ICU-4407 Add reset() method to RunArray.

X-SVN-Rev: 18340

icu4c/source/layoutex/layout/RunArrays.h

@@ -90,6 +90,14 @@ public:
      */
     inline le_int32 getCount() const;
 
+    /**
+     * Reset the limit indices array. This method sets the number of entries in the
+     * limit indices array to zero. It does not delete the arrays.
+     *
+     * @draft ICU 3.6
+     */
+    inline void reset();
+
     /**
      * Get the last limit index. This is the number of characters in
      * the text.
@@ -232,6 +240,11 @@ inline le_int32 RunArray::getCount() const
     return fCount;
 }
 
+inline void RunArray::reset()
+{
+    fCount = 0;
+}
+
 inline le_int32 RunArray::getLimit(le_int32 run) const
 {
     if (run < 0 || run >= fCount) {