Just so it's closer to the code that does the inverse.
Change-Id: Iecaab20adad2cb7f4a55818c687aecc76f0523e7
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Amazing how many places had the conversion duplicated. When compiling
with GCC under -O3 (which enables -ftree-vectorize), GCC would use SIMD
by using the PMOVZXBW instruction, but only if the -msse4.1 was passed
(or equivalent -march= switch), which almost no one did.
Also, the two lastIndexOf and the qt_find_latin1_string updates are also
fixing bugs because the old code forgot to cast the input to uchar
first. That meant the compiler was generating sign-extension from 8 to
16 bits, as opposed to zero-extension.
Change-Id: I4e2430a51dfc337994834524d3540382157509ef
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
We have quite a few versions of this code in qstring.cpp, which means
that it's hard to optimize them all. Instead, create two functions to
do the comparisons, one case-sensitive (ucstrncmp & ucstrcmp) and one
case-insensitive (ucstricmp).
Change-Id: I55c6588ade160bc8d16e19727b8f3dca523b38bf
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
This updates only the case-sensitive searching. The case-insensitive
part requires quite a few Unicode transformations.
The benchmarks tried are the plain word-by-word comparison used in Qt
5.2 and in builds without SSE2; the SSE2 benchmark; a benchmark using
the SSE4.2 "strchr" instruction. I've run the benchmark both for CPU
cyles used as well as bytes/sec scanning strings.
Improvement over the Qt 5.2 code:
GCC 4.7 GCC 4.9 Clang 3.4 ICC 14
cycles MB/s cycles MB/s cycles MB/s cycles MB/s
SSE2 2.1x 2.9x 2.2x 2.9x 2.1x 3.1x 2.2x 3.1x
SSE4.2 1.5x 1.7x 1.5x 1.7x 1.5x 1.7x 1.6x 1.8x
Once again, the SSE4.2 instruction wasn't as effective as I'd hoped
(not to mention that Clang seems to have some bugs emitting it).
Change-Id: I57c6e65e91791bb5265965cbd1af7fbd8fe7f588
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
qMemEquals is the same as ucstrncmp and checking that the comparison
was 0, so implement it like that. Meanwhile, it already had code for
doing 32-bit comparisons in the absence of higher SIMD optimizations,
which we can now make use of.
Change-Id: If26b446856e3b756efabc98b471fcdc344a8e732
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
The benchmarks showed that the basic SSE2-based building block
improves performance by about 50% with data extracted from a Qt
Creator run. None of the other alternatives provide clear better
results -- the best was 3.8% and with only one compiler.
Change-Id: I77314785afecfacaf21c41fd79c97cadf357f895
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Changed MIPS DSP portion of the mkspecs/features/simd.prf file in order
to fix the corrupted build system for MIPS platforms.
List of the additionally optimized functions
from file src/gui/painting/qdrawhelper.cpp:
- qt_blend_rgb16_on_rgb16
- qt_fetchUntransformed_888
- qt_fetchUntransformed_444
- qt_fetchUntransformed_argb8565
from file src/gui/image/qimage.cpp:
- convert_ARGB_to_ARGB_PM_inplace
from file src/corelib/qstring.cpp:
- ucstrncmp
- toLatin1_helper
- fromLatin1_helper
Change-Id: I5c47a69784917eee29a8dbd2718828a390b27c93
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Like before, this is taken from the existing QUrl code and is optimized for
ASCII handling (for the same reasons). And like previously, make
QString::fromUtf8 use a stateless version of the codec, which is faster.
There's a small change in behavior in the decoding: we insert a U+FFFD for
each byte that cannot be decoded properly. Previously, it would "eat" all bad
high-bit bytes and replace them all with one single U+FFFD. Either behavior is
allowed by the UTF-8 specifications, even though this new behavior will cause
misalignment in the Bradley Kuhn sample UTF-8 text.
Change-Id: Ib1b1f0b4291293bab345acaf376e00204ed87565
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This is a new and faster UTF-8 encoder, based on the code from QUrl. This code
specializes for ASCII, which is the most common case anyway, especially since
QString's "ascii" mode is actually UTF-8 now.
In addition, make QString::toUtf8 use a stateless encoder. Stateless means that
the function doesn't handle state between calls in the form of
QTextCodec::ConverterState. This allows it to be faster than otherwise.
The new code is in the form of a template so that it can be used from
QJsonDocument and QUrl, which have small modifications to how the
encoding is handled.
