1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
use std::marker::PhantomData;
use crate::codec3 as mqtt;
use bytestring::ByteString;
pub struct Subscribe {
topics: Vec<(ByteString, mqtt::QoS)>,
codes: Vec<mqtt::SubscribeReturnCode>,
}
pub struct SubscribeResult {
pub(crate) codes: Vec<mqtt::SubscribeReturnCode>,
}
impl Subscribe {
pub(crate) fn new(topics: Vec<(ByteString, mqtt::QoS)>) -> Self {
let mut codes = Vec::with_capacity(topics.len());
(0..topics.len()).for_each(|_| codes.push(mqtt::SubscribeReturnCode::Failure));
Self { topics, codes }
}
#[inline]
pub fn iter_mut(&mut self) -> SubscribeIter {
SubscribeIter {
subs: self as *const _ as *mut _,
entry: 0,
lt: PhantomData,
}
}
#[inline]
pub fn into_result(self) -> SubscribeResult {
SubscribeResult { codes: self.codes }
}
}
impl<'a> IntoIterator for &'a mut Subscribe {
type Item = Subscription<'a>;
type IntoIter = SubscribeIter<'a>;
fn into_iter(self) -> SubscribeIter<'a> {
self.iter_mut()
}
}
pub struct SubscribeIter<'a> {
subs: *mut Subscribe,
entry: usize,
lt: PhantomData<&'a mut Subscribe>,
}
impl<'a> SubscribeIter<'a> {
fn next_unsafe(&mut self) -> Option<Subscription<'a>> {
let subs = unsafe { &mut *self.subs };
if self.entry < subs.topics.len() {
let s = Subscription {
topic: &subs.topics[self.entry].0,
qos: subs.topics[self.entry].1,
code: &mut subs.codes[self.entry],
};
self.entry += 1;
Some(s)
} else {
None
}
}
}
impl<'a> Iterator for SubscribeIter<'a> {
type Item = Subscription<'a>;
#[inline]
fn next(&mut self) -> Option<Subscription<'a>> {
self.next_unsafe()
}
}
pub struct Subscription<'a> {
topic: &'a ByteString,
qos: mqtt::QoS,
code: &'a mut mqtt::SubscribeReturnCode,
}
impl<'a> Subscription<'a> {
#[inline]
pub fn topic(&self) -> &'a ByteString {
&self.topic
}
#[inline]
pub fn qos(&self) -> mqtt::QoS {
self.qos
}
#[inline]
pub fn fail(&mut self) {
*self.code = mqtt::SubscribeReturnCode::Failure
}
#[inline]
pub fn subscribe(&mut self, qos: mqtt::QoS) {
*self.code = mqtt::SubscribeReturnCode::Success(qos)
}
}
pub struct Unsubscribe {
topics: Vec<ByteString>,
}
impl Unsubscribe {
pub(crate) fn new(topics: Vec<ByteString>) -> Self {
Self { topics }
}
pub fn iter(&self) -> impl Iterator<Item = &ByteString> {
self.topics.iter()
}
}