upper()/lower() truncates the result under Japanese Windows

Hi,

Upper(), lower() or initcap() function truncates the result
under Japanese Windows with e.g. the server encoding=UTF-8
and the LC_CTYPE setting Japanese_japan.932 .

Below is an example.

$ psql
psql (8.4devel)
Type "help" for help.

inoue=# \encoding sjis

inoue=# show server_encoding;
server_encoding
-----------------
UTF8
(1 行)

inoue=# show LC_CTYPE;
lc_ctype
--------------------
Japanese_Japan.932
(1 行)

inoue=# \set jpnstr '''カタカナ'''
inoue=# select char_length(:jpnstr);
char_length
-------------
4
(1 行)

inoue=# select upper(:jpnstr);
upper
--------
カタカ
(1 行)

inoue=# select char_length(upper(:jpnstr));
char_length
-------------
3
(1 行)

The output of the last command should be 4 not 3.
Attached is a patch to fix the bug.
After applying the patch the result is

inoue=# select upper(:jpnstr);
upper
----------
カタカナ
(1 行)

inoue=# select char_length(upper(:jpnstr));
char_length
-------------
4
(1 行)

regards,
Hiroshi Inoue