Commit Graph

4336 Commits

Author SHA1 Message Date
Lars Knoll
50c96c17b6 Use the new support for comparisons in QMetaType for QVariant
Remove the compare method in the QVariant::Handler struct. Rely
on the generic support provided by QMetaType instead.

[ChangeLog][Important Behavior Changes][QVariant] QVariant will now use builtin support in
QMetaType to compare its content. This implies a behavioral change
for some graphical types like QPixmap, QImage and QIcon that will
never compare equal in Qt 6 (as they do not have a comparison
operator).

Change-Id: I30a6e7116c89124d11ed9052537cecc23f78116e
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
2020-08-13 08:48:03 +02:00
Thiago Macieira
99ce02f692 QCborValue: add support for QCOMPARE string output
Change-Id: Ibdc95e9af7bd456a94ecfffd16066c47ea9766d0
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
2020-08-12 21:05:06 -07:00
Thiago Macieira
e790af0e0a QJsonDocument: fix comparison of valid vs default
[ChangeLog][QtCore][QJsonDocument] Fixed a bug that caused
QJsonDocument's equality operator to crash if one of the operands was
default-constructed and the other wasn't.

Pick-to: 5.15
Fixes: QTBUG-85969
Change-Id: I5e00996d7f4b4a10bc98fffd1629f835f570ef6b
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
2020-08-11 13:00:47 -07:00
Edward Welbourne
fed97b9264 Sort out the overflow cases in tst_QDateTime
Use the actual minimum value, rather than minus the maximum, and adapt
the overflow expectations so that they're correct west of Greenwich as
well as east.

Change-Id: I7a5f4510db0fdea3855b5b2bd4c4a86882030efd
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-08-11 11:21:46 +02:00
Edward Welbourne
72d14fe32f Fix handling of last second in 1969
Due to a limitation of mktime(), we would have declared it invalid.
Tidied up qt_mktime() slightly in the process.

Change-Id: I25469e314afee6e0394e564bc69a98883005d4ec
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-08-11 11:20:43 +02:00
Edward Welbourne
fe6a1d34dc QFileInfo: purge deprecated API
Since 5.10: created()
Since 5.13: readLink()

Change-Id: I9722f81750dd92315a67a1c38df41a95ae63e0db
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2020-08-07 17:44:51 +02:00
Edward Welbourne
5a682b04ce Purge QResource of some deprecated API
Removed isCompressed(), deprecated since 5.15, and (since 5.13)
addSearchPath() and searchPath().

Change-Id: I4b6fb8077c02bbe322334e474eaf0a2a7caf0004
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2020-08-07 17:44:13 +02:00
Edward Welbourne
7ce27430a7 tst_QStringConverter: fix some deprecation warnings
QString's fromUtf16() prefers char16_t data over ushort.

Change-Id: Ib20c5afa09ceabb4e91fe434b6a057edb4739a53
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2020-08-07 17:44:01 +02:00
Alexandru Croitor
92ee9bd6b8 CMake: Properly handle CONFIG += thread aka Threads::Threads
mkspecs/features/qt.prf adds a dependency on the system threading
library if the Qt Core thread feature is enabled. Because qt.prf is
loaded by any public or internal Qt project, it's essentially a public
dependency for any Qt consumer.

To mimic that in CMake, we check if the thread feature is enabled, and
and set the Threads::Threads library as a dependency of Qt6::Platform,
which is a public target used by all Qt modules and plugins and Qt
consumers.

We also need to create a Qt6Dependencies.cmake file so we
find_package(Threads) every time find_package(Qt6) is called.

For the .prl files to be usable, we have to filter out some
CMake implementation specific directory separator tokens
'CMAKE_DIRECTORY_ID_SEP' aka '::@', which are added because we call
target_link_libraries() with a target created in a different scope
(I think).

As a result of this change, we shouldn't have to hardcode
Threads::Threads in other projects, because it's now a global public
dependency.

Task-number: QTBUG-85801
Task-number: QTBUG-85877
Change-Id: Ib5d662c43b28e63f7da49d3bd77d0ad751220b31
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
2020-08-06 19:15:39 +02:00
Giuseppe D'Angelo
4fc539bd84 QMap: fix insert() rvalue overloads
Receiving an rvalue still requires to check whether the parameter
is detached, otherwise we can't steal its backing std::map.

