1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 /** 6 * Licensed to the Apache Software Foundation (ASF) under one 7 * or more contributor license agreements. See the NOTICE file 8 * distributed with this work for additional information 9 * regarding copyright ownership. The ASF licenses this file 10 * to you under the Apache License, Version 2.0 (the 11 * "License"); you may not use this file except in compliance 12 * with the License. You may obtain a copy of the License at 13 * 14 * http://www.apache.org/licenses/LICENSE-2.0 15 * 16 * Unless required by applicable law or agreed to in writing, 17 * software distributed under the License is distributed on an 18 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 19 * KIND, either express or implied. See the License for the 20 * specific language governing permissions and limitations 21 * under the License. 22 */ 23 package com.sun.org.apache.xml.internal.security.utils; 24 25 import java.io.OutputStream; 26 27 /** 28 * A simple Unsynced ByteArrayOutputStream 29 * @author raul 30 * 31 */ 32 public class UnsyncByteArrayOutputStream extends OutputStream { 33 34 private static final int INITIAL_SIZE = 8192; 35 36 private byte[] buf; 37 private int size = INITIAL_SIZE; 38 private int pos = 0; 39 40 public UnsyncByteArrayOutputStream() { 41 buf = new byte[INITIAL_SIZE]; 42 } 43 44 public void write(byte[] arg0) { 45 if ((Integer.MAX_VALUE - pos) < arg0.length) { 46 throw new OutOfMemoryError(); 47 } 48 int newPos = pos + arg0.length; 49 if (newPos > size) { 50 expandSize(newPos); 51 } 52 System.arraycopy(arg0, 0, buf, pos, arg0.length); 53 pos = newPos; 54 } 55 56 public void write(byte[] arg0, int arg1, int arg2) { 57 if ((Integer.MAX_VALUE - pos) < arg2) { 58 throw new OutOfMemoryError(); 59 } 60 int newPos = pos + arg2; 61 if (newPos > size) { 62 expandSize(newPos); 63 } 64 System.arraycopy(arg0, arg1, buf, pos, arg2); 65 pos = newPos; 66 } 67 68 public void write(int arg0) { 69 if ((Integer.MAX_VALUE - pos) == 0) { 70 throw new OutOfMemoryError(); 71 } 72 int newPos = pos + 1; 73 if (newPos > size) { 74 expandSize(newPos); 75 } 76 buf[pos++] = (byte)arg0; 77 } 78 79 public byte[] toByteArray() { 80 byte result[] = new byte[pos]; 81 System.arraycopy(buf, 0, result, 0, pos); 82 return result; 83 } 84 85 public void reset() { 86 pos = 0; 87 } 88 89 private void expandSize(int newPos) { 90 int newSize = size; 91 while (newPos > newSize) { 92 newSize = newSize << 1; 93 // Deal with overflow 94 if (newSize < 0) { 95 newSize = Integer.MAX_VALUE; 96 } 97 } 98 byte newBuf[] = new byte[newSize]; 99 System.arraycopy(buf, 0, newBuf, 0, pos); 100 buf = newBuf; 101 size = newSize; 102 } 103 }