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1// @(#)root/base:$Id$
2// Author: Fons Rademakers 30/9/2001
5 * Copyright (C) 1995-2001, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
12#ifndef ROOT_TUUID
13#define ROOT_TUUID
16// //
17// TUUID //
18// //
19// This class defines a UUID (Universally Unique IDentifier), also //
20// known as GUIDs (Globally Unique IDentifier). A UUID is 128 bits //
21// long, and if generated according to this algorithm, is either //
22// guaranteed to be different from all other UUIDs/GUIDs generated //
23// until 3400 A.D. or extremely likely to be different. UUIDs were //
24// originally used in the Network Computing System (NCS) and //
25// later in the Open Software Foundation's (OSF) Distributed Computing //
26// Environment (DCE). //
27// //
30#ifdef WIN32
31#undef GetCurrentTime
33#include "Rtypes.h"
35// forward declaration
36class TBuffer;
37class TFile;
38class TDirectory;
39class TInetAddress;
40class TDatime;
42class TUUID {
45 UInt_t fUUIDIndex; //!index in the list of UUIDs in TProcessUUID
46 UInt_t fTimeLow; // 60 bit time, lower 32 bits
47 UShort_t fTimeMid; // middle 16 time bits
48 UShort_t fTimeHiAndVersion; // high 12 time bits + 4 UUID version bits
49 UChar_t fClockSeqHiAndReserved; // high 6 clock bits + 2 bits reserved
50 UChar_t fClockSeqLow; // low 8 clock bits
51 UChar_t fNode[6]; // 6 node id bytes
53 struct uuid_time_t {
56 };
59 void Format(UShort_t clockseq, uuid_time_t ts);
60 void GetNodeIdentifier();
61 void GetCurrentTime(uuid_time_t *timestamp);
62 void GetSystemTime(uuid_time_t *timestamp);
63 void GetRandomInfo(UChar_t seed[16]);
64 void SetFromString(const char *uuid_str);
67 TUUID();
68 TUUID(const char *uuid_str);
69 virtual ~TUUID();
71 const char *AsString() const;
72 Int_t Compare(const TUUID &u) const;
73 UShort_t Hash() const;
74 void Print() const;
76 TDatime GetTime() const;
77 void GetUUID(UChar_t uuid[16]) const;
78 void SetUUID(const char *uuid_str);
79 UInt_t GetUUIDNumber() const { return fUUIDIndex; }
82 void StreamerV1(TBuffer &b);
83 void FillBuffer(char *&buffer);
84 void ReadBuffer(char *&buffer);
85 Int_t Sizeof() const { return 18; }
87 ClassDef(TUUID,1) // Universally Unique IDentifier
91inline TBuffer &operator>>(TBuffer &buf, TUUID &uuid)
92{ uuid.Streamer(buf); return buf; }
94// Not inlined in order to avoid const casted away warning in user code.
95TBuffer &operator<<(TBuffer &buf, const TUUID &uuid);
97inline Bool_t operator==(const TUUID &u1, const TUUID &u2)
98{ return (!u1.Compare(u2)) ? kTRUE : kFALSE; }
100inline Bool_t operator!=(const TUUID &u1, const TUUID &u2)
101{ return !(u1 == u2); }
#define b(i)
Definition RSha256.hxx:100
bool Bool_t
Definition RtypesCore.h:63
unsigned short UShort_t
Definition RtypesCore.h:40
unsigned char UChar_t
Definition RtypesCore.h:38
constexpr Bool_t kFALSE
Definition RtypesCore.h:101
constexpr Bool_t kTRUE
Definition RtypesCore.h:100
#define ClassDef(name, id)
Definition Rtypes.h:337
TBuffer & operator<<(TBuffer &buf, const Tmpl *obj)
Definition TBuffer.h:399
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t index
TBuffer & operator>>(TBuffer &buf, TUUID &uuid)
Definition TUUID.h:91
Bool_t operator==(const TUUID &u1, const TUUID &u2)
Definition TUUID.h:97
Bool_t operator!=(const TUUID &u1, const TUUID &u2)
Definition TUUID.h:100
Buffer base class used for serializing objects.
