src/metaflac/options.c

   1 /* metaflac - Command-line FLAC metadata editor
   2  * Copyright (C) 2001,2002,2003,2004,2005  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 #include "options.h"
  20 #include "usage.h"
  21 #include "utils.h"
  22 #include "FLAC/assert.h"
  23 #include <ctype.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 /*
  29    share__getopt format struct; note we don't use short options so we just
  30    set the 'val' field to 0 everywhere to indicate a valid option.
  31 */
  32 struct share__option long_options_[] = {
  33         /* global options */
  34         { "preserve-modtime", 0, 0, 0 },
  35         { "with-filename", 0, 0, 0 },
  36         { "no-filename", 0, 0, 0 },
  37         { "no-utf8-convert", 0, 0, 0 },
  38         { "dont-use-padding", 0, 0, 0 },
  39         { "no-cued-seekpoints", 0, 0, 0 },
  40         /* shorthand operations */
  41         { "show-md5sum", 0, 0, 0 },
  42         { "show-min-blocksize", 0, 0, 0 },
  43         { "show-max-blocksize", 0, 0, 0 },
  44         { "show-min-framesize", 0, 0, 0 },
  45         { "show-max-framesize", 0, 0, 0 },
  46         { "show-sample-rate", 0, 0, 0 },
  47         { "show-channels", 0, 0, 0 },
  48         { "show-bps", 0, 0, 0 },
  49         { "show-total-samples", 0, 0, 0 },
  50         { "set-md5sum", 1, 0, 0 }, /* undocumented */
  51         { "set-min-blocksize", 1, 0, 0 }, /* undocumented */
  52         { "set-max-blocksize", 1, 0, 0 }, /* undocumented */
  53         { "set-min-framesize", 1, 0, 0 }, /* undocumented */
  54         { "set-max-framesize", 1, 0, 0 }, /* undocumented */
  55         { "set-sample-rate", 1, 0, 0 }, /* undocumented */
  56         { "set-channels", 1, 0, 0 }, /* undocumented */
  57         { "set-bps", 1, 0, 0 }, /* undocumented */
  58         { "set-total-samples", 1, 0, 0 }, /* undocumented */ /* WATCHOUT: used by test/test_flac.sh on windows */
  59         { "show-vendor-tag", 0, 0, 0 },
  60         { "show-tag", 1, 0, 0 },
  61         { "remove-all-tags", 0, 0, 0 },
  62         { "remove-tag", 1, 0, 0 },
  63         { "remove-first-tag", 1, 0, 0 },
  64         { "set-tag", 1, 0, 0 },
  65         { "import-tags-from", 1, 0, 0 },
  66         { "export-tags-to", 1, 0, 0 },
  67         { "show-vc-vendor", 0, 0, 0 }, /* deprecated */
  68         { "show-vc-field", 1, 0, 0 }, /* deprecated */
  69         { "remove-vc-all", 0, 0, 0 }, /* deprecated */
  70         { "remove-vc-field", 1, 0, 0 }, /* deprecated */
  71         { "remove-vc-firstfield", 1, 0, 0 }, /* deprecated */
  72         { "set-vc-field", 1, 0, 0 }, /* deprecated */
  73         { "import-vc-from", 1, 0, 0 }, /* deprecated */
  74         { "export-vc-to", 1, 0, 0 }, /* deprecated */
  75         { "import-cuesheet-from", 1, 0, 0 },
  76         { "export-cuesheet-to", 1, 0, 0 },
  77         { "add-seekpoint", 1, 0, 0 },
  78         { "add-replay-gain", 0, 0, 0 },
  79         { "add-padding", 1, 0, 0 },
  80         /* major operations */
  81         { "help", 0, 0, 0 },
  82         { "version", 0, 0, 0 },
  83         { "list", 0, 0, 0 },
  84         { "append", 0, 0, 0 },
  85         { "remove", 0, 0, 0 },
  86         { "remove-all", 0, 0, 0 },
  87         { "merge-padding", 0, 0, 0 },
  88         { "sort-padding", 0, 0, 0 },
  89         /* major operation arguments */
  90         { "block-number", 1, 0, 0 },
  91         { "block-type", 1, 0, 0 },
  92         { "except-block-type", 1, 0, 0 },
  93         { "data-format", 1, 0, 0 },
  94         { "application-data-format", 1, 0, 0 },
  95         { "from-file", 1, 0, 0 },
  96         {0, 0, 0, 0}
  97 };
  98
  99 static FLAC__bool parse_option(int option_index, const char *option_argument, CommandLineOptions *options);
 100 static void append_new_operation(CommandLineOptions *options, Operation operation);
 101 static void append_new_argument(CommandLineOptions *options, Argument argument);
 102 static Operation *append_major_operation(CommandLineOptions *options, OperationType type);
 103 static Operation *append_shorthand_operation(CommandLineOptions *options, OperationType type);
 104 static Operation *find_shorthand_operation(CommandLineOptions *options, OperationType type);
 105 static Argument *append_argument(CommandLineOptions *options, ArgumentType type);
 106 static FLAC__bool parse_md5(const char *src, FLAC__byte dest[16]);
 107 static FLAC__bool parse_uint32(const char *src, FLAC__uint32 *dest);
 108 static FLAC__bool parse_uint64(const char *src, FLAC__uint64 *dest);
 109 static FLAC__bool parse_filename(const char *src, char **dest);
 110 static FLAC__bool parse_vorbis_comment_field_name(const char *field_ref, char **name, const char **violation);
 111 static FLAC__bool parse_add_seekpoint(const char *in, char **out, const char **violation);
 112 static FLAC__bool parse_add_padding(const char *in, unsigned *out);
 113 static FLAC__bool parse_block_number(const char *in, Argument_BlockNumber *out);
 114 static FLAC__bool parse_block_type(const char *in, Argument_BlockType *out);
 115 static FLAC__bool parse_data_format(const char *in, Argument_DataFormat *out);
 116 static FLAC__bool parse_application_data_format(const char *in, FLAC__bool *out);
 117 static void undocumented_warning(const char *opt);
 118
 119
 120 void init_options(CommandLineOptions *options)
 121 {
 122         options->preserve_modtime = false;
 123
 124         /* '2' is a hack to mean "use default if not forced on command line" */
 125         FLAC__ASSERT(true != 2);
 126         options->prefix_with_filename = 2;
 127
 128         options->utf8_convert = true;
 129         options->use_padding = true;
 130         options->cued_seekpoints = true;
 131         options->show_long_help = false;
 132         options->show_version = false;
 133         options->application_data_format_is_hexdump = false;
 134
 135         options->ops.operations = 0;
 136         options->ops.num_operations = 0;
 137         options->ops.capacity = 0;
 138
 139         options->args.arguments = 0;
 140         options->args.num_arguments = 0;
 141         options->args.capacity = 0;
 142
 143         options->args.checks.num_shorthand_ops = 0;
 144         options->args.checks.num_major_ops = 0;