Change-Id: Ie88dbf39fd777112ad7bb20a46d5c2d65be8eb3d
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-08-06 19:15:39 +02:00
Giuseppe D'Angelo
14090760a8 Long Live QMap as a refcounted std::map!
... and QMultiMap as std::multimap.

Just use the implementation from the STL; we can't really claim that
our code is much better than STL's, or does things any differently
(de facto they're both red-black trees).

Decouple QMultiMap from QMap, by making it NOT inherit from
QMap any longer. This completes the deprecation started in 5.15:
QMap now does not store duplicated keys any more.

Something to establish is where to put the
QExplictlySharedDataPointer replcement that is in there as an
ad-hoc solution. There's a number of patches in-flight by Marc
that try to introduce the same (or very similar) functionality.

Miscellanea changes to the Q(Multi)Map code itself:

* consistently use size_type instead of int;
* pass iterators by value;
* drop QT_STRICT_ITERATORS;
* iterators implictly convert to const_iterators, and APIs
  take const_iterators;
* iterators are just bidirectional and not random access;
* added noexcept where it makes sense;
* "inline" dropped (churn);
* qMapLessThanKey dropped (undocumented, 0 hits in Qt, 1 hit in KDE);
* operator== on Q(Multi)Map requires operator== on the key type
  (we're checking for equality, not equivalence!).

Very few breakages occur in qtbase.

[ChangeLog][Potentially Source-Incompatible Changes] QMap does not
support multiple equivalent keys any more. Any related functionality
has been removed from QMap, following the deprecation that happened
in Qt 5.15. Use QMultiMap for this use case.

[ChangeLog][Potentially Source-Incompatible Changes] QMap and
QMultiMap iterators random-access API have been removed. Note that
the iterators have always been just bidirectional; moving
an iterator by N positions can still be achieved using std::next
or std::advance, at the same cost as before (O(N)).

[ChangeLog][Potentially Source-Incompatible Changes] QMultiMap does
not inherit from QMap any more. Amongst other things, this means
that iterators on a QMultiMap now belong to the QMultiMap class
(and not to the QMap class); new Java iterators have been added.

Change-Id: I5a0fe9b020f92c21b37065a1defff783b5d2b7a9
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2020-08-06 19:15:39 +02:00
Thiago Macieira
45838673df Implement UTF-16 to UTF-8 case-insensitive compare and make public
Change-Id: Ied637aece2a7427b8a2dfffd16116cf3645c6359
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2020-08-05 21:51:24 -07:00
Thiago Macieira
f2abfb39d7 QDebug: add operator<<(const char16_t *)
Avoids the conversion from UTF-8 for uses that are not dumping a string.

Mass conversion of Qt sources left for future opportunity.

Fixes: QTBUG-85811
Change-Id: I4ca4a35b687b46c39030fffd1626ae6c3294cacf
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2020-08-04 15:13:09 -07:00
Fabian Kosmale
652062dde3 QNotifiedProperty: avoid crash
We can end up in a situation where a (soon to be destroyed) observer is
owned by a binding which is about to be deleted. If in that situation
the binding is destroyed first, we end up with a dangling pointer
and ensuing memory corruption. Instead, we now first transfer the
ownership of the observer and only destroy the binding afterwards.

Fixes: QTBUG-85824
Change-Id: I721c0319281ada981ae7896bd2e02e9a0cc901b8
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2020-08-04 11:28:33 +00:00
Tor Arne Vestbø
561da776c9 Remove const volatile qualifier on return type in test
Fixes warning by Clang:

   warning: 'const volatile' type qualifiers on return type have no effect
      [-Wignored-qualifiers]
    const volatile unsigned long long * const volatile func_KVPKVull() {...}
                                        ^~~~~~~~~~~~~~~

Change-Id: Ia4aae6521c84f4a18d92ad5035af5b247d283140
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-08-04 05:12:31 +00:00
Andrei Golubev
b3c1093751 Introduce swap functions for QPromise/QFutureInterface
Made QPromise::swap public, added free standing swap() for
QFutureInterface and QPromise. Updated QPromise special member
functions. Extended tests

Task-number: QTBUG-84977
Change-Id: I5daf6876df306d082441dbcdf5ae4dee3bfc0ead
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
2020-08-03 16:47:31 +02:00
Mårten Nordheim
246e712548 Move-enable QByteDataBuffer::{append,prepend}
Change-Id: I2fd342465475e3a694c8459a54957149f8b418a9
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-08-01 10:51:21 +02:00
Mårten Nordheim
5d7be66fd7 QList: Add a append(QList &&) overload
We already had append(const QList &) and now there's an overload
taking an rvalue reference.