Change-Id: I305ee0fd8523cc4ec74c2678cb9ea88b75bac7ac
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This is only possible for two important reasons:
1) QString and QByteArray d pointers are both done with QArrayData and
that class does not care that the alignof(T) changes from 2 to 1,
so we can give the pointer from QString to QByteArray
(after adapting the allocated size, which is now double)
2) conversion from UTF16 to Latin1 always has fewer bytes (exactly half)
Change-Id: I17b2690c910f3de8db55156c6d6b5f55be06d827
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
First, use Qt::Uninitialized, since we're about to overwrite the memory
anyway with the new Latin 1 string.
Second, move the actual body of the conversion to a static void
function, which seems to improve code generation a little and, of
course, paves the way for the in-place conversion.
Change-Id: Iaed99ba1e52facad676510aa98443223e188d70a
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
This is the first step in implementing an in-place conversion of QString
to QByteArray. This requires ref-qualifiers in member functions so we
know that we have an rvalue QString.
Converting from UTF-16 to Latin1 always requires half the memory.
For conversion from UTF-16 to UTF-8, the typical string will also need
the same memory or less: characters from U+0000 to U+007F consume one
fewer byte; characters from U+0080 to U+07FF and from U+10000 to
U+1FFFFF occupy the same space in UTF-8 and UTF-16; it's only the ones
from U+0800 to U+FFFF that consume more space in the UTF-8 string.
For the locale's 8-bit codec, we can't be sure and the code (currently)
needs to go through QTextCodec anyway.
This requires a #define set before #include'ing "qstring.h". However,
since qstring.h is included by the QtCore PCH, we need an extra qmake
compiler without the PCH flags to compile this .cpp.
After this change, the distribution of calls in QtCore, Network, Gui,
and Widgets is as follows:
const & &&
toUtf8 31 (74%) 11 (26%)
toLatin1 79 (77%) 24 (23%)
toLocal8Bit 26 (16%) 138 (84%)
Change-Id: Idd96f9ddb51b989bc59f6da50054dd10c953dd4f
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
For the conflicts in msvc_nmake.cpp the ifdefs are extended since we
need to support windows phone in the target branch while it is not there
in the current stable branch (as of Qt 5.2).
Conflicts:
configure
qmake/generators/win32/msvc_nmake.cpp
src/3rdparty/angle/src/libEGL/Surface.cpp
src/angle/src/common/common.pri
src/corelib/global/qglobal.h
src/corelib/io/qstandardpaths.cpp
src/plugins/platforms/qnx/qqnxintegration.cpp
src/plugins/platforms/qnx/qqnxscreeneventhandler.h
src/plugins/platforms/xcb/qglxintegration.h
src/widgets/kernel/win.pri
tests/auto/corelib/thread/qreadwritelock/tst_qreadwritelock.cpp
tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp
tests/auto/gui/text/qtextdocument/tst_qtextdocument.cpp
tools/configure/configureapp.cpp
Change-Id: I00b579eefebaf61d26ab9b00046d2b5bd5958812
Since contains() just wraps indexOf(), which has a QLatin1String overload,
add one for contains(), too, for consistency.
[ChangeLog][QtCore][QString] Added QLatin1String overload of contains()
Change-Id: I2acc628a51e00789fb2b90400cf0c523a5b5e65a
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Default values should have mark-up to denote that they are code.
This commit changes:
-"property is true" to "property is \c true".
-"Returns true" to "Returns \c true".
-"property is false" to "property is \c false".
-"returns true" to "returns \c true".
-"returns false" to "returns \c false".
src/3rdparty and non-documentation instances were ignored.
Task-number: QTBUG-33360
Change-Id: Ie87eaa57af947caa1230602b61c5c46292a4cf4e
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Provides locale-related codepaths for WinRT where existing Win32 API is
unsupported.
Change-Id: I35b83d6b208165b7660cac3c9b383cb6ba7e5cf9
Done-with: Maurice Kalinowski
Reviewed-by: Andrew Knight <andrew.knight@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
These members were introduced in 4.8, but left undocumented. Because we
consider undocumented API to be internal, the members are \since 5.2.
Change-Id: I52e2840a8cfaa7f59f410b3e2a06c0942ea06539
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
New API:
static QString QString::fromCFString(CFStringRef string);
CFStringRef QString::toCFString() const;
static QString QString::fromNSString(const NSString *string);
NSString *QString::toNSString() const;
static QUrl QUrl::fromCFURL(CFURLRef url);
CFURLRef QUrl::toCFURL() const;
static QUrl QUrl::fromNSURL(const NSURL *url);
NSURL * QUrl::toNSURL() const;
Add Q_OS_MAC-protected function declarations to header
files, add implementation to _mm files.
CF and NS types are forward-declared in the header
files to avoid including the CoreFoundation and Foundation
headers. This prevents accidental use of native types
in application code. Add helper macros for forward-
declaration to qglobal.h
Add cf_returns_retained/ns_returns_autoreleased attributes
to toCFString() and toNSURL(). These attributes assists
the clang static analyzer. Add Q_DECL_ helper macros
to qcompilerdetection.h.
