55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
/*
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* Reference implementation of Mersenne Twister MT19937 in C++11.
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*
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* Written in 2016 by Joris van Rantwijk <joris@jorisvr.nl>
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*
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* To the extent possible under law, the author(s) have dedicated all copyright
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* and related and neighboring rights to this software to the public domain
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* worldwide. This software is distributed without any warranty.
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*
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* See <http://creativecommons.org/publicdomain/zero/1.0/>
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*/
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#include <cstdlib>
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#include <cstdio>
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#include <random>
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using namespace std;
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int main(int argc, const char **argv)
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{
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if (argc != 3) {
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fprintf(stderr, "Reference implementation of Mersenne Twister MT19937\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "Usage: ref_mt19937 SEED NUMVALUE\n");
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fprintf(stderr, " SEED seed value in range 0 .. (2**31-1)\n");
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fprintf(stderr, " NUMVALUE number of values to get from generator\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "Example: ref_mt19937 0x31415926 100\n");
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exit(1);
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}
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char *p;
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unsigned long seed = strtoul(argv[1], &p, 0);
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if (p == argv[1] || *p != '\0') {
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fprintf(stderr, "ERROR: Invalid value for SEED0\n");
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exit(1);
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}
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unsigned long numval = strtoul(argv[2], &p, 0);
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if (p == argv[3] || *p != '\0') {
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fprintf(stderr, "ERROR: Invalid value for NUMVALUE\n");
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exit(1);
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}
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mt19937 rng(seed);
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for (unsigned long k = 0; k < numval; k++) {
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printf("0x%08lx\n", (unsigned long) rng());
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}
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return 0;
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}
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