dist/tests/tset_sj.c

/* Test file for
   mpfr_set_sj, mpfr_set_uj, mpfr_set_sj_2exp and mpfr_set_uj_2exp.

Copyright 2004, 2006, 2007, 2008, 2009, 2010, 2011 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 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 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"

#ifndef _MPFR_H_HAVE_INTMAX_T
int
main (void)
{
  return 0;
}
#else

#define ERROR(str) {printf("Error for "str"\n"); exit(1);}

static int
inexact_sign (int x)
{
  return (x < 0) ? -1 : (x > 0);
}

static void
check_set_uj (mpfr_prec_t pmin, mpfr_prec_t pmax, int N)
{
  mpfr_t x, y;
  mpfr_prec_t p;
  int inex1, inex2, n;
  mp_limb_t limb;

  mpfr_inits2 (pmax, x, y, (mpfr_ptr) 0);

  for ( p = pmin ; p < pmax ; p++)
    {
      mpfr_set_prec (x, p);
      mpfr_set_prec (y, p);
      for (n = 0 ; n < N ; n++)
        {
          /* mp_limb_t may be unsigned long long */
          limb = (unsigned long) randlimb ();
          inex1 = mpfr_set_uj (x, limb, MPFR_RNDN);
          inex2 = mpfr_set_ui (y, limb, MPFR_RNDN);
          if (mpfr_cmp (x, y))
            {
              printf ("ERROR for mpfr_set_uj and j=%lu and p=%lu\n",
                      (unsigned long) limb, p);
              printf ("X="); mpfr_dump (x);
              printf ("Y="); mpfr_dump (y);
              exit (1);
            }
          if (inexact_sign (inex1) != inexact_sign (inex2))
            {
              printf ("ERROR for inexact(set_uj): j=%lu p=%lu\n"
                      "Inexact1= %d Inexact2= %d\n",
                      (unsigned long) limb, p, inex1, inex2);
              exit (1);
            }
        }
    }
  /* Special case */
  mpfr_set_prec (x, sizeof(uintmax_t)*CHAR_BIT);
  inex1 = mpfr_set_uj (x, MPFR_UINTMAX_MAX, MPFR_RNDN);
  if (inex1 != 0 || mpfr_sgn(x) <= 0)
    ERROR ("inexact / UINTMAX_MAX");
  inex1 = mpfr_add_ui (x, x, 1, MPFR_RNDN);
  if (inex1 != 0 || !mpfr_powerof2_raw (x)
      || MPFR_EXP (x) != (sizeof(uintmax_t)*CHAR_BIT+1) )
    ERROR ("power of 2");
  mpfr_set_uj (x, 0, MPFR_RNDN);
  if (!MPFR_IS_ZERO (x))
    ERROR ("Setting 0");

  mpfr_clears (x, y, (mpfr_ptr) 0);
}

static void
check_set_uj_2exp (void)
{
  mpfr_t x;
  int inex;

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

  inex = mpfr_set_uj_2exp (x, 1, 0, MPFR_RNDN);
  if (inex || mpfr_cmp_ui(x, 1))
    ERROR("(1U,0)");

  inex = mpfr_set_uj_2exp (x, 1024, -10, MPFR_RNDN);
  if (inex || mpfr_cmp_ui(x, 1))
    ERROR("(1024U,-10)");

  inex = mpfr_set_uj_2exp (x, 1024, 10, MPFR_RNDN);
  if (inex || mpfr_cmp_ui(x, 1024L * 1024L))
    ERROR("(1024U,+10)");

  inex = mpfr_set_uj_2exp (x, MPFR_UINTMAX_MAX, 1000, MPFR_RNDN);
  inex |= mpfr_div_2ui (x, x, 1000, MPFR_RNDN);
  inex |= mpfr_add_ui (x, x, 1, MPFR_RNDN);
  if (inex || !mpfr_powerof2_raw (x)
      || MPFR_EXP (x) != (sizeof(uintmax_t)*CHAR_BIT+1) )
    ERROR("(UINTMAX_MAX)");

  inex = mpfr_set_uj_2exp (x, MPFR_UINTMAX_MAX, MPFR_EMAX_MAX-10, MPFR_RNDN);
  if (inex == 0 || !mpfr_inf_p (x))
    ERROR ("Overflow");

  inex = mpfr_set_uj_2exp (x, MPFR_UINTMAX_MAX, MPFR_EMIN_MIN-1000, MPFR_RNDN);
  if (inex == 0 || !MPFR_IS_ZERO (x))
    ERROR ("Underflow");

  mpfr_clear (x);
}

static void
check_set_sj (void)
{
  mpfr_t x;
  int inex;

  mpfr_init2 (x, sizeof(intmax_t)*CHAR_BIT-1);

  inex = mpfr_set_sj (x, -MPFR_INTMAX_MAX, MPFR_RNDN);
  inex |= mpfr_add_si (x, x, -1, MPFR_RNDN);
  if (inex || mpfr_sgn (x) >=0 || !mpfr_powerof2_raw (x)
      || MPFR_EXP (x) != (sizeof(intmax_t)*CHAR_BIT) )
    ERROR("set_sj (-INTMAX_MAX)");

  inex = mpfr_set_sj (x, 1742, MPFR_RNDN);
  if (inex || mpfr_cmp_ui (x, 1742))
    ERROR ("set_sj (1742)");

  mpfr_clear (x);
}

static void
check_set_sj_2exp (void)
{
  mpfr_t x;
  int inex;

  mpfr_init2 (x, sizeof(intmax_t)*CHAR_BIT-1);

  inex = mpfr_set_sj_2exp (x, MPFR_INTMAX_MIN, 1000, MPFR_RNDN);
  if (inex || mpfr_sgn (x) >=0 || !mpfr_powerof2_raw (x)
      || MPFR_EXP (x) != (sizeof(intmax_t)*CHAR_BIT+1000) )
    ERROR("set_sj_2exp (INTMAX_MIN)");

  mpfr_clear (x);
}

int
main (int argc, char *argv[])
{
  tests_start_mpfr ();

  check_set_uj (2, 128, 50);
  check_set_uj_2exp ();
  check_set_sj ();
  check_set_sj_2exp ();

  tests_end_mpfr ();
  return 0;
}

#endif