Function random_bounded_uint8_fill

numpy/random/src/distributions/distributions.c:1649–1680

* Fills an array with cnt random npy_uint8 between off and off + rng * inclusive. The numbers wrap if rng is sufficiently large. */

 * inclusive. The numbers wrap if rng is sufficiently large.
 */
void random_bounded_uint8_fill(bitgen_t *bitgen_state, uint8_t off, uint8_t rng,
                               npy_intp cnt, bool use_masked, uint8_t *out) {
  npy_intp i;
  uint32_t buf = 0;
  int bcnt = 0;

  if (rng == 0) {
    for (i = 0; i < cnt; i++) {
      out[i] = off;
    }
  } else if (rng == 0xFFUL) {
    /* Lemire8 doesn't support rng = 0xFF. */
    for (i = 0; i < cnt; i++) {
      out[i] = off + buffered_uint8(bitgen_state, &bcnt, &buf);
    }
  } else {
    if (use_masked) {
      /* Smallest bit mask >= max */
      uint8_t mask = (uint8_t)gen_mask(rng);

      for (i = 0; i < cnt; i++) {
        out[i] = off + buffered_bounded_masked_uint8(bitgen_state, rng, mask,
                                                     &bcnt, &buf);
      }
    } else {
      for (i = 0; i < cnt; i++) {
        out[i] =
            off + buffered_bounded_lemire_uint8(bitgen_state, rng, &bcnt, &buf);
      }
    }
  }
}

/*
 * Fills an array with cnt random npy_bool between off and off + rng