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