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/*
Copyright (C) 2013 Mike Hansen
Copyright (C) 2024 Albin Ahlbäck
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "test_helpers.h"
#include "ulong_extras.h"
TEST_FUNCTION_START(n_discrete_log_bsgs, state)
{
int i;
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
ulong p, root, b, d, result;
double pinv;
p = n_randprime(state, 2 + n_randint(state, 26), 1);
pinv = n_precompute_inverse(p);
root = n_primitive_root_prime(p);
b = n_randint(state, p - 1) + 1;
d = n_discrete_log_bsgs(b, root, p);
result = n_powmod_precomp(root, d, p, pinv);
if (result != b)
TEST_FUNCTION_FAIL("%wu ** (%wu) == %wu != %wu\n", root, d, result, b);
}
TEST_FUNCTION_END(state);
}