src/metaflac/options.c

   1 /* metaflac - Command-line FLAC metadata editor
   2  * Copyright (C) 2001,2002,2003,2004,2005,2006,2007,2008,2009  Josh Coalson
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program 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
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 #if HAVE_CONFIG_H
  20 #  include <config.h>
  21 #endif
  22
  23 #include "options.h"
  24 #include "usage.h"
  25 #include "utils.h"
  26 #include "FLAC/assert.h"
  27 #include "share/alloc.h"
  28 #include "share/compat.h"
  29 #include "share/grabbag/replaygain.h"
  30 #include <ctype.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34
  35 /*
  36    share__getopt format struct; note we don't use short options so we just
  37    set the 'val' field to 0 everywhere to indicate a valid option.
  38 */
  39 struct share__option long_options_[] = {
  40         /* global options */
  41         { "preserve-modtime", 0, 0, 0 },
  42         { "with-filename", 0, 0, 0 },
  43         { "no-filename", 0, 0, 0 },
  44         { "no-utf8-convert", 0, 0, 0 },
  45         { "dont-use-padding", 0, 0, 0 },
  46         { "no-cued-seekpoints", 0, 0, 0 },
  47         /* shorthand operations */
  48         { "show-md5sum", 0, 0, 0 },
  49         { "show-min-blocksize", 0, 0, 0 },
  50         { "show-max-blocksize", 0, 0, 0 },
  51         { "show-min-framesize", 0, 0, 0 },
  52         { "show-max-framesize", 0, 0, 0 },
  53         { "show-sample-rate", 0, 0, 0 },
  54         { "show-channels", 0, 0, 0 },
  55         { "show-bps", 0, 0, 0 },
  56         { "show-total-samples", 0, 0, 0 },
  57         { "set-md5sum", 1, 0, 0 }, /* undocumented */
  58         { "set-min-blocksize", 1, 0, 0 }, /* undocumented */
  59         { "set-max-blocksize", 1, 0, 0 }, /* undocumented */
  60         { "set-min-framesize", 1, 0, 0 }, /* undocumented */
  61         { "set-max-framesize", 1, 0, 0 }, /* undocumented */
  62         { "set-sample-rate", 1, 0, 0 }, /* undocumented */
  63         { "set-channels", 1, 0, 0 }, /* undocumented */
  64         { "set-bps", 1, 0, 0 }, /* undocumented */
  65         { "set-total-samples", 1, 0, 0 }, /* undocumented */ /* WATCHOUT: used by test/test_flac.sh on windows */
  66         { "show-vendor-tag", 0, 0, 0 },
  67         { "show-tag", 1, 0, 0 },
  68         { "remove-all-tags", 0, 0, 0 },
  69         { "remove-tag", 1, 0, 0 },
  70         { "remove-first-tag", 1, 0, 0 },
  71         { "set-tag", 1, 0, 0 },
  72         { "set-tag-from-file", 1, 0, 0 },
  73         { "import-tags-from", 1, 0, 0 },
  74         { "export-tags-to", 1, 0, 0 },
  75         { "import-cuesheet-from", 1, 0, 0 },
  76         { "export-cuesheet-to", 1, 0, 0 },
  77         { "import-picture-from", 1, 0, 0 },
  78         { "export-picture-to", 1, 0, 0 },
  79         { "add-seekpoint", 1, 0, 0 },
  80         { "add-replay-gain", 0, 0, 0 },
  81         { "remove-replay-gain", 0, 0, 0 },
  82         { "add-padding", 1, 0, 0 },
  83         /* major operations */
  84         { "help", 0, 0, 0 },
  85         { "version", 0, 0, 0 },
  86         { "list", 0, 0, 0 },
  87         { "append", 0, 0, 0 },
  88         { "remove", 0, 0, 0 },
  89         { "remove-all", 0, 0, 0 },
  90         { "merge-padding", 0, 0, 0 },
  91         { "sort-padding", 0, 0, 0 },
  92         /* major operation arguments */
  93         { "block-number", 1, 0, 0 },
  94         { "block-type", 1, 0, 0 },
  95         { "except-block-type", 1, 0, 0 },
  96         { "data-format", 1, 0, 0 },
  97         { "application-data-format", 1, 0, 0 },
  98         { "from-file", 1, 0, 0 },
  99         {0, 0, 0, 0}
 100 };
 101
 102 static FLAC__bool parse_option(int option_index, const char *option_argument, CommandLineOptions *options);
 103 static void append_new_operation(CommandLineOptions *options, Operation operation);
 104 static void append_new_argument(CommandLineOptions *options, Argument argument);
 105 static Operation *append_major_operation(CommandLineOptions *options, OperationType type);
 106 static Operation *append_shorthand_operation(CommandLineOptions *options, OperationType type);
 107 static Argument *find_argument(CommandLineOptions *options, ArgumentType type);
 108 static Operation *find_shorthand_operation(CommandLineOptions *options, OperationType type);
 109 static Argument *append_argument(CommandLineOptions *options, ArgumentType type);
 110 static FLAC__bool parse_md5(const char *src, FLAC__byte dest[16]);
 111 static FLAC__bool parse_uint32(const char *src, FLAC__uint32 *dest);
 112 static FLAC__bool parse_uint64(const char *src, FLAC__uint64 *dest);
 113 static FLAC__bool parse_string(const char *src, char **dest);
 114 static FLAC__bool parse_vorbis_comment_field_name(const char *field_ref, char **name, const char **violation);
 115 static FLAC__bool parse_add_seekpoint(const char *in, char **out, const char **violation);
 116 static FLAC__bool parse_add_padding(const char *in, unsigned *out);
 117 static FLAC__bool parse_block_number(const char *in, Argument_BlockNumber *out);
 118 static FLAC__bool parse_block_type(const char *in, Argument_BlockType *out);
 119 static FLAC__bool parse_data_format(const char *in, Argument_DataFormat *out);
 120 static FLAC__bool parse_application_data_format(const char *in, FLAC__bool *out);
 121 static void undocumented_warning(const char *opt);
 122
 123
 124 void init_options(CommandLineOptions *options)
 125 {
 126         options->preserve_modtime = false;
 127
 128         /* '2' is a hack to mean "use default if not forced on command line" */
 129         FLAC__ASSERT(true != 2);
 130         options->prefix_with_filename = 2;
 131
 132         options->utf8_convert = true;
 133         options->use_padding = true;
 134         options->cued_seekpoints = true;
 135         options->show_long_help = false;
 136         options->show_version = false;
 137         options->application_data_format_is_hexdump = false;
 138
 139         options->ops.operations = 0;
 140         options->ops.num_operations = 0;
 141         options->ops.capacity = 0;
 142
 143         options->args.arguments = 0;
 144         options->args.num_arguments = 0;
 145         options->args.capacity = 0;
 146
 147         options->args.checks.num_shorthand_ops = 0;
 148         options->args.checks.num_major_ops = 0;
 149         options->args.checks.has_block_type = false;
 150         options->args.checks.has_except_block_type = false;
 151
 152         options->num_files = 0;
 153         options->filenames = 0;
 154 }
 155
 156 FLAC__bool parse_options(int argc, char *argv[], CommandLineOptions *options)
 157 {
 158         int ret;
 159         int option_index = 1;
