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diff --git a/LGPL_EXCEPTION.txt b/LGPL_EXCEPTION.txt
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--- /dev/null
+++ b/LGPL_EXCEPTION.txt
@@ -0,0 +1,22 @@
+Nokia Qt LGPL Exception version 1.1
+
+As an additional permission to the GNU Lesser General Public License version
+2.1, the object code form of a "work that uses the Library" may incorporate
+material from a header file that is part of the Library.  You may distribute
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+    (i)   the header files of the Library have not been modified; and 
+    (ii)  the incorporated material is limited to numerical parameters, data
+          structure layouts, accessors, macros, inline functions and
+          templates; and
+    (iii) you comply with the terms of Section 6 of the GNU Lesser General
+          Public License version 2.1.
+
+Moreover, you may apply this exception to a modified version of the Library,
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+Library into the modified Library's header files unless such material is
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+
+Furthermore, you are not required to apply this additional permission to a
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diff --git a/LICENSE.GPL b/LICENSE.GPL
new file mode 100644
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--- /dev/null
+++ b/LICENSE.GPL
@@ -0,0 +1,696 @@
+                    GNU GENERAL PUBLIC LICENSE
+
+ The Qt GUI Toolkit is Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ Contact: Nokia Corporation (qt-info@nokia.com)
+
+ You may use, distribute and copy the Qt GUI Toolkit under the terms of
+ GNU General Public License version 3, which is displayed below.
+
+-------------------------------------------------------------------------
+
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diff --git a/LICENSE.LGPL b/LICENSE.LGPL
new file mode 100644
index 0000000..a0e8eb8
--- /dev/null
+++ b/LICENSE.LGPL
@@ -0,0 +1,514 @@
+		  GNU LESSER GENERAL PUBLIC LICENSE
+
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+ Contact: Nokia Corporation (qt-info@nokia.com)
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+-------------------------------------------------------------------------
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+CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
+LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
+RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
+FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+           How to Apply These Terms to Your New Libraries
+
+  If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change.  You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+  To apply these terms, attach the following notices to the library.  It is
+safest to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the library's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
+  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+  <signature of Ty Coon>, 1 April 1990
+  Ty Coon, President of Vice
+
+That's all there is to it!
+
+
diff --git a/benchmark/castellano.txt b/benchmark/castellano.txt
new file mode 100644
index 0000000..680da45
--- /dev/null
+++ b/benchmark/castellano.txt
@@ -0,0 +1,18 @@
+En un lugar de la Mancha, de cuyo nombre no quiero acordarme, no ha mucho 
+tiempo que vivía un hidalgo de los de lanza en astillero adarga antigua, rocín 
+flaco y galgo corredor. Una olla de algo más vaca que carnero, salpicón las 
+más noches, duelos y quebrantos los sábados, lantejas los viernes, algún 
+palomino de añadidura los domingos, consumían las tres partes de su hacienda. 
+El resto della concluían sayo de velarte, calzas de velludo para las fiestas, 
+con sus pantuflos de lo mesmo, y los días de entresemana se honraba con su 
+vellorí de lo más fino.
+
+Tenía en su casa una ama que pasaba de los cuarenta, y una sobrina que no 
+llegaba a los veinte, y un mozo de campo y plaza, que así ensillaba el rocín 
+como tomaba la podadera. Frisaba la edad de nuestro hidalgo con los cincuenta 
+años; era de complexión recia, seco de carnes, enjuto de rostro, gran 
+madrugador y amigo de la caza. Quieren decir que tenía el sobrenombre de 
+Quijada, o Quesada, que en esto hay alguna diferencia en los autores que deste 
+caso escriben; aunque, por conjeturas verosímiles, se deja entender que se 
+llamaba Quejana. Pero esto importa poco a nuestro cuento; basta que en la 
+narración dél no se salga un punto de la verdad.
diff --git a/benchmark/chilean.txt b/benchmark/chilean.txt
new file mode 100644
index 0000000..13cb2f4
--- /dev/null
+++ b/benchmark/chilean.txt
@@ -0,0 +1,50 @@
+POEMA 20
+
+Puedo escribir los versos más tristes esta noche.
+
+Escribir, por ejemplo: «La noche está estrellada,
+y tiritan, azules, los astros, a lo lejos».
+
+El viento de la noche gira en el cielo y canta.
+
+Puedo escribir los versos más tristes esta noche.
+Yo la quise, y a veces ella también me quiso.
+
+En las noches como ésta la tuve entre mis brazos.
+La besé tantas veces bajo el cielo infinito.
+
+Ella me quiso, a veces yo también la quería.
+Cómo no haber amado sus grandes ojos fijos.
+
+Puedo escribir los versos más tristes esta noche.
+Pensar que no la tengo. Sentir que la he perdido.
+
+Oír la noche inmensa, más inmensa sin ella.
+Y el verso cae al alma como al pasto el rocío.
+
+Qué importa que mi amor no pudiera guardarla.
+La noche está estrellada y ella no está conmigo.
+
+Eso es todo. A lo lejos alguien canta. A lo lejos.
+Mi alma no se contenta con haberla perdido.
+
+Como para acercarla mi mirada la busca.
+Mi corazón la busca, y ella no está conmigo.
+
+La misma noche que hace blanquear los mismos árboles.
+Nosotros, los de entonces, ya no somos los mismos.
+
+Ya no la quiero, es cierto, pero cuánto la quise.
+Mi voz buscaba el viento para tocar su oído.
+
+De otro. Será de otro. Como antes de mis besos.
+Su voz, su cuerpo claro. Sus ojos infinitos.
+
+Ya no la quiero, es cierto, pero tal vez la quiero.
+Es tan corto el amor, y es tan largo el olvido.
+
+Porque en noches como ésta la tuve entre mis brazos,
+Mi alma no se contenta con haberla perdido.
