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| 1 | /* | ||
| 2 | * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * 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 | } | ||