github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/tests/mpz/t-sqrtrem.c (about)

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