frametype.c

arm9开发板上的例子,可以学习一下有简单的c程序

# define PRESERVE  0
# define DISCARD   ID3_FRAME_FLAG_FILEALTERPRESERVATION
# define OBSOLETE  (DISCARD | ID3_FRAME_FLAG_TAGALTERPRESERVATION)

# define FRAMETYPE(type, id, flags, desc)  \
  struct id3_frametype const id3_frametype_##type = {  \
    0, FRAME(id), flags, desc  \
  }

/* static frame types */

FRAMETYPE(text,         text,    PRESERVE, "Unknown text information frame");
FRAMETYPE(url,          url,     PRESERVE, "Unknown URL link frame");
FRAMETYPE(experimental, unknown, PRESERVE, "Experimental frame");
FRAMETYPE(unknown,      unknown, PRESERVE, "Unknown frame");
FRAMETYPE(obsolete,     unknown, OBSOLETE, "Obsolete frame");

#define TOTAL_KEYWORDS 84
#define MIN_WORD_LENGTH 4
#define MAX_WORD_LENGTH 4
#define MIN_HASH_VALUE 7
#define MAX_HASH_VALUE 155
/* maximum key range = 149, duplicates = 0 */

#ifdef __GNUC__
__inline
#else
#ifdef __cplusplus
inline
#endif
#endif
static unsigned int
hash (str, len)
     register const char *str;
     register unsigned int len;
{
  static const unsigned char asso_values[] =
    {
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
       43,   4,  47,  49, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156,  31,  53,   3,  15,   3,
       24,  25,  10,  52,  69,  34,  23,  30,   1,   5,
       10,  62,  20,   0,  28,  28,  22,  19,  47,   3,
       10, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156, 156, 156, 156,
      156, 156, 156, 156, 156, 156, 156
    };
  return asso_values[(unsigned char)str[3]+1] + asso_values[(unsigned char)str[2]] + asso_values[(unsigned char)str[1]] + asso_values[(unsigned char)str[0]];
}

