HashTableCore.C
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1 /*---------------------------------------------------------------------------*\
2  ========= |
3  \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
4  \\ / O peration |
5  \\ / A nd | Copyright (C) 2011-2012 OpenFOAM Foundation
6  \\/ M anipulation |
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10 
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25 
26 #include "HashTable.H"
27 #include "uLabel.H"
28 
29 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
30 
31 namespace Foam
32 {
33 defineTypeNameAndDebug(HashTableCore, 0);
34 }
35 
37 (
39  (
41  )
42 );
43 
44 
45 // * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
46 
48 {
49  if (size < 1)
50  {
51  return 0;
52  }
53 
54  // enforce power of two
55  uLabel goodSize = size;
56 
57  if (goodSize & (goodSize - 1))
58  {
59  // brute-force is fast enough
60  goodSize = 1;
61  while (goodSize < unsigned(size))
62  {
63  goodSize <<= 1;
64  }
65  }
66 
67  return goodSize;
68 }
69 
70 
71 // ************************************************************************* //
intWM_LABEL_SIZE_t label
A label is an int32_t or int64_t as specified by the pre-processor macro WM_LABEL_SIZE.
Definition: label.H:59
static const label maxTableSize
Maximum allowable table size.
Definition: HashTable.H:86
static const label labelMax