BASE32(HEX) reverse tabels.

#if 0
  LEGEND:
0..127     VALID NUMBER.

-1         INVALID

-2         IGNORE

-3         PADDING MARK
#endif

UNUSED
static const t_int8
BASE_32_REVERSE[128] = {
/* 0   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F     */
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -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, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /*2*/
  -1, -1, 27, 28, 29, 30, 31, 32, -1, -1, -1, -1, -1, -3, -1, -1, /*3*/
  -1,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, /*4*/
  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, -1, -1, -1, -1, -1, /*5*/
  -1,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, /*6*/
  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, -1, -1, -1, -1, -1, /*7*/
};

UNUSED
static const t_int8
BASE_32_HEX_REVERSE[128] = {
/* 0   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F     */
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -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*/
  -2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /*2*/
   0,  1,  2,  3,  4,  5,  6,  7,  8,  9, -1, -1, -1, -1, -1, -1, /*3*/
  -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, /*4*/
  25, 26, 27, 28, 29, 30, 31, 31, -1, -1, -1, -1, -1, -1, -1, -1, /*5*/
  -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, /*7*/
  25, 26, 27, 28, 29, 30, 31, 31, -1, -1, -1, -1, -1, -1, -1, -1, /*8*/
};