Add QLocale::toUpper/Lower

The toUpper/Lower() methods in QString should not
be locale dependent, as this can lead to rather
hard to find bugs in at least a turkish locale.

Rather have explicit, locale dependend case conversions
available in QLocale.

Reviewed-by: Denis Dzyubenko

1 files changed, 8 insertions, 22 deletions

diff --git a/src/corelib/tools/qstring.cpp b/src/corelib/tools/qstring.cpp
index ee45cfd..c303c00 100644
--- a/src/corelib/tools/qstring.cpp
+++ b/src/corelib/tools/qstring.cpp
@@ -109,8 +109,6 @@ static QHash<void *, QByteArray> *asciiCache = 0;
 #ifdef QT_USE_ICU
 // qlocale_icu.cpp
 extern bool qt_ucol_strcoll(const QChar *source, int sourceLength, const QChar *target, int targetLength, int *result);
-extern bool qt_u_strToUpper(const QString &str, QString *out, const QLocale &locale);
-extern bool qt_u_strToLower(const QString &str, QString *out, const QLocale &locale);
 #endif
 
 
@@ -5012,7 +5010,10 @@ QString QString::rightJustified(int width, QChar fill, bool truncate) const
 
     \snippet doc/src/snippets/qstring/main.cpp 75
 
-    \sa toUpper()
+    The case conversion will always happen in the 'C' locale. For locale dependent
+    case folding use QLocale::toLower()
+
+    \sa toUpper(), QLocale::toLower()
 */
 
 QString QString::toLower() const
@@ -5023,15 +5024,6 @@ QString QString::toLower() const
     if (!d->size)
         return *this;
 
-#ifdef QT_USE_ICU
-    {
-        QString result;
-        if (qt_u_strToLower(*this, &result, QLocale()))
-            return result;
-        // else fall through and use Qt's toUpper
-    }
-#endif
-
     const ushort *e = d->data + d->size;
 
     // this avoids one out of bounds check in the loop
@@ -5112,7 +5104,10 @@ QString QString::toCaseFolded() const
 
     \snippet doc/src/snippets/qstring/main.cpp 81
 
-    \sa toLower()
+    The case conversion will always happen in the 'C' locale. For locale dependent
+    case folding use QLocale::toUpper()
+
+    \sa toLower(), QLocale::toLower()
 */
 
 QString QString::toUpper() const
@@ -5123,15 +5118,6 @@ QString QString::toUpper() const
     if (!d->size)
         return *this;
 
-#ifdef QT_USE_ICU
-    {
-        QString result;
-        if (qt_u_strToUpper(*this, &result, QLocale()))
-            return result;
-        // else fall through and use Qt's toUpper
-    }
-#endif
-
     const ushort *e = d->data + d->size;
 
     // this avoids one out of bounds check in the loop