/* Test file for mpfr_cmp_ui and mpfr_cmp_si.

Copyright 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
Contributed by the Arenaire and Caramel projects, INRIA.

This file is part of the GNU MPFR Library.

The GNU 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 3 of the License, or (at your
option) any later version.

The GNU 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 GNU MPFR Library; see the file COPYING.LESSER.  If not, see
http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */

#ifdef TCMP_UI_CHECK_NAN

mpfr_clear_erangeflag ();
c = mpfr_cmp_si (x, TCMP_UI_CHECK_NAN);
if (c != 0 || !mpfr_erangeflag_p ())
  {
    printf ("NaN error on %d (1)\n", TCMP_UI_CHECK_NAN);
    exit (1);
  }
mpfr_clear_erangeflag ();
c = (mpfr_cmp_si) (x, TCMP_UI_CHECK_NAN);
if (c != 0 || !mpfr_erangeflag_p ())
  {
    printf ("NaN error on %d (2)\n", TCMP_UI_CHECK_NAN);
    exit (1);
  }
if (TCMP_UI_CHECK_NAN >= 0)
  {
    mpfr_clear_erangeflag ();
    c = mpfr_cmp_ui (x, TCMP_UI_CHECK_NAN);
    if (c != 0 || !mpfr_erangeflag_p ())
      {
        printf ("NaN error on %d (3)\n", TCMP_UI_CHECK_NAN);
        exit (1);
      }
    mpfr_clear_erangeflag ();
    c = (mpfr_cmp_ui) (x, TCMP_UI_CHECK_NAN);
    if (c != 0 || !mpfr_erangeflag_p ())
      {
        printf ("NaN error on %d (4)\n", TCMP_UI_CHECK_NAN);
        exit (1);
      }
  }

#else

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

#include "mpfr-test.h"

static void
check_nan (void)
{
  mpfr_t x;
  int c, i;

  mpfr_init (x);
  mpfr_set_nan (x);
  /* We need constants to completely test the macros. */
#undef TCMP_UI_CHECK_NAN
#define TCMP_UI_CHECK_NAN -17
#include "tcmp_ui.c"
#undef TCMP_UI_CHECK_NAN
#define TCMP_UI_CHECK_NAN 0
#include "tcmp_ui.c"
#undef TCMP_UI_CHECK_NAN
#define TCMP_UI_CHECK_NAN 17
#include "tcmp_ui.c"
  for (i = -17; i <= 17; i += 17)
    {
#undef TCMP_UI_CHECK_NAN
#define TCMP_UI_CHECK_NAN i
#include "tcmp_ui.c"
    }
  mpfr_clear (x);
}

/* Since mpfr_cmp_ui and mpfr_cmp_si are also implemented by a macro
   with __builtin_constant_p for GCC, check that side effects are
   handled correctly. */
static void
check_macros (void)
{
  mpfr_t x;
  int c;

  mpfr_init2 (x, 32);

  c = 0;
  mpfr_set_ui (x, 17, MPFR_RNDN);
  if (mpfr_cmp_ui (x, 17) != 0)
    {
      printf ("Error 1 on mpfr_cmp_ui(x,17) in check_macros\n");
      exit (1);
    }
  if (mpfr_cmp_ui (x, (c++, 17)) != 0)
    {
      printf ("Error 2 on mpfr_cmp_ui(x,17) in check_macros\n");
      exit (1);
    }
  if (c != 1)
    {
      printf ("Error 3 on mpfr_cmp_ui(x,17) in check_macros\n"
              "(c = %d instead of 1)\n", c);
      exit (1);
    }
  if (mpfr_cmp_si (x, 17) != 0)
    {
      printf ("Error 1 on mpfr_cmp_si(x,17) in check_macros\n");
      exit (1);
    }
  if (mpfr_cmp_si (x, (c++, 17)) != 0)
    {
      printf ("Error 2 on mpfr_cmp_si(x,17) in check_macros\n");
      exit (1);
    }
  if (c != 2)
    {
      printf ("Error 3 on mpfr_cmp_si(x,17) in check_macros\n"
              "(c = %d instead of 2)\n", c);
      exit (1);
    }

