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# qtextcodec.h

This is the verbatim text of the qtextcodec.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id: qt/qtextcodec.h   3.3.8   edited Jan 11 14:46 $
    **
    ** Definition of QTextCodec class
    **
    ** Created : 981015
    **
    ** Copyright (C) 1998-2007 Trolltech ASA.  All rights reserved.
    **
    ** This file is part of the tools module of the Qt GUI Toolkit.
    **
    ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech ASA of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
    ** licenses may use this file in accordance with the Qt Commercial License
    ** Agreement provided with the Software.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/qpl/ for QPL licensing information.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
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    **********************************************************************/

    #ifndef QTEXTCODEC_H
    #define QTEXTCODEC_H

    #ifndef QT_H
    #include "qstring.h"
    #endif // QT_H

    #ifndef QT_NO_TEXTCODEC

    class QTextCodec;
    class QIODevice;
    class QFont;

    class Q_EXPORT QTextEncoder {
    public:
        virtual ~QTextEncoder();
        virtual QCString fromUnicode(const QString& uc, int& lenInOut) = 0;
    };

    class Q_EXPORT QTextDecoder {
    public:
        virtual ~QTextDecoder();
        virtual QString toUnicode(const char* chars, int len) = 0;
    };

    class Q_EXPORT QTextCodec {
    public:
        virtual ~QTextCodec();

    #ifndef QT_NO_CODECS
        static QTextCodec* loadCharmap(QIODevice*);
        static QTextCodec* loadCharmapFile(QString filename);
    #endif //QT_NO_CODECS
        static QTextCodec* codecForMib(int mib);
        static QTextCodec* codecForName(const char* hint, int accuracy=0);
        static QTextCodec* codecForContent(const char* chars, int len);
        static QTextCodec* codecForIndex(int i);
        static QTextCodec* codecForLocale();
        static void setCodecForLocale(QTextCodec *c);

        static QTextCodec* codecForTr();
        static void setCodecForTr(QTextCodec *c);
        static QTextCodec* codecForCStrings();
        static void setCodecForCStrings(QTextCodec *c);

        static void deleteAllCodecs();

        static const char* locale();

        virtual const char* name() const = 0;
        virtual const char* mimeName() const;
        virtual int mibEnum() const = 0;

        virtual QTextDecoder* makeDecoder() const;
        virtual QTextEncoder* makeEncoder() const;

        virtual QString toUnicode(const char* chars, int len) const;
        virtual QCString fromUnicode(const QString& uc, int& lenInOut) const;

        QCString fromUnicode(const QString& uc) const;
        QString toUnicode(const QByteArray&, int len) const;
        QString toUnicode(const QByteArray&) const;
        QString toUnicode(const QCString&, int len) const;
        QString toUnicode(const QCString&) const;
        QString toUnicode(const char* chars) const;
        virtual bool canEncode( QChar ) const;
        virtual bool canEncode( const QString& ) const;

        virtual int heuristicContentMatch(const char* chars, int len) const = 0;
        virtual int heuristicNameMatch(const char* hint) const;

        virtual QByteArray fromUnicode(const QString& uc, int from, int len) const;
        virtual unsigned short characterFromUnicode(const QString &str, int pos) const;

    protected:
        QTextCodec();
        static int simpleHeuristicNameMatch(const char* name, const char* hint);

    private:
        friend class QFont;
        friend class QFontEngineXLFD;
        void fromUnicodeInternal( const QChar *in, unsigned short *out,  int length );

        static QTextCodec *cftr;
        static QTextCodec *cfcs;
    };

    inline QTextCodec* QTextCodec::codecForTr() { return cftr; }
    inline void QTextCodec::setCodecForTr(QTextCodec *c) { cftr = c; }
    inline QTextCodec* QTextCodec::codecForCStrings() { return cfcs; }
    inline void QTextCodec::setCodecForCStrings(QTextCodec *c) { cfcs = c; }

    #endif // QT_NO_TEXTCODEC
    #endif // QTEXTCODEC_H