1 /* CharBufferImpl.java --
2 Copyright (C) 2002, 2003 Free Software Foundation, Inc.
4 This file is part of GNU Classpath.
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING. If not, write to the
18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module. An independent module is a module which is not derived from
33 or based on this library. If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so. If you do not wish to do so, delete this
36 exception statement from your version. */
42 * This is a Heap memory implementation
44 final class CharBufferImpl extends CharBuffer
46 private boolean readOnly;
48 CharBufferImpl (int capacity)
50 this (new char [capacity], 0, capacity, capacity, 0, -1, false);
53 CharBufferImpl (char[] buffer, int offset, int capacity, int limit, int position, int mark, boolean readOnly)
55 super (capacity, limit, position, mark);
56 this.backing_buffer = buffer;
57 this.array_offset = offset;
58 this.readOnly = readOnly;
61 public CharBufferImpl (CharBufferImpl copy)
63 super (copy.capacity (), copy.limit (), copy.position (), 0);
64 backing_buffer = copy.backing_buffer;
65 readOnly = copy.isReadOnly ();
68 public boolean isReadOnly ()
73 public CharBuffer slice ()
75 return new CharBufferImpl (backing_buffer, array_offset + position (), remaining (), remaining (), 0, -1, isReadOnly ());
78 public CharBuffer duplicate ()
80 return new CharBufferImpl (backing_buffer, array_offset, capacity (), limit (), position (), mark, isReadOnly ());
83 public CharBuffer asReadOnlyBuffer ()
85 return new CharBufferImpl (backing_buffer, array_offset, capacity (), limit (), position (), mark, true);
88 public CharBuffer compact ()
92 while (remaining () > 0)
102 public boolean isDirect ()
107 final public CharSequence subSequence (int start, int end)
113 throw new IndexOutOfBoundsException ();
115 return new CharBufferImpl (backing_buffer, array_offset, capacity (), position () + end, position () + start, -1, isReadOnly ());
119 * Relative get method. Reads the next <code>char</code> from the buffer.
121 final public char get ()
123 char result = backing_buffer [position ()];
124 position (position () + 1);
129 * Relative put method. Writes <code>value</code> to the next position
132 * @exception ReadOnlyBufferException If this buffer is read-only.
134 final public CharBuffer put (char value)
137 throw new ReadOnlyBufferException ();
139 backing_buffer [position ()] = value;
140 position (position () + 1);
145 * Absolute get method. Reads the <code>char</code> at position
146 * <code>index</code>.
148 * @exception IndexOutOfBoundsException If index is negative or not smaller
149 * than the buffer's limit.
151 final public char get (int index)
154 || index >= limit ())
155 throw new IndexOutOfBoundsException ();
157 return backing_buffer [index];
161 * Absolute put method. Writes <code>value</value> to position
162 * <code>index</code> in the buffer.
164 * @exception IndexOutOfBoundsException If index is negative or not smaller
165 * than the buffer's limit.
166 * @exception ReadOnlyBufferException If this buffer is read-only.
168 final public CharBuffer put (int index, char value)
171 || index >= limit ())
172 throw new IndexOutOfBoundsException ();
175 throw new ReadOnlyBufferException ();
177 backing_buffer [index] = value;
181 final public ByteOrder order ()
183 return ByteOrder.nativeOrder ();