/*
* Simple random number generator for testing.
* Copyright © 2022 Nick Bowler
*
* Directly compare the test lib RNG against the reference implementation.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
#include
#include
#include "rng.c"
#include "xos256p.c"
int main(void)
{
unsigned long long seed_state = 0xdeadbeeff00dcafe;
unsigned long long test_result, ref_result;
unsigned long long ref_state[4], test_state[4];
int i, ret = 0;
printf("1..200\n");
for (i = 0; i < 100; i++) {
s[0] = ref_state[0] = test_state[0] = splitmix64(&seed_state);
s[1] = ref_state[1] = test_state[1] = splitmix64(&seed_state);
s[2] = ref_state[2] = test_state[2] = splitmix64(&seed_state);
s[3] = ref_state[3] = test_state[3] = splitmix64(&seed_state);
ref_result = next();
test_result = xoshiro256p(test_state);
if (ref_result != test_result) {
printf("not ok %d rng output\n", 2*i+1);
printf("# Failed, unexpected result\n");
printf("# with initial state %llx %llx %llx %llx\n",
ref_state[0], ref_state[1],
ref_state[2], ref_state[3]);
printf("# received: %llx\n", test_result);
printf("# expected: %llx\n", ref_result);
ret = EXIT_FAILURE;
} else {
printf("ok %d rng output\n", 2*i+1);
}
if (s[0] != test_state[0] || s[1] != test_state[1]
|| s[2] != test_state[2] || s[3] != test_state[3])
{
printf("not ok %d rng state update\n", 2*i+2);
printf("# Failed, state update differed\n");
printf("# with initial state %llx %llx %llx %llx\n",
ref_state[0], ref_state[1],
ref_state[2], ref_state[3]);
printf("# received: %llx %llx %llx %llx\n",
test_state[0], test_state[1],
test_state[2], test_state[3]);
printf("# expected: %llx %llx %llx %llx\n",
(unsigned long long)s[0],
(unsigned long long)s[1],
(unsigned long long)s[2],
(unsigned long long)s[3]);
ret = EXIT_FAILURE;
} else {
printf("ok %d rng state update\n", 2*i+2);
}
}
return ret;
}