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Diffstat (limited to 'Build/source/libs/mpfr/mpfr-3.1.2/src/frexp.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-3.1.2/src/frexp.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/Build/source/libs/mpfr/mpfr-3.1.2/src/frexp.c b/Build/source/libs/mpfr/mpfr-3.1.2/src/frexp.c new file mode 100644 index 00000000000..0aea130df69 --- /dev/null +++ b/Build/source/libs/mpfr/mpfr-3.1.2/src/frexp.c @@ -0,0 +1,56 @@ +/* mpfr_frexp -- convert to integral and fractional parts + +Copyright 2011, 2012, 2013 Free Software Foundation, Inc. +Contributed by the AriC 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. */ + +#include "mpfr-impl.h" + +int +mpfr_frexp (mpfr_exp_t *exp, mpfr_ptr y, mpfr_srcptr x, mpfr_rnd_t rnd) +{ + int inex; + + if (MPFR_UNLIKELY(MPFR_IS_SINGULAR(x))) + { + if (MPFR_IS_NAN(x)) + { + MPFR_SET_NAN(y); + MPFR_RET_NAN; /* exp is unspecified */ + } + else if (MPFR_IS_INF(x)) + { + MPFR_SET_INF(y); + MPFR_SET_SAME_SIGN(y,x); + MPFR_RET(0); /* exp is unspecified */ + } + else + { + MPFR_SET_ZERO(y); + MPFR_SET_SAME_SIGN(y,x); + *exp = 0; + MPFR_RET(0); + } + } + + inex = mpfr_set (y, x, rnd); + *exp = MPFR_GET_EXP (y); + MPFR_SET_EXP (y, 0); + return mpfr_check_range (y, inex, rnd); +} |