icu local change part1

icu52/README.chromium

 Name: icu
 URL: http://site.icu-project.org/
 Version: 52.1
 License: MIT
 Security Critical: yes
 
 Description:
 This directory contains the source code of ICU 52.1 for C/C++
 
 1. It was obtained with the following:
 
     $ svn export --native-eol LF http://source.icu-project.org/repos/icu/icu/tags/release-52-1 icu52
 
   The following directories we don't use are removed:
 
    - as_is
    - packaging
    - source/layout
    - source/layoutex
 
-2. Platform header files for Linux, FreeBSD, OpenBSD, Android, Mac OS X, and QNX:
+  patches/configure.patch is applied to get runConfigureICU work in the 
+  icudata generation step without layout and layoutex directory by removing the
+  corresponding Makefile's from ac_config variable.
 
-   - Apply platform.patch in patches directory. : It applies the upstream
-     patch to platform.h.in (see http://bugs.icu-project.org/trac/ticket/8248)
-     and change source/common/unicode/ptypes.h to refer to plinux.h and
-     pmac.h generated below.
+2. Apply the following patch for platform related headers (putilimpl.h and 
+   others).
 
-   - 'runConfigureICU Linux', 'runConfigureICU FreeBSD', and
-     'runConfigureICU MacOSX' are run to generate
-     source/common/unicode/platform.h.
-
-   - On OpenBSD, source/common/unicode/platform.h is being generated
-     by the icu4c port in the ports directory and not by runConfigureICU.
-     In case the file has to be updated you can do:
-     cd /home/ports/textproc/icu4c && make configure
-
-   - Rename it to 'plinux.h', 'pfreebsd.h', 'popenbsd.h' and 'pmac.h'
-
-   - Apply patches/pmach.h.patch on Mac to pmac.h
-
-   - On Android, the pandroid.h was generated by copying plinux.h to
-     pandroid.h and applying the patches/pandroid.h.patch.
-
-   - For QNX, the pqnx.h was generated by copying plinux.h to
-     pqnx.h and applying the patches/platform.qnx.patch.
-
-   - For NaCl (icu_nacl.gypi), the pnacl.h was generated by copying plinux.h to
-     pnacl.h and applying the patches/pnacl.h.patch.
-
-   - Apply the CL at https://codereview.chromium.org/15973007/ to plinux.h
-
-3. The following directories were removed because they're not used by Chromium
-   at the moment:
-   as_is
-   packaging
-   source/extra
-   source/sample
-   source/layout
-   source/layoutex
+  - patches/putil.patch for Android and QNX
+    Upstream bug for Android : http://bugs.icu-project.org/trac/ticket/10478
+    Upstream bug for QNX : http://bugs.icu-project.org/trac/ticket/10811
 
 
-4. The word breaking for Chinese and Japanese were modified to use a word
-   frequency list with the following patch and cjdict.txt.
+3. Breakiterator patches
 
-   - patches/segmentation.patch :
-       Adds a dictionary (word-frequency)-based word breaking for CJK
-       (Korean is supported in the code, but it does not do anything
-        because we don't have a Korean word-list.)
+   - Apply patches/brkitr.patch 
+     * 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 
+     * line.txt
+       a. Use Japanese rules for all locales because Japanese tailoring only
+          affects Japanese specific characters.
+          See http://unicode.org/cldr/trac/ticket/3974
+       b. Minor changes in CL, OP and IS definitions to handle 'comma-variants'
+          more consistenly.
+          See http://unicode.org/cldr/trac/ticket/6557
+       c. Fix line breaking for Chinese characters and quotation marks
+          See http://unicode.org/cldr/trac/ticket/4200 and 
+              http://crbug.com/39779
+             
 
-   - source/data/brkitr/cjdict.txt :
-       Chinese and Japanese word frequency list.
-       See the file for license/copyright notice
+   - Add a new file brklocal.mk (copied from brkfiles.mk) with line_ja.txt
+     and word_POSIX.txt dropped from the build list.
 
-   - source/data/brkitr/cc_edict.txt :
-       the list of words derived from CC-Edict.)
-
-   - patches/brkitr.patch
-     * word.txt : Chinese/Japanese segmentation rules, Hebrew-script-specific
-                  handling of U+0022, and splitting of FQDN into labels at '.'.
-                  For Hebrew, see http://unicode.org/cldr/track/ticket/3120
-     * line.txt : Incorporated line_he and minor changes in CL, OP and ID
-                  definitions.
-                  For Hebrew, see http://unicode.org/cldr/track/ticket/4004
-                  For others, see http://unicode.org/cldr/track/ticket/3974
-                                  http://unicode.org/cldr/track/ticket/4200
-                                  http://unicode.org/cldr/track/ticket/
-     * brklocal.mk : build file changes to drop unnecessary brkitr rule
-                     files (e.g. word_ja.txt, line_he.txt)
+   - Apply patches/khmer-dictbe.patch and put in a smaller Khmer dictionary
+     (source/data/brkitr/khmerdict.txt) obtained from 
+     http://bugs.icu-project.org/trac/ticket/9451
 
    - android/brkitr.patch (to be applied for Android build only) :
        Reverts some changes about Chinese/Japanese segmentation rules in
        patches/brkitr.patch to reduce binary size for Android.
 
