bind_textdomain_codeset 函数

BIND_TEXTDOMAIN_CODESET(3)

NAME
       bind_textdomain_codeset - set encoding of message translations

SYNOPSIS
       #include 

       char * bind_textdomain_codeset (const char * domainname,
                                       const char * codeset);

DESCRIPTION
       The bind_textdomain_codeset function sets the output codeset for message catalogs for domain domainname.

       A message domain is a set of translatable msgid messages. Usually, every software package has its own message domain.

       By  default,  the  gettext  family of functions returns translated messages in the locale's character encoding, which can be retrieved as nl_lang‐
       info(CODESET). The need for calling bind_textdomain_codeset arises for programs which store strings in a locale independent way (e.g.  UTF-8)  and
       want to avoid an extra character set conversion on the returned translated messages.

       domainname must be a non-empty string.

       If  codeset is not NULL, it must be a valid encoding name which can be used for the iconv_open function. The bind_textdomain_codeset function sets
       the output codeset for message catalogs belonging to domain domainname to codeset. The function makes copies of the argument strings as needed.

       If codeset is NULL, the function returns the previously set codeset for domain domainname. The default is NULL, denoting  the  locale's  character
       encoding.

RETURN VALUE
       If  successful,  the bind_textdomain_codeset function returns the current codeset for domain domainname, after possibly changing it. The resulting
       string is valid until the next bind_textdomain_codeset call for the same domainname and must not be modified or  freed.  If  a  memory  allocation
       failure occurs, it sets errno to ENOMEM and returns NULL. If no codeset has been set for domain domainname, it returns NULL.

ERRORS
       The following error can occur, among others:

       ENOMEM Not enough memory available.

BUGS
       The return type ought to be const char *, but is char * to avoid warnings in C code predating ANSI C.

SEE ALSO
       gettext(3), dgettext(3), dcgettext(3), ngettext(3), dngettext(3), dcngettext(3), textdomain(3), nl_langinfo(3), iconv_open(3)