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/*
Copyright (C) 2020 Daniel Schultz
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"
#include "fmpz.h"
TEST_FUNCTION_START(n_CRT, state)
{
slong i, j;
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
fmpz_t m1, m2, m1m2, a1, a2, r;
flint_bitcnt_t b1 = n_randint(state, FLINT_BITS) + 1;
flint_bitcnt_t b2 = n_randint(state, FLINT_BITS + 1 - b1) + 1;
fmpz_init(m1);
fmpz_init(m2);
fmpz_init(m1m2);
fmpz_init(a1);
fmpz_init(a2);
fmpz_init(r);
fmpz_randtest_not_zero(m1, state, b1);
fmpz_randtest_not_zero(m2, state, b2);
fmpz_abs(m1, m1);
fmpz_abs(m2, m2);
fmpz_mul(m1m2, m1, m2);
fmpz_gcd(r, m1, m2);
if (fmpz_is_one(r) &&
fmpz_abs_fits_ui(m1) &&
fmpz_abs_fits_ui(m2) &&
fmpz_abs_fits_ui(m1m2))
{
for (j = 0; j < 50; j++)
{
fmpz_randm(a1, state, m1);
fmpz_randm(a2, state, m2);
fmpz_CRT(r, a1, m1, a2, m2, 0);
if (fmpz_get_ui(r) != n_CRT(fmpz_get_ui(a1), fmpz_get_ui(m1),
fmpz_get_ui(a2), fmpz_get_ui(m2)))
TEST_FUNCTION_FAIL(
"a1: %{fmpz}\n"
"m1: %{fmpz}\n"
"a2: %{fmpz}\n"
"m2: %{fmpz}\n",
a1, m1, a2, m2);
}
}
fmpz_clear(m1);
fmpz_clear(m2);
fmpz_clear(m1m2);
fmpz_clear(a1);
fmpz_clear(a2);
fmpz_clear(r);
}
TEST_FUNCTION_END(state);
}