Name: icu URL: http://site.icu-project.org/ Version: 59.1 License: MIT Security Critical: yes Description: This directory contains the source code of ICU 59.1 for C/C++. A. How to update ICU 1. Run "scripts/update.sh <version>" (e.g. 59-1). This will download ICU from the upstream svn repository. It does preserve Chrome-specific build files (*local.mk) and converter files. (see section C) 2. Update the source file lists for i18n and common in icu.gypi and BUILD.gn. See the comments in the files. 3. Review and apply patches/changes in "D. Local Modifications" if necessary/applicable. Update patch files in patches/. 4. 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}/source/runConfigureICU Linux --disable-layout --disable-tests c. Run make 'make' will fail when pkgdata looks for root_subset.res. This is expected. See http://bugs.icu-project.org/trac/ticket/10570 d. Run ${CHROME_ICU_TREE_TOP}/scripts/trim_data.sh The full locale data for Chrome's UI languages and their select variants and the bare minimum locale data for other locales will be kept. e. Run ${CHROME_ICU_TREE_TOP}/scripts/make_data.sh This makes icudt${version}l.dat. f. Run ${CHROME_ICU_TREE_TOP}/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 g. Run ${CHROME_ICU_TREE_TOP}/android/patch_locale.sh On top of trim_data.sh (step d), further cuts the data entries for Android. h. Run ${CHROME_ICU_TREE_TOP}/scripts/make_data.sh This makes icudt${version}l.dat for Android. i. Run ${CHROME_ICU_TREE_TOP}/scripts/copy_data.sh android This copies the icu data file for Android to the following location: android/icudtl.dat j. Run ${CHROME_ICU_TREE_TOP}/ios/patch_locale.sh Further cuts the data size for iOS. k. Run ${CHROME_ICU_TREE_TOP}/scripts/make_data.sh This makes icudt${version}l.dat for iOS. l. Run ${CHROME_ICU_TREE_TOP}/scripts/copy_data.sh ios m. Run ${CHROME_ICU_TREE_TOP}/scripts/clean_up_data_source.sh This reverts the result of trim_data.sh and patch_locale.sh and make the tree ready for committing updated ICU data files for non-Android and Android platforms. n. Whenever data is updated (e.g timezone update), follow d ~ m as long as the ICU build directory used in a ~ c is kept. Besides, icudt.dll for Windows has to be udpated following the procedure described below. 2. icu data dll for Windows (non-default build option) Follow these steps to build windows/icudt.dll. By default, we set icu_use_icu_data_flag to 1 and don't use this file. a. check out a clean copy of icu59 from the upstream on Windows outside the Chrome tree. $ svn export --native-eol LF http://source.icu-project.org/repos/icu/icu/tags/release-59-1 ${SEPARATE_ICU_ROOT}/icu59 b. copy ${CHROME_ICU_ROOT}/common/icudtl.dat to ${SEPARATE_ICU_ROOT}/source/data/in/icudt59l.dat c. copy ${CHROME_ICU_ROOT}/source/data/makedata.mak to ${SEPARATE_ICU_ROOT}/source/data/makedata.mak c. In Visual Studio, open source/allinone/allinone.sln solution in ${SEPARATE_ICU_ROOT} d. Build 'makedata' target e. icudt59.dll will be generated in ${SEPARATE_ICU_ROOT}/bin f. Copy that icudt59.dll to ${CHROME_ICU_ROOT}/windows/icudt.dll and check that in. 3. Note on the locale data customization - scripts/trim_data.sh a. Trim the locale data for Chrome's UI langauges : locales, lang, region, currency, zone b. Trim 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. Remove the legacy Chinese character set-based collation (big5han/gb2312han) that don't make any sense and nobdoy uses. - android/patch_locale.sh a. Make changes to source/data/{region,lang} to exclude these data except the language and script names of zh_Hans and zh_Hant. b. Remove exemplar cities in timezone data (data/zone). c. Keep only the minimal calendar data in data/locales. d. Include currency display names for a smaller subset of currencies. e. Minimize the locale data for 9 locales to which Chrome on Android is not localized. f. Also apply android/brkitr.patch - android/brkitr.patch Do not use the C+J dictionary for Chinese/Japanese segmentation to reduce the data size. Adjust word.txt and a few other files. 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. 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/*/*local.mk - List locales of interest to Chromium a. Chrome's UI languages b. Variants of UI languages c. Other locales in Accept-Language list : will only have bare minimum locale data - brklocal.mk drops some line*brk files to save space for now. 3. source/data/brkitr - dictionaries/khmerdict.txt: Abridged Khmer dictionary. See http://bugs.icu-project.org/trac/ticket/9451 - rules/word_ja.txt (used only on Android) Added for Japanese-specific word-breaking without the C+J dictionary. 4. source/data/trnslit/root_subset.txt Subset of transliteration data to keep for: - Handling Chinese Simplified/Traditional text detection 5. Add {an,ast,ckb,ku,tg,wa}.txt to source/data/{locale,lang} with the minimal locale data necessary for spellchecker and and language menus. Also change the English display name for ckb to 'Kurdish (Arabic)'. 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 - patches/locale1.patch: Minor fixes for Korean 2. Breakiterator patches - patches/linebrk.patch a. Drop *_loose.txt for all locales and use the corresponding normal.txt 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) - patches/wordbrk.patch for word.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 - patches/khmer-dictbe.patch Adjust parameters to use a smaller Khmer dictionary (khmerdict.txt). http://bugs.icu-project.org/trac/ticket/9451 - Add several common Chinese words that were dropped previously to source/data/cjdict/brkitr/cjdict.txt patch: patches/cjdict.patch upstream bug: http://bugs.icu-project.org/trac/ticket/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 May 8, 2017, the latest version is 2017b and the above files are available at http://source.icu-project.org/repos/icu/data/trunk/tzdata/icunew/2017b/44/ 4. Build-related changes - patches/wpo.patch (only needed when icudata dll is used). upstream bugs : http://bugs.icu-project.org/trac/ticket/8043 http://bugs.icu-project.org/trac/ticket/5701 - patches/vscomp.patch for building with Visual Studio on Windows: do not use WINDOWS_LOCALE_API in locmap.c - patches/data.build.patch : Remove unnecessary resources : unames, collator rule source - patches/data.build.win.patch : Windows-only data build patch. - patches/data_symb.patch : Put ICU_DATA_ENTRY_POINT(icudtXX_dat) in common when we use the icu data file or icudt.dll 5. Add back UTF-32 converters temporarily even when UCONFIG_ONLY_HTML_CONVERSION is defined until UTF-32 is removed from Blink. See http://www.icu-project.org/trac/ticket/11296 and http://crbug.com/417850 - patches/utf32.patch 6. Don't use '__cdecl' for function arguments (as opposed to functions) in uclean.h to make MSVC happy (C4229 warning). http://www.icu-project.org/trac/ticket/13030 - patches/msvc4229.patch 7. C++ 11 does not allow a string literal to be assigned to a variable of char*. http://www.icu-project.org/trac/ticket/13192 - patches/string_literal_charptr.patch 8. Apply post-59 upstream fixes http://www.icu-project.org/trac/ticket/12333 http://www.icu-project.org/trac/ticket/13189 http://www.icu-project.org/trac/ticket/12635 http://www.icu-project.org/trac/ticket/13202 http://www.icu-project.org/trac/ticket/13277 - patches/ucase_utf8.patch - patches/ucurr_locale.patch - patches/collator_range.patch - patches/fuchsia.patch - patches/uloc_buffer_overrun.patch