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-rw-r--r--vendor/github.com/kevinburke/go.uuid/uuid.go161
1 files changed, 161 insertions, 0 deletions
diff --git a/vendor/github.com/kevinburke/go.uuid/uuid.go b/vendor/github.com/kevinburke/go.uuid/uuid.go
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+// Copyright (C) 2013-2018 by Maxim Bublis <b@codemonkey.ru>
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// Package uuid provides implementation of Universally Unique Identifier (UUID).
+// Supported versions are 1, 3, 4 and 5 (as specified in RFC 4122) and
+// version 2 (as specified in DCE 1.1).
+package uuid
+
+import (
+ "bytes"
+ "encoding/hex"
+)
+
+// Size of a UUID in bytes.
+const Size = 16
+
+// UUID representation compliant with specification
+// described in RFC 4122.
+type UUID [Size]byte
+
+// UUID versions
+const (
+ _ byte = iota
+ V1
+ V2
+ V3
+ V4
+ V5
+)
+
+// UUID layout variants.
+const (
+ VariantNCS byte = iota
+ VariantRFC4122
+ VariantMicrosoft
+ VariantFuture
+)
+
+// UUID DCE domains.
+const (
+ DomainPerson = iota
+ DomainGroup
+ DomainOrg
+)
+
+// String parse helpers.
+var (
+ urnPrefix = []byte("urn:uuid:")
+ byteGroups = []int{8, 4, 4, 4, 12}
+)
+
+// Nil is special form of UUID that is specified to have all
+// 128 bits set to zero.
+var Nil = UUID{}
+
+// Predefined namespace UUIDs.
+var (
+ NamespaceDNS = Must(FromString("6ba7b810-9dad-11d1-80b4-00c04fd430c8"))
+ NamespaceURL = Must(FromString("6ba7b811-9dad-11d1-80b4-00c04fd430c8"))
+ NamespaceOID = Must(FromString("6ba7b812-9dad-11d1-80b4-00c04fd430c8"))
+ NamespaceX500 = Must(FromString("6ba7b814-9dad-11d1-80b4-00c04fd430c8"))
+)
+
+// Equal returns true if u1 and u2 equals, otherwise returns false.
+func Equal(u1 UUID, u2 UUID) bool {
+ return bytes.Equal(u1[:], u2[:])
+}
+
+// Version returns algorithm version used to generate UUID.
+func (u UUID) Version() byte {
+ return u[6] >> 4
+}
+
+// Variant returns UUID layout variant.
+func (u UUID) Variant() byte {
+ switch {
+ case (u[8] >> 7) == 0x00:
+ return VariantNCS
+ case (u[8] >> 6) == 0x02:
+ return VariantRFC4122
+ case (u[8] >> 5) == 0x06:
+ return VariantMicrosoft
+ case (u[8] >> 5) == 0x07:
+ fallthrough
+ default:
+ return VariantFuture
+ }
+}
+
+// Bytes returns bytes slice representation of UUID.
+func (u UUID) Bytes() []byte {
+ return u[:]
+}
+
+// Returns canonical string representation of UUID:
+// xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
+func (u UUID) String() string {
+ buf := make([]byte, 36)
+
+ hex.Encode(buf[0:8], u[0:4])
+ buf[8] = '-'
+ hex.Encode(buf[9:13], u[4:6])
+ buf[13] = '-'
+ hex.Encode(buf[14:18], u[6:8])
+ buf[18] = '-'
+ hex.Encode(buf[19:23], u[8:10])
+ buf[23] = '-'
+ hex.Encode(buf[24:], u[10:])
+
+ return string(buf)
+}
+
+// SetVersion sets version bits.
+func (u *UUID) SetVersion(v byte) {
+ u[6] = (u[6] & 0x0f) | (v << 4)
+}
+
+// SetVariant sets variant bits.
+func (u *UUID) SetVariant(v byte) {
+ switch v {
+ case VariantNCS:
+ u[8] = (u[8]&(0xff>>1) | (0x00 << 7))
+ case VariantRFC4122:
+ u[8] = (u[8]&(0xff>>2) | (0x02 << 6))
+ case VariantMicrosoft:
+ u[8] = (u[8]&(0xff>>3) | (0x06 << 5))
+ case VariantFuture:
+ fallthrough
+ default:
+ u[8] = (u[8]&(0xff>>3) | (0x07 << 5))
+ }
+}
+
+// Must is a helper that wraps a call to a function returning (UUID, error)
+// and panics if the error is non-nil. It is intended for use in variable
+// initializations such as
+// var packageUUID = uuid.Must(uuid.FromString("123e4567-e89b-12d3-a456-426655440000"));
+func Must(u UUID, err error) UUID {
+ if err != nil {
+ panic(err)
+ }
+ return u
+}