSERT(0 != chain->head); |
| 1817 | |
| 1818 | if(0 == (f = fopen(chain->filename, "r+b"))) { |
| 1819 | chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE; |
| 1820 | return false; |
| 1821 | } |
| 1822 | if(0 != fseek(f, chain->first_offset, SEEK_SET)) { |
| 1823 | chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR; |
| 1824 | return false; |
| 1825 | } |
| 1826 | |
| 1827 | for(node = chain->head; node; node = node->next) { |
| 1828 | if(!write_metadata_block_header_(f, &status, node->data)) { |
| 1829 | chain->status = get_equivalent_status_(status); |
| 1830 | return false; |
| 1831 | } |
| 1832 | if(!write_metadata_block_data_(f, &status, node->data)) { |
| 1833 | chain->status = get_equivalent_status_(status); |
| 1834 | return false; |
| 1835 | } |
| 1836 | } |
| 1837 | |
| 1838 | /*FLAC__ASSERT(fflush(), ftell() == chain->last_offset);*/ |
| 1839 | |
| 1840 | (void)fclose(f); |
| 1841 | |
| 1842 | return true; |
| 1843 | } |
| 1844 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1845 | FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1846 | { |
| 1847 | FILE *f, *tempfile; |
| 1848 | char *tempfilename; |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1849 | FLAC__Metadata_SimpleIteratorStatus status; |
| 1850 | const FLAC__Metadata_Node *node; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1851 | |
| 1852 | FLAC__ASSERT(0 != chain); |
| 1853 | FLAC__ASSERT(0 != chain->filename); |
| 1854 | FLAC__ASSERT(0 != chain->head); |
| 1855 | |
| 1856 | /* copy the file prefix (data up to first metadata block */ |
| 1857 | if(0 == (f = fopen(chain->filename, "rb"))) { |
| 1858 | chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE; |
| 1859 | return false; |
| 1860 | } |
| 1861 | if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) { |
| 1862 | chain->status = get_equivalent_status_(status); |
| 1863 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 1864 | return false; |
| 1865 | } |
| 1866 | if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) { |
| 1867 | chain->status = get_equivalent_status_(status); |
| 1868 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 1869 | return false; |
| 1870 | } |
| 1871 | |
| 1872 | /* write the metadata */ |
| 1873 | for(node = chain->head; node; node = node->next) { |
| 1874 | if(!write_metadata_block_header_(tempfile, &status, node->data)) { |
| 1875 | chain->status = get_equivalent_status_(status); |
| 1876 | return false; |
| 1877 | } |
| 1878 | if(!write_metadata_block_data_(tempfile, &status, node->data)) { |
| 1879 | chain->status = get_equivalent_status_(status); |
| 1880 | return false; |
| 1881 | } |
| 1882 | } |
| 1883 | /*FLAC__ASSERT(fflush(), ftell() == chain->last_offset);*/ |
| 1884 | |
| 1885 | /* copy the file postfix (everything after the metadata) */ |
| 1886 | if(0 != fseek(f, chain->last_offset, SEEK_SET)) { |
| 1887 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 1888 | chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR; |
| 1889 | return false; |
| 1890 | } |
| 1891 | if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) { |
| 1892 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 1893 | chain->status = get_equivalent_status_(status); |
| 1894 | return false; |
| 1895 | } |
| 1896 | |
| 1897 | /* move the tempfile on top of the original */ |
| 1898 | (void)fclose(f); |
| 1899 | if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status)) |
| 1900 | return false; |
| 1901 | |
| 1902 | return true; |
| 1903 | } |
| 1904 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1905 | void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1906 | { |
| 1907 | FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH); |
| 1908 | iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth]; |
| 1909 | iterator->depth++; |
| 1910 | } |
| 1911 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1912 | FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1913 | { |
| 1914 | FLAC__ASSERT(iterator->depth > 0); |
| 1915 | iterator->depth--; |
| 1916 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 1917 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1918 | return false; |
| 1919 | } |
| 1920 | |
| 1921 | return read_metadata_block_header_(iterator); |
| 1922 | } |
| 1923 | |
| 1924 | unsigned seek_to_first_metadata_block_(FILE *f) |
| 1925 | { |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1926 | FLAC__byte buffer[4]; |
| 1927 | size_t n; |
| 1928 | unsigned i; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1929 | |
