apps/metadata.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 Dave Chapman
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <ctype.h>
  24 #include "string-extra.h"
  25
  26 #include "debug.h"
  27 #include "logf.h"
  28 #include "settings.h"
  29 #include "cuesheet.h"
  30 #include "metadata.h"
  31
  32 #include "metadata/metadata_parsers.h"
  33
  34 #if CONFIG_CODEC == SWCODEC
  35
  36 /* For trailing tag stripping and base audio data types */
  37 #include "buffering.h"
  38
  39 #include "metadata/metadata_common.h"
  40
  41 static bool get_shn_metadata(int fd, struct mp3entry *id3)
  42 {
  43     /* TODO: read the id3v2 header if it exists */
  44     id3->vbr = true;
  45     id3->filesize = filesize(fd);
  46     return skip_id3v2(fd, id3);
  47 }
  48
  49 static bool get_other_asap_metadata(int fd, struct mp3entry *id3)
  50 {
  51     id3->bitrate = 706;
  52     id3->frequency = 44100;
  53     id3->vbr = false;
  54     id3->filesize = filesize(fd);
  55     id3->genre_string = id3_get_num_genre(36);
  56     return true;
  57 }
  58 #endif /* CONFIG_CODEC == SWCODEC */
  59 bool write_metadata_log = false;
  60
  61 const struct afmt_entry audio_formats[AFMT_NUM_CODECS] =
  62 {
  63     /* Unknown file format */
  64     [AFMT_UNKNOWN] =
  65         AFMT_ENTRY("???", NULL,    NULL,        NULL, NULL  ),
  66
  67     /* MPEG Audio layer 1 */
  68     [AFMT_MPA_L1] =
  69         AFMT_ENTRY("MP1",   "mpa",  NULL,       get_mp3_metadata,   "mp1\0"),
  70     /* MPEG Audio layer 2 */
  71     [AFMT_MPA_L2] =
  72         AFMT_ENTRY("MP2",   "mpa",  NULL,       get_mp3_metadata,   "mpa\0mp2\0"),
  73     /* MPEG Audio layer 3 */
  74     [AFMT_MPA_L3] =
  75         AFMT_ENTRY("MP3",   "mpa",  "mp3_enc",  get_mp3_metadata,   "mp3\0"),
  76
  77 #if CONFIG_CODEC == SWCODEC
  78     /* Audio Interchange File Format */
  79     [AFMT_AIFF] =
  80         AFMT_ENTRY("AIFF",  "aiff", "aiff_enc", get_aiff_metadata,  "aiff\0aif\0"),
  81     /* Uncompressed PCM in a WAV file OR ATRAC3 stream in WAV file (.at3) */
  82     [AFMT_PCM_WAV] =
  83         AFMT_ENTRY("WAV",   "wav",  "wav_enc",  get_wave_metadata,  "wav\0at3\0"),
  84     /* Ogg Vorbis */
  85     [AFMT_OGG_VORBIS] =
  86         AFMT_ENTRY("Ogg", "vorbis", NULL,       get_ogg_metadata,   "ogg\0oga\0"),
  87     /* FLAC */
  88     [AFMT_FLAC] =
  89         AFMT_ENTRY("FLAC",  "flac", NULL,       get_flac_metadata,  "flac\0"),
  90     /* Musepack SV7 */
  91     [AFMT_MPC_SV7] =
  92         AFMT_ENTRY("MPCv7", "mpc",  NULL,       get_musepack_metadata,"mpc\0"),
  93     /* A/52 (aka AC3) audio */
  94     [AFMT_A52] =
  95         AFMT_ENTRY("AC3",   "a52",  NULL,       get_a52_metadata,   "a52\0ac3\0"),
  96     /* WavPack */
  97     [AFMT_WAVPACK] =
  98         AFMT_ENTRY("WV","wavpack","wavpack_enc",get_wavpack_metadata,"wv\0"),
  99     /* Apple Lossless Audio Codec */
 100     [AFMT_MP4_ALAC] =
 101         AFMT_ENTRY("ALAC",  "alac", NULL,       get_mp4_metadata,   "m4a\0m4b\0"),
 102     /* Advanced Audio Coding in M4A container */
 103     [AFMT_MP4_AAC] =
 104         AFMT_ENTRY("AAC",   "aac",  NULL,       get_mp4_metadata,   "mp4\0"),
 105     /* Shorten */
 106     [AFMT_SHN] =
 107         AFMT_ENTRY("SHN","shorten", NULL,       get_shn_metadata,   "shn\0"),
