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/* Exercise mpz_get_si.
Copyright 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The GNU MP Library 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp.h"
#include "gmp-impl.h"
#include "tests.h"
void
check_data (void)
{
static const struct {
const char *n;
long want;
} data[] = {
{ "0", 0L },
{ "1", 1L },
{ "-1", -1L },
{ "2", 2L },
{ "-2", -2L },
{ "12345", 12345L },
{ "-12345", -12345L },
};
int i;
mpz_t n;
long got;
mpz_init (n);
for (i = 0; i < numberof (data); i++)
{
mpz_set_str_or_abort (n, data[i].n, 0);
got = mpz_get_si (n);
if (got != data[i].want)
{
printf ("mpz_get_si wrong at data[%d]\n", i);
printf (" n \"%s\" (", data[i].n);
mpz_out_str (stdout, 10, n); printf (", hex ");
mpz_out_str (stdout, 16, n); printf (")\n");
printf (" got %ld (0x%lX)\n", got, got);
printf (" want %ld (0x%lX)\n", data[i].want, data[i].want);
abort();
}
}
mpz_clear (n);
}
void
check_max (void)
{
mpz_t n;
long want;
long got;
mpz_init (n);
#define CHECK_MAX(name) \
if (got != want) \
{ \
printf ("mpz_get_si wrong on %s\n", name); \
printf (" n "); \
mpz_out_str (stdout, 10, n); printf (", hex "); \
mpz_out_str (stdout, 16, n); printf ("\n"); \
printf (" got %ld, hex %lX\n", got, got); \
printf (" want %ld, hex %lX\n", want, want); \
abort(); \
}
want = LONG_MAX;
mpz_set_si (n, want);
got = mpz_get_si (n);
CHECK_MAX ("LONG_MAX");
want = LONG_MIN;
mpz_set_si (n, want);
got = mpz_get_si (n);
CHECK_MAX ("LONG_MIN");
/* The following checks that -0x100000000 gives -0x80000000. This doesn't
actually fit in a long and the result from mpz_get_si() is undefined,
but -0x80000000 is what comes out currently, and it should be that
value irrespective of the mp_limb_t size (long or long long). */
want = LONG_MIN;
mpz_mul_2exp (n, n, 1);
CHECK_MAX ("-0x100...00");
mpz_clear (n);
}
int
main (void)
{
tests_start ();
check_data ();
check_max ();
tests_end ();
exit (0);
}
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