+
+Aunque éste sea el último dolor que ella me causa,
+y éstos sean los últimos versos que yo le escribo.
diff --git a/benchmark/main.cpp b/benchmark/main.cpp
new file mode 100644
index 0000000..3a05abb
--- /dev/null
+++ b/benchmark/main.cpp
@@ -0,0 +1,157 @@
+/** This file is part of QtCollator **
+
+Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).*
+
+Contact:  Nokia Corporation (info@qt.nokia.com)**
+
+GNU Lesser General Public License Usage
+This file may be used under the terms of the GNU Lesser General Public License
+version 2.1 as published by the Free Software Foundation and appearing in the
+file LICENSE.LGPL included in the packaging of this file. Please review the
+following information to ensure the GNU Lesser General Public License version
+2.1 requirements will be met:
+http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+
+In addition, as a special exception, Nokia gives you certain additional rights.
+These rights are described in the Nokia Qt LGPL Exception version 1.1, included
+in the file LGPL_EXCEPTION.txt in this package.
+
+GNU General Public License Usage
+Alternatively, this file may be used under the terms of the GNU General Public
+License version 3.0 as published by the Free Software Foundation and appearing
+in the file LICENSE.GPL included in the packaging of this file. Please review
+the following information to ensure the GNU General Public License version 3.0
+requirements will be met: http://www.gnu.org/copyleft/gpl.html.
+
+Other Usage
+Alternatively, this file may be used in accordance with the terms and
+conditions contained in a signed written agreement between you and Nokia.
+
+*/
+
+#include <QtCore>
+#include <QtTest>
+
+#include "qtcollator.h"
+
+class tst_QtCollator: public QObject
+{
+    Q_OBJECT
+
+private:
+    QStringList chileanData, chileanWords;
+    QStringList castellanoData, castellanoWords;
+
+    QStringList allData, allWords;
+
+    QStringList read(const QString &filename);
+    QStringList splitWords(const QStringList &list);
+
+public slots:
+    void initTestCase();
+    void cleanupTestCase();
+
+private slots:
+    void localeAwareCompare_data();
+    void localeAwareCompare();
+
+    void normal_data();
+    void normal();
+};
+
+QStringList tst_QtCollator::splitWords(const QStringList &list)
+{
+    QStringList result;
+    foreach (const QString &s, list)
+        result << s.split(" ");
+    return result;
+}
+
+QStringList tst_QtCollator::read(const QString &filename)
+{
+    QFile file(filename);
+    if (!file.open(QFile::ReadOnly))
+        return QStringList();
+
+    QByteArray data = file.readAll();
+    return QString::fromUtf8(data.constData(), data.size()).split("\n");
+}
+
+void tst_QtCollator::initTestCase()
+{
+    chileanData = read("chilean.txt");
+    chileanWords = splitWords(chileanData);
+    castellanoData = read("castellano.txt");
+    castellanoWords = splitWords(castellanoData);
+
+    allData << chileanData << castellanoData;
+    allWords << chileanWords << castellanoWords;
+}
+
+void tst_QtCollator::cleanupTestCase()
+{
+
+}
+
+void tst_QtCollator::localeAwareCompare_data()
+{
+    normal_data();
+}
+
+void tst_QtCollator::normal_data()
+{
+    QTest::addColumn<QString>("locale");
+    QTest::addColumn<QStringList>("data");
+
+    QTest::newRow("pt-PT:chilean:data") << "pt-PT" << chileanData;
+    QTest::newRow("pt-PT:chilean:words") << "pt-PT" << chileanWords;
+    QTest::newRow("pt-PT:castellano:data") << "pt-PT" << castellanoData;
+    QTest::newRow("pt-PT:castellano:words") << "pt-PT" << castellanoWords;
+
+    QTest::newRow("pt-PT:all:data") << "pt-PT" << allData;
+    QTest::newRow("pt-PT:all:words") << "pt-PT" << allWords;
+
+    QTest::newRow("zh-CN:all:data") << "zh-CN" << allData;
+    QTest::newRow("zh-CN:all:words") << "zh-CN" << allWords;
+
+    QTest::newRow("fr-FR:all:data") << "fr-FR" << allData;
+    QTest::newRow("fr-FR:all:words") << "fr-FR" << allWords;
+
+    QTest::newRow("fr-CA:all:data") << "fr-CA" << allData;
+    QTest::newRow("fr-Ca:all:words") << "fr-CA" << allWords;
+}
+
+void tst_QtCollator::normal()
+{
+    QFETCH(QString, locale);
+    QFETCH(QStringList, data);
+
+    QtCollator collator(locale);
+
+    QBENCHMARK {
+        qSort(data.begin(), data.end(), collator);
+    }
+}
+
+struct Comparator
+{
+    inline bool operator()(const QString &s1, const QString &s2) const
+    { return s1.localeAwareCompare(s2) < 0; }
+};
+
+void tst_QtCollator::localeAwareCompare()
+{
+    QFETCH(QString, locale);
+    QFETCH(QStringList, data);
+
+   Comparator c;
+
+    QBENCHMARK {
+        qSort(data.begin(), data.end(), c);
+    }
+}
+
+
+QTEST_MAIN(tst_QtCollator)
+
+#include "main.moc"
diff --git a/benchmark/qstringlist.pro b/benchmark/qstringlist.pro
new file mode 100644
index 0000000..e43cb37
--- /dev/null
+++ b/benchmark/qstringlist.pro
@@ -0,0 +1,16 @@
+TARGET = tst_bench_qtcollator
+CONFIG -= debug
+CONFIG += release
+QT -= gui
+QT += testlib
+
+INCLUDEPATH += . ..
+win32:INCLUDEPATH += . .. c:/users/denis/dev/icu/include
+
+unix:LIBS += -licuuc -licui18n
+win32:LIBS += -Lc:/users/denis/dev/icu/lib -licuin
+
+# Input
+HEADERS += ../qtcollator.h
+SOURCES += main.cpp ../qtcollator.cpp
+
diff --git a/collatorexplorer/collatorexplorer.pro b/collatorexplorer/collatorexplorer.pro
new file mode 100644
index 0000000..5a51b6d
--- /dev/null
+++ b/collatorexplorer/collatorexplorer.pro
@@ -0,0 +1,13 @@
+TEMPLATE = app
+TARGET = 
+DEPENDPATH += .
+
+INCLUDEPATH += . ..
