1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/UUDecoderStream.java Tue Mar 06 16:09:35 2012 -0800 1.3 @@ -0,0 +1,257 @@ 1.4 +/* 1.5 + * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. Oracle designates this 1.11 + * particular file as subject to the "Classpath" exception as provided 1.12 + * by Oracle in the LICENSE file that accompanied this code. 1.13 + * 1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.17 + * version 2 for more details (a copy is included in the LICENSE file that 1.18 + * accompanied this code). 1.19 + * 1.20 + * You should have received a copy of the GNU General Public License version 1.21 + * 2 along with this work; if not, write to the Free Software Foundation, 1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.23 + * 1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 1.25 + * or visit www.oracle.com if you need additional information or have any 1.26 + * questions. 1.27 + */ 1.28 + 1.29 +/* 1.30 + * @(#)UUDecoderStream.java 1.8 02/07/08 1.31 + */ 1.32 + 1.33 + 1.34 + 1.35 +package com.sun.xml.internal.messaging.saaj.packaging.mime.util; 1.36 + 1.37 +import java.io.*; 1.38 + 1.39 +/** 1.40 + * This class implements a UUDecoder. It is implemented as 1.41 + * a FilterInputStream, so one can just wrap this class around 1.42 + * any input stream and read bytes from this filter. The decoding 1.43 + * is done as the bytes are read out. 1.44 + * 1.45 + * @author John Mani 1.46 + * @author Bill Shannon 1.47 + */ 1.48 + 1.49 +public class UUDecoderStream extends FilterInputStream { 1.50 + private String name; 1.51 + private int mode; 1.52 + 1.53 + private byte[] buffer; // cache of decoded bytes 1.54 + private int bufsize = 0; // size of the cache 1.55 + private int index = 0; // index into the cache 1.56 + private boolean gotPrefix = false; 1.57 + private boolean gotEnd = false; 1.58 + private LineInputStream lin; 1.59 + 1.60 + /** 1.61 + * Create a UUdecoder that decodes the specified input stream 1.62 + * @param in the input stream 1.63 + */ 1.64 + public UUDecoderStream(InputStream in) { 1.65 + super(in); 1.66 + lin = new LineInputStream(in); 1.67 + buffer = new byte[45]; // max decoded chars in a line = 45 1.68 + } 1.69 + 1.70 + /** 1.71 + * Read the next decoded byte from this input stream. The byte 1.72 + * is returned as an <code>int</code> in the range <code>0</code> 1.73 + * to <code>255</code>. If no byte is available because the end of 1.74 + * the stream has been reached, the value <code>-1</code> is returned. 1.75 + * This method blocks until input data is available, the end of the 1.76 + * stream is detected, or an exception is thrown. 1.77 + * 1.78 + * @return next byte of data, or <code>-1</code> if the end of 1.79 + * stream is reached. 1.80 + * @exception IOException if an I/O error occurs. 1.81 + * @see java.io.FilterInputStream#in 1.82 + */ 1.83 + 1.84 + public int read() throws IOException { 1.85 + if (index >= bufsize) { 1.86 + readPrefix(); 1.87 + if (!decode()) 1.88 + return -1; 1.89 + index = 0; // reset index into buffer 1.90 + } 1.91 + return buffer[index++] & 0xff; // return lower byte 1.92 + } 1.93 + 1.94 + public int read(byte[] buf, int off, int len) throws IOException { 1.95 + int i, c; 1.96 + for (i = 0; i < len; i++) { 1.97 + if ((c = read()) == -1) { 1.98 + if (i == 0) // At end of stream, so we should 1.99 + i = -1; // return -1, NOT 0. 1.100 + break; 1.101 + } 1.102 + buf[off+i] = (byte)c; 1.103 + } 1.104 + return i; 1.105 + } 1.106 + 1.107 + public boolean markSupported() { 1.108 + return false; 1.109 + } 1.110 + 1.111 + public int available() throws IOException { 1.112 + // This is only an estimate, since in.available() 1.113 + // might include CRLFs too .. 1.114 + return ((in.available() * 3)/4 + (bufsize-index)); 1.115 + } 1.116 + 1.117 + /** 1.118 + * Get the "name" field from the prefix. This is meant to 1.119 + * be the pathname of the decoded file 1.120 + * 1.121 + * @return name of decoded file 1.122 + * @exception IOException if an I/O error occurs. 1.123 + */ 1.124 + public String getName() throws IOException { 1.125 + readPrefix(); 1.126 + return name; 1.127 + } 1.128 + 1.129 + /** 1.130 + * Get the "mode" field from the prefix. This is the permission 1.131 + * mode of the source file. 1.132 + * 1.133 + * @return permission mode of source file 1.134 + * @exception IOException if an I/O error occurs. 