/* Test that routines allow reusing a source variable as destination.

Copyright 1996, 2000, 2001, 2002, 2012 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 http://www.gnu.org/licenses/.  */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "gmp.h"
#include "gmp-impl.h"
#include "tests.h"

#if __GMP_LIBGMP_DLL

/* FIXME: When linking to a DLL libgmp, mpq_add etc can't be used as
   initializers for global variables because they're effectively global
   variables (function pointers) themselves.  Perhaps calling a test
   function successively with mpq_add etc would be better.  */

int
main (void)
{
  printf ("Test suppressed for windows DLL\n");
  exit (0);
}


#else /* ! DLL_EXPORT */

#ifndef SIZE
#define SIZE 16
#endif

void dump_abort (const char *, mpq_t, mpq_t);

typedef void (*dss_func) (mpq_ptr, mpq_srcptr, mpq_srcptr);

dss_func dss_funcs[] =
{
  mpq_div, mpq_add, mpq_mul, mpq_sub,
};

const char *dss_func_names[] =
{
  "mpq_div", "mpq_add", "mpq_mul", "mpq_sub",
};

typedef void (*ds_func) (mpq_ptr, mpq_srcptr);

ds_func ds_funcs[] =
{
  mpq_abs, mpq_neg,
};

const char *ds_func_names[] =
{
  "mpq_abs", "mpq_neg",
};

typedef void (*dsi_func) (mpq_ptr, mpq_srcptr, unsigned long int);

dsi_func dsi_funcs[] =
{
  mpq_mul_2exp, mpq_div_2exp
};

const char *dsi_func_names[] =
{
  "mpq_mul_2exp", "mpq_div_2exp"
};

int
main (int argc, char **argv)
{
  int i;
  int pass, reps = 100;
  mpq_t in1, in2, out1;
  unsigned long int randbits, in2i;
  mpq_t res1, res2, res3;
  gmp_randstate_ptr  rands;

  tests_start ();

  if (argc > 1)
    reps = strtol (argv[1], 0, 0);

  rands = RANDS;

  mpq_init (in1);
  mpq_init (in2);
  mpq_init (out1);
  mpq_init (res1);
  mpq_init (res2);
  mpq_init (res3);

  for (pass = 1; pass <= reps; pass++)
    {
      randbits = urandom ();

      if (randbits & 1)
	{
	  mpq_clear (in1);
	  mpq_init (in1);
	}
      randbits >>= 1;
      mpz_errandomb (mpq_numref(in1), rands, 512L);
      mpz_errandomb_nonzero (mpq_denref(in1), rands, 512L);
      if (randbits & 1)
	mpz_neg (mpq_numref(in1),mpq_numref(in1));
      randbits >>= 1;
      mpq_canonicalize (in1);

      if (randbits & 1)
	{
	  mpq_clear (in2);
	  mpq_init (in2);
	}
      randbits >>= 1;
      mpz_errandomb (mpq_numref(in2), rands, 512L);
      mpz_errandomb_nonzero (mpq_denref(in2), rands, 512L);
      if (randbits & 1)
	mpz_neg (mpq_numref(in2),mpq_numref(in2));
      randbits >>= 1;
      mpq_canonicalize (in2);

      for (i = 0; i < sizeof (dss_funcs) / sizeof (dss_func); i++)
	{
	  /* Don't divide by 0.  */
	  if (i == 0 && mpq_cmp_ui (in2, 0, 1) == 0)
	    continue;

	  if (randbits & 1)
	    {
	      mpq_clear (res1);
	      mpq_init (res1);
	    }
	  randbits >>= 1;

	  (dss_funcs[i]) (res1, in1, in2);

	  mpq_set (out1, in1);
	  (dss_funcs[i]) (out1, out1, in2);
	  mpq_set (res2, out1);

	  mpq_set (out1, in2);
	  (dss_funcs[i]) (out1, in1, out1);
	  mpq_set (res3, out1);

	  if (mpq_cmp (res1, res2) != 0)
	    dump_abort (dss_func_names[i], res1, res2);
	  if (mpq_cmp (res1, res3) != 0)
	    dump_abort (dss_func_names[i], res1, res3);
	}

      for (i = 0; i < sizeof (ds_funcs) / sizeof (ds_func); i++)
	{
	  if (randbits & 1)
	    {
	      mpq_clear (res1);
	      mpq_init (res1);
	    }
	  randbits >>= 1;
	  (ds_funcs[i]) (res1, in1);

	  mpq_set (out1, in1);
	  (ds_funcs[i]) (out1, out1);
	  mpq_set (res2, out1);

	  if (mpq_cmp (res1, res2) != 0)
	    dump_abort (ds_func_names[i], res1, res2);
	}

      in2i = urandom () % 65536;
      for (i = 0; i < sizeof (dsi_funcs) / sizeof (dsi_func); i++)
	{
	  if (randbits & 1)
	    {
	      mpq_clear (res1);
	      mpq_init (res1);
	    }
	  randbits >>= 1;

	  (dsi_funcs[i]) (res1, in1, in2i);

	  mpq_set (out1, in1);
	  (dsi_funcs[i]) (out1, out1, in2i);
	  mpq_set (res2, out1);

	  if (mpq_cmp (res1, res2) != 0)
	    dump_abort (dsi_func_names[i], res1, res2);
	}

    }

  mpq_clear (in1);
  mpq_clear (in2);
  mpq_clear (out1);
  mpq_clear (res1);
  mpq_clear (res2);
  mpq_clear (res3);

  tests_end ();
  exit (0);
}

void
dump_abort (const char *name, mpq_t res1, mpq_t res2)
{
  printf ("failure in %s:\n", name);
  mpq_trace ("  res1  ", res1);
  mpq_trace ("  res2  ", res2);
  abort ();
}

#endif /* ! DLL_EXPORT */
