commit 5d728bb9ff8c6ad89d5a1b88b2804f954d45d763
author Jeff Brown <jeffbrown@google.com> Wed Aug 08 01:47:10 2012 -0700
committer Jeff Brown <jeffbrown@google.com> Wed Aug 08 18:23:53 2012 -0700
tree 7f81e7e2e9c71c62b9532625e28d2d97a50826e6
parent 2ab1b7d9abc1b720b63ae01abcf1df0dc780eed4

Add FloatMath.exp.

Change-Id: I7f215e5fd4cb942ddee56eebaef04be565ac79f3

api/current.txt

diff --git a/api/current.txt b/api/current.txt
index f594205..d246b09 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -22810,6 +22810,7 @@
   public class FloatMath {
     method public static float ceil(float);
     method public static float cos(float);
+    method public static float exp(float);
     method public static float floor(float);
     method public static float sin(float);
     method public static float sqrt(float);

core/java/android/util/FloatMath.java

diff --git a/core/java/android/util/FloatMath.java b/core/java/android/util/FloatMath.java
index 6216638..1d4eda4 100644
--- a/core/java/android/util/FloatMath.java
+++ b/core/java/android/util/FloatMath.java
@@ -71,4 +71,13 @@
      * @return the square root of value
      */
     public static native float sqrt(float value);
+
+    /**
+     * Returns the closest float approximation of the raising "e" to the power
+     * of the argument.
+     *
+     * @param value to compute the exponential of
+     * @return the exponential of value
+     */
+    public static native float exp(float value);
 }

core/jni/android_util_FloatMath.cpp

diff --git a/core/jni/android_util_FloatMath.cpp b/core/jni/android_util_FloatMath.cpp
index f38faa9..e30756b 100644
--- a/core/jni/android_util_FloatMath.cpp
+++ b/core/jni/android_util_FloatMath.cpp
@@ -25,6 +25,10 @@
     static float SqrtF(JNIEnv* env, jobject clazz, float x) {
         return sqrtf(x);
     }
+
+    static float ExpF(JNIEnv* env, jobject clazz, float x) {
+        return expf(x);
+    }
 };
 
 static JNINativeMethod gMathUtilsMethods[] = {
@@ -32,7 +36,8 @@
     {"ceil", "(F)F", (void*) MathUtilsGlue::CeilF},
     {"sin", "(F)F", (void*) MathUtilsGlue::SinF},
     {"cos", "(F)F", (void*) MathUtilsGlue::CosF},
-    {"sqrt", "(F)F", (void*) MathUtilsGlue::SqrtF}
+    {"sqrt", "(F)F", (void*) MathUtilsGlue::SqrtF},
+    {"exp", "(F)F", (void*) MathUtilsGlue::ExpF},
 };
 
 int register_android_util_FloatMath(JNIEnv* env)