| 1930 | FLAC__ASSERT(0 != f); |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1931 | FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == 4); |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1932 | |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1933 | /* skip any id3v2 tag */ |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1934 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 1935 | /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */ |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1936 | errno = 0; |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1937 | #endif |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1938 | n = fread(buffer, 1, 4, f); |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1939 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 1940 | /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */ |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1941 | if(errno) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1942 | return 1; |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1943 | else |
| 1944 | #endif |
| 1945 | if(n != 4) |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1946 | return 2; |
| 1947 | else if(0 == memcmp(buffer, "ID3", 3)) { |
| 1948 | unsigned tag_length = 0; |
| 1949 | |
| 1950 | /* skip to the tag length */ |
| 1951 | if(fseek(f, 2, SEEK_CUR) < 0) |
| 1952 | return 1; |
| 1953 | |
| 1954 | /* read the length */ |
| 1955 | for(i = 0; i < 4; i++) { |
| 1956 | if(fread(buffer, 1, 1, f) < 1 || buffer[0] & 0x80) |
| 1957 | return 1; |
| 1958 | tag_length <<= 7; |
| 1959 | tag_length |= (buffer[0] & 0x7f); |
| 1960 | } |
| 1961 | |
| 1962 | /* skip the rest of the tag */ |
| 1963 | if(fseek(f, tag_length, SEEK_CUR) < 0) |
| 1964 | return 1; |
| 1965 | |
| 1966 | /* read the stream sync code */ |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1967 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 1968 | /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */ |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1969 | errno = 0; |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1970 | #endif |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1971 | n = fread(buffer, 1, 4, f); |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1972 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 1973 | /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */ |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1974 | if(errno) |
| 1975 | return 1; |
Josh Coalson | b549c9b | 2002-06-13 07:00:36 +0000 | [diff] [blame] | 1976 | else |
| 1977 | #endif |
| 1978 | if(n != 4) |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1979 | return 2; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1980 | } |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 1981 | |
| 1982 | /* check for the fLaC signature */ |
| 1983 | if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH)) |
| 1984 | return 0; |
| 1985 | else |
| 1986 | return 2; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1987 | } |
| 1988 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 1989 | FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1990 | { |
Josh Coalson | 7294309 | 2002-05-22 05:35:43 +0000 | [diff] [blame] | 1991 | const long offset_end = append? iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length : iterator->offset[iterator->depth]; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 1992 | |
| 1993 | if(0 != fseek(iterator->file, 0, SEEK_SET)) { |
| 1994 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1995 | return false; |
| 1996 | } |
| 1997 | if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) { |
| 1998 | cleanup_tempfile_(tempfile, tempfilename); |
| 1999 | return false; |
| 2000 | } |
| 2001 | if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) { |
| 2002 | cleanup_tempfile_(tempfile, tempfilename); |
| 2003 | return false; |
| 2004 | } |
| 2005 | |
| 2006 | return true; |
| 2007 | } |
| 2008 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 2009 | 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) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2010 | { |
| 2011 | long save_offset = iterator->offset[iterator->depth]; /*@@@ 2G limit */ |
| 2012 | FLAC__ASSERT(0 != *tempfile); |
| 2013 | |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 2014 | if(0 != fseek(iterator->file, save_offset + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length, SEEK_SET)) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2015 | cleanup_tempfile_(tempfile, tempfilename); |
| 2016 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 2017 | return false; |
| 2018 | } |
| 2019 | if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) { |
| 2020 | cleanup_tempfile_(tempfile, tempfilename); |
| 2021 | return false; |
| 2022 | } |
| 2023 | |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 2024 | if(fixup_is_last_code != 0) { |
| 2025 | /* |
| 2026 | * if code == 1, it means a block was appended to the end so |
| 2027 | * we have to clear the is_last flag of the previous block |
| 2028 | * if code == -1, it means the last block was deleted so |
| 2029 | * we have to set the is_last flag of the previous block |
| 2030 | */ |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 2031 | /*@@@ MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */ |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2032 | FLAC__byte x; |