  c = 0;
  mpfr_set_ui (x, 0, MPFR_RNDN);
  if (mpfr_cmp_ui (x, 0) != 0)
    {
      printf ("Error 1 on mpfr_cmp_ui(x,0) in check_macros\n");
      exit (1);
    }
  if (mpfr_cmp_ui (x, (c++, 0)) != 0)
    {
      printf ("Error 2 on mpfr_cmp_ui(x,0) in check_macros\n");
      exit (1);
    }
  if (c != 1)
    {
      printf ("Error 3 on mpfr_cmp_ui(x,0) in check_macros\n"
              "(c = %d instead of 1)\n", c);
      exit (1);
    }
  if (mpfr_cmp_si (x, 0) != 0)
    {
      printf ("Error 1 on mpfr_cmp_si(x,0) in check_macros\n");
      exit (1);
    }
  if (mpfr_cmp_si (x, (c++, 0)) != 0)
    {
      printf ("Error 2 on mpfr_cmp_si(x,0) in check_macros\n");
      exit (1);
    }
  if (c != 2)
    {
      printf ("Error 3 on mpfr_cmp_si(x,0) in check_macros\n"
              "(c = %d instead of 2)\n", c);
      exit (1);
    }

  mpfr_clear (x);
}

/* Bug in r7114 */
static void
test_macros (void)
{
  mpfr_t x[3];
  mpfr_ptr p;

  mpfr_inits (x[0], x[1], x[2], (mpfr_ptr) 0);
  mpfr_set_ui (x[0], 0, MPFR_RNDN);
  p = x[0];
  if (mpfr_cmp_ui (p++, 0) != 0)
    {
      printf ("Error in mpfr_cmp_ui macro: result should be 0.\n");
      exit (1);
    }
  if (p != x[1])
    {
      printf ("Error in mpfr_cmp_ui macro: p - x[0] = %d (expecting 1)\n",
              (int) (p - x[0]));
      exit (1);
    }
  p = x[0];
  if (mpfr_cmp_si (p++, 0) != 0)
    {
      printf ("Error in mpfr_cmp_si macro: result should be 0.\n");
      exit (1);
    }
  if (p != x[1])
    {
      printf ("Error in mpfr_cmp_si macro: p - x[0] = %d (expecting 1)\n",
              (int) (p - x[0]));
      exit (1);
    }
  mpfr_clears (x[0], x[1], x[2], (mpfr_ptr) 0);
}

int
main (void)
{
  mpfr_t x;
  unsigned long i;
  long s;

  tests_start_mpfr ();

  mpfr_init(x);

  /* tests for cmp_ui */
  mpfr_set_ui (x, 3, MPFR_RNDZ);
  if ((mpfr_cmp_ui) (x, i = 3) != 0)
    {
      printf ("Error in mpfr_cmp_ui(3.0, 3)\n");
      exit (1);
    }
  if (mpfr_cmp_ui (x, i = 2) <= 0)
    {
      printf ("Error in mpfr_cmp_ui(3.0,2)\n");
      exit (1);
    }
  if (mpfr_cmp_ui (x, i = 4) >= 0)
    {
      printf ("Error in mpfr_cmp_ui(3.0,4)\n");
      exit (1);
    }
  mpfr_set_ui (x, 0, MPFR_RNDZ);
  mpfr_neg (x, x, MPFR_RNDZ);
  if (mpfr_cmp_ui (x, i = 0))
    {
      printf ("Error in mpfr_cmp_ui(0.0,0)\n");
      exit (1);
    }
  mpfr_set_ui (x, 1, MPFR_RNDZ);
  if (mpfr_cmp_ui (x, i = 0) == 0)
    {
      printf ("Error in mpfr_cmp_ui(1.0,0)\n");
      exit (1);
    }

