1/* Test mpz_lucnum_ui and mpz_lucnum2_ui.
2
3Copyright 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
27/* Usage: t-lucnum_ui [n]
28
29   Test up to L[n], or if n is omitted then the default limit below.  A
30   literal "x" for the limit means continue forever, this being meant only
31   for development.  */
32
33
34void
35check_sequence (int argc, char *argv[])
36{
37  unsigned long  n;
38  unsigned long  limit = 100 * GMP_LIMB_BITS;
39  mpz_t          want_ln, want_ln1, got_ln, got_ln1;
40
41  if (argc > 1 && argv[1][0] == 'x')
42    limit = ULONG_MAX;
43  else if (argc > 1)
44    limit = atoi (argv[1]);
45
46  /* start at n==0 */
47  mpz_init_set_si (want_ln1, -1); /* L[-1] */
48  mpz_init_set_ui (want_ln,  2);  /* L[0]   */
49  mpz_init (got_ln);
50  mpz_init (got_ln1);
51
52  for (n = 0; n < limit; n++)
53    {
54      mpz_lucnum2_ui (got_ln, got_ln1, n);
55      MPZ_CHECK_FORMAT (got_ln);
56      MPZ_CHECK_FORMAT (got_ln1);
57      if (mpz_cmp (got_ln, want_ln) != 0 || mpz_cmp (got_ln1, want_ln1) != 0)
58        {
59          printf ("mpz_lucnum2_ui(%lu) wrong\n", n);
60          mpz_trace ("want ln ", want_ln);
61          mpz_trace ("got  ln ",  got_ln);
62          mpz_trace ("want ln1", want_ln1);
63          mpz_trace ("got  ln1",  got_ln1);
64          abort ();
65        }
66
67      mpz_lucnum_ui (got_ln, n);
68      MPZ_CHECK_FORMAT (got_ln);
69      if (mpz_cmp (got_ln, want_ln) != 0)
70        {
71          printf ("mpz_lucnum_ui(%lu) wrong\n", n);
72          mpz_trace ("want ln", want_ln);
73          mpz_trace ("got  ln", got_ln);
74          abort ();
75        }
76
77      mpz_add (want_ln1, want_ln1, want_ln);  /* L[n+1] = L[n] + L[n-1] */
78      mpz_swap (want_ln1, want_ln);
79    }
80
81  mpz_clear (want_ln);
82  mpz_clear (want_ln1);
83  mpz_clear (got_ln);
84  mpz_clear (got_ln1);
85}
86
87int
88main (int argc, char *argv[])
89{
90  tests_start ();
91  mp_trace_base = -16;
92
93  check_sequence (argc, argv);
94
95  tests_end ();
96  exit (0);
97}
98