-   If you want to run ICU tests, you have to copy source/data/brkitr/cjdict.txt
-   to source/test/testdata/cjdict-truncated.txt to pass TestTrieWithValue test.
+4. Converter changes : 
 
-5. Converter changes : converters.patch
-  - Include what we really need. See source/data/mappings/ucmlocal.txt
-  - Alias and mapping changes : source/data/mappings/convrtrs.txt
-  - Changes several tables and add six new tables, three of which
-    are 'fake' tables for ISO-2022-CN(-Ext).
-  - ucnv2022.c is modified to use 3 'fake' tables added above for
-    ISO-2022-CN(-Ext).
+  - converters.patch : 
+     a. revises existing mapping tables
+     b. Remove a lot of unused aliases in the converter alias table
+        (source/data/mappings/convrtrs.txt ) leading to 40kB size reduction.
 
-6. Locale changes
+  - Add source/data/mappings/ucmlocal.txt : to list only converters we need.
+  - Add two new tables per WHATWG encoding standards for EUC-JP and CP866.
+    They're generated with scripts/{eucjp, ibm866}_gen.sh. 
+  - Add three 'fake' tables for ISO-2022-CN(-Ext) : noop-*.ucm.
+
+  - uconv.patch 
+    a. ucnv2022 uses 3 fake tables for ISO-2022-CN(-Ext) instead of two
+       huge tables.
+    b. ISO-2022-JP-[1-4] is dropped.
+    c. SCSU, BOCU, ISCII, UTF-7 conversion is diabled leading to 
+       the 47kB reduction in the code size.
+
+5. Locale changes
   - patches/locale1.patch :
       Filipino, Amharic, and Swahili locales
       exemplar character set changes for CJK + 9 Indian locales
       Minor fixes for Danish, , Turkish, and Korean.
 
   - patches/locale2.patch :
       The minimum locale data Chrome needs for 47 languages Chrome is
       not localized to. Each locale data file has ExemplarCharacters,
       LocaleScript, layout, and the name of the language for a locale
       in its native language.
 
   - patches/locale3.patch : Locale build configuration files. They
     add reslocal.mk or {trns,sprep,rbnf,coll}local.mk files to
     source/data/{coll,curr,lang.locale,curr,region,translit,zone,rbnf,sprep}.
 
   - In source/data/region, run the following command to get rid of numeric region
     display names we don't use (everything other than 419).
      $ sed -i  '/[0-35-9][0-9][0-9]{/ d' *.txt
 
   - android/patch_locale.sh (to be run for Android build only):
       Makes changes to source/data/{curr,region,lang} to exclude these data
       except the language and script names of zh_Hans and zh_Hant.
  
   - Add tg.txt to source/data/locale source/data/lang to add the minimal locale
     data necessary for the spellchecker. In both directories, add tg.txt to
     reslocal.mk
 
-7. Removal of unihan collation tables from data/coll/{zh,ja,ko}.txt
+6. Removal of unihan collation tables from data/coll/{zh,ja,ko}.txt
 
-  - patches/unihan.patch:
-    unihan collation tables are never used in Chrome/Webkit, but it takes
-    about 1MB in the uncompressed ICU data file in ICU 4.2.1.
+  - run scripts/remove_unihan.sh
+    unihan collation tables are never used in Chrome/Blink, but it takes
+    about 1MB in the uncompressed ICU data file in ICU.
 
-8. Timezone data update
+7. Timezone data update
   - 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 2014, the latest version is 2014a and the above files
+   As of April 2014, the latest version is 2014b and the above files
    are available at
-   http://source.icu-project.org/repos/icu/data/trunk/tzdata/icunew/2014a/44/
+   http://source.icu-project.org/repos/icu/data/trunk/tzdata/icunew/2014b/44/
 
-9. Transliterator customization
+8. Transliterator customization
 
-   - Add el_Upper.txt taken from ICU 52 to source/data/trnslit
-
-   - Also add css3transform.txt to the same directory
+   - Also add css3transform.txt to source/data/trnslit.
    - Put the following line in trnslocal.mk
 