1.135 + */ 1.136 + public int getMode() throws IOException { 1.137 + readPrefix(); 1.138 + return mode; 1.139 + } 1.140 + 1.141 + /** 1.142 + * UUencoded streams start off with the line: 1.143 + * "begin <mode> <filename>" 1.144 + * Search for this prefix and gobble it up. 1.145 + */ 1.146 + private void readPrefix() throws IOException { 1.147 + if (gotPrefix) // got the prefix 1.148 + return; 1.149 + 1.150 + String s; 1.151 + for (;;) { 1.152 + // read till we get the prefix: "begin MODE FILENAME" 1.153 + s = lin.readLine(); // NOTE: readLine consumes CRLF pairs too 1.154 + if (s == null) 1.155 + throw new IOException("UUDecoder error: No Begin"); 1.156 + if (s.regionMatches(true, 0, "begin", 0, 5)) { 1.157 + try { 1.158 + mode = Integer.parseInt(s.substring(6,9)); 1.159 + } catch (NumberFormatException ex) { 1.160 + throw new IOException("UUDecoder error: " + ex.toString()); 1.161 + } 1.162 + name = s.substring(10); 1.163 + gotPrefix = true; 1.164 + return; 1.165 + } 1.166 + } 1.167 + } 1.168 + 1.169 + private boolean decode() throws IOException { 1.170 + 1.171 + if (gotEnd) 1.172 + return false; 1.173 + bufsize = 0; 1.174 + String line; 1.175 + do { 1.176 + line = lin.readLine(); 1.177 + 1.178 + /* 1.179 + * Improperly encoded data sometimes omits the zero length 1.180 + * line that starts with a space character, we detect the 1.181 + * following "end" line here. 1.182 + */ 1.183 + if (line == null) 1.184 + throw new IOException("Missing End"); 1.185 + if (line.regionMatches(true, 0, "end", 0, 3)) { 1.186 + gotEnd = true; 1.187 + return false; 1.188 + } 1.189 + } while (line.length() == 0); 1.190 + int count = line.charAt(0); 1.191 + if (count < ' ') 1.192 + throw new IOException("Buffer format error"); 1.193 + 1.194 + /* 1.195 + * The first character in a line is the number of original (not 1.196 + * the encoded atoms) characters in the line. Note that all the 1.197 + * code below has to handle the <SPACE> character that indicates 1.198 + * end of encoded stream. 1.199 + */ 1.200 + count = (count - ' ') & 0x3f; 1.201 + 1.202 + if (count == 0) { 1.203 + line = lin.readLine(); 1.204 + if (line == null || !line.regionMatches(true, 0, "end", 0, 3)) 1.205 + throw new IOException("Missing End"); 1.206 + gotEnd = true; 1.207 + return false; 1.208 + } 1.209 + 1.210 + int need = ((count * 8)+5)/6; 1.211 +//System.out.println("count " + count + ", need " + need + ", len " + line.length()); 1.212 + if (line.length() < need + 1) 1.213 + throw new IOException("Short buffer error"); 1.214 + 1.215 + int i = 1; 1.216 + byte a, b; 1.217 + /* 1.218 + * A correct uuencoder always encodes 3 characters at a time, even 1.219 + * if there aren't 3 characters left. But since some people out 1.220 + * there have broken uuencoders we handle the case where they 1.221 + * don't include these "unnecessary" characters. 1.222 + */ 1.223 + while (bufsize < count) { 1.224 + // continue decoding until we get 'count' decoded chars 1.225 + a = (byte)((line.charAt(i++) - ' ') & 0x3f); 1.226 + b = (byte)((line.charAt(i++) - ' ') & 0x3f); 1.227 + buffer[bufsize++] = (byte)(((a << 2) & 0xfc) | ((b >>> 4) & 3)); 1.228 + 1.229 + if (bufsize < count) { 1.230 + a = b; 1.231 + b = (byte)((line.charAt(i++) - ' ') & 0x3f); 1.232 + buffer[bufsize++] = 1.233 + (byte)(((a << 4) & 0xf0) | ((b >>> 2) & 0xf)); 1.234 + } 1.235 + 1.236 + if (bufsize < count) { 1.237 + a = b; 1.238 + b = (byte)((line.charAt(i++) - ' ') & 0x3f); 1.239 + buffer[bufsize++] = (byte)(((a << 6) & 0xc0) | (b & 0x3f)); 1.240 + } 1.241 + } 1.242 + return true; 1.243 + } 1.244 + 1.245 + /*** begin TEST program ***** 1.246 + public static void main(String argv[]) throws Exception { 1.247 + FileInputStream infile = new FileInputStream(argv[0]); 1.248 + UUDecoderStream decoder = new UUDecoderStream(infile); 1.249 + int c; 1.250 + 1.251 + try { 1.252 + while ((c = decoder.read()) != -1) 1.253 + System.out.write(c); 1.254 + System.out.flush(); 1.255 + } catch (Exception e) { 1.256 + e.printStackTrace(); 1.257 + } 1.258 + } 1.259 + **** end TEST program ****/ 1.260 +}