 160         FLAC__bool had_error = false;
 161
 162         while ((ret = share__getopt_long(argc, argv, "", long_options_, &option_index)) != -1) {
 163                 switch (ret) {
 164                         case 0:
 165                                 had_error |= !parse_option(option_index, share__optarg, options);
 166                                 break;
 167                         case '?':
 168                         case ':':
 169                                 had_error = true;
 170                                 break;
 171                         default:
 172                                 FLAC__ASSERT(0);
 173                                 break;
 174                 }
 175         }
 176
 177         if(options->prefix_with_filename == 2)
 178                 options->prefix_with_filename = (argc - share__optind > 1);
 179
 180         if(share__optind >= argc && !options->show_long_help && !options->show_version) {
 181                 fprintf(stderr,"ERROR: you must specify at least one FLAC file;\n");
 182                 fprintf(stderr,"       metaflac cannot be used as a pipe\n");
 183                 had_error = true;
 184         }
 185
 186         options->num_files = argc - share__optind;
 187
 188         if(options->num_files > 0) {
 189                 unsigned i = 0;
 190                 if(0 == (options->filenames = safe_malloc_mul_2op_(sizeof(char*), /*times*/options->num_files)))
 191                         die("out of memory allocating space for file names list");
 192                 while(share__optind < argc)
 193                         options->filenames[i++] = local_strdup(argv[share__optind++]);
 194         }
 195
 196         if(options->args.checks.num_major_ops > 0) {
 197                 if(options->args.checks.num_major_ops > 1) {
 198                         fprintf(stderr, "ERROR: you may only specify one major operation at a time\n");
 199                         had_error = true;
 200                 }
 201                 else if(options->args.checks.num_shorthand_ops > 0) {
 202                         fprintf(stderr, "ERROR: you may not mix shorthand and major operations\n");
 203                         had_error = true;
 204                 }
 205         }
 206
 207         /* check for only one FLAC file used with certain options */
 208         if(options->num_files > 1) {
 209                 if(0 != find_shorthand_operation(options, OP__IMPORT_CUESHEET_FROM)) {
 210                         fprintf(stderr, "ERROR: you may only specify one FLAC file when using '--import-cuesheet-from'\n");
 211                         had_error = true;
 212                 }
 213                 if(0 != find_shorthand_operation(options, OP__EXPORT_CUESHEET_TO)) {
 214                         fprintf(stderr, "ERROR: you may only specify one FLAC file when using '--export-cuesheet-to'\n");
 215                         had_error = true;
 216                 }
 217                 if(0 != find_shorthand_operation(options, OP__EXPORT_PICTURE_TO)) {
 218                         fprintf(stderr, "ERROR: you may only specify one FLAC file when using '--export-picture-to'\n");
 219                         had_error = true;
 220                 }
 221                 if(
 222                         0 != find_shorthand_operation(options, OP__IMPORT_VC_FROM) &&
 223                         0 == strcmp(find_shorthand_operation(options, OP__IMPORT_VC_FROM)->argument.filename.value, "-")
 224                 ) {
 225                         fprintf(stderr, "ERROR: you may only specify one FLAC file when using '--import-tags-from=-'\n");
 226                         had_error = true;
 227                 }
 228         }
 229
 230         if(options->args.checks.has_block_type && options->args.checks.has_except_block_type) {
 231                 fprintf(stderr, "ERROR: you may not specify both '--block-type' and '--except-block-type'\n");
 232                 had_error = true;
 233         }
 234
 235         if(had_error)
 236                 short_usage(0);
 237
 238         /*
 239          * We need to create an OP__ADD_SEEKPOINT operation if there is
 240          * not one already, and --import-cuesheet-from was specified but
 241          * --no-cued-seekpoints was not:
 242          */
 243         if(options->cued_seekpoints) {
 244                 Operation *op = find_shorthand_operation(options, OP__IMPORT_CUESHEET_FROM);
 245                 if(0 != op) {
 246                         Operation *op2 = find_shorthand_operation(options, OP__ADD_SEEKPOINT);
 247                         if(0 == op2)
 248                                 op2 = append_shorthand_operation(options, OP__ADD_SEEKPOINT);
 249                         op->argument.import_cuesheet_from.add_seekpoint_link = &(op2->argument.add_seekpoint);
 250                 }
 251         }
 252
 253         return had_error;
 254 }
 255
 256 void free_options(CommandLineOptions *options)
 257 {
 258         unsigned i;
 259         Operation *op;
 260         Argument *arg;
 261
 262         FLAC__ASSERT(0 == options->ops.operations || options->ops.num_operations > 0);
 263         FLAC__ASSERT(0 == options->args.arguments || options->args.num_arguments > 0);
 264
 265         for(i = 0, op = options->ops.operations; i < options->ops.num_operations; i++, op++) {
 266                 switch(op->type) {
 267                         case OP__SHOW_VC_FIELD:
 268                         case OP__REMOVE_VC_FIELD:
 269                         case OP__REMOVE_VC_FIRSTFIELD:
 270                                 if(0 != op->argument.vc_field_name.value)
 271                                         free(op->argument.vc_field_name.value);
 272                                 break;
 273                         case OP__SET_VC_FIELD:
 274                                 if(0 != op->argument.vc_field.field)
 275                                         free(op->argument.vc_field.field);
 276                                 if(0 != op->argument.vc_field.field_name)
 277                                         free(op->argument.vc_field.field_name);
 278                                 if(0 != op->argument.vc_field.field_value)
 279                                         free(op->argument.vc_field.field_value);
 280                                 break;
 281                         case OP__IMPORT_VC_FROM:
 282                         case OP__EXPORT_VC_TO:
 283                         case OP__EXPORT_CUESHEET_TO:
 284                                 if(0 != op->argument.filename.value)
 285                                         free(op->argument.filename.value);
 286                                 break;
 287                         case OP__IMPORT_CUESHEET_FROM:
