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author | Christopher Speller <crspeller@gmail.com> | 2016-05-12 15:08:58 -0400 |
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committer | Christopher Speller <crspeller@gmail.com> | 2016-05-12 16:37:29 -0400 |
commit | 84d2482ddbff9564c9ad75b2d30af66e3ddfd44d (patch) | |
tree | 8bfa567d2b6381f4a996ada2deff8a16aa85a3ac /Godeps/_workspace/src/github.com/pborman/uuid/time.go | |
parent | d1efb66ad7b017f0fbfe6f0c20843b30f396e504 (diff) | |
download | chat-84d2482ddbff9564c9ad75b2d30af66e3ddfd44d.tar.gz chat-84d2482ddbff9564c9ad75b2d30af66e3ddfd44d.tar.bz2 chat-84d2482ddbff9564c9ad75b2d30af66e3ddfd44d.zip |
Updating go depencancies. Switching to go1.6 vendoring (#2949)
Diffstat (limited to 'Godeps/_workspace/src/github.com/pborman/uuid/time.go')
-rw-r--r-- | Godeps/_workspace/src/github.com/pborman/uuid/time.go | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/Godeps/_workspace/src/github.com/pborman/uuid/time.go b/Godeps/_workspace/src/github.com/pborman/uuid/time.go deleted file mode 100644 index 7ebc9bef1..000000000 --- a/Godeps/_workspace/src/github.com/pborman/uuid/time.go +++ /dev/null @@ -1,132 +0,0 @@ -// Copyright 2014 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 ( - "encoding/binary" - "sync" - "time" -) - -// A Time represents a time as the number of 100's of nanoseconds since 15 Oct -// 1582. -type Time int64 - -const ( - lillian = 2299160 // Julian day of 15 Oct 1582 - unix = 2440587 // Julian day of 1 Jan 1970 - epoch = unix - lillian // Days between epochs - g1582 = epoch * 86400 // seconds between epochs - g1582ns100 = g1582 * 10000000 // 100s of a nanoseconds between epochs -) - -var ( - mu sync.Mutex - lasttime uint64 // last time we returned - clock_seq uint16 // clock sequence for this run - - timeNow = time.Now // for testing -) - -// UnixTime converts t the number of seconds and nanoseconds using the Unix -// epoch of 1 Jan 1970. -func (t Time) UnixTime() (sec, nsec int64) { - sec = int64(t - g1582ns100) - nsec = (sec % 10000000) * 100 - sec /= 10000000 - return sec, nsec -} - -// GetTime returns the current Time (100s of nanoseconds since 15 Oct 1582) and -// clock sequence as well as adjusting the clock sequence as needed. An error -// is returned if the current time cannot be determined. -func GetTime() (Time, uint16, error) { - defer mu.Unlock() - mu.Lock() - return getTime() -} - -func getTime() (Time, uint16, error) { - t := timeNow() - - // If we don't have a clock sequence already, set one. - if clock_seq == 0 { - setClockSequence(-1) - } - now := uint64(t.UnixNano()/100) + g1582ns100 - - // If time has gone backwards with this clock sequence then we - // increment the clock sequence - if now <= lasttime { - clock_seq = ((clock_seq + 1) & 0x3fff) | 0x8000 - } - lasttime = now - return Time(now), clock_seq, nil -} - -// ClockSequence returns the current clock sequence, generating one if not -// already set. The clock sequence is only used for Version 1 UUIDs. -// -// The uuid package does not use global static storage for the clock sequence or -// the last time a UUID was generated. Unless SetClockSequence a new random -// clock sequence is generated the first time a clock sequence is requested by -// ClockSequence, GetTime, or NewUUID. (section 4.2.1.1) sequence is generated -// for -func ClockSequence() int { - defer mu.Unlock() - mu.Lock() - return clockSequence() -} - -func clockSequence() int { - if clock_seq == 0 { - setClockSequence(-1) - } - return int(clock_seq & 0x3fff) -} - -// SetClockSeq sets the clock sequence to the lower 14 bits of seq. Setting to -// -1 causes a new sequence to be generated. -func SetClockSequence(seq int) { - defer mu.Unlock() - mu.Lock() - setClockSequence(seq) -} - -func setClockSequence(seq int) { - if seq == -1 { - var b [2]byte - randomBits(b[:]) // clock sequence - seq = int(b[0])<<8 | int(b[1]) - } - old_seq := clock_seq - clock_seq = uint16(seq&0x3fff) | 0x8000 // Set our variant - if old_seq != clock_seq { - lasttime = 0 - } -} - -// Time returns the time in 100s of nanoseconds since 15 Oct 1582 encoded in -// uuid. It returns false if uuid is not valid. The time is only well defined -// for version 1 and 2 UUIDs. -func (uuid UUID) Time() (Time, bool) { - if len(uuid) != 16 { - return 0, false - } - time := int64(binary.BigEndian.Uint32(uuid[0:4])) - time |= int64(binary.BigEndian.Uint16(uuid[4:6])) << 32 - time |= int64(binary.BigEndian.Uint16(uuid[6:8])&0xfff) << 48 - return Time(time), true -} - -// ClockSequence returns the clock sequence encoded in uuid. It returns false -// if uuid is not valid. The clock sequence is only well defined for version 1 -// and 2 UUIDs. -func (uuid UUID) ClockSequence() (int, bool) { - if len(uuid) != 16 { - return 0, false - } - return int(binary.BigEndian.Uint16(uuid[8:10])) & 0x3fff, true -} |