 108     /* SID File Format */
 109     [AFMT_SID] =
 110         AFMT_ENTRY("SID",   "sid",  NULL,       get_sid_metadata,   "sid\0"),
 111     /* ADX File Format */
 112     [AFMT_ADX] =
 113         AFMT_ENTRY("ADX",   "adx",  NULL,       get_adx_metadata,   "adx\0"),
 114     /* NESM (NES Sound Format) */
 115     [AFMT_NSF] =
 116         AFMT_ENTRY("NSF",   "nsf",  NULL,       get_nsf_metadata,   "nsf\0nsfe\0"),
 117     /* Speex File Format */
 118     [AFMT_SPEEX] =
 119         AFMT_ENTRY("Speex", "speex",NULL,       get_ogg_metadata,   "spx\0"),
 120     /* SPC700 Save State */
 121     [AFMT_SPC] =
 122         AFMT_ENTRY("SPC",   "spc",  NULL,       get_spc_metadata,   "spc\0"),
 123     /* APE (Monkey's Audio) */
 124     [AFMT_APE] =
 125         AFMT_ENTRY("APE",   "ape",  NULL,       get_monkeys_metadata,"ape\0mac\0"),
 126     /* WMA (WMAV1/V2 in ASF) */
 127     [AFMT_WMA] =
 128         AFMT_ENTRY("WMA",   "wma",  NULL,       get_asf_metadata,"wma\0wmv\0asf\0"),
 129     /* WMA Professional in ASF */
 130     [AFMT_WMAPRO] =
 131         AFMT_ENTRY("WMAPro","wmapro",NULL,      NULL,            "wma\0wmv\0asf\0"),
 132     /* Amiga MOD File */
 133     [AFMT_MOD] =
 134         AFMT_ENTRY("MOD",   "mod",  NULL,       get_mod_metadata,   "mod\0"),
 135     /* Atari SAP File */
 136     [AFMT_SAP] =
 137         AFMT_ENTRY("SAP",   "asap", NULL,       get_asap_metadata,  "sap\0"),
 138     /* Cook in RM/RA */
 139     [AFMT_RM_COOK] =
 140         AFMT_ENTRY("Cook",  "cook", NULL,       get_rm_metadata,"rm\0ra\0rmvb\0"),
 141     /* AAC in RM/RA */
 142     [AFMT_RM_AAC] =
 143         AFMT_ENTRY("RAAC",  "raac", NULL,       NULL,           "rm\0ra\0rmvb\0"),
 144     /* AC3 in RM/RA */
 145     [AFMT_RM_AC3] =
 146         AFMT_ENTRY("AC3", "a52_rm", NULL,       NULL,           "rm\0ra\0rmvb\0"),
 147     /* ATRAC3 in RM/RA */
 148     [AFMT_RM_ATRAC3] =
 149         AFMT_ENTRY("ATRAC3","atrac3_rm",NULL,   NULL,           "rm\0ra\0rmvb\0"),
 150     /* Atari CMC File */
 151     [AFMT_CMC] =
 152         AFMT_ENTRY("CMC",   "asap", NULL,       get_other_asap_metadata,"cmc\0"),
 153     /* Atari CM3 File */
 154     [AFMT_CM3] =
 155         AFMT_ENTRY("CM3",   "asap", NULL,       get_other_asap_metadata,"cm3\0"),
 156     /* Atari CMR File */
 157     [AFMT_CMR] =
 158         AFMT_ENTRY("CMR",   "asap", NULL,       get_other_asap_metadata,"cmr\0"),
 159     /* Atari CMS File */
 160     [AFMT_CMS] =
 161         AFMT_ENTRY("CMS",   "asap", NULL,       get_other_asap_metadata,"cms\0"),
 162     /* Atari DMC File */
 163     [AFMT_DMC] =
 164         AFMT_ENTRY("DMC",   "asap", NULL,       get_other_asap_metadata,"dmc\0"),
 165     /* Atari DLT File */
 166     [AFMT_DLT] =
 167         AFMT_ENTRY("DLT",   "asap", NULL,       get_other_asap_metadata,"dlt\0"),
 168     /* Atari MPT File */
 169     [AFMT_MPT] =
 170         AFMT_ENTRY("MPT",   "asap", NULL,       get_other_asap_metadata,"mpt\0"),
 171     /* Atari MPD File */
 172     [AFMT_MPD] =
 173         AFMT_ENTRY("MPD",   "asap", NULL,       get_other_asap_metadata,"mpd\0"),
 174     /* Atari RMT File */
 175     [AFMT_RMT] =
 176         AFMT_ENTRY("RMT",   "asap", NULL,       get_other_asap_metadata,"rmt\0"),
 177     /* Atari TMC File */
 178     [AFMT_TMC] =
 179         AFMT_ENTRY("TMC",   "asap", NULL,       get_other_asap_metadata,"tmc\0"),
