efee5258bc
The MPFR library is a C library for multiple-precision floating-point computations with exact rounding (also called correct rounding). It is based on the GMP multiple-precision library and should replace the MPF class in further releases of GMP. GCC >= 4.2 requires MPFR.
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/* mpfr_set_sj -- set a MPFR number from a huge machine signed integer
|
|
|
|
Copyright 2004, 2005, 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
|
|
|
|
/* 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-impl.h"
|
|
|
|
#ifdef _MPFR_H_HAVE_INTMAX_T
|
|
|
|
int
|
|
mpfr_set_sj (mpfr_t x, intmax_t j, mpfr_rnd_t rnd)
|
|
{
|
|
return mpfr_set_sj_2exp (x, j, 0, rnd);
|
|
}
|
|
|
|
int
|
|
mpfr_set_sj_2exp (mpfr_t x, intmax_t j, intmax_t e, mpfr_rnd_t rnd)
|
|
{
|
|
if (j>=0)
|
|
return mpfr_set_uj_2exp (x, j, e, rnd);
|
|
else
|
|
{
|
|
int inex;
|
|
inex = mpfr_set_uj_2exp (x, - (uintmax_t) j, e, MPFR_INVERT_RND (rnd));
|
|
MPFR_CHANGE_SIGN (x);
|
|
return -inex;
|
|
}
|
|
}
|
|
|
|
#endif
|