/****************************************************************************

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** This file is part of the QtXmlPatterns module of the Qt Toolkit.

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** contained in the Technology Preview License Agreement accompanying

** this package.

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****************************************************************************/

#include <QtGlobal>

#include "qbase64binary_p.h"

#include "qbuiltintypes_p.h"

#include "qpatternistlocale_p.h"

#include "qvalidationerror_p.h"

#include "qhexbinary_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

HexBinary::HexBinary(const QByteArray &val) : Base64Binary(val)

{

}

qint8 HexBinary::fromHex(const QChar &c)

{

    if(c.unicode() > 'f')

        return -1;

    const char *const range = "0123456789ABCDEFabcdef";

    const char *const in = strchr(range, c.unicode());

    if(!in)

        return -1;

    /* Pointer arithmetic. */

    int digit = in - range;

    if(digit > 15)

        digit -= 6;

    return digit;

}

AtomicValue::Ptr HexBinary::fromLexical(const NamePool::Ptr &np, const QString &str)

{

    const QString lexical(str.trimmed());

    const int len = lexical.length();

    if(len == 0)

        return AtomicValue::Ptr(new HexBinary(QByteArray()));

    if((len & 1) != 0)

    {

        /* Catch a common case. */

        return ValidationError::createError(QtXmlPatterns::tr(

                  "A value of type %1 must contain an even number of "

                  "digits. The value %2 does not.")

                  .arg(formatType(np, BuiltinTypes::xsHexBinary),

                       formatData(QString::number(len))));

    }

    QByteArray val;

    val.resize(len / 2);

    for(int i = 0; i < len / 2; ++i)

    {

        qint8 p1 = fromHex(lexical[i * 2]);

        qint8 p2 = fromHex(lexical[i * 2 + 1]);

        if(p1 == -1 || p2 == -1)

        {

            const QString hex(QString::fromLatin1("%1%2").arg(lexical[i * 2], lexical[i * 2 + 1]));

            return ValidationError::createError(QtXmlPatterns::tr(

                             "%1 is not valid as a value of type %2.")

                             .arg(formatData(hex),

                                  formatType(np, BuiltinTypes::xsHexBinary)));

        }

        val[i] = static_cast<char>(p1 * 16 + p2);

    }

    Q_ASSERT(!val.isEmpty());

    return AtomicValue::Ptr(new HexBinary(val));

}

HexBinary::Ptr HexBinary::fromValue(const QByteArray &data)

{

    return HexBinary::Ptr(new HexBinary(data));

}

QString HexBinary::stringValue() const

{

    static const char s_toHex[] = "0123456789ABCDEF";

    const int len = m_value.count();

    QString result;

    result.reserve(len * 2);

    for(int i = 0; i < len; ++i)

    {

        // This cast is significant.

        const unsigned char val = static_cast<unsigned char>(m_value.at(i));

        result += QLatin1Char(s_toHex[val >> 4]);

        result += QLatin1Char(s_toHex[val & 0x0F]);

    }

    return result;

}

ItemType::Ptr HexBinary::type() const

{

    return BuiltinTypes::xsHexBinary;

}

QT_END_NAMESPACE