/* mpfr_frexp -- convert to integral and fractional parts Copyright 2011-2015 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); /* Do not use MPFR_SET_EXP because the range has not been checked yet. */ MPFR_EXP (y) = 0; return mpfr_check_range (y, inex, rnd); }