2 files changed, 22 insertions, 6 deletions
diff --git a/src/java/com/jogamp/common/util/FloatStack.java b/src/java/com/jogamp/common/util/FloatStack.java
index e5790a9..2addd76 100644
--- a/src/java/com/jogamp/common/util/FloatStack.java
+++ b/src/java/com/jogamp/common/util/FloatStack.java
@@ -63,6 +63,14 @@ public class /*name*/FloatStack/*name*/ implements PrimitiveStack {
     public final int position() { return position; }
     
     @Override
+    public final void position(int newPosition) throws IndexOutOfBoundsException {
+        if( 0 > position || position >= buffer.length ) {
+            throw new IndexOutOfBoundsException("Invalid new position "+newPosition+", "+this.toString());
+        }
+        position = newPosition; 
+    }
+    
+    @Override
     public final int remaining() { return buffer.length - position; }
     
     @Override
@@ -72,7 +80,7 @@ public class /*name*/FloatStack/*name*/ implements PrimitiveStack {
     public final void setGrowSize(int newGrowSize) { growSize = newGrowSize; }
     
     public final String toString() {
-        return "FloatStack[0..(top "+position+").."+buffer.length+", remaining "+remaining()+"]";
+        return "FloatStack[0..(pos "+position+").."+buffer.length+", remaining "+remaining()+"]";
     }
     
     public final /*value*/float/*value*/[] buffer() { return buffer; }
diff --git a/src/java/com/jogamp/common/util/PrimitiveStack.java b/src/java/com/jogamp/common/util/PrimitiveStack.java
index 23447e3..89ae72e 100644
--- a/src/java/com/jogamp/common/util/PrimitiveStack.java
+++ b/src/java/com/jogamp/common/util/PrimitiveStack.java
@@ -41,16 +41,24 @@ public interface PrimitiveStack {
     int capacity();
     
     /** 
-     * Returns the current position where the next put operation will store the next element.
+     * Returns the current position of this stack.
      * <p>
-     * The position equals to the number of elements already stored.
+     * Position is in the range: 0 &le; position &lt; {@link #capacity()}. 
      * </p>
-     * <p> 
-     * 0 denotes an empty stack.
+     * <p>
+     * The position equals to the number of elements stored.
      * </p>
      **/
     int position();
     
+    /**
+     * Sets the position of this stack.
+     * 
+     * @param newPosition the new position
+     * @throws IndexOutOfBoundsException if <code>newPosition</code> is outside of range: 0 &le; position &lt; {@link #capacity()}.
+     */
+    void position(int newPosition) throws IndexOutOfBoundsException;
+    
     /** 
      * Returns the remaining elements left before stack will grow about {@link #getGrowSize()}.
      * <pre>
@@ -68,5 +76,5 @@ public interface PrimitiveStack {
     int getGrowSize();
 
     /** Set new {@link #growSize(). */
-    void setGrowSize(int newGrowSize);
+    void setGrowSize(int newGrowSize);    
 }