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-/* CharBufferImpl.java --
- Copyright (C) 2002, 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;
-
-/**
- * This is a Heap memory implementation
- */
-final class CharBufferImpl extends CharBuffer
-{
- private final 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 (capacity, limit, position, mark, null, buffer, offset);
- this.readOnly = readOnly;
- }
-
- public CharBufferImpl (CharBufferImpl copy)
- {
- super (copy.capacity (), copy.limit (), copy.position (), 0, null, copy.backing_buffer, copy.array_offset);
- this.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 ()
- {
- checkIfReadOnly();
- mark = -1;
- int p = position();
- int n = limit() - p;
- if (n > 0)
- {
- System.arraycopy(backing_buffer, array_offset + p,
- backing_buffer, array_offset, n);
- }
- position(n);
- limit(capacity());
- return this;
- }
-
- public boolean isDirect ()
- {
- return false;
- }
-
- 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 ());
- }
-
- /**
- * 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 ()
- {
- if (pos >= limit)
- throw new BufferUnderflowException();
-
- return backing_buffer [(pos++) + array_offset];
- }
-
- /**
- * Relative put method. Writes <code>value</code> to the next position
- * in the buffer.
- *
- * @exception ReadOnlyBufferException If this buffer is read-only.
- */
- public CharBuffer put (char value)
- {
- if (readOnly)
- throw new ReadOnlyBufferException();
- if (pos >= limit)
- throw new BufferOverflowException();
-
- backing_buffer [(pos++) + array_offset] = value;
- return this;
- }
-
- /**
- * 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)
- {
- checkIndex(index);
-
- return backing_buffer [index + array_offset];
- }
-
- /**
- * Bulk get, overloaded for speed.
- */
- public CharBuffer get (char[] dst, int offset, int length)
- {
- checkArraySize(dst.length, offset, length);
- checkForUnderflow(length);
-
- System.arraycopy(backing_buffer, pos + array_offset,
- dst, offset, length);
- pos += length;
- return this;
- }
-
- /**
- * Bulk put, overloaded for speed.
- */
- public CharBuffer put (char[] src, int offset, int length)
- {
- checkArraySize(src.length, offset, length);
- checkForOverflow(length);
-
- System.arraycopy(src, offset,
- backing_buffer, pos + array_offset, length);
- pos += length;
- return this;
- }
-
- /**
- * Absolute put method. Writes <code>value</code> 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.
- */
- public CharBuffer put (int index, char value)
- {
- checkIndex(index);
- checkIfReadOnly();
-
- backing_buffer [index + array_offset] = value;
- return this;
- }
-
- public ByteOrder order ()
- {
- return ByteOrder.nativeOrder ();
- }
-}