Function getWord32Array

src/simplicity/deserialize.c:16–27

Fetches 'len' 'uint32_t's from 'stream' into 'result'. * The bits in each 'uint32_t' are set from the MSB to the LSB and the 'uint32_t's of 'result' are set from 0 up to 'len'. * Returns 'SIMPLICITY_ERR_BITSTREAM_EOF' if not enough bits are available ('result' may be modified). * Returns 'SIMPLICITY_NO_ERROR' if successful. * * Precondition: uint32_t result[len]; * NULL != stre

 *               NULL != stream
 */
static simplicity_err getWord32Array(uint32_t* result, const size_t len, bitstream* stream) {
  for (size_t i = 0; i < len; ++i) {
    /* Due to error codes, readNBits cannot fetch 32 bits at once. Instead we fetch two groups of 16 bits. */
    int32_t bits16 = simplicity_readNBits(16, stream);
    if (bits16 < 0) return (simplicity_err)bits16;
    result[i] = (uint32_t)bits16 << 16;
    bits16 = simplicity_readNBits(16, stream);
    if (bits16 < 0) return (simplicity_err)bits16;
    result[i] |= (uint32_t)bits16;
  }
  return SIMPLICITY_NO_ERROR;
}

/* Fetches a 256-bit hash value from 'stream' into 'result'.
 * Returns 'SIMPLICITY_ERR_BITSTREAM_EOF' if not enough bits are available ('result' may be modified).