xorshiftrandom.c

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/*******************************************************************************
 * Copyright (c) 2017, Rockwell Automation, Inc.
 * All rights reserved.
 *
 ******************************************************************************/

#include "xorshiftrandom.h"

static uint32_t xor_shift_seed; 
void SetXorShiftSeed(uint32_t seed) {
  xor_shift_seed = seed;
}

void CalculateNextSeed(void) {
  xor_shift_seed ^= xor_shift_seed << 13;
  xor_shift_seed ^= xor_shift_seed >> 17;
  xor_shift_seed ^= xor_shift_seed << 5;
}

uint32_t NextXorShiftUint32(void) {
  CalculateNextSeed();
  return xor_shift_seed;
}