 145         options->args.checks.has_block_type = false;
 146         options->args.checks.has_except_block_type = false;
 147
 148         options->num_files = 0;
 149         options->filenames = 0;
 150 }
 151
 152 FLAC__bool parse_options(int argc, char *argv[], CommandLineOptions *options)
 153 {
 154         int ret;
 155         int option_index = 1;
 156         FLAC__bool had_error = false;
 157
 158         while ((ret = share__getopt_long(argc, argv, "", long_options_, &option_index)) != -1) {
 159                 switch (ret) {
 160                         case 0:
 161                                 had_error |= !parse_option(option_index, share__optarg, options);
 162                                 break;
 163                         case '?':
 164                         case ':':
 165                                 had_error = true;
 166                                 break;
 167                         default:
 168                                 FLAC__ASSERT(0);
 169                                 break;
 170                 }
 171         }
 172
 173         if(options->prefix_with_filename == 2)
 174                 options->prefix_with_filename = (argc - share__optind > 1);
 175
 176         if(share__optind >= argc && !options->show_long_help && !options->show_version) {
 177                 fprintf(stderr,"ERROR: you must specify at least one FLAC file;\n");
 178                 fprintf(stderr,"       metaflac cannot be used as a pipe\n");
 179                 had_error = true;
 180         }
 181
 182         options->num_files = argc - share__optind;
 183
 184         if(options->num_files > 0) {
 185                 unsigned i = 0;
 186                 if(0 == (options->filenames = (char**)malloc(sizeof(char*) * options->num_files)))
 187                         die("out of memory allocating space for file names list");
 188                 while(share__optind < argc)
 189                         options->filenames[i++] = local_strdup(argv[share__optind++]);
 190         }
 191
 192         if(options->args.checks.num_major_ops > 0) {
 193                 if(options->args.checks.num_major_ops > 1) {
 194                         fprintf(stderr, "ERROR: you may only specify one major operation at a time\n");
 195                         had_error = true;
 196                 }
 197                 else if(options->args.checks.num_shorthand_ops > 0) {
 198                         fprintf(stderr, "ERROR: you may not mix shorthand and major operations\n");
 199                         had_error = true;
 200                 }
 201         }
 202
 203         /* check for only one FLAC file used with --import-cuesheet-from/--export-cuesheet-to */
 204         if((0 != find_shorthand_operation(options, OP__IMPORT_CUESHEET_FROM) || 0 != find_shorthand_operation(options, OP__EXPORT_CUESHEET_TO)) && options->num_files > 1) {
 205                 fprintf(stderr, "ERROR: you may only specify one FLAC file when using '--import-cuesheet-from' or '--export-cuesheet-to'\n");
 206                 had_error = true;
 207         }
 208
 209         if(options->args.checks.has_block_type && options->args.checks.has_except_block_type) {
 210                 fprintf(stderr, "ERROR: you may not specify both '--block-type' and '--except-block-type'\n");
 211                 had_error = true;
 212         }
 213
 214         if(had_error)
 215                 short_usage(0);
 216
 217         /*
 218          * We need to create an OP__ADD_SEEKPOINT operation if there is
 219          * not one already,  and --import-cuesheet-from was specified but
 220          * --no-cued-seekpoints was not:
 221          */
 222         if(options->cued_seekpoints) {
 223                 Operation *op = find_shorthand_operation(options, OP__IMPORT_CUESHEET_FROM);
 224                 if(0 != op) {
 225                         Operation *op2 = find_shorthand_operation(options, OP__ADD_SEEKPOINT);
 226                         if(0 == op2)
 227                                 op2 = append_shorthand_operation(options, OP__ADD_SEEKPOINT);
 228                         op->argument.import_cuesheet_from.add_seekpoint_link = &(op2->argument.add_seekpoint);
 229                 }
 230         }
 231
 232         return !had_error;
 233 }
 234
 235 void free_options(CommandLineOptions *options)
 236 {
 237         unsigned i;
 238         Operation *op;
 239         Argument *arg;
 240
 241         FLAC__ASSERT(0 == options->ops.operations || options->ops.num_operations > 0);
 242         FLAC__ASSERT(0 == options->args.arguments || options->args.num_arguments > 0);
 243
 244         for(i = 0, op = options->ops.operations; i < options->ops.num_operations; i++, op++) {
 245                 switch(op->type) {
 246                         case OP__SHOW_VC_FIELD:
 247                         case OP__REMOVE_VC_FIELD:
 248                         case OP__REMOVE_VC_FIRSTFIELD:
 249                                 if(0 != op->argument.vc_field_name.value)
 250                                         free(op->argument.vc_field_name.value);
 251                                 break;
 252                         case OP__SET_VC_FIELD:
 253                                 if(0 != op->argument.vc_field.field)
 254                                         free(op->argument.vc_field.field);
 255                                 if(0 != op->argument.vc_field.field_name)
 256                                         free(op->argument.vc_field.field_name);
 257                                 if(0 != op->argument.vc_field.field_value)
 258                                         free(op->argument.vc_field.field_value);
 259                                 break;
 260                         case OP__IMPORT_VC_FROM:
 261                         case OP__EXPORT_VC_TO:
 262                         case OP__EXPORT_CUESHEET_TO:
 263                                 if(0 != op->argument.filename.value)
 264                                         free(op->argument.filename.value);
 265                                 break;
 266                         case OP__IMPORT_CUESHEET_FROM:
 267                                 if(0 != op->argument.import_cuesheet_from.filename)
