Function xmlRegisterInputCallbacks 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlRegisterInputCallbacks(
    matchFunc: Option<unsafe extern "C" fn(filename: *const c_char) -> c_int>,
    openFunc: Option<unsafe extern "C" fn(filename: *const c_char) -> *mut c_void>,
    readFunc: Option<xmlInputReadCallback>,
    closeFunc: Option<xmlInputCloseCallback>,
) -> c_int

Register a new set of input I/O callbacks.

UPSTREAM-PARITY

int xmlRegisterInputCallbacks(xmlInputMatchCallback matchFunc,
                              xmlInputOpenCallback openFunc,
                              xmlInputReadCallback readFunc,
                              xmlInputCloseCallback closeFunc);