QString: Make convert to number methods only use C locale

Ensure consistent conversions by not using the system default locale.

Change-Id: I60db9fc4f465c0254f3213419e57d7879aaddd65
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>

4 files changed, 152 insertions, 209 deletions

diff --git a/dist/changes-5.0.0 b/dist/changes-5.0.0
index e5f57732ba..ea88471990 100644
--- a/dist/changes-5.0.0
+++ b/dist/changes-5.0.0
@@ -240,6 +240,12 @@ QtCore
   now return an empty QString, QStringRef or QByteArray respectively.
   in Qt 4 they returned a null QString or a null QStringRef.
 
+* QString methods toLongLong(), toULongLong(), toLong(), toULong(), toInt(),
+  toUInt(), toShort(), toUShort(), toDouble(), and toFloat() no longer use the
+  default or system locale, they will always use the C locale. This is to
+  guarantee consistent default conversion of strings. For locale-aware conversions
+  use the equivalent QLocale methods.
+
 * QDate, QTime, and QDateTime have undergone important behavioural changes:
   * QDate only implements the Gregorian calendar, the switch to the Julian
     calendar before 1582 has been removed. This means all QDate methods will
diff --git a/doc/src/snippets/qstring/main.cpp b/doc/src/snippets/qstring/main.cpp
index 48bfea9e53..d0a445731c 100644
--- a/doc/src/snippets/qstring/main.cpp
+++ b/doc/src/snippets/qstring/main.cpp
@@ -737,20 +737,15 @@ void Widget::toDoubleFunction()
     d = QString( "1234.56e-02" ).toDouble(&ok); // ok == true, d == 12.3456
     //! [67]
 
-    //! [68] //! [69]
-    QLocale::setDefault(QLocale::C);
-    d = QString( "1234,56" ).toDouble(&ok); // ok == false
     //! [68]
+    d = QString( "1234,56" ).toDouble(&ok); // ok == false
     d = QString( "1234.56" ).toDouble(&ok); // ok == true, d == 1234.56
+    //! [68]
 
-    //! [69] //! [70]
-    QLocale::setDefault(QLocale::German);
-    d = QString( "1234,56" ).toDouble(&ok); // ok == true, d == 1234.56
-    d = QString( "1234.56" ).toDouble(&ok); // ok == true, d == 1234.56
-
-    //! [70]
-    QLocale::setDefault(QLocale::C);
+    //! [69]
     d = QString( "1,234,567.89" ).toDouble(&ok); // ok == false
+    d = QString( "1234567.89" ).toDouble(&ok); // ok == true
+     //! [69]
 }
 
 void Widget::toFloatFunction()
diff --git a/src/corelib/tools/qstring.cpp b/src/corelib/tools/qstring.cpp
index c285f7a007..524096b889 100644
--- a/src/corelib/tools/qstring.cpp
+++ b/src/corelib/tools/qstring.cpp
@@ -5433,11 +5433,14 @@ QString &QString::vsprintf(const char* cformat, va_list ap)
     begins with "0x", base 16 is used; if the string begins with "0",
     base 8 is used; otherwise, base 10 is used.
 
+    The string conversion will always happen in the 'C' locale. For locale
+    dependent conversion use QLocale::toLongLong()
+
     Example:
 
     \snippet doc/src/snippets/qstring/main.cpp 74
 
-    \sa number(), toULongLong(), toInt()
+    \sa number(), toULongLong(), toInt(), QLocale::toLongLong()
 */
 
 qint64 QString::toLongLong(bool *ok, int base) const
@@ -5449,15 +5452,6 @@ qint64 QString::toLongLong(bool *ok, int base) const
     }
 #endif
 
-    bool my_ok;
-    QLocale def_locale;
-    qint64 result = def_locale.d()->stringToLongLong(*this, base, &my_ok, QLocalePrivate::FailOnGroupSeparators);
-    if (my_ok) {
-        if (ok != 0)
-            *ok = true;
-        return result;
-    }
-
     QLocale c_locale(QLocale::C);
     return c_locale.d()->stringToLongLong(*this, base, ok, QLocalePrivate::FailOnGroupSeparators);
 }
@@ -5474,11 +5468,14 @@ qint64 QString::toLongLong(bool *ok, int base) const
     begins with "0x", base 16 is used; if the string begins with "0",
     base 8 is used; otherwise, base 10 is used.
 