 268                                         free(op->argument.import_cuesheet_from.filename);
 269                                 break;
 270                         case OP__ADD_SEEKPOINT:
 271                                 if(0 != op->argument.add_seekpoint.specification)
 272                                         free(op->argument.add_seekpoint.specification);
 273                                 break;
 274                         default:
 275                                 break;
 276                 }
 277         }
 278
 279         for(i = 0, arg = options->args.arguments; i < options->args.num_arguments; i++, arg++) {
 280                 switch(arg->type) {
 281                         case ARG__BLOCK_NUMBER:
 282                                 if(0 != arg->value.block_number.entries)
 283                                         free(arg->value.block_number.entries);
 284                                 break;
 285                         case ARG__BLOCK_TYPE:
 286                         case ARG__EXCEPT_BLOCK_TYPE:
 287                                 if(0 != arg->value.block_type.entries)
 288                                         free(arg->value.block_type.entries);
 289                                 break;
 290                         case ARG__FROM_FILE:
 291                                 if(0 != arg->value.from_file.file_name)
 292                                         free(arg->value.from_file.file_name);
 293                                 break;
 294                         default:
 295                                 break;
 296                 }
 297         }
 298
 299         if(0 != options->ops.operations)
 300                 free(options->ops.operations);
 301
 302         if(0 != options->args.arguments)
 303                 free(options->args.arguments);
 304
 305         if(0 != options->filenames) {
 306                 for(i = 0; i < options->num_files; i++) {
 307                         if(0 != options->filenames[i])
 308                                 free(options->filenames[i]);
 309                 }
 310                 free(options->filenames);
 311         }
 312 }
 313
 314 /*
 315  * local routines
 316  */
 317
 318 FLAC__bool parse_option(int option_index, const char *option_argument, CommandLineOptions *options)
 319 {
 320         const char *opt = long_options_[option_index].name;
 321         Operation *op;
 322         Argument *arg;
 323         FLAC__bool ok = true;
 324
 325         if(0 == strcmp(opt, "preserve-modtime")) {
 326                 options->preserve_modtime = true;
 327         }
 328         else if(0 == strcmp(opt, "with-filename")) {
 329                 options->prefix_with_filename = true;
 330         }
 331         else if(0 == strcmp(opt, "no-filename")) {
 332                 options->prefix_with_filename = false;
 333         }
 334         else if(0 == strcmp(opt, "no-utf8-convert")) {
 335                 options->utf8_convert = false;
 336         }
 337         else if(0 == strcmp(opt, "dont-use-padding")) {
 338                 options->use_padding = false;
 339         }
 340         else if(0 == strcmp(opt, "no-cued-seekpoints")) {
 341                 options->cued_seekpoints = false;
 342         }
 343         else if(0 == strcmp(opt, "show-md5sum")) {
 344                 (void) append_shorthand_operation(options, OP__SHOW_MD5SUM);
 345         }
 346         else if(0 == strcmp(opt, "show-min-blocksize")) {
 347                 (void) append_shorthand_operation(options, OP__SHOW_MIN_BLOCKSIZE);
 348         }
 349         else if(0 == strcmp(opt, "show-max-blocksize")) {
 350                 (void) append_shorthand_operation(options, OP__SHOW_MAX_BLOCKSIZE);
 351         }
 352         else if(0 == strcmp(opt, "show-min-framesize")) {
 353                 (void) append_shorthand_operation(options, OP__SHOW_MIN_FRAMESIZE);
 354         }
 355         else if(0 == strcmp(opt, "show-max-framesize")) {
 356                 (void) append_shorthand_operation(options, OP__SHOW_MAX_FRAMESIZE);
 357         }
 358         else if(0 == strcmp(opt, "show-sample-rate")) {
 359                 (void) append_shorthand_operation(options, OP__SHOW_SAMPLE_RATE);
 360         }
 361         else if(0 == strcmp(opt, "show-channels")) {
 362                 (void) append_shorthand_operation(options, OP__SHOW_CHANNELS);
 363         }
 364         else if(0 == strcmp(opt, "show-bps")) {
 365                 (void) append_shorthand_operation(options, OP__SHOW_BPS);
 366         }
 367         else if(0 == strcmp(opt, "show-total-samples")) {
 368                 (void) append_shorthand_operation(options, OP__SHOW_TOTAL_SAMPLES);
 369         }
 370         else if(0 == strcmp(opt, "set-md5sum")) {
 371                 op = append_shorthand_operation(options, OP__SET_MD5SUM);
 372                 FLAC__ASSERT(0 != option_argument);
 373                 if(!parse_md5(option_argument, op->argument.streaminfo_md5.value)) {
 374                         fprintf(stderr, "ERROR (--%s): bad MD5 sum\n", opt);
 375                         ok = false;
 376                 }
 377                 else
 378                         undocumented_warning(opt);
 379         }
 380         else if(0 == strcmp(opt, "set-min-blocksize")) {
 381                 op = append_shorthand_operation(options, OP__SET_MIN_BLOCKSIZE);
 382                 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) {
 383                         fprintf(stderr, "ERROR (--%s): value must be >= %u and <= %u\n", opt, FLAC__MIN_BLOCK_SIZE, FLAC__MAX_BLOCK_SIZE);
 384                         ok = false;
 385                 }
 386                 else
 387                         undocumented_warning(opt);
 388         }
 389         else if(0 == strcmp(opt, "set-max-blocksize")) {
 390                 op = append_shorthand_operation(options, OP__SET_MAX_BLOCKSIZE);
 391                 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) {
 392                         fprintf(stderr, "ERROR (--%s): value must be >= %u and <= %u\n", opt, FLAC__MIN_BLOCK_SIZE, FLAC__MAX_BLOCK_SIZE);
 393                         ok = false;
 394                 }
 395                 else
 396                         undocumented_warning(opt);