Change-Id: Id2fbc6c57badebebeee7b80d15bb333270fa4e19
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-08-01 00:01:52 +02:00
Thiago Macieira
95afe6b244 QSharedPointer: do allow calling deleters on null pointers
I don't know why std::shared_ptr allows this, but why not.

[ChangeLog][Important Behavior Changes] QSharedPointer objects will now
call custom deleters even when the pointer being tracked was null. This
behavior is the same as std::shared_ptr.

Fixes: QTBUG-85285
Pick-to: 5.15
Change-Id: I24006db8360041f598c5fffd161c260df0313b55
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
2020-07-31 10:40:25 -07:00
Thiago Macieira
fe9e6b2ceb QString::vasprintf: fix 't' modifier for integers on 64-bit
‘t’
     Specifies that the argument is a ‘ptrdiff_t’.
     This modifier was introduced in ISO C99.

We use qsizetype, which is the same width as ptrdiff_t, so it makes no
difference in va_arg().

Change-Id: Iea47e0f8fc8b40378df7fffd16255730109413a5
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2020-07-31 10:36:33 -07:00
Edward Welbourne
a6b3a1e459 Remove deprecated binary json feature
Deprecated in 5.15 in favor of CBOR.

Fixes: QTBUG-81239
Change-Id: I711d4bd7dd1247f58e77ac9fa53304cbe5028918
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2020-07-31 17:12:48 +02:00
Allan Sandfeld Jensen
0792188440 Add float->qfloat16 rounding and fix the tests
Our hardware optimized conversions of float to qfloat16 rounds to even
where our table based conversion truncated to zero.

The rounding is not in this patch exactly round to even like the
hardware implementation but much closer.

Change-Id: I4c5e72c15fef9079d3660680b2727ff7ba4e768a
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-07-31 16:50:30 +02:00
Linus Jahn
5d69aa3ee1 QCryptographicHash: Add BLAKE2b and BLAKE2s hashing algorithms
BLAKE2 does not specify requirements about specific hash sizes and
since QCryptographicHash does not support dynamic hash sizes, only the
most common hash sizes could be covered by this.

The supported hash sizes were chosen to match the ones supported by the
Linux kernel.

The new hashing algorithms for QCryptographicHash are:
 * BLAKE2b (160 bit, 256 bit, 384 bit, 512 bit)
 * BLAKE2s (128 bit, 160 bit, 224 bit, 256 bit)

[ChangeLog][QtCore][QCryptographicHash] Added BLAKE2b and BLAKE2s
hashing algorithms.

Fixes: QTBUG-78198
Change-Id: Id9e0180a974093982fdf1cdd6180988a2e5e9f4f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-07-31 15:05:18 +02:00
Fabian Kosmale
cb80720287 Expose QMetaTypeInterface::alignof in QMetaType
We already have the information in the QMetaTypeInterface, and provide
functions to access sizeof. Adding alignof support seems natural, and
should make it easier to handle over-aligned types.
This should also be helpful in QVariant.

Change-Id: I166be76f4b7d2d2e524a3a1e513bd2f361e887c1
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2020-07-31 09:46:54 +02:00
Tor Arne Vestbø
e7ade60925 Add missing override in tst_QSortFilterProxyModel
Change-Id: I8ffe92cd5a68bf86688e1d942d079ac6ff115d11
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
2020-07-29 14:33:48 +02:00
Tor Arne Vestbø
b535a67910 Fix warning when comparing qsizetype to size_t
Change-Id: I4ea7ccb4daf05c735c831964f94c120d179521dd
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
2020-07-29 12:33:33 +00:00
Tor Arne Vestbø
9023791a45 Fix warnings about unused expression results in tests
Change-Id: I401ec8a3742a5bb51a1b8b291c53395c3880117c
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
2020-07-29 14:33:29 +02:00
Tor Arne Vestbø
6f17509ad9 Fix warnings about unused members in tests
Change-Id: I741cf08c26f8a2e297926cc01968ff09e70462a2
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
2020-07-29 14:33:24 +02:00
Tor Arne Vestbø
dfeedc17a2 Disable deprecation warnings in some tests
The tests are testing deprecated functionality, which we
still want to test.