+    The string conversion will always happen in the 'C' locale. For locale
+    dependent conversion use QLocale::toULongLong()
+
     Example:
 
     \snippet doc/src/snippets/qstring/main.cpp 79
 
-    \sa number(), toLongLong()
+    \sa number(), toLongLong(), QLocale::toULongLong()
 */
 
 quint64 QString::toULongLong(bool *ok, int base) const
@@ -5490,15 +5487,6 @@ quint64 QString::toULongLong(bool *ok, int base) const
     }
 #endif
 
-    bool my_ok;
-    QLocale def_locale;
-    quint64 result = def_locale.d()->stringToUnsLongLong(*this, base, &my_ok, QLocalePrivate::FailOnGroupSeparators);
-    if (my_ok) {
-        if (ok != 0)
-            *ok = true;
-        return result;
-    }
-
     QLocale c_locale(QLocale::C);
     return c_locale.d()->stringToUnsLongLong(*this, base, ok, QLocalePrivate::FailOnGroupSeparators);
 }
@@ -5517,11 +5505,14 @@ quint64 QString::toULongLong(bool *ok, int base) const
     begins with "0x", base 16 is used; if the string begins with "0",
     base 8 is used; otherwise, base 10 is used.
 
+    The string conversion will always happen in the 'C' locale. For locale
+    dependent conversion use QLocale::toLong()
+
     Example:
 
     \snippet doc/src/snippets/qstring/main.cpp 73
 
-    \sa number(), toULong(), toInt()
+    \sa number(), toULong(), toInt(), QLocale::toLong()
 */
 
 long QString::toLong(bool *ok, int base) const
@@ -5549,11 +5540,14 @@ long QString::toLong(bool *ok, int base) const
     begins with "0x", base 16 is used; if the string begins with "0",
     base 8 is used; otherwise, base 10 is used.
 
+    The string conversion will always happen in the 'C' locale. For locale
+    dependent conversion use QLocale::toULong()
+
     Example:
 
     \snippet doc/src/snippets/qstring/main.cpp 78
 
-    \sa number()
+    \sa number(), QLocale::toULong()
 */
 
 ulong QString::toULong(bool *ok, int base) const
@@ -5580,11 +5574,14 @@ ulong QString::toULong(bool *ok, int base) const
     begins with "0x", base 16 is used; if the string begins with "0",
     base 8 is used; otherwise, base 10 is used.
 
+    The string conversion will always happen in the 'C' locale. For locale
+    dependent conversion use QLocale::toInt()
+
     Example:
 
     \snippet doc/src/snippets/qstring/main.cpp 72
 
-    \sa number(), toUInt(), toDouble()
+    \sa number(), toUInt(), toDouble(), QLocale::toInt()
 */
 
 int QString::toInt(bool *ok, int base) const
@@ -5610,11 +5607,14 @@ int QString::toInt(bool *ok, int base) const
     begins with "0x", base 16 is used; if the string begins with "0",
     base 8 is used; otherwise, base 10 is used.
 
+    The string conversion will always happen in the 'C' locale. For locale
+    dependent conversion use QLocale::toUInt()
+
     Example:
 
     \snippet doc/src/snippets/qstring/main.cpp 77
 
-    \sa number(), toInt()
+    \sa number(), toInt(), QLocale::toUInt()
 */
 
 uint QString::toUInt(bool *ok, int base) const
@@ -5640,11 +5640,14 @@ uint QString::toUInt(bool *ok, int base) const
     begins with "0x", base 16 is used; if the string begins with "0",
     base 8 is used; otherwise, base 10 is used.
 
+    The string conversion will always happen in the 'C' locale. For locale
+    dependent conversion use QLocale::toShort()
+
     Example:
 
     \snippet doc/src/snippets/qstring/main.cpp 76
 
-    \sa number(), toUShort(), toInt()
+    \sa number(), toUShort(), toInt(), QLocale::toShort()
 */
 
 short QString::toShort(bool *ok, int base) const
@@ -5670,11 +5673,14 @@ short QString::toShort(bool *ok, int base) const
     begins with "0x", base 16 is used; if the string begins with "0",
     base 8 is used; otherwise, base 10 is used.
 
+    The string conversion will always happen in the 'C' locale. For locale
+    dependent conversion use QLocale::toUShort()
+
     Example:
 
     \snippet doc/src/snippets/qstring/main.cpp 80
 
-    \sa number(), toShort()
+    \sa number(), toShort(), QLocale::toUShort()
 */
 
 ushort QString::toUShort(bool *ok, int base) const
@@ -5704,37 +5710,22 @@ ushort QString::toUShort(bool *ok, int base) const
 
     \snippet doc/src/snippets/qstring/main.cpp 67
 
-    This function tries to interpret the string according to the
-    current locale. The current locale is determined from the
-    system at application startup and can be changed by calling
-    QLocale::setDefault(). If the string cannot be interpreted
-    according to the current locale, this function falls back
-    on the "C" locale.
+    The string conversion will always happen in the 'C' locale. For locale
+    dependent conversion use QLocale::toDouble()
 
-    \snippet doc/src/snippets/qstring/main.cpp 69
-    \snippet doc/src/snippets/qstring/main.cpp 70
+    \snippet doc/src/snippets/qstring/main.cpp 68
 
-    Due to the ambiguity between the decimal point and thousands group
-    separator in various locales, this function does not handle
+    For historic reasons, this function does not handle
     thousands group separators. If you need to convert such numbers,
-    see QLocale::toDouble().
+    use QLocale::toDouble().
 
