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.h"
23 #include "gmp-impl.h"
24 #include "tests.h"
25
26
27 void
check_data(void)28 check_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
68 void
check_max(void)69 check_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
112 int
main(void)113 main (void)
114 {
115 tests_start ();
116
117 check_data ();
118 check_max ();
119
120 tests_end ();
121 exit (0);
122 }
123