struct lconv *localeconv(void);

The members of the structure with type char * are strings. Any of these, except for decimal_point, can point to an empty string, "", to indicate that the value is not available in the current locale or is of zero length.

The members with type char are non-negative numbers. Any of the members can be CHAR_MAX to indicate that the value is not available in the current locale.

This function is not thread-safe, because it uses an internal static buffer. _get_lconv() provides a thread-safe alternative.

The function returns a pointer to the filled-in object. The structure pointed to by the return value is not modified by the program, but might be overwritten by a subsequent call to the localeconv() function. In addition, calls to the setlocale() function with categories LC_ALL, LC_MONETARY, or LC_NUMERIC might overwrite the contents of the structure.