freebsd-skq/usr.bin/localedef
Baptiste Daroussin d79cdd21de libc: Fix (and improve) nl_langinfo (CODESET)
The output of "locale charmap" is identical to the result of
nl_langinfo (CODESET) for any given locale.  The logic for returning the
codeset was very simplistic.  It just returned portion of the locale name
after the period (e.g. en_FR.ISO8859-1 returned "ISO8859-1").

When softlinks were added to locales, this broke.  e.g.:
   en_US returned ""
   en_FR.UTF8 returned "UTF8"
   en_FR.UTF-8 returned "UTF-8"
   zh_Hant_HK.Big5HKSCS returned "Big5HKSCS"
   zh_Hant_TW.Big5 returned "Big5"
   es_ES@euro returned ""

In order to fix this properly, the named locale cannot be used to
determine the encoding.  This information was almost available in the
rune data.  Unfortunately, all the single byte encodings were listed
as "NONE" encoding.

So I adjusted localedef tool to provide more information about the
encoding.  For example, instead of "NONE", the LC_CTYPE used by
fr_FR.ISO8859-15 is now encoded as "NONE:ISO8859-15".  The locale
handlers now check if the first four characters of the encoding is
"NONE" and if so, treats it as a single-byte encoding.

The nl_langinfo handling of CODESET was adjusting accordingly.  Now the
following is returned:
   en_US returns "ISO8859-1"
   fr_FR.UTF8 returns "UTF-8"
   fr_FR.UTF-8 returns "UTF-8"
   zh_Hant_HK.Big5HKSCS returns "Big5"
   zh_Hant_TW.Big5 returns "Big5"
   es_ES@euro returns "ISO8859-15"

as before, "C" and "POSIX" locales return "US-ASCII".  This is a big
improvement.  The result of nl_langinfo can never be a zero-length
string and it will always exclusively one of the values of the
character maps of /usr/src/tools/tools/locale/etc/final-maps.

Submitted by:	marino
Obtained from:	DragonflyBSD
2015-11-01 12:00:55 +00:00
..
charmap.c
collate.c
ctype.c Actually only T_ISDIGIT should be flagged as _E4 2015-10-19 14:48:31 +00:00
localedef.1
localedef.c
localedef.h
Makefile
messages.c
monetary.c
numeric.c
parser.y
README
scanner.c
time.c
wide.c libc: Fix (and improve) nl_langinfo (CODESET) 2015-11-01 12:00:55 +00:00

While there are tools called "localedef" in Solaris and Linux, this
tool does not share heritage with any other implementation.  It was
written independently by Garrett D'Amore while employed at Nexenta
Systems, and thus carries the Nexenta Copyright.

It was initially released under the CDDL license, but on 4 July 2014,
Nexenta reissued the source under the BSD 2-clause license.  This
code is part of the Illumos project.

see:
https://github.com/Nexenta/illumos-nexenta/commit/cf17542a37fc83d0ae093777e30d480423858c29