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      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 }
    123