ceph-csi/vendor/github.com/google/uuid/version7.go
dependabot[bot] b2ae48dc2d rebase: bump the github-dependencies group with 5 updates
Bumps the github-dependencies group with 5 updates:

| Package | From | To |
| --- | --- | --- |
| [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) | `1.49.0` | `1.49.13` |
| [github.com/aws/aws-sdk-go-v2/service/sts](https://github.com/aws/aws-sdk-go-v2) | `1.26.5` | `1.26.6` |
| [github.com/google/uuid](https://github.com/google/uuid) | `1.4.0` | `1.5.0` |
| [github.com/kubernetes-csi/csi-lib-utils](https://github.com/kubernetes-csi/csi-lib-utils) | `0.14.0` | `0.17.0` |
| [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) | `1.17.0` | `1.18.0` |


Updates `github.com/aws/aws-sdk-go` from 1.49.0 to 1.49.13
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Commits](https://github.com/aws/aws-sdk-go/compare/v1.49.0...v1.49.13)

Updates `github.com/aws/aws-sdk-go-v2/service/sts` from 1.26.5 to 1.26.6
- [Release notes](https://github.com/aws/aws-sdk-go-v2/releases)
- [Commits](https://github.com/aws/aws-sdk-go-v2/compare/service/s3/v1.26.5...service/s3/v1.26.6)

Updates `github.com/google/uuid` from 1.4.0 to 1.5.0
- [Release notes](https://github.com/google/uuid/releases)
- [Changelog](https://github.com/google/uuid/blob/master/CHANGELOG.md)
- [Commits](https://github.com/google/uuid/compare/v1.4.0...v1.5.0)

Updates `github.com/kubernetes-csi/csi-lib-utils` from 0.14.0 to 0.17.0
- [Release notes](https://github.com/kubernetes-csi/csi-lib-utils/releases)
- [Commits](https://github.com/kubernetes-csi/csi-lib-utils/compare/v0.14.0...v0.17.0)

Updates `github.com/prometheus/client_golang` from 1.17.0 to 1.18.0
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prometheus/client_golang/compare/v1.17.0...v1.18.0)

---
updated-dependencies:
- dependency-name: github.com/aws/aws-sdk-go
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-dependencies
- dependency-name: github.com/aws/aws-sdk-go-v2/service/sts
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-dependencies
- dependency-name: github.com/google/uuid
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-dependencies
- dependency-name: github.com/kubernetes-csi/csi-lib-utils
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-dependencies
- dependency-name: github.com/prometheus/client_golang
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>
2024-01-03 21:23:15 +00:00

76 lines
2.5 KiB
Go

// Copyright 2023 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import (
"io"
)
// UUID version 7 features a time-ordered value field derived from the widely
// implemented and well known Unix Epoch timestamp source,
// the number of milliseconds seconds since midnight 1 Jan 1970 UTC, leap seconds excluded.
// As well as improved entropy characteristics over versions 1 or 6.
//
// see https://datatracker.ietf.org/doc/html/draft-peabody-dispatch-new-uuid-format-03#name-uuid-version-7
//
// Implementations SHOULD utilize UUID version 7 over UUID version 1 and 6 if possible.
//
// NewV7 returns a Version 7 UUID based on the current time(Unix Epoch).
// Uses the randomness pool if it was enabled with EnableRandPool.
// On error, NewV7 returns Nil and an error
func NewV7() (UUID, error) {
uuid, err := NewRandom()
if err != nil {
return uuid, err
}
makeV7(uuid[:])
return uuid, nil
}
// NewV7FromReader returns a Version 7 UUID based on the current time(Unix Epoch).
// it use NewRandomFromReader fill random bits.
// On error, NewV7FromReader returns Nil and an error.
func NewV7FromReader(r io.Reader) (UUID, error) {
uuid, err := NewRandomFromReader(r)
if err != nil {
return uuid, err
}
makeV7(uuid[:])
return uuid, nil
}
// makeV7 fill 48 bits time (uuid[0] - uuid[5]), set version b0111 (uuid[6])
// uuid[8] already has the right version number (Variant is 10)
// see function NewV7 and NewV7FromReader
func makeV7(uuid []byte) {
/*
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| unix_ts_ms |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| unix_ts_ms | ver | rand_a |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|var| rand_b |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| rand_b |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
_ = uuid[15] // bounds check
t := timeNow().UnixMilli()
uuid[0] = byte(t >> 40)
uuid[1] = byte(t >> 32)
uuid[2] = byte(t >> 24)
uuid[3] = byte(t >> 16)
uuid[4] = byte(t >> 8)
uuid[5] = byte(t)
uuid[6] = 0x70 | (uuid[6] & 0x0F)
// uuid[8] has already has right version
}