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#include "qplatformdefs.h"

#include "qbytearray.h"

#include "qstring.h"

#include "string.h"

QT_BEGIN_NAMESPACE

#ifndef QT_VSNPRINTF

/*!

    \relates QByteArray

    A portable \c vsnprintf() function. Will call \c ::vsnprintf(), \c

    ::_vsnprintf(), or \c ::vsnprintf_s depending on the system, or

    fall back to an internal version.

    \a fmt is the \c printf() format string. The result is put into

    \a str, which is a buffer of at least \a n bytes.

    The caller is responsible to call \c va_end() on \a ap.

    \warning Since vsnprintf() shows different behavior on certain

    platforms, you should not rely on the return value or on the fact

    that you will always get a 0 terminated string back.

    Ideally, you should never call this function but use QString::sprintf()

    instead.

    \sa qsnprintf(), QString::sprintf()

*/

int qvsnprintf(char *str, size_t n, const char *fmt, va_list ap)

{

    if (!str || !fmt)

        return -1;

    QString buf;

    buf.vsprintf(fmt, ap);

    QByteArray ba = buf.toLocal8Bit();

    if (n > 0) {

        size_t blen = qMin(size_t(ba.length()), size_t(n - 1));

        memcpy(str, ba.constData(), blen);

        str[blen] = '\0'; // make sure str is always 0 terminated

    }

    return ba.length();

}

#else

QT_BEGIN_INCLUDE_NAMESPACE

#include <stdio.h>

QT_END_INCLUDE_NAMESPACE

int qvsnprintf(char *str, size_t n, const char *fmt, va_list ap)

{

    return QT_VSNPRINTF(str, n, fmt, ap);

}

#endif

/*!

    \relates QByteArray

    A portable snprintf() function, calls qvsnprintf.

    \a fmt is the \c printf() format string. The result is put into

    \a str, which is a buffer of at least \a n bytes.

    \warning Call this function only when you know what you are doing

    since it shows different behavior on certain platforms.

    Use QString::sprintf() to format a string instead.

    \sa qvsnprintf(), QString::sprintf()

*/

int qsnprintf(char *str, size_t n, const char *fmt, ...)

{

    va_list ap;

    va_start(ap, fmt);

    int ret = qvsnprintf(str, n, fmt, ap);

    va_end(ap);

    return ret;

}

QT_END_NAMESPACE