pqc/external/flint-2.4.3/fmpq/test/t-inv.c
2014-05-24 23:16:06 +02:00

157 lines
3.7 KiB
C

/*=============================================================================
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"
int
main(void)
{
int i;
FLINT_TEST_INIT(state);
flint_printf("inv....");
fflush(stdout);
/* x = y * z */
for (i = 0; i < 10000; i++)
{
fmpq_t x, y, z;
mpq_t X, Y, Z, YY, ZZ;
fmpq_init(x);
fmpq_init(y);
fmpq_init(z);
mpq_init(X);
mpq_init(Y);
mpq_init(Z);
mpq_init(YY);
mpq_init(ZZ);
fmpq_randtest(x, state, 200);
fmpq_randtest(y, state, 200);
do { fmpq_randtest(z, state, 200); } while (fmpq_is_zero(z));
fmpq_get_mpq(X, x);
fmpq_get_mpq(Y, y);
fmpq_get_mpq(Z, z);
fmpq_inv(y, z);
fmpq_inv(x, y);
if (!fmpq_equal(x, z))
{
flint_printf("FAIL: applying inv twice did not give back the input!\n");
abort();
}
if (!fmpq_is_canonical(y) || !fmpq_is_canonical(x))
{
flint_printf("FAIL: result not canonical!\n");
abort();
}
mpq_inv(Y, Z);
mpq_inv(X, Z);
fmpq_get_mpq(YY, y);
fmpq_get_mpq(ZZ, z);
if (!mpq_equal(Y, YY) || !mpq_equal(Z, ZZ))
{
flint_printf("FAIL: fmpq_inv != mpq_inv\n");
flint_printf("x = ");
fmpq_print(x);
flint_printf("\ny = ");
fmpq_print(y);
flint_printf("\nz = ");
fmpq_print(z);
flint_printf("\n");
abort();
}
fmpq_clear(x);
fmpq_clear(y);
fmpq_clear(z);
mpq_clear(X);
mpq_clear(Y);
mpq_clear(Z);
mpq_clear(YY);
mpq_clear(ZZ);
}
/* Check aliasing */
for (i = 0; i < 10000; i++)
{
fmpq_t x;
mpq_t X, Y;
fmpq_init(x);
mpq_init(X);
mpq_init(Y);
do { fmpq_randtest(x, state, 200); } while (fmpq_is_zero(x));
fmpq_get_mpq(X, x);
fmpq_inv(x, x);
if (!fmpq_is_canonical(x))
{
flint_printf("FAIL: result not canonical!\n");
abort();
}
mpq_inv(X, X);
fmpq_get_mpq(Y, x);
if (!mpq_equal(X, Y))
{
flint_printf("FAIL: fmpq_mul(x,x,y) != mpq_mul(X,X,Y)\n");
flint_printf("x = ");
fmpq_print(x);
flint_printf("\n");
abort();
}
fmpq_clear(x);
mpq_clear(X);
mpq_clear(Y);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}