diff options
Diffstat (limited to 'src/corelib/tools/qstring.cpp')
| -rw-r--r-- | src/corelib/tools/qstring.cpp | 76 |
1 files changed, 12 insertions, 64 deletions
diff --git a/src/corelib/tools/qstring.cpp b/src/corelib/tools/qstring.cpp index d0c5506228..e73c52980f 100644 --- a/src/corelib/tools/qstring.cpp +++ b/src/corelib/tools/qstring.cpp @@ -96,10 +96,6 @@ QT_BEGIN_NAMESPACE -#ifndef QT_NO_TEXTCODEC -QTextCodec *QString::codecForCStrings; -#endif - #ifdef QT_USE_ICU // qlocale_icu.cpp extern bool qt_ucol_strcoll(const QChar *source, int sourceLength, const QChar *target, int targetLength, int *result); @@ -471,9 +467,8 @@ const QString::Null QString::null = { }; \snippet doc/src/snippets/qstring/main.cpp 0 QString converts the \c{const char *} data into Unicode using the - fromAscii() function. By default, fromAscii() treats character - above 128 as Latin-1 characters, but this can be changed by - calling QTextCodec::setCodecForCStrings(). + fromAscii() function. fromAscii() treats ordinals above 128 as Latin-1 + characters. In all of the QString functions that take \c{const char *} parameters, the \c{const char *} is interpreted as a classic @@ -611,9 +606,7 @@ const QString::Null QString::null = { }; toLatin1(), toUtf8(), and toLocal8Bit(). \list - \o toAscii() returns an 8-bit string encoded using the codec - specified by QTextCodec::codecForCStrings (by default, that is - Latin 1). + \o toAscii() returns a Latin-1 (ISO 8859-1) encoded 8-bit string. \o toLatin1() returns a Latin-1 (ISO 8859-1) encoded 8-bit string. \o toUtf8() returns a UTF-8 encoded 8-bit string. UTF-8 is a superset of US-ASCII (ANSI X3.4-1986) that supports the entire @@ -721,11 +714,11 @@ const QString::Null QString::null = { }; \section1 More Efficient String Construction Many strings are known at compile time. But the trivial - constructor QString("Hello"), will convert the string literal - to a QString using the codecForCStrings(). To avoid this one - can use the QStringLiteral macro to directly create the required - data at compile time. Constructing a QString out of the literal - does then not cause any overhead at runtime. + constructor QString("Hello"), will copy the contents of the string, + treating the contents as Latin-1. To avoid this one can use the + QStringLiteral macro to directly create the required data at compile + time. Constructing a QString out of the literal does then not cause + any overhead at runtime. A slightly less efficient way is to use QLatin1String. This class wraps a C string literal, precalculates it length at compile time and can @@ -3658,9 +3651,7 @@ QByteArray QString::toLatin1() const /*! Returns an 8-bit representation of the string as a QByteArray. - If a codec has been set using QTextCodec::setCodecForCStrings(), - it is used to convert Unicode to 8-bit char; otherwise this - function does the same as toLatin1(). + This function does the same as toLatin1(). Note that, despite the name, this function does not necessarily return an US-ASCII (ANSI X3.4-1986) string and its result may not be US-ASCII compatible. @@ -3669,10 +3660,6 @@ QByteArray QString::toLatin1() const */ QByteArray QString::toAscii() const { -#ifndef QT_NO_TEXTCODEC - if (codecForCStrings) - return codecForCStrings->fromUnicode(*this); -#endif // QT_NO_TEXTCODEC return toLatin1(); } @@ -3806,23 +3793,6 @@ QString::Data *QString::fromLatin1_helper(const char *str, int size) QString::Data *QString::fromAscii_helper(const char *str, int size) { -#ifndef QT_NO_TEXTCODEC - if (codecForCStrings) { - Data *d; - if (!str) { - d = const_cast<Data *>(&shared_null.str); - } else if (size == 0 || (!*str && size < 0)) { - d = const_cast<Data *>(&shared_empty.str); - } else { - if (size < 0) - size = qstrlen(str); - QString s = codecForCStrings->toUnicode(str, size); - d = s.d; - d->ref.ref(); - } - return d; - } -#endif return fromLatin1_helper(str, size); } @@ -3871,11 +3841,7 @@ QString QString::fromLocal8Bit_helper(const char *str, int size) If \a size is -1 (default), it is taken to be strlen(\a str). - Note that, despite the name, this function actually uses the codec - defined by QTextCodec::setCodecForCStrings() to convert \a str to - Unicode. Depending on the codec, it may not accept valid US-ASCII (ANSI - X3.4-1986) input. If no codec has been set, this function does the same - as fromLatin1(). + This function does the same as fromLatin1(). \sa toAscii(), fromLatin1(), fromUtf8(), fromLocal8Bit() */ @@ -5144,19 +5110,8 @@ QString &QString::vsprintf(const char* cformat, va_list ap) const char *c = cformat; for (;;) { // Copy non-escape chars to result -#ifndef QT_NO_TEXTCODEC - int i = 0; - while (*(c + i) != '\0' && *(c + i) != '%') - ++i; - if (codecForCStrings) - result.append(codecForCStrings->toUnicode(c, i)); - else - result.append(fromLatin1(c, i)); - c += i; -#else while (*c != '\0' && *c != '%') result.append(QLatin1Char(*c++)); -#endif if (*c == '\0') break; @@ -7068,8 +7023,7 @@ bool QString::isRightToLeft() const This operator is mostly useful to pass a QString to a function that accepts a std::string object. - If the QString contains Unicode characters that the - QTextCodec::codecForCStrings() codec cannot handle, using this operator + If the QString contains non-Latin1 Unicode characters, using this can lead to loss of information. This operator is only available if Qt is configured with STL @@ -8742,9 +8696,7 @@ QByteArray QStringRef::toLatin1() const Returns an 8-bit representation of the string as a QByteArray. - If a codec has been set using QTextCodec::setCodecForCStrings(), - it is used to convert Unicode to 8-bit char; otherwise this - function does the same as toLatin1(). + This function does the same as toLatin1(). Note that, despite the name, this function does not necessarily return an US-ASCII (ANSI X3.4-1986) string and its result may not be US-ASCII compatible. @@ -8753,10 +8705,6 @@ QByteArray QStringRef::toLatin1() const */ QByteArray QStringRef::toAscii() const { -#ifndef QT_NO_TEXTCODEC - if (QString::codecForCStrings) - return QString::codecForCStrings->fromUnicode(unicode(), length()); -#endif // QT_NO_TEXTCODEC return toLatin1(); } |