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-/* CharBufferImpl.java --
- Copyright (C) 2002, 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.CharBuffer;
-import java.nio.ReadOnlyBufferException;
-
-/**
- * This is a Heap memory implementation
- */
-public final class CharBufferImpl extends CharBuffer
-{
- private boolean readOnly;
-
- CharBufferImpl (int capacity)
- {
- this (new char [capacity], 0, capacity, capacity, 0, -1, false);
- }
-
- CharBufferImpl (char[] buffer, int offset, int capacity, int limit, int position, int mark, boolean readOnly)
- {
- super (buffer, offset, capacity, limit, position, mark);
- this.readOnly = readOnly;
- }
-
- public CharBufferImpl (CharBufferImpl copy)
- {
- super (copy.capacity (), copy.limit (), copy.position (), 0);
- backing_buffer = copy.backing_buffer;
- readOnly = copy.isReadOnly ();
- }
-
- public boolean isReadOnly ()
- {
- return readOnly;
- }
-
- public CharBuffer slice ()
- {
- return new CharBufferImpl (backing_buffer, array_offset + position (), remaining (), remaining (), 0, -1, isReadOnly ());
- }
-
- public CharBuffer duplicate ()
- {
- return new CharBufferImpl (backing_buffer, array_offset, capacity (), limit (), position (), mark, isReadOnly ());
- }
-
- public CharBuffer asReadOnlyBuffer ()
- {
- return new CharBufferImpl (backing_buffer, array_offset, capacity (), limit (), position (), mark, true);
- }
-
- public CharBuffer compact ()
- {
- int copied = 0;
-
- while (remaining () > 0)
- {
- put (copied, get ());
- copied++;
- }
-
- position (copied);
- return this;
- }
-
- public boolean isDirect ()
- {
- return false;
- }
-
- final public CharSequence subSequence (int start, int end)
- {
- if (start < 0
- || start > length ()
- || end < start
- || end > length ())
- throw new IndexOutOfBoundsException ();
-
- return new CharBufferImpl (backing_buffer, array_offset, capacity (), position () + end, position () + start, -1, isReadOnly ());
- }
-
- /**
- * Relative get method. Reads the next <code>char</code> from the buffer.
- */
- final public char get ()
- {
- char result = backing_buffer [position ()];
- position (position () + 1);
- return result;
- }
-
- /**
- * Relative put method. Writes <code>value</code> to the next position
- * in the buffer.
- *
- * @exception ReadOnlyBufferException If this buffer is read-only.
- */
- final public CharBuffer put (char value)
- {
- if (readOnly)
- throw new ReadOnlyBufferException ();
-
- backing_buffer [position ()] = value;
- position (position () + 1);
- return this;
- }
-
- /**
- * Absolute get method. Reads the <code>char</code> at position
- * <code>index</code>.
- *
- * @exception IndexOutOfBoundsException If index is negative or not smaller
- * than the buffer's limit.
- */
- final public char get (int index)
- {
- if (index < 0
- || index >= limit ())
- throw new IndexOutOfBoundsException ();
-
- return backing_buffer [index];
- }
-
- /**
- * Absolute put method. Writes <code>value</value> to position
- * <code>index</code> in the buffer.
- *
- * @exception IndexOutOfBoundsException If index is negative or not smaller
- * than the buffer's limit.
- * @exception ReadOnlyBufferException If this buffer is read-only.
- */
- final public CharBuffer put (int index, char value)
- {
- if (index < 0
- || index >= limit ())
- throw new IndexOutOfBoundsException ();
-
- if (readOnly)
- throw new ReadOnlyBufferException ();
-
- backing_buffer [index] = value;
- return this;
- }
-
- final public ByteOrder order ()
- {
- return ByteOrder.nativeOrder ();
- }
-}
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