1/* Exercise mpz_get_si.
2
3Copyright 2000, 2001 Free Software Foundation, Inc.
4
5This file is part of the GNU MP Library.
6
7The GNU MP Library is free software; you can redistribute it and/or modify
8it under the terms of the GNU Lesser General Public License as published by
9the Free Software Foundation; either version 3 of the License, or (at your
10option) any later version.
11
12The GNU MP Library is distributed in the hope that it will be useful, but
13WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
15License for more details.
16
17You should have received a copy of the GNU Lesser General Public License
18along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
19
20#include <stdio.h>
21#include <stdlib.h>
22#include "gmp.h"
23#include "gmp-impl.h"
24#include "tests.h"
25
26
27void
28check_data (void)
29{
30  static const struct {
31    const char  *n;
32    long        want;
33  } data[] = {
34    { "0",      0L },
35    { "1",      1L },
36    { "-1",     -1L },
37    { "2",      2L },
38    { "-2",     -2L },
39    { "12345",  12345L },
40    { "-12345", -12345L },
41  };
42
43  int    i;
44  mpz_t  n;
45  long   got;
46
47  mpz_init (n);
48  for (i = 0; i < numberof (data); i++)
49    {
50      mpz_set_str_or_abort (n, data[i].n, 0);
51
52      got = mpz_get_si (n);
53      if (got != data[i].want)
54	{
55	  printf ("mpz_get_si wrong at data[%d]\n", i);
56	  printf ("   n     \"%s\" (", data[i].n);
57	  mpz_out_str (stdout, 10, n); printf (", hex ");
58	  mpz_out_str (stdout, 16, n); printf (")\n");
59	  printf ("   got   %ld (0x%lX)\n", got, got);
60	  printf ("   want  %ld (0x%lX)\n", data[i].want, data[i].want);
61	  abort();
62	}
63    }
64  mpz_clear (n);
65}
66
67
68void
69check_max (void)
70{
71  mpz_t  n;
72  long   want;
73  long   got;
74
75  mpz_init (n);
76
77#define CHECK_MAX(name)                                 \
78  if (got != want)                                      \
79    {                                                   \
80      printf ("mpz_get_si wrong on %s\n", name);        \
81      printf ("   n    ");                              \
82      mpz_out_str (stdout, 10, n); printf (", hex ");   \
83      mpz_out_str (stdout, 16, n); printf ("\n");       \
84      printf ("   got  %ld, hex %lX\n", got, got);      \
85      printf ("   want %ld, hex %lX\n", want, want);    \
86      abort();                                          \
87    }
88
89  want = LONG_MAX;
90  mpz_set_si (n, want);
91  got = mpz_get_si (n);
92  CHECK_MAX ("LONG_MAX");
93
94  want = LONG_MIN;
95  mpz_set_si (n, want);
96  got = mpz_get_si (n);
97  CHECK_MAX ("LONG_MIN");
98
99  /* The following checks that -0x100000000 gives -0x80000000.  This doesn't
100     actually fit in a long and the result from mpz_get_si() is undefined,
101     but -0x80000000 is what comes out currently, and it should be that
102     value irrespective of the mp_limb_t size (long or long long).  */
103
104  want = LONG_MIN;
105  mpz_mul_2exp (n, n, 1);
106  CHECK_MAX ("-0x100...00");
107
108  mpz_clear (n);
109}
110
111
112int
113main (void)
114{
115  tests_start ();
116
117  check_data ();
118  check_max ();
119
120  tests_end ();
121  exit (0);
122}
123