/* Test mpz_add, mpz_add_ui, mpz_cmp, mpz_cmp, mpz_mul, mpz_sqrtrem.

Copyright 1991, 1993, 1994, 1996, 2000-2002 Free Software Foundation, Inc.

This file is part of the GNU MP Library test suite.

The GNU MP Library test suite is free software; you can redistribute it

and/or modify it under the terms of the GNU General Public License as

published by the Free Software Foundation; either version 3 of the License,

or (at your option) any later version.

The GNU MP Library test suite is distributed in the hope that it will be

useful, but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General

Public License for more details.

You should have received a copy of the GNU General Public License along with

the GNU MP Library test suite.  If not, see https://www.gnu.org/licenses/.  */

#include <stdio.h>

#include <stdlib.h>

#include "gmp.h"

#include "gmp-impl.h"

#include "tests.h"

void dump_abort (mpz_t, mpz_t, mpz_t);

void debug_mp (mpz_t, int);

int

main (int argc, char **argv)

{

  mpz_t x2;

  mpz_t x, rem;

  mpz_t temp, temp2;

  mp_size_t x2_size;

  int i;

  int reps = 1000;

  gmp_randstate_ptr rands;

  mpz_t bs;

  unsigned long size_range;

  tests_start ();

  TESTS_REPS (reps, argv, argc);

  rands = RANDS;

  mpz_init (bs);

  mpz_init (x2);

  mpz_init (x);

  mpz_init (rem);

  mpz_init (temp);

  mpz_init (temp2);

  for (i = 0; i < reps; i++)

    {

      mpz_urandomb (bs, rands, 32);

      size_range = mpz_get_ui (bs) % 17 + 2; /* 0..262144 bit operands */

      mpz_urandomb (bs, rands, size_range);

      x2_size = mpz_get_ui (bs);

      mpz_rrandomb (x2, rands, x2_size);

      /* printf ("%ld\n", SIZ (x2)); */

      mpz_sqrt (temp, x2);

      MPZ_CHECK_FORMAT (temp);

      mpz_sqrtrem (x, rem, x2);

      MPZ_CHECK_FORMAT (x);

      MPZ_CHECK_FORMAT (rem);

      /* Are results different?  */

      if (mpz_cmp (temp, x) != 0)

	dump_abort (x2, x, rem);

      mpz_mul (temp, x, x);

      /* Is square of result > argument?  */

      if (mpz_cmp (temp, x2) > 0)

	dump_abort (x2, x, rem);

      mpz_add_ui (temp2, x, 1);

      mpz_mul (temp2, temp2, temp2);

      /* Is square of (result + 1) <= argument?  */

      if (mpz_cmp (temp2, x2) <= 0)

	dump_abort (x2, x, rem);

      mpz_add (temp2, temp, rem);

      /* Is the remainder wrong?  */

      if (mpz_cmp (x2, temp2) != 0)

	dump_abort (x2, x, rem);

    }

  mpz_clear (bs);

  mpz_clear (x2);

  mpz_clear (x);

  mpz_clear (rem);

  mpz_clear (temp);

  mpz_clear (temp2);

  tests_end ();

  exit (0);

}

void

dump_abort (mpz_t x2, mpz_t x, mpz_t rem)

{

  fprintf (stderr, "ERROR\n");

  fprintf (stderr, "x2        = "); debug_mp (x2, -16);

  fprintf (stderr, "x         = "); debug_mp (x, -16);

  fprintf (stderr, "remainder = "); debug_mp (rem, -16);

  abort();

}

void

debug_mp (mpz_t x, int base)

{

  mpz_out_str (stderr, base, x); fputc ('\n', stderr);

}