| 2033 | if(0 != fseek(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) { |
| 2034 | cleanup_tempfile_(tempfile, tempfilename); |
| 2035 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 2036 | return false; |
| 2037 | } |
| 2038 | if(fread(&x, 1, 1, *tempfile) != 1) { |
| 2039 | cleanup_tempfile_(tempfile, tempfilename); |
| 2040 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 2041 | return false; |
| 2042 | } |
Josh Coalson | 6b02a75 | 2002-05-10 06:42:02 +0000 | [diff] [blame] | 2043 | if(fixup_is_last_code > 0) { |
| 2044 | FLAC__ASSERT(x & 0x80); |
| 2045 | x &= 0x7f; |
| 2046 | } |
| 2047 | else { |
| 2048 | FLAC__ASSERT(!(x & 0x80)); |
| 2049 | x |= 0x80; |
| 2050 | } |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2051 | if(0 != fseek(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) { |
| 2052 | cleanup_tempfile_(tempfile, tempfilename); |
| 2053 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 2054 | return false; |
| 2055 | } |
| 2056 | if(fwrite(&x, 1, 1, *tempfile) != 1) { |
| 2057 | cleanup_tempfile_(tempfile, tempfilename); |
| 2058 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 2059 | return false; |
| 2060 | } |
| 2061 | } |
| 2062 | |
| 2063 | (void)fclose(iterator->file); |
| 2064 | |
| 2065 | if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status)) |
| 2066 | return false; |
| 2067 | |
| 2068 | if(iterator->has_stats) |
| 2069 | set_file_stats_(iterator->filename, &iterator->stats); |
| 2070 | |
| 2071 | if(!simple_iterator_prime_input_(iterator)) |
| 2072 | return false; |
| 2073 | if(backup) { |
Josh Coalson | eb643a2 | 2002-05-20 05:58:50 +0000 | [diff] [blame] | 2074 | while(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length < save_offset) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2075 | if(!FLAC__metadata_simple_iterator_next(iterator)) |
| 2076 | return false; |
| 2077 | return true; |
| 2078 | } |
| 2079 | else { |
| 2080 | /* move the iterator to it's original block faster by faking a push, then doing a pop_ */ |
| 2081 | FLAC__ASSERT(iterator->depth == 0); |
| 2082 | iterator->offset[0] = save_offset; |
| 2083 | iterator->depth++; |
| 2084 | return simple_iterator_pop_(iterator); |
| 2085 | } |
| 2086 | } |
| 2087 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 2088 | FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, unsigned bytes/*@@@ 4G limit*/, FLAC__Metadata_SimpleIteratorStatus *status) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2089 | { |
| 2090 | FLAC__byte buffer[8192]; |
| 2091 | unsigned n; |
| 2092 | |
| 2093 | while(bytes > 0) { |
| 2094 | n = min(sizeof(buffer), bytes); |
| 2095 | if(fread(buffer, 1, n, file) != n) { |
| 2096 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 2097 | return false; |
| 2098 | } |
| 2099 | if(fwrite(buffer, 1, n, tempfile) != n) { |
| 2100 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 2101 | return false; |
| 2102 | } |
| 2103 | bytes -= n; |
| 2104 | } |
| 2105 | |
| 2106 | return true; |
| 2107 | } |
| 2108 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 2109 | FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2110 | { |
| 2111 | FLAC__byte buffer[8192]; |
| 2112 | size_t n; |
| 2113 | |
| 2114 | while(!feof(file)) { |
| 2115 | n = fread(buffer, 1, sizeof(buffer), file); |
| 2116 | if(n == 0 && !feof(file)) { |
| 2117 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 2118 | return false; |
| 2119 | } |
| 2120 | if(n > 0 && fwrite(buffer, 1, n, tempfile) != n) { |
| 2121 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 2122 | return false; |
| 2123 | } |
| 2124 | } |
| 2125 | |
| 2126 | return true; |
| 2127 | } |
| 2128 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 2129 | FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2130 | { |
| 2131 | static const char *tempfile_suffix = ".metadata_edit"; |
| 2132 | if(0 == tempfile_path_prefix) { |
| 2133 | if(0 == (*tempfilename = malloc(strlen(filename) + strlen(tempfile_suffix) + 1))) { |
| 2134 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 2135 | return false; |
| 2136 | } |
| 2137 | strcpy(*tempfilename, filename); |
| 2138 | strcat(*tempfilename, tempfile_suffix); |
| 2139 | } |
| 2140 | else { |
| 2141 | const char *p = strrchr(filename, '/'); |
| 2142 | if(0 == p) |
| 2143 | p = filename; |
| 2144 | else |
| 2145 | p++; |
| 2146 | |
| 2147 | if(0 == (*tempfilename = malloc(strlen(tempfile_path_prefix) + 1 + strlen(p) + strlen(tempfile_suffix) + 1))) { |
| 2148 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 2149 | return false; |
| 2150 | } |
| 2151 | strcpy(*tempfilename, tempfile_path_prefix); |
| 2152 | strcat(*tempfilename, "/"); |
| 2153 | strcat(*tempfilename, p); |
| 2154 | strcat(*tempfilename, tempfile_suffix); |
| 2155 | } |
| 2156 | |
