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
156
157
158
159
160
161
162
163
164
use bytes::Bytes;
use std::convert::TryFrom;
use std::str::Utf8Error;
#[non_exhaustive]
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct StrBytes {
bytes: Bytes,
}
impl StrBytes {
fn new(bytes: Bytes) -> Self {
StrBytes { bytes }
}
pub fn as_bytes(&self) -> &Bytes {
&self.bytes
}
pub fn as_str(&self) -> &str {
unsafe { std::str::from_utf8_unchecked(&self.bytes[..]) }
}
pub fn try_copy_from_slice(slice: &[u8]) -> Result<Self, Utf8Error> {
match std::str::from_utf8(slice) {
Ok(_) => Ok(StrBytes::new(Bytes::copy_from_slice(slice))),
Err(err) => Err(err),
}
}
pub fn copy_from_str(string: &str) -> Self {
StrBytes::new(Bytes::copy_from_slice(string.as_bytes()))
}
}
#[cfg(feature = "derive-arbitrary")]
impl<'a> arbitrary::Arbitrary<'a> for StrBytes {
fn arbitrary(unstruct: &mut arbitrary::Unstructured<'a>) -> arbitrary::Result<Self> {
Ok(String::arbitrary(unstruct)?.into())
}
}
impl From<String> for StrBytes {
fn from(value: String) -> Self {
StrBytes::new(Bytes::from(value))
}
}
impl From<&'static str> for StrBytes {
fn from(value: &'static str) -> Self {
StrBytes::new(Bytes::from(value))
}
}
impl TryFrom<&'static [u8]> for StrBytes {
type Error = Utf8Error;
fn try_from(value: &'static [u8]) -> Result<Self, Self::Error> {
match std::str::from_utf8(value) {
Ok(_) => Ok(StrBytes::new(Bytes::from(value))),
Err(err) => Err(err),
}
}
}
impl TryFrom<Vec<u8>> for StrBytes {
type Error = Utf8Error;
fn try_from(value: Vec<u8>) -> Result<Self, Self::Error> {
match std::str::from_utf8(&value[..]) {
Ok(_) => Ok(StrBytes::new(Bytes::from(value))),
Err(err) => Err(err),
}
}
}
impl TryFrom<Bytes> for StrBytes {
type Error = Utf8Error;
fn try_from(bytes: Bytes) -> Result<Self, Self::Error> {
match std::str::from_utf8(&bytes[..]) {
Ok(_) => Ok(StrBytes::new(bytes)),
Err(err) => Err(err),
}
}
}
#[cfg(test)]
mod tests {
use crate::str_bytes::StrBytes;
use bytes::Bytes;
use std::convert::TryInto;
use std::str::Utf8Error;
#[test]
fn invalid_utf8_correctly_errors() {
let invalid_utf8 = &[0xC3, 0x28][..];
assert!(std::str::from_utf8(invalid_utf8).is_err());
let result: Result<StrBytes, Utf8Error> = invalid_utf8.try_into();
assert!(result.is_err());
let result: Result<StrBytes, Utf8Error> = invalid_utf8.to_vec().try_into();
assert!(result.is_err());
let result: Result<StrBytes, Utf8Error> = Bytes::from_static(invalid_utf8).try_into();
assert!(result.is_err());
}
#[test]
fn valid_utf8() {
let valid_utf8 = "hello";
let str_bytes: StrBytes = valid_utf8.into();
assert_eq!(valid_utf8.as_bytes(), str_bytes.as_bytes());
assert_eq!(valid_utf8, str_bytes.as_str());
assert_eq!(valid_utf8, str_bytes.clone().as_str());
}
#[test]
fn equals() {
let str_bytes: StrBytes = "test".into();
assert_eq!(str_bytes, str_bytes);
let other_bytes: StrBytes = "foo".into();
assert_ne!(str_bytes, other_bytes);
}
}