diff options
| -rw-r--r-- | winsup/doc/ChangeLog | 7 | ||||
| -rw-r--r-- | winsup/doc/new-features.sgml | 5 | ||||
| -rw-r--r-- | winsup/doc/setup2.sgml | 21 |
3 files changed, 21 insertions, 12 deletions
diff --git a/winsup/doc/ChangeLog b/winsup/doc/ChangeLog index 0471c985a..c067992e7 100644 --- a/winsup/doc/ChangeLog +++ b/winsup/doc/ChangeLog @@ -1,3 +1,10 @@ +2010-10-18 Andy Koppe <andy.koppe@gmail.com> + + * setup2.sgml (setup-locale-ov): Document CJK ambiguous width change + for non-Unicode charsets. + * new-features.sgml (ov-new1.7.8): Mention CJK ambiguous width change. + Drop redundant NT4 pre-SP4 support entry. + 2010-10-09 Corinna Vinschen <corinna@vinschen.de> * new-features.sgml (ov-new1.7.8): Document reinstantiation of the diff --git a/winsup/doc/new-features.sgml b/winsup/doc/new-features.sgml index 060bde941..3fb109963 100644 --- a/winsup/doc/new-features.sgml +++ b/winsup/doc/new-features.sgml @@ -35,7 +35,10 @@ Drop support for Windows NT4 prior to Service Pack 4. </para></listitem> <listitem><para> -Drop support for Windows NT4 prior to Service Pack 4. +Fix the width of "CJK Ambiguous Width" characters to 1 for singlebyte charsets +and 2 for East Asian multibyte charsets. (For UTF-8, it remains dependent on +the specified language, and the "@cjknarrow" locale modifier can still be used +to force width 1.) </para></listitem> </itemizedlist> diff --git a/winsup/doc/setup2.sgml b/winsup/doc/setup2.sgml index 62904ae6b..e3127bd20 100644 --- a/winsup/doc/setup2.sgml +++ b/winsup/doc/setup2.sgml @@ -353,17 +353,16 @@ With the "@cyrillic" modifier it's UTF-8. <listitem><para> There's a class of characters in the Unicode character set, called the -"CJK Ambiguous Width Character set". For these characters the width -returned by the wcwidth/wcswidth function is usually 1. This is often a -problem in East-Asian languages, which historically use character sets -in which these characters have a width of 2. By default, the -wcwidth/wcswidth functions return 1 as the width of these characters, -except if the language is specifed as "ja" (Japanese), "ko" (Korean), or -"zh" (Chinese). In these languages wcwidth and wcswidth return 2 for -these characters. This is not correct in all circumstances, so the user -of one of these languages can specify the modifier "@cjknarrow", which -modifies the behaviour of wcwidth/wcswidth to return 1 for the ambiguous -width characters. +"CJK Ambiguous Width" characters. For these characters, the width +returned by the wcwidth/wcswidth functions is usually 1. This can be a +problem with East-Asian languages, which historically use character sets +where these characters have a width of 2. Therefore, wcwidth/wcswidth +return 2 as the width of these characters when an East-Asian charset such +as GBK or SJIS is selected, or when UTF-8 is selected and the language is +specified as "zh" (Chinese), "ja" (Japanese), or "ko" (Korean). This is +not correct in all circumstances, hence the locale modifier "@cjknarrow" +can be used to force wcwidth/wcswidth to return 1 for the ambiguous width +characters. </para></listitem> </itemizedlist> |