rpwoodbu / chromium_deps_icu Goto Github PK
View Code? Open in Web Editor NEWMirror of Chromium's fork of ICU
Home Page: https://chromium.googlesource.com/chromium/deps/icu/
License: Other
Mirror of Chromium's fork of ICU
Home Page: https://chromium.googlesource.com/chromium/deps/icu/
License: Other
Name: icu URL: https://github.com/unicode-org/icu Version: 73-1 CPEPrefix: cpe:/a:icu-project:international_components_for_unicode:73.1 License: MIT License File: LICENSE Security Critical: yes Shipped: yes Description: This directory contains the source code of ICU 73.1 for C/C++. A. How to update ICU 1. Run "scripts/update.sh <version>" (e.g. 73-1). This will download ICU from the upstream git repository. It does preserve Chrome-specific build files and converter files. (see section C) source.gni and icu.gyp* files are automatically updated, too. 2. Review and apply patches/changes in "D. Local Modifications" if necessary/applicable. Update patch files in patches/. 3. Follow the instructions in section B on building ICU data files B. How to build ICU data files Pre-built data files are generated and checked in with the following steps 1. icu data files for Chrome OS, Linux, Mac and Windows a. Make a icu data build directory outside the Chromium source tree and cd to that directory (say, $ICUBUILDIR). b. Run ${CHROME_ICU_TREE_TOP}/scripts/make_data_all.sh This script takes the following steps: i) Run ${CHROME_ICU_TREE_TOP}/source/runConfigureICU Linux --disable-layout --disable-tests ii) Run make iii) (cd data && make clean) iv) scripts/config_data.sh common This configure the build with filer for common. v) Run make vi) scripts/copy_data.sh common This copies the ICU data files for non-Android platforms (both Little and Big Endian) to the following locations: common/icudtl.dat common/icudtb.dat vii) Repeat step iii) - vi) for chromeos to produce chromeos/icudtl.dat viii) cast/patch_locale.sh Modify the file for cast, android, ios and flutter. ix) Repeat step iii) - vi) for cast, andriod and ios to produce cast/icudtl.dat andriod/icudtl.dat ios/icudtl.dat x) flutter/patch_brkitr.sh On top of cast/patch_locale.sh.sh (step viii)), further patch the code for flutter. xi) Repeat step iii) - vi) for flutter to produce flutter/icudtl.dat xii) scripts/clean_up_data_source.sh This reverts the result of cast/patch_locale.sh and flutter/patch_brkitr.sh make the tree ready for committing updated ICU data files for non-Android and Android platforms. c. Whenever data is updated (e.g timezone update), take step b as long as the ICU build directory used in a. is kept. 2. Note on the locale data customization - filter/chromeos.json a. Filter the locale data for ChromeOS's UI langauges : locales, lang, region, currency, zone b. Filter the locale data for non-UI languages to the bare minimum : ExemplarCharacters, LocaleScript, layout, and the name of the language for a locale in its native language. c. Filter the legacy Chinese character set-based collation (big5han/gb2312han) that don't make any sense and nobdoy uses. - filter/common.json Same as above in filter/chromeos.json, AND e. Filter exemplar cities in timezone data (data/zone). - filter/android.json and filter/ios.json a. Filter the locale data for Android / iOS UI langauges : locales, lang, region, currency, zone b. Filter the locale data for non-UI languages to the bare minimum : ExemplarCharacters, LocaleScript, layout, and the name of the language for a locale in its native language. c. Filter the legacy Chinese character set-based collation d. Filter source/data/{region,lang} to exclude these data except the language and script names of zh_Hans and zh_Hant. e. Keep only the minimal calendar data in data/locales. f. Include currency display names for a smaller subset of currencies. g. Minimize the locale data for 9 locales to which Chrome on Android is not localized. C. Chromium-specific data build files and converters They're preserved in step A.1 above. In general, there's no need to touch them when updating ICU. 1. source/data/mappings - convrtrs.txt : Lists encodings and aliases required by the WHATWG Encoding spec plus a few extra (see the file as to why). - ucmlocal.txt : to list only converters we need. - *html.ucm: Mapping files per WHATWG encoding standards for EUC-JP, Shift_JIS, Big5 (Big5+Big5HKSCS), EUC-KR and all the single byte encodings. They're generated with scripts/{eucjp,sjis,big5,euckr,single_byte}_gen.sh. - gb18030.ucm and windows-936.ucm gb_table.patch was applied for the following changes. No need to apply it again. The patch is kept for the record. a. Map \xA3\xA0 to U+3000 instead of U+E5E5 in gb18030 and windows-936 per the encoding spec (one-way mapping in toUnicode direction). b. Map \xA8\xBF to U+01F9 instead of U+E7C8. Add one-way map from U+1E3F to \xA8\xBC (windows-936/GBK). See https://www.w3.org/Bugs/Public/show_bug.cgi?id=28740#c3 2. source/data/brkitr - dictionaries/khmerdict.txt: Abridged Khmer dictionary. See https://unicode-org.atlassian.net/browse/ICU-9451 - dictionaries/laodict.txt: Abridged Lao dictionary. We keep using the smaller old version from ICU69-1. - rules/word_ja.txt (used only on Android) Added for Japanese-specific word-breaking without the C+J dictionary. - rules/{root,zh,zh_Hant}.txt a. Use line_normal by default. b. Drop local patches we used to have for the following issues. They'll be dealt with in the upstream (Unicode/CLDR). http://unicode.org/cldr/trac/ticket/6557 http://unicode.org/cldr/trac/ticket/4200 (http://crbug.com/39779) 3. Add {an,ku,tg,wa}.txt to source/data/{locale,lang} with the minimal locale data necessary for spellchecker and and language menus. D. Local Modifications 1. Applied locale data patches from Google obtained by diff'ing the upstream copy and Google's internal copy for source/data - patches/locale_google.patch: * Google's internal ICU locale changes * Simpler region names for Hong Kong and Macau in all locales * Currency signs in ru and uk locales (do not include 'tr' locale changes) * AM/PM, midnight, noon formatting for a few Indian locales * Timezone name changes in Korean and Chinese locales * Default digit for Arabic locale is European digits. - patches/locale1.patch: Minor fixes for Korean - patches/name_5_langs.patch: add the native names of 5 languages not currently supported by CLDR/ICU. When updating the ICU to a new version, source/data/lang/{ay,dv,ilo,lus,ts}.txt have to be checked and if they are present with their display names populated, this patch has to be adjusted or discarded as necessary. 2. Breakiterator patches - patches/wordbrk.patch for word.txt, word_POSIX.txt, and word_fi_sv.txt a. Move full stops (U+002E, U+FF0E) from MidNumLet to MidNum so that FQDN labels can be split at '.' b. Move fullwidth digits (U+FF10 - U+FF19) from Ideographic to Numeric. See http://unicode.org/cldr/trac/ticket/6555 c. Restore pre-ICU 72 behavior of breaking at '@'. The new upstream behavior of not breaking at '@' interacted badly with the local change to break at '.' (D.2.a above): although not breaking at '@' is intended to not break within e-mail addresses, this is not possible with Chromium's break-at-'.' behavior. - patches/khmer-dictbe.patch Adjust parameters to use a smaller Khmer dictionary (khmerdict.txt). https://unicode-org.atlassian.net/browse/ICU-9451 - Add several common Chinese words that were dropped previously to source/data/cjdict/brkitr/cjdict.txt patch: patches/cjdict.patch upstream bug: https://unicode-org.atlassian.net/browse/ICU-10888 3. Timezone data update Run scripts/update_tz.sh to grab the latest version of the following timezone data files and put them in source/data/misc metaZones.txt timezoneTypes.txt windowsZones.txt zoneinfo64.txt As of Mar 31, 2023, the latest version is 2023c and the above files are available at the ICU github repos. 4. Build-related changes - patches/configure.patch: * Remove a section of configure that will cause breakage while running runConfigureICU. - patches/wpo.patch (only needed when icudata dll is used). upstream bugs : https://unicode-org.atlassian.net/browse/ICU-8043 https://unicode-org.atlassian.net/browse/ICU-5701 - patches/data_symb.patch : Put ICU_DATA_ENTRY_POINT(icudtXX_dat) in common when we use the icu data file or icudt.dll 5. ISO-2022-JP encoding (fromUnicode) change per WHATWG encoding spec. - patches/iso2022jp.patch - upstream bug: https://unicode-org.atlassian.net/browse/ICU-20251 6. Enable tracing of file but not resource, only for Chromium to reduce performance impact/risk. - patches/restrace.patch 7. Patch Arabic date time pattern back to 67 value to avoid test breakage in third_party/blink/web_tests/fast/forms/datetimelocal/datetimelocal-appearance-l10n.html - patches/ardatepattern.patch - https://bugs.chromium.org/p/chromium/issues/detail?id=1139186 8. Remove explicit std::atomic<NumberRangeFormatterImpl*> template instantiation patches/atomic_template_instantiation.patch - The explicit instantiation was added to silence MSVC C4251 warnings: https://unicode-org.atlassian.net/browse/ICU-20157 Small test cases show that it is generally an error to instantiate std::atomic<T*> with an incomplete type T with MSVC, clang, and GCC, so this instantiation never should have worked: https://gcc.godbolt.org/z/34xx8h At this time, it's not clear if this particular instantiation with NumberRangeFormatterImpl* was ever necessary for MSVC. Further testing with MSVC is required to upstream this patch. - https://unicode-org.atlassian.net/browse/ICU-21482 9. Patch source/common/uposixdefs.h so it compiles on Fuchsia on Macs. patches/fuchsia.patch - context bug: https://bugs.chromium.org/p/chromium/issues/detail?id=1184527 10. Patch fix of double free during OOM patches/ultag_parse-double-free.patch - https://unicode-org.atlassian.net/browse/ICU-22475 - unicode-org/icu#2567 11. Patch fix to support TimeZone GMT-16:00 ... GMT-23:59. patches/gmt24.patch - https://unicode-org.atlassian.net/browse/ICU-22526 - unicode-org/icu#2646 12. Patch fix of Etc/Unknown being returned for Intl.DateTimeFormat().resolvedOptions().timeZone on macOS 14. patches/revert_realpath.patch - https://bugs.chromium.org/p/chromium/issues/detail?id=1473422 - https://unicode-org.atlassian.net/browse/ICU-22541
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