Function xmlOpenCharEncodingHandler 

#[unsafe(no_mangle)]
pub extern "C" fn xmlOpenCharEncodingHandler(
    name: *const c_char,
    output: c_int,
    out: *mut *mut c_void,
) -> c_int

Find or create an encoding handler by name for one conversion direction.

UPSTREAM-PARITY

xmlParserErrors xmlOpenCharEncodingHandler(const char *name, int output,
                                           xmlCharEncodingHandler **out);