pqc/external/flint-2.4.3/fmpz/test/t-fits_si.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) 2009 William Hart
Copyright (C) 2011 Sebastian Pancratz
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <gmp.h>
#include "flint.h"
#include "ulong_extras.h"
#include "fmpz.h"
static void check(fmpz_t x, int expected)
{
if (fmpz_fits_si(x) != expected)
{
flint_printf("FAIL:\n\n");
flint_printf("x = "), fmpz_print(x), flint_printf("\n");
flint_printf("fmpz_fits_si(x) = %d\n", fmpz_fits_si(x));
flint_printf("WORD_MIN = %wd\n", WORD_MIN);
abort();
}
}
int
main(void)
{
slong i;
fmpz_t x;
FLINT_TEST_INIT(state);
flint_printf("fits_si....");
fflush(stdout);
fmpz_init(x);
fmpz_set_si(x, COEFF_MIN);
check(x, 1);
fmpz_set_si(x, COEFF_MAX);
check(x, 1);
fmpz_set_si(x, WORD_MAX);
check(x, 1);
fmpz_set_si(x, WORD_MIN);
check(x, 1);
fmpz_set_ui(x, UWORD_MAX);
check(x, 0);
fmpz_set_ui(x, UWORD_MAX);
fmpz_neg(x, x);
check(x, 0);
fmpz_set_si(x, WORD_MAX);
fmpz_add_ui(x, x, 1);
check(x, 0);
fmpz_set_si(x, WORD_MIN);
fmpz_sub_ui(x, x, 1);
check(x, 0);
for (i = 0; i < 1000; i++)
{
fmpz_set_ui(x, 1);
fmpz_mul_2exp(x, x, i);
check(x, i < FLINT_BITS - 1);
fmpz_neg(x, x);
check(x, i < FLINT_BITS); /* WORD_MIN fits */
}
fmpz_clear(x);
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return EXIT_SUCCESS;
}