 288                                 if(0 != op->argument.import_cuesheet_from.filename)
 289                                         free(op->argument.import_cuesheet_from.filename);
 290                                 break;
 291                         case OP__IMPORT_PICTURE_FROM:
 292                                 if(0 != op->argument.specification.value)
 293                                         free(op->argument.specification.value);
 294                                 break;
 295                         case OP__EXPORT_PICTURE_TO:
 296                                 if(0 != op->argument.export_picture_to.filename)
 297                                         free(op->argument.export_picture_to.filename);
 298                                 break;
 299                         case OP__ADD_SEEKPOINT:
 300                                 if(0 != op->argument.add_seekpoint.specification)
 301                                         free(op->argument.add_seekpoint.specification);
 302                                 break;
 303                         default:
 304                                 break;
 305                 }
 306         }
 307
 308         for(i = 0, arg = options->args.arguments; i < options->args.num_arguments; i++, arg++) {
 309                 switch(arg->type) {
 310                         case ARG__BLOCK_NUMBER:
 311                                 if(0 != arg->value.block_number.entries)
 312                                         free(arg->value.block_number.entries);
 313                                 break;
 314                         case ARG__BLOCK_TYPE:
 315                         case ARG__EXCEPT_BLOCK_TYPE:
 316                                 if(0 != arg->value.block_type.entries)
 317                                         free(arg->value.block_type.entries);
 318                                 break;
 319                         case ARG__FROM_FILE:
 320                                 if(0 != arg->value.from_file.file_name)
 321                                         free(arg->value.from_file.file_name);
 322                                 break;
 323                         default:
 324                                 break;
 325                 }
 326         }
 327
 328         if(0 != options->ops.operations)
 329                 free(options->ops.operations);
 330
 331         if(0 != options->args.arguments)
 332                 free(options->args.arguments);
 333
 334         if(0 != options->filenames) {
 335                 for(i = 0; i < options->num_files; i++) {
 336                         if(0 != options->filenames[i])
 337                                 free(options->filenames[i]);
 338                 }
 339                 free(options->filenames);
 340         }
 341 }
 342
 343 /*
 344  * local routines
 345  */
 346
 347 FLAC__bool parse_option(int option_index, const char *option_argument, CommandLineOptions *options)
 348 {
 349         const char *opt = long_options_[option_index].name;
 350         Operation *op;
 351         Argument *arg;
 352         FLAC__bool ok = true;
 353
 354         if(0 == strcmp(opt, "preserve-modtime")) {
 355                 options->preserve_modtime = true;
 356         }
 357         else if(0 == strcmp(opt, "with-filename")) {
 358                 options->prefix_with_filename = true;
 359         }
 360         else if(0 == strcmp(opt, "no-filename")) {
 361                 options->prefix_with_filename = false;
 362         }
 363         else if(0 == strcmp(opt, "no-utf8-convert")) {
 364                 options->utf8_convert = false;
 365         }
 366         else if(0 == strcmp(opt, "dont-use-padding")) {
 367                 options->use_padding = false;
 368         }
 369         else if(0 == strcmp(opt, "no-cued-seekpoints")) {
 370                 options->cued_seekpoints = false;
 371         }
 372         else if(0 == strcmp(opt, "show-md5sum")) {
 373                 (void) append_shorthand_operation(options, OP__SHOW_MD5SUM);
 374         }
 375         else if(0 == strcmp(opt, "show-min-blocksize")) {
 376                 (void) append_shorthand_operation(options, OP__SHOW_MIN_BLOCKSIZE);
 377         }
 378         else if(0 == strcmp(opt, "show-max-blocksize")) {
 379                 (void) append_shorthand_operation(options, OP__SHOW_MAX_BLOCKSIZE);
 380         }
 381         else if(0 == strcmp(opt, "show-min-framesize")) {
 382                 (void) append_shorthand_operation(options, OP__SHOW_MIN_FRAMESIZE);
 383         }
 384         else if(0 == strcmp(opt, "show-max-framesize")) {
 385                 (void) append_shorthand_operation(options, OP__SHOW_MAX_FRAMESIZE);
 386         }
 387         else if(0 == strcmp(opt, "show-sample-rate")) {
 388                 (void) append_shorthand_operation(options, OP__SHOW_SAMPLE_RATE);
 389         }
 390         else if(0 == strcmp(opt, "show-channels")) {
 391                 (void) append_shorthand_operation(options, OP__SHOW_CHANNELS);
 392         }
 393         else if(0 == strcmp(opt, "show-bps")) {
 394                 (void) append_shorthand_operation(options, OP__SHOW_BPS);
 395         }
 396         else if(0 == strcmp(opt, "show-total-samples")) {
 397                 (void) append_shorthand_operation(options, OP__SHOW_TOTAL_SAMPLES);
 398         }
 399         else if(0 == strcmp(opt, "set-md5sum")) {
 400                 op = append_shorthand_operation(options, OP__SET_MD5SUM);
 401                 FLAC__ASSERT(0 != option_argument);
 402                 if(!parse_md5(option_argument, op->argument.streaminfo_md5.value)) {
 403                         fprintf(stderr, "ERROR (--%s): bad MD5 sum\n", opt);
 404                         ok = false;
 405                 }
 406                 else
 407                         undocumented_warning(opt);
 408         }
 409         else if(0 == strcmp(opt, "set-min-blocksize")) {
 410                 op = append_shorthand_operation(options, OP__SET_MIN_BLOCKSIZE);
 411                 if(!parse_uint32(option_argument, &(op->argument.streaminfo_uint32.value)) || op->argument.streaminfo_uint32.value < FLAC__MIN_BLOCK_SIZE || op->argument.streaminfo_uint32.value > FLAC__MAX_BLOCK_SIZE) {
 412                         fprintf(stderr, "ERROR (--%s): value must be >= %u and <= %u\n", opt, FLAC__MIN_BLOCK_SIZE, FLAC__MAX_BLOCK_SIZE);
 413                         ok = false;
 414                 }
 415                 else
 416                         undocumented_warning(opt);
 417         }
 418         else if(0 == strcmp(opt, "set-max-blocksize")) {
 419                 op = append_shorthand_operation(options, OP__SET_MAX_BLOCKSIZE);
