diff options
Diffstat (limited to 'vendor/github.com/segmentio/analytics-go/Godeps/_workspace/src/github.com/xtgo/uuid/uuid.go')
| -rw-r--r-- | vendor/github.com/segmentio/analytics-go/Godeps/_workspace/src/github.com/xtgo/uuid/uuid.go | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/vendor/github.com/segmentio/analytics-go/Godeps/_workspace/src/github.com/xtgo/uuid/uuid.go b/vendor/github.com/segmentio/analytics-go/Godeps/_workspace/src/github.com/xtgo/uuid/uuid.go deleted file mode 100644 index a0fd7a5a5..000000000 --- a/vendor/github.com/segmentio/analytics-go/Godeps/_workspace/src/github.com/xtgo/uuid/uuid.go +++ /dev/null @@ -1,204 +0,0 @@ -// Copyright (c) 2012 The gocql Authors. 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 can be used to generate and parse universally unique -// identifiers, a standardized format in the form of a 128 bit number. -// -// http://tools.ietf.org/html/rfc4122 -package uuid - -import ( - "crypto/rand" - "encoding/hex" - "errors" - "io" - "net" - "strconv" - "time" -) - -type UUID [16]byte - -var hardwareAddr []byte - -const ( - VariantNCSCompat = 0 - VariantIETF = 2 - VariantMicrosoft = 6 - VariantFuture = 7 -) - -func init() { - if interfaces, err := net.Interfaces(); err == nil { - for _, i := range interfaces { - if i.Flags&net.FlagLoopback == 0 && len(i.HardwareAddr) > 0 { - hardwareAddr = i.HardwareAddr - break - } - } - } - if hardwareAddr == nil { - // If we failed to obtain the MAC address of the current computer, - // we will use a randomly generated 6 byte sequence instead and set - // the multicast bit as recommended in RFC 4122. - hardwareAddr = make([]byte, 6) - _, err := io.ReadFull(rand.Reader, hardwareAddr) - if err != nil { - panic(err) - } - hardwareAddr[0] = hardwareAddr[0] | 0x01 - } -} - -// Parse parses a 32 digit hexadecimal number (that might contain hyphens) -// representing an UUID. -func Parse(input string) (UUID, error) { - var u UUID - j := 0 - for i := 0; i < len(input); i++ { - b := input[i] - switch { - default: - fallthrough - case j == 32: - goto err - case b == '-': - continue - case '0' <= b && b <= '9': - b -= '0' - case 'a' <= b && b <= 'f': - b -= 'a' - 10 - case 'A' <= b && b <= 'F': - b -= 'A' - 10 - } - u[j/2] |= b << byte(^j&1<<2) - j++ - } - if j == 32 { - return u, nil - } -err: - return UUID{}, errors.New("invalid UUID " + strconv.Quote(input)) -} - -// FromBytes converts a raw byte slice to an UUID. It will panic if the slice -// isn't exactly 16 bytes long. -func FromBytes(input []byte) UUID { - var u UUID - if len(input) != 16 { - panic("UUIDs must be exactly 16 bytes long") - } - copy(u[:], input) - return u -} - -// NewRandom generates a totally random UUID (version 4) as described in -// RFC 4122. -func NewRandom() UUID { - var u UUID - io.ReadFull(rand.Reader, u[:]) - u[6] &= 0x0F // clear version - u[6] |= 0x40 // set version to 4 (random uuid) - u[8] &= 0x3F // clear variant - u[8] |= 0x80 // set to IETF variant - return u -} - -var timeBase = time.Date(1582, time.October, 15, 0, 0, 0, 0, time.UTC).Unix() - -// NewTime generates a new time based UUID (version 1) as described in RFC -// 4122. This UUID contains the MAC address of the node that generated the -// UUID, a timestamp and a sequence number. -func NewTime() UUID { - var u UUID - - now := time.Now().In(time.UTC) - t := uint64(now.Unix()-timeBase)*10000000 + uint64(now.Nanosecond()/100) - u[0], u[1], u[2], u[3] = byte(t>>24), byte(t>>16), byte(t>>8), byte(t) - u[4], u[5] = byte(t>>40), byte(t>>32) - u[6], u[7] = byte(t>>56)&0x0F, byte(t>>48) - - var clockSeq [2]byte - io.ReadFull(rand.Reader, clockSeq[:]) - u[8] = clockSeq[1] - u[9] = clockSeq[0] - - copy(u[10:], hardwareAddr) - - u[6] |= 0x10 // set version to 1 (time based uuid) - u[8] &= 0x3F // clear variant - u[8] |= 0x80 // set to IETF variant - - return u -} - -// String returns the UUID in it's canonical form, a 32 digit hexadecimal -// number in the form of xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx. -func (u UUID) String() string { - buf := [36]byte{8: '-', 13: '-', 18: '-', 23: '-'} - hex.Encode(buf[0:], u[0:4]) - hex.Encode(buf[9:], u[4:6]) - hex.Encode(buf[14:], u[6:8]) - hex.Encode(buf[19:], u[8:10]) - hex.Encode(buf[24:], u[10:]) - return string(buf[:]) -} - -// Bytes returns the raw byte slice for this UUID. A UUID is always 128 bits -// (16 bytes) long. -func (u UUID) Bytes() []byte { - return u[:] -} - -// Variant returns the variant of this UUID. This package will only generate -// UUIDs in the IETF variant. -func (u UUID) Variant() int { - x := u[8] - switch byte(0) { - case x & 0x80: - return VariantNCSCompat - case x & 0x40: - return VariantIETF - case x & 0x20: - return VariantMicrosoft - } - return VariantFuture -} - -// Version extracts the version of this UUID variant. The RFC 4122 describes -// five kinds of UUIDs. -func (u UUID) Version() int { - return int(u[6] & 0xF0 >> 4) -} - -// Node extracts the MAC address of the node who generated this UUID. It will -// return nil if the UUID is not a time based UUID (version 1). -func (u UUID) Node() []byte { - if u.Version() != 1 { - return nil - } - return u[10:] -} - -// Timestamp extracts the timestamp information from a time based UUID -// (version 1). -func (u UUID) Timestamp() uint64 { - if u.Version() != 1 { - return 0 - } - return uint64(u[0])<<24 + uint64(u[1])<<16 + uint64(u[2])<<8 + - uint64(u[3]) + uint64(u[4])<<40 + uint64(u[5])<<32 + - uint64(u[7])<<48 + uint64(u[6]&0x0F)<<56 -} - -// Time is like Timestamp, except that it returns a time.Time. -func (u UUID) Time() time.Time { - t := u.Timestamp() - if t == 0 { - return time.Time{} - } - sec := t / 10000000 - nsec := t - sec - return time.Unix(int64(sec)+timeBase, int64(nsec)) -} |