FreeFOAM The Cross-Platform CFD Toolkit
label.C
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2  ========= |
3  \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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5  \\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
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25 
26 #include <OpenFOAM/error.H>
27 #include "label.H"
28 
29 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
30 
31 namespace Foam
32 {
33 
34 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
35 
36 const char* const pTraits<label>::typeName = "label";
37 const label pTraits<label>::zero = 0;
38 const label pTraits<label>::one = 1;
39 const label pTraits<label>::min = labelMin;
40 const label pTraits<label>::max = labelMax;
41 
42 const char* pTraits<label>::componentNames[] = { "x" };
43 
45 {
46  is >> p_;
47 }
48 
49 
50 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
51 
52 // Raise one label to the power of another (overloaded function call)
53 label pow(label a, label b)
54 {
55  register label ans = 1;
56  for (register label i=0; i<b; i++)
57  {
58  ans *= a;
59  }
60 
61 # ifdef FULLDEBUG
62  if (b < 0)
63  {
64  FatalErrorIn("pow(label a, label b)")
65  << "negative value for b is not supported"
66  << abort(FatalError);
67  }
68 # endif
69 
70  return ans;
71 }
72 
73 
74 //- Return factorial(n) : 0 <= n <= 12
75 label factorial(label n)
76 {
77  static label factTable[13] =
78  {
79  1, 1, 2, 6, 24, 120, 720, 5040, 40320,
80  362880, 3628800, 39916800, 479001600
81  };
82 
83 # ifdef FULLDEBUG
84  if (n > 12 && n < 0)
85  {
86  FatalErrorIn("factorial(label n)")
87  << "n value out of range"
88  << abort(FatalError);
89  }
90 # endif
91 
92  return factTable[n];
93 }
94 
95 
96 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
97 
98 } // End namespace Foam
99 
100 // ************************ vim: set sw=4 sts=4 et: ************************ //