BufferedInputStream.java revision b1396870f92135aa140bd2b86221768dea5bc11d
1adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project/* 2adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Licensed to the Apache Software Foundation (ASF) under one or more 3adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * contributor license agreements. See the NOTICE file distributed with 4adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * this work for additional information regarding copyright ownership. 5adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The ASF licenses this file to You under the Apache License, Version 2.0 6adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * (the "License"); you may not use this file except in compliance with 7adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the License. You may obtain a copy of the License at 8adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * 9adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 10adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * 11adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Unless required by applicable law or agreed to in writing, software 12adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 13adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * See the License for the specific language governing permissions and 15adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * limitations under the License. 16adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 17adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 18adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectpackage java.io; 19adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 20adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectimport java.util.logging.Logger; 21adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 22adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project/** 23adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Wraps an existing {@link InputStream} and <em>buffers</em> the input. 24adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Expensive interaction with the underlying input stream is minimized, since 25adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * most (smaller) requests can be satisfied by accessing the buffer alone. The 26adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * drawback is that some extra space is required to hold the buffer and that 27adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * copying takes place when filling that buffer, but this is usually outweighed 28adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * by the performance benefits. 29f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 30adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * <p/>A typical application pattern for the class looks like this:<p/> 31f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 32adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * <pre> 33adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * BufferedInputStream buf = new BufferedInputStream(new FileInputStream("file.java")); 34adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * </pre> 35f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 36adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @see BufferedOutputStream 37adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 38adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectpublic class BufferedInputStream extends FilterInputStream { 39adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 40adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The buffer containing the current bytes read from the target InputStream. 41adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 42adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected volatile byte[] buf; 43adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 44adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 45adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The total number of bytes inside the byte array {@code buf}. 46adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 47adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected int count; 48adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 49adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 50adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The current limit, which when passed, invalidates the current mark. 51adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 52adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected int marklimit; 53adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 54adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 55adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The currently marked position. -1 indicates no mark has been set or the 56adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * mark has been invalidated. 57adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 58adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected int markpos = -1; 59adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 60adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 61adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The current position within the byte array {@code buf}. 62adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 63adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected int pos; 64adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 65adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 66fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * Constructs a new {@code BufferedInputStream}, providing {@code in} with a buffer 67fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * of 8192 bytes. 68f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 69fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * @param in the {@code InputStream} the buffer reads from. 70adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 71adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public BufferedInputStream(InputStream in) { 72fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes this(in, 8192); 73adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 74adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 75adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 76fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * Constructs a new {@code BufferedInputStream}, providing {@code in} with {@code size} bytes 77fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * of buffer. 78f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 79fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * @param in the {@code InputStream} the buffer reads from. 80fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * @param size the size of buffer in bytes. 81fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * @throws IllegalArgumentException if {@code size <= 0}. 82adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 83adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public BufferedInputStream(InputStream in, int size) { 84adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project super(in); 85adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (size <= 0) { 86b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw new IllegalArgumentException("size <= 0"); 87adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 88adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project buf = new byte[size]; 89adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 90adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 91adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 92582d926fbf5f5fd4800def67f86ecfedee44681eElliott Hughes * Returns an estimated number of bytes that can be read or skipped without blocking for more 93582d926fbf5f5fd4800def67f86ecfedee44681eElliott Hughes * input. This method returns the number of bytes available in the buffer 94582d926fbf5f5fd4800def67f86ecfedee44681eElliott Hughes * plus those available in the source stream, but see {@link InputStream#available} for 95582d926fbf5f5fd4800def67f86ecfedee44681eElliott Hughes * important caveats. 96f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 97582d926fbf5f5fd4800def67f86ecfedee44681eElliott Hughes * @return the estimated number of bytes available 98582d926fbf5f5fd4800def67f86ecfedee44681eElliott Hughes * @throws IOException if this stream is closed or an error occurs 99adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 100adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 101adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public synchronized int available() throws IOException { 102f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson InputStream localIn = in; // 'in' could be invalidated by close() 103f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (buf == null || localIn == null) { 104b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw streamClosed(); 105adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 106f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson return count - pos + localIn.available(); 107adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 108adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 109b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes private IOException streamClosed() throws IOException { 110b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw new IOException("BufferedInputStream is closed"); 111b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes } 112b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes 113adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 114adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Closes this stream. The source stream is closed and any resources 115adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * associated with it are released. 116f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 117adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IOException 118adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if an error occurs while closing this stream. 119adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 120adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 121f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson public void close() throws IOException { 122adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project buf = null; 123f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson InputStream localIn = in; 124f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson in = null; 125f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localIn != null) { 126f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson localIn.close(); 127f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson } 128adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 129adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 130f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson private int fillbuf(InputStream localIn, byte[] localBuf) 131f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson throws IOException { 132adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (markpos == -1 || (pos - markpos >= marklimit)) { 133adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* Mark position not set or exceeded readlimit */ 134f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson int result = localIn.read(localBuf); 135adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (result > 0) { 136adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project markpos = -1; 137adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos = 0; 138adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project count = result == -1 ? 