+win32:INCLUDEPATH += . .. c:/users/denis/dev/icu/include
+
+unix:LIBS += -licuuc -licui18n
+win32:LIBS += -Lc:/users/denis/dev/icu/lib -licuin
+
+# Input
+HEADERS += ../qtcollator.h
+SOURCES += main.cpp ../qtcollator.cpp
diff --git a/collatorexplorer/data.txt b/collatorexplorer/data.txt
new file mode 100644
index 0000000..14336c3
--- /dev/null
+++ b/collatorexplorer/data.txt
@@ -0,0 +1,16 @@
+bad
+Bad
+Bat
+bat
+bäd
+Bäd
+bät
+Bät
+côté
+coté
+côte
+cote
+black-bird
+blackbird
+black-birds
+blackbirds
diff --git a/collatorexplorer/data_ar.txt b/collatorexplorer/data_ar.txt
new file mode 100644
index 0000000..8b560b4
--- /dev/null
+++ b/collatorexplorer/data_ar.txt
@@ -0,0 +1,22 @@
+الأحد
+الإثنين
+الثلاثاء
+يناير
+فبراير
+مارس
+bad
+Bad
+Bat
+bat
+bäd
+Bäd
+bät
+Bät
+côté
+coté
+côte
+cote
+black-bird
+blackbird
+black-birds
+blackbirds
diff --git a/collatorexplorer/data_de.txt b/collatorexplorer/data_de.txt
new file mode 100644
index 0000000..c0009ea
--- /dev/null
+++ b/collatorexplorer/data_de.txt
@@ -0,0 +1,13 @@
+Sonntag
+Montag
+Dienstag
+Januar
+Februar
+März
+Fuße
+Fluße
+Flusse
+flusse
+fluße
+flüße
+flüsse
diff --git a/collatorexplorer/data_de_DE.txt b/collatorexplorer/data_de_DE.txt
new file mode 100644
index 0000000..76d7d2e
--- /dev/null
+++ b/collatorexplorer/data_de_DE.txt
@@ -0,0 +1,7 @@
+Fuße
+Fluße
+Flusse
+flusse
+fluße
+flüße
+flüsse
diff --git a/collatorexplorer/data_fr.txt b/collatorexplorer/data_fr.txt
new file mode 100644
index 0000000..5ab54d3
--- /dev/null
+++ b/collatorexplorer/data_fr.txt
@@ -0,0 +1,23 @@
+dimanche
+lundi
+mardi
+janvier
+février
+mars
+déjà
+Meme
+deja
+même
+dejà
+bpef
+bœg
+Boef
+Mémé
+bœf
+boef
+bnef
+pêche
+pèché
+pêché
+pêche
+pêché
diff --git a/collatorexplorer/data_fr_FR.txt b/collatorexplorer/data_fr_FR.txt
new file mode 100644
index 0000000..897f13d
--- /dev/null
+++ b/collatorexplorer/data_fr_FR.txt
@@ -0,0 +1,17 @@
+déjà
+Meme
+deja
+même
+dejà
+bpef
+bœg
+Boef
+Mémé
+bœf
+boef
+bnef
+pêche
+pèché
+pêché
+pêche
+pêché
diff --git a/collatorexplorer/data_gsw.txt b/collatorexplorer/data_gsw.txt
new file mode 100644
index 0000000..0d15639
--- /dev/null
+++ b/collatorexplorer/data_gsw.txt
@@ -0,0 +1,22 @@
+Sunntig
+Määntig
+Ziischtig
+Januar
+Februar
+März
+bad
+Bad
+Bat
+bat
+bäd
+Bäd
+bät
+Bät
+côté
+coté
+côte
+cote
+black-bird
+blackbird
+black-birds
+blackbirds
diff --git a/collatorexplorer/data_gsw_CH.txt b/collatorexplorer/data_gsw_CH.txt
new file mode 100644
index 0000000..14336c3
--- /dev/null
+++ b/collatorexplorer/data_gsw_CH.txt
@@ -0,0 +1,16 @@
+bad
+Bad
+Bat
+bat
+bäd
+Bäd
+bät
+Bät
+côté
+coté
+côte
+cote
+black-bird
+blackbird
+black-birds
+blackbirds
diff --git a/collatorexplorer/data_ru.txt b/collatorexplorer/data_ru.txt
new file mode 100644
index 0000000..b6d6d0f
--- /dev/null
+++ b/collatorexplorer/data_ru.txt
@@ -0,0 +1,28 @@
+воскресенье
+понедельник
+вторник
+января
+февраля
+марта
+кот
+том
+атом
+Нева
+нет
+Москва
+север
+сумка
+муха
+вермут
+совет
+ресторан
+метро
+суп
+футбол
+Владивосток
+Юрий Гагарин
+Байкал
+Чехов
+Брежнев
+щи
+сын
diff --git a/collatorexplorer/data_zh.txt b/collatorexplorer/data_zh.txt
new file mode 100644
index 0000000..b937704
--- /dev/null
+++ b/collatorexplorer/data_zh.txt
@@ -0,0 +1,11 @@
+星期日
+星期一
+星期二
+1月
+2月
+3月
+盧傑克
+施尚吟
+施馬几
+埃西優
+施瑪機
diff --git a/collatorexplorer/data_zh_CN.txt b/collatorexplorer/data_zh_CN.txt
new file mode 100644
index 0000000..45a3222
--- /dev/null
+++ b/collatorexplorer/data_zh_CN.txt
@@ -0,0 +1,5 @@
+盧傑克
+施尚吟
+施馬几
+埃西優
+施瑪機
diff --git a/collatorexplorer/data_zh_Hans_CN.txt b/collatorexplorer/data_zh_Hans_CN.txt
new file mode 100644
index 0000000..45a3222
--- /dev/null
+++ b/collatorexplorer/data_zh_Hans_CN.txt
@@ -0,0 +1,5 @@
+盧傑克
+施尚吟
+施馬几
+埃西優
+施瑪機
diff --git a/collatorexplorer/data_zh_Hant_CN.txt b/collatorexplorer/data_zh_Hant_CN.txt
new file mode 100644
index 0000000..45a3222
--- /dev/null
+++ b/collatorexplorer/data_zh_Hant_CN.txt
@@ -0,0 +1,5 @@
+盧傑克
+施尚吟
+施馬几
+埃西優
+施瑪機
diff --git a/collatorexplorer/main.cpp b/collatorexplorer/main.cpp
new file mode 100644
index 0000000..5d85e3b
--- /dev/null
+++ b/collatorexplorer/main.cpp
@@ -0,0 +1,241 @@
+/** This file is part of QtCollator **
+
+Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).*
+
+Contact:  Nokia Corporation (info@qt.nokia.com)**
+
+GNU Lesser General Public License Usage
+This file may be used under the terms of the GNU Lesser General Public License
+version 2.1 as published by the Free Software Foundation and appearing in the
+file LICENSE.LGPL included in the packaging of this file. Please review the
+following information to ensure the GNU Lesser General Public License version
+2.1 requirements will be met:
+http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+
+In addition, as a special exception, Nokia gives you certain additional rights.