-    \snippet doc/src/snippets/qstring/main.cpp 68
+    \snippet doc/src/snippets/qstring/main.cpp 69
 
     \sa number() QLocale::setDefault() QLocale::toDouble() trimmed()
 */
 
 double QString::toDouble(bool *ok) const
 {
-    bool my_ok;
-    QLocale def_locale;
-    double result = def_locale.d()->stringToDouble(*this, &my_ok, QLocalePrivate::FailOnGroupSeparators);
-    if (my_ok) {
-        if (ok != 0)
-            *ok = true;
-        return result;
-    }
-
     QLocale c_locale(QLocale::C);
     return c_locale.d()->stringToDouble(*this, ok, QLocalePrivate::FailOnGroupSeparators);
 }
@@ -5745,11 +5736,14 @@ double QString::toDouble(bool *ok) const
     If a conversion error occurs, *\a{ok} is set to false; otherwise
     *\a{ok} is set to true. Returns 0.0 if the conversion fails.
 
+    The string conversion will always happen in the 'C' locale. For locale
+    dependent conversion use QLocale::toFloat()
+
     Example:
 
     \snippet doc/src/snippets/qstring/main.cpp 71
 
-    \sa number(), toDouble(), toInt()
+    \sa number(), toDouble(), toInt(), QLocale::toFloat()
 */
 
 #define QT_MAX_FLOAT 3.4028234663852886e+38
@@ -5851,8 +5845,9 @@ QString &QString::setNum(qulonglong n, int base)
     The \a format can be 'f', 'F', 'e', 'E', 'g' or 'G' (see the
     arg() function documentation for an explanation of the formats).
 
-    Unlike QLocale::toString(), this function doesn't honor the
-    user's locale settings.
+    The formatting always uses QLocale::C, i.e., English/UnitedStates.
+    To get a localized string representation of a number, use
+    QLocale::toString() with the appropriate locale.
 */
 
 QString &QString::setNum(double n, char f, int prec)
@@ -5893,6 +5888,10 @@ QString &QString::setNum(double n, char f, int prec)
     Sets the string to the printed value of \a n, formatted according
     to the given \a format and \a precision, and returns a reference
     to the string.
+
+    The formatting always uses QLocale::C, i.e., English/UnitedStates.
+    To get a localized string representation of a number, use
+    QLocale::toString() with the appropriate locale.
 */
 
 
@@ -5906,6 +5905,10 @@ QString &QString::setNum(double n, char f, int prec)
     and 36. For bases other than 10, \a n is treated as an
     unsigned integer.
 
+    The formatting always uses QLocale::C, i.e., English/UnitedStates.
+    To get a localized string representation of a number, use
+    QLocale::toString() with the appropriate locale.
+
     \snippet doc/src/snippets/qstring/main.cpp 35
 
     \sa setNum()
diff --git a/tests/auto/corelib/tools/qstring/tst_qstring.cpp b/tests/auto/corelib/tools/qstring/tst_qstring.cpp
index dae1dc45ba..3be7302223 100644
--- a/tests/auto/corelib/tools/qstring/tst_qstring.cpp
+++ b/tests/auto/corelib/tools/qstring/tst_qstring.cpp
@@ -3989,107 +3989,83 @@ void tst_QString::operator_smaller()
 
 void tst_QString::integer_conversion_data()
 {
-    QTest::addColumn<QString>("locale_name");
     QTest::addColumn<QString>("num_str");
     QTest::addColumn<int>("base");
     QTest::addColumn<bool>("good");
     QTest::addColumn<qlonglong>("num");
 
