summaryrefslogtreecommitdiff
path: root/Build/source/libs/mpfr/mpfr-3.1.2/src/frexp.c
diff options
context:
space:
mode:
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.c56
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);
+}