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 Wed Apr 27 01:27:09 2016 +0800
1.3 @@ -0,0 +1,257 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2012, 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 +}
