Re: default value of degree_sign on Japanese env.

[Bastian M. <bma...@we...>]

For the currently active locale you could also simply use wcrtomb() to 
convert.

   Bastian

Am 04.11.2011 08:54, schrieb Shigeharu TAKENO:
> shige 11/04 2011
> ----------------
>
> Ethan A Merritt<sf...@us...>  wrote:
> | I have revised the new code to use iconv() if it is available.
> | I tested under linux by setting the locale to ja_JP.EUC-JP,
> | which causes it to emit the character sequence \241 \353 (octal)
> | which is 0xA1EB (hexidecimal).  But I don't have any EUC-JP fonts
> | installed, so I cannot confirm if this is correct.
>
> The code 0xA1EB is correct for EUC-JP.
>
> Well, I think the idea
>
> +    if (locale) {
> +       /* This should work even if gnuplot doesn't understand the encoding */
> +       char *encoding = strchr(locale, '.');
> +       if (encoding) {
> +           encoding++; /* Step past the dot in, e.g., ja_JP.EUC-JP */
>
> of src/set.c is not so good, since substrings of locale name
> after '.' may not proper name of the character encoding. For
> example, in Solaris 9,
>
>    EUC-JP enconding locale name = "ja", "ja_JP.EUC", "ja_JP.eucJP"
>    Shift_JIS encoding locale name = "ja_JP.PCK"
>    UTF-8 encoding locale name = "ja_JP.UTF-8"
>
> To obtain encoding codeset name of current locale, there seems to
> be two methods:
>
> 1) Use nl_langinfo(CODESET) (#include<langinfo.h>)
> 2) Use locale_charset() (#include<localcharset.h>) in libcharset,
>    which is included in GNU libiconv.
>
> cf. http://www.haible.de/bruno/packages-libcharset.html
>
> On Solaris 9, nl_langinfo(CODESET) of system library returns:
>
>    locale = ja, ja_JP.eucJP =>  "eucJP"
>    locale = ja_JP.PCK =>  "PCK"
>
> and locale_charset() of GNU libcharset returns:
>
>    locale = ja, ja_JP.eucJP =>  "EUC-JP"
>    locale = ja_JP.PCK =>  "SHIFT_JIS"
>
> I think that names returned by locale_charset() may be better,
> but libcharset may not be installed in default.
>
>
> | If you build the new code, you can test it by saying
> |    set encoding locale
> |    show decimal
>
> Though it puts a incorrect string on "ja" locale, it works fine
> on "ja_JP.eucJP" locale since iconv library admits "eucJP".
>
> +========================================================+
>   Shigeharu TAKENO     NIigata Institute of Technology
>                         kashiwazaki,Niigata 945-1195 JAPAN
>   sh...@ie...   TEL(&FAX): +81-257-22-8161
> +========================================================+