#include <locale.h>
#include <QString>
#include <QStringList>
#include <QtDebug>
#include <QTextCodec>

QString hexdump(const QString &s)
{
  QStringList hex;
  const QChar *p = s.constData();
  for (int i=s.size();i;--i)
    hex.append(QString::number((p++)->unicode(),16));
  return hex.join(" ");
}

QString hexdump(const char *s)
{
  int size = strlen(s);
  QStringList hex;
  for (int i=0; i < size;++i)
    hex.append(QString::number((int)(s[i]&0xFF),16));
  return hex.join(" ");
}

int main (void) {
  setlocale(LC_ALL,"");

  char x[3] = { 0xC3, 0x9F, 0 }; // UTF-8 string
  QString X = QString::fromUtf8(x);

  qDebug() << "locale:" << QString(setlocale(LC_CTYPE,0)) << "codec:" << QTextCodec::codecForLocale()->name();
  qDebug() << "unicode:" << hexdump(X)  << "local8Bit:" << hexdump(X.toLocal8Bit().constData());
}