void CLASS parse_ciff(int offset, int length, int depth)
{
  int tboff, nrecs, c, type, len, save, wbi = -1;
  ushort key[] = {0x410, 0x45f3};

  fseek(ifp, offset + length - 4, SEEK_SET);
  tboff = get4() + offset;
  fseek(ifp, tboff, SEEK_SET);
  nrecs = get2();
  if ((nrecs | depth) > 127)
    return;
  while (nrecs--)
  {
    type = get2();
    len = get4();
    save = ftell(ifp) + 4;
    fseek(ifp, offset + get4(), SEEK_SET);
    if ((((type >> 8) + 8) | 8) == 0x38)
    {
      parse_ciff(ftell(ifp), len, depth + 1); /* Parse a sub-table */
    }
#ifdef LIBRAW_LIBRARY_BUILD
    if (type == 0x3004)
      parse_ciff(ftell(ifp), len, depth + 1);
#endif
    if (type == 0x0810)
      fread(artist, 64, 1, ifp);
    if (type == 0x080a)
    {
      fread(make, 64, 1, ifp);
      fseek(ifp, strbuflen(make) - 63, SEEK_CUR);
      fread(model, 64, 1, ifp);
    }
    if (type == 0x1810)
    {
      width = get4();
      height = get4();
      pixel_aspect = int_to_float(get4());
      flip = get4();
    }
    if (type == 0x1835) /* Get the decoder table */
      tiff_compress = get4();
    if (type == 0x2007)
    {
      thumb_offset = ftell(ifp);
      thumb_length = len;
    }
    if (type == 0x1818)
    {
      shutter = powf64(2.0f, -int_to_float((get4(), get4())));
      aperture = powf64(2.0f, int_to_float(get4()) / 2);
#ifdef LIBRAW_LIBRARY_BUILD
      imgdata.lens.makernotes.CurAp = aperture;
#endif
    }
    if (type == 0x102a)
    {
      //      iso_speed = pow (2.0, (get4(),get2())/32.0 - 4) * 50;
      iso_speed = powf64(2.0f, ((get2(), get2()) + get2()) / 32.0f - 5.0f) * 100.0f;
#ifdef LIBRAW_LIBRARY_BUILD
      aperture = _CanonConvertAperture((get2(), get2()));
      imgdata.lens.makernotes.CurAp = aperture;
#else
      aperture = powf64(2.0, (get2(), (short)get2()) / 64.0);
#endif
      shutter = powf64(2.0, -((short)get2()) / 32.0);
      wbi = (get2(), get2());
      if (wbi > 17)
        wbi = 0;
      fseek(ifp, 32, SEEK_CUR);
      if (shutter > 1e6)
        shutter = get2() / 10.0;
    }
    if (type == 0x102c)
    {
      if (get2() > 512)
      { /* Pro90, G1 */
        fseek(ifp, 118, SEEK_CUR);
        FORC4 cam_mul[c ^ 2] = get2();
      }
      else
      { /* G2, S30, S40 */
        fseek(ifp, 98, SEEK_CUR);
        FORC4 cam_mul[c ^ (c >> 1) ^ 1] = get2();
      }
    }
#ifdef LIBRAW_LIBRARY_BUILD
    if (type == 0x10a9)
    {
      INT64 o = ftell(ifp);
      fseek(ifp, (0x5 << 1), SEEK_CUR);
      Canon_WBpresets(0, 0);
      fseek(ifp, o, SEEK_SET);
    }
    if (type == 0x102d)
    {
      INT64 o = ftell(ifp);
      Canon_CameraSettings();
      fseek(ifp, o, SEEK_SET);
    }
    if (type == 0x580b)
    {
      if (strcmp(model, "Canon EOS D30"))
        sprintf(imgdata.shootinginfo.BodySerial, "%d", len);
      else
        sprintf(imgdata.shootinginfo.BodySerial, "%0x-%05d", len >> 16, len & 0xffff);
    }
#endif
    if (type == 0x0032)
    {
      if (len == 768)
      { /* EOS D30 */
        fseek(ifp, 72, SEEK_CUR);
        FORC4 cam_mul[c ^ (c >> 1)] = 1024.0 / get2();
        if (!wbi)
          cam_mul[0] = -1; /* use my auto white balance */
      }
      else if (!cam_mul[0])
      {
        if (get2() == key[0]) /* Pro1, G6, S60, S70 */
          c = (strstr(model, "Pro1") ? "012346000000000000" : "01345:000000006008")[LIM(0, wbi, 17)] - '0' + 2;
        else
        { /* G3, G5, S45, S50 */
          c = "023457000000006000"[LIM(0, wbi, 17)] - '0';
          key[0] = key[1] = 0;
        }
        fseek(ifp, 78 + c * 8, SEEK_CUR);
        FORC4 cam_mul[c ^ (c >> 1) ^ 1] = get2() ^ key[c & 1];
        if (!wbi)
          cam_mul[0] = -1;
      }
    }
    if (type == 0x10a9)
    { /* D60, 10D, 300D, and clones */
      if (len > 66)
        wbi = "0134567028"[LIM(0, wbi, 9)] - '0';
      fseek(ifp, 2 + wbi * 8, SEEK_CUR);
      FORC4 cam_mul[c ^ (c >> 1)] = get2();
    }
    if (type == 0x1030 && wbi >= 0 && (0x18040 >> wbi & 1))
      ciff_block_1030(); /* all that don't have 0x10a9 */
    if (type == 0x1031)
    {
      raw_width = (get2(), get2());
      raw_height = get2();
    }
    if (type == 0x501c)
    {
      iso_speed = len & 0xffff;
    }
    if (type == 0x5029)
    {
#ifdef LIBRAW_LIBRARY_BUILD
      imgdata.lens.makernotes.CurFocal = len >> 16;
      imgdata.lens.makernotes.FocalType = len & 0xffff;
      if (imgdata.lens.makernotes.FocalType == 2)
      {
        imgdata.lens.makernotes.CanonFocalUnits = 32;
        if (imgdata.lens.makernotes.CanonFocalUnits > 1)
          imgdata.lens.makernotes.CurFocal /= (float)imgdata.lens.makernotes.CanonFocalUnits;
      }
      focal_len = imgdata.lens.makernotes.CurFocal;
#else
      focal_len = len >> 16;
      if ((len & 0xffff) == 2)
        focal_len /= 32;
#endif
    }
    if (type == 0x5813)
      flash_used = int_to_float(len);
    if (type == 0x5814)
      canon_ev = int_to_float(len);
    if (type == 0x5817)
      shot_order = len;
    if (type == 0x5834)
    {
      unique_id = len;
#ifdef LIBRAW_LIBRARY_BUILD
      setCanonBodyFeatures(unique_id);
#endif
    }
    if (type == 0x580e)
      timestamp = len;
    if (type == 0x180e)
      timestamp = get4();
#ifdef LOCALTIME
    if ((type | 0x4000) == 0x580e)
      timestamp = mktime(gmtime(&timestamp));
#endif
    fseek(ifp, save, SEEK_SET);
  }
}