      TRANSLIT_SOURCE=css3transform.txt
 
-10. Build-related changes
+9. Build-related changes
 
   - patches/wpo.patch
-  - patches/vscomp.patch
-    (see http://bugs.icu-project.org/trac/ticket/8355 and
-         http://bugs.icu-project.org/trac/ticket/8356 )
-  - patches/rtti.patch : Make RTTI work without exception handling on Windows
-    (see http://bugs.icu-project.org/trac/ticket/8343)
+    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.
+     a. do not use WINDOWS_LOCALE_API in locmap.c
+     b. do not redefine stringpiece::npos
   - patches/data.build.patch :
-      To remove some data files we don't use and cut down the data size.
+      Remove unnecessary resources : invuca, unames, collator source, stringprep
   - patches/data.build.win.patch :
       Windows-only data build patch. Add a new target DATALIB to makedata.mak
-  - patches/clang.patch: To build with Clang.
-    (see http://bugs.icu-project.org/trac/ticket/8954 Two other chunks in
-    the patch have already been fixed in the ICU trunk.)
   - add an empty file (stubdatabuilt.txt) to source/stubdata
 
-11. Pre-built data libraries are checked in.
+10. Pre-built data files are checked in with the following steps on Linux:
 
-    Before building data file on Linux, re-run 'runConfigureICU Linux' again
-    if it's run without data.build.patch in #10 above.
+    a. Make a icu data build directory outside the Chromium source tree.
+    b. Run 'runConfigureICU Linux' outside the source tree.
+    c. Run 'make'
+    d. 'make' will fail in the 1st pass. Copy source/data/in/coll/invuca.icu
+      to {BUILD_DIR_ROOT}/data/out/build/icudt52l/coll and re-run 'make'
+      in {BUILD_DIR_ROOT}/data.
 
-    Because we removed layout and layoutex directories in step 3,
-    'runConfigureICU Linux' will fail even with '--disable-layout'. A
-    work-around is to have a copy of our icu tree in a separate build directory
-    and add back directories we removed in step 3 before
-    running 'runConfigure'.
-
-    'make' will fail in the 1st pass. Copy source/data/in/coll/invuca.icu
-    to {BUILD_DIR_ROOT}/data/out/build/icudt46l/coll and re-run 'make'
-    in {BUILD_DIR_ROOT}/data.
-
-    'make' will fail again when pkgdata looks for css3transform.res. Edit
+    e. 'make' will fail again when pkgdata looks for css3transform.res. Edit
     data/out/tmp/icudata.lst to replace 'css3transform.res' with 'root.res'.
     (see http://bugs.icu-project.org/trac/ticket/10570 ) and run 'make' again.
 
 
     - source/data/in/icudtl.dat : Built on Linux with all the patches
-      above applied. icudt46l.dat is generated in
+      above applied. icudt52l.dat is generated in
       {BUILD_DIR_ROOT}/data/out/tmp and copied to the above location with a
-      version number (46) dropped.
+      version number (52) dropped.
 
-    - windows/icudt.dll : With icudt46l.dat in place, all the patches applied
+    - windows/icudt.dll : With icudt52l.dat in place, all the patches applied
       and header files moved (#11 below), generated by building icudt_build
-      project of build/icudt_build.sln on Windows. icudt46.dll is
+      project of build/icudt_build.sln on Windows. icudt52.dll is
       generated in bin/{Release,Debug} and copied to windows/icudt.dll
-      and checked in. Note that we drop the version number ('46') from the
+      and checked in. Note that we drop the version number ('52') from the
       dll name to avoind having to update our build scripts/configuration
       files everytime ICU is upgraded to a new version.
 
-    - {mac,linux}/icudt46l_dat.S : Built on Linux with all the
+    - {mac,linux}/icudt52l_dat.S : Built on Linux with all the
       patches above (except android/brkitr.patch) applied and checked in.
       This file will be generated in {BUILD_DIR_ROOT}/data/out/tmp.
 
-      mac/icudt46l_dat.S is identical to linux/icudt46l_dat.S. It's made
+      mac/icudt52l_dat.S is identical to linux/icudt52l_dat.S. It's made
       by changing the header portion of the Linux version to read as following
       (no leading whitespace) :
 
-          .globl _icudt46_dat
+          .globl _icudt52_dat
           #ifdef U_HIDE_DATA_SYMBOL
-                 .private_extern _icudt46_dat
+                 .private_extern _icudt52_dat
           #endif
                  .data
                  .const
                  .align 4
-          _icudt46_dat:
+          _icudt52_dat:
 
 
-    - android/icudt46l_dat.S : Built on Linux with all the patches above and
+    - android/icudt52l_dat.S : Built on Linux with all the patches above and
       android/brkitr.patch applied and android/patch_locale.sh executed, and
       checked in.
-    - android/icudtl.dat : Generated as icudt46l.dat in
-      {BUILD_DIR_ROOT}/data/out/tmp along with icudt46l_dat.S and
-      copied to the above location with '46' dropped in its name.
+    - android/icudtl.dat : Generated as icudt52l.dat in
+      {BUILD_DIR_ROOT}/data/out/tmp along with icudt52l_dat.S and
+      copied to the above location with '52' dropped in its name.
 