 420                 if(!parse_uint32(option_argument, &(op->argument.streaminfo_uint32.value)) || op->argument.streaminfo_uint32.value < FLAC__MIN_BLOCK_SIZE || op->argument.streaminfo_uint32.value > FLAC__MAX_BLOCK_SIZE) {
 421                         fprintf(stderr, "ERROR (--%s): value must be >= %u and <= %u\n", opt, FLAC__MIN_BLOCK_SIZE, FLAC__MAX_BLOCK_SIZE);
 422                         ok = false;
 423                 }
 424                 else
 425                         undocumented_warning(opt);
 426         }
 427         else if(0 == strcmp(opt, "set-min-framesize")) {
 428                 op = append_shorthand_operation(options, OP__SET_MIN_FRAMESIZE);
 429                 if(!parse_uint32(option_argument, &(op->argument.streaminfo_uint32.value)) || op->argument.streaminfo_uint32.value >= (1u<<FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN)) {
 430                         fprintf(stderr, "ERROR (--%s): value must be a %u-bit unsigned integer\n", opt, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN);
 431                         ok = false;
 432                 }
 433                 else
 434                         undocumented_warning(opt);
 435         }
 436         else if(0 == strcmp(opt, "set-max-framesize")) {
 437                 op = append_shorthand_operation(options, OP__SET_MAX_FRAMESIZE);
 438                 if(!parse_uint32(option_argument, &(op->argument.streaminfo_uint32.value)) || op->argument.streaminfo_uint32.value >= (1u<<FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN)) {
 439                         fprintf(stderr, "ERROR (--%s): value must be a %u-bit unsigned integer\n", opt, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN);
 440                         ok = false;
 441                 }
 442                 else
 443                         undocumented_warning(opt);
 444         }
 445         else if(0 == strcmp(opt, "set-sample-rate")) {
 446                 op = append_shorthand_operation(options, OP__SET_SAMPLE_RATE);
 447                 if(!parse_uint32(option_argument, &(op->argument.streaminfo_uint32.value)) || !FLAC__format_sample_rate_is_valid(op->argument.streaminfo_uint32.value)) {
 448                         fprintf(stderr, "ERROR (--%s): invalid sample rate\n", opt);
 449                         ok = false;
 450                 }
 451                 else
 452                         undocumented_warning(opt);
 453         }
 454         else if(0 == strcmp(opt, "set-channels")) {
 455                 op = append_shorthand_operation(options, OP__SET_CHANNELS);
 456                 if(!parse_uint32(option_argument, &(op->argument.streaminfo_uint32.value)) || op->argument.streaminfo_uint32.value > FLAC__MAX_CHANNELS) {
 457                         fprintf(stderr, "ERROR (--%s): value must be > 0 and <= %u\n", opt, FLAC__MAX_CHANNELS);
 458                         ok = false;
 459                 }
 460                 else
 461                         undocumented_warning(opt);
 462         }
 463         else if(0 == strcmp(opt, "set-bps")) {
 464                 op = append_shorthand_operation(options, OP__SET_BPS);
 465                 if(!parse_uint32(option_argument, &(op->argument.streaminfo_uint32.value)) || op->argument.streaminfo_uint32.value < FLAC__MIN_BITS_PER_SAMPLE || op->argument.streaminfo_uint32.value > FLAC__MAX_BITS_PER_SAMPLE) {
 466                         fprintf(stderr, "ERROR (--%s): value must be >= %u and <= %u\n", opt, FLAC__MIN_BITS_PER_SAMPLE, FLAC__MAX_BITS_PER_SAMPLE);
 467                         ok = false;
 468                 }
 469                 else
 470                         undocumented_warning(opt);
 471         }
 472         else if(0 == strcmp(opt, "set-total-samples")) {
 473                 op = append_shorthand_operation(options, OP__SET_TOTAL_SAMPLES);
 474                 if(!parse_uint64(option_argument, &(op->argument.streaminfo_uint64.value)) || op->argument.streaminfo_uint64.value >= (((FLAC__uint64)1)<<FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN)) {
 475                         fprintf(stderr, "ERROR (--%s): value must be a %u-bit unsigned integer\n", opt, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN);
 476                         ok = false;
 477                 }
 478                 else
 479                         undocumented_warning(opt);
 480         }
 481         else if(0 == strcmp(opt, "show-vendor-tag")) {
 482                 (void) append_shorthand_operation(options, OP__SHOW_VC_VENDOR);
 483         }
 484         else if(0 == strcmp(opt, "show-tag")) {
 485                 const char *violation;
 486                 op = append_shorthand_operation(options, OP__SHOW_VC_FIELD);
 487                 FLAC__ASSERT(0 != option_argument);
 488                 if(!parse_vorbis_comment_field_name(option_argument, &(op->argument.vc_field_name.value), &violation)) {
 489                         FLAC__ASSERT(0 != violation);
 490                         fprintf(stderr, "ERROR (--%s): malformed vorbis comment field name \"%s\",\n       %s\n", opt, option_argument, violation);
 491                         ok = false;
 492                 }
 493         }
 494         else if(0 == strcmp(opt, "remove-all-tags")) {
 495                 (void) append_shorthand_operation(options, OP__REMOVE_VC_ALL);
 496         }
 497         else if(0 == strcmp(opt, "remove-tag")) {
 498                 const char *violation;
 499                 op = append_shorthand_operation(options, OP__REMOVE_VC_FIELD);
 500                 FLAC__ASSERT(0 != option_argument);
 501                 if(!parse_vorbis_comment_field_name(option_argument, &(op->argument.vc_field_name.value), &violation)) {
 502                         FLAC__ASSERT(0 != violation);
 503                         fprintf(stderr, "ERROR (--%s): malformed vorbis comment field name \"%s\",\n       %s\n", opt, option_argument, violation);
 504                         ok = false;
 505                 }
 506         }
 507         else if(0 == strcmp(opt, "remove-first-tag")) {
 508                 const char *violation;
 509                 op = append_shorthand_operation(options, OP__REMOVE_VC_FIRSTFIELD);
 510                 FLAC__ASSERT(0 != option_argument);
 511                 if(!parse_vorbis_comment_field_name(option_argument, &(op->argument.vc_field_name.value), &violation)) {
 512                         FLAC__ASSERT(0 != violation);
 513                         fprintf(stderr, "ERROR (--%s): malformed vorbis comment field name \"%s\",\n       %s\n", opt, option_argument, violation);
 514                         ok = false;
 515                 }
 516         }
 517         else if(0 == strcmp(opt, "set-tag")) {
 518                 const char *violation;
