/* Test file for mpfr_out_str.

Copyright 1999, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.

This file is part of the MPFR Library.

The MPFR 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 MPFR 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 MPFR 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 <float.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include "mpfr-test.h"

FILE *fout;

#define check(d,r,b) check4(d,r,b,53)

static void
check4 (double d, mp_rnd_t rnd, int base, int prec)
{
  mpfr_t x;

  mpfr_init2 (x, prec);
  mpfr_set_d (x, d, rnd);
  fprintf (fout, "%1.19e base %d rnd %d:\n ", d, base, rnd);
  mpfr_out_str (fout, base, (base == 2) ? prec : 0, x, rnd);
  fputc ('\n', fout);
  mpfr_clear (x);
}

static void
check_large (void)
{
  mpfr_t x; mp_exp_t e; char *s;

  mpfr_init(x);

  mpfr_set_prec (x, 7);
  mpfr_set_str_binary (x, "0.1010101E10");
  s = mpfr_get_str (NULL, &e, 10, 2, x, GMP_RNDU);
  (*__gmp_free_func) (s, strlen (s) + 1);

  /* checks rounding of negative numbers */
  mpfr_set_prec (x, 7);
  mpfr_set_str (x, "-11.5", 10, GMP_RNDN);
  s = mpfr_get_str (NULL, &e, 10, 2, x, GMP_RNDD);
  if (strcmp (s, "-12"))
    {
      printf ("Error in mpfr_get_str for x=-11.5 and rnd=GMP_RNDD\n"
              "got %s instead of -12\n", s);
      free (s);
      mpfr_clear (x);
      exit (1);
  }
  (*__gmp_free_func) (s, strlen (s) + 1);

  s = mpfr_get_str (NULL, &e, 10, 2, x, GMP_RNDU);
  if (strcmp (s, "-11"))
    {
      printf ("Error in mpfr_get_str for x=-11.5 and rnd=GMP_RNDU\n");
      free (s);
      mpfr_clear (x);
      exit (1);
    }
  (*__gmp_free_func) (s, strlen (s) + 1);

  /* bug found by Jean-Pierre Merlet, produced error in mpfr_get_str */
  mpfr_set_prec (x, 128);
  mpfr_set_str_binary (x, "0.10111001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011010E3");
  s = mpfr_get_str (NULL, &e, 10, 0, x, GMP_RNDU);
  (*__gmp_free_func) (s, strlen (s) + 1);

  mpfr_set_prec (x, 381);
  mpfr_set_str_binary (x, "0.111111111111111111111111111111111111111111111111111111111111111111101110110000100110011101101101001010111000101111000100100011110101010110101110100000010100001000110100000100011111001000010010000010001010111001011110000001110010111101100001111000101101100000010110000101100100000101010110010110001010100111001111100011100101100000100100111001100010010011110011011010110000001000010");
  s = mpfr_get_str (NULL, &e, 10, 0, x, GMP_RNDD);
  if (e != 0)
    {
      printf ("Error in mpfr_get_str for x=0.999999..., exponent is %d"
              " instead of 0\n", (int) e);
      exit (1);
    }
  (*__gmp_free_func) (s, strlen (s) + 1);

  mpfr_clear (x);
}

static void
special (void)
{
  mpfr_t x;

  mpfr_init (x);

  mpfr_set_nan (x);
  mpfr_out_str (fout, 10, 0, x, GMP_RNDN);

  mpfr_set_inf (x, 1);
  mpfr_out_str (fout, 10, 0, x, GMP_RNDN);

  mpfr_set_inf (x, -1);
  mpfr_out_str (fout, 10, 0, x, GMP_RNDN);

  mpfr_set_ui (x, 0, GMP_RNDN);
  mpfr_out_str (fout, 10, 0, x, GMP_RNDN);
  mpfr_neg (x, x, GMP_RNDN);
  mpfr_out_str (fout, 10, 0, x, GMP_RNDN);
  
  mpfr_clear (x);
}

int
main (int argc, char *argv[])
{
  int i, N=10000, r, p;
  double d;

  tests_start_mpfr ();

  /* with no argument: prints to /dev/null,
     tout_str N: prints N tests to stdout */
  if (argc == 1)
    {
      fout = fopen ("/dev/null", "w");
      /* If we failed to open this device, try with a dummy file */
      if (fout == NULL)
	fout = fopen ("mpfrtest.txt", "w");
    }
  else
    {
      fout = stdout;
      N = atoi (argv[1]);
    }

  if (fout == NULL)
    {
      printf ("Can't open /dev/null or stdout\n");
      exit (1);
    }

  special ();

  check_large ();

  check (-1.37247529013405550000e+15, GMP_RNDN, 7);
  check (-1.5674376729569697500e+15, GMP_RNDN, 19);
  check (-5.71262771772792640000e-79, GMP_RNDU, 16);
  check (-0.0, GMP_RNDU, 7);
  check (-4.5306392613572974756e-308, GMP_RNDN, 8);
  check (-6.7265890111403371523e-165, GMP_RNDN, 4);
  check (-1.3242553591261807653e+156, GMP_RNDN, 16);
  check (-6.606499965302424244461355e233, GMP_RNDN, 10);
  check4 (1.0, GMP_RNDN, 10, 120);
  check (1.0, GMP_RNDU, 10);
  check (4.059650008e-83, GMP_RNDN, 10);
  check (-7.4, GMP_RNDN, 10);
  check (0.997, GMP_RNDN, 10);
  check (-4.53063926135729747564e-308, GMP_RNDN, 10);
  check (2.14478198760196000000e+16, GMP_RNDN, 10);
  check (7.02293374921793516813e-84, GMP_RNDN, 10);

  /* random tests */
  for (i=0;i<N;i++)
    {
      do
        {
          d = DBL_RAND ();
        }
#ifdef HAVE_DENORMS
      while (0);
#else
      while (ABS(d) < DBL_MIN);
#endif
      r = RND_RAND ();
      p = 2 + randlimb () % 35;
      check (d, (mp_rnd_t) r, p);
    }

  fclose (fout);

  tests_end_mpfr ();
  return 0;
}