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-rw-r--r--vendor/github.com/google/uuid/version4.go38
1 files changed, 38 insertions, 0 deletions
diff --git a/vendor/github.com/google/uuid/version4.go b/vendor/github.com/google/uuid/version4.go
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+++ b/vendor/github.com/google/uuid/version4.go
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+// Copyright 2016 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"
+
+// New creates a new random UUID or panics. New is equivalent to
+// the expression
+//
+// uuid.Must(uuid.NewRandom())
+func New() UUID {
+ return Must(NewRandom())
+}
+
+// NewRandom returns a Random (Version 4) UUID.
+//
+// The strength of the UUIDs is based on the strength of the crypto/rand
+// package.
+//
+// A note about uniqueness derived from the UUID Wikipedia entry:
+//
+// Randomly generated UUIDs have 122 random bits. One's annual risk of being
+// hit by a meteorite is estimated to be one chance in 17 billion, that
+// means the probability is about 0.00000000006 (6 × 10−11),
+// equivalent to the odds of creating a few tens of trillions of UUIDs in a
+// year and having one duplicate.
+func NewRandom() (UUID, error) {
+ var uuid UUID
+ _, err := io.ReadFull(rander, uuid[:])
+ if err != nil {
+ return Nil, err
+ }
+ uuid[6] = (uuid[6] & 0x0f) | 0x40 // Version 4
+ uuid[8] = (uuid[8] & 0x3f) | 0x80 // Variant is 10
+ return uuid, nil
+}