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This commit replaces MurmurHash with SipHash for all strings longer than
the size of a pointer. The most important difference between those
algorithms is that MurmurHash has this unwelcome property: for two
byte sequences x and y, if you know that x and y have the same hashing
for a given seed, then they have the same hashing for all seeds.
SipHash has no such issue. If the seed changes, the strings that used to
compute to the same hash are no longer likely to do so.
We've chosen to implement a SipHash-1-2 algorithm instead of the regular
2-4 as that has roughly the same performance as the old DJB33XA
algorithm. It's around 50% slower than MurmurHash, which is
acceptable given the added security.
Task-number: QTBUG-47566
Change-Id: I09100678ff4443e6be06fffd14819c8878d223e2
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
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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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It was misnamed local_database, quite missing the point of its name.
Change-Id: I73a4fdf24f53daac12304de1f443636d89afacb2
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
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This is a follow-up to 43abe86e.
Change-Id: I2442304c9c79bcb1932fb173b8d993a242d79f4b
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
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Document how to do an update, fix the bit-rot that had crept into
main.cpp since last it was compiled, correct the qt_attribution.json
to use the actual version number of UCD (its Revision number) instead
of the (admittedly correlated) Unicode release number. Updated to
Release 22 (which came with Unicode 11.0.0) in the process; but this
doesn't change our actual qunicodetables.cpp (so is incidental).
Task-number: QTBUG-71281
Change-Id: Ieb7a6e1a4d49f639993f76ff82c8f12a572db3c3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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This only updates data on languages already present in 5.12; once it
has merged up to dev, the scripts need to be run again to pick up a
few more languages and possibly add any more new languages present in
v34. Change some tests to match changes in en_AU's abbreviated day
and month names.
[ChangeLog][ThirdParty][CLDR] Update locale data to CLDR v34.
Task-number: QTBUG-71144
Change-Id: I68402b5e7e9d3dba669b8ba31b9a8abd86675c6e
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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Routine update in preparation for 5.12
* omitting Chakma because QLocale can't represent the zero digit,
* de_DE no longer uses vorm./nachm. but AM/PM
[ChangeLog][Third-party code] Updated CLDR to version 33.1
Task-number: QTBUG-67654
Change-Id: If20c47bb030abc3700b4f5a592152e617e2767c2
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
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[ChangeLog][Third-Party Code] Clarified use of "Unicode
Common Local Data Repository (CLDR)" in the documentation.
Also updated SPDX license name / ID.
Change-Id: I7261c675251dcca118f2661061a09b9c9200486e
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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[ChangeLog][Third-Party Code] Documented use of
"Unicode Character Database (UCD)" in Qt Core.
Change-Id: Id66877d04b4bbe6967d366bc631942e466a861ba
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Change-Id: I21bf76a5603f3384fccad46a16b7304380a7a444
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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