-    QTest::newRow("C empty 0")    << QString("C")  << QString("")    << 0   << false << (qlonglong)0;
-    QTest::newRow("C empty 8")    << QString("C")  << QString("")    << 8   << false << (qlonglong)0;
-    QTest::newRow("C empty 10")   << QString("C")  << QString("")    << 10  << false << (qlonglong)0;
-    QTest::newRow("C empty 16")   << QString("C")  << QString("")    << 16  << false << (qlonglong)0;
-
-    QTest::newRow("C null 0")     << QString("C")  << QString()  << 0   << false << (qlonglong)0;
-    QTest::newRow("C null 8")     << QString("C")  << QString()  << 8   << false << (qlonglong)0;
-    QTest::newRow("C null 10")    << QString("C")  << QString()  << 10  << false << (qlonglong)0;
-    QTest::newRow("C null 16")    << QString("C")  << QString()  << 16  << false << (qlonglong)0;
-
-    QTest::newRow("C   -0xf 0")       << QString("C")  << QString("  -0xf")    << 0  << true  << (qlonglong)-15;
-    QTest::newRow("C -0xf   0")       << QString("C")  << QString("-0xf  ")    << 0  << true  << (qlonglong)-15;
-    QTest::newRow("C \t0xf\t 0")      << QString("C")  << QString("\t0xf\t")   << 0  << true  << (qlonglong)15;
-    QTest::newRow("C   -010 0")       << QString("C")  << QString("  -010")    << 0  << true  << (qlonglong)-8;
-    QTest::newRow("C 010   0")        << QString("C")  << QString("010  ")     << 0  << true  << (qlonglong)8;
-    QTest::newRow("C \t-010\t 0")     << QString("C")  << QString("\t-010\t")  << 0  << true  << (qlonglong)-8;
-    QTest::newRow("C   123 10")       << QString("C")  << QString("  123")     << 10 << true  << (qlonglong)123;
-    QTest::newRow("C 123   10")       << QString("C")  << QString("123  ")     << 10 << true  << (qlonglong)123;
-    QTest::newRow("C \t123\t 10")     << QString("C")  << QString("\t123\t")   << 10 << true  << (qlonglong)123;
-    QTest::newRow("C   -0xf 16")      << QString("C")  << QString("  -0xf")    << 16 << true  << (qlonglong)-15;
-    QTest::newRow("C -0xf   16")      << QString("C")  << QString("-0xf  ")    << 16 << true  << (qlonglong)-15;
-    QTest::newRow("C \t0xf\t 16")     << QString("C")  << QString("\t0xf\t")   << 16 << true  << (qlonglong)15;
-
-    QTest::newRow("C -0 0")       << QString("C")  << QString("-0")  << 0   << true  << (qlonglong)0;
-    QTest::newRow("C -0 8")       << QString("C")  << QString("-0")  << 8   << true  << (qlonglong)0;
-    QTest::newRow("C -0 10")      << QString("C")  << QString("-0")  << 10  << true  << (qlonglong)0;
-    QTest::newRow("C -0 16")      << QString("C")  << QString("-0")  << 16  << true  << (qlonglong)0;
-
-    QTest::newRow("C 1.234 10")      << QString("C")     << QString("1.234") << 10 << false << (qlonglong)0;
-    QTest::newRow("C 1,234 10")      << QString("C")     << QString("1,234") << 10 << false << (qlonglong)0;
-    QTest::newRow("de_DE 1.234 10")  << QString("de_DE") << QString("1.234") << 10 << false << (qlonglong)0;
-    QTest::newRow("de_DE 1,234 10")  << QString("de_DE") << QString("1,234") << 10 << false << (qlonglong)0;
-
-    QTest::newRow("C 0x 0")    << QString("C")  << QString("0x") << 0  << false << (qlonglong)0;
-    QTest::newRow("C 0x 16")   << QString("C")  << QString("0x") << 16 << false << (qlonglong)0;
-
-    QTest::newRow("C 10 0")      << QString("C") << QString("10")    << 0  << true  << (qlonglong)10;
-    QTest::newRow("C 010 0")     << QString("C") << QString("010")   << 0  << true  << (qlonglong)8;
-    QTest::newRow("C 0x10 0")    << QString("C") << QString("0x10")  << 0  << true  << (qlonglong)16;
-    QTest::newRow("C 10 8")      << QString("C") << QString("10")    << 8  << true  << (qlonglong)8;
-    QTest::newRow("C 010 8")     << QString("C") << QString("010")   << 8  << true  << (qlonglong)8;
-    QTest::newRow("C 0x10 8")    << QString("C") << QString("0x10")  << 8  << false << (qlonglong)0;
-    QTest::newRow("C 10 10")     << QString("C") << QString("10")    << 10 << true  << (qlonglong)10;
-    QTest::newRow("C 010 10")    << QString("C") << QString("010")   << 10 << true  << (qlonglong)10;
-    QTest::newRow("C 0x10 10")   << QString("C") << QString("0x10")  << 10 << false << (qlonglong)0;
-    QTest::newRow("C 10 16")     << QString("C") << QString("10")    << 16 << true  << (qlonglong)16;
-    QTest::newRow("C 010 16")    << QString("C") << QString("010")   << 16 << true  << (qlonglong)16;
-    QTest::newRow("C 0x10 16")   << QString("C") << QString("0x10")  << 16 << true  << (qlonglong)16;
-
-    QTest::newRow("de_DE 10 0")      << QString("de_DE") << QString("10")    << 0  << true  << (qlonglong)10;
-    QTest::newRow("de_DE 010 0")     << QString("de_DE") << QString("010")   << 0  << true  << (qlonglong)8;
-    QTest::newRow("de_DE 0x10 0")    << QString("de_DE") << QString("0x10")  << 0  << true  << (qlonglong)16;
-    QTest::newRow("de_DE 10 8")      << QString("de_DE") << QString("10")    << 8  << true  << (qlonglong)8;
-    QTest::newRow("de_DE 010 8")     << QString("de_DE") << QString("010")   << 8  << true  << (qlonglong)8;
-    QTest::newRow("de_DE 0x10 8")    << QString("de_DE") << QString("0x10")  << 8  << false << (qlonglong)0;
-    QTest::newRow("de_DE 10 10")     << QString("de_DE") << QString("10")    << 10 << true  << (qlonglong)10;
-    QTest::newRow("de_DE 010 10")    << QString("de_DE") << QString("010")   << 10 << true  << (qlonglong)10;
-    QTest::newRow("de_DE 0x10 10")   << QString("de_DE") << QString("0x10")  << 10 << false << (qlonglong)0;
-    QTest::newRow("de_DE 10 16")     << QString("de_DE") << QString("10")    << 16 << true  << (qlonglong)16;
-    QTest::newRow("de_DE 010 16")    << QString("de_DE") << QString("010")   << 16 << true  << (qlonglong)16;
-    QTest::newRow("de_DE 0x10 16")   << QString("de_DE") << QString("0x10")  << 16 << true  << (qlonglong)16;
-
-    QTest::newRow("C -10 0")      << QString("C") << QString("-10")    << 0  << true  << (qlonglong)-10;
