initial import

1 files changed, 48 insertions, 0 deletions

diff --git a/sysdeps/generic/infnan.c b/sysdeps/generic/infnan.c
new file mode 100644
index 0000000000..1102a5392d
--- /dev/null
+++ b/sysdeps/generic/infnan.c
@@ -0,0 +1,48 @@
+/* Copyright (C) 1991, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <math.h>
+
+/* Deal with an infinite or NaN result.
+   If ERROR is ERANGE, result is +Inf;
+   if ERROR is - ERANGE, result is -Inf;
+   otherwise result is NaN.
+   This will set `errno' to either ERANGE or EDOM,
+   and may return an infinity or NaN, or may do something else.  */
+double
+DEFUN(__infnan, (error), int error)
+{
+  switch (error)
+    {
+    case ERANGE:
+      errno = ERANGE;
+      return HUGE_VAL;
+
+    case - ERANGE:
+      errno = ERANGE;
+      return - HUGE_VAL;
+
+    default:
+      errno = EDOM;
+      return 0.0;
+    }
+}
+
+weak_alias (__infnan, infnan)