 397         }
 398         else if(0 == strcmp(opt, "set-min-framesize")) {
 399                 op = append_shorthand_operation(options, OP__SET_MIN_FRAMESIZE);
 400                 if(!parse_uint32(option_argument, &(op->argument.streaminfo_uint32.value)) || op->argument.streaminfo_uint32.value >= (1u<<FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN)) {
 401                         fprintf(stderr, "ERROR (--%s): value must be a %u-bit unsigned integer\n", opt, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN);
 402                         ok = false;
 403                 }
 404                 else
 405                         undocumented_warning(opt);
 406         }
 407         else if(0 == strcmp(opt, "set-max-framesize")) {
 408                 op = append_shorthand_operation(options, OP__SET_MAX_FRAMESIZE);
 409                 if(!parse_uint32(option_argument, &(op->argument.streaminfo_uint32.value)) || op->argument.streaminfo_uint32.value >= (1u<<FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN)) {
 410                         fprintf(stderr, "ERROR (--%s): value must be a %u-bit unsigned integer\n", opt, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN);
 411                         ok = false;
 412                 }
 413                 else
 414                         undocumented_warning(opt);
 415         }
 416         else if(0 == strcmp(opt, "set-sample-rate")) {
 417                 op = append_shorthand_operation(options, OP__SET_SAMPLE_RATE);
 418                 if(!parse_uint32(option_argument, &(op->argument.streaminfo_uint32.value)) || !FLAC__format_sample_rate_is_valid(op->argument.streaminfo_uint32.value)) {
 419                         fprintf(stderr, "ERROR (--%s): invalid sample rate\n", opt);
 420                         ok = false;
 421                 }
 422                 else
 423                         undocumented_warning(opt);
 424         }
 425         else if(0 == strcmp(opt, "set-channels")) {
 426                 op = append_shorthand_operation(options, OP__SET_CHANNELS);
 427                 if(!parse_uint32(option_argument, &(op->argument.streaminfo_uint32.value)) || op->argument.streaminfo_uint32.value > FLAC__MAX_CHANNELS) {
 428                         fprintf(stderr, "ERROR (--%s): value must be > 0 and <= %u\n", opt, FLAC__MAX_CHANNELS);
 429                         ok = false;
 430                 }
 431                 else
 432                         undocumented_warning(opt);
 433         }
 434         else if(0 == strcmp(opt, "set-bps")) {
 435                 op = append_shorthand_operation(options, OP__SET_BPS);
 436                 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) {
 437                         fprintf(stderr, "ERROR (--%s): value must be >= %u and <= %u\n", opt, FLAC__MIN_BITS_PER_SAMPLE, FLAC__MAX_BITS_PER_SAMPLE);
 438                         ok = false;
 439                 }
 440                 else
 441                         undocumented_warning(opt);
 442         }
 443         else if(0 == strcmp(opt, "set-total-samples")) {
 444                 op = append_shorthand_operation(options, OP__SET_TOTAL_SAMPLES);
 445                 if(!parse_uint64(option_argument, &(op->argument.streaminfo_uint64.value)) || op->argument.streaminfo_uint64.value >= (1u<<FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN)) {
 446                         fprintf(stderr, "ERROR (--%s): value must be a %u-bit unsigned integer\n", opt, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN);
 447                         ok = false;
 448                 }
 449                 else
 450                         undocumented_warning(opt);
 451         }
 452         else if(0 == strcmp(opt, "show-vendor-tag") || 0 == strcmp(opt, "show-vc-vendor")) {
 453                 if(0 == strcmp(opt, "show-vc-vendor"))
 454                         fprintf(stderr, "WARNING: --%s is deprecated, the new name is --show-vendor-tag\n", opt);
 455                 (void) append_shorthand_operation(options, OP__SHOW_VC_VENDOR);
 456         }
 457         else if(0 == strcmp(opt, "show-tag") || 0 == strcmp(opt, "show-vc-field")) {
 458                 const char *violation;
 459                 if(0 == strcmp(opt, "show-vc-field"))
 460                         fprintf(stderr, "WARNING: --%s is deprecated, the new name is --show-tag\n", opt);
 461                 op = append_shorthand_operation(options, OP__SHOW_VC_FIELD);
 462                 FLAC__ASSERT(0 != option_argument);
 463                 if(!parse_vorbis_comment_field_name(option_argument, &(op->argument.vc_field_name.value), &violation)) {
 464                         FLAC__ASSERT(0 != violation);
 465                         fprintf(stderr, "ERROR (--%s): malformed vorbis comment field name \"%s\",\n       %s\n", opt, option_argument, violation);
 466                         ok = false;
 467                 }
 468         }
 469         else if(0 == strcmp(opt, "remove-all-tags") || 0 == strcmp(opt, "remove-vc-all")) {
 470                 if(0 == strcmp(opt, "remove-vc-all"))
 471                         fprintf(stderr, "WARNING: --%s is deprecated, the new name is --remove-all-tags\n", opt);
 472                 (void) append_shorthand_operation(options, OP__REMOVE_VC_ALL);
 473         }
 474         else if(0 == strcmp(opt, "remove-tag") || 0 == strcmp(opt, "remove-vc-field")) {
 475                 const char *violation;
 476                 if(0 == strcmp(opt, "remove-vc-field"))
 477                         fprintf(stderr, "WARNING: --%s is deprecated, the new name is --remove-tag\n", opt);
 478                 op = append_shorthand_operation(options, OP__REMOVE_VC_FIELD);
 479                 FLAC__ASSERT(0 != option_argument);
 480                 if(!parse_vorbis_comment_field_name(option_argument, &(op->argument.vc_field_name.value), &violation)) {
 481                         FLAC__ASSERT(0 != violation);
 482                         fprintf(stderr, "ERROR (--%s): malformed vorbis comment field name \"%s\",\n       %s\n", opt, option_argument, violation);
 483                         ok = false;
 484                 }
 485         }