-    QTest::newRow("C -010 0")     << QString("C") << QString("-010")   << 0  << true  << (qlonglong)-8;
-    QTest::newRow("C -0x10 0")    << QString("C") << QString("-0x10")  << 0  << true  << (qlonglong)-16;
-    QTest::newRow("C -10 8")      << QString("C") << QString("-10")    << 8  << true  << (qlonglong)-8;
-    QTest::newRow("C -010 8")     << QString("C") << QString("-010")   << 8  << true  << (qlonglong)-8;
-    QTest::newRow("C -0x10 8")    << QString("C") << QString("-0x10")  << 8  << false << (qlonglong)0;
-    QTest::newRow("C -10 10")     << QString("C") << QString("-10")    << 10 << true  << (qlonglong)-10;
-    QTest::newRow("C -010 10")    << QString("C") << QString("-010")   << 10 << true  << (qlonglong)-10;
-    QTest::newRow("C -0x10 10")   << QString("C") << QString("-0x10")  << 10 << false << (qlonglong)0;
-    QTest::newRow("C -10 16")     << QString("C") << QString("-10")    << 16 << true  << (qlonglong)-16;
-    QTest::newRow("C -010 16")    << QString("C") << QString("-010")   << 16 << true  << (qlonglong)-16;
-    QTest::newRow("C -0x10 16")   << QString("C") << QString("-0x10")  << 16 << true  << (qlonglong)-16;
+    QTest::newRow("C empty 0")      << QString("")         << 0  << false << (qlonglong)0;
+    QTest::newRow("C empty 8")      << QString("")         << 8  << false << (qlonglong)0;
+    QTest::newRow("C empty 10")     << QString("")         << 10 << false << (qlonglong)0;
+    QTest::newRow("C empty 16")     << QString("")         << 16 << false << (qlonglong)0;
+
+    QTest::newRow("C null 0")       << QString()           << 0  << false << (qlonglong)0;
+    QTest::newRow("C null 8")       << QString()           << 8  << false << (qlonglong)0;
+    QTest::newRow("C null 10")      << QString()           << 10 << false << (qlonglong)0;
+    QTest::newRow("C null 16")      << QString()           << 16 << false << (qlonglong)0;
+
+    QTest::newRow("C   -0xf 0")     << QString("  -0xf")   << 0  << true  << (qlonglong)-15;
+    QTest::newRow("C -0xf   0")     << QString("-0xf  ")   << 0  << true  << (qlonglong)-15;
+    QTest::newRow("C \t0xf\t 0")    << QString("\t0xf\t")  << 0  << true  << (qlonglong)15;
+    QTest::newRow("C   -010 0")     << QString("  -010")   << 0  << true  << (qlonglong)-8;
+    QTest::newRow("C 010   0")      << QString("010  ")    << 0  << true  << (qlonglong)8;
+    QTest::newRow("C \t-010\t 0")   << QString("\t-010\t") << 0  << true  << (qlonglong)-8;
+    QTest::newRow("C   123 10")     << QString("  123")    << 10 << true  << (qlonglong)123;
+    QTest::newRow("C 123   10")     << QString("123  ")    << 10 << true  << (qlonglong)123;
+    QTest::newRow("C \t123\t 10")   << QString("\t123\t")  << 10 << true  << (qlonglong)123;
+    QTest::newRow("C   -0xf 16")    << QString("  -0xf")   << 16 << true  << (qlonglong)-15;
+    QTest::newRow("C -0xf   16")    << QString("-0xf  ")   << 16 << true  << (qlonglong)-15;
+    QTest::newRow("C \t0xf\t 16")   << QString("\t0xf\t")  << 16 << true  << (qlonglong)15;
+
+    QTest::newRow("C -0 0")         << QString("-0")       << 0   << true << (qlonglong)0;
+    QTest::newRow("C -0 8")         << QString("-0")       << 8   << true << (qlonglong)0;
+    QTest::newRow("C -0 10")        << QString("-0")       << 10  << true << (qlonglong)0;
+    QTest::newRow("C -0 16")        << QString("-0")       << 16  << true << (qlonglong)0;
+
+    QTest::newRow("C 1.234 10")     << QString("1.234")    << 10 << false << (qlonglong)0;
+    QTest::newRow("C 1,234 10")     << QString("1,234")    << 10 << false << (qlonglong)0;
+
+    QTest::newRow("C 0x 0")         << QString("0x")       << 0  << false << (qlonglong)0;
+    QTest::newRow("C 0x 16")        << QString("0x")       << 16 << false << (qlonglong)0;
+
+    QTest::newRow("C 10 0")         << QString("10")       << 0  << true  << (qlonglong)10;
+    QTest::newRow("C 010 0")        << QString("010")      << 0  << true  << (qlonglong)8;
+    QTest::newRow("C 0x10 0")       << QString("0x10")     << 0  << true  << (qlonglong)16;
+    QTest::newRow("C 10 8")         << QString("10")       << 8  << true  << (qlonglong)8;
+    QTest::newRow("C 010 8")        << QString("010")      << 8  << true  << (qlonglong)8;
+    QTest::newRow("C 0x10 8")       << QString("0x10")     << 8  << false << (qlonglong)0;
+    QTest::newRow("C 10 10")        << QString("10")       << 10 << true  << (qlonglong)10;
+    QTest::newRow("C 010 10")       << QString("010")      << 10 << true  << (qlonglong)10;
+    QTest::newRow("C 0x10 10")      << QString("0x10")     << 10 << false << (qlonglong)0;
+    QTest::newRow("C 10 16")        << QString("10")       << 16 << true  << (qlonglong)16;
+    QTest::newRow("C 010 16")       << QString("010")      << 16 << true  << (qlonglong)16;
+    QTest::newRow("C 0x10 16")      << QString("0x10")     << 16 << true  << (qlonglong)16;
+
+    QTest::newRow("C -10 0")        << QString("-10")      << 0  << true  << (qlonglong)-10;
+    QTest::newRow("C -010 0")       << QString("-010")     << 0  << true  << (qlonglong)-8;
+    QTest::newRow("C -0x10 0")      << QString("-0x10")    << 0  << true  << (qlonglong)-16;
+    QTest::newRow("C -10 8")        << QString("-10")      << 8  << true  << (qlonglong)-8;
+    QTest::newRow("C -010 8")       << QString("-010")     << 8  << true  << (qlonglong)-8;
+    QTest::newRow("C -0x10 8")      << QString("-0x10")    << 8  << false << (qlonglong)0;
+    QTest::newRow("C -10 10")       << QString("-10")      << 10 << true  << (qlonglong)-10;
+    QTest::newRow("C -010 10")      << QString("-010")     << 10 << true  << (qlonglong)-10;
+    QTest::newRow("C -0x10 10")     << QString("-0x10")    << 10 << false << (qlonglong)0;
+    QTest::newRow("C -10 16")       << QString("-10")      << 16 << true  << (qlonglong)-16;
+    QTest::newRow("C -010 16")      << QString("-010")     << 16 << true  << (qlonglong)-16;
+    QTest::newRow("C -0x10 16")     << QString("-0x10")    << 16 << true  << (qlonglong)-16;
 