#ifdef __GNUC__
__inline
#endif
const struct id3_frametype *
id3_frametype_lookup (str, len)
     register const char *str;
     register unsigned int len;
{
  static const struct id3_frametype wordlist[] =
    {
#line 282 "frametype.gperf"
      {"ENCR", FRAME(ENCR), PRESERVE, "Encryption method registration"},
#line 292 "frametype.gperf"
      {"POPM", FRAME(POPM), PRESERVE, "Popularimeter"},
#line 351 "frametype.gperf"
      {"WCOM", FRAME(url),  PRESERVE, "Commercial information"},
#line 298 "frametype.gperf"
      {"SEEK", FRAME(SEEK), DISCARD,  "Seek frame"},
#line 349 "frametype.gperf"
      {"USER", FRAME(USER), PRESERVE, "Terms of use"},
#line 285 "frametype.gperf"
      {"GEOB", FRAME(GEOB), PRESERVE, "General encapsulated object"},
#line 304 "frametype.gperf"
      {"TCOM", FRAME(text), PRESERVE, "Composer"},
#line 281 "frametype.gperf"
      {"COMR", FRAME(COMR), PRESERVE, "Commercial frame"},
#line 280 "frametype.gperf"
      {"COMM", FRAME(COMM), PRESERVE, "Comments"},
#line 305 "frametype.gperf"
      {"TCON", FRAME(text), PRESERVE, "Content type"},
#line 291 "frametype.gperf"
      {"PCNT", FRAME(PCNT), PRESERVE, "Play counter"},
#line 293 "frametype.gperf"
      {"POSS", FRAME(POSS), DISCARD,  "Position synchronisation frame"},
#line 284 "frametype.gperf"
      {"ETCO", FRAME(ETCO), DISCARD,  "Event timing codes"},
#line 332 "frametype.gperf"
      {"TPE2", FRAME(text), PRESERVE, "Band/orchestra/accompaniment"},
#line 301 "frametype.gperf"
      {"SYTC", FRAME(SYTC), DISCARD,  "Synchronised tempo codes"},
#line 313 "frametype.gperf"
      {"TENC", FRAME(text), DISCARD,  "Encoded by"},
#line 309 "frametype.gperf"
      {"TDOR", FRAME(text), PRESERVE, "Original release time"},
#line 290 "frametype.gperf"
      {"OWNE", FRAME(OWNE), PRESERVE, "Ownership frame"},
#line 277 "frametype.gperf"
      {"AENC", FRAME(AENC), DISCARD,  "Audio encryption"},
#line 307 "frametype.gperf"
      {"TDEN", FRAME(text), PRESERVE, "Encoding time"},
#line 345 "frametype.gperf"
      {"TSSE", FRAME(text), PRESERVE, "Software/hardware and settings used for encoding"},
#line 339 "frametype.gperf"
      {"TRSN", FRAME(text), PRESERVE, "Internet radio station name"},
#line 300 "frametype.gperf"
      {"SYLT", FRAME(SYLT), DISCARD,  "Synchronised lyric/text"},
#line 354 "frametype.gperf"
      {"WOAR", FRAME(url),  PRESERVE, "Official artist/performer webpage"},
#line 346 "frametype.gperf"
      {"TSST", FRAME(text), PRESERVE, "Set subtitle"},
#line 330 "frametype.gperf"
      {"TOWN", FRAME(text), PRESERVE, "File owner/licensee"},
#line 340 "frametype.gperf"
      {"TRSO", FRAME(text), PRESERVE, "Internet radio station owner"},
#line 322 "frametype.gperf"
      {"TLEN", FRAME(text), DISCARD,  "Length"},
#line 358 "frametype.gperf"
      {"WPUB", FRAME(url),  PRESERVE, "Publishers official webpage"},
#line 343 "frametype.gperf"
      {"TSOT", FRAME(text), PRESERVE, "Title sort order"},
#line 327 "frametype.gperf"
      {"TOFN", FRAME(text), PRESERVE, "Original filename"},
#line 344 "frametype.gperf"
      {"TSRC", FRAME(text), PRESERVE, "ISRC (international standard recording code)"},
#line 324 "frametype.gperf"
      {"TMED", FRAME(text), PRESERVE, "Media type"},
#line 297 "frametype.gperf"
      {"RVRB", FRAME(RVRB), PRESERVE, "Reverb"},
#line 328 "frametype.gperf"
      {"TOLY", FRAME(text), PRESERVE, "Original lyricist(s)/text writer(s)"},
#line 329 "frametype.gperf"
      {"TOPE", FRAME(text), PRESERVE, "Original artist(s)/performer(s)"},
#line 336 "frametype.gperf"
      {"TPRO", FRAME(text), PRESERVE, "Produced notice"},
#line 337 "frametype.gperf"
      {"TPUB", FRAME(text), PRESERVE, "Publisher"},
#line 357 "frametype.gperf"
      {"WPAY", FRAME(url),  PRESERVE, "Payment"},
#line 335 "frametype.gperf"
      {"TPOS", FRAME(text), PRESERVE, "Part of a set"},
#line 356 "frametype.gperf"
      {"WORS", FRAME(url),  PRESERVE, "Official Internet radio station homepage"},
#line 325 "frametype.gperf"
      {"TMOO", FRAME(text), PRESERVE, "Mood"},
#line 338 "frametype.gperf"
      {"TRCK", FRAME(text), PRESERVE, "Track number/position in set"},
#line 320 "frametype.gperf"
      {"TKEY", FRAME(text), PRESERVE, "Initial key"},
#line 308 "frametype.gperf"
      {"TDLY", FRAME(text), PRESERVE, "Playlist delay"},
#line 296 "frametype.gperf"
      {"RVA2", FRAME(RVA2), DISCARD,  "Relative volume adjustment (2)"},
#line 310 "frametype.gperf"
      {"TDRC", FRAME(text), PRESERVE, "Recording time"},
#line 350 "frametype.gperf"
      {"USLT", FRAME(USLT), PRESERVE, "Unsynchronised lyric/text transcription"},
#line 353 "frametype.gperf"
