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* Merge remote-tracking branch 'origin/5.14' into 5.15Qt Forward Merge Bot2020-01-131-18/+26
|\ | | | | | | Change-Id: I50f70a789ab1438b40d4408be72c090fa00b801f
| * QString::isLower/isUpper: redo the implementationGiuseppe D'Angelo2020-01-111-18/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use QStringIterator rather than indexed loops. This fixes handling of non-BMP code points (which may be lower or uppercase, see the test). Change also the semantics of the functions, adopting Unicode ยง3.13 definitions: a string is lowercase/uppercase if it's equal to its own toLower/toUpper folding. As a side effect, empty strings are now correctly reported to be lowercase AND uppercase. [ChangeLog][Important Behavior Changes] The semantics of QString::isLower() and QString::isUpper() have been changed to match the Unicode specification. Now lowercase (resp. uppercase) strings are allowed to contain any character; a string is considered lowercase (resp. uppercase) if it's equal to its own toLower() (resp. toUpper()) folding. Previously, a non-letter character would make the string not lowercase nor uppercase, and the mere presence of an uppercase (resp. lowercase) letter would make isLower() (resp. isUpper()) return false, even if the letter wouldn't change under case folding. As a consequence, now empty strings are lowercase and uppercase. [ChangeLog][QtCore][QString] Fixed a number of bugs of QString::isLower() and QString::isUpper(). Empty strings are now correctly reported to be lowercase (resp. uppercase), and strings containing code points outside the BMP are now correctly handled. Note that the behavior of these functions has also been changed. Change-Id: Iba1398279a072399a9f21295fe75f6e414f3f813 Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
* | Merge remote-tracking branch 'origin/5.14' into 5.15Liang Qi2020-01-091-4/+4
|\| | | | | | | | | | | | | Conflicts: src/corelib/kernel/qobject.cpp Change-Id: I4780b25665672692b086ee92092e506c814642f2
| * ucstrncmp: Fix UBSan report of array overflowingThiago Macieira2020-01-091-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The expression "a + offset + N" will eventually calculate an address past the end of a, since we are comparing to end. That's undefined behavior. Instead, calculate end - a and compare that to offset + N. This commit subtracts "a" from both sides of the inequalities and swaps the two sides to make them obey Qt coding style. Testing with GCC 9 (which is the only one I care about) shows the compiler generates the same code. Fixes: QTBUG-81218 Change-Id: Id84da383373844f3a4b0fffd15e7c1ab904daccd Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
* | Introduce QString(View)::isValidUtf16Giuseppe D'Angelo2019-12-201-0/+29
|/ | | | | | | | | | | | | | | | | | | QString(View)s can be built or manipulated in ways that make them contain/refer to improperly encoded UTF-16 data. Problem is, we don't have public APIs to check whether a string contains valid UTF-16. This knowledge is precious if the string is to be fed in algorithms, regular expressions, etc. that expect validated input (e.g. QRegularExpression can be faster if it can assume valid UTF-16, otherwise it has to employ extra checks). Add a function that does the validation. [ChangeLog][QtCore][QStringView] Added QStringView::isValidUtf16. [ChangeLog][QtCore][QString] Added QString::isValidUtf16. Change-Id: Idd699183f6ec08013046c76c6a5a7c524b6c6fbc Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
* Optimize qLastIndexOf<QString> to not detach the QStringDavid Faure2019-12-051-2/+5
| | | | | | | | | | | | | | | | The call to data() on a non-const QString led to a detach(), which is unexpected and unwanted from QString::lastIndexOf() const. Found by looking at why QFileSystemEntry::fileName() was expensive, in the hotspot profiler. The solution is to instanciate QLastIndexOf with QStringView() rather than QString(). I added a deleted QString overload to make sure nobody ever instanciates it with a QString argument again. Change-Id: I06a1b2f937425e83f0779eb215e099aef78c50a7 Reviewed-by: Anton Kudryavtsev <antkudr@mail.ru> Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
* QUnicodeTables: use array for case folding tablesMarc Mutz2019-09-041-15/+15
| | | | | | | | | | | | | | | | | Instead of four pairs of :1 :15 bit fields, use an array of four :1, :15 structs. This allows to replace the case folding traits classes with a simple enum that indexes into said array. I don't know what the WASM #ifdef'ed code is supposed to effect (a :0 bit-field is only useful to separate adjacent bit-field into separate memory locations for multi-threading), but I thought it safer to leave it in, and that means the array must be a 64-bit block of its own, so I had to move two fields around. Saves ~4.5KiB in text size on optimized GCC 10 LTO Linux AMD64 builds. Change-Id: Ib52cd7706342d5227b50b57545d073829c45da9a Reviewed-by: Lars Knoll <lars.knoll@qt.io>
* Merge remote-tracking branch 'origin/5.13' into 5.14Liang Qi2019-09-041-2/+2
| | | | | | | | | | | Conflicts: src/corelib/codecs/qicucodec.cpp src/dbus/qdbusserver.cpp src/gui/painting/qbezier.cpp src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmscreen.cpp src/plugins/printsupport/cups/qppdprintdevice.cpp Change-Id: I2703128bb64baf5580fbc2c2061b55b0f0611d2a
* qstringalgorithms.h: add pure, noexcept, constexprMarc Mutz2019-07-291-1/+1
| | | | | | | ... where they were missing. Change-Id: I58c32e57675b5d5ee500722933ef4a356a679e46 Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
* Merge remote-tracking branch 'origin/5.13' into devQt Forward Merge Bot2019-07-121-2/+2
| | | | Change-Id: Icaabf08f9af539ddf844d96bc9c3a2d09408ba8a
* Move text-related code out of corelib/tools/ to corelib/text/Edward Welbourne2019-07-101-0/+12592
This includes byte array, string, char, unicode, locale, collation and regular expressions. Change-Id: I8b125fa52c8c513eb57a0f1298b91910e5a0d786 Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
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