unqlite_sys::unqlite_create_function

pub unsafe extern fn unqlite_create_function(pVm: *mut unqlite_vm, zName: *const c_char, xFunc: Option<extern fn(arg1: *mut unqlite_context, arg2: c_int, arg3: *mut *mut unqlite_value) -> c_int>, pUserData: *mut c_void) -> c_int