 519                 op = append_shorthand_operation(options, OP__SET_VC_FIELD);
 520                 FLAC__ASSERT(0 != option_argument);
 521                 op->argument.vc_field.field_value_from_file = false;
 522                 if(!parse_vorbis_comment_field(option_argument, &(op->argument.vc_field.field), &(op->argument.vc_field.field_name), &(op->argument.vc_field.field_value), &(op->argument.vc_field.field_value_length), &violation)) {
 523                         FLAC__ASSERT(0 != violation);
 524                         fprintf(stderr, "ERROR (--%s): malformed vorbis comment field \"%s\",\n       %s\n", opt, option_argument, violation);
 525                         ok = false;
 526                 }
 527         }
 528         else if(0 == strcmp(opt, "set-tag-from-file")) {
 529                 const char *violation;
 530                 op = append_shorthand_operation(options, OP__SET_VC_FIELD);
 531                 FLAC__ASSERT(0 != option_argument);
 532                 op->argument.vc_field.field_value_from_file = true;
 533                 if(!parse_vorbis_comment_field(option_argument, &(op->argument.vc_field.field), &(op->argument.vc_field.field_name), &(op->argument.vc_field.field_value), &(op->argument.vc_field.field_value_length), &violation)) {
 534                         FLAC__ASSERT(0 != violation);
 535                         fprintf(stderr, "ERROR (--%s): malformed vorbis comment field \"%s\",\n       %s\n", opt, option_argument, violation);
 536                         ok = false;
 537                 }
 538         }
 539         else if(0 == strcmp(opt, "import-tags-from")) {
 540                 op = append_shorthand_operation(options, OP__IMPORT_VC_FROM);
 541                 FLAC__ASSERT(0 != option_argument);
 542                 if(!parse_string(option_argument, &(op->argument.filename.value))) {
 543                         fprintf(stderr, "ERROR (--%s): missing filename\n", opt);
 544                         ok = false;
 545                 }
 546         }
 547         else if(0 == strcmp(opt, "export-tags-to")) {
 548                 op = append_shorthand_operation(options, OP__EXPORT_VC_TO);
 549                 FLAC__ASSERT(0 != option_argument);
 550                 if(!parse_string(option_argument, &(op->argument.filename.value))) {
 551                         fprintf(stderr, "ERROR (--%s): missing filename\n", opt);
 552                         ok = false;
 553                 }
 554         }
 555         else if(0 == strcmp(opt, "import-cuesheet-from")) {
 556                 if(0 != find_shorthand_operation(options, OP__IMPORT_CUESHEET_FROM)) {
 557                         fprintf(stderr, "ERROR (--%s): may be specified only once\n", opt);
 558                         ok = false;
 559                 }
 560                 op = append_shorthand_operation(options, OP__IMPORT_CUESHEET_FROM);
 561                 FLAC__ASSERT(0 != option_argument);
 562                 if(!parse_string(option_argument, &(op->argument.import_cuesheet_from.filename))) {
 563                         fprintf(stderr, "ERROR (--%s): missing filename\n", opt);
 564                         ok = false;
 565                 }
 566         }
 567         else if(0 == strcmp(opt, "export-cuesheet-to")) {
 568                 op = append_shorthand_operation(options, OP__EXPORT_CUESHEET_TO);
 569                 FLAC__ASSERT(0 != option_argument);
 570                 if(!parse_string(option_argument, &(op->argument.filename.value))) {
 571                         fprintf(stderr, "ERROR (--%s): missing filename\n", opt);
 572                         ok = false;
 573                 }
 574         }
 575         else if(0 == strcmp(opt, "import-picture-from")) {
 576                 op = append_shorthand_operation(options, OP__IMPORT_PICTURE_FROM);
 577                 FLAC__ASSERT(0 != option_argument);
 578                 if(!parse_string(option_argument, &(op->argument.specification.value))) {
 579                         fprintf(stderr, "ERROR (--%s): missing specification\n", opt);
 580                         ok = false;
 581                 }
 582         }
 583         else if(0 == strcmp(opt, "export-picture-to")) {
 584                 const Argument *arg = find_argument(options, ARG__BLOCK_NUMBER);
 585                 op = append_shorthand_operation(options, OP__EXPORT_PICTURE_TO);
 586                 FLAC__ASSERT(0 != option_argument);
 587                 if(!parse_string(option_argument, &(op->argument.export_picture_to.filename))) {
 588                         fprintf(stderr, "ERROR (--%s): missing filename\n", opt);
 589                         ok = false;
 590                 }
 591                 op->argument.export_picture_to.block_number_link = arg? &(arg->value.block_number) : 0;
 592         }
 593         else if(0 == strcmp(opt, "add-seekpoint")) {
 594                 const char *violation;
 595                 char *spec;
 596                 FLAC__ASSERT(0 != option_argument);
 597                 if(!parse_add_seekpoint(option_argument, &spec, &violation)) {
 598                         FLAC__ASSERT(0 != violation);
 599                         fprintf(stderr, "ERROR (--%s): malformed seekpoint specification \"%s\",\n       %s\n", opt, option_argument, violation);
 600                         ok = false;
 601                 }
 602                 else {
 603                         op = find_shorthand_operation(options, OP__ADD_SEEKPOINT);
 604                         if(0 == op)
 605                                 op = append_shorthand_operation(options, OP__ADD_SEEKPOINT);
 606                         local_strcat(&(op->argument.add_seekpoint.specification), spec);
 607                         local_strcat(&(op->argument.add_seekpoint.specification), ";");
 608                         free(spec);
 609                 }
 610         }
 611         else if(0 == strcmp(opt, "add-replay-gain")) {
 612                 (void) append_shorthand_operation(options, OP__ADD_REPLAY_GAIN);
 613         }
 614         else if(0 == strcmp(opt, "remove-replay-gain")) {
 615                 const FLAC__byte * const tags[5] = {
 616                         GRABBAG__REPLAYGAIN_TAG_REFERENCE_LOUDNESS,
 617                         GRABBAG__REPLAYGAIN_TAG_TITLE_GAIN,
 618                         GRABBAG__REPLAYGAIN_TAG_TITLE_PEAK,
 619                         GRABBAG__REPLAYGAIN_TAG_ALBUM_GAIN,
 620                         GRABBAG__REPLAYGAIN_TAG_ALBUM_PEAK
 621                 };
 622                 size_t i;
 623                 for(i = 0; i < sizeof(tags)/sizeof(tags[0]); i++) {
 624                         op = append_shorthand_operation(options, OP__REMOVE_VC_FIELD);