 180     /* Atari TM8 File */
 181     [AFMT_TM8] =
 182         AFMT_ENTRY("TM8",   "asap", NULL,       get_other_asap_metadata,"tm8\0"),
 183     /* Atari TM2 File */
 184     [AFMT_TM2] =
 185         AFMT_ENTRY("TM2",   "asap", NULL,       get_other_asap_metadata,"tm2\0"),
 186     /* Atrac3 in Sony OMA Container */
 187     [AFMT_OMA_ATRAC3] =
 188         AFMT_ENTRY("ATRAC3","atrac3_oma",NULL,  get_oma_metadata,   "oma\0aa3\0"),
 189     /* SMAF (Synthetic music Mobile Application Format) */
 190     [AFMT_SMAF] =
 191         AFMT_ENTRY("SMAF",  "smaf", NULL,       get_smaf_metadata,  "mmf\0"),
 192     /* Sun Audio file */
 193     [AFMT_AU] =
 194         AFMT_ENTRY("AU",    "au",   NULL,       get_au_metadata,    "au\0snd\0"),
 195     /* VOX (Dialogic telephony file formats) */
 196     [AFMT_VOX] =
 197         AFMT_ENTRY("VOX",   "vox",  NULL,       get_vox_metadata,   "vox\0"),
 198     /* Wave64 */
 199     [AFMT_WAVE64] =
 200         AFMT_ENTRY("WAVE64","wav64",NULL,       get_wave64_metadata,"w64\0"),
 201     /* True Audio */
 202     [AFMT_TTA] =
 203         AFMT_ENTRY("TTA",   "tta",  NULL,       get_tta_metadata,   "tta\0"),
 204     /* WMA Voice in ASF */
 205     [AFMT_WMAVOICE] =
 206         AFMT_ENTRY("WMAVoice","wmavoice",NULL,  NULL,               "wma\0wmv\0"),
 207     /* Musepack SV8 */
 208     [AFMT_MPC_SV8] =
 209         AFMT_ENTRY("MPCv8", "mpc",  NULL,       get_musepack_metadata,"mpc\0"),
 210     /* Advanced Audio Coding High Efficiency in M4A container */
 211     [AFMT_MP4_AAC_HE] =
 212         AFMT_ENTRY("AAC-HE","aac",  NULL,       get_mp4_metadata,   "mp4\0"),
 213 #endif
 214 };
 215
 216 #if CONFIG_CODEC == SWCODEC && defined (HAVE_RECORDING)
 217 /* get REC_FORMAT_* corresponding AFMT_* */
 218 const int rec_format_afmt[REC_NUM_FORMATS] =
 219 {
 220     /* give AFMT_UNKNOWN by default */
 221     [0 ... REC_NUM_FORMATS-1] = AFMT_UNKNOWN,
 222     /* add new entries below this line */
 223     [REC_FORMAT_AIFF]    = AFMT_AIFF,
 224     [REC_FORMAT_MPA_L3]  = AFMT_MPA_L3,
 225     [REC_FORMAT_WAVPACK] = AFMT_WAVPACK,
 226     [REC_FORMAT_PCM_WAV] = AFMT_PCM_WAV,
 227 };
 228
 229 /* get AFMT_* corresponding REC_FORMAT_* */
 230 const int afmt_rec_format[AFMT_NUM_CODECS] =
 231 {
 232     /* give -1 by default */
 233     [0 ... AFMT_NUM_CODECS-1] = -1,
 234     /* add new entries below this line */
 235     [AFMT_AIFF]    = REC_FORMAT_AIFF,
 236     [AFMT_MPA_L3]  = REC_FORMAT_MPA_L3,
 237     [AFMT_WAVPACK] = REC_FORMAT_WAVPACK,
 238     [AFMT_PCM_WAV] = REC_FORMAT_PCM_WAV,
 239 };
 240 #endif /* CONFIG_CODEC == SWCODEC && defined (HAVE_RECORDING) */
 241
 242 #if CONFIG_CODEC == SWCODEC
 243 /* Get the canonical AFMT type */
 244 int get_audio_base_codec_type(int type)
 245 {
 246     int base_type = type;
 247     switch (type) {
 248         case AFMT_MPA_L1:
 249         case AFMT_MPA_L2:
 250         case AFMT_MPA_L3:
 251             base_type = AFMT_MPA_L3;
 252             break;
 253         case AFMT_MPC_SV7:
 254         case AFMT_MPC_SV8:
 255             base_type = AFMT_MPC_SV7;
 256             break;
 257         case AFMT_MP4_AAC:
 258         case AFMT_MP4_AAC_HE:
 259             base_type = AFMT_MP4_AAC;
 260             break;
 261         case AFMT_SAP:
