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#include "qcommonvalues_p.h"

#include "qpatternistlocale_p.h"

#include "qschemanumeric_p.h"

#include "qatomicstring_p.h"

#include "qtocodepointsiterator_p.h"

#include "qassemblestringfns_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

/*

 * Determines whether @p cp is a valid XML 1.0 character.

 *

 * @see <a href="http://www.w3.org/TR/REC-xml/#charsets">Extensible Markup

 * Language (XML) 1.0 (Third Edition)2.2 Characters</a>

 */

static inline bool isValidXML10Char(const qint32 cp)

{

    /* [2]     Char     ::=     #x9 | #xA | #xD | [#x20-#xD7FF] |

     *                          [#xE000-#xFFFD] | [#x10000-#x10FFFF]

     */

    return (cp == 0x9                       ||

            cp == 0xA                       ||

            cp == 0xD                       ||

            (0x20 <= cp && cp <= 0xD7FF)    ||

            (0xE000 <= cp && cp <= 0xFFFD)  ||

            (0x10000 <= cp && cp <= 0x10FFFF));

}

Item CodepointsToStringFN::evaluateSingleton(const DynamicContext::Ptr &context) const

{

    const Item::Iterator::Ptr it(m_operands.first()->evaluateSequence(context));

    if(!it)

        return CommonValues::EmptyString;

    QString retval;

    Item item(it->next());

    while(item)

    {

        const qint32 cp = static_cast<qint32>(item.as<Numeric>()->toInteger());

        if(!isValidXML10Char(cp))

        {

            context->error(QtXmlPatterns::tr("%1 is not a valid XML 1.0 character.")

                                            .arg(formatData(QLatin1String("0x") +

                                                          QString::number(cp, 16))),

                                       ReportContext::FOCH0001, this);

            return CommonValues::EmptyString;

        }

        retval.append(QChar(cp));

        item = it->next();

    }

    return AtomicString::fromValue(retval);

}

Item::Iterator::Ptr StringToCodepointsFN::evaluateSequence(const DynamicContext::Ptr &context) const

{

    const Item item(m_operands.first()->evaluateSingleton(context));

    if(!item)

        return CommonValues::emptyIterator;

    const QString str(item.stringValue());

    if(str.isEmpty())

        return CommonValues::emptyIterator;

    else

        return Item::Iterator::Ptr(new ToCodepointsIterator(str));

}

QT_END_NAMESPACE