+These rights are described in the Nokia Qt LGPL Exception version 1.1, included
+in the file LGPL_EXCEPTION.txt in this package.
+
+GNU General Public License Usage
+Alternatively, this file may be used under the terms of the GNU General Public
+License version 3.0 as published by the Free Software Foundation and appearing
+in the file LICENSE.GPL included in the packaging of this file. Please review
+the following information to ensure the GNU General Public License version 3.0
+requirements will be met: http://www.gnu.org/copyleft/gpl.html.
+
+Other Usage
+Alternatively, this file may be used in accordance with the terms and
+conditions contained in a signed written agreement between you and Nokia.
+
+*/
+
+#include <QtGui>
+#include "qtcollator.h"
+
+class Widget : public QWidget
+{
+    Q_OBJECT
+public:
+    Widget();
+
+public slots:
+    void sort();
+    void dataComboChanged(int);
+    void localeComboChanged(int);
+
+private:
+    void fetchOptions();
+    bool loadFile(const QString &name);
+    void loadDataForLocale(const QString &name);
+
+    QComboBox *localeCombo;
+    QComboBox *dataCombo;
+    QTextEdit *textEdit1;
+    QTextEdit *textEdit2;
+    QComboBox *strengthCombo;
+    QComboBox *caseCombo;
+    QCheckBox *frenchCheckBox;
+    QCheckBox *normalizationCheckBox;
+    QCheckBox *ignorePunctuationCheckBox;
+    QCheckBox *caseLevelCheckBox;
+    QCheckBox *hiraganaCheckBox;
+    QCheckBox *numericCheckBox;
+
+    QtCollator collator;
+};
+
+Widget::Widget()
+{
+    QLocale system = QLocale::system();
+    localeCombo = new QComboBox;
+    QList<QLocale> locales = QLocale::matchingLocales(QLocale::AnyLanguage, QLocale::AnyScript, QLocale::AnyCountry);
+    localeCombo->addItem(QLatin1String("System: ") + system.bcp47Name(), system);
+    foreach (QLocale l, locales)
+        localeCombo->addItem(l.bcp47Name(), l);
+    localeCombo->setCurrentIndex(0);
+    connect(localeCombo, SIGNAL(currentIndexChanged(int)), this, SLOT(localeComboChanged(int)));
+
+    QHBoxLayout *l = new QHBoxLayout(this);
+    textEdit1 = new QTextEdit;
+    QWidget *panel = new QWidget;
+    textEdit2 = new QTextEdit;
+    QVBoxLayout *lv = new QVBoxLayout;
+    dataCombo = new QComboBox;
+    lv->addWidget(dataCombo);
+    lv->addWidget(textEdit1);
+    l->addLayout(lv);
+    l->addWidget(panel);
+    l->addWidget(textEdit2);
+
+    QVBoxLayout *v = new QVBoxLayout(panel);
+
+    v->addWidget(localeCombo);
+
+    QPushButton *sortButton = new QPushButton("Sort");
+    connect(sortButton, SIGNAL(clicked()), this, SLOT(sort()));
+    v->addWidget(sortButton);
+
+    strengthCombo = new QComboBox;
+    strengthCombo->addItem("Primary (Base Letters)", (int)QtCollator::PrimaryStrength);
+    strengthCombo->addItem("Secondary (Primary + Accents)", (int)QtCollator::SecondaryStrength);
+    strengthCombo->addItem("Tertiary (Secondary + Case )", (int)QtCollator::TertiaryStrength);
+    strengthCombo->addItem("Quaternary (Tertiary + Punct.)", (int)QtCollator::QuaternaryStrength);
+    strengthCombo->addItem("Identical (Quaternary + Codepoint)", (int)QtCollator::IdenticalStrength);
+    strengthCombo->setCurrentIndex(2);
+    v->addWidget(strengthCombo);
+
+    caseCombo = new QComboBox;
+    caseCombo->addItem("Don't force case", (int)0);
+    caseCombo->addItem("Force Lowercase first", (int)QtCollator::PreferLowerCase);
+    caseCombo->addItem("Force Uppercase first", (int)QtCollator::PreferUpperCase);
+    caseCombo->setCurrentIndex(0);
+    v->addWidget(caseCombo);
+
+    frenchCheckBox = new QCheckBox("French accents");
+    v->addWidget(frenchCheckBox);
+    normalizationCheckBox = new QCheckBox("String normalization");
+    normalizationCheckBox->setChecked(true);
+    v->addWidget(normalizationCheckBox);
+    ignorePunctuationCheckBox = new QCheckBox("Ignore punctuation");
+    v->addWidget(ignorePunctuationCheckBox);
+    caseLevelCheckBox = new QCheckBox("Add case level");
+    v->addWidget(caseLevelCheckBox);
+    hiraganaCheckBox = new QCheckBox("Add Hiragana level");
+    v->addWidget(hiraganaCheckBox);
+    numericCheckBox = new QCheckBox("Numeric collation");
+    v->addWidget(numericCheckBox);
+
+    loadDataForLocale(system.bcp47Name().replace('-', '_'));
+    localeComboChanged(0);
+}
+
+void Widget::loadDataForLocale(const QString &name)
+{
+    int index = -1;
+
+    // get a list of data files
+    QDir dir = QDir::current();
+    // those data files contain texts from different places, typed manually or
+    // copied a few words from wikipedia articles, etc.