 262         case AFMT_CMC:
 263         case AFMT_CM3:
 264         case AFMT_CMR:
 265         case AFMT_CMS:
 266         case AFMT_DMC:
 267         case AFMT_DLT:
 268         case AFMT_MPT:
 269         case AFMT_MPD:
 270         case AFMT_RMT:
 271         case AFMT_TMC:
 272         case AFMT_TM8:
 273         case AFMT_TM2:
 274             base_type = AFMT_SAP;
 275             break;
 276         default:
 277             break;
 278     }
 279
 280     return base_type;
 281 }
 282
 283 /* Get the basic audio type */
 284 enum data_type get_audio_base_data_type(int afmt)
 285 {
 286     if ((unsigned)afmt >= AFMT_NUM_CODECS)
 287         return TYPE_UNKNOWN;
 288
 289     switch (get_audio_base_codec_type(afmt))
 290     {
 291     case AFMT_NSF:
 292     case AFMT_SPC:
 293     case AFMT_SID:
 294     case AFMT_MOD:
 295     case AFMT_SAP:
 296         /* Type must be allocated and loaded in its entirety onto
 297            the buffer */
 298         return TYPE_ATOMIC_AUDIO;
 299
 300     default:
 301         /* Assume type may be loaded and discarded incrementally */
 302         return TYPE_PACKET_AUDIO;
 303
 304     case AFMT_UNKNOWN:
 305         /* Have no idea at all */
 306         return TYPE_UNKNOWN;
 307     }
 308 }
 309
 310 /* Is the format allowed to buffer starting at some offset other than 0
 311    or first frame only for resume purposes? */
 312 bool format_buffers_with_offset(int afmt)
 313 {
 314     switch (afmt)
 315     {
 316     case AFMT_MPA_L1:
 317     case AFMT_MPA_L2:
 318     case AFMT_MPA_L3:
 319     case AFMT_WAVPACK:
 320         /* Format may be loaded at the first needed frame */
 321         return true;
 322     default:
 323         /* Format must be loaded from the beginning of the file
 324            (does not imply 'atomic', while 'atomic' implies 'no offset') */
 325         return false;
 326     }
 327 }
 328 #endif /* CONFIG_CODEC == SWCODEC */
 329
 330
 331 /* Simple file type probing by looking at the filename extension. */
 332 unsigned int probe_file_format(const char *filename)
 333 {
 334     char *suffix;
 335     unsigned int i;
 336
 337     suffix = strrchr(filename, '.');
 338
 339     if (suffix == NULL)
 340     {
 341         return AFMT_UNKNOWN;
 342     }
 343
 344     /* skip '.' */
 345     suffix++;
 346
 347     for (i = 1; i < AFMT_NUM_CODECS; i++)
 348     {
 349         /* search extension list for type */
 350         const char *ext = audio_formats[i].ext_list;
 351
 352         do
 353         {
 354             if (strcasecmp(suffix, ext) == 0)
 355             {
 356                 return i;
 357             }
 358
 359             ext += strlen(ext) + 1;
 360         }
 361         while (*ext != '\0');
 362     }
 363
 364     return AFMT_UNKNOWN;
 365 }
 366
 367 /* Note, that this returns false for successful, true for error! */
 368 bool mp3info(struct mp3entry *entry, const char *filename)
 369 {
 370     int fd;
 371     bool result;
 372
 373     fd = open(filename, O_RDONLY);
 374     if (fd < 0)
 375         return true;
 376
 377     result = !get_metadata(entry, fd, filename);
 378
 379     close(fd);
 380
 381     return result;
 382 }
 383
 384 /* Get metadata for track - return false if parsing showed problems with the
 385  * file that would prevent playback.
