Function xmloxide_set_attribute 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmloxide_set_attribute(
    doc: *mut Document,
    node: u32,
    name: *const c_char,
    value: *const c_char,
) -> i32

Sets an attribute on an element node. Returns 1 on success, 0 on failure.

If the attribute already exists, its value is updated.

Safety

doc must be a valid mutable document pointer. name and value must be valid null-terminated UTF-8 strings.