      {"WOAF", FRAME(url),  PRESERVE, "Official audio file webpage"},
#line 312 "frametype.gperf"
      {"TDTG", FRAME(text), PRESERVE, "Tagging time"},
#line 299 "frametype.gperf"
      {"SIGN", FRAME(SIGN), PRESERVE, "Signature frame"},
#line 355 "frametype.gperf"
      {"WOAS", FRAME(url),  PRESERVE, "Official audio source webpage"},
#line 331 "frametype.gperf"
      {"TPE1", FRAME(text), PRESERVE, "Lead performer(s)/soloist(s)"},
#line 302 "frametype.gperf"
      {"TALB", FRAME(text), PRESERVE, "Album/movie/show title"},
#line 341 "frametype.gperf"
      {"TSOA", FRAME(text), PRESERVE, "Album sort order"},
#line 321 "frametype.gperf"
      {"TLAN", FRAME(text), PRESERVE, "Language(s)"},
#line 333 "frametype.gperf"
      {"TPE3", FRAME(text), PRESERVE, "Conductor/performer refinement"},
#line 352 "frametype.gperf"
      {"WCOP", FRAME(url),  PRESERVE, "Copyright/legal information"},
#line 334 "frametype.gperf"
      {"TPE4", FRAME(text), PRESERVE, "Interpreted, remixed, or otherwise modified by"},
#line 323 "frametype.gperf"
      {"TMCL", FRAME(text), PRESERVE, "Musician credits list"},
#line 303 "frametype.gperf"
      {"TBPM", FRAME(text), PRESERVE, "BPM (beats per minute)"},
#line 311 "frametype.gperf"
      {"TDRL", FRAME(text), PRESERVE, "Release time"},
#line 326 "frametype.gperf"
      {"TOAL", FRAME(text), PRESERVE, "Original album/movie/show title"},
#line 342 "frametype.gperf"
      {"TSOP", FRAME(text), PRESERVE, "Performer sort order"},
#line 363 "frametype.gperf"
      {"ZOBS", FRAME(ZOBS), OBSOLETE, "Obsolete frame"},
#line 283 "frametype.gperf"
      {"EQU2", FRAME(EQU2), DISCARD,  "Equalisation (2)"},
#line 306 "frametype.gperf"
      {"TCOP", FRAME(text), PRESERVE, "Copyright message"},
#line 287 "frametype.gperf"
      {"LINK", FRAME(LINK), PRESERVE, "Linked information"},
#line 286 "frametype.gperf"
      {"GRID", FRAME(GRID), PRESERVE, "Group identification registration"},
#line 294 "frametype.gperf"
      {"PRIV", FRAME(PRIV), PRESERVE, "Private frame"},
#line 315 "frametype.gperf"
      {"TFLT", FRAME(text), PRESERVE, "File type"},
#line 289 "frametype.gperf"
      {"MLLT", FRAME(MLLT), DISCARD,  "MPEG location lookup table"},
#line 314 "frametype.gperf"
      {"TEXT", FRAME(text), PRESERVE, "Lyricist/text writer"},
#line 348 "frametype.gperf"
      {"UFID", FRAME(UFID), PRESERVE, "Unique file identifier"},
#line 278 "frametype.gperf"
      {"APIC", FRAME(APIC), PRESERVE, "Attached picture"},
#line 279 "frametype.gperf"
      {"ASPI", FRAME(ASPI), DISCARD,  "Audio seek point index"},
#line 318 "frametype.gperf"
      {"TIT2", FRAME(text), PRESERVE, "Title/songname/content description"},
#line 359 "frametype.gperf"
      {"WXXX", FRAME(WXXX), PRESERVE, "User defined URL link frame"},
#line 288 "frametype.gperf"
      {"MCDI", FRAME(MCDI), PRESERVE, "Music CD identifier"},
#line 316 "frametype.gperf"
      {"TIPL", FRAME(text), PRESERVE, "Involved people list"},
#line 347 "frametype.gperf"
      {"TXXX", FRAME(TXXX), PRESERVE, "User defined text information frame"},
#line 295 "frametype.gperf"
      {"RBUF", FRAME(RBUF), PRESERVE, "Recommended buffer size"},
#line 317 "frametype.gperf"
      {"TIT1", FRAME(text), PRESERVE, "Content group description"},
#line 319 "frametype.gperf"
      {"TIT3", FRAME(text), PRESERVE, "Subtitle/description refinement"}
    };

  static const short lookup[] =
    {
      -1, -1, -1, -1, -1, -1, -1,  0, -1, -1, -1, -1, -1, -1,
      -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,  1, -1,
       2,  3, -1,  4, -1, -1, -1, -1,  5,  6,  7,  8, -1,  9,
      10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
      24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37,
      38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,
      52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65,
      66, 67, 68, 69, -1, 70, 71, -1, 72, 73, 74, -1, 75, -1,
      76, -1, -1, -1, 77, 78, -1, -1, 79, -1, -1, -1, -1, 80,
      81, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
      -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 82, -1, -1,
      -1, 83
    };

  if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
    {
      register int key = hash (str, len);

      if (key <= MAX_HASH_VALUE && key >= 0)
        {
          register int index = lookup[key];

          if (index >= 0)
            {
              register const char *s = wordlist[index].id;

              if (*str == *s && !strncmp (str + 1, s + 1, len - 1) && s[len] == '\0')
                return &wordlist[index];
            }
        }
    }
  return 0;
}