1/* Test mpz_add, mpz_add_ui, mpz_cmp, mpz_cmp, mpz_mul, mpz_sqrtrem.
2
3Copyright 1991, 1993, 1994, 1996, 2000, 2001, 2002 Free Software Foundation,
4Inc.
5
6This file is part of the GNU MP Library.
7
8The GNU MP Library is free software; you can redistribute it and/or modify
9it under the terms of the GNU Lesser General Public License as published by
10the Free Software Foundation; either version 3 of the License, or (at your
11option) any later version.
12
13The GNU MP Library is distributed in the hope that it will be useful, but
14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
16License for more details.
17
18You should have received a copy of the GNU Lesser General Public License
19along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
20
21#include <stdio.h>
22#include <stdlib.h>
23
24#include "gmp.h"
25#include "gmp-impl.h"
26#include "tests.h"
27
28void dump_abort __GMP_PROTO ((mpz_t, mpz_t, mpz_t));
29void debug_mp __GMP_PROTO ((mpz_t, int));
30
31int
32main (int argc, char **argv)
33{
34  mpz_t x2;
35  mpz_t x, rem;
36  mpz_t temp, temp2;
37  mp_size_t x2_size;
38  int i;
39  int reps = 1000;
40  gmp_randstate_ptr rands;
41  mpz_t bs;
42  unsigned long size_range;
43
44  tests_start ();
45  TESTS_REPS (reps, argv, argc);
46
47  rands = RANDS;
48
49  mpz_init (bs);
50
51  mpz_init (x2);
52  mpz_init (x);
53  mpz_init (rem);
54  mpz_init (temp);
55  mpz_init (temp2);
56
57  for (i = 0; i < reps; i++)
58    {
59      mpz_urandomb (bs, rands, 32);
60      size_range = mpz_get_ui (bs) % 17 + 2; /* 0..262144 bit operands */
61
62      mpz_urandomb (bs, rands, size_range);
63      x2_size = mpz_get_ui (bs);
64      mpz_rrandomb (x2, rands, x2_size);
65
66      /* printf ("%ld\n", SIZ (x2)); */
67
68      mpz_sqrtrem (x, rem, x2);
69      MPZ_CHECK_FORMAT (x);
70      MPZ_CHECK_FORMAT (rem);
71
72      mpz_mul (temp, x, x);
73
74      /* Is square of result > argument?  */
75      if (mpz_cmp (temp, x2) > 0)
76	dump_abort (x2, x, rem);
77
78      mpz_add_ui (temp2, x, 1);
79      mpz_mul (temp2, temp2, temp2);
80
81      /* Is square of (result + 1) <= argument?  */
82      if (mpz_cmp (temp2, x2) <= 0)
83	dump_abort (x2, x, rem);
84
85      mpz_add (temp2, temp, rem);
86
87      /* Is the remainder wrong?  */
88      if (mpz_cmp (x2, temp2) != 0)
89	dump_abort (x2, x, rem);
90    }
91
92  mpz_clear (bs);
93  mpz_clear (x2);
94  mpz_clear (x);
95  mpz_clear (rem);
96  mpz_clear (temp);
97  mpz_clear (temp2);
98
99  tests_end ();
100  exit (0);
101}
102
103void
104dump_abort (mpz_t x2, mpz_t x, mpz_t rem)
105{
106  fprintf (stderr, "ERROR\n");
107  fprintf (stderr, "x2        = "); debug_mp (x2, -16);
108  fprintf (stderr, "x         = "); debug_mp (x, -16);
109  fprintf (stderr, "remainder = "); debug_mp (rem, -16);
110  abort();
111}
112
113void
114debug_mp (mpz_t x, int base)
115{
116  mpz_out_str (stderr, base, x); fputc ('\n', stderr);
117}
118