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

125 lines
3.6 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) 2009 William Hart
Copyright (C) 2010 Sebastian Pancratz
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "fmpz.h"
#include "fmpq_poly.h"
#include "ulong_extras.h"
int
main(void)
{
int i, result;
ulong cflags = UWORD(0);
FLINT_TEST_INIT(state);
flint_printf("primitive_part....");
fflush(stdout);
/* Check aliasing */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
fmpq_poly_t f, g;
fmpq_t x;
fmpq_init(x);
fmpq_poly_init(f);
fmpq_poly_init(g);
fmpq_poly_randtest(f, state, n_randint(state, 100), 200);
fmpq_randtest(x, state, 100);
fmpq_poly_scalar_mul_fmpq(f, f, x);
fmpq_poly_primitive_part(g, f);
fmpq_poly_primitive_part(f, f);
cflags |= fmpq_poly_is_canonical(f) ? 0 : 1;
cflags |= fmpq_poly_is_canonical(g) ? 0 : 2;
result = (fmpq_poly_equal(f, g) && !cflags);
if (!result)
{
flint_printf("FAIL:\n");
fmpq_poly_debug(f), flint_printf("\n\n");
fmpq_poly_debug(g), flint_printf("\n\n");
flint_printf("cflags = %wu\n\n", cflags);
abort();
}
fmpq_clear(x);
fmpq_poly_clear(f);
fmpq_poly_clear(g);
}
/* Check that content(f) primitive_part(f) = +- f */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
fmpq_poly_t f, g;
fmpq_t x, y;
fmpq_init(x);
fmpq_init(y);
fmpq_poly_init(f);
fmpq_poly_init(g);
fmpq_poly_randtest(f, state, n_randint(state, 100), 200);
fmpq_randtest(x, state, 100);
fmpq_poly_scalar_mul_fmpq(f, f, x);
fmpq_poly_content(y, f);
fmpq_poly_primitive_part(g, f);
fmpq_poly_scalar_mul_fmpq(g, g, y);
if (!fmpq_poly_is_zero(f) && fmpz_sgn(f->coeffs + (f->length - 1)) < 0)
fmpq_poly_neg(g, g);
cflags |= fmpq_poly_is_canonical(f) ? 0 : 1;
cflags |= fmpq_poly_is_canonical(g) ? 0 : 2;
result = (fmpq_poly_equal(f, g) && !cflags);
if (!result)
{
flint_printf("FAIL:\n");
fmpq_poly_debug(f), flint_printf("\n\n");
fmpq_poly_debug(g), flint_printf("\n\n");
flint_printf("cflags = %wu\n\n", cflags);
abort();
}
fmpq_clear(x);
fmpq_clear(y);
fmpq_poly_clear(f);
fmpq_poly_clear(g);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}