 486         else if(0 == strcmp(opt, "remove-first-tag") || 0 == strcmp(opt, "remove-vc-firstfield")) {
 487                 const char *violation;
 488                 if(0 == strcmp(opt, "remove-vc-firstfield"))
 489                         fprintf(stderr, "WARNING: --%s is deprecated, the new name is --remove-first-tag\n", opt);
 490                 op = append_shorthand_operation(options, OP__REMOVE_VC_FIRSTFIELD);
 491                 FLAC__ASSERT(0 != option_argument);
 492                 if(!parse_vorbis_comment_field_name(option_argument, &(op->argument.vc_field_name.value), &violation)) {
 493                         FLAC__ASSERT(0 != violation);
 494                         fprintf(stderr, "ERROR (--%s): malformed vorbis comment field name \"%s\",\n       %s\n", opt, option_argument, violation);
 495                         ok = false;
 496                 }
 497         }
 498         else if(0 == strcmp(opt, "set-tag") || 0 == strcmp(opt, "set-vc-field")) {
 499                 const char *violation;
 500                 if(0 == strcmp(opt, "set-vc-field"))
 501                         fprintf(stderr, "WARNING: --%s is deprecated, the new name is --set-tag\n", opt);
 502                 op = append_shorthand_operation(options, OP__SET_VC_FIELD);
 503                 FLAC__ASSERT(0 != option_argument);
 504                 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)) {
 505                         FLAC__ASSERT(0 != violation);
 506                         fprintf(stderr, "ERROR (--%s): malformed vorbis comment field \"%s\",\n       %s\n", opt, option_argument, violation);
 507                         ok = false;
 508                 }
 509         }
 510         else if(0 == strcmp(opt, "import-tags-from") || 0 == strcmp(opt, "import-vc-from")) {
 511                 if(0 == strcmp(opt, "import-vc-from"))
 512                         fprintf(stderr, "WARNING: --%s is deprecated, the new name is --import-tags-from\n", opt);
 513                 op = append_shorthand_operation(options, OP__IMPORT_VC_FROM);
 514                 FLAC__ASSERT(0 != option_argument);
 515                 if(!parse_filename(option_argument, &(op->argument.filename.value))) {
 516                         fprintf(stderr, "ERROR (--%s): missing filename\n", opt);
 517                         ok = false;
 518                 }
 519         }
 520         else if(0 == strcmp(opt, "export-tags-to") || 0 == strcmp(opt, "export-vc-to")) {
 521                 if(0 == strcmp(opt, "export-vc-to"))
 522                         fprintf(stderr, "WARNING: --%s is deprecated, the new name is --export-tags-to\n", opt);
 523                 op = append_shorthand_operation(options, OP__EXPORT_VC_TO);
 524                 FLAC__ASSERT(0 != option_argument);
 525                 if(!parse_filename(option_argument, &(op->argument.filename.value))) {
 526                         fprintf(stderr, "ERROR (--%s): missing filename\n", opt);
 527                         ok = false;
 528                 }
 529         }
 530         else if(0 == strcmp(opt, "import-cuesheet-from")) {
 531                 if(0 != find_shorthand_operation(options, OP__IMPORT_CUESHEET_FROM)) {
 532                         fprintf(stderr, "ERROR (--%s): may be specified only once\n", opt);
 533                         ok = false;
 534                 }
 535                 op = append_shorthand_operation(options, OP__IMPORT_CUESHEET_FROM);
 536                 FLAC__ASSERT(0 != option_argument);
 537                 if(!parse_filename(option_argument, &(op->argument.import_cuesheet_from.filename))) {
 538                         fprintf(stderr, "ERROR (--%s): missing filename\n", opt);
 539                         ok = false;
 540                 }
 541         }
 542         else if(0 == strcmp(opt, "export-cuesheet-to")) {
 543                 op = append_shorthand_operation(options, OP__EXPORT_CUESHEET_TO);
 544                 FLAC__ASSERT(0 != option_argument);
 545                 if(!parse_filename(option_argument, &(op->argument.filename.value))) {
 546                         fprintf(stderr, "ERROR (--%s): missing filename\n", opt);
 547                         ok = false;
 548                 }
 549         }
 550         else if(0 == strcmp(opt, "add-seekpoint")) {
 551                 const char *violation;
 552                 char *spec;
 553                 FLAC__ASSERT(0 != option_argument);
 554                 if(!parse_add_seekpoint(option_argument, &spec, &violation)) {
 555                         FLAC__ASSERT(0 != violation);
 556                         fprintf(stderr, "ERROR (--%s): malformed seekpoint specification \"%s\",\n       %s\n", opt, option_argument, violation);
 557                         ok = false;
 558                 }
 559                 op = find_shorthand_operation(options, OP__ADD_SEEKPOINT);
 560                 if(0 == op)
 561                         op = append_shorthand_operation(options, OP__ADD_SEEKPOINT);
 562                 local_strcat(&(op->argument.add_seekpoint.specification), spec);
 563                 local_strcat(&(op->argument.add_seekpoint.specification), ";");
 564                 free(spec);
 565         }
 566         else if(0 == strcmp(opt, "add-replay-gain")) {
 567                 (void) append_shorthand_operation(options, OP__ADD_REPLAY_GAIN);
 568         }
 569         else if(0 == strcmp(opt, "add-padding")) {
 570                 op = append_shorthand_operation(options, OP__ADD_PADDING);
 571                 FLAC__ASSERT(0 != option_argument);
 572                 if(!parse_add_padding(option_argument, &(op->argument.add_padding.length))) {
 573                         fprintf(stderr, "ERROR (--%s): illegal length \"%s\", length must be >= 0 and < 2^%u\n", opt, option_argument, FLAC__STREAM_METADATA_LENGTH_LEN);
 574                         ok = false;
 575                 }
 576         }
 577         else if(0 == strcmp(opt, "help")) {
 578                 options->show_long_help = true;
 579         }
 580         else if(0 == strcmp(opt, "version")) {
 581                 options->show_version = true;
 582         }
 583         else if(0 == strcmp(opt, "list")) {
 584                 (void) append_major_operation(options, OP__LIST);
 585         }