 625                         op->argument.vc_field_name.value = local_strdup((const char *)tags[i]);
 626                 }
 627         }
 628         else if(0 == strcmp(opt, "add-padding")) {
 629                 op = append_shorthand_operation(options, OP__ADD_PADDING);
 630                 FLAC__ASSERT(0 != option_argument);
 631                 if(!parse_add_padding(option_argument, &(op->argument.add_padding.length))) {
 632                         fprintf(stderr, "ERROR (--%s): illegal length \"%s\", length must be >= 0 and < 2^%u\n", opt, option_argument, FLAC__STREAM_METADATA_LENGTH_LEN);
 633                         ok = false;
 634                 }
 635         }
 636         else if(0 == strcmp(opt, "help")) {
 637                 options->show_long_help = true;
 638         }
 639         else if(0 == strcmp(opt, "version")) {
 640                 options->show_version = true;
 641         }
 642         else if(0 == strcmp(opt, "list")) {
 643                 (void) append_major_operation(options, OP__LIST);
 644         }
 645         else if(0 == strcmp(opt, "append")) {
 646                 (void) append_major_operation(options, OP__APPEND);
 647         }
 648         else if(0 == strcmp(opt, "remove")) {
 649                 (void) append_major_operation(options, OP__REMOVE);
 650         }
 651         else if(0 == strcmp(opt, "remove-all")) {
 652                 (void) append_major_operation(options, OP__REMOVE_ALL);
 653         }
 654         else if(0 == strcmp(opt, "merge-padding")) {
 655                 (void) append_major_operation(options, OP__MERGE_PADDING);
 656         }
 657         else if(0 == strcmp(opt, "sort-padding")) {
 658                 (void) append_major_operation(options, OP__SORT_PADDING);
 659         }
 660         else if(0 == strcmp(opt, "block-number")) {
 661                 arg = append_argument(options, ARG__BLOCK_NUMBER);
 662                 FLAC__ASSERT(0 != option_argument);
 663                 if(!parse_block_number(option_argument, &(arg->value.block_number))) {
 664                         fprintf(stderr, "ERROR: malformed block number specification \"%s\"\n", option_argument);
 665                         ok = false;
 666                 }
 667         }
 668         else if(0 == strcmp(opt, "block-type")) {
 669                 arg = append_argument(options, ARG__BLOCK_TYPE);
 670                 FLAC__ASSERT(0 != option_argument);
 671                 if(!parse_block_type(option_argument, &(arg->value.block_type))) {
 672                         fprintf(stderr, "ERROR (--%s): malformed block type specification \"%s\"\n", opt, option_argument);
 673                         ok = false;
 674                 }
 675                 options->args.checks.has_block_type = true;
 676         }
 677         else if(0 == strcmp(opt, "except-block-type")) {
 678                 arg = append_argument(options, ARG__EXCEPT_BLOCK_TYPE);
 679                 FLAC__ASSERT(0 != option_argument);
 680                 if(!parse_block_type(option_argument, &(arg->value.block_type))) {
 681                         fprintf(stderr, "ERROR (--%s): malformed block type specification \"%s\"\n", opt, option_argument);
 682                         ok = false;
 683                 }
 684                 options->args.checks.has_except_block_type = true;
 685         }
 686         else if(0 == strcmp(opt, "data-format")) {
 687                 arg = append_argument(options, ARG__DATA_FORMAT);
 688                 FLAC__ASSERT(0 != option_argument);
 689                 if(!parse_data_format(option_argument, &(arg->value.data_format))) {
 690                         fprintf(stderr, "ERROR (--%s): illegal data format \"%s\"\n", opt, option_argument);
 691                         ok = false;
 692                 }
 693         }
 694         else if(0 == strcmp(opt, "application-data-format")) {
 695                 FLAC__ASSERT(0 != option_argument);
 696                 if(!parse_application_data_format(option_argument, &(options->application_data_format_is_hexdump))) {
 697                         fprintf(stderr, "ERROR (--%s): illegal application data format \"%s\"\n", opt, option_argument);
 698                         ok = false;
 699                 }
 700         }
 701         else if(0 == strcmp(opt, "from-file")) {
 702                 arg = append_argument(options, ARG__FROM_FILE);
 703                 FLAC__ASSERT(0 != option_argument);
 704                 arg->value.from_file.file_name = local_strdup(option_argument);
 705         }
 706         else {
 707                 FLAC__ASSERT(0);
 708         }
 709
 710         return ok;
 711 }
 712
 713 void append_new_operation(CommandLineOptions *options, Operation operation)
 714 {
 715         if(options->ops.capacity == 0) {
 716                 options->ops.capacity = 50;
 717                 if(0 == (options->ops.operations = malloc(sizeof(Operation) * options->ops.capacity)))
 718                         die("out of memory allocating space for option list");
 719                 memset(options->ops.operations, 0, sizeof(Operation) * options->ops.capacity);
 720         }
 721         if(options->ops.capacity <= options->ops.num_operations) {
 722                 unsigned original_capacity = options->ops.capacity;
 723                 if(options->ops.capacity > UINT32_MAX / 2) /* overflow check */
 724                         die("out of memory allocating space for option list");
 725                 options->ops.capacity *= 2;
 726                 if(0 == (options->ops.operations = safe_realloc_mul_2op_(options->ops.operations, sizeof(Operation), /*times*/options->ops.capacity)))
 727                         die("out of memory allocating space for option list");
 728                 memset(options->ops.operations + original_capacity, 0, sizeof(Operation) * (options->ops.capacity - original_capacity));
 729         }
 730
 731         options->ops.operations[options->ops.num_operations++] = operation;
 732 }
 733
 734 void append_new_argument(CommandLineOptions *options, Argument argument)
 735 {
 736         if(options->args.capacity == 0) {
 737                 options->args.capacity = 50;
 738                 if(0 == (options->args.arguments = malloc(sizeof(Argument) * options->args.capacity)))
 739                         die("out of memory allocating space for option list");
 740                 memset(options->args.arguments, 0, sizeof(Argument) * options->args.capacity);
 741         }
 742         if(options->args.capacity <= options->args.num_arguments) {
 743                 unsigned original_capacity = options->args.capacity;
 744                 if(options->args.capacity > UINT32_MAX / 2) /* overflow check */