     // Let's try some Arabic
     const quint16 arabic_str[] = { 0x0661, 0x0662, 0x0663, 0x0664, 0x0000 }; // "1234"
-    QTest::newRow("ar_SA 1234 0")  << QString("ar_SA") << QString::fromUtf16(arabic_str)  << 0  << true << (qlonglong)1234;
-    QTest::newRow("ar_SA 1234 8")  << QString("ar_SA") << QString::fromUtf16(arabic_str)  << 8  << true << (qlonglong)668;
-    QTest::newRow("ar_SA 1234 10") << QString("ar_SA") << QString::fromUtf16(arabic_str)  << 10 << true << (qlonglong)1234;
-    QTest::newRow("ar_SA 1234 16") << QString("ar_SA") << QString::fromUtf16(arabic_str)  << 16 << true << (qlonglong)4660;
+    QTest::newRow("ar_SA 1234 0")  << QString::fromUtf16(arabic_str)  << 0  << false << (qlonglong)0;
 }
 
 void tst_QString::integer_conversion()
 {
-    QFETCH(QString, locale_name);
     QFETCH(QString, num_str);
     QFETCH(int, base);
     QFETCH(bool, good);
     QFETCH(qlonglong, num);
 
-
-    QLocale::setDefault(locale_name);
-    QCOMPARE(QLocale().name(), locale_name);
-
     bool ok;
     qlonglong d = num_str.toLongLong(&ok, base);
     QCOMPARE(ok, good);
@@ -4097,100 +4073,65 @@ void tst_QString::integer_conversion()
     if (ok) {
         QCOMPARE(d, num);
     }
-
-    QLocale::setDefault(QLocale::C);
 }
 
 void tst_QString::double_conversion_data()
 {
-    QTest::addColumn<QString>("locale_name");
     QTest::addColumn<QString>("num_str");
     QTest::addColumn<bool>("good");
     QTest::addColumn<double>("num");
 
     // The good...
 