 586         else if(0 == strcmp(opt, "append")) {
 587                 (void) append_major_operation(options, OP__APPEND);
 588         }
 589         else if(0 == strcmp(opt, "remove")) {
 590                 (void) append_major_operation(options, OP__REMOVE);
 591         }
 592         else if(0 == strcmp(opt, "remove-all")) {
 593                 (void) append_major_operation(options, OP__REMOVE_ALL);
 594         }
 595         else if(0 == strcmp(opt, "merge-padding")) {
 596                 (void) append_major_operation(options, OP__MERGE_PADDING);
 597         }
 598         else if(0 == strcmp(opt, "sort-padding")) {
 599                 (void) append_major_operation(options, OP__SORT_PADDING);
 600         }
 601         else if(0 == strcmp(opt, "block-number")) {
 602                 arg = append_argument(options, ARG__BLOCK_NUMBER);
 603                 FLAC__ASSERT(0 != option_argument);
 604                 if(!parse_block_number(option_argument, &(arg->value.block_number))) {
 605                         fprintf(stderr, "ERROR: malformed block number specification \"%s\"\n", option_argument);
 606                         ok = false;
 607                 }
 608         }
 609         else if(0 == strcmp(opt, "block-type")) {
 610                 arg = append_argument(options, ARG__BLOCK_TYPE);
 611                 FLAC__ASSERT(0 != option_argument);
 612                 if(!parse_block_type(option_argument, &(arg->value.block_type))) {
 613                         fprintf(stderr, "ERROR (--%s): malformed block type specification \"%s\"\n", opt, option_argument);
 614                         ok = false;
 615                 }
 616                 options->args.checks.has_block_type = true;
 617         }
 618         else if(0 == strcmp(opt, "except-block-type")) {
 619                 arg = append_argument(options, ARG__EXCEPT_BLOCK_TYPE);
 620                 FLAC__ASSERT(0 != option_argument);
 621                 if(!parse_block_type(option_argument, &(arg->value.block_type))) {
 622                         fprintf(stderr, "ERROR (--%s): malformed block type specification \"%s\"\n", opt, option_argument);
 623                         ok = false;
 624                 }
 625                 options->args.checks.has_except_block_type = true;
 626         }
 627         else if(0 == strcmp(opt, "data-format")) {
 628                 arg = append_argument(options, ARG__DATA_FORMAT);
 629                 FLAC__ASSERT(0 != option_argument);
 630                 if(!parse_data_format(option_argument, &(arg->value.data_format))) {
 631                         fprintf(stderr, "ERROR (--%s): illegal data format \"%s\"\n", opt, option_argument);
 632                         ok = false;
 633                 }
 634         }
 635         else if(0 == strcmp(opt, "application-data-format")) {
 636                 FLAC__ASSERT(0 != option_argument);
 637                 if(!parse_application_data_format(option_argument, &(options->application_data_format_is_hexdump))) {
 638                         fprintf(stderr, "ERROR (--%s): illegal application data format \"%s\"\n", opt, option_argument);
 639                         ok = false;
 640                 }
 641         }
 642         else if(0 == strcmp(opt, "from-file")) {
 643                 arg = append_argument(options, ARG__FROM_FILE);
 644                 FLAC__ASSERT(0 != option_argument);
 645                 arg->value.from_file.file_name = local_strdup(option_argument);
 646         }
 647         else {
 648                 FLAC__ASSERT(0);
 649         }
 650
 651         return ok;
 652 }
 653
 654 void append_new_operation(CommandLineOptions *options, Operation operation)
 655 {
 656         if(options->ops.capacity == 0) {
 657                 options->ops.capacity = 50;
 658                 if(0 == (options->ops.operations = (Operation*)malloc(sizeof(Operation) * options->ops.capacity)))
 659                         die("out of memory allocating space for option list");
 660                 memset(options->ops.operations, 0, sizeof(Operation) * options->ops.capacity);
 661         }
 662         if(options->ops.capacity <= options->ops.num_operations) {
 663                 unsigned original_capacity = options->ops.capacity;
 664                 options->ops.capacity *= 4;
 665                 if(0 == (options->ops.operations = (Operation*)realloc(options->ops.operations, sizeof(Operation) * options->ops.capacity)))
 666                         die("out of memory allocating space for option list");
 667                 memset(options->ops.operations + original_capacity, 0, sizeof(Operation) * (options->ops.capacity - original_capacity));
 668         }
 669
 670         options->ops.operations[options->ops.num_operations++] = operation;
 671 }
 672
 673 void append_new_argument(CommandLineOptions *options, Argument argument)
 674 {
 675         if(options->args.capacity == 0) {
 676                 options->args.capacity = 50;
 677                 if(0 == (options->args.arguments = (Argument*)malloc(sizeof(Argument) * options->args.capacity)))
 678                         die("out of memory allocating space for option list");
 679                 memset(options->args.arguments, 0, sizeof(Argument) * options->args.capacity);
 680         }
 681         if(options->args.capacity <= options->args.num_arguments) {
 682                 unsigned original_capacity = options->args.capacity;
 683                 options->args.capacity *= 4;
 684                 if(0 == (options->args.arguments = (Argument*)realloc(options->args.arguments, sizeof(Argument) * options->args.capacity)))
 685                         die("out of memory allocating space for option list");
 686                 memset(options->args.arguments + original_capacity, 0, sizeof(Argument) * (options->args.capacity - original_capacity));
 687         }
 688
 689         options->args.arguments[options->args.num_arguments++] = argument;
 690 }
 691
 692 Operation *append_major_operation(CommandLineOptions *options, OperationType type)
 693 {
 694         Operation op;
 695         memset(&op, 0, sizeof(op));
 696         op.type = type;
 697         append_new_operation(options, op);
 698         options->args.checks.num_major_ops++;
