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version.go
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version.go
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package version
// Copyright (c) Microsoft Corporation.
// Licensed under the Apache License 2.0.
import (
"encoding/json"
"fmt"
"regexp"
"strconv"
"strings"
)
var rxVersion = regexp.MustCompile(`^(\d+)\.(\d+)\.(\d+)(.*)`)
type Version struct {
V [3]uint32
Suffix string
}
func (v *Version) String() string {
return fmt.Sprintf("%d.%d.%d%s", v.V[0], v.V[1], v.V[2], v.Suffix)
}
func (v *Version) MarshalJSON() ([]byte, error) {
return json.Marshal(v.String())
}
func NewVersion(vs ...uint32) *Version {
v := &Version{}
copy(v.V[:], vs)
return v
}
func ParseVersion(vsn string) (*Version, error) {
m := rxVersion.FindStringSubmatch(strings.TrimSpace(vsn))
if m == nil {
return nil, fmt.Errorf("could not parse version %q", vsn)
}
v := &Version{
Suffix: m[4],
}
for i := 0; i < 3; i++ {
d, err := strconv.ParseUint(m[i+1], 10, 32)
if err != nil {
return nil, err
}
v.V[i] = uint32(d)
}
return v, nil
}
func (v *Version) Lt(w *Version) bool {
for i := 0; i < 3; i++ {
switch {
case v.V[i] < w.V[i]:
return true
case v.V[i] > w.V[i]:
return false
}
}
return false
}
func (v *Version) Eq(w *Version) bool {
for i := 0; i < 3; i++ {
if v.V[i] != w.V[i] {
return false
}
}
return v.Suffix == w.Suffix
}
func (v *Version) MinorVersion() string {
return fmt.Sprintf("%d.%d", v.V[0], v.V[1])
}