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POSIX doesn’t like the OPTU encoding scheme due to btowc/mbtowc asymmetry,

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so make all utf8-mode behaviour implementation-defined (and document the
raw octet mapping more explicitly)
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tg
2015-07-10 19:35:39 +00:00
parent 0fd9337123
commit fd37f4baf0
1 changed files with 15 additions and 6 deletions
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21
mksh.1
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@ -1,4 +1,4 @@
.\" $MirOS: src/bin/mksh/mksh.1,v 1.376 2015/07/10 18:41:07 tg Exp $ .\" $MirOS: src/bin/mksh/mksh.1,v 1.377 2015/07/10 19:35:39 tg Exp $
.\" $OpenBSD: ksh.1,v 1.160 2015/07/04 13:27:04 feinerer Exp $ .\" $OpenBSD: ksh.1,v 1.160 2015/07/04 13:27:04 feinerer Exp $
.\"- .\"-
.\" Copyright © 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, .\" Copyright © 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
@ -6441,9 +6441,6 @@ The complete legalese is at:
.\" .\"
.Sh CAVEATS .Sh CAVEATS
.Nm .Nm
only supports the Unicode BMP (Basic Multilingual Plane).
.Pp
.Nm
has a different scope model from has a different scope model from
.At .At
.Nm ksh , .Nm ksh ,
@ -6488,8 +6485,20 @@ For the purpose of
supports only the supports only the
.Dq C .Dq C
locale. locale.
For users of UTF-8 locales, the following sh code makes the shell .Nm mksh Ns 's
match the locale: .Ic utf8\-mode
only supports the Unicode BMP (Basic Multilingual Plane) and maps
raw octets into the U+EF80..U+EFFF wide character range; compare
.Sx Arithmetic expressions .
The following
.Tn POSIX
.Nm sh
code toggles the
.Ic utf8\-mode
option dependent on the current
.Tn POSIX
locale for mksh to allow using the UTF-8 mode, within the constraints
outlined above, in code portable across various shell implementations:
.Bd -literal -offset indent .Bd -literal -offset indent
case ${KSH_VERSION:\-} in case ${KSH_VERSION:\-} in
*MIRBSD\ KSH*\*(Ba*LEGACY\ KSH*) *MIRBSD\ KSH*\*(Ba*LEGACY\ KSH*)