AliRoot Core  edcc906 (edcc906)
AliMpEncodePair.cxx
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15 
16 // $Id$
17 
18 // AliMp::Pair functions:
19 // The functions for encoding the pair of integers to another integer,
20 // defined withing a namespace AliMp.
21 // The encoded pairs can be added and subtracted.
22 // Author Laurent Aphecetche
23 
24 #include "AliMpEncodePair.h"
25 
26 #include <Riostream.h>
27 
28 //_______________________________________________________________________
29 MpPair_t AliMp::Pair(Int_t first, Int_t second)
30 {
33 
34  return (( first << 16 ) | second);
35 }
36 
37 //_______________________________________________________________________
39 {
42 
43  return ( pair & 0xFFFF0000 ) >> 16;
44 }
45 
46 //_______________________________________________________________________
48 {
51 
52  return pair & 0xFFFF;
53 }
54 
55 //_______________________________________________________________________
56 ostream& AliMp::PairPut(ostream& stream, MpPair_t pair)
57 {
59 
60  if ( pair >= 0 ) {
61  stream << '(' << AliMp::PairFirst(pair)
62  << ',' << AliMp::PairSecond(pair) << ')';
63  return stream;
64  }
65  else {
66  stream << "AliMpIntPair::Invalid";
67  return stream;
68  }
69 }
MpPair_t Pair(Int_t first, Int_t second)
Encode the pair of integers to another integer.
Int_t MpPair_t
Int_t PairFirst(MpPair_t pair)
Decode the first integer from encoded pair.
Int_t PairSecond(MpPair_t pair)
Decode the second integer from encoded pair.
ostream & PairPut(ostream &s, MpPair_t pair)
A special printing for encoded pair.