mpfr-2.4.1/tests/tfits.c

/* Test file for:
 mpfr_fits_sint_p, mpfr_fits_slong_p, mpfr_fits_sshort_p,
 mpfr_fits_uint_p, mpfr_fits_ulong_p, mpfr_fits_ushort_p

Copyright 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
Contributed by the Arenaire and Cacao 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 2.1 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.LIB.  If not, write to
the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301, USA. */

#ifdef HAVE_CONFIG_H
# include "config.h"       /* for a build within gmp */
#endif

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

/* The ISO C99 standard specifies that in C++ implementations the
   INTMAX_MAX, ... macros should only be defined if explicitly requested.  */
#if defined __cplusplus
# define __STDC_LIMIT_MACROS
# define __STDC_CONSTANT_MACROS
#endif

#if HAVE_INTTYPES_H
# include <inttypes.h> /* for intmax_t */
#else
# if HAVE_STDINT_H
#  include <stdint.h>
# endif
#endif

#include "mpfr-test.h"

#define ERROR1 { printf("Initial error for x="); mpfr_dump(x); exit(1); }
#define ERROR2 { printf("Error for x="); mpfr_dump(x); exit(1); }

static void check_intmax (void);

int
main (void)
{
  mpfr_t x;

  tests_start_mpfr ();

  mpfr_init2 (x, 256);

  /* Check NAN */
  mpfr_set_nan(x);
  if (mpfr_fits_ulong_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_slong_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_uint_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_sint_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_ushort_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_sshort_p(x, GMP_RNDN))
    ERROR1;

  /* Check INF */
  mpfr_set_inf(x, 1);
  if (mpfr_fits_ulong_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_slong_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_uint_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_sint_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_ushort_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_sshort_p(x, GMP_RNDN))
    ERROR1;

  /* Check Zero */
  MPFR_SET_ZERO(x);
  if (!mpfr_fits_ulong_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_slong_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_uint_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_sint_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_ushort_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_sshort_p(x, GMP_RNDN))
    ERROR2;

  /* Check small op */
  mpfr_set_str1 (x, "1@-1");
  if (!mpfr_fits_ulong_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_slong_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_uint_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_sint_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_ushort_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_sshort_p(x, GMP_RNDN))
    ERROR2;

  /* Check 17 */
  mpfr_set_ui (x, 17, GMP_RNDN);
  if (!mpfr_fits_ulong_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_slong_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_uint_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_sint_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_ushort_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_sshort_p(x, GMP_RNDN))
    ERROR2;

  /* Check all other values */
  mpfr_set_ui(x, ULONG_MAX, GMP_RNDN);
  mpfr_mul_2exp(x, x, 1, GMP_RNDN);
  if (mpfr_fits_ulong_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_slong_p(x, GMP_RNDN))
    ERROR1;
  mpfr_mul_2exp(x, x, 40, GMP_RNDN);
  if (mpfr_fits_ulong_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_uint_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_sint_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_ushort_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_sshort_p(x, GMP_RNDN))
    ERROR1;

  mpfr_set_ui(x, ULONG_MAX, GMP_RNDN);
  if (!mpfr_fits_ulong_p(x, GMP_RNDN))
    ERROR2;
  mpfr_set_ui(x, LONG_MAX, GMP_RNDN);
  if (!mpfr_fits_slong_p(x, GMP_RNDN))
    ERROR2;
  mpfr_set_ui(x, UINT_MAX, GMP_RNDN);
  if (!mpfr_fits_uint_p(x, GMP_RNDN))
    ERROR2;
  mpfr_set_ui(x, INT_MAX, GMP_RNDN);
  if (!mpfr_fits_sint_p(x, GMP_RNDN))
    ERROR2;
  mpfr_set_ui(x, USHRT_MAX, GMP_RNDN);
  if (!mpfr_fits_ushort_p(x, GMP_RNDN))
    ERROR2;
  mpfr_set_ui(x, SHRT_MAX, GMP_RNDN);
  if (!mpfr_fits_sshort_p(x, GMP_RNDN))
    ERROR2;

  mpfr_set_si(x, 1, GMP_RNDN);
  if (!mpfr_fits_sint_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_sshort_p(x, GMP_RNDN))
    ERROR2;