 745                         die("out of memory allocating space for option list");
 746                 options->args.capacity *= 2;
 747                 if(0 == (options->args.arguments = safe_realloc_mul_2op_(options->args.arguments, sizeof(Argument), /*times*/options->args.capacity)))
 748                         die("out of memory allocating space for option list");
 749                 memset(options->args.arguments + original_capacity, 0, sizeof(Argument) * (options->args.capacity - original_capacity));
 750         }
 751
 752         options->args.arguments[options->args.num_arguments++] = argument;
 753 }
 754
 755 Operation *append_major_operation(CommandLineOptions *options, OperationType type)
 756 {
 757         Operation op;
 758         memset(&op, 0, sizeof(op));
 759         op.type = type;
 760         append_new_operation(options, op);
 761         options->args.checks.num_major_ops++;
 762         return options->ops.operations + (options->ops.num_operations - 1);
 763 }
 764
 765 Operation *append_shorthand_operation(CommandLineOptions *options, OperationType type)
 766 {
 767         Operation op;
 768         memset(&op, 0, sizeof(op));
 769         op.type = type;
 770         append_new_operation(options, op);
 771         options->args.checks.num_shorthand_ops++;
 772         return options->ops.operations + (options->ops.num_operations - 1);
 773 }
 774
 775 Argument *find_argument(CommandLineOptions *options, ArgumentType type)
 776 {
 777         unsigned i;
 778         for(i = 0; i < options->args.num_arguments; i++)
 779                 if(options->args.arguments[i].type == type)
 780                         return &options->args.arguments[i];
 781         return 0;
 782 }
 783
 784 Operation *find_shorthand_operation(CommandLineOptions *options, OperationType type)
 785 {
 786         unsigned i;
 787         for(i = 0; i < options->ops.num_operations; i++)
 788                 if(options->ops.operations[i].type == type)
 789                         return &options->ops.operations[i];
 790         return 0;
 791 }
 792
 793 Argument *append_argument(CommandLineOptions *options, ArgumentType type)
 794 {
 795         Argument arg;
 796         memset(&arg, 0, sizeof(arg));
 797         arg.type = type;
 798         append_new_argument(options, arg);
 799         return options->args.arguments + (options->args.num_arguments - 1);
 800 }
 801
 802 FLAC__bool parse_md5(const char *src, FLAC__byte dest[16])
 803 {
 804         unsigned i, d;
 805         int c;
 806         FLAC__ASSERT(0 != src);
 807         if(strlen(src) != 32)
 808                 return false;
 809         /* strtoul() accepts negative numbers which we do not want, so we do it the hard way */
 810         for(i = 0; i < 16; i++) {
 811                 c = (int)(*src++);
 812                 if(isdigit(c))
 813                         d = (unsigned)(c - '0');
 814                 else if(c >= 'a' && c <= 'f')
 815                         d = (unsigned)(c - 'a') + 10u;
 816                 else if(c >= 'A' && c <= 'F')
 817                         d = (unsigned)(c - 'A') + 10u;
 818                 else
 819                         return false;
 820                 d <<= 4;
 821                 c = (int)(*src++);
 822                 if(isdigit(c))
 823                         d |= (unsigned)(c - '0');
 824                 else if(c >= 'a' && c <= 'f')
 825                         d |= (unsigned)(c - 'a') + 10u;
 826                 else if(c >= 'A' && c <= 'F')
 827                         d |= (unsigned)(c - 'A') + 10u;
 828                 else
 829                         return false;
 830                 dest[i] = (FLAC__byte)d;
 831         }
 832         return true;
 833 }
 834
 835 FLAC__bool parse_uint32(const char *src, FLAC__uint32 *dest)
 836 {
 837         FLAC__ASSERT(0 != src);
 838         if(strlen(src) == 0 || strspn(src, "0123456789") != strlen(src))
 839                 return false;
 840         *dest = strtoul(src, 0, 10);
 841         return true;
 842 }
 843
 844 FLAC__bool parse_uint64(const char *src, FLAC__uint64 *dest)
 845 {
 846         FLAC__ASSERT(0 != src);
 847         if(strlen(src) == 0 || strspn(src, "0123456789") != strlen(src))
 848                 return false;
 849         *dest = strtoull(src, 0, 10);
 850         return true;
 851 }
 852
 853 FLAC__bool parse_string(const char *src, char **dest)
 854 {
 855         if(0 == src || strlen(src) == 0)
 856                 return false;
 857         *dest = strdup(src);
 858         return true;
 859 }
 860
 861 FLAC__bool parse_vorbis_comment_field_name(const char *field_ref, char **name, const char **violation)
 862 {
 863         static const char * const violations[] = {
 864                 "field name contains invalid character"
 865         };
 866
 867         char *q, *s;
 868
 869         s = local_strdup(field_ref);
 870
 871         for(q = s; *q; q++) {
 872                 if(*q < 0x20 || *q > 0x7d || *q == 0x3d) {
 873                         free(s);
 874                         *violation = violations[0];
 875                         return false;
 876                 }
 877         }
 878
 879         *name = s;
 880
 881         return true;
 882 }
 883
 884 FLAC__bool parse_add_seekpoint(const char *in, char **out, const char **violation)
 885 {
 886         static const char *garbled_ = "garbled specification";
 887         const unsigned n = strlen(in);
 888
 889         FLAC__ASSERT(0 != in);
 890         FLAC__ASSERT(0 != out);
 891
 892         if(n == 0) {
 893                 *violation = "specification is empty";
 894                 return false;
 895         }
 896
 897         if(n > strspn(in, "0123456789.Xsx")) {
 898                 *violation = "specification contains invalid character";
 899                 return false;
 900         }
 901
 902         if(in[n-1] == 'X') {
 903                 if(n > 1) {
 904                         *violation = garbled_;
 905                         return false;
 906                 }
 907         }
 908         else if(in[n-1] == 's') {
 909                 if(n-1 > strspn(in, "0123456789.")) {
 910                         *violation = garbled_;
 911                         return false;
 912                 }
 913         }
 914         else if(in[n-1] == 'x') {
 915                 if(n-1 > strspn(in, "0123456789")) {
 916                         *violation = garbled_;
 917                         return false;
 918                 }
 919         }
 920         else {
 921                 if(n > strspn(in, "0123456789")) {
 922                         *violation = garbled_;
 923                         return false;
 924                 }
 925         }
 926
