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/* Exercise some mpz_..._si functions.
Copyright 2013 Free Software Foundation, Inc.
This file is part of the GNU MP Library test suite.
The GNU MP Library test suite 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 3 of the License,
or (at your option) any later version.
The GNU MP Library test suite 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
the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include "testutils.h"
int
check_si (mpz_t sz, mpz_t oz, long si, long oi, int c)
{
mpz_t t;
int fail;
if (mpz_cmp_si (sz, oi) != c)
{
printf ("mpz_cmp_si (sz, %ld) != %i.\n", oi, c);
printf (" sz="); mpz_out_str (stdout, 10, sz); printf ("\n");
abort ();
}
if ((si < oi ? -1 : si > oi) != c)
return 1;
mpz_init_set_si (t, si);
if ((fail = mpz_cmp_si (sz, si)) != 0)
printf ("mpz_cmp_si (sz, %ld) != 0.\n", si);
if (mpz_cmp_si (oz, si) != -c)
printf ("mpz_cmp_si (oz, %ld) != %i.\n", si, -c), fail = 1;
if (! mpz_fits_slong_p (sz))
printf ("mpz_fits_slong_p (sz) != 1.\n"), fail = 1;
if (mpz_get_si (sz) != si)
printf ("mpz_get_si (sz) != %ld.\n", si), fail = 1;
if (mpz_cmp (t, sz) != 0)
{
printf ("mpz_init_set_si (%ld) failed.\n", si);
printf (" got="); mpz_out_str (stdout, 10, t); printf ("\n");
fail = 1;
}
mpz_clear (t);
if (fail)
{
printf (" sz="); mpz_out_str (stdout, 10, sz); printf ("\n");
printf (" oz="); mpz_out_str (stdout, 10, oz); printf ("\n");
printf (" si=%ld\n", si);
abort ();
}
return 0;
}
void
try_op_si (int c)
{
long si, oi;
mpz_t sz, oz;
si = c;
mpz_init_set_si (sz, si);
oi = si;
mpz_init_set (oz, sz);
do {
si *= 2; /* c * 2^k */
mpz_mul_2exp (sz, sz, 1);
if (check_si (sz, oz, si, oi, c))
{
mpz_set (oz, sz);
break;
}
oi = si + c; /* c * (2^k + 1) */
if (c == -1)
mpz_sub_ui (oz, sz, 1);
else
mpz_add_ui (oz, sz, 1);
if (check_si (oz, sz, oi, si, c))
break;
oi = (si - c) * 2 + c; /* c * (2^K - 1) */
mpz_mul_si (oz, sz, 2*c);
if (c == -1)
mpz_ui_sub (oz, 1, oz); /* oz = sz * 2 + 1 */
else
mpz_sub_ui (oz, oz, 1); /* oz = sz * 2 - 1 */
} while (check_si (oz, sz, oi, si, c) == 0);
mpz_clear (sz);
if (mpz_fits_slong_p (oz))
{
printf ("Should not fit a signed long any more.\n");
printf (" oz="); mpz_out_str (stdout, 10, oz); printf ("\n");
abort ();
}
if (mpz_cmp_si (oz, -c) != c)
{
printf ("mpz_cmp_si (oz, %i) != %i.\n", c, c);
printf (" oz="); mpz_out_str (stdout, 10, oz); printf ("\n");
abort ();
}
mpz_mul_2exp (oz, oz, 1);
if (mpz_cmp_si (oz, -c) != c)
{
printf ("mpz_cmp_si (oz, %i) != %i.\n", c, c);
printf (" oz="); mpz_out_str (stdout, 10, oz); printf ("\n");
abort ();
}
mpz_clear (oz);
}
void
testmain (int argc, char *argv[])
{
try_op_si (-1);
try_op_si (1);
}
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