ByteBuffer.java (endian): Make non-private so other java.nio classes can inherit it.

* java/nio/ByteBuffer.java (endian):  Make non-private so other
	java.nio classes can inherit it.
	(<init>):  Don't bother clearing array_offset.
	* java/nio/ByteBuffer.java (allocate):  Re-implement using wrap.
	* java/nio/ByteBuffer.java (get(byte[],int,int)):  Check underflow.
	Remove redundant test.

	* java/nio/ByteBufferImpl.java (asCharBuffer, asShortBuffer,
	asIntBuffer, asLongBuffer, asFloatBuffer, asDoubleBuffer):
	Use new XxxViewBufferImpl constructors.
	* java/nio/MappedByteBufferImpl.java:  Likewise.
	* java/nio/DirectByteBufferImpl.java:  Likewise.

	* java/nio/ByteBufferImpl.java:  Remove one constructor.
	Inline super in remaining constructor.
	* java/nio/ByteBuffer.java:  Remove unused constructor.

	* java/nio/ByteBufferImpl.java (shiftDown):  New optimized method.

	* java/nio/ByteBufferImpl.java (get, put):  Add array_offset.
	* java/nio/DirectByteBufferImpl.java (owner):  New field.
	(offset):  Remove unused field.
	(<init>):  Modify one and add another constructor.  Change callers.
	(allocateDirect):  Removed - not used.
	(getImpl, putImpl):  Make static and pass address explicitly,
	to make them useful for MappedByteBufferImpl.
	(get, put):  Check for underflow.  Modify for new getImpl.
	(getImpl):  New native method where target is array.
	(get(byte[],int,int)):  Use the above.
	(adjustAddress):  New static native method.
	(slice, duplicate, asReadOnly):  New implementations.
	* java/nio/natDirectByteBufferImpl.cc (getImpl, putImpl, shiftDown,
	adjustAddress):  New or updated native methods.

From-SVN: r77919

libjava/java/nio/MappedByteBufferImpl.java

@@ -144,32 +144,32 @@ public class MappedByteBufferImpl extends MappedByteBuffer
 
   public CharBuffer asCharBuffer ()
   {
-    return new CharViewBufferImpl (this, position (), remaining(), remaining (), 0, -1, isReadOnly (), order());
+    return new CharViewBufferImpl (this, remaining() >> 1);
   }
 
   public ShortBuffer asShortBuffer ()
   {
-    return new ShortViewBufferImpl (this, position (), remaining(), remaining (), 0, -1, isReadOnly (), order());
+    return new ShortViewBufferImpl (this, remaining() >> 1);
   }
 
   public IntBuffer asIntBuffer ()
   {
-    return new IntViewBufferImpl (this, position (), remaining(), remaining (), 0, -1, isReadOnly (), order());
+    return new IntViewBufferImpl (this, remaining() >> 2);
   }
-  
+
   public LongBuffer asLongBuffer ()
   {
-    return new LongViewBufferImpl (this, position (), remaining(), remaining (), 0, -1, isReadOnly (), order());
+    return new LongViewBufferImpl (this, remaining() >> 3);
   }
 
   public FloatBuffer asFloatBuffer ()
   {
-    return new FloatViewBufferImpl (this, position (), remaining(), remaining (), 0, -1, isReadOnly (), order());
+    return new FloatViewBufferImpl (this, remaining() >> 2);
   }
 
   public DoubleBuffer asDoubleBuffer ()
   {
-    return new DoubleViewBufferImpl (this, position (), remaining(), remaining (), 0, -1, isReadOnly (), order());
+    return new DoubleViewBufferImpl (this, remaining() >> 3);
   }
 
   final public char getChar ()