gecko-dev/grendel/mime/HeaderCharsetDecoder.java
1998-09-09 00:52:38 +00:00

73 lines
2.5 KiB
Java

/* -*- Mode: java; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Grendel mail/news client.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are Copyright (C) 1997
* Netscape Communications Corporation. All Rights Reserved.
*
* Created: Jamie Zawinski <jwz@netscape.com>, 7 Oct 1997.
*/
package grendel.mime;
import calypso.util.ByteBuf;
/** This class knows how to convert Unicode to and from the MIME encoding
defined in RFC 2047.
*/
class HeaderCharsetDecoder {
static HeaderCharsetDecoder decoder = null;
private HeaderCharsetDecoder() { } // only one instance
static public HeaderCharsetDecoder Get() {
if (decoder == null)
synchronized(HeaderCharsetDecoder.class) {
if (decoder == null)
decoder = new HeaderCharsetDecoder();
}
return decoder;
}
/** Converts a ByteBuf of raw header bytes to a StringBuffer of Unicode
characters, decoding the bytes as per the encoding rules of RFC 2047.
This is used by getUnicodeHeader().
@param in The raw bytes to be decoded.
@param out The resultant Unicode characters.
@param tokenizable_p Whether the header from which these bytes came
was a tokenizable header (like "From") or an
unstructured-text header (like "Subject").
This information is needed because the decoding
rules are subtly different for the two types
of headers.
*/
public void mimeToUnicode(ByteBuf in, StringBuffer out,
boolean tokenizable_p) {
// #### write me
byte inb[] = in.toBytes();
int L = in.length();
for (int i = 0; i < L; i++)
out.append((char) inb[i]);
}
public void unicodeToMime(String in, ByteBuf out, boolean tokenizable_p) {
// #### write me
out.append(in.getBytes());
}
}