Author: sebb
Date: Wed Jan 19 19:26:45 2011
New Revision: 1060918
URL: http://svn.apache.org/viewvc?rev=1060918&view=rev
Log:
MATH-478 FastMath is not an exact replacement for StrictMath
Add signum(float)
Modified:
commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/FastMath.java
Modified:
commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/FastMath.java
URL:
http://svn.apache.org/viewvc/commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/FastMath.java?rev=1060918&r1=1060917&r2=1060918&view=diff
==============================================================================
---
commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/FastMath.java
(original)
+++
commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/FastMath.java
Wed Jan 19 19:26:45 2011
@@ -579,7 +579,16 @@ public class FastMath {
* @return -1, 0, +1 or NaN depending on sign of a
*/
public static double signum(final double a) {
- return (a < 0.0) ? -1.0 : ((a > 0.0) ? 1.0 : a);
+ return (a < 0.0) ? -1.0 : ((a > 0.0) ? 1.0 : a);
+ }
+
+ /** Compute the signum of a number.
+ * The signum is -1 for negative numbers, +1 for positive numbers and 0
otherwise
+ * @param a number on which evaluation is done
+ * @return -1, 0, +1 or NaN depending on sign of a
+ */
+ public static float signum(final float a) {
+ return (a < 0.0f) ? -1.0f : ((a > 0.0f) ? 1.0f : a);
}
/** Compute next number towards positive infinity.
