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
|
/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.sts.common.util;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/** Tools for parsing kernel version strings */
public final class KernelVersion implements Comparable<KernelVersion> {
public final int version;
public final int patchLevel;
public final int subLevel;
public KernelVersion(int version, int patchLevel, int subLevel) {
this.version = version;
this.patchLevel = patchLevel;
this.subLevel = subLevel;
}
/**
* Parse a kernel version string in the format "version.patchlevel.sublevel" - "5.4.123".
* Trailing values are ignored so `uname -r` can be parsed properly.
*
* @param versionString The version string to parse
*/
public static KernelVersion parse(String versionString) {
Pattern kernelReleasePattern =
Pattern.compile("(?<version>\\d+)\\.(?<patchLevel>\\d+)\\.(?<subLevel>\\d+)(.*)");
Matcher matcher = kernelReleasePattern.matcher(versionString);
if (matcher.find()) {
return new KernelVersion(
Integer.parseInt(matcher.group("version")),
Integer.parseInt(matcher.group("patchLevel")),
Integer.parseInt(matcher.group("subLevel")));
}
throw new IllegalArgumentException(
String.format("Could not parse kernel version string (%s)", versionString));
}
/** {@inheritDoc} */
@Override
public int hashCode() {
// 2147483647 (INT_MAX)
// vvppppssss
return version * 10000000 + patchLevel * 10000 + subLevel;
}
/** Compare by version, patchlevel, and sublevel in that order. */
public int compareTo(KernelVersion o) {
if (version != o.version) {
return Integer.compare(version, o.version);
}
if (patchLevel != o.patchLevel) {
return Integer.compare(patchLevel, o.patchLevel);
}
return Integer.compare(subLevel, o.subLevel);
}
/** {@inheritDoc} */
@Override
public boolean equals(Object o) {
if (o instanceof KernelVersion) {
return this.compareTo((KernelVersion) o) == 0;
}
return false;
}
/** Format as "version.patchlevel.sublevel" */
@Override
public String toString() {
return String.format("%d.%d.%d", version, patchLevel, subLevel);
}
/** Format as "version.patchlevel" */
public String toStringShort() {
return String.format("%d.%d", version, patchLevel);
}
}
|
