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-rw-r--r--libjava/java/nio/CharViewBufferImpl.java187
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diff --git a/libjava/java/nio/CharViewBufferImpl.java b/libjava/java/nio/CharViewBufferImpl.java
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-/* CharViewBufferImpl.java --
- Copyright (C) 2003, 2004 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., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301 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 java.nio;
-
-class CharViewBufferImpl extends CharBuffer
-{
- /** Position in bb (i.e. a byte offset) where this buffer starts. */
- private int offset;
- private ByteBuffer bb;
- private boolean readOnly;
- private ByteOrder endian;
-
- CharViewBufferImpl (ByteBuffer bb, int capacity)
- {
- super (capacity, capacity, 0, -1);
- this.bb = bb;
- this.offset = bb.position();
- this.readOnly = bb.isReadOnly();
- this.endian = bb.order();
- if (bb.isDirect())
- this.address = VMDirectByteBuffer.adjustAddress(bb.address, offset);
- }
-
- public CharViewBufferImpl (ByteBuffer bb, int offset, int capacity,
- int limit, int position, int mark,
- boolean readOnly, ByteOrder endian)
- {
- super (capacity, limit, position, mark);
- this.bb = bb;
- this.offset = offset;
- this.readOnly = readOnly;
- this.endian = endian;
- if (bb.isDirect())
- this.address = VMDirectByteBuffer.adjustAddress(bb.address, offset);
- }
-
- /**
- * Reads the <code>char</code> at this buffer's current position,
- * and then increments the position.
- *
- * @exception BufferUnderflowException If there are no remaining
- * <code>char</code>s in this buffer.
- */
- public char get ()
- {
- int p = position();
- char result = ByteBufferHelper.getChar(bb, (p << 1) + offset, endian);
- position(p + 1);
- return result;
- }
-
- /**
- * Absolute get method. Reads the <code>char</code> at position
- * <code>index</code>.
- *
- * @param index Position to read the <code>char</code> from.
- *
- * @exception IndexOutOfBoundsException If index is negative or not smaller
- * than the buffer's limit.
- */
- public char get (int index)
- {
- return ByteBufferHelper.getChar(bb, (index << 1) + offset, endian);
- }
-
- public CharBuffer put (char value)
- {
- int p = position();
- ByteBufferHelper.putChar(bb, (p << 1) + offset, value, endian);
- position(p + 1);
- return this;
- }
-
- public CharBuffer put (int index, char value)
- {
- ByteBufferHelper.putChar(bb, (index << 1) + offset, value, endian);
- return this;
- }
-
- public CharBuffer compact ()
- {
- if (position () > 0)
- {
- int count = limit () - position ();
- bb.shiftDown(offset, offset + 2 * position(), 2 * count);
- position (count);
- limit (capacity ());
- }
- else
- {
- position(limit());
- limit(capacity());
- }
- return this;
- }
-
- public CharBuffer slice ()
- {
- // Create a sliced copy of this object that shares its content.
- return new CharViewBufferImpl (bb, (position () >> 1) + offset,
- remaining (), remaining (), 0, -1,
- isReadOnly (), endian);
- }
-
- CharBuffer duplicate (boolean readOnly)
- {
- int pos = position();
- reset();
- int mark = position();
- position(pos);
- return new CharViewBufferImpl (bb, offset, capacity(), limit(),
- pos, mark, readOnly, endian);
- }
-
- public CharBuffer duplicate ()
- {
- return duplicate(readOnly);
- }
-
- public CharBuffer asReadOnlyBuffer ()
- {
- return duplicate(true);
- }
-
- public CharSequence subSequence (int start, int end)
- {
- if (start < 0
- || end < start
- || end > length ())
- throw new IndexOutOfBoundsException ();
-
- return new CharViewBufferImpl (bb, array_offset, capacity (),
- position () + end, position () + start,
- -1, isReadOnly (), endian);
- }
-
- public boolean isReadOnly ()
- {
- return readOnly;
- }
-
- public boolean isDirect ()
- {
- return bb.isDirect ();
- }
-
- public ByteOrder order ()
- {
- return endian;
- }
-}