+    QStringList files = dir.entryList(QStringList("data_*.txt"));
+    foreach (const QString &fileName, files) {
+        QString localeName = fileName.left(fileName.size()-4).mid(5);
+        dataCombo->addItem(QString("data.txt: %1").arg(localeName), QLocale(localeName));
+        if (localeName == name)
+            index = dataCombo->count()-1;
+    }
+    connect(dataCombo, SIGNAL(currentIndexChanged(int)), this, SLOT(dataComboChanged(int)));
+    dataCombo->setCurrentIndex(index);
+}
+
+void Widget::localeComboChanged(int idx)
+{
+    QLocale locale = localeCombo->itemData(idx).toLocale();
+    collator.setLocale(locale);
+    fetchOptions();
+}
+
+void Widget::dataComboChanged(int idx)
+{
+    QLocale locale = dataCombo->itemData(idx).toLocale();
+    QString name = locale.bcp47Name().replace('-', '_');
+    while (!name.isEmpty() && !loadFile(QLatin1String("data_")+name+".txt")) {
+        name.truncate(name.lastIndexOf('_'));
+    }
+    if (name.isEmpty())
+        loadFile(QLatin1String("data.txt"));
+}
+
+bool Widget::loadFile(const QString &name)
+{
+    QFile file(name);
+    if (!file.open(QFile::ReadOnly))
+        return false;
+
+    QByteArray data = file.readAll();
+    QString stringData = QString::fromUtf8(data.constData(), data.size());
+    stringData = stringData.trimmed();
+    textEdit1->setText(stringData);
+    return true;
+}
+
+void Widget::sort()
+{
+    int value = strengthCombo->itemData(strengthCombo->currentIndex()).toInt();
+    collator.setStrength(QtCollator::Strength(value));
+
+    value = 0;
+
+    value |= caseCombo->itemData(caseCombo->currentIndex()).toInt();
+    if (!normalizationCheckBox->isChecked())
+        value |= QtCollator::DisableNormalization;
+    if (ignorePunctuationCheckBox->isChecked())
+        value |= QtCollator::IgnorePunctuation;
+    if (frenchCheckBox->isChecked())
+        value |= QtCollator::FrenchCollation;
+    if (caseLevelCheckBox->isChecked())
+        value |= QtCollator::ExtraCaseLevel;
+    if (hiraganaCheckBox->isChecked())
+        value |= QtCollator::HiraganaQuaternaryMode;
+    if (numericCheckBox->isChecked())
+        value |= QtCollator::NumericMode;
+
+    collator.setOptions(QtCollator::Options(value));
+
+    QStringList stringList = textEdit1->toPlainText().split("\n");
+    qSort(stringList.begin(), stringList.end(), collator);
+    textEdit2->setText(stringList.join("\n"));
+
+    foreach (const QString &s, stringList)
+        collator.sortKey(s);
+}
+
+void Widget::fetchOptions()
+{
+    strengthCombo->setCurrentIndex((int)collator.strength()-1);
+
+    if (collator.casePreference() == QtCollator::IgnoreCase)
+        caseCombo->setCurrentIndex(0);
+    else if (collator.casePreference() == QtCollator::LowerCase)
+        caseCombo->setCurrentIndex(1);
+    else if (collator.casePreference() == QtCollator::UpperCase)
+        caseCombo->setCurrentIndex(2);
+
+    frenchCheckBox->setChecked(collator.options() & QtCollator::FrenchCollation);
+    normalizationCheckBox->setChecked(!(collator.options() & QtCollator::DisableNormalization));
+    ignorePunctuationCheckBox->setChecked(collator.options() & QtCollator::IgnorePunctuation);
+    caseLevelCheckBox->setChecked(collator.options() & QtCollator::ExtraCaseLevel);
+    hiraganaCheckBox->setChecked(collator.options() & QtCollator::HiraganaQuaternaryMode);
+    numericCheckBox->setChecked(collator.options() & QtCollator::NumericMode);
+}
+
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+    Widget w;
+    w.show();
+    return app.exec();
+}
+
+#include "main.moc"
diff --git a/qsort/main.cpp b/qsort/main.cpp
new file mode 100644
index 0000000..b4cb065
--- /dev/null
+++ b/qsort/main.cpp
@@ -0,0 +1,105 @@
+/** This file is part of QtCollator **
+
+Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).*
+
+Contact:  Nokia Corporation (info@qt.nokia.com)**
+
+GNU Lesser General Public License Usage
+This file may be used under the terms of the GNU Lesser General Public License
+version 2.1 as published by the Free Software Foundation and appearing in the
+file LICENSE.LGPL included in the packaging of this file. Please review the
+following information to ensure the GNU Lesser General Public License version
+2.1 requirements will be met:
+http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+
+In addition, as a special exception, Nokia gives you certain additional rights.
+These rights are described in the Nokia Qt LGPL Exception version 1.1, included
+in the file LGPL_EXCEPTION.txt in this package.
+
+GNU General Public License Usage
+Alternatively, this file may be used under the terms of the GNU General Public
+License version 3.0 as published by the Free Software Foundation and appearing
+in the file LICENSE.GPL included in the packaging of this file. Please review
+the following information to ensure the GNU General Public License version 3.0
+requirements will be met: http://www.gnu.org/copyleft/gpl.html.
+
+Other Usage
+Alternatively, this file may be used in accordance with the terms and
+conditions contained in a signed written agreement between you and Nokia.
