1 /* Test mpz_add, mpz_add_ui, mpz_cmp, mpz_cmp, mpz_mul, mpz_sqrtrem.
2
3 Copyright 1991, 1993, 1994, 1996, 2000-2002 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
23 #include "gmp-impl.h"
24 #include "tests.h"
25
26 void dump_abort (mpz_t, mpz_t, mpz_t);
27 void debug_mp (mpz_t, int);
28
29 int
main(int argc,char ** argv)30 main (int argc, char **argv)
31 {
32 mpz_t x2;
33 mpz_t x, rem;
34 mpz_t temp, temp2;
35 mp_size_t x2_size;
36 int i;
37 int reps = 1000;
38 gmp_randstate_ptr rands;
39 mpz_t bs;
40 unsigned long size_range;
41
42 tests_start ();
43 TESTS_REPS (reps, argv, argc);
44
45 rands = RANDS;
46
47 mpz_init (bs);
48
49 mpz_init (x2);
50 mpz_init (x);
51 mpz_init (rem);
52 mpz_init (temp);
53 mpz_init (temp2);
54
55 for (i = 0; i < reps; i++)
56 {
57 mpz_urandomb (bs, rands, 32);
58 size_range = mpz_get_ui (bs) % 17 + 2; /* 0..262144 bit operands */
59
60 mpz_urandomb (bs, rands, size_range);
61 x2_size = mpz_get_ui (bs);
62 mpz_rrandomb (x2, rands, x2_size);
63
64 /* printf ("%ld\n", SIZ (x2)); */
65
66 mpz_sqrt (temp, x2);
67 MPZ_CHECK_FORMAT (temp);
68
69 mpz_sqrtrem (x, rem, x2);
70 MPZ_CHECK_FORMAT (x);
71 MPZ_CHECK_FORMAT (rem);
72
73 /* Are results different? */
74 if (mpz_cmp (temp, x) != 0)
75 dump_abort (x2, x, rem);
76
77 mpz_mul (temp, x, x);
78
79 /* Is square of result > argument? */
80 if (mpz_cmp (temp, x2) > 0)
81 dump_abort (x2, x, rem);
82
83 mpz_add_ui (temp2, x, 1);
84 mpz_mul (temp2, temp2, temp2);
85
86 /* Is square of (result + 1) <= argument? */
87 if (mpz_cmp (temp2, x2) <= 0)
88 dump_abort (x2, x, rem);
89
90 mpz_add (temp2, temp, rem);
91
92 /* Is the remainder wrong? */
93 if (mpz_cmp (x2, temp2) != 0)
94 dump_abort (x2, x, rem);
95 }
96
97 mpz_clear (bs);
98 mpz_clear (x2);
99 mpz_clear (x);
100 mpz_clear (rem);
101 mpz_clear (temp);
102 mpz_clear (temp2);
103
104 tests_end ();
105 exit (0);
106 }
107
108 void
dump_abort(mpz_t x2,mpz_t x,mpz_t rem)109 dump_abort (mpz_t x2, mpz_t x, mpz_t rem)
110 {
111 fprintf (stderr, "ERROR\n");
112 fprintf (stderr, "x2 = "); debug_mp (x2, -16);
113 fprintf (stderr, "x = "); debug_mp (x, -16);
114 fprintf (stderr, "remainder = "); debug_mp (rem, -16);
115 abort();
116 }
117
118 void
debug_mp(mpz_t x,int base)119 debug_mp (mpz_t x, int base)
120 {
121 mpz_out_str (stderr, base, x); fputc ('\n', stderr);
122 }
123