1 /* DoubleViewBufferImpl.java --
2 Copyright (C) 2003, 2004 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. */
41 final class DoubleViewBufferImpl
extends DoubleBuffer
43 /** Position in bb (i.e. a byte offset) where this buffer starts. */
45 private ByteBuffer bb
;
46 private boolean readOnly
;
47 private ByteOrder endian
;
49 DoubleViewBufferImpl (ByteBuffer bb
, int capacity
)
51 super (capacity
, capacity
, 0, -1);
53 this.offset
= bb
.position();
54 this.readOnly
= bb
.isReadOnly();
55 this.endian
= bb
.order();
57 this.address
= VMDirectByteBuffer
.adjustAddress(bb
.address
, offset
);
60 public DoubleViewBufferImpl (ByteBuffer bb
, int offset
, int capacity
,
61 int limit
, int position
, int mark
,
62 boolean readOnly
, ByteOrder endian
)
64 super (capacity
, limit
, position
, mark
);
67 this.readOnly
= readOnly
;
70 this.address
= VMDirectByteBuffer
.adjustAddress(bb
.address
, offset
);
74 * Reads the <code>double</code> at this buffer's current position,
75 * and then increments the position.
77 * @exception BufferUnderflowException If there are no remaining
78 * <code>double</code>s in this buffer.
83 double result
= ByteBufferHelper
.getDouble(bb
, (p
<< 3) + offset
, endian
);
89 * Absolute get method. Reads the <code>double</code> at position
92 * @exception IndexOutOfBoundsException If index is negative or not smaller
93 * than the buffer's limit.
95 public double get (int index
)
97 return ByteBufferHelper
.getDouble(bb
, (index
<< 3) + offset
, endian
);
100 public DoubleBuffer
put (double value
)
103 ByteBufferHelper
.putDouble(bb
, (p
<< 3) + offset
, value
, endian
);
108 public DoubleBuffer
put (int index
, double value
)
110 ByteBufferHelper
.putDouble(bb
, (index
<< 3) + offset
, value
, endian
);
114 public DoubleBuffer
compact ()
118 int count
= limit () - position ();
119 bb
.shiftDown(offset
, offset
+ 8 * position(), 8 * count
);
131 public DoubleBuffer
slice ()
133 return new DoubleViewBufferImpl (bb
, (position () >> 3) + offset
,
134 remaining(), remaining(), 0, -1,
138 DoubleBuffer
duplicate (boolean readOnly
)
140 int pos
= position();
142 int mark
= position();
144 return new DoubleViewBufferImpl (bb
, offset
, capacity(), limit(),
145 pos
, mark
, readOnly
, endian
);
148 public DoubleBuffer
duplicate ()
150 return duplicate(readOnly
);
153 public DoubleBuffer
asReadOnlyBuffer ()
155 return duplicate(true);
158 public boolean isReadOnly ()
163 public boolean isDirect ()
165 return bb
.isDirect ();
168 public ByteOrder
order ()