 699         return options->ops.operations + (options->ops.num_operations - 1);
 700 }
 701
 702 Operation *append_shorthand_operation(CommandLineOptions *options, OperationType type)
 703 {
 704         Operation op;
 705         memset(&op, 0, sizeof(op));
 706         op.type = type;
 707         append_new_operation(options, op);
 708         options->args.checks.num_shorthand_ops++;
 709         return options->ops.operations + (options->ops.num_operations - 1);
 710 }
 711
 712 Operation *find_shorthand_operation(CommandLineOptions *options, OperationType type)
 713 {
 714         unsigned i;
 715         for(i = 0; i < options->ops.num_operations; i++)
 716                 if(options->ops.operations[i].type == type)
 717                         return &options->ops.operations[i];
 718         return 0;
 719 }
 720
 721 Argument *append_argument(CommandLineOptions *options, ArgumentType type)
 722 {
 723         Argument arg;
 724         memset(&arg, 0, sizeof(arg));
 725         arg.type = type;
 726         append_new_argument(options, arg);
 727         return options->args.arguments + (options->args.num_arguments - 1);
 728 }
 729
 730 FLAC__bool parse_md5(const char *src, FLAC__byte dest[16])
 731 {
 732         unsigned i, d;
 733         int c;
 734         FLAC__ASSERT(0 != src);
 735         if(strlen(src) != 32)
 736                 return false;
 737         /* strtoul() accepts negative numbers which we do not want, so we do it the hard way */
 738         for(i = 0; i < 16; i++) {
 739                 c = (int)(*src++);
 740                 if(isdigit(c))
 741                         d = (unsigned)(c - '0');
 742                 else if(c >= 'a' && c <= 'f')
 743                         d = (unsigned)(c - 'a') + 10u;
 744                 else if(c >= 'A' && c <= 'F')
 745                         d = (unsigned)(c - 'A') + 10u;
 746                 else
 747                         return false;
 748                 d <<= 4;
 749                 c = (int)(*src++);
 750                 if(isdigit(c))
 751                         d |= (unsigned)(c - '0');
 752                 else if(c >= 'a' && c <= 'f')
 753                         d |= (unsigned)(c - 'a') + 10u;
 754                 else if(c >= 'A' && c <= 'F')
 755                         d |= (unsigned)(c - 'A') + 10u;
 756                 else
 757                         return false;
 758                 dest[i] = (FLAC__byte)d;
 759         }
 760         return true;
 761 }
 762
 763 FLAC__bool parse_uint32(const char *src, FLAC__uint32 *dest)
 764 {
 765         FLAC__ASSERT(0 != src);
 766         if(strlen(src) == 0 || strspn(src, "0123456789") != strlen(src))
 767                 return false;
 768         *dest = strtoul(src, 0, 10);
 769         return true;
 770 }
 771
 772 /* There's no stroull() in MSVC6 so we just write a specialized one */
 773 static FLAC__uint64 local__strtoull(const char *src)
 774 {
 775         FLAC__uint64 ret = 0;
 776         int c;
 777         FLAC__ASSERT(0 != src);
 778         while(0 != (c = *src++)) {
 779                 c -= '0';
 780                 if(c >= 0 && c <= 9)
 781                         ret = (ret * 10) + c;
 782                 else
 783                         break;
 784         }
 785         return ret;
 786 }
 787
 788 FLAC__bool parse_uint64(const char *src, FLAC__uint64 *dest)
 789 {
 790         FLAC__ASSERT(0 != src);
 791         if(strlen(src) == 0 || strspn(src, "0123456789") != strlen(src))
 792                 return false;
 793         *dest = local__strtoull(src);
 794         return true;
 795 }
 796
 797 FLAC__bool parse_filename(const char *src, char **dest)
 798 {
 799         if(0 == src || strlen(src) == 0)
 800                 return false;
 801         *dest = strdup(src);
 802         return true;
 803 }
 804
 805 FLAC__bool parse_vorbis_comment_field_name(const char *field_ref, char **name, const char **violation)
 806 {
 807         static const char * const violations[] = {
 808                 "field name contains invalid character"
 809         };
 810
 811         char *q, *s;
 812
 813         s = local_strdup(field_ref);
 814
 815         for(q = s; *q; q++) {
 816                 if(*q < 0x20 || *q > 0x7d || *q == 0x3d) {
 817                         free(s);
 818                         *violation = violations[0];
 819                         return false;
 820                 }
 821         }
 822
 823         *name = s;
 824
 825         return true;
 826 }
 827
 828 FLAC__bool parse_add_seekpoint(const char *in, char **out, const char **violation)
 829 {
 830         static const char *garbled_ = "garbled specification";
 831         const unsigned n = strlen(in);
 832
 833         FLAC__ASSERT(0 != in);
 834         FLAC__ASSERT(0 != out);
 835
 836         if(n == 0) {
 837                 *violation = "specification is empty";
 838                 return false;
 839         }
 840
 841         if(n > strspn(in, "0123456789.Xsx")) {
 842                 *violation = "specification contains invalid character";
 843                 return false;
 844         }
 845
 846         if(in[n-1] == 'X') {
 847                 if(n > 1) {
 848                         *violation = garbled_;
 849                         return false;
 850                 }
 851         }
 852         else if(in[n-1] == 's') {
 853                 if(n-1 > strspn(in, "0123456789.")) {
 854                         *violation = garbled_;
 855                         return false;
 856                 }
 857         }
 858         else if(in[n-1] == 'x') {
 859                 if(n-1 > strspn(in, "0123456789")) {
 860                         *violation = garbled_;
 861                         return false;
 862                 }
 863         }
 864         else {
 865                 if(n > strspn(in, "0123456789")) {
 866                         *violation = garbled_;
 867                         return false;
 868                 }
 869         }
 870
 871         *out = local_strdup(in);
 872         return true;
 873 }
 874
 875 FLAC__bool parse_add_padding(const char *in, unsigned *out)
 876 {
 877         FLAC__ASSERT(0 != in);
 878         FLAC__ASSERT(0 != out);
 879         *out = (unsigned)strtoul(in, 0, 10);
