01: /*
02: * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * by Sun in the LICENSE file that accompanied this code.
10: *
11: * This code is distributed in the hope that it will be useful, but WITHOUT
12: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14: * version 2 for more details (a copy is included in the LICENSE file that
15: * accompanied this code).
16: *
17: * You should have received a copy of the GNU General Public License version
18: * 2 along with this work; if not, write to the Free Software Foundation,
19: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20: *
21: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22: * CA 95054 USA or visit www.sun.com if you need additional information or
23: * have any questions.
24: */
25:
26: package sun.reflect;
27:
28: class ByteVectorImpl implements ByteVector {
29: private byte[] data;
30: private int pos;
31:
32: public ByteVectorImpl() {
33: this (100);
34: }
35:
36: public ByteVectorImpl(int sz) {
37: data = new byte[sz];
38: pos = -1;
39: }
40:
41: public int getLength() {
42: return pos + 1;
43: }
44:
45: public byte get(int index) {
46: if (index >= data.length) {
47: resize(index);
48: pos = index;
49: }
50: return data[index];
51: }
52:
53: public void put(int index, byte value) {
54: if (index >= data.length) {
55: resize(index);
56: pos = index;
57: }
58: data[index] = value;
59: }
60:
61: public void add(byte value) {
62: if (++pos >= data.length) {
63: resize(pos);
64: }
65: data[pos] = value;
66: }
67:
68: public void trim() {
69: if (pos != data.length - 1) {
70: byte[] newData = new byte[pos + 1];
71: System.arraycopy(data, 0, newData, 0, pos + 1);
72: data = newData;
73: }
74: }
75:
76: public byte[] getData() {
77: return data;
78: }
79:
80: private void resize(int minSize) {
81: if (minSize <= 2 * data.length) {
82: minSize = 2 * data.length;
83: }
84: byte[] newData = new byte[minSize];
85: System.arraycopy(data, 0, newData, 0, data.length);
86: data = newData;
87: }
88: }
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