default value of degree_sign on Japanese env.

[Shigeharu T. <sh...@ie...>]

shige 11/02 2011
----------------

Recently, variable degree_sign with encoding is introduced. But, 
I think it has a problem for Japanese environment.

There are 3 encoding systems we use normaly in Japan, Shift_JIS
for most of MS-Win user, EUC-JP for many unix user, and UTF-8.

Current version of gnuplot has support for Shift_JIS encoding 
because the Shift_JIS Japanese characters have a singular 
feature that the 2nd byte of them may be 7bit code (0x40-0x7E).

We have not need care of EUC encoding in gnuplot because all 
bytes of EUC-JP Japanese characters are 8bit code (0x8E,0x8F,
and 0xA1-0xFE).

However, newly introduced degree_sign has a default value of 
8bit code 0260 (0xB0), which is a proper code of iso-8859-1 
encoding, but is not recognized in EUC-JP encoding.

To solve the problem, to make the new encoding support for 
EUC-JP, or to set the default value of degree_sign to 7bit
character strings, I think.

+========================================================+
 Shigeharu TAKENO     NIigata Institute of Technology
                       kashiwazaki,Niigata 945-1195 JAPAN
 sh...@ie...   TEL(&FAX): +81-257-22-8161
+========================================================+