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refactor uuid

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This commit is contained in:
Darien Raymond 2017-02-22 11:59:01 +01:00
parent 55186c1917
commit 31a21bef08
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GPG Key ID: 7251FFA14BB18169
1 changed files with 35 additions and 37 deletions
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72
common/uuid/uuid.go
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@ -5,6 +5,7 @@ import (
"crypto/md5"
"crypto/rand"
"encoding/hex"
"v2ray.com/core/common/errors"
)
@ -15,42 +16,8 @@ var (
type UUID [16]byte
// String returns the string representation of this UUID.
func (v *UUID) String() string {
return bytesToString(v.Bytes())
}
// Bytes returns the bytes representation of this UUID.
func (v *UUID) Bytes() []byte {
return v[:]
}
// Equals returns true if this UUID equals another UUID by value.
func (v *UUID) Equals(another *UUID) bool {
if v == nil && another == nil {
return true
}
if v == nil || another == nil {
return false
}
return bytes.Equal(v.Bytes(), another.Bytes())
}
// Next generates a deterministic random UUID based on this UUID.
func (v *UUID) Next() *UUID {
md5hash := md5.New()
md5hash.Write(v.Bytes())
md5hash.Write([]byte("16167dc8-16b6-4e6d-b8bb-65dd68113a81"))
newid := new(UUID)
for {
md5hash.Sum(newid[:0])
if !newid.Equals(v) {
return newid
}
md5hash.Write([]byte("533eff8a-4113-4b10-b5ce-0f5d76b98cd2"))
}
}
func bytesToString(bytes []byte) string {
func (u *UUID) String() string {
bytes := u.Bytes()
result := hex.EncodeToString(bytes[0 : byteGroups[0]/2])
start := byteGroups[0] / 2
for i := 1; i < len(byteGroups); i++ {
@ -62,6 +29,37 @@ func bytesToString(bytes []byte) string {
return result
}
// Bytes returns the bytes representation of this UUID.
func (u *UUID) Bytes() []byte {
return u[:]
}
// Equals returns true if this UUID equals another UUID by value.
func (u *UUID) Equals(another *UUID) bool {
if u == nil && another == nil {
return true
}
if u == nil || another == nil {
return false
}
return bytes.Equal(u.Bytes(), another.Bytes())
}
// Next generates a deterministic random UUID based on this UUID.
func (u *UUID) Next() *UUID {
md5hash := md5.New()
md5hash.Write(u.Bytes())
md5hash.Write([]byte("16167dc8-16b6-4e6d-b8bb-65dd68113a81"))
newid := new(UUID)
for {
md5hash.Sum(newid[:0])
if !newid.Equals(u) {
return newid
}
md5hash.Write([]byte("533eff8a-4113-4b10-b5ce-0f5d76b98cd2"))
}
}
// New creates an UUID with random value.
func New() *UUID {
uuid := new(UUID)
@ -69,7 +67,7 @@ func New() *UUID {
return uuid
}
// PraseBytes converts an UUID in byte form to object.
// ParseBytes converts an UUID in byte form to object.
func ParseBytes(b []byte) (*UUID, error) {
if len(b) != 16 {
return nil, errors.New("Invalid UUID: ", b)