 927         *out = local_strdup(in);
 928         return true;
 929 }
 930
 931 FLAC__bool parse_add_padding(const char *in, unsigned *out)
 932 {
 933         FLAC__ASSERT(0 != in);
 934         FLAC__ASSERT(0 != out);
 935         *out = (unsigned)strtoul(in, 0, 10);
 936         return *out < (1u << FLAC__STREAM_METADATA_LENGTH_LEN);
 937 }
 938
 939 FLAC__bool parse_block_number(const char *in, Argument_BlockNumber *out)
 940 {
 941         char *p, *q, *s, *end;
 942         long i;
 943         unsigned entry;
 944
 945         if(*in == '\0')
 946                 return false;
 947
 948         s = local_strdup(in);
 949
 950         /* first count the entries */
 951         for(out->num_entries = 1, p = strchr(s, ','); p; out->num_entries++, p = strchr(++p, ','))
 952                 ;
 953
 954         /* make space */
 955         FLAC__ASSERT(out->num_entries > 0);
 956         if(0 == (out->entries = safe_malloc_mul_2op_(sizeof(unsigned), /*times*/out->num_entries)))
 957                 die("out of memory allocating space for option list");
 958
 959         /* load 'em up */
 960         entry = 0;
 961         q = s;
 962         while(q) {
 963                 FLAC__ASSERT(entry < out->num_entries);
 964                 if(0 != (p = strchr(q, ',')))
 965                         *p++ = '\0';
 966                 if(!isdigit((int)(*q)) || (i = strtol(q, &end, 10)) < 0 || *end) {
 967                         free(s);
 968                         return false;
 969                 }
 970                 out->entries[entry++] = (unsigned)i;
 971                 q = p;
 972         }
 973         FLAC__ASSERT(entry == out->num_entries);
 974
 975         free(s);
 976         return true;
 977 }
 978
 979 FLAC__bool parse_block_type(const char *in, Argument_BlockType *out)
 980 {
 981         char *p, *q, *r, *s;
 982         unsigned entry;
 983
 984         if(*in == '\0')
 985                 return false;
 986
 987         s = local_strdup(in);
 988
 989         /* first count the entries */
 990         for(out->num_entries = 1, p = strchr(s, ','); p; out->num_entries++, p = strchr(++p, ','))
 991                 ;
 992
 993         /* make space */
 994         FLAC__ASSERT(out->num_entries > 0);
 995         if(0 == (out->entries = safe_malloc_mul_2op_(sizeof(Argument_BlockTypeEntry), /*times*/out->num_entries)))
 996                 die("out of memory allocating space for option list");
 997
 998         /* load 'em up */
 999         entry = 0;
1000         q = s;
1001         while(q) {
1002                 FLAC__ASSERT(entry < out->num_entries);
1003                 if(0 != (p = strchr(q, ',')))
1004                         *p++ = 0;
1005                 r = strchr(q, ':');
1006                 if(r)
1007                         *r++ = '\0';
1008                 if(0 != r && 0 != strcmp(q, "APPLICATION")) {
1009                         free(s);
1010                         return false;
1011                 }
1012                 if(0 == strcmp(q, "STREAMINFO")) {
1013                         out->entries[entry++].type = FLAC__METADATA_TYPE_STREAMINFO;
1014                 }
1015                 else if(0 == strcmp(q, "PADDING")) {
1016                         out->entries[entry++].type = FLAC__METADATA_TYPE_PADDING;
1017                 }
1018                 else if(0 == strcmp(q, "APPLICATION")) {
1019                         out->entries[entry].type = FLAC__METADATA_TYPE_APPLICATION;
1020                         out->entries[entry].filter_application_by_id = (0 != r);
1021                         if(0 != r) {
1022                                 if(strlen(r) == sizeof (out->entries[entry].application_id)) {
1023                                         memcpy(out->entries[entry].application_id, r, sizeof (out->entries[entry].application_id));
1024                                 }
1025                                 else if(strlen(r) == 10 && strncmp(r, "0x", 2) == 0 && strspn(r+2, "0123456789ABCDEFabcdef") == 8) {
1026                                         FLAC__uint32 x = strtoul(r+2, 0, 16);
1027                                         out->entries[entry].application_id[3] = (FLAC__byte)(x & 0xff);
1028                                         out->entries[entry].application_id[2] = (FLAC__byte)((x>>=8) & 0xff);
1029                                         out->entries[entry].application_id[1] = (FLAC__byte)((x>>=8) & 0xff);
1030                                         out->entries[entry].application_id[0] = (FLAC__byte)((x>>=8) & 0xff);
1031                                 }
1032                                 else {
1033                                         free(s);
1034                                         return false;
1035                                 }
1036                         }
1037                         entry++;
1038                 }
1039                 else if(0 == strcmp(q, "SEEKTABLE")) {
1040                         out->entries[entry++].type = FLAC__METADATA_TYPE_SEEKTABLE;
1041                 }
1042                 else if(0 == strcmp(q, "VORBIS_COMMENT")) {
1043                         out->entries[entry++].type = FLAC__METADATA_TYPE_VORBIS_COMMENT;
1044                 }
1045                 else if(0 == strcmp(q, "CUESHEET")) {
1046                         out->entries[entry++].type = FLAC__METADATA_TYPE_CUESHEET;
1047                 }
1048                 else if(0 == strcmp(q, "PICTURE")) {
1049                         out->entries[entry++].type = FLAC__METADATA_TYPE_PICTURE;
1050                 }
1051                 else {
1052                         free(s);
1053                         return false;
1054                 }
1055                 q = p;
1056         }
1057         FLAC__ASSERT(entry == out->num_entries);
1058
1059         free(s);
1060         return true;
1061 }
1062
1063 FLAC__bool parse_data_format(const char *in, Argument_DataFormat *out)
1064 {
1065         if(0 == strcmp(in, "binary"))
1066                 out->is_binary = true;
1067         else if(0 == strcmp(in, "text"))
1068                 out->is_binary = false;
1069         else
1070                 return false;
1071         return true;
1072 }
1073
1074 FLAC__bool parse_application_data_format(const char *in, FLAC__bool *out)
1075 {
1076         if(0 == strcmp(in, "hexdump"))
1077                 *out = true;
1078         else if(0 == strcmp(in, "text"))
1079                 *out = false;
1080         else
1081                 return false;
1082         return true;
1083 }
1084
1085 void undocumented_warning(const char *opt)
1086 {
1087         fprintf(stderr, "WARNING: undocmented option --%s should be used with caution,\n         only for repairing a damaged STREAMINFO block\n", opt);
1088 }