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TotemNumberMerger.cc
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1 // -*- C++ -*-
2 //
3 // Package: Forward
4 // Class : TotemNumberMerger
5 //
6 // Implementation:
7 // <Notes on implementation>
8 //
9 // Original Author: R. Capra
10 // Created: Tue May 16 10:14:34 CEST 2006
11 //
12 
13 // system include files
14 
15 // user include files
18 
19 //
20 // constructors and destructor
21 //
23 #ifdef SCRIVI
24  LogDebug("ForwardSim") << "Creating TotemNumberMerger";
25 #endif
26 }
27 
29 #ifdef SCRIVI
30  LogDebug("ForwardSim") << "Destruction of TotemNumberMerger";
31 #endif
32 }
33 
34 //
35 // member functions
36 //
37 
38 unsigned long TotemNumberMerger ::Merge(unsigned long value1, unsigned long value2) const {
39  unsigned long c(value1 + value2);
40  unsigned long result(((c * (c + 1)) >> 1) + value1);
41 
42 #ifdef SCRIVI
43  LogDebug("ForwardSim") << "Merge(value1=" << value1 << ", value2=" << value2 << ")=" << result;
44 
45  unsigned long invValue1, invValue2;
46  Split(result, invValue1, invValue2);
47 
48  assert(invValue1 == value1);
49  assert(invValue2 == value2);
50 #endif
51 
52  return result;
53 }
54 
55 unsigned long TotemNumberMerger ::Merge(unsigned long value1, unsigned long value2, unsigned long value3) const {
56  return Merge(Merge(value1, value2), value3);
57 }
58 
59 unsigned long TotemNumberMerger ::Merge(unsigned long value1,
60  unsigned long value2,
61  unsigned long value3,
62  unsigned long value4) const {
63  return Merge(Merge(value1, value2), Merge(value3, value4));
64 }
65 
66 void TotemNumberMerger ::Split(unsigned long source, unsigned long &value1, unsigned long &value2) const {
67  unsigned long c(static_cast<unsigned long>(floor(sqrt(1. + 8. * static_cast<float>(source)) * 0.5 - 0.5)));
68 
69  value1 = source - ((c * (c + 1)) >> 1);
70  value2 = c - value1;
71 
72 #ifdef SCRIVI
73  LogDebug("ForwardSim") << "source=" << source << ", c=" << c << ", value1=" << value1 << ", value2=" << value2;
74 #endif
75 }
76 
77 void TotemNumberMerger ::Split(unsigned long source,
78  unsigned long &value1,
79  unsigned long &value2,
80  unsigned long &value3) const {
81  unsigned long mix12;
82 
83  Split(source, mix12, value3);
84  Split(mix12, value1, value2);
85 }
86 
87 void TotemNumberMerger ::Split(unsigned long source,
88  unsigned long &value1,
89  unsigned long &value2,
90  unsigned long &value3,
91  unsigned long &value4) const {
92  unsigned long mix12, mix34;
93 
94  Split(source, mix12, mix34);
95  Split(mix12, value1, value2);
96  Split(mix34, value3, value4);
97 }
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TotemNumberMerger.h
TotemNumberMerger::~TotemNumberMerger
~TotemNumberMerger()
Definition: TotemNumberMerger.cc:28
TotemNumberMerger::TotemNumberMerger
TotemNumberMerger()
Definition: TotemNumberMerger.cc:22
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TotemNumberMerger::Split
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Definition: TotemNumberMerger.cc:66
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Definition: TotemNumberMerger.cc:38
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