* header cleanup, but there is still a lot more to do...

* added round(), roundf(), and roundl() implementations.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14891 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/libroot/posix/math/Jamfile

@@ -34,6 +34,7 @@ KernelMergeObject posix_math.o :
 	log__L.c
 	math_globals.c
 	pow.c
+	round.c
 	sincos.c
 	sinh.c
 	tan.c 

src/system/libroot/posix/math/round.c

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2005, Axel Dörfler, [email protected]. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include <math.h>
+
+
+float
+roundf(float value)
+{
+	if (value >= 0.0f)
+		return floorf(value + 0.5f);
+
+	return ceilf(value + 0.5f);
+}
+
+
+double
+round(double value)
+{
+	if (value >= 0.0)
+		return floor(value + 0.5);
+
+	return ceil(value + 0.5);
+}
+
+
+long double
+roundl(long double value)
+{
+	// TODO: fix me!
+	return (long double)round((double)value);
+#if 0
+	if (value >= 0.0)
+		return floorl(value + 0.5);
+
+	return ceill(value + 0.5);
+#endif
+}
+