 880         return *out < (1u << FLAC__STREAM_METADATA_LENGTH_LEN);
 881 }
 882
 883 FLAC__bool parse_block_number(const char *in, Argument_BlockNumber *out)
 884 {
 885         char *p, *q, *s, *end;
 886         long i;
 887         unsigned entry;
 888
 889         if(*in == '\0')
 890                 return false;
 891
 892         s = local_strdup(in);
 893
 894         /* first count the entries */
 895         for(out->num_entries = 1, p = strchr(s, ','); p; out->num_entries++, p = strchr(++p, ','))
 896                 ;
 897
 898         /* make space */
 899         FLAC__ASSERT(out->num_entries > 0);
 900         if(0 == (out->entries = (unsigned*)malloc(sizeof(unsigned) * out->num_entries)))
 901                 die("out of memory allocating space for option list");
 902
 903         /* load 'em up */
 904         entry = 0;
 905         q = s;
 906         while(q) {
 907                 FLAC__ASSERT(entry < out->num_entries);
 908                 if(0 != (p = strchr(q, ',')))
 909                         *p++ = '\0';
 910                 if(!isdigit((int)(*q)) || (i = strtol(q, &end, 10)) < 0 || *end) {
 911                         free(s);
 912                         return false;
 913                 }
 914                 out->entries[entry++] = (unsigned)i;
 915                 q = p;
 916         }
 917         FLAC__ASSERT(entry == out->num_entries);
 918
 919         free(s);
 920         return true;
 921 }
 922
 923 FLAC__bool parse_block_type(const char *in, Argument_BlockType *out)
 924 {
 925         char *p, *q, *r, *s;
 926         unsigned entry;
 927
 928         if(*in == '\0')
 929                 return false;
 930
 931         s = local_strdup(in);
 932
 933         /* first count the entries */
 934         for(out->num_entries = 1, p = strchr(s, ','); p; out->num_entries++, p = strchr(++p, ','))
 935                 ;
 936
 937         /* make space */
 938         FLAC__ASSERT(out->num_entries > 0);
 939         if(0 == (out->entries = (Argument_BlockTypeEntry*)malloc(sizeof(Argument_BlockTypeEntry) * out->num_entries)))
 940                 die("out of memory allocating space for option list");
 941
 942         /* load 'em up */
 943         entry = 0;
 944         q = s;
 945         while(q) {
 946                 FLAC__ASSERT(entry < out->num_entries);
 947                 if(0 != (p = strchr(q, ',')))
 948                         *p++ = 0;
 949                 r = strchr(q, ':');
 950                 if(r)
 951                         *r++ = '\0';
 952                 if(0 != r && 0 != strcmp(q, "APPLICATION")) {
 953                         free(s);
 954                         return false;
 955                 }
 956                 if(0 == strcmp(q, "STREAMINFO")) {
 957                         out->entries[entry++].type = FLAC__METADATA_TYPE_STREAMINFO;
 958                 }
 959                 else if(0 == strcmp(q, "PADDING")) {
 960                         out->entries[entry++].type = FLAC__METADATA_TYPE_PADDING;
 961                 }
 962                 else if(0 == strcmp(q, "APPLICATION")) {
 963                         out->entries[entry].type = FLAC__METADATA_TYPE_APPLICATION;
 964                         out->entries[entry].filter_application_by_id = (0 != r);
 965                         if(0 != r) {
 966                                 if(strlen(r) == 4) {
 967                                         strcpy(out->entries[entry].application_id, r);
 968                                 }
 969                                 else if(strlen(r) == 10 && strncmp(r, "0x", 2) == 0 && strspn(r+2, "0123456789ABCDEFabcdef") == 8) {
 970                                         FLAC__uint32 x = strtoul(r+2, 0, 16);
 971                                         out->entries[entry].application_id[3] = (FLAC__byte)(x & 0xff);
 972                                         out->entries[entry].application_id[2] = (FLAC__byte)((x>>=8) & 0xff);
 973                                         out->entries[entry].application_id[1] = (FLAC__byte)((x>>=8) & 0xff);
 974                                         out->entries[entry].application_id[0] = (FLAC__byte)((x>>=8) & 0xff);
 975                                 }
 976                                 else {
 977                                         free(s);
 978                                         return false;
 979                                 }
 980                         }
 981                         entry++;
 982                 }
 983                 else if(0 == strcmp(q, "SEEKTABLE")) {
 984                         out->entries[entry++].type = FLAC__METADATA_TYPE_SEEKTABLE;
 985                 }
 986                 else if(0 == strcmp(q, "VORBIS_COMMENT")) {
 987                         out->entries[entry++].type = FLAC__METADATA_TYPE_VORBIS_COMMENT;
 988                 }
 989                 else if(0 == strcmp(q, "CUESHEET")) {
 990                         out->entries[entry++].type = FLAC__METADATA_TYPE_CUESHEET;
 991                 }
 992                 else {
 993                         free(s);
 994                         return false;
 995                 }
 996                 q = p;
 997         }
 998         FLAC__ASSERT(entry == out->num_entries);
 999
1000         free(s);
1001         return true;
1002 }
1003
1004 FLAC__bool parse_data_format(const char *in, Argument_DataFormat *out)
1005 {
1006         if(0 == strcmp(in, "binary"))
1007                 out->is_binary = true;
1008         else if(0 == strcmp(in, "text"))
1009                 out->is_binary = false;
1010         else
1011                 return false;
1012         return true;
1013 }
1014
1015 FLAC__bool parse_application_data_format(const char *in, FLAC__bool *out)
1016 {
1017         if(0 == strcmp(in, "hexdump"))
1018                 *out = true;
1019         else if(0 == strcmp(in, "text"))
1020                 *out = false;
1021         else
1022                 return false;
1023         return true;
1024 }
1025
1026 void undocumented_warning(const char *opt)
1027 {
1028         fprintf(stderr, "WARNING: undocmented option --%s should be used with caution,\n         only for repairing a damaged STREAMINFO block\n", opt);
1029 }