pqc/external/flint-2.4.3/fmpq/test/t-get_cfrac.c

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2014-05-18 22:03:37 +00:00
/*=============================================================================
This file is part of FLINT.
FLINT 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 2 of the License, or
(at your option) any later version.
FLINT 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 FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2011 Fredrik Johansson
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "fmpz.h"
#include "fmpq.h"
#include "fmpz_vec.h"
#include "ulong_extras.h"
int
main(void)
{
int i;
FLINT_TEST_INIT(state);
flint_printf("get_cfrac....");
fflush(stdout);
for (i = 0; i < 10000; i++)
{
fmpq_t x, r;
fmpz *c1, *c2;
slong n1, n2, bound;
fmpq_init(x);
fmpq_init(r);
fmpq_randtest(x, state, 1 + n_randint(state, 1000));
bound = fmpq_cfrac_bound(x);
c1 = _fmpz_vec_init(bound);
c2 = _fmpz_vec_init(bound);
n1 = fmpq_get_cfrac(c1, r, x, bound);
if (!fmpq_is_zero(r))
{
flint_printf("FAIL: expected zero remainder\n");
abort();
}
/* Test chaining */
n2 = 0;
while (1)
{
n2 += fmpq_get_cfrac(c2 + n2, x, x, n_randint(state, 10));
if (fmpq_is_zero(x))
break;
fmpq_inv(x, x);
}
if (n1 != n2)
{
flint_printf("FAIL: n1 = %wd, n2 = %wd\n", n1, n2);
abort();
}
if (!_fmpz_vec_equal(c1, c2, n1))
{
flint_printf("FAIL: vectors not equal\n");
_fmpz_vec_print(c1, n1); flint_printf("\n");
_fmpz_vec_print(c2, n2); flint_printf("\n");
abort();
}
_fmpz_vec_clear(c1, bound);
_fmpz_vec_clear(c2, bound);
fmpq_clear(x);
fmpq_clear(r);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}