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-/* ShortViewBufferImpl.java --
- Copyright (C) 2003 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-
-package gnu.java.nio;
-
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-import java.nio.ShortBuffer;
-
-class ShortViewBufferImpl extends ShortBuffer
-{
- private boolean readOnly;
- private int offset;
- private ByteBuffer bb;
- private ByteOrder endian;
-
- public ShortViewBufferImpl (ByteBuffer bb, boolean readOnly)
- {
- super (bb.remaining () >> 1, bb.remaining () >> 1, bb.position (), 0);
- this.bb = bb;
- this.readOnly = readOnly;
- // FIXME: What if this is called from ShortByteBufferImpl and ByteBuffer has changed its endianess ?
- this.endian = bb.order ();
- }
-
- public ShortViewBufferImpl (ByteBuffer bb, int offset, int capacity,
- int limit, int position, int mark,
- boolean readOnly)
- {
- super (limit >> 1, limit >> 1, position >> 1, mark >> 1);
- this.bb = bb;
- this.offset = offset;
- this.readOnly = readOnly;
- // FIXME: What if this is called from ShortViewBufferImpl and ByteBuffer has changed its endianess ?
- this.endian = bb.order ();
- }
-
- public short get ()
- {
- short result = bb.getShort ((position () << 1) + offset);
- position (position () + 1);
- return result;
- }
-
- public short get (int index)
- {
- return bb.getShort ((index << 1) + offset);
- }
-
- public ShortBuffer put (short value)
- {
- bb.putShort ((position () << 1) + offset, value);
- position (position () + 1);
- return this;
- }
-
- public ShortBuffer put (int index, short value)
- {
- bb.putShort ((index << 1) + offset, value);
- return this;
- }
-
- public ShortBuffer compact ()
- {
- if (position () > 0)
- {
- // Copy all data from position() to limit() to the beginning of the
- // buffer, set position to end of data and limit to capacity
- // XXX: This can surely be optimized, for direct and non-direct buffers
-
- int count = limit () - position ();
-
- for (int i = 0; i < count; i++)
- {
- bb.putShort ((i >> 1) + offset,
- bb.getShort (((i + position ()) >> 1) + offset));
- }
-
- position (count);
- limit (capacity ());
- }
-
- return this;
- }
-
- public ShortBuffer duplicate ()
- {
- // Create a copy of this object that shares its content
- // FIXME: mark is not correct
- return new ShortViewBufferImpl (bb, offset, capacity (), limit (),
- position (), -1, isReadOnly ());
- }
-
- public ShortBuffer slice ()
- {
- // Create a sliced copy of this object that shares its content.
- return new ShortViewBufferImpl (bb, (position () >> 1) + offset,
- remaining (), remaining (), 0, -1,
- isReadOnly ());
- }
-
- public ShortBuffer asReadOnlyBuffer ()
- {
- // Create a copy of this object that shares its content and is read-only
- return new ShortViewBufferImpl (bb, (position () >> 1) + offset,
- remaining (), remaining (), 0, -1, true);
- }
-
- public boolean isReadOnly ()
- {
- return readOnly;
- }
-
- public boolean isDirect ()
- {
- return bb.isDirect ();
- }
-
- public ByteOrder order ()
- {
- return ByteOrder.LITTLE_ENDIAN;
- }
-}