1use std::ffi::CString;
2use std::fmt;
3use std::marker::PhantomData;
4use std::ops::Deref;
5
6use super::immutable;
7use ffi::*;
8
9pub struct Ref<'a> {
10 ptr: *mut AVDictionary,
11 imm: immutable::Ref<'a>,
12
13 _marker: PhantomData<&'a ()>,
14}
15
16impl<'a> Ref<'a> {
17 pub unsafe fn wrap(ptr: *mut AVDictionary) -> Self {
18 Ref {
19 ptr,
20 imm: immutable::Ref::wrap(ptr),
21 _marker: PhantomData,
22 }
23 }
24
25 pub unsafe fn as_mut_ptr(&self) -> *mut AVDictionary {
26 self.ptr
27 }
28}
29
30impl<'a> Ref<'a> {
31 pub fn set(&mut self, key: &str, value: &str) {
32 unsafe {
33 let key: CString = CString::new(key).unwrap();
34 let value: CString = CString::new(value).unwrap();
35 let mut ptr: *mut {unknown} = self.as_mut_ptr();
36
37 if av_dict_set(&mut ptr, key.as_ptr(), value.as_ptr(), 0) < 0 {
38 panic!("out of memory");
39 }
40
41 self.ptr = ptr;
42 self.imm = immutable::Ref::wrap(ptr);
43 }
44 }
45}
46
47impl<'a> Deref for Ref<'a> {
48 type Target = immutable::Ref<'a>;
49
50 fn deref(&self) -> &Self::Target {
51 &self.imm
52 }
53}
54
55impl<'a> fmt::Debug for Ref<'a> {
56 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
57 self.imm.fmt(fmt)
58 }
59}
60