libkmime

kmime_codec_uuencode.h

00001 /*  -*- c++ -*-
00002     kmime_codec_uuencode.h
00003 
00004     This file is part of KMime, the KDE internet mail/usenet news message library.
00005     Copyright (c) 2002 Marc Mutz <mutz@kde.org>
00006 
00007     KMime is free software; you can redistribute it and/or modify it
00008     under the terms of the GNU General Public License, version 2, as
00009     published by the Free Software Foundation.
00010 
00011     KMime is distributed in the hope that it will be useful, but
00012     WITHOUT ANY WARRANTY; without even the implied warranty of
00013     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014     General Public License for more details.
00015 
00016     You should have received a copy of the GNU General Public License
00017     along with this library; if not, write to the Free Software
00018     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
00019 
00020     In addition, as a special exception, the copyright holders give
00021     permission to link the code of this library with any edition of
00022     the Qt library by Trolltech AS, Norway (or with modified versions
00023     of Qt that use the same license as Qt), and distribute linked
00024     combinations including the two.  You must obey the GNU General
00025     Public License in all respects for all of the code used other than
00026     Qt.  If you modify this file, you may extend this exception to
00027     your version of the file, but you are not obligated to do so.  If
00028     you do not wish to do so, delete this exception statement from
00029     your version.
00030 */
00031 
00032 #ifndef __KMIME_CODEC_UUENCODE_H__
00033 #define __KMIME_CODEC_UUENCODE_H__
00034 
00035 #include "kmime_codecs.h"
00036 
00037 namespace KMime {
00038 
00039 class UUCodec : public Codec {
00040 protected:
00041   friend class Codec;
00042   UUCodec() : Codec() {}
00043 
00044 public:
00045   virtual ~UUCodec() {}
00046 
00047   const char * name() const {
00048     return "x-uuencode";
00049   }
00050 
00051   int maxEncodedSizeFor( int insize, bool withCRLF=false ) const {
00052     (void)withCRLF;
00053     return insize; // we have no encoder!
00054   }
00055 
00056   int maxDecodedSizeFor( int insize, bool withCRLF=false ) const {
00057     // assuming all characters are part of the uuencode stream (which
00058     // does almost never hold due to required linebreaking; but
00059     // additional non-uu chars don't affect the output size), each
00060     // 4-tupel of them becomes a 3-tupel in the decoded octet
00061     // stream. So:
00062     int result = ( ( insize + 3 ) / 4 ) * 3;
00063     // but all of them may be \n, so
00064     if ( withCRLF )
00065       result *= 2; // :-o
00066 
00067     return result;
00068   }
00069 
00070   Encoder * makeEncoder( bool withCRLF=false ) const;
00071   Decoder * makeDecoder( bool withCRLF=false ) const;
00072 };
00073 
00074 } // namespace KMime
00075 
00076 #endif // __KMIME_CODEC_UUENCODE_H__
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