iterator.rs

pub struct NvList {
    ptr: *mut sys::nvlist_t,
}

pub struct NvPair {
    ptr: *mut sys::nvpair_t,
}

impl NvPair {
    pub unsafe fn from_ptr(ptr: *mut sys::nvpair_t) -> NvPair {
        NvPair {
            ptr
        }
    }
}

pub struct Iter<'a> {
    list:&'a NvList,
    position: *mut sys::nvpair_t,
}

impl<'a> Iterator for Iter<'a> {
    type Item = &'a NvPair;

    fn next(&mut self) -> Option<Self::Item> {
        let next = unsafe { sys::nvlist_next_nvpair(self.list.as_ptr(), self.position) };
        self.position = next;
        if next.is_null() {
            None
        } else {
            Some(unsafe { &'a NvPair::from_ptr(next) })
        }
    }
}