  /* Check negative value */
  mpfr_set_si (x, -1, GMP_RNDN);
  if (!mpfr_fits_sint_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_sshort_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_slong_p(x, GMP_RNDN))
    ERROR2;
  if (mpfr_fits_uint_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_ushort_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_ulong_p(x, GMP_RNDN))
    ERROR1;

  mpfr_clear (x);

  check_intmax ();

  tests_end_mpfr ();
  return 0;
}

static void check_intmax (void)
{
#ifdef _MPFR_H_HAVE_INTMAX_T
  mpfr_t x;

  mpfr_init2 (x, sizeof(uintmax_t)*CHAR_BIT);

  /* Check NAN */
  mpfr_set_nan(x);
  if (mpfr_fits_uintmax_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_intmax_p(x, GMP_RNDN))
    ERROR1;

  /* Check INF */
  mpfr_set_inf(x, 1);
  if (mpfr_fits_uintmax_p(x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_intmax_p(x, GMP_RNDN))
    ERROR1;

  /* Check Zero */
  MPFR_SET_ZERO(x);
  if (!mpfr_fits_uintmax_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_intmax_p(x, GMP_RNDN))
    ERROR2;

  /* Check small op */
  mpfr_set_str1 (x, "1@-1");
  if (!mpfr_fits_uintmax_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_intmax_p(x, GMP_RNDN))
    ERROR2;

  /* Check 17 */
  mpfr_set_ui (x, 17, GMP_RNDN);
  if (!mpfr_fits_uintmax_p(x, GMP_RNDN))
    ERROR2;
  if (!mpfr_fits_intmax_p(x, GMP_RNDN))
    ERROR2;

  /* Check hugest */
  mpfr_set_ui_2exp (x, 42, sizeof (uintmax_t) * 32, GMP_RNDN);
  if (mpfr_fits_uintmax_p (x, GMP_RNDN))
    ERROR1;
  if (mpfr_fits_intmax_p (x, GMP_RNDN))
    ERROR1;

  /* Check all other values */
  mpfr_set_uj (x, UINTMAX_MAX, GMP_RNDN);
  mpfr_add_ui (x, x, 1, GMP_RNDN);
  if (mpfr_fits_uintmax_p (x, GMP_RNDN))
    ERROR1;
  mpfr_set_uj (x, UINTMAX_MAX, GMP_RNDN);
  if (!mpfr_fits_uintmax_p (x, GMP_RNDN))
    ERROR2;
  mpfr_set_sj (x, INTMAX_MAX, GMP_RNDN);
  mpfr_add_ui (x, x, 1, GMP_RNDN);
  if (mpfr_fits_intmax_p (x, GMP_RNDN))
    ERROR1;
  mpfr_set_sj (x, INTMAX_MAX, GMP_RNDN);
  if (!mpfr_fits_intmax_p (x, GMP_RNDN))
    ERROR2;
  mpfr_set_sj (x, INTMAX_MIN, GMP_RNDN);
  if (!mpfr_fits_intmax_p (x, GMP_RNDN))
    ERROR2;
  mpfr_sub_ui (x, x, 1, GMP_RNDN);
  if (mpfr_fits_intmax_p (x, GMP_RNDN))
    ERROR1;

  /* Check negative value */
  mpfr_set_si (x, -1, GMP_RNDN);
  if (!mpfr_fits_intmax_p (x, GMP_RNDN))
    ERROR2;
  if (mpfr_fits_uintmax_p (x, GMP_RNDN))
    ERROR1;

  mpfr_clear (x);
#endif
}