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 26package jdk.internal.reflect; 27 28class 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} 89