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

Copyright (C) 1996, 2000 Free Software Foundation, Inc.

This file is part of the GNU MP Library.

The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version.

The GNU MP Library 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 Lesser General Public
License for more details.

You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */

#include <stdio.h>
#include "gmp.h"
#include "gmp-impl.h"
#include "urandom.h"

#ifndef SIZE
#define SIZE 16
#endif

#ifndef EXPO
#define EXPO 32
#endif

#if __STDC__
typedef void (*dss_func) (mpf_ptr, mpf_srcptr, mpf_srcptr);
#else
typedef void (*dss_func) ();
#endif

dss_func dss_funcs[] =
{
  mpf_div, mpf_add, mpf_mul, mpf_sub,
};

char *dss_func_names[] =
{
  "mpf_div", "mpf_add", "mpf_mul", "mpf_sub",
};

#if __STDC__
typedef void (*dsi_func) (mpf_ptr, mpf_srcptr, unsigned long int);
#else
typedef void (*dsi_func) ();
#endif

dsi_func dsi_funcs[] =
{
  mpf_div_ui, mpf_add_ui, mpf_mul_ui, mpf_sub_ui,
  mpf_mul_2exp, mpf_div_2exp
};

char *dsi_func_names[] =
{
  "mpf_div_ui", "mpf_add_ui", "mpf_mul_ui", "mpf_sub_ui",
  "mpf_mul_2exp", "mpf_div_2exp"
};

#if __STDC__
typedef void (*dis_func) (mpf_ptr, unsigned long int, mpf_srcptr);
#else
typedef void (*dis_func) ();
#endif

dis_func dis_funcs[] =
{
  mpf_ui_div, mpf_ui_sub,
};

char *dis_func_names[] =
{
  "mpf_ui_div", "mpf_ui_sub",
};

main (argc, argv)
     int argc;
     char **argv;
{
  int i;
  int pass, reps = 100000;
  mpf_t in1, in2, out1;
  unsigned long int in1i, in2i;
  mpf_t res1, res2, res3;
  mp_size_t bprec = 100;

  if (argc > 1)
    {
      reps = strtol (argv[1], 0, 0);
      if (argc > 2)
	bprec = strtol (argv[2], 0, 0);
    }

  mpf_set_default_prec (bprec);

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

  for (pass = 1; pass <= reps; pass++)
    {
      mpf_random2 (in1, urandom () % SIZE - SIZE/2, urandom () % EXPO);
      mpf_random2 (in2, urandom () % SIZE - SIZE/2, urandom () % EXPO);

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

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

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

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

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

      in2i = urandom ();
      for (i = 0; i < sizeof (dsi_funcs) / sizeof (dsi_func); i++)
	{
	  /* Don't divide by 0.  */
	  if (strcmp (dsi_func_names[i], "mpf_div_ui") == 0 && in2i == 0)
	    continue;

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

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

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

      in1i = urandom ();
      for (i = 0; i < sizeof (dis_funcs) / sizeof (dis_func); i++)
	{
	  /* Don't divide by 0.  */
	  if (strcmp (dis_func_names[i], "mpf_ui_div") == 0
	      && mpf_cmp_ui (in2, 0) == 0)
	    continue;

	  (dis_funcs[i]) (res1, in1i, in2);

	  mpf_set (out1, in2);
	  (dis_funcs[i]) (out1, in1i, out1);
	  mpf_set (res2, out1);

	  if (mpf_cmp (res1, res2) != 0)
	    dump_abort (dis_func_names[i], res1, res2);
	}

    }

  exit (0);
}

dump_abort (name, res1, res2)
     char *name;
     mpf_t res1, res2;
{
  printf ("failure in %s:\n", name);
  oo (res1);
  oo (res2);
  abort ();
}

oo (x)
     mpf_t x;
{
  mp_size_t i;
  printf (" exp = %ld\n", x->_mp_exp);
  printf ("size = %d\n", x->_mp_size);
  for (i = ABS (x->_mp_size) - 1; i >= 0; i--)
    printf ("%08lX ", x->_mp_d[i]);
  printf ("\n");
  mpf_dump (x);
}

#if 0
void mpf_abs		_PROTO ((mpf_ptr, mpf_srcptr));
void mpf_sqrt		_PROTO ((mpf_ptr, mpf_srcptr));
void mpf_neg		_PROTO ((mpf_ptr, mpf_srcptr));
#endif