Run command with CJK-friendly wcwidth(3) to fix ambiguous width chars

• Copyright (c) 2013-2019 SATOH Fumiyasu @ OSS Technology Corp., Japan
• License: BSD-like (2-clause, see wcwidth.c)
• URL: https://GitHub.com/fumiyas/wcwidth-cjk
• Twitter: https://twitter.com/satoh_fumiyasu

What's this?

This is a $LD_PRELOAD-able library and a wrapper script to run a command with CJK-friendly wcwidth(3) implementation for fixing "East Asian Ambiguous Width Characters" problem.

日本語 (In Japanese): 「East Asian Ambiguous Width chars 問題」を 解決するための $LD_PRELOAD 可能な共有ライブラリーとラッパー スクリプトです。「α」などの「East Asian Ambiguous Width chars」の 表示や編集で問題が発生するコマンドをこの実装下で起動すると、 システム標準の wcwidth(3) が置き換えられ、問題を解消できます。

How to build

Required packages: autoconf, automake, libtool, make, cc (gcc or misc)

$ sh autogen.sh
$ ./configure --prefix=/usr/local
$ make
$ sudo make install

Usage

Run a command with $LD_PRELOAD-able library:

$ export LD_PRELOAD=/usr/local/lib/wcwidth-cjk.so
$ exec zsh -l
...

or:

$ eval `/usr/local/bin/wcwidth-cjk --sh-init`
$ exec zsh -l
...

Run a command via wrapper script:

$ /usr/local/bin/wcwidth Ab漢α¥
1 00 00 00 41   A
1 00 00 00 62   b
2 00 00 6F 22   漢
1 00 00 03 B1   α
1 00 00 00 A5   ¥
$ /usr/local/bin/wcwidth-cjk /usr/local/bin/wcwidth Ab漢α¥
1 00 00 00 41   A
1 00 00 00 62   b
2 00 00 6F 22   漢
2 00 00 03 B1   α
1 00 00 00 A5   ¥
$ exec /usr/local/bin/wcwidth-cjk zsh -l
...

References

• East Asian Ambiguous Width chars problem
  • http://sourceware.org/bugzilla/show_bug.cgi?id=4335
  • http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=471021
  • http://d.hatena.ne.jp/vmi/20090523/p1
  • http://d.hatena.ne.jp/vmi/20090524/p1
  • http://d.hatena.ne.jp/vmi/20090526/p1
  • http://d.hatena.ne.jp/vmi/20090604/p1
  • http://ta.ps.st/d/1331733974.html
  • http://vdr.jp/d/20070326.html
• CJK-friendly wcwidth(3) (wcwidth_cjk() in wcwidth.c):
  • http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
  • ftp://ftp.mutt.org/mutt/devel/
  • http://www.emaillab.org/mutt/download1521.html
  • https://twitter.com/ttkzw/status/341958235814768640
  • https://twitter.com/ttkzw/status/341954474333581313
  • https://twitter.com/ttkzw/status/341960339300159488
• hamano/locale-eaw: East Asian Ambiguous Width問題の修正ロケール
  • https://github.com/hamano/locale-eaw
• Emoji - Wikipedia, the free encyclopedia
  • https://en.wikipedia.org/wiki/Emoji
• uwabami/locale-eaw-emoji: UAX#11 Ambiguous と UTR #51 Emoiji を全角とする修正 locale
  • https://github.com/uwabami/locale-eaw-emoji