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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
#![feature(maybe_uninit_slice)]
use libc::{c_char, c_void, size_t};
use std::mem::MaybeUninit;
use std::vec::Vec;
pub trait TxBuffer {
fn len(&self) -> usize;
fn as_c_void(&self) -> (*const c_void, size_t);
fn as_c_char(&self) -> (*const c_char, size_t);
}
impl TxBuffer for Vec<u8> {
fn len(&self) -> usize {
self.len()
}
fn as_c_void(&self) -> (*const c_void, size_t) {
(self.as_ptr() as *mut c_void, self.len())
}
fn as_c_char(&self) -> (*const c_char, size_t) {
(self.as_ptr() as *mut c_char, self.len())
}
}
impl<const N: usize> TxBuffer for [u8; N] {
fn len(&self) -> usize {
N
}
fn as_c_void(&self) -> (*const c_void, size_t) {
(self.as_ptr() as *mut c_void, self.len())
}
fn as_c_char(&self) -> (*const c_char, size_t) {
(self.as_ptr() as *mut c_char, self.len())
}
}
pub trait RxBuffer {
fn capacity(&self) -> usize;
fn as_c_void(&mut self) -> (*mut c_void, size_t);
fn as_c_char(&mut self) -> (*mut c_char, size_t);
unsafe fn done(&mut self, len: size_t) -> &mut [u8];
#[inline]
fn can_set_capacity(&mut self) -> Option<&mut dyn ResizeableBuffer> {
None
}
}
impl RxBuffer for Vec<u8> {
fn capacity(&self) -> usize {
self.capacity()
}
fn as_c_void(&mut self) -> (*mut c_void, size_t) {
(self.as_mut_ptr() as *mut c_void, self.capacity())
}
fn as_c_char(&mut self) -> (*mut c_char, size_t) {
(self.as_mut_ptr() as *mut c_char, self.capacity())
}
unsafe fn done(&mut self, len: usize) -> &mut [u8] {
assert!(len <= self.capacity());
self.set_len(len);
&mut self[..len]
}
#[inline]
fn can_set_capacity(&mut self) -> Option<&mut dyn ResizeableBuffer> {
Some(self)
}
}
impl<const N: usize> RxBuffer for [u8; N] {
fn capacity(&self) -> usize {
N
}
fn as_c_void(&mut self) -> (*mut c_void, size_t) {
(self.as_mut_ptr() as *mut c_void, N)
}
fn as_c_char(&mut self) -> (*mut c_char, size_t) {
(self.as_mut_ptr() as *mut c_char, N)
}
unsafe fn done(&mut self, len: usize) -> &mut [u8] {
&mut self[..len]
}
}
impl<const N: usize> RxBuffer for [MaybeUninit<u8>; N] {
fn capacity(&self) -> usize {
N
}
fn as_c_void(&mut self) -> (*mut c_void, size_t) {
(self.as_mut_ptr() as *mut c_void, N)
}
fn as_c_char(&mut self) -> (*mut c_char, size_t) {
(self.as_mut_ptr() as *mut c_char, N)
}
unsafe fn done(&mut self, len: usize) -> &mut [u8] {
MaybeUninit::slice_assume_init_mut(&mut self[..len])
}
}
pub trait ResizeableBuffer {
fn set_capacity(&mut self, len: usize);
}
impl ResizeableBuffer for Vec<u8> {
fn set_capacity(&mut self, len: usize) {
if self.capacity() < len {
self.reserve(len - self.len());
};
}
}