diff options
Diffstat (limited to 'java/com/android/voicemailomtp/src/org/apache/james/mime4j/decoder/QuotedPrintableInputStream.java')
| -rw-r--r-- | java/com/android/voicemailomtp/src/org/apache/james/mime4j/decoder/QuotedPrintableInputStream.java | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/java/com/android/voicemailomtp/src/org/apache/james/mime4j/decoder/QuotedPrintableInputStream.java b/java/com/android/voicemailomtp/src/org/apache/james/mime4j/decoder/QuotedPrintableInputStream.java deleted file mode 100644 index e43f398f9..000000000 --- a/java/com/android/voicemailomtp/src/org/apache/james/mime4j/decoder/QuotedPrintableInputStream.java +++ /dev/null @@ -1,229 +0,0 @@ -/**************************************************************** - * Licensed to the Apache Software Foundation (ASF) under one * - * or more contributor license agreements. See the NOTICE file * - * distributed with this work for additional information * - * regarding copyright ownership. The ASF licenses this file * - * to you under the Apache License, Version 2.0 (the * - * "License"); you may not use this file except in compliance * - * with the License. You may obtain a copy of the License at * - * * - * http://www.apache.org/licenses/LICENSE-2.0 * - * * - * Unless required by applicable law or agreed to in writing, * - * software distributed under the License is distributed on an * - * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * - * KIND, either express or implied. See the License for the * - * specific language governing permissions and limitations * - * under the License. * - ****************************************************************/ - -package org.apache.james.mime4j.decoder; - -import java.io.IOException; -import java.io.InputStream; - -//BEGIN android-changed: Stubbing out logging -import org.apache.james.mime4j.Log; -import org.apache.james.mime4j.LogFactory; -//END android-changed - -/** - * Performs Quoted-Printable decoding on an underlying stream. - * - * - * - * @version $Id: QuotedPrintableInputStream.java,v 1.3 2004/11/29 13:15:47 ntherning Exp $ - */ -public class QuotedPrintableInputStream extends InputStream { - private static Log log = LogFactory.getLog(QuotedPrintableInputStream.class); - - private InputStream stream; - ByteQueue byteq = new ByteQueue(); - ByteQueue pushbackq = new ByteQueue(); - private byte state = 0; - - public QuotedPrintableInputStream(InputStream stream) { - this.stream = stream; - } - - /** - * Closes the underlying stream. - * - * @throws IOException on I/O errors. - */ - public void close() throws IOException { - stream.close(); - } - - public int read() throws IOException { - fillBuffer(); - if (byteq.count() == 0) - return -1; - else { - byte val = byteq.dequeue(); - if (val >= 0) - return val; - else - return val & 0xFF; - } - } - - /** - * Pulls bytes out of the underlying stream and places them in the - * pushback queue. This is necessary (vs. reading from the - * underlying stream directly) to detect and filter out "transport - * padding" whitespace, i.e., all whitespace that appears immediately - * before a CRLF. - * - * @throws IOException Underlying stream threw IOException. - */ - private void populatePushbackQueue() throws IOException { - //Debug.verify(pushbackq.count() == 0, "PopulatePushbackQueue called when pushback queue was not empty!"); - - if (pushbackq.count() != 0) - return; - - while (true) { - int i = stream.read(); - switch (i) { - case -1: - // stream is done - pushbackq.clear(); // discard any whitespace preceding EOF - return; - case ' ': - case '\t': - pushbackq.enqueue((byte)i); - break; - case '\r': - case '\n': - pushbackq.clear(); // discard any whitespace preceding EOL - pushbackq.enqueue((byte)i); - return; - default: - pushbackq.enqueue((byte)i); - return; - } - } - } - - /** - * Causes the pushback queue to get populated if it is empty, then - * consumes and decodes bytes out of it until one or more bytes are - * in the byte queue. This decoding step performs the actual QP - * decoding. - * - * @throws IOException Underlying stream threw IOException. - */ - private void fillBuffer() throws IOException { - byte msdChar = 0; // first digit of escaped num - while (byteq.count() == 0) { - if (pushbackq.count() == 0) { - populatePushbackQueue(); - if (pushbackq.count() == 0) - return; - } - - byte b = (byte)pushbackq.dequeue(); - - switch (state) { - case 0: // start state, no bytes pending - if (b != '=') { - byteq.enqueue(b); - break; // state remains 0 - } else { - state = 1; - break; - } - case 1: // encountered "=" so far - if (b == '\r') { - state = 2; - break; - } else if ((b >= '0' && b <= '9') || (b >= 'A' && b <= 'F') || (b >= 'a' && b <= 'f')) { - state = 3; - msdChar = b; // save until next digit encountered - break; - } else if (b == '=') { - /* - * Special case when == is encountered. - * Emit one = and stay in this state. - */ - if (log.isWarnEnabled()) { - log.warn("Malformed MIME; got =="); - } - byteq.enqueue((byte)'='); - break; - } else { - if (log.isWarnEnabled()) { - log.warn("Malformed MIME; expected \\r or " - + "[0-9A-Z], got " + b); - } - state = 0; - byteq.enqueue((byte)'='); - byteq.enqueue(b); - break; - } - case 2: // encountered "=\r" so far - if (b == '\n') { - state = 0; - break; - } else { - if (log.isWarnEnabled()) { - log.warn("Malformed MIME; expected " - + (int)'\n' + ", got " + b); - } - state = 0; - byteq.enqueue((byte)'='); - byteq.enqueue((byte)'\r'); - byteq.enqueue(b); - break; - } - case 3: // encountered =<digit> so far; expecting another <digit> to complete the octet - if ((b >= '0' && b <= '9') || (b >= 'A' && b <= 'F') || (b >= 'a' && b <= 'f')) { - byte msd = asciiCharToNumericValue(msdChar); - byte low = asciiCharToNumericValue(b); - state = 0; - byteq.enqueue((byte)((msd << 4) | low)); - break; - } else { - if (log.isWarnEnabled()) { - log.warn("Malformed MIME; expected " - + "[0-9A-Z], got " + b); - } - state = 0; - byteq.enqueue((byte)'='); - byteq.enqueue(msdChar); - byteq.enqueue(b); - break; - } - default: // should never happen - log.error("Illegal state: " + state); - state = 0; - byteq.enqueue(b); - break; - } - } - } - - /** - * Converts '0' => 0, 'A' => 10, etc. - * @param c ASCII character value. - * @return Numeric value of hexadecimal character. - */ - private byte asciiCharToNumericValue(byte c) { - if (c >= '0' && c <= '9') { - return (byte)(c - '0'); - } else if (c >= 'A' && c <= 'Z') { - return (byte)(0xA + (c - 'A')); - } else if (c >= 'a' && c <= 'z') { - return (byte)(0xA + (c - 'a')); - } else { - /* - * This should never happen since all calls to this method - * are preceded by a check that c is in [0-9A-Za-z] - */ - throw new IllegalArgumentException((char) c - + " is not a hexadecimal digit"); - } - } - -} |