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