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_langinfo(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
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
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.
The following error can occur, among others:
Not enough memory available.
The return type ought to be const char *, but is char * to avoid
warnings in C code predating ANSI C.