/* Exercise mpz_get_si.

Copyright 2000, 2001 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 "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);

}