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
      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
     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
     119  debug_mp (mpz_t x, int base)
     120  {
     121    mpz_out_str (stderr, base, x); fputc ('\n', stderr);
     122  }