-    QTest::newRow("C 1")         << QString("C") << QString("1")          << true  << 1.0;
-    QTest::newRow("C 1.0")       << QString("C") << QString("1.0")        << true  << 1.0;
-    QTest::newRow("C 1.234")     << QString("C") << QString("1.234")      << true  << 1.234;
-    QTest::newRow("C 1.234e-10") << QString("C") << QString("1.234e-10")  << true  << 1.234e-10;
-    QTest::newRow("C 1.234E10")  << QString("C") << QString("1.234E10")   << true  << 1.234e10;
-    QTest::newRow("C 1e10")      << QString("C") << QString("1e10")       << true  << 1.0e10;
+    QTest::newRow("C 1")             << QString("1")          << true  << 1.0;
+    QTest::newRow("C 1.0")           << QString("1.0")        << true  << 1.0;
+    QTest::newRow("C 1.234")         << QString("1.234")      << true  << 1.234;
+    QTest::newRow("C 1.234e-10")     << QString("1.234e-10")  << true  << 1.234e-10;
+    QTest::newRow("C 1.234E10")      << QString("1.234E10")   << true  << 1.234e10;
+    QTest::newRow("C 1e10")          << QString("1e10")       << true  << 1.0e10;
 
     // The bad...
 
-    QTest::newRow("C empty")     << QString("C") << QString("")           << false << 0.0;
-    QTest::newRow("C null")      << QString("C") << QString()         << false << 0.0;
-    QTest::newRow("C .")         << QString("C") << QString(".")          << false << 0.0;
-    QTest::newRow("C 1e")        << QString("C") << QString("1e")         << false << 0.0;
-    QTest::newRow("C 1,")        << QString("C") << QString("1,")         << false << 0.0;
-    QTest::newRow("C 1,0")       << QString("C") << QString("1,0")        << false << 0.0;
-    QTest::newRow("C 1,000")     << QString("C") << QString("1,000")      << false << 0.0;
-    QTest::newRow("C 1e1.0")     << QString("C") << QString("1e1.0")      << false << 0.0;
-    QTest::newRow("C 1e+")       << QString("C") << QString("1e+")        << false << 0.0;
-    QTest::newRow("C 1e-")       << QString("C") << QString("1e-")        << false << 0.0;
+    QTest::newRow("C empty")         << QString("")           << false << 0.0;
+    QTest::newRow("C null")          << QString()             << false << 0.0;
+    QTest::newRow("C .")             << QString(".")          << false << 0.0;
+    QTest::newRow("C 1e")            << QString("1e")         << false << 0.0;
+    QTest::newRow("C 1,")            << QString("1,")         << false << 0.0;
+    QTest::newRow("C 1,0")           << QString("1,0")        << false << 0.0;
+    QTest::newRow("C 1,000")         << QString("1,000")      << false << 0.0;
+    QTest::newRow("C 1e1.0")         << QString("1e1.0")      << false << 0.0;
+    QTest::newRow("C 1e+")           << QString("1e+")        << false << 0.0;
+    QTest::newRow("C 1e-")           << QString("1e-")        << false << 0.0;
+    QTest::newRow("de_DE 1,0")       << QString("1,0")        << false << 0.0;
+    QTest::newRow("de_DE 1,234")     << QString("1,234")      << false << 0.0;
+    QTest::newRow("de_DE 1,234e-10") << QString("1,234e-10")  << false << 0.0;
+    QTest::newRow("de_DE 1,234E10")  << QString("1,234E10")   << false << 0.0;
 
     // And the ugly...
 