Definition TBuffer.h:43
This class stores the date and time with a precision of one second in an unsigned 32 bit word (950130...
Definition TDatime.h:37
Describe directory structure in memory.
Definition TDirectory.h:45
A ROOT file is a suite of consecutive data records (TKey instances) with a well defined format.
Definition TFile.h:51
This class represents an Internet Protocol (IP) address.
This class defines a UUID (Universally Unique IDentifier), also known as GUIDs (Globally Unique IDent...
Definition TUUID.h:42
UChar_t fClockSeqLow
Definition TUUID.h:50
void SetUUIDNumber(UInt_t index)
Definition TUUID.h:80
UChar_t fClockSeqHiAndReserved
Definition TUUID.h:49
UInt_t GetUUIDNumber() const
Definition TUUID.h:79
UChar_t fNode[6]
Definition TUUID.h:51
virtual void Streamer(TBuffer &)
void GetCurrentTime(uuid_time_t *timestamp)
Get current time as 60 bit 100ns ticks since whenever.
Definition TUUID.cxx:341
Int_t CmpTime(uuid_time_t *t1, uuid_time_t *t2)
Compare two time values.
Definition TUUID.cxx:206
void GetSystemTime(uuid_time_t *timestamp)
Get system time with 100ns precision. Time is since Oct 15, 1582.
Definition TUUID.cxx:393
virtual ~TUUID()
delete this TUUID
Definition TUUID.cxx:198
void ReadBuffer(char *&buffer)
Stream UUID from input buffer.
Definition TUUID.cxx:291
void SetFromString(const char *uuid_str)
Set this UUID to the value specified in uuid ((which must be in TUUID::AsString() format).
Definition TUUID.cxx:219
void Format(UShort_t clockseq, uuid_time_t ts)
Make a UUID from timestamp, clockseq and node id.
Definition TUUID.cxx:324
TDatime GetTime() const
Get time from UUID.
Definition TUUID.cxx:670
UInt_t fTimeLow
index in the list of UUIDs in TProcessUUID
Definition TUUID.h:46
const char * AsString() const
Return UUID as string. Copy string immediately since it will be reused.
Definition TUUID.cxx:571
Int_t Sizeof() const
Definition TUUID.h:85
void GetUUID(UChar_t uuid[16]) const
Return uuid in specified buffer (16 byte = 128 bits).
Definition TUUID.cxx:695
TInetAddress GetHostAddress() const
Get address of host encoded in UUID.
Definition TUUID.cxx:657
void SetUUID(const char *uuid_str)
Set this UUID to the value specified in uuid ((which must be in TUUID::AsString() format).
Definition TUUID.cxx:704
UShort_t Hash() const
Compute 16-bit hash value of the UUID.
Definition TUUID.cxx:586
UShort_t fTimeHiAndVersion
Definition TUUID.h:48
Create a UUID.
Definition TUUID.cxx:153
UShort_t fTimeMid
Definition TUUID.h:47
UInt_t fUUIDIndex
Definition TUUID.h:45
void GetRandomInfo(UChar_t seed[16])
Get random info based on some machine parameters.
Definition TUUID.cxx:511
void Print() const
Print UUID.
Definition TUUID.cxx:563
Int_t Compare(const TUUID &u) const
Compare two UUIDs "lexically" and return.
Definition TUUID.cxx:636
void FillBuffer(char *&buffer)
Stream UUID into output buffer.
Definition TUUID.cxx:275
void GetNodeIdentifier()
Get node identifier.
Definition TUUID.cxx:426
void StreamerV1(TBuffer &b)
Stream UUID from input buffer.
Definition TUUID.cxx:309
auto * t1
Definition textangle.C:20