source: vendor/trolltech/current/src/codecs/qfonttwcodec.cpp

/****************************************************************************
** $Id: qfonttwcodec.cpp 2 2005-11-16 15:49:26Z dmik $
**
** Taiwan Font utilities for X11
**
** Created : 20010130
**
** Copyright (C) 1992-2002 Trolltech AS.  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 AS 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
** not clear to you.
**
**********************************************************************/

#include "private/qfontcodecs_p.h"

#ifndef QT_NO_CODECS
#ifndef QT_NO_BIG_CODECS

extern int qt_UnicodeToBig5hkscs(uint wc, uchar *r);


int QFontBig5Codec::heuristicContentMatch(const char *, int) const
{
    return 0;
}


int QFontBig5Codec::heuristicNameMatch(const char* hint) const
{
    //qDebug("QFontBig5Codec::heuristicNameMatch(const char* hint = \"%s\")", hint);
    return ( qstricmp(hint, "big5-0") == 0 ||
             qstricmp(hint, "big5.eten-0") == 0 )
        ? 13 : 0;
}


QFontBig5Codec::QFontBig5Codec()
{
    //qDebug("QFontBig5Codec::QFontBig5Codec()");
}


const char* QFontBig5Codec::name() const
{
    //qDebug("QFontBig5Codec::name() = \"big5-0\"");
    return "big5-0";
}


int QFontBig5Codec::mibEnum() const
{
    //qDebug("QFontBig5Codec::mibEnum() = -2026");
    return -2026;
}


QString QFontBig5Codec::toUnicode(const char* /*chars*/, int /*len*/) const
{
    return QString::null;
}

unsigned short QFontBig5Codec::characterFromUnicode(const QString &str, int pos) const
{
    uchar c[2];
    if (qt_UnicodeToBig5hkscs((str.unicode() + pos)->unicode(), c) == 2 &&
        c[0] >= 0xa1 && c[0] <= 0xf9 )
        return (c[0] << 8) + c[1];
    return 0;
}

QCString QFontBig5Codec::fromUnicode(const QString& uc, int& lenInOut ) const
{
    //qDebug("QFontBig5Codec::fromUnicode(const QString& uc, int& lenInOut = %d)", lenInOut);
    QCString result(lenInOut * 2 + 1);
    uchar *rdata = (uchar *) result.data();
    const QChar *ucp = uc.unicode();

    for ( int i = 0; i < lenInOut; i++ ) {
        QChar ch(*ucp++);
        uchar c[2];

#if 0
        if ( ch.row() == 0) {
            if ( ch.cell() == ' ' )
                ch = QChar( 0x3000 );
            else if ( ch.cell() > ' ' && ch.cell() < 127 )
                ch = QChar( ch.cell()-' ', 255 );
        }
#endif
        if ( qt_UnicodeToBig5hkscs( ch.unicode(), c ) == 2 &&
             c[0] >= 0xa1 && c[0] <= 0xf9 ) {
            *rdata++ = c[0];
            *rdata++ = c[1];
        } else {
            //white square
            *rdata++ = 0xa1;
            *rdata++ = 0xbc;
        }
    }
    lenInOut *=2;
    return result;
}

/*! \internal */
void QFontBig5Codec::fromUnicode(const QChar *in, unsigned short *out, int length) const
{
    uchar c[2];
    while (length--) {
        if ( in->row() == 0x00 && in->cell() < 0x80 ) {
            // ASCII
            *out = in->cell();
        } else if ( qt_UnicodeToBig5hkscs( in->unicode(), c ) == 2
                    && c[0] >= 0xa1 && c[0] <= 0xf9 ) {
            // Big5-ETen
            *out = (c[0] << 8) | c[1];
        } else {
            // Unknown char
            *out = 0;
        }

        ++in;
        ++out;
    }
}

bool QFontBig5Codec::canEncode( QChar ch ) const
{
    //qDebug("QFontBig5Codec::canEncode( QChar ch = %02X%02X )", ch.row(), ch.cell());
    uchar c[2];
    return ( qt_UnicodeToBig5hkscs( ch.unicode(), c ) == 2 &&
         c[0] >= 0xa1 && c[0] <= 0xf9 );
}

#endif // QT_NO_BIG_CODECS
#endif // QT_NO_CODECS