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#include "qstringbuilder.h"

QT_BEGIN_NAMESPACE

/*!

    \class QLatin1Literal

    \internal

    \reentrant

    \since 4.6

    \brief The QLatin1Literal class provides a thin wrapper around string

    literals used in source code.

    \ingroup tools

    \ingroup shared

    \ingroup string-processing

    Unlike \c QLatin1String, a \c QLatin1Literal can retrieve its size

    without iterating over the literal.

    The main use of \c QLatin1Literal is in conjunction with \c QStringBuilder

    to reduce the number of reallocations needed to build up a string from

    smaller chunks.

    \sa QStringBuilder, QLatin1String, QString, QStringRef

*/

/*! \fn int QLatin1Literal::size() const

    Returns the number of characters in the literal \e{excluding} the trailing

    NULL char.

*/

/*! \fn QLatin1Literal::QLatin1Literal(const char str)

    Constructs a new literal from the string \a str.

*/

/*! \fn const char *QLatin1Literal::data() const

    Returns a pointer to the first character of the string literal.

    The string literal is terminated by a NUL character.

*/

/*!

    \class QStringBuilder

    \internal

    \reentrant

    \since 4.6

    \brief The QStringBuilder class is a template class that provides a facility to build up QStrings from smaller chunks.

    \ingroup tools

    \ingroup shared

    \ingroup string-processing

    To build a QString by multiple concatenations, QString::operator+()

    is typically used. This causes \e{n - 1} reallocations when building

    a string from \e{n} chunks.

    QStringBuilder uses expression templates to collect the individual

    chunks, compute the total size, allocate the required amount of

    memory for the final QString object, and copy the chunks into the

    allocated memory.

    The QStringBuilder class is not to be used explicitly in user

    code.  Instances of the class are created as return values of the

    operator%() function, acting on objects of type QString,

    QLatin1String, QLatin1Literal, QStringRef, QChar, QCharRef,

    QLatin1Char, and \c char.

    Concatenating strings with operator%() generally yields better

    performance then using \c QString::operator+() on the same chunks

    if there are three or more of them, and performs equally well in other

    cases.

    \sa QLatin1Literal, QString

*/

/*! \fn QStringBuilder::QStringBuilder(const A &a, const B &b)

  Constructs a QStringBuilder from \a a and \a b.

 */

/* \fn QStringBuilder::operator%(const A &a, const B &b)

    Returns a \c QStringBuilder object that is converted to a QString object

    when assigned to a variable of QString type or passed to a function that

    takes a QString parameter.

    This function is usable with arguments of type \c QString,

    \c QLatin1String, \c QLatin1Literal, \c QStringRef, 

    \c QChar, \c QCharRef, \c QLatin1Char, and \c char.

*/

/*! \fn QByteArray QStringBuilder::toLatin1() const

  Returns a Latin-1 representation of the string as a QByteArray.  The

  returned byte array is undefined if the string contains non-Latin1

  characters.

 */

/*! \fn QStringBuilder::operator QString() const

    Converts the \c QLatin1Literal into a \c QString object.

*/

/*! \internal */

void QAbstractConcatenable::convertFromAscii(const char *a, int len, QChar *&out)

{

#ifndef QT_NO_TEXTCODEC

    if (QString::codecForCStrings) {

        QString tmp = QString::fromAscii(a);

        memcpy(out, reinterpret_cast<const char *>(tmp.constData()), sizeof(QChar) * tmp.size());

        out += tmp.length();

        return;

    }

#endif

    if (len == -1) {

        while (*a)

            *out++ = QLatin1Char(*a++);

    } else {

        for (int i = 0; i < len - 1; ++i)

            *out++ = QLatin1Char(a[i]);

    }

}

QT_END_NAMESPACE