BufferedInputStream.java revision fb4616d0efbba1903b9237c0a428b59868365a69
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 org.apache.harmony.luni.util.Msg; 21adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 22adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project// BEGIN android-added 23adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectimport java.util.logging.Logger; 24adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project// END android-added 25adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 26adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project/** 27adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Wraps an existing {@link InputStream} and <em>buffers</em> the input. 28adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Expensive interaction with the underlying input stream is minimized, since 29adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * most (smaller) requests can be satisfied by accessing the buffer alone. The 30adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * drawback is that some extra space is required to hold the buffer and that 31adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * copying takes place when filling that buffer, but this is usually outweighed 32adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * by the performance benefits. 33f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 34adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * <p/>A typical application pattern for the class looks like this:<p/> 35f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 36adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * <pre> 37adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * BufferedInputStream buf = new BufferedInputStream(new FileInputStream("file.java")); 38adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * </pre> 39f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 40adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @see BufferedOutputStream 41adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 42adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectpublic class BufferedInputStream extends FilterInputStream { 43adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 44adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The buffer containing the current bytes read from the target InputStream. 45adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 46adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected volatile byte[] buf; 47adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 48adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 49adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The total number of bytes inside the byte array {@code buf}. 50adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 51adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected int count; 52adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 53adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 54adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The current limit, which when passed, invalidates the current mark. 55adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 56adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected int marklimit; 57adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 58adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 59adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The currently marked position. -1 indicates no mark has been set or the 60adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * mark has been invalidated. 61adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 62adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected int markpos = -1; 63adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 64adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 65adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The current position within the byte array {@code buf}. 66adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 67adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected int pos; 68adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 69adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 70fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * Constructs a new {@code BufferedInputStream}, providing {@code in} with a buffer 71fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * of 8192 bytes. 72f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 73fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * @param in the {@code InputStream} the buffer reads from. 74adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 75adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public BufferedInputStream(InputStream in) { 76fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes this(in, 8192); 77adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 78adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 79adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 80fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * Constructs a new {@code BufferedInputStream}, providing {@code in} with {@code size} bytes 81fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * of buffer. 82f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 83fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * @param in the {@code InputStream} the buffer reads from. 84fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * @param size the size of buffer in bytes. 85fb4616d0efbba1903b9237c0a428b59868365a69Elliott Hughes * @throws IllegalArgumentException if {@code size <= 0}. 86adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 87adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public BufferedInputStream(InputStream in, int size) { 88adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project super(in); 89adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (size <= 0) { 90adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // K0058=size must be > 0 91adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new IllegalArgumentException(Msg.getString("K0058")); //$NON-NLS-1$ 92adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 93adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project buf = new byte[size]; 94adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 95adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 96adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 97adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Returns the number of bytes that are available before this stream will 98adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * block. This method returns the number of bytes available in the buffer 99adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * plus those available in the source stream. 100f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 101adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return the number of bytes available before blocking. 102adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IOException 103adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if this stream is closed. 104adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 105adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 106adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public synchronized int available() throws IOException { 107f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson InputStream localIn = in; // 'in' could be invalidated by close() 108f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (buf == null || localIn == null) { 109adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // K0059=Stream is closed 110adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new IOException(Msg.getString("K0059")); //$NON-NLS-1$ 111adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 112f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson return count - pos + localIn.available(); 113adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 114adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 115adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 116adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Closes this stream. The source stream is closed and any resources 117adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * associated with it are released. 118f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 119adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IOException 120adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if an error occurs while closing this stream. 121adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 122adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 123f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson public void close() throws IOException { 124adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project buf = null; 125f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson InputStream localIn = in; 126f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson in = null; 127f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localIn != null) { 128f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson localIn.close(); 129f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson } 130adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 131adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 132f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson private int fillbuf(InputStream localIn, byte[] localBuf) 133f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson throws IOException { 134adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (markpos == -1 || (pos - markpos >= marklimit)) { 135adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* Mark position not set or exceeded readlimit */ 136f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson int result = localIn.read(localBuf); 137adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (result > 0) { 138adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project markpos = -1; 139adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos = 0; 140adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project count = result == -1 ? 0 : result; 141adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 142adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return result; 143adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 144f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (markpos == 0 && marklimit > localBuf.length) { 145f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson /* Increase buffer size to accommodate the readlimit */ 146f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson int newLength = localBuf.length * 2; 147adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (newLength > marklimit) { 148adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project newLength = marklimit; 149adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 150adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project byte[] newbuf = new byte[newLength]; 151f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson System.arraycopy(localBuf, 0, newbuf, 0, localBuf.length); 152f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // Reassign buf, which will invalidate any local references 153f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // FIXME: what if buf was null? 154f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson localBuf = buf = newbuf; 155adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } else if (markpos > 0) { 156f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson System.arraycopy(localBuf, markpos, localBuf, 0, localBuf.length 157f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson - markpos); 158adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 159adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* Set the new position and mark position */ 160adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos -= markpos; 161adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project count = markpos = 0; 162f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson int bytesread = localIn.read(localBuf, pos, localBuf.length - pos); 163adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project count = bytesread <= 0 ? pos : pos + bytesread; 164adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return bytesread; 165adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 166adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 167adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 168adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Sets a mark position in this stream. The parameter {@code readlimit} 169adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * indicates how many bytes can be read before a mark is invalidated. 170adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Calling {@code reset()} will reposition the stream back to the marked 171adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * position if {@code readlimit} has not been surpassed. The underlying 172adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * buffer may be increased in size to allow {@code readlimit} number of 173adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * bytes to be supported. 174f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 175adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param readlimit 176adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the number of bytes that can be read before the mark is 177adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * invalidated. 178adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @see #reset() 179adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 180adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 181adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public synchronized void mark(int readlimit) { 182adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project marklimit = readlimit; 183adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project markpos = pos; 184adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 185adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 186adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 187adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Indicates whether {@code BufferedInputStream} supports the {@code mark()} 188adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * and {@code reset()} methods. 189f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 190adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return {@code true} for BufferedInputStreams. 191adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @see #mark(int) 192adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @see #reset() 193adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 194adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 195adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public boolean markSupported() { 196adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return true; 197adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 198adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 199adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 200adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Reads a single byte from this stream and returns it as an integer in the 201adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * range from 0 to 255. Returns -1 if the end of the source string has been 202adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * reached. If the internal buffer does not contain any available bytes then 203adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * it is filled from the source stream and the first byte is returned. 204f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 205adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return the byte read or -1 if the end of the source stream has been 206adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * reached. 207adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IOException 208adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if this stream is closed or another IOException occurs. 209adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 210adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 211adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public synchronized int read() throws IOException { 212f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // Use local refs since buf and in may be invalidated by an 213f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // unsynchronized close() 214f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson byte[] localBuf = buf; 215f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson InputStream localIn = in; 216f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf == null || localIn == null) { 217adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // K0059=Stream is closed 218adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new IOException(Msg.getString("K0059")); //$NON-NLS-1$ 219adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 220adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 221adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* Are there buffered bytes available? */ 222f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (pos >= count && fillbuf(localIn, localBuf) == -1) { 223adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return -1; /* no, fill buffer */ 224adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 225f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // localBuf may have been invalidated by fillbuf 226f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf != buf) { 227f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson localBuf = buf; 228f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf == null) { 229f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // K0059=Stream is closed 230f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson throw new IOException(Msg.getString("K0059")); //$NON-NLS-1$ 231f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson } 232f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson } 233adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 234adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* Did filling the buffer fail with -1 (EOF)? */ 235adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (count - pos > 0) { 236f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson return localBuf[pos++] & 0xFF; 237adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 238adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return -1; 239adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 240adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 241adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 242adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Reads at most {@code length} bytes from this stream and stores them in 243adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * byte array {@code buffer} starting at offset {@code offset}. Returns the 244adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * number of bytes actually read or -1 if no bytes were read and the end of 245adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the stream was encountered. If all the buffered bytes have been used, a 246adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * mark has not been set and the requested number of bytes is larger than 247adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the receiver's buffer size, this implementation bypasses the buffer and 248adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * simply places the results directly into {@code buffer}. 249f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 250adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param buffer 251adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the byte array in which to store the bytes read. 252adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param offset 253adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the initial position in {@code buffer} to store the bytes read 254adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * from this stream. 255adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param length 256adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the maximum number of bytes to store in {@code buffer}. 257adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return the number of bytes actually read or -1 if end of stream. 258adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IndexOutOfBoundsException 259adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if {@code offset < 0} or {@code length < 0}, or if 260adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * {@code offset + length} is greater than the size of 261adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * {@code buffer}. 262adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IOException 263adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if the stream is already closed or another IOException 264adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * occurs. 265adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 266adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 267adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public synchronized int read(byte[] buffer, int offset, int length) 268adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throws IOException { 269f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // Use local ref since buf may be invalidated by an unsynchronized 270f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // close() 271f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson byte[] localBuf = buf; 272f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf == null) { 273adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // K0059=Stream is closed 274adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new IOException(Msg.getString("K0059")); //$NON-NLS-1$ 275adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 276adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // avoid int overflow 277adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // BEGIN android-changed 278adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // Exception priorities (in case of multiple errors) differ from 279adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // RI, but are spec-compliant. 280adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // made implicit null check explicit, used (offset | length) < 0 281adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // instead of (offset < 0) || (length < 0) to safe one operation 282adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (buffer == null) { 283adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new NullPointerException(Msg.getString("K0047")); //$NON-NLS-1$ 284adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 285adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if ((offset | length) < 0 || offset > buffer.length - length) { 286adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new IndexOutOfBoundsException(Msg.getString("K002f")); //$NON-NLS-1$ 287adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 288adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // END android-changed 289adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (length == 0) { 290adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return 0; 291adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 292f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson InputStream localIn = in; 293f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localIn == null) { 294f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // K0059=Stream is closed 295adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new IOException(Msg.getString("K0059")); //$NON-NLS-1$ 296adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 297adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 298adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project int required; 299adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (pos < count) { 300adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* There are bytes available in the buffer. */ 301adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project int copylength = count - pos >= length ? length : count - pos; 302f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson System.arraycopy(localBuf, pos, buffer, offset, copylength); 303adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos += copylength; 304f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (copylength == length || localIn.available() == 0) { 305adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return copylength; 306adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 307adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project offset += copylength; 308adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project required = length - copylength; 309adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } else { 310adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project required = length; 311adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 312adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 313adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project while (true) { 314adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project int read; 315adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* 316adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * If we're not marked and the required size is greater than the 317adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * buffer, simply read the bytes directly bypassing the buffer. 318adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 319f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (markpos == -1 && required >= localBuf.length) { 320f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson read = localIn.read(buffer, offset, required); 321adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (read == -1) { 322adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return required == length ? -1 : length - required; 323adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 324adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } else { 325f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (fillbuf(localIn, localBuf) == -1) { 326adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return required == length ? -1 : length - required; 327adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 328f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // localBuf may have been invalidated by fillbuf 329f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf != buf) { 330f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson localBuf = buf; 331f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf == null) { 332f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // K0059=Stream is closed 333f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson throw new IOException(Msg.getString("K0059")); //$NON-NLS-1$ 334f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson } 335f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson } 336f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson 337adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project read = count - pos >= required ? required : count - pos; 338f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson System.arraycopy(localBuf, pos, buffer, offset, read); 339adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos += read; 340adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 341adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project required -= read; 342adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (required == 0) { 343adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return length; 344adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 345f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localIn.available() == 0) { 346adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return length - required; 347adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 348adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project offset += read; 349adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 350adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 351adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 352adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 353adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Resets this stream to the last marked location. 354f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 355adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IOException 356adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if this stream is closed, no mark has been set or the mark is 357adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * no longer valid because more than {@code readlimit} bytes 358adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * have been read since setting the mark. 359adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @see #mark(int) 360adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 361adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 362adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public synchronized void reset() throws IOException { 363adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // BEGIN android-changed 364adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* 365adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * These exceptions get thrown in some "normalish" circumstances, 366adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * so it is preferable to avoid loading up the whole big set of 367adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * messages just for these cases. 368adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 369f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (buf == null) { 370adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new IOException("Stream is closed"); 371adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 372adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (-1 == markpos) { 373adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new IOException("Mark has been invalidated."); 374adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 375adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // END android-changed 376adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos = markpos; 377adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 378adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 379adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 380adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Skips {@code amount} number of bytes in this stream. Subsequent 381adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * {@code read()}'s will not return these bytes unless {@code reset()} is 382adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * used. 383f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 384adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param amount 385adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the number of bytes to skip. {@code skip} does nothing and 386adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * returns 0 if {@code amount} is less than zero. 387adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return the number of bytes actually skipped. 388adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IOException 389adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if this stream is closed or another IOException occurs. 390adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 391adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 392adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public synchronized long skip(long amount) throws IOException { 393f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // Use local refs since buf and in may be invalidated by an 394f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // unsynchronized close() 395f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson byte[] localBuf = buf; 396f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson InputStream localIn = in; 397f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localBuf == null) { 398adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // K0059=Stream is closed 399adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new IOException(Msg.getString("K0059")); //$NON-NLS-1$ 400adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 401adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (amount < 1) { 402adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return 0; 403adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 404f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (localIn == null) { 405f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson // K0059=Stream is closed 406f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson throw new IOException(Msg.getString("K0059")); //$NON-NLS-1$ 407f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson } 408adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 409adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (count - pos >= amount) { 410adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos += amount; 411adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return amount; 412adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 413adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project long read = count - pos; 414adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos = count; 415adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 416adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (markpos != -1) { 417adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (amount <= marklimit) { 418f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (fillbuf(localIn, localBuf) == -1) { 419adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return read; 420adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 421adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (count - pos >= amount - read) { 422adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos += amount - read; 423adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return amount; 424adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 425adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // Couldn't get all the bytes, skip what we read 426adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project read += (count - pos); 427adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project pos = count; 428adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return read; 429adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 430adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 431f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson return read + localIn.skip(amount - read); 432adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 433adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project} 434