2011-04-27 10:05:43 +00:00
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Unicode is used to generate the unicode data in src/corelib/tools.
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2018-10-19 13:33:34 +00:00
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To update:
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* Find the data (UAX #44, UCD; not the XML version) at
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ftp://www.unicode.org/Public/zipped/$Version/
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* Unpack the zip file; for each file in data/, replace with the new
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version; find the *BreakProperty.txt in auxiliary/. (These last are
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only in the zip, not in the web-space's unpacked versions.)
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* If needed, add an entry to enum QChar::UnicodeVersion for the new
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Unicode version
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* In that case, also update main.cpp's initAgeMap and DATA_VERSION_S*
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to match
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* Build this project. Its binary, unicode, ignores command-line
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options and assumes it is being run from this directory. When run,
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it produces lots of output. Hopefully that doesn't matter.
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* Assertions may trigger: if so, study code and understand what's more
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complicated about this update; talk to folk named in the git logs,
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maybe push a WIP to gerrit to solicit advice. Some bit-field may
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need to be expanded, for example. In some cases QChar may need
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additions to some of its enums.
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* Build with the modified code, fix any compilation issues.
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* That may have updated qtbase/src/corelib/tools/qunicodetables.cpp;
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if so the update matters; be sure to commit the changes to data/ at
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the same time and update tools/qt_attribution.json to match; use the
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UCD Revision number, rather than the Unicode standard number, as the
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Version, for all that qunicodetables.cpp uses the latter.
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The script writingSystems.sh generates a list of writing systems,
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ostensibly as a the basis for updating QFontDatabase::WritingSystem
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enum; however, the Release 20 output of it contains many more writing
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systems than are present in that enum, suggesting it has not been run
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in a very long time. Further research needed.
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