 
-12. Apply the fix found with static analysis tools such as PSV and coverity
-
-  - patches/static.analysis.patch
-  - upstream trunk/4.8 do not have this code any more.
-
-13. Fix for msvs2010 applied:
---- D:/src/ent/src/third_party/icu/source/common/stringpiece.cpp
- (revision 78292)
-+++ D:/src/ent/src/third_party/icu/source/common/stringpiece.cpp
- (working copy)
-@@ -75,7 +75,7 @@
- * Visual Studios 9.0.
- * Cygwin with MSVC 9.0 also complains here about redefinition.
- */
--#if (!defined(_MSC_VER) || (_MSC_VER > 1500)) && !defined(CYGWINMSVC)
-+#if (!defined(_MSC_VER) || (_MSC_VER > 1600)) && !defined(CYGWINMSVC)
- const int32_t StringPiece::npos;
- #endif
-
-14. Fix for locales that don't use '.' as decimal separator: patches/nan.patch
-  - upstream bug: http://bugs.icu-project.org/trac/ticket/8561
-  - Handle other chars besides the dot. This is required because decNumber's
-    parser expects the dot as a decimal separator.
-  - Locales that don't use dot were producing "NaN" values.
-
-15. Fix a bug in the regex engine.
-  - patches/regex.patch
-  - upstream bug: http://bugs.icu-project.org/trac/ticket/8666 (fixed in the upstream)
-
-16. Apply the upstream patch for Korean search collator support (ICU 4.6.1).
-   - patches/search_collation.patch
-   - upstream bug: http://bugs.icu-project.org/trac/ticket/8290
-
-17. Fix a use of uninitialized memory bug in regular expression matching
-   - patches/rematch.patch
-   - upstream bug: http://bugs.icu-project.org/trac/ticket/8824
-
-18. Make it compile with -Werror on gcc 4.6
-   - patches/gcc46.patch (ToT upstream does not have this code any more).
-
-19. Fix four out of bounds memory access error in common/uloc.c
-    and common/uresbund.c
-   - patches/uloc.patch
-   - upstream bug:
-     1. http://bugs.icu-project.org/trac/ticket/8984 (_canonicalize)
-     2. http://bugs.icu-project.org/trac/ticket/9114 (_getKeywords)
-     3. http://bugs.icu-project.org/trac/ticket/8812 (uresbund)
-        http://bugs.icu-project.org/trac/ticket/8813 (uresbund)
-     4. http://bugs.icu-project.org/trac/ticket/10250 (_getKeywords)
-
-20. Fix a null pointer error in ubrk_setText in ubrk.cpp.
-    - patches/ubrk.patch
-    - upstream bug : http://bugs.icu-project.org/trac/ticket/9115
-
-21. Fix a clang warning in rbbi.cpp by merging in an upstream change.
-    - patches/changeset_30255.patch
-    - upstream change : http://bugs.icu-project.org/trac/changeset/30255
-
-22. Fix time zone handling and compilation on iOS.
-    - patches/ios_timezone.patch
-    - upstream bugs : http://bugs.icu-project.org/trac/ticket/9051
-                      http://bugs.icu-project.org/trac/ticket/8661
-
-23. Fix a buffer overflow in utext
-    - patches/utext.patch
-    - upstream change : http://bugs.icu-project.org/trac/changeset/29356
-
-24. Fix compilation errors on VS2012 and above.
-    - patches/vs2012.patch
-
-25. Fix a buffer overflow in UTF-16/32 detection.
-    - patches/csetdet.patch
-    - upstream bug: http://bugs.icu-project.org/trac/ticket/10318
-
-26. Add BreakIterator::getRuleStatus
-    - patches/breakiterator.patch
-    - Copy and paste BreakIterator::getRuleStatus API from ICU 52
-
-27. Change export of U_ICUDATA_ENTRY_POINT from U_IMPORT to U_EXPORT.
+11. Change export of U_ICUDATA_ENTRY_POINT from U_IMPORT to U_EXPORT.
     - patches/declspec.patch
-
-28. Add support for QNX Neutrino.
-    -  patches/platform.qnx.patch:
-       See #2 about the platform header generation.
-    -  patches/si_value.undef.patch:
-       Work around an all-lowercase macro defined in <signal.h>.
-       Upstream took a different approach:
-       http://bugs.icu-project.org/trac/ticket/9935
-    -  patches/xopen_source.patch:
-       Set _XOPEN_SOURCE to 600 as in the upstream changeset:
-       http://bugs.icu-project.org/trac/changeset/30418