  mpfr_set_inf (x, 1);
  if (mpfr_cmp_ui (x, 1) <= 0)
    {
      printf ("Error in mpfr_cmp_ui (Inf, 0)\n");
      exit (1);
    }
  mpfr_set_inf (x, -1);
  if (mpfr_cmp_ui (x, 1) >= 0)
    {
      printf ("Error in mpfr_cmp_ui (-Inf, 0)\n");
      exit (1);
    }

  mpfr_set_si (x, -1, MPFR_RNDN);
  MPFR_ASSERTN(mpfr_cmp_ui (x, 1) < 0);
  MPFR_ASSERTN(mpfr_cmp_ui (x, 0) < 0);

  mpfr_set_ui (x, 1, MPFR_RNDN);
  MPFR_ASSERTN(mpfr_cmp_ui (x, 0) > 0);

  /* tests for cmp_si */
  (mpfr_set_si) (x, -3, MPFR_RNDZ);
  if ((mpfr_cmp_si) (x, s = -3) != 0)
    {
      printf ("Error in mpfr_cmp_si(-3.0,-3)\n");
      exit (1);
    }
  if (mpfr_cmp_si (x, s = -4) <= 0)
    {
      printf ("Error in mpfr_cmp_si(-3.0,-4)\n");
      exit (1);
    }
  if (mpfr_cmp_si (x, s = 1) >= 0)
    {
      printf ("Error in mpfr_cmp_si(-3.0,1)\n");
      exit (1);
    }

  mpfr_set_inf (x, 1);
  if (mpfr_cmp_si (x, -1) <= 0)
    {
      printf ("Error in mpfr_cmp_si (Inf, 0)\n");
      exit (1);
    }
  mpfr_set_inf (x, -1);
  if (mpfr_cmp_si (x, -1) >= 0)
    {
      printf ("Error in mpfr_cmp_si (-Inf, 0)\n");
      exit (1);
    }

  /* case b=0 */
  mpfr_set_ui (x, 0, MPFR_RNDZ);
  MPFR_ASSERTN(mpfr_cmp_si (x, 0) == 0);
  MPFR_ASSERTN(mpfr_cmp_si (x, 1) < 0);
  MPFR_ASSERTN(mpfr_cmp_si (x, -1) > 0);

  /* case i=0 */
  mpfr_set_ui (x, 1, MPFR_RNDZ);
  MPFR_ASSERTN(mpfr_cmp_si (x, 0) > 0);
  mpfr_set_ui (x, 0, MPFR_RNDZ);
  MPFR_ASSERTN(mpfr_cmp_si (x, 0) == 0);
  mpfr_neg (x, x, MPFR_RNDZ);
  MPFR_ASSERTN(mpfr_cmp_si (x, 0) == 0);
  mpfr_set_si (x, -1, MPFR_RNDZ);
  MPFR_ASSERTN(mpfr_cmp_si (x, 0) < 0);

  /* case large x */
  mpfr_set_str_binary (x, "1E100");
  MPFR_ASSERTN(mpfr_cmp_si (x, 0) > 0);
  MPFR_ASSERTN(mpfr_cmp_si (x, 1) > 0);
  MPFR_ASSERTN(mpfr_cmp_si (x, -1) > 0);
  mpfr_set_str_binary (x, "-1E100");
  MPFR_ASSERTN(mpfr_cmp_si (x, 0) < 0);
  MPFR_ASSERTN(mpfr_cmp_si (x, 1) < 0);
  MPFR_ASSERTN(mpfr_cmp_si (x, -1) < 0);

  /* corner case */
  mpfr_set_ui (x, 1, MPFR_RNDZ);
  mpfr_mul_2exp (x, x, GMP_NUMB_BITS - 1, MPFR_RNDZ);
  /* now EXP(x)=GMP_NUMB_BITS */
  MPFR_ASSERTN(mpfr_cmp_si (x, 1) > 0);

  mpfr_clear (x);

  check_nan ();
  check_macros ();
  test_macros ();

  tests_end_mpfr ();
  return 0;
}

#endif
