main.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>

uint64_t compute_hash(const uint8_t *in, uint32_t len);

static uint16_t lfsr = 0xACE1u;
static uint32_t bit;
static uint32_t myrand()
{
  bit  = ((lfsr >> 0) ^ (lfsr >> 2) ^ (lfsr >> 3) ^ (lfsr >> 5) ) & 1;
  return lfsr =  (lfsr >> 1) | (bit << 15);
}

int main(int argc, char **argv)
{
  unsigned seed = 0x12345678;
  srand(seed);
  int iterations = 1;

  if (argc > 1)
    seed = strtol(argv[1], 0, 0);
  if (argc > 2)
    iterations = strtol(argv[2], 0, 0);

  for (int i = 0; i<iterations; i++)
  {
    int len = rand() % 4096;
    uint8_t *p = malloc(len);
    for (int j=0; j<len; j++)
      ((unsigned char *)p)[j] = myrand() >> 8;

    uint64_t hash = compute_hash(p, len);
    printf("%08x%08x\n", (uint32_t)(hash>>32), (uint32_t)(hash>>0));
    free(p);
  }
  
  return 0; 
}