wstring
_Messages_impl::do_get(catalog thecat,
int set, int p_id, const wstring& dfault) const
{
typedef ctype<wchar_t> wctype;
const wctype& ct = use_facet<wctype>(_M_map->lookup(thecat));
const char* str = _Locale_catgets(_M_message_obj, thecat, set, p_id, "");
// Verify that the lookup failed; an empty string might represent success.
if (!str)
return dfault;
else if (str[0] == '\0') {
const char* str2 = _Locale_catgets(_M_message_obj, thecat, set, p_id, "*");
if (!str2 || strcmp(str2, "*") == 0)
return dfault;
}
// str is correct. Now we must widen it to get a wstring.
size_t n = strlen(str);
// NOT PORTABLE. What we're doing relies on internal details of the
// string implementation. (Contiguity of string elements.)
wstring result(n, wchar_t(0));
ct.widen(str, str + n, &*result.begin());
return result;
}
string messages<char>::do_get(catalog cat,
int set, int p_id, const string& dfault) const
{
return _M_message_obj != 0 && cat >= 0
? string(_Locale_catgets(_M_message_obj, cat, set, p_id, dfault.c_str()))
: dfault;
}