0 : result; 139adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 140adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return result; 141adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 142f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (markpos == 0 && marklimit > localBuf.length) { 143f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson /* Increase buffer size to accommodate the readlimit */ 144f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson int newLength = localBuf.length * 2; 145adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (newLength > marklimit) { 146adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project newLength = marklimit; 147adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 148adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project byte[] newbuf = new byte[newLength]; 149f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson System.arraycopy(localBuf, 0, newbuf, 0, localBuf.length); 150f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // Reassign buf, which will invalidate any local references 151f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // FIXME: what if buf was null? 152f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson localBuf = buf = newbuf; 153adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } else if (markpos > 0) { 154f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson System.arraycopy(localBuf, markpos, localBuf, 0, localBuf.length 155f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson - markpos); 156adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 157adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* Set the new position and mark position */ 158adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos -= markpos; 159adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project count = markpos = 0; 160f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson int bytesread = localIn.read(localBuf, pos, localBuf.length - pos); 161adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project count = bytesread <= 0 ? pos : pos + bytesread; 162adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return bytesread; 163adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 164adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 165adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 166adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Sets a mark position in this stream. The parameter {@code readlimit} 167adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * indicates how many bytes can be read before a mark is invalidated. 168adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Calling {@code reset()} will reposition the stream back to the marked 169adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * position if {@code readlimit} has not been surpassed. The underlying 170adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * buffer may be increased in size to allow {@code readlimit} number of 171adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * bytes to be supported. 172f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 173adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param readlimit 174adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the number of bytes that can be read before the mark is 175adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * invalidated. 176adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @see #reset() 177adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 178adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 179adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public synchronized void mark(int readlimit) { 180adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project marklimit = readlimit; 181adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project markpos = pos; 182adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 183adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 184adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 185adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Indicates whether {@code BufferedInputStream} supports the {@code mark()} 186adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * and {@code reset()} methods. 187f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 188adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return {@code true} for BufferedInputStreams. 189adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @see #mark(int) 190adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @see #reset() 191adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 192adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 193adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public boolean markSupported() { 194adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return true; 195adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 196adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 197adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 198adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Reads a single byte from this stream and returns it as an integer in the 199adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * range from 0 to 255. Returns -1 if the end of the source string has been 200adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * reached. If the internal buffer does not contain any available bytes then 201adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * it is filled from the source stream and the first byte is returned. 202f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 203adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return the byte read or -1 if the end of the source stream has been 204adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * reached. 205adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IOException 206adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if this stream is closed or another IOException occurs. 207adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 208adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 209adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public synchronized int read() throws IOException { 210f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // Use local refs since buf and in may be invalidated by an 211f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // unsynchronized close() 212f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson byte[] localBuf = buf; 213f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson InputStream localIn = in; 214f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf == null || localIn == null) { 215b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw streamClosed(); 216adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 217adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 218adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* Are there buffered bytes available? */ 219f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (pos >= count && fillbuf(localIn, localBuf) == -1) { 220adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return -1; /* no, fill buffer */ 221adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 222f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // localBuf may have been invalidated by fillbuf 223f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf != buf) { 224f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson localBuf = buf; 225f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf == null) { 226b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw streamClosed(); 227f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson } 228f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson } 229adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 230adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* Did filling the buffer fail with -1 (EOF)? */ 231adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (count - pos > 0) { 232f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson return localBuf[pos++] & 0xFF; 233adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 234adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return -1; 235adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 236adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 237adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 238adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Reads at most {@code length} bytes from this stream and stores them in 239adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * byte array {@code buffer} starting at offset {@code offset}. Returns the 240adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * number of bytes actually read or -1 if no bytes were read and the end of 241adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the stream was encountered. If all the buffered bytes have been used, a 242adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * mark has not been set and the requested number of bytes is larger than 243adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the receiver's buffer size, this implementation bypasses the buffer and 244adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * simply places the results directly into {@code buffer}. 245f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 246adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param buffer 247adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the byte array in which to store the bytes read. 248adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param offset 249adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the initial position in {@code buffer} to store the bytes read 250adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * from this stream. 251adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param length 252adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the maximum number of bytes to store in {@code buffer}. 253adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return the number of bytes actually read or -1 if end of stream. 254adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IndexOutOfBoundsException 255adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if {@code offset < 0} or {@code length < 0}, or if 256adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * {@code offset + length} is greater than the size of 257adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * {@code buffer}. 258adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IOException 259adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if the stream is already closed or another IOException 260adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * occurs. 261adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 262adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 263b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes public synchronized int read(byte[] buffer, int offset, int length) throws IOException { 264f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // Use local ref since buf may be invalidated by an unsynchronized 265f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // close() 266f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson byte[] localBuf = buf; 267f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf == null) { 268b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw streamClosed(); 269adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 270adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // avoid int overflow 271adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // BEGIN android-changed 272adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // Exception priorities (in case of multiple errors) differ from 273adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // RI, but are spec-compliant. 274adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // made implicit null check explicit, used (offset | length) < 0 275adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // instead of (offset < 0) || (length < 0) to safe one operation 276adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (buffer == null) { 277b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw new NullPointerException("buffer == null"); 278adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 279adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if ((offset | length) < 0 || offset > buffer.length - length) { 280b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw new IndexOutOfBoundsException(); 281adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 282adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // END android-changed 283adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (length == 0) { 284adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return 0; 285adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 286f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson InputStream localIn = in; 287f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localIn == null) { 288b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw streamClosed(); 289adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 290adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 291adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project int required; 292adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (pos < count) { 293adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* There are bytes available in the buffer. */ 294adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project int copylength = count - pos >= length ? length : count - pos; 295f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson System.arraycopy(localBuf, pos, buffer, offset, copylength); 296adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos += copylength; 297f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (copylength == length || localIn.available() == 0) { 298adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return copylength; 299adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 300adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project offset += copylength; 301adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project required = length - copylength; 302adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } else { 303adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project required = length; 304adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 305adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 306adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project while (true) { 307adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project int read; 308adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* 309adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * If we're not marked and the required size is greater than the 310adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * buffer, simply read the bytes directly bypassing the buffer. 311adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 312f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (markpos == -1 && required >= localBuf.length) { 313f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson read = localIn.read(buffer, offset, required); 314adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (read == -1) { 315adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return required == length ? -1 : length - required; 316adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 317adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } else { 318f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (fillbuf(localIn, localBuf) == -1) { 319adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return required == length ? -1 : length - required; 320adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 321f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // localBuf may have been invalidated by fillbuf 322f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf != buf) { 323f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson localBuf = buf; 324f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf == null) { 325b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw streamClosed(); 326f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson } 327f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson } 328f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson 329adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project read = count - pos >= required ? required : count - pos; 330f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson System.arraycopy(localBuf, pos, buffer, offset, read); 331adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos += read; 332adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 333adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project required -= read; 334adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (required == 0) { 335adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return length; 336adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 337f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localIn.available() == 0) { 338adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return length - required; 339adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 340adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project offset += read; 341adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 342adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 343adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 344adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 345adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Resets this stream to the last marked location. 346f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 347adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IOException 348adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if this stream is closed, no mark has been set or the mark is 349adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * no longer valid because more than {@code readlimit} bytes 350adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * have been read since setting the mark. 351adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @see #mark(int) 352adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 353adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 354adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public synchronized void reset() throws IOException { 355adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // BEGIN android-changed 356adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* 357adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * These exceptions get thrown in some "normalish" circumstances, 358adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * so it is preferable to avoid loading up the whole big set of 359adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * messages just for these cases. 360adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 361f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (buf == null) { 362adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new IOException("Stream is closed"); 363adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 364adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (-1 == markpos) { 365adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new IOException("Mark has been invalidated."); 366adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 367adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // END android-changed 368adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos = markpos; 369adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 370adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 371adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 372adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Skips {@code amount} number of bytes in this stream. Subsequent 373adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * {@code read()}'s will not return these bytes unless {@code reset()} is 374adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * used. 375f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 376adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param amount 377adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the number of bytes to skip. {@code skip} does nothing and 378adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * returns 0 if {@code amount} is less than zero. 379adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return the number of bytes actually skipped. 380adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IOException 381adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if this stream is closed or another IOException occurs. 382adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 383adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 384adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public synchronized long skip(long amount) throws IOException { 385f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // Use local refs since buf and in may be invalidated by an 386f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // unsynchronized close() 387f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson byte[] localBuf = buf; 388f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson InputStream localIn = in; 389f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf == null) { 390b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw streamClosed(); 391adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 392adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (amount < 1) { 393adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return 0; 394adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 395f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localIn == null) { 396b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw streamClosed(); 397f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson } 398adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 399adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (count - pos >= amount) { 400adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos += amount; 401adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return amount; 402adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 403adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project long read = count - pos; 404adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos = count; 405adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 406adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (markpos != -1) { 407adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (amount <= marklimit) { 408f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (fillbuf(localIn, localBuf) == -1) { 409adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return read; 410adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 411adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (count - pos >= amount - read) { 412adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos += amount - read; 413adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return amount; 414adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 415adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // Couldn't get all the bytes, skip what we read 416adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project read += (count - pos); 417adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos = count; 418adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return read; 419adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 420adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 421f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson return read + localIn.skip(amount - read); 422adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 423adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project} 424