Josh Coalson | 51ee465 | 2002-05-09 05:46:23 +0000 | [diff] [blame] | 2157 | if(0 == (*tempfile = fopen(*tempfilename, "w+b"))) { |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2158 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE; |
| 2159 | return false; |
| 2160 | } |
| 2161 | |
| 2162 | return true; |
| 2163 | } |
| 2164 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 2165 | FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2166 | { |
| 2167 | FLAC__ASSERT(0 != filename); |
| 2168 | FLAC__ASSERT(0 != tempfile); |
| 2169 | FLAC__ASSERT(0 != *tempfile); |
| 2170 | FLAC__ASSERT(0 != tempfilename); |
| 2171 | FLAC__ASSERT(0 != *tempfilename); |
| 2172 | FLAC__ASSERT(0 != status); |
| 2173 | |
| 2174 | (void)fclose(*tempfile); |
| 2175 | *tempfile = 0; |
Josh Coalson | d57c8d3 | 2002-06-11 06:15:28 +0000 | [diff] [blame] | 2176 | |
| 2177 | #if defined _MSC_VER || defined __MINGW32__ |
| 2178 | if(unlink(filename) < 0) { |
| 2179 | cleanup_tempfile_(tempfile, tempfilename); |
| 2180 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR; |
| 2181 | return false; |
| 2182 | } |
| 2183 | #endif |
| 2184 | |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2185 | /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just rename(): */ |
| 2186 | if(0 != rename(*tempfilename, filename)) { |
| 2187 | cleanup_tempfile_(tempfile, tempfilename); |
| 2188 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR; |
| 2189 | return false; |
| 2190 | } |
| 2191 | |
| 2192 | cleanup_tempfile_(tempfile, tempfilename); |
| 2193 | |
| 2194 | return true; |
| 2195 | } |
| 2196 | |
| 2197 | void cleanup_tempfile_(FILE **tempfile, char **tempfilename) |
| 2198 | { |
| 2199 | if(0 != *tempfile) { |
| 2200 | (void)fclose(*tempfile); |
| 2201 | *tempfile = 0; |
| 2202 | } |
| 2203 | |
| 2204 | if(0 != *tempfilename) { |
| 2205 | (void)unlink(*tempfilename); |
| 2206 | free(*tempfilename); |
| 2207 | *tempfilename = 0; |
| 2208 | } |
| 2209 | } |
| 2210 | |
| 2211 | FLAC__bool get_file_stats_(const char *filename, struct stat *stats) |
| 2212 | { |
| 2213 | FLAC__ASSERT(0 != filename); |
| 2214 | FLAC__ASSERT(0 != stats); |
| 2215 | return (0 == stat(filename, stats)); |
| 2216 | } |
| 2217 | |
| 2218 | void set_file_stats_(const char *filename, struct stat *stats) |
| 2219 | { |
| 2220 | struct utimbuf srctime; |
| 2221 | |
| 2222 | FLAC__ASSERT(0 != filename); |
| 2223 | FLAC__ASSERT(0 != stats); |
| 2224 | |
| 2225 | srctime.actime = stats->st_atime; |
| 2226 | srctime.modtime = stats->st_mtime; |
| 2227 | (void)chmod(filename, stats->st_mode); |
| 2228 | (void)utime(filename, &srctime); |
| 2229 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 2230 | (void)chown(filename, stats->st_uid, -1); |
| 2231 | (void)chown(filename, -1, stats->st_gid); |
| 2232 | #endif |
| 2233 | } |
| 2234 | |
Josh Coalson | cc68251 | 2002-06-08 04:53:42 +0000 | [diff] [blame] | 2235 | FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status) |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2236 | { |
| 2237 | switch(status) { |
| 2238 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK: |
| 2239 | return FLAC__METADATA_CHAIN_STATUS_OK; |
| 2240 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT: |
| 2241 | return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT; |
| 2242 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE: |
| 2243 | return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE; |
| 2244 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE: |
| 2245 | return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE; |
| 2246 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE: |
| 2247 | return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE; |
Josh Coalson | a7b673c | 2002-05-25 02:13:38 +0000 | [diff] [blame] | 2248 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA: |
| 2249 | return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA; |
Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame] | 2250 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR: |
| 2251 | return FLAC__METADATA_CHAIN_STATUS_READ_ERROR; |
| 2252 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR: |
| 2253 | return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR; |
| 2254 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR: |
| 2255 | return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR; |
| 2256 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR: |
| 2257 | return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR; |
| 2258 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR: |
| 2259 | return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR; |
| 2260 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR: |
| 2261 | return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 2262 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR: |
| 2263 | default: |
| 2264 | return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; |
| 2265 | } |
| 2266 | } |