+
+*/
+
+#include <QtCore>
+#include "qtcollator.h"
+
+void help()
+{
+    qApp->quit();
+}
+
+int main(int argc, char **argv)
+{
+    QCoreApplication app(argc, argv);
+
+    QString localeName;
+    enum Option { Default, On, Off };
+    Option numericMode = Default;
+    Option lowerCase = Default;
+    Option upperCase = Default;
+    Option french = Default;
+    Option ignorePunctuation = Default;
+
+    QStringList args = app.arguments();
+    for (int i = 1; i < args.size();) {
+        QString arg = args.at(i);
+        bool value = true;
+        if (arg.startsWith(QLatin1String("-no-"))) {
+            value = false;
+            arg = arg.mid(3);
+        }
+        if (arg == "-locale") {
+            ++i;
+            if (args.size() >= i+1)
+                help();
+            localeName = args.at(i);
+        } else if (arg == "-numeric") {
+            numericMode = value ? On : Off;
+        } else if (arg == "-uppercase") {
+            upperCase = value ? On : Off;
+        } else if (arg == "-lowercase") {
+            lowerCase = value ? On : Off;
+        } else if (arg == "-french") {
+            french = value ? On : Off;
+        } else if (arg == "-ignorepunctuation") {
+            ignorePunctuation = value ? On : Off;
+        }
+        ++i;
+    }
+
+    QTextStream input(stdin, QIODevice::ReadOnly);
+    QStringList data;
+    while (!input.atEnd())
+        data.append(input.readLine());
+    if (data.last().trimmed().isEmpty())
+        data.pop_back();
+
+    QtCollator collator(localeName.isEmpty() ? QLocale() : QLocale(localeName));
+    if (numericMode != Default)
+        collator.setNumericMode(numericMode == On);
+    if (lowerCase != Default)
+        collator.setCasePreference(lowerCase == On ? QtCollator::LowerCase : QtCollator::IgnoreCase);
+    if (upperCase != Default)
+        collator.setCasePreference(upperCase == On ? QtCollator::UpperCase : QtCollator::IgnoreCase);
+    if (french != Default)
+        collator.setOptions(collator.options() & QtCollator::FrenchCollation);
+    if (ignorePunctuation != Default)
+        collator.setOptions(collator.options() & QtCollator::IgnorePunctuation);
+
+    qSort(data.begin(), data.end(), collator);
+
+    QTextStream output(stdout, QIODevice::WriteOnly);
+    foreach (const QString &s, data)
+        output << s << QLatin1String("\n");
+
+    return 0;
+}
diff --git a/qsort/qsort.pro b/qsort/qsort.pro
new file mode 100644
index 0000000..5a51b6d
--- /dev/null
+++ b/qsort/qsort.pro
@@ -0,0 +1,13 @@
+TEMPLATE = app
+TARGET = 
+DEPENDPATH += .
+
+INCLUDEPATH += . ..
+win32:INCLUDEPATH += . .. c:/users/denis/dev/icu/include
+
+unix:LIBS += -licuuc -licui18n
+win32:LIBS += -Lc:/users/denis/dev/icu/lib -licuin
+
+# Input
+HEADERS += ../qtcollator.h
+SOURCES += main.cpp ../qtcollator.cpp
diff --git a/qtcollator.cpp b/qtcollator.cpp
new file mode 100644
index 0000000..f8da886
--- /dev/null
+++ b/qtcollator.cpp
@@ -0,0 +1,300 @@
+/** This file is part of QtCollator **
+
+Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).*
+
+Contact:  Nokia Corporation (info@qt.nokia.com)**
+
+GNU Lesser General Public License Usage
+This file may be used under the terms of the GNU Lesser General Public License
+version 2.1 as published by the Free Software Foundation and appearing in the
+file LICENSE.LGPL included in the packaging of this file. Please review the
+following information to ensure the GNU Lesser General Public License version
+2.1 requirements will be met:
+http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+
+In addition, as a special exception, Nokia gives you certain additional rights.
+These rights are described in the Nokia Qt LGPL Exception version 1.1, included
+in the file LGPL_EXCEPTION.txt in this package.
+
+GNU General Public License Usage
+Alternatively, this file may be used under the terms of the GNU General Public
+License version 3.0 as published by the Free Software Foundation and appearing
+in the file LICENSE.GPL included in the packaging of this file. Please review
+the following information to ensure the GNU General Public License version 3.0
+requirements will be met: http://www.gnu.org/copyleft/gpl.html.
+
+Other Usage
+Alternatively, this file may be used in accordance with the terms and
+conditions contained in a signed written agreement between you and Nokia.
+
+*/
+
+#include "qtcollator.h"
+
+#include <unicode/utypes.h>
+#include <unicode/ucol.h>
+#include <unicode/ustring.h>
+
+#include "qdebug.h"
+
+QT_BEGIN_NAMESPACE
+
+class QtCollatorPrivate
+{
+public:
+    QBasicAtomicInt ref;
+    bool modified;
+    QLocale locale;
+    QtCollator::Strength strength;
+    QtCollator::Options options;
+
+    UCollator *collator;
+
+    QtCollatorPrivate()
+        : modified(true),
+          strength(QtCollator::TertiaryStrength),
+          options(0),
+          collator(0)
+    { ref = 1; }
+
+    int compare(ushort *s1, int len1, ushort *s2, int len2);
+};
+
+QtCollator::QtCollator(const QLocale &locale)
+    : d(new QtCollatorPrivate)
+{
+    setLocale(locale);
+}
+
+QtCollator::QtCollator(const QtCollator &other)
+    : d(other.d)
+{
+    d->ref.ref();
+}
+
+QtCollator::~QtCollator()
+{
+    if (!d->ref.deref()) {
+        if (d->collator)
+            ucol_close(d->collator);
+    }
+}
+
+QtCollator &QtCollator::operator=(const QtCollator &other)
+{
+    if (this != &other) {
+        if (!d->ref.deref()) {
+            if (d->collator)
+                ucol_close(d->collator);
+        }
+        *d = *other.d;
+        d->ref.ref();
+    }
+    return *this;
+}
+
+void QtCollator::setLocale(const QLocale &locale)
+{
+    if (d->ref != 1)
+        detach();
+    if (d->collator)
