--- /dev/null
+/* 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;
+ }
+}
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