Change-Id: Iad6ed35800896170c17fe019c7a6ecda22398ac3
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
2020-07-29 14:33:23 +02:00
Tor Arne Vestbø
57337f21c7 Add missing braces when constructing BigConvertible in tst_qvariant
Change-Id: Ia571e8950aa28721080dc7434921b79ffda913f4
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
2020-07-29 14:33:20 +02:00
Allan Sandfeld Jensen
d782df4861 Make qfloat16 helper functions consistent with float/double versions
Infinite is only when the mantissa is 0, everything else is NaN.

std::isnormal returns false on zero.

Pick-to: 5.15
Change-Id: I897fc0dc3b8a9c557bb1922ea7ca8df501e91859
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-07-28 18:12:07 +02:00
Edward Welbourne
f4323889f1 QLine: purge deprecated API
Since 5.14: intersect(), angle().  Also removed definition of M_2PI
from test, since its last use was in the tests being removed.

Change-Id: Ie3a12247e3760e8bfdd3a659cd06245c86b198c2
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
2020-07-27 11:26:08 +02:00
Edward Welbourne
d3c8757731 Purge redundant recoding of URL fragments from QByteArray
QUrl::fromEncodedComponent_helper() only existed to support some old
methods deprecated since 5.0, that I recently removed.
It was the only caller of qt_urlRecodeByteArray() aside from that
function's own autotest.
Both were private.

Task-number: QTBUG-85700
Change-Id: I5d09fd44e768847ce51a1ae7043150922cb5314c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
2020-07-27 11:25:49 +02:00
Tor Arne Vestbø
bd3088ceb3 Fix warnings about unused variables and functions in tests
Change-Id: Ia758a91384083c13fb4d743f500fef7a6629dfd5
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-07-26 18:06:46 +02:00
Tor Arne Vestbø
f418a96f9b Disable warning about self-move and self-assign-overload
Change-Id: I1d20d3f424eced5cc5787934663b9d243f75d46e
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-07-26 18:06:34 +02:00
Tor Arne Vestbø
d1fd2ff11f Fix warning when comparing qsizetype to result of sizeof
warning: comparison of integers of different signs: 'qsizetype' (aka 'long long') and 'unsigned long'

Change-Id: I03acb1f7aed782169a0a42cd8afc84b85991cd1e
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-07-26 18:06:21 +02:00
Tor Arne Vestbø
d96193b0ec Fix warning when printing of qsizetype
warning: format specifies type 'int' but the argument has type 'qsizetype' (aka 'long long')

Change-Id: I6099b53efecea46d191d5dc019c986f99e49c1f1
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-07-26 17:39:31 +02:00
Edward Welbourne
f16ab166bc QLogging: purge deprecated qInstallMsgHandler(QtMsgHandler)
Deprecated since 5.0.  Renamed a function in a manual test that no
longer needs to say it's Qt5-specific.

Change-Id: I6f2159c702f389d378a0e4d86bd4fe633298b100
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
2020-07-23 11:05:53 +02:00
Tor Arne Vestbø
15a5d1996f tst_QPluginLoader: Fix MachO stub tests
The -arch_blank argument to lipo is no longer supported.

Pick-to: 5.15
Pick-to: 5.12
Change-Id: I47efcb3633f23b7a18d66211bc16d5c9dbc067c8
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-07-22 02:04:15 +02:00
Edward Welbourne
e4e4bb78b7 tst_QLine: use qmath.h's constants instead of local versions
Change-Id: I41313f7e7caf3c364ae900a0b100c661aafb290d
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
2020-07-21 17:05:01 +02:00
Edward Welbourne
f12132ff23 QCommandLineOption: purge deprecated API
Since 5.8: setHidden(), isHidden()
Part of the QCommandLineParser test also used setHidden().

Change-Id: I05a1c63ff3beb1167ed75632c1b71d7fff17f09e
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
2020-07-20 16:06:28 +02:00
Edward Welbourne
0a961129f0 QUrl: purge deprecated API
Since 5.0: QUrl's image of the QUrlQuery API
Remove deprecation-suppression from tst_qurl.cpp, too.

