1 files changed, 44 insertions, 0 deletions
diff --git a/gl/lib/modf.c b/gl/lib/modf.c
new file mode 100644
index 0000000..dc3037f
--- /dev/null
+++ b/gl/lib/modf.c
@@ -0,0 +1,44 @@
+/* Get signed integer and fractional parts of a floating-point number.
+   Copyright (C) 2012-2015 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <math.h>
+
+double
+modf (double x, double *iptr)
+{
+  if (isfinite (x))
+    {
+      double integer_part = trunc (x);
+      *iptr = integer_part;
+      return x - integer_part;
+    }
+  else
+    {
+      if (isinf (x))
+        {
+          *iptr = x;
+          return 1.0 / x;
+        }
+      else /* isnand (x) */
+        {
+          *iptr = x;
+          return x;
+        }
+    }
+}