Add test functions (in _mac.mm files) to the QString
and QUrl tests. Split out the test class declarations
into a separate headers files.
Change-Id: I60fd5e93f042316196284c3db0595835fe8c4ad4
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
I didn't dig deeper to check where the additional reference came from,
but tracing confirmed that the QSharedDataPointer<QLocalePrivate>::detach()
call is gone with this change.
Background:
QString::vsprintf is used in the logging framework, and as such shouldn't
waste any memory. It's currently anyway unusable from, say, signal handlers,
but this is low-hanging fruit that shaves off one of the dozen or so
memory allocations involved in a simple qFatal() call.
Change-Id: I19fa2148f669dfc7b5f276221151e25a4348cbfe
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Also bring text closer to the style guide at
http://qt-project.org/wiki/CppDocumentationStyle
Change-Id: I30b1c36ac125a10c002efeb36978ced0d7a8f8bf
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
This is a simple optimisation allowed to us by the fact that all platforms
we run on use two's complement for the signed integers. The trick works as
long as one of the two signed integers is known beforehand to be
non-negative:
- by definition, for any signed integer i, i <= INT_MAX
- by definition, for any unsigned integer u, u >= 0
- given a signed integer x >= 0, 0U <= uint(x) <= uint(INT_MAX)
- therefore, given another signed integer y of whatever
value, uint(x) < uint(y) ←→ x < y && y >= 0
The trick is an optimisation because the compiler doesn't know that one of
the two sides is always non-negative. Otherwise, it would do the
same optimisation.
Change-Id: If256ec0df4e06335805af8010bb67ce5fd3e065a
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
The class missed the feature freeze for Qt 5.0, but has been ready
for quite a while. So make it public in time for Qt 5.2.
Change-Id: I9ac3f579ff5e371925fad40684762fff7ee4abd8
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
New functions left, right, mid were missing in the api.
Change-Id: I3590a84431555d009d5012b204c111385bdceed3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Use QuickCheck data from DerivedNormalizationProps.txt to check
if the input text is already in the desired Normalization Form.
\sa http://www.unicode.org/reports/tr15/#Detecting_Normalization_Forms
Using NF QC makes a significant boost to most operations that rely on
normalized input data, i.e. file path conversions on Mac, where "native"
form is a decomposed Unicode string.
Change-Id: I292a9da479c6beed730528fc7000c45bf1befc34
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
qstring.cpp(3896): error #68: integer conversion resulted in a change of sign
The line before also had 0x8000, but since there was no addition,
0x8000 was a literal converted to short. However, 0xff + 0x8000 is an
int, and 0x80ff is positive, while short(0x80ff) is negative.
Change-Id: I445ff401d817b643479e54320525890ce12bbfe5
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
It is deprecated and clang is starting to warn about it.
Patch mostly generated by clang itself, with some careful grep
and sed for the platform-specific parts.
Change-Id: I8058e6db0f1b41b33a9e8f17a712739159982450
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
c951908bc2 sneaked in without adding documentation
to those public static methods. Hence, the public documentation online for those
methods appear to be empty.
More importantly, they have been missing the indication that the introduction
took place in Qt 5.0.
Change-Id: I3ca3fa57a96e28e2d64d0af28159d8bda9cbe71a
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
we expect our source code to be utf-8 throughout, so it doesn't make
sense to expect the specifier to be latin-1, as that limits the
effective charset to ascii.
Change-Id: I22335509ba6c5805d8b264cfd01d7f9a4cf7ef76
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Replaces "QRegularExpresssion" with "QRegularExpression" and adds some
auto tests for the warning itself.
Task-number: QTBUG-30054
Change-Id: Iba333a4388795eccca809fb430c295f503794263
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Added the following functions to QStringRef: toShort, toUShort, toInt,
toUInt, toLong, toULong, toLongLong, toULongLong, toFloat, and toDouble.
These functions use the corresponding functions found in QLocale.
Updated tst_qstringref.cpp to exercise the new functionality.
Change-Id: I38668a0cc7da0c101a62613fd16cb5a98286617f
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Frederik Gladhorn
Sze Howe Koh
Thiago Macieira
lpapuga
Marc Mutz
Marcel Krems
Sergio Ahumada
Jerome Pasion
Kamil Trzcinski
Geir Vattekar
Mitch Curtis
Morten Johan Sørvig
Jędrzej Nowacki
Lars Knoll
Konstantin Ritt
Stephen Kelly
Samuel Rødal
Oswald Buddenhagen
Laszlo Papp
Friedemann Kleint
Debao Zhang
Keith Gardner