nl_langinfo-language information
#include <nl_types.h>
#include <langinfo.h>
char *nl_langinfo (nl_item item);
nl_langinfo returns a pointer to a null-terminated string containing information relevant to a particular language or cultural area defined in the programs locale. The manifest constant names and values of item are defined by langinfo.h.
For example:
nl_langinfo (ABDAY_1);
would return a pointer to the string "Dim" if the identified language was French and a French locale was correctly installed; or "Sun" if the identified language was English.
If setlocale(3) has not been called successfully, or if langinfo(5) data for a supported language is either not available or item is not defined therein, then nl_langinfo returns a pointer to the corresponding string in the C locale. In all locales, nl_langinfo returns a pointer to an empty string if item contains an invalid setting.
The array pointed to by the return value should not be modified by the program. Subsequent calls to nl_langinfo may overwrite the array.
setlocale(3), strftime(3), langinfo(5), nl_types(5).