+        ucol_close(d->collator);
+    d->locale = locale;
+
+    UErrorCode status = U_ZERO_ERROR;
+    QByteArray name = locale.bcp47Name().replace(QLatin1Char('-'), QLatin1Char('_')).toLatin1();
+    d->collator = ucol_open(name.constData(), &status);
+    if (U_FAILURE(status))
+        qWarning("Could not create collator: %d", status);
+
+    // enable normalization by default
+    ucol_setAttribute(d->collator, UCOL_NORMALIZATION_MODE, UCOL_ON, &status);
+
+    // fetch options from the collator
+    d->options = 0;
+
+    switch (ucol_getAttribute(d->collator, UCOL_CASE_FIRST, &status)) {
+    case UCOL_UPPER_FIRST: d->options |= QtCollator::PreferUpperCase; break;
+    case UCOL_LOWER_FIRST: d->options |= QtCollator::PreferLowerCase; break;
+    case UCOL_OFF:
+    default:
+        break;
+    }
+
+    switch (ucol_getAttribute(d->collator, UCOL_FRENCH_COLLATION, &status)) {
+    case UCOL_ON: d->options |= QtCollator::FrenchCollation; break;
+    case UCOL_OFF:
+    default:
+        break;
+    }
+
+    switch (ucol_getAttribute(d->collator, UCOL_ALTERNATE_HANDLING, &status)) {
+    case UCOL_SHIFTED: d->options |= QtCollator::IgnorePunctuation; break;
+    case UCOL_NON_IGNORABLE:
+    default:
+        break;
+    }
+
+
+    switch (ucol_getAttribute(d->collator, UCOL_CASE_LEVEL, &status)) {
+    case UCOL_ON: d->options |= QtCollator::ExtraCaseLevel; break;
+    case UCOL_OFF:
+    default:
+        break;
+    }
+
+    switch (ucol_getAttribute(d->collator, UCOL_HIRAGANA_QUATERNARY_MODE, &status)) {
+    case UCOL_ON: d->options |= QtCollator::HiraganaQuaternaryMode; break;
+    case UCOL_OFF:
+    default:
+        break;
+    }
+
+    switch (ucol_getAttribute(d->collator, UCOL_NUMERIC_COLLATION, &status)) {
+    case UCOL_ON: d->options |= QtCollator::NumericMode; break;
+    case UCOL_OFF:
+    default:
+        break;
+    }
+}
+
+QLocale QtCollator::locale() const
+{
+    return d->locale;
+}
+
+void QtCollator::detach()
+{
+    if (d->ref != 1) {
+        QtCollatorPrivate *x = new QtCollatorPrivate;
+        x->ref = 1;
+        x->strength = d->strength;
+        x->options = d->options;
+        x->modified = true;
+        x->collator = 0;
+        if (!d->ref.deref()) {
+            if (d->collator)
+                ucol_close(d->collator);
+        }
+        d = x;
+    }
+}
+
+void QtCollator::setStrength(QtCollator::Strength strength)
+{
+    if (d->ref != 1)
+        detach();
+
+    switch (strength) {
+    case QtCollator::PrimaryStrength:    ucol_setStrength(d->collator, UCOL_PRIMARY); break;
+    case QtCollator::SecondaryStrength:  ucol_setStrength(d->collator, UCOL_SECONDARY); break;
+    case QtCollator::TertiaryStrength:   ucol_setStrength(d->collator, UCOL_TERTIARY); break;
+    case QtCollator::QuaternaryStrength: ucol_setStrength(d->collator, UCOL_QUATERNARY); break;
+    case QtCollator::IdenticalStrength:  ucol_setStrength(d->collator, UCOL_IDENTICAL); break;
+    default:
+        qWarning("Invalid strength mode %d", strength);
+    }
+}
+
+QtCollator::Strength QtCollator::strength() const
+{
+    switch (ucol_getStrength(d->collator)) {
+    case UCOL_PRIMARY:   return QtCollator::PrimaryStrength;
+    case UCOL_SECONDARY: return QtCollator::SecondaryStrength;
+    case UCOL_QUATERNARY:return QtCollator::QuaternaryStrength;
+    case UCOL_IDENTICAL: return QtCollator::IdenticalStrength;
+    case UCOL_TERTIARY:
+    default:
+        return QtCollator::TertiaryStrength;
+    }
+    return QtCollator::TertiaryStrength;
+}
+
+void QtCollator::setOptions(QtCollator::Options options)
+{
+    if (d->ref != 1)
+        detach();
+
+    d->options = options;
+
+    UErrorCode status = U_ZERO_ERROR;
+
+    if (options & QtCollator::PreferUpperCase)
+        ucol_setAttribute(d->collator, UCOL_CASE_FIRST, UCOL_UPPER_FIRST, &status);
+    else if (options & QtCollator::PreferLowerCase)
+        ucol_setAttribute(d->collator, UCOL_CASE_FIRST, UCOL_LOWER_FIRST, &status);
+    else
+        ucol_setAttribute(d->collator, UCOL_CASE_FIRST, UCOL_OFF, &status);
+    if (U_FAILURE(status))
+        qWarning("ucol_setAttribute: Case First failed: %d", status);
+
+    ucol_setAttribute(d->collator, UCOL_FRENCH_COLLATION,
+                      options & QtCollator::FrenchCollation ? UCOL_ON : UCOL_OFF, &status);
+    if (U_FAILURE(status))
+        qWarning("ucol_setAttribute: French collation failed: %d", status);
+
+    ucol_setAttribute(d->collator, UCOL_NORMALIZATION_MODE,
+                      options & QtCollator::DisableNormalization ? UCOL_OFF : UCOL_ON, &status);
+    if (U_FAILURE(status))
+        qWarning("ucol_setAttribute: Normalization mode failed: %d", status);
+
+    ucol_setAttribute(d->collator, UCOL_ALTERNATE_HANDLING,
+                      (options & QtCollator::IgnorePunctuation) ? UCOL_SHIFTED : UCOL_NON_IGNORABLE, &status);
+    if (U_FAILURE(status))
+        qWarning("ucol_setAttribute: Alternate handling failed: %d", status);
+
+    ucol_setAttribute(d->collator, UCOL_CASE_LEVEL,
+                      options & QtCollator::ExtraCaseLevel ? UCOL_ON : UCOL_OFF, &status);
+    if (U_FAILURE(status))
+        qWarning("ucol_setAttribute: Case level failed: %d", status);
+
+    ucol_setAttribute(d->collator, UCOL_HIRAGANA_QUATERNARY_MODE,
+                      options & QtCollator::HiraganaQuaternaryMode ? UCOL_ON : UCOL_OFF, &status);
+    if (U_FAILURE(status))
+        qWarning("ucol_setAttribute: hiragana mode failed: %d", status);
+
+    ucol_setAttribute(d->collator, UCOL_NUMERIC_COLLATION,
+                      options & QtCollator::NumericMode ? UCOL_ON : UCOL_OFF, &status);
+    if (U_FAILURE(status))
