/****************************************************************************+
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**+
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** Copyright (C) 2010 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 QtXmlPatterns module 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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#include <QtGlobal>+
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+
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#include "qbase64binary_p.h"+
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#include "qbuiltintypes_p.h"+
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#include "qpatternistlocale_p.h"+
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#include "qvalidationerror_p.h"+
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+
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#include "qhexbinary_p.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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using namespace QPatternist;+
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+
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HexBinary::HexBinary(const QByteArray &val) : Base64Binary(val)+
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{+
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}+
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+
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qint8 HexBinary::fromHex(const QChar &c)+
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{+
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    if(c.unicode() > 'f')+
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        return -1;+
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+
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    const char *const range = "0123456789ABCDEFabcdef";+
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+
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    const char *const in = strchr(range, c.unicode());+
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+
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    if(!in)+
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        return -1;+
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+
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    /* Pointer arithmetic. */+
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    int digit = in - range;+
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+
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    if(digit > 15)+
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        digit -= 6;+
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+
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    return digit;+
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}+
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+
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AtomicValue::Ptr HexBinary::fromLexical(const NamePool::Ptr &np, const QString &str)+
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{+
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    const QString lexical(str.trimmed());+
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    const int len = lexical.length();+
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+
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    if(len == 0)+
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        return AtomicValue::Ptr(new HexBinary(QByteArray()));+
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+
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    if((len & 1) != 0)+
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    {+
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        /* Catch a common case. */+
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        return ValidationError::createError(QtXmlPatterns::tr(+
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                  "A value of type %1 must contain an even number of "+
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                  "digits. The value %2 does not.")+
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                  .arg(formatType(np, BuiltinTypes::xsHexBinary),+
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                       formatData(QString::number(len))));+
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    }+
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+
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    QByteArray val;+
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    val.resize(len / 2);+
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+
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    for(int i = 0; i < len / 2; ++i)+
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    {+
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        qint8 p1 = fromHex(lexical[i * 2]);+
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        qint8 p2 = fromHex(lexical[i * 2 + 1]);+
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+
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        if(p1 == -1 || p2 == -1)+
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        {+
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            const QString hex(QString::fromLatin1("%1%2").arg(lexical[i * 2], lexical[i * 2 + 1]));+
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+
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            return ValidationError::createError(QtXmlPatterns::tr(+
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                             "%1 is not valid as a value of type %2.")+
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                             .arg(formatData(hex),+
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                                  formatType(np, BuiltinTypes::xsHexBinary)));+
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        }+
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+
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        val[i] = static_cast<char>(p1 * 16 + p2);+
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    }+
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    Q_ASSERT(!val.isEmpty());+
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+
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    return AtomicValue::Ptr(new HexBinary(val));+
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}+
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+
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HexBinary::Ptr HexBinary::fromValue(const QByteArray &data)+
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{+
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    return HexBinary::Ptr(new HexBinary(data));+
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}+
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+
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QString HexBinary::stringValue() const+
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{+
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    static const char s_toHex[] = "0123456789ABCDEF";+
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    const int len = m_value.count();+
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    QString result;+
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    result.reserve(len * 2);+
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+
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    for(int i = 0; i < len; ++i)+
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    {+
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        // This cast is significant.+
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        const unsigned char val = static_cast<unsigned char>(m_value.at(i));+
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        result += QLatin1Char(s_toHex[val >> 4]);+
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        result += QLatin1Char(s_toHex[val & 0x0F]);+
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    }+
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+
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    return result;+
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}+
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+
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ItemType::Ptr HexBinary::type() const+
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{+
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    return BuiltinTypes::xsHexBinary;+
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}+
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+
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QT_END_NAMESPACE+
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