 386  */
 387 bool get_metadata(struct mp3entry* id3, int fd, const char* trackname)
 388 {
 389     const struct afmt_entry *entry;
 390     int logfd = 0;
 391     DEBUGF("Read metadata for %s\n", trackname);
 392     if (write_metadata_log)
 393     {
 394         logfd = open("/metadata.log", O_WRONLY | O_APPEND | O_CREAT, 0666);
 395         if (logfd >= 0)
 396         {
 397             write(logfd, trackname, strlen(trackname));
 398             write(logfd, "\n", 1);
 399             close(logfd);
 400         }
 401     }
 402
 403     /* Clear the mp3entry to avoid having bogus pointers appear */
 404     wipe_mp3entry(id3);
 405
 406     /* Take our best guess at the codec type based on file extension */
 407     id3->codectype = probe_file_format(trackname);
 408
 409     entry = &audio_formats[id3->codectype];
 410
 411     /* Load codec specific track tag information and confirm the codec type. */
 412     if (!entry->parse_func)
 413     {
 414         DEBUGF("nothing to parse for %s (format %s)", trackname, entry->label);
 415         return false;
 416     }
 417
 418     if (!entry->parse_func(fd, id3))
 419     {
 420         DEBUGF("parsing %s failed (format: %s)", trackname, entry->label);
 421         return false;
 422     }
 423
 424     lseek(fd, 0, SEEK_SET);
 425     strlcpy(id3->path, trackname, sizeof(id3->path));
 426     /* We have successfully read the metadata from the file */
 427     return true;
 428 }
 429
 430 #ifndef __PCTOOL__
 431 #if CONFIG_CODEC == SWCODEC
 432 void strip_tags(int handle_id)
 433 {
 434     static const unsigned char tag[] = "TAG";
 435     static const unsigned char apetag[] = "APETAGEX";
 436     size_t len, version;
 437     void *tail;
 438
 439     if (bufgettail(handle_id, 128, &tail) != 128)
 440         return;
 441
 442     if (memcmp(tail, tag, 3) == 0)
 443     {
 444         /* Skip id3v1 tag */
 445         logf("Cutting off ID3v1 tag");
 446         bufcuttail(handle_id, 128);
 447     }
 448
 449     /* Get a new tail, as the old one may have been cut */
 450     if (bufgettail(handle_id, 32, &tail) != 32)
 451         return;
 452
 453     /* Check for APE tag (look for the APE tag footer) */
 454     if (memcmp(tail, apetag, 8) != 0)
 455         return;
 456
 457     /* Read the version and length from the footer */
 458     version = get_long_le(&((unsigned char *)tail)[8]);
 459     len = get_long_le(&((unsigned char *)tail)[12]);
 460     if (version == 2000)
 461         len += 32; /* APEv2 has a 32 byte header */
 462
 463     /* Skip APE tag */
 464     logf("Cutting off APE tag (%ldB)", len);
 465     bufcuttail(handle_id, len);
 466 }
 467 #endif /* CONFIG_CODEC == SWCODEC */
 468 #endif /* ! __PCTOOL__ */
 469
 470 #define MOVE_ENTRY(x) if (x) x += offset;
 471
 472 void adjust_mp3entry(struct mp3entry *entry, void *dest, const void *orig)
 473 {
 474     long offset;
 475     if (orig > dest)
 476         offset = -((size_t)orig - (size_t)dest);
 477     else
 478         offset =  ((size_t)dest - (size_t)orig);
 479
 480     MOVE_ENTRY(entry->title)
 481     MOVE_ENTRY(entry->artist)
 482     MOVE_ENTRY(entry->album)
 483
 484     if (entry->genre_string > (char*)orig &&
 485         entry->genre_string < (char*)orig + sizeof(struct mp3entry))
 486         /* Don't adjust that if it points to an entry of the "genres" array */
 487         entry->genre_string += offset;
 488
 489     MOVE_ENTRY(entry->track_string)
 490     MOVE_ENTRY(entry->disc_string)
 491     MOVE_ENTRY(entry->year_string)
 492     MOVE_ENTRY(entry->composer)
 493     MOVE_ENTRY(entry->comment)