+        qWarning("ucol_setAttribute: numeric collation failed: %d", status);
+}
+
+QtCollator::Options QtCollator::options() const
+{
+    return d->options;
+}
+
+int QtCollator::compare(const QString &s1, const QString &s2) const
+{
+    return d->compare((ushort *)s1.constData(), s1.size(), (ushort *)s2.constData(), s2.size());
+}
+
+int QtCollator::compare(const QStringRef &s1, const QStringRef &s2) const
+{
+    return d->compare((ushort *)s1.constData(), s1.size(), (ushort *)s2.constData(), s2.size());
+}
+
+int QtCollatorPrivate::compare(ushort *s1, int len1, ushort *s2, int len2)
+{
+    const UCollationResult result =
+            ucol_strcoll(collator, (const UChar *)s1, len1, (const UChar *)s2, len2);
+    return result;
+}
+
+QByteArray QtCollator::sortKey(const QString &string) const
+{
+    QByteArray result(16 + string.size() + (string.size() >> 2), Qt::Uninitialized);
+    int size = ucol_getSortKey(d->collator, (const UChar *)string.constData(),
+                               string.size(), (uint8_t *)result.data(), result.size());
+    if (size > result.size()) {
+#ifdef _DEBUG
+        qDebug() << "### sortKey realloc from" << result.size() << "to" << size << "for string" << string.size();
+#endif
+        result.resize(size);
+        size = ucol_getSortKey(d->collator, (const UChar *)string.constData(),
+                               string.size(), (uint8_t *)result.data(), result.size());
+    }
+    result.truncate(size);
+    return result;
+}
+QT_END_NAMESPACE
diff --git a/qtcollator.h b/qtcollator.h
new file mode 100644
index 0000000..46739ac
--- /dev/null
+++ b/qtcollator.h
@@ -0,0 +1,136 @@
+/** This file is part of QtCollator **
+
+Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).*
+
+Contact:  Nokia Corporation (info@qt.nokia.com)**
+
+GNU Lesser General Public License Usage
+This file may be used under the terms of the GNU Lesser General Public License
+version 2.1 as published by the Free Software Foundation and appearing in the
+file LICENSE.LGPL included in the packaging of this file. Please review the
+following information to ensure the GNU Lesser General Public License version
+2.1 requirements will be met:
+http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+
+In addition, as a special exception, Nokia gives you certain additional rights.
+These rights are described in the Nokia Qt LGPL Exception version 1.1, included
+in the file LGPL_EXCEPTION.txt in this package.
+
+GNU General Public License Usage
+Alternatively, this file may be used under the terms of the GNU General Public
+License version 3.0 as published by the Free Software Foundation and appearing
+in the file LICENSE.GPL included in the packaging of this file. Please review
+the following information to ensure the GNU General Public License version 3.0
+requirements will be met: http://www.gnu.org/copyleft/gpl.html.
+
+Other Usage
+Alternatively, this file may be used in accordance with the terms and
+conditions contained in a signed written agreement between you and Nokia.
+
+*/
+
+#ifndef QTCOLLATOR_H
+#define QTCOLLATOR_H
+
+#include "qstring.h"
+#include "qlocale.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+class QtCollatorPrivate;
+class QtCollator
+{
+public:
+    enum Strength {
+        PrimaryStrength = 1,
+        BaseLetterStrength = PrimaryStrength,
+
+        SecondaryStrength = 2,
+        AccentsStrength = SecondaryStrength,
+
+        TertiaryStrength = 3,
+        CaseStrength = TertiaryStrength,
+
+        QuaternaryStrength = 4,
+        PunctuationStrength = QuaternaryStrength,
+
+        IdenticalStrength = 5,
+        CodepointStrength = IdenticalStrength
+    };
+
+    enum Option {
+        PreferUpperCase        = 0x01,
+        PreferLowerCase        = 0x02,
+        FrenchCollation        = 0x04,
+        DisableNormalization   = 0x08,
+        IgnorePunctuation      = 0x10,
+        ExtraCaseLevel         = 0x20,
+        HiraganaQuaternaryMode = 0x40,
+        NumericMode            = 0x80
+    };
+    Q_DECLARE_FLAGS(Options, Option)
+
+    QtCollator(const QLocale &locale = QLocale());
+    QtCollator(const QtCollator &);
+    ~QtCollator();
+    QtCollator &operator=(const QtCollator &);
+
+    void setLocale(const QLocale &locale);
+    QLocale locale() const;
+
+    void setStrength(Strength);
+    Strength strength() const;
+
+    void setOptions(Options);
+    Options options() const;
+
+    enum CasePreference {
+        IgnoreCase = 0x0,
+        UpperCase  = 0x1,
+        LowerCase  = 0x2
+    };
+
+    bool isCaseSensitive() const
+    { return options() & (PreferUpperCase | PreferLowerCase); }
+    CasePreference casePreference() const
+    {
+        int value = options() & 0x3;
+        if (value == 3)
+            return UpperCase;
+        return CasePreference(value);
+    }
+    void setCasePreference(CasePreference c)
+    {
+        Options o = options() & ~(PreferUpperCase | PreferLowerCase);
+        if (c == UpperCase)
+            o |= PreferUpperCase;
+        else if (c == LowerCase)
+            o |= PreferLowerCase;
+        setOptions(o);
+    }
+
+    void setNumericMode(bool on)
+    { setOptions(on ? options() | NumericMode : options() & ~NumericMode); }
+    bool numericMode() const
+    { return options() & NumericMode; }
+
+    int compare(const QString &s1, const QString &s2) const;
+    int compare(const QStringRef &s1, const QStringRef &s2) const;
+    bool operator()(const QString &s1, const QString &s2) const
+    { return compare(s1, s2) < 0; }
+
+    QByteArray sortKey(const QString &string) const;
+
+private:
+    QtCollatorPrivate *d;
+
+    void detach();
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QTCOLLATOR_H