1use std::ops::Drop;
2use std::rc::Rc;
3
4use ffi;
5use utils::ToStr;
6use Database;
7
8#[derive(Debug)]
9pub struct ConfigPairsPtr(*mut ffi::notmuch_config_pairs_t);
10
11#[derive(Clone, Debug)]
12pub struct ConfigPairs {
13 ptr: Rc<ConfigPairsPtr>,
14 _owner: Database,
15}
16
17impl Drop for ConfigPairsPtr {
18 fn drop(&mut self) {
19 unsafe { ffi::notmuch_config_pairs_destroy(self.0) };
20 }
21}
22
23impl ConfigPairs {
24 pub(crate) fn from_ptr(ptr: *mut ffi::notmuch_config_pairs_t, owner: Database) -> ConfigPairs {
25 ConfigPairs {
26 ptr: Rc::new(ConfigPairsPtr(ptr)),
27 _owner: owner,
28 }
29 }
30}
31
32impl Iterator for ConfigPairs {
33 type Item = (String, Option<String>);
34
35 fn next(&mut self) -> Option<Self::Item> {
36 let valid = unsafe { ffi::notmuch_config_pairs_valid(self.ptr.0) };
37
38 if valid == 0 {
39 return None;
40 }
41
42 let (k, v) = unsafe {
43 let k = ffi::notmuch_config_pairs_key(self.ptr.0);
44 let v = ffi::notmuch_config_pairs_value(self.ptr.0);
45
46 ffi::notmuch_config_pairs_move_to_next(self.ptr.0);
47
48 (k, v)
49 };
50
51 let value = if v.is_null() {
52 None
53 } else {
54 Some(v.to_string_lossy().to_string())
55 };
56
57 Some((k.to_string_lossy().to_string(), value))
58 }
59}