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
use alloc::vec::Vec;
use core::{
convert::TryFrom,
fmt::{self, Display, Formatter},
num::ParseIntError,
};
#[cfg(feature = "datasize")]
use datasize::DataSize;
use serde::{Deserialize, Serialize};
use crate::bytesrepr::{self, Error, FromBytes, ToBytes, U32_SERIALIZED_LENGTH};
pub const SEM_VER_SERIALIZED_LENGTH: usize = 3 * U32_SERIALIZED_LENGTH;
#[derive(
Copy, Clone, Debug, Default, Hash, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize,
)]
#[cfg_attr(feature = "datasize", derive(DataSize))]
pub struct SemVer {
pub major: u32,
pub minor: u32,
pub patch: u32,
}
impl SemVer {
pub const V1_0_0: SemVer = SemVer {
major: 1,
minor: 0,
patch: 0,
};
pub const fn new(major: u32, minor: u32, patch: u32) -> SemVer {
SemVer {
major,
minor,
patch,
}
}
}
impl ToBytes for SemVer {
fn to_bytes(&self) -> Result<Vec<u8>, Error> {
let mut ret = bytesrepr::unchecked_allocate_buffer(self);
ret.append(&mut self.major.to_bytes()?);
ret.append(&mut self.minor.to_bytes()?);
ret.append(&mut self.patch.to_bytes()?);
Ok(ret)
}
fn serialized_length(&self) -> usize {
SEM_VER_SERIALIZED_LENGTH
}
}
impl FromBytes for SemVer {
fn from_bytes(bytes: &[u8]) -> Result<(Self, &[u8]), Error> {
let (major, rem): (u32, &[u8]) = FromBytes::from_bytes(bytes)?;
let (minor, rem): (u32, &[u8]) = FromBytes::from_bytes(rem)?;
let (patch, rem): (u32, &[u8]) = FromBytes::from_bytes(rem)?;
Ok((SemVer::new(major, minor, patch), rem))
}
}
impl Display for SemVer {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(f, "{}.{}.{}", self.major, self.minor, self.patch)
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum ParseSemVerError {
InvalidVersionFormat,
ParseIntError(ParseIntError),
}
impl Display for ParseSemVerError {
fn fmt(&self, formatter: &mut Formatter) -> fmt::Result {
match self {
ParseSemVerError::InvalidVersionFormat => formatter.write_str("invalid version format"),
ParseSemVerError::ParseIntError(error) => error.fmt(formatter),
}
}
}
impl From<ParseIntError> for ParseSemVerError {
fn from(error: ParseIntError) -> ParseSemVerError {
ParseSemVerError::ParseIntError(error)
}
}
impl TryFrom<&str> for SemVer {
type Error = ParseSemVerError;
fn try_from(value: &str) -> Result<SemVer, Self::Error> {
let tokens: Vec<&str> = value.split('.').collect();
if tokens.len() != 3 {
return Err(ParseSemVerError::InvalidVersionFormat);
}
Ok(SemVer {
major: tokens[0].parse()?,
minor: tokens[1].parse()?,
patch: tokens[2].parse()?,
})
}
}
#[cfg(test)]
mod tests {
use super::*;
use core::convert::TryInto;
#[test]
fn should_compare_semver_versions() {
assert!(SemVer::new(0, 0, 0) < SemVer::new(1, 2, 3));
assert!(SemVer::new(1, 1, 0) < SemVer::new(1, 2, 0));
assert!(SemVer::new(1, 0, 0) < SemVer::new(1, 2, 0));
assert!(SemVer::new(1, 0, 0) < SemVer::new(1, 2, 3));
assert!(SemVer::new(1, 2, 0) < SemVer::new(1, 2, 3));
assert!(SemVer::new(1, 2, 3) == SemVer::new(1, 2, 3));
assert!(SemVer::new(1, 2, 3) >= SemVer::new(1, 2, 3));
assert!(SemVer::new(1, 2, 3) <= SemVer::new(1, 2, 3));
assert!(SemVer::new(2, 0, 0) >= SemVer::new(1, 99, 99));
assert!(SemVer::new(2, 0, 0) > SemVer::new(1, 99, 99));
}
#[test]
fn parse_from_string() {
let ver1: SemVer = "100.20.3".try_into().expect("should parse");
assert_eq!(ver1, SemVer::new(100, 20, 3));
let ver2: SemVer = "0.0.1".try_into().expect("should parse");
assert_eq!(ver2, SemVer::new(0, 0, 1));
assert!(SemVer::try_from("1.a.2.3").is_err());
assert!(SemVer::try_from("1. 2.3").is_err());
assert!(SemVer::try_from("12345124361461.0.1").is_err());
assert!(SemVer::try_from("1.2.3.4").is_err());
assert!(SemVer::try_from("1.2").is_err());
assert!(SemVer::try_from("1").is_err());
assert!(SemVer::try_from("0").is_err());
}
}