Function decodeUpto15Bits

src/simplicity/bitstream.c:146–161

Decode an encoded bitstring up to length 15. * If successful returns the length of the bitstring and 'result' contains the decoded bits. * The decoded bitstring is stored in the LSBs of 'result', with the LSB being the last bit decoded. * Any remaining bits in 'result' are reset to 0. * If the decoded bitstring would be too long 'SIMPLICITY_ERR_DATA_OUT_OF_RANGE' is returned ('result' may be m

 *               NULL != stream
 */
static int32_t decodeUpto15Bits(int32_t* result, bitstream* stream) {
  int32_t bit = read1Bit(stream);
  if (bit < 0) return bit;

  *result = 0;
  if (0 == bit) {
    return 0;
  } else {
    int32_t n = decodeUpto15(stream);
    if (0 <= n) {
      *result = simplicity_readNBits(n, stream);
      if (*result < 0) return *result;
    }
    return n;
  }
}

/* Decode an encoded number between 1 and 65535 inclusive.
 * When successful returns the decoded result.