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    16 ** GNU Lesser General Public License Usage

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    40 ****************************************************************************/

    41 #ifndef QMAILCODEC_H

    42 #define QMAILCODEC_H

    43 

    44 #include "qmailglobal.h"

    45 #include <QByteArray>

    46 #include <QDataStream>

    47 #include <QString>

    48 #include <QTextStream>

    49 

    50 class QTOPIAMAIL_EXPORT QMailCodec

    51 {

    52 public:

    53     enum { ChunkCharacters = 8192 };

    54 

    55     virtual ~QMailCodec();

    56 

    57     virtual QString name() const = 0;

    58 

    59     // Stream conversion interface including character translation

    60     virtual void encode(QDataStream& out, QTextStream& in, const QString& charset = "UTF-8");

    61     virtual void decode(QTextStream& out, QDataStream& in, const QString& charset);

    62 

    63     // Stream conversion interface

    64     virtual void encode(QDataStream& out, QDataStream& in);

    65     virtual void decode(QDataStream& out, QDataStream& in);

    66 

    67     // Convenience functions to encapsulate stream processing

    68     QByteArray encode(const QString& in, const QString& charset = "UTF-8");

    69     QString decode(const QByteArray& in, const QString& charset);

    70 

    71     QByteArray encode(const QByteArray& in);

    72     QByteArray decode(const QByteArray& in);

    73 

    74     // Static helper functions

    75     static void copy(QDataStream& out, QDataStream& in);

    76     static void copy(QTextStream& out, QTextStream& in);

    77 

    78 protected:

    79     // Helper functions to convert stream chunks

    80     virtual void encodeChunk(QDataStream& out, const unsigned char* in, int length, bool finalChunk) = 0;

    81     virtual void decodeChunk(QDataStream& out, const char* in, int length, bool finalChunk) = 0;

    82 };

    83 

    84 class QTOPIAMAIL_EXPORT QMailBase64Codec : public QMailCodec

    85 {

    86 public:

    87     enum ContentType { Text, Binary };

    88 

    89     QMailBase64Codec(ContentType content, int maximumLineLength = -1);

    90 

    91     virtual QString name() const;

    92 

    93 protected:

    94     virtual void encodeChunk(QDataStream& out, const unsigned char* in, int length, bool finalChunk);

    95     virtual void decodeChunk(QDataStream& out, const char* in, int length, bool finalChunk);

    96 

    97 private:

    98     ContentType _content;

    99     int _maximumLineLength;

   100 

   101     unsigned char _encodeBuffer[3];

   102     unsigned char* _encodeBufferOut;

   103     int _encodeLineCharsRemaining;

   104 

   105     unsigned char _decodeBuffer[4];

   106     unsigned char* _decodeBufferOut;

   107     int _decodePaddingCount;

   108 

   109     unsigned char _lastChar;

   110 };

   111 

   112 class QTOPIAMAIL_EXPORT QMailQuotedPrintableCodec : public QMailCodec

   113 {

   114 public:

   115     enum ContentType { Text, Binary };

   116     enum ConformanceType { Rfc2045, Rfc2047 };

   117 

   118     QMailQuotedPrintableCodec(ContentType content, ConformanceType conformance, int maximumLineLength = -1);

   119 

   120     virtual QString name() const;

   121 

   122 protected:

   123     virtual void encodeChunk(QDataStream& out, const unsigned char* in, int length, bool finalChunk);

   124     virtual void decodeChunk(QDataStream& out, const char* in, int length, bool finalChunk);

   125 

   126 private:

   127     ContentType _content;

   128     ConformanceType _conformance;

   129     int _maximumLineLength;

   130 

   131     int _encodeLineCharsRemaining;

   132     unsigned char _encodeLastChar;

   133 

   134     char _decodePrecedingInput;

   135     unsigned char _decodeLastChar;

   136 };

   137 

   138 class QTOPIAMAIL_EXPORT QMailPassThroughCodec : public QMailCodec

   139 {

   140     virtual QString name() const;

   141 

   142 protected:

   143     virtual void encodeChunk(QDataStream& out, const unsigned char* in, int length, bool finalChunk);

   144     virtual void decodeChunk(QDataStream& out, const char* in, int length, bool finalChunk);

   145 };

   146 

   147 class QTOPIAMAIL_EXPORT QMailLineEndingCodec : public QMailCodec

   148 {

   149     virtual QString name() const;

   150 

   151 public:

   152     QMailLineEndingCodec();

   153 

   154 protected:

   155     virtual void encodeChunk(QDataStream& out, const unsigned char* in, int length, bool finalChunk);

   156     virtual void decodeChunk(QDataStream& out, const char* in, int length, bool finalChunk);

   157 

   158 private:

   159     unsigned char _lastChar;

   160 };

   161 

   162 #endif