1 files changed, 75 insertions, 0 deletions

diff --git a/vendor/github.com/google/uuid/version7.go b/vendor/github.com/google/uuid/version7.go
new file mode 100644
index 0000000..ba9dd5e
--- /dev/null
+++ b/vendor/github.com/google/uuid/version7.go
@@ -0,0 +1,75 @@
+// 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
+}