-    QTest::newRow("C .1")        << QString("C") << QString(".1")         << true  << 0.1;
-    QTest::newRow("C -.1")       << QString("C") << QString("-.1")        << true  << -0.1;
-    QTest::newRow("C 1.")        << QString("C") << QString("1.")         << true  << 1.0;
-    QTest::newRow("C 1.E10")     << QString("C") << QString("1.E10")      << true  << 1.0e10;
-    QTest::newRow("C 1e+10")     << QString("C") << QString("1e+10")      << true  << 1.0e+10;
-
-    QTest::newRow("de_DE 1")         << QString("de_DE") << QString("1")          << true  << 1.0;
-    QTest::newRow("de_DE 1.0")       << QString("de_DE") << QString("1.0")        << true  << 1.0;
-    QTest::newRow("de_DE 1.234")     << QString("de_DE") << QString("1.234")      << true  << 1.234;
-    QTest::newRow("de_DE 1.234e-10") << QString("de_DE") << QString("1.234e-10")  << true  << 1.234e-10;
-    QTest::newRow("de_DE 1.234E10")  << QString("de_DE") << QString("1.234E10")   << true  << 1.234e10;
-    QTest::newRow("de_DE 1e10")      << QString("de_DE") << QString("1e10")       << true  << 1.0e10;
-    QTest::newRow("de_DE .1")        << QString("de_DE") << QString(".1")         << true  << 0.1;
-    QTest::newRow("de_DE -.1")       << QString("de_DE") << QString("-.1")        << true  << -0.1;
-    QTest::newRow("de_DE 1.")        << QString("de_DE") << QString("1.")         << true  << 1.0;
-    QTest::newRow("de_DE 1.E10")     << QString("de_DE") << QString("1.E10")      << true  << 1.0e10;
-    QTest::newRow("de_DE 1e+10")     << QString("de_DE") << QString("1e+10")      << true  << 1.0e+10;
-
-    QTest::newRow("de_DE 1,0")       << QString("de_DE") << QString("1,0")        << true  << 1.0;
-    QTest::newRow("de_DE 1,234")     << QString("de_DE") << QString("1,234")      << true  << 1.234;
-    QTest::newRow("de_DE 1,234e-10") << QString("de_DE") << QString("1,234e-10")  << true  << 1.234e-10;
-    QTest::newRow("de_DE 1,234E10")  << QString("de_DE") << QString("1,234E10")   << true  << 1.234e10;
-    QTest::newRow("de_DE ,1")        << QString("de_DE") << QString(",1")         << true  << 0.1;
-    QTest::newRow("de_DE -,1")       << QString("de_DE") << QString("-,1")        << true  << -0.1;
-    QTest::newRow("de_DE 1,")        << QString("de_DE") << QString("1,")         << true  << 1.0;
-    QTest::newRow("de_DE 1,E10")     << QString("de_DE") << QString("1,E10")      << true  << 1.0e10;
-
-    QTest::newRow("de_DE empty")     << QString("de_DE") << QString("")           << false << 0.0;
-    QTest::newRow("de_DE null")      << QString("de_DE") << QString()         << false << 0.0;
-    QTest::newRow("de_DE .")         << QString("de_DE") << QString(".")          << false << 0.0;
-    QTest::newRow("de_DE 1e")        << QString("de_DE") << QString("1e")         << false << 0.0;
-    QTest::newRow("de_DE 1e1.0")     << QString("de_DE") << QString("1e1.0")      << false << 0.0;
-    QTest::newRow("de_DE 1e+")       << QString("de_DE") << QString("1e+")        << false << 0.0;
-    QTest::newRow("de_DE 1e-")       << QString("de_DE") << QString("1e-")        << false << 0.0;
-
-    QTest::newRow("C   1")           << QString("C")     << QString("  1")        << true  << 1.0;
-    QTest::newRow("C 1  ")           << QString("C")     << QString("1  ")        << true  << 1.0;
-    QTest::newRow("de_DE  1")        << QString("de_DE") << QString(" 1")         << true  << 1.0;
-    QTest::newRow("de_DE 1 ")        << QString("de_DE") << QString("1 ")         << true  << 1.0;
+    QTest::newRow("C .1")            << QString(".1")         << true  << 0.1;
+    QTest::newRow("C -.1")           << QString("-.1")        << true  << -0.1;
+    QTest::newRow("C 1.")            << QString("1.")         << true  << 1.0;
+    QTest::newRow("C 1.E10")         << QString("1.E10")      << true  << 1.0e10;
+    QTest::newRow("C 1e+10")         << QString("1e+10")      << true  << 1.0e+10;
+    QTest::newRow("C   1")           << QString("  1")        << true  << 1.0;
+    QTest::newRow("C 1  ")           << QString("1  ")        << true  << 1.0;
 
     // Let's try some Arabic
     const quint16 arabic_str[] = { 0x0660, 0x066B, 0x0661, 0x0662,
                                     0x0663, 0x0664, 0x0065, 0x0662,
                                     0x0000 };                            // "0.1234e2"
-    QTest::newRow("ar_SA") << QString("ar_SA") << QString::fromUtf16(arabic_str) << true << 0.1234e2;
+    QTest::newRow("ar_SA") << QString::fromUtf16(arabic_str) << false << 0.0;
 }
 
 void tst_QString::double_conversion()
 {
 #define MY_DOUBLE_EPSILON (2.22045e-16)
 
-    QFETCH(QString, locale_name);
     QFETCH(QString, num_str);
     QFETCH(bool, good);
     QFETCH(double, num);
 
-    QLocale::setDefault(locale_name);
-    QCOMPARE(QLocale().name(), locale_name);
-
     bool ok;
     double d = num_str.toDouble(&ok);
     QCOMPARE(ok, good);
@@ -4201,8 +4142,6 @@ void tst_QString::double_conversion()
             diff = -diff;
         QVERIFY(diff <= MY_DOUBLE_EPSILON);
     }
-
-    QLocale::setDefault(QLocale::C);
 }
 
 #ifndef Q_MOC_RUN