 494     MOVE_ENTRY(entry->albumartist)
 495     MOVE_ENTRY(entry->grouping)
 496     MOVE_ENTRY(entry->mb_track_id)
 497 }
 498
 499 void copy_mp3entry(struct mp3entry *dest, const struct mp3entry *orig)
 500 {
 501     memcpy(dest, orig, sizeof(struct mp3entry));
 502     adjust_mp3entry(dest, dest, orig);
 503 }
 504
 505 /* A shortcut to simplify the common task of clearing the struct */
 506 void wipe_mp3entry(struct mp3entry *id3)
 507 {
 508     memset(id3, 0, sizeof (struct mp3entry));
 509 }
 510
 511 #if CONFIG_CODEC == SWCODEC
 512 /* Glean what is possible from the filename alone - does not parse metadata */
 513 void fill_metadata_from_path(struct mp3entry *id3, const char *trackname)
 514 {
 515     char *p;
 516
 517     /* Clear the mp3entry to avoid having bogus pointers appear */
 518     wipe_mp3entry(id3);
 519
 520     /* Find the filename portion of the path */
 521     p = strrchr(trackname, '/');
 522     strlcpy(id3->id3v2buf, p ? ++p : id3->path, ID3V2_BUF_SIZE);
 523
 524     /* Get the format from the extension and trim it off */
 525     p = strrchr(id3->id3v2buf, '.');
 526     if (p)
 527     {
 528         /* Might be wrong for container formats - should we bother? */
 529         id3->codectype = probe_file_format(p);
 530
 531         if (id3->codectype != AFMT_UNKNOWN)
 532             *p = '\0';
 533     }
 534
 535     /* Set the filename as the title */
 536     id3->title = id3->id3v2buf;
 537
 538     /* Copy the path info */
 539     strlcpy(id3->path, trackname, sizeof (id3->path));
 540 }
 541 #endif /* CONFIG_CODEC == SWCODEC */
 542
 543 #ifndef __PCTOOL__
 544 #ifdef HAVE_TAGCACHE
 545 #if CONFIG_CODEC == SWCODEC
 546
 547 enum { AUTORESUMABLE_UNKNOWN = 0, AUTORESUMABLE_TRUE, AUTORESUMABLE_FALSE };
 548
 549 bool autoresumable(struct mp3entry *id3)
 550 {
 551     char *endp, *path;
 552     size_t len;
 553     bool is_resumable;
 554
 555     if (id3->autoresumable)             /* result cached? */
 556         return id3->autoresumable == AUTORESUMABLE_TRUE;
 557
 558     is_resumable = false;
 559
 560     if (id3->path)
 561     {
 562         for (path = global_settings.autoresume_paths;
 563              *path;                     /* search terms left? */
 564              path++)
 565         {
 566             if (*path == ':')           /* Skip empty search patterns */
 567                 continue;
 568
 569             /* FIXME: As soon as strcspn or strchrnul are made available in
 570                the core, the following can be made more efficient. */
 571             endp = strchr(path, ':');
 572             if (endp)
 573                 len = endp - path;
 574             else
 575                 len = strlen(path);
 576
 577             /* Note: At this point, len is always > 0 */
 578
 579             if (strncasecmp(id3->path, path, len) == 0)
 580             {
 581                 /* Full directory-name matches only.  Trailing '/' in
 582                    search path OK. */
 583                 if (id3->path[len] == '/' || id3->path[len - 1] == '/')
 584                 {
 585                     is_resumable = true;
 586                     break;
 587                 }
 588             }
 589             path += len - 1;
 590         }
 591     }
 592
 593     /* cache result */
 594     id3->autoresumable =
 595         is_resumable ? AUTORESUMABLE_TRUE : AUTORESUMABLE_FALSE;
 596
 597     logf("autoresumable: %s is%s resumable",
 598          id3->path, is_resumable ? "" : " not");
 599
 600     return is_resumable;
 601 }
 602
 603 #endif  /* SWCODEC */
 604 #endif  /* HAVE_TAGCACHE */
 605 #endif  /* __PCTOOL__ */