/****************************************************************************+
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**+
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the plugins of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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// Most of the code here was originally written by Serika Kurusugawa+
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// a.k.a. Junji Takagi, and is included in Qt with the author's permission,+
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// and the grateful thanks of the Qt team.+
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+
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/*! \class QEucJpCodec+
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    \reentrant+
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    \internal+
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*/+
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+
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/*+
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 * Copyright (C) 1999 Serika Kurusugawa, All rights reserved.+
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 *+
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 * Redistribution and use in source and binary forms, with or without+
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 * modification, are permitted provided that the following conditions+
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 * are met:+
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 * 1. Redistributions of source code must retain the above copyright+
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 *    notice, this list of conditions and the following disclaimer.+
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 * 2. Redistributions in binary form must reproduce the above copyright+
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 *    notice, this list of conditions and the following disclaimer in the+
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 *    documentation and/or other materials provided with the distribution.+
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 *+
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND+
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE+
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE+
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE+
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL+
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS+
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)+
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT+
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY+
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF+
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 * SUCH DAMAGE.+
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 */+
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+
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#include "qeucjpcodec.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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#ifndef QT_NO_TEXTCODEC+
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+
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static const uchar Ss2 = 0x8e;        // Single Shift 2+
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static const uchar Ss3 = 0x8f;        // Single Shift 3+
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+
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#define        IsKana(c)        (((c) >= 0xa1) && ((c) <= 0xdf))+
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#define        IsEucChar(c)        (((c) >= 0xa1) && ((c) <= 0xfe))+
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+
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#define        QValidChar(u)        ((u) ? QChar((ushort)(u)) : QChar(QChar::ReplacementCharacter))+
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+
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/*!+
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  Constructs a QEucJpCodec.+
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*/+
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QEucJpCodec::QEucJpCodec() : conv(QJpUnicodeConv::newConverter(QJpUnicodeConv::Default))+
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{+
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}+
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+
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/*!+
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  Destroys the codec.+
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*/+
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QEucJpCodec::~QEucJpCodec()+
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{+
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    delete (QJpUnicodeConv*)conv;+
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    conv = 0;+
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}+
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+
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QByteArray QEucJpCodec::convertFromUnicode(const QChar *uc, int len, ConverterState *state) const+
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{+
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    char replacement = '?';+
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    if (state) {+
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        if (state->flags & ConvertInvalidToNull)+
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            replacement = 0;+
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    }+
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    int invalid = 0;+
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+
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    int rlen = 3*len + 1;+
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    QByteArray rstr;+
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    rstr.resize(rlen);+
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    uchar* cursor = (uchar*)rstr.data();+
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    for (int i = 0; i < len; i++) {+
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        QChar ch = uc[i];+
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        uint j;+
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        if (ch.unicode() < 0x80) {+
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            // ASCII+
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            *cursor++ = ch.cell();+
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        } else if ((j = conv->unicodeToJisx0201(ch.row(), ch.cell())) != 0) {+
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            if (j < 0x80) {+
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                // JIS X 0201 Latin ?+
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                *cursor++ = j;+
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            } else {+
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                // JIS X 0201 Kana+
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                *cursor++ = Ss2;+
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                *cursor++ = j;+
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            }+
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        } else if ((j = conv->unicodeToJisx0208(ch.row(), ch.cell())) != 0) {+
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            // JIS X 0208+
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            *cursor++ = (j >> 8)   | 0x80;+
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            *cursor++ = (j & 0xff) | 0x80;+
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        } else if ((j = conv->unicodeToJisx0212(ch.row(), ch.cell())) != 0) {+
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            // JIS X 0212+
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            *cursor++ = Ss3;+
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            *cursor++ = (j >> 8)   | 0x80;+
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            *cursor++ = (j & 0xff) | 0x80;+
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        } else {+
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            // Error+
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            *cursor++ = replacement;+
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            ++invalid;+
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        }+
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    }+
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    rstr.resize(cursor - (uchar*)rstr.constData());+
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+
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    if (state) {+
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        state->invalidChars += invalid;+
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    }+
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    return rstr;+
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}+
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+
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+
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QString QEucJpCodec::convertToUnicode(const char* chars, int len, ConverterState *state) const+
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{+
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    uchar buf[2] = {0, 0};+
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    int nbuf = 0;+
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    QChar replacement = QChar::ReplacementCharacter;+
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    if (state) {+
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        if (state->flags & ConvertInvalidToNull)+
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            replacement = QChar::Null;+
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        nbuf = state->remainingChars;+
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        buf[0] = state->state_data[0];+
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        buf[1] = state->state_data[1];+
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    }+
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    int invalid = 0;+
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+
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    QString result;+
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    for (int i=0; i<len; i++) {+
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        uchar ch = chars[i];+
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        switch (nbuf) {+
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        case 0:+
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            if (ch < 0x80) {+
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                // ASCII+
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                result += QLatin1Char(ch);+
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            } else if (ch == Ss2 || ch == Ss3) {+
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                // JIS X 0201 Kana or JIS X 0212+
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                buf[0] = ch;+
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                nbuf = 1;+
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            } else if (IsEucChar(ch)) {+
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                // JIS X 0208+
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                buf[0] = ch;+
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                nbuf = 1;+
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            } else {+
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                // Invalid+
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                result += replacement;+
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                ++invalid;+
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            }+
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            break;+
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        case 1:+
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            if (buf[0] == Ss2) {+
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                // JIS X 0201 Kana+
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                if (IsKana(ch)) {+
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                    uint u = conv->jisx0201ToUnicode(ch);+
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                    result += QValidChar(u);+
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                } else {+
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                    result += replacement;+
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                    ++invalid;+
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                }+
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                nbuf = 0;+
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            } else if (buf[0] == Ss3) {+
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                // JIS X 0212-1990+
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                if (IsEucChar(ch)) {+
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                    buf[1] = ch;+
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                    nbuf = 2;+
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                } else {+
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                    // Error+
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                    result += replacement;+
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                    ++invalid;+
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                    nbuf = 0;+
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                }+
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            } else {+
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                // JIS X 0208-1990+
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                if (IsEucChar(ch)) {+
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                    uint u = conv->jisx0208ToUnicode(buf[0] & 0x7f, ch & 0x7f);+
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                    result += QValidChar(u);+
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                } else {+
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                    // Error+
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                    result += replacement;+
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                    ++invalid;+
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                }+
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                nbuf = 0;+
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            }+
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            break;+
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        case 2:+
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            // JIS X 0212+
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            if (IsEucChar(ch)) {+
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                uint u = conv->jisx0212ToUnicode(buf[1] & 0x7f, ch & 0x7f);+
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                result += QValidChar(u);+
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            } else {+
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                result += replacement;+
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                ++invalid;+
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            }+
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            nbuf = 0;+
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        }+
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    }+
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    if (state) {+
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        state->remainingChars = nbuf;+
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        state->state_data[0] = buf[0];+
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        state->state_data[1] = buf[1];+
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        state->invalidChars += invalid;+
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    }+
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    return result;+
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}+
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+
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int QEucJpCodec::_mibEnum()+
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{+
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    return 18;+
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}+
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+
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QByteArray QEucJpCodec::_name()+
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{+
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    return "EUC-JP";+
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}+
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#endif // QT_NO_TEXTCODEC+
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+
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QT_END_NAMESPACE+
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