Change-Id: Ide826283cb4e177fb34fb4080502f5a4620bd5d7
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
2020-07-20 16:06:28 +02:00
Edward Welbourne
996a7fc6f1 QChar: purge deprecated API
Since 5.3 joining() and old Joining type
Replaced by JoiningType joiningType()

Change-Id: Iefee50aaf94cec6d67b5fc004b3e68357b2015c5
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
2020-07-20 16:06:28 +02:00
Lars Schmertmann
76d02d895a Fix compiler warning in tst_qstringlistmodel
Warning: redundant move in return statement [-Wredundant-move]

Change-Id: I426c8c41c52b43ae3863f5aaf86027cabb961388
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
2020-07-20 09:38:58 +02:00
Edward Welbourne
d853816307 Fix handling of Suzhou numbering system
This only arises when the system locale tells us to use its zero as
our zero digit, since no CLDR locale uses it by default. Adapt an
MS-specific QLocale::system() test to use Suzhou numbering, so as to
test this.

While updating the locale-restoration code to also restore the digits
being set in that test, add restore code for the long time format,
where previously only the short time format was restored. Add a
comment to make it less likely one of those shall be missed in future.

Fixes: QTBUG-85409
Change-Id: I343324bb563ee0e455dfe77d4825bf8c3082ca30
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-07-17 12:19:01 +02:00
Edward Welbourne
d6502614d0 Deprecate QTimeLine's curveShape in favor of its easingCurve
QEasingCurve has a richer variety of curves and curveShape was already
implemented by changing the easingCurve property.

[ChangeLog][QtCore][QTimeLine] Deprecated QTimeLine's curveShape
property in favor of the easingCurve property.

Pick-to: 5.15
Change-Id: I7261c0f24d7e02bc94624f0b74d699df62de1a52
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
2020-07-16 17:39:11 +02:00
Volker Hilsheimer
124590850b Don't test for equality if types can't be compared
For types that don't have an operator==(), always trigger the binding
and the changed notification.

Task-number: QTBUG-85578
Change-Id: I41374f6d13c88106f4de83864e82172f3a248150
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
2020-07-15 16:16:53 +02:00
Fabian Kosmale
ca54b741d6 qtypeinfo: Improve container check
Smart pointers like QSharedPointer<T> do have a value_type, but their
equality does not depend on T being comparable. Therefore, instead of
simply checking for T::value_type, test for a few other container
requirements.
This also required to add an additional check for std::optional, as that
one has an unconstrained operator== on MSVC.

Change-Id: Iefd048f7aa360f4713ecd79f80acd7dae72ee18c
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
2020-07-14 17:06:47 +02:00
Edward Welbourne
bb6a73260e Support digit-grouping correctly
Read three more values from CLDR and add a byte to the bit-fields at
the end of QLocaleData, indicating the three group sizes. This adds
three new parameters to various low-level formatting functions. At the
same time, rename ThousandsGroup to GroupDigits, more faithfully
expressing what this (internal) option means.

This replaces commit 27d1391280 with a
fuller implementation that handles digit-grouping in any of the ways
that CLDR supports. The formerly "Indian" formatting now also applies
to at least some locales for Bangladesh, Bhutan and Sri Lanka.

Fixed Costa Rica currency formatting test that wrongly put a separator
after the first digit; the locale (in common with several Spanish
locales) requires at least two digits before the first separator.

[ChangeLog][QtCore][Important Behavior Changes] Some locales require
more than one digit before the first grouping separator; others use
group sizes other than three. The latter was partially supported (only
for India) at 5.15 but is now systematically supported; the former is
now also supported.

Task-number: QTBUG-24301
Fixes: QTBUG-81050
Change-Id: I4ea4e331f3254d1f34801cddf51f3c65d3815573
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-07-14 14:52:08 +02:00
Edward Welbourne
3f8eae848e Fix floating-point 'g'-format's choice between 'e' and 'f' forms
During review of a refactor (coming shortly), Thiago wondered what the
magic numbers were. On closer examination, I concluded that they were
wrong and wrote some tests to prove it. This commit adds those tests;
replaces the misguided old code with something that passes them; and
documents the reasons for the various parts of its decisions.

In the process, tidy up QLocaleData::doubleToString() somewhat and
rename some of its variables to conform to Qt coding style.

Change-Id: Ibee43659b1bdb0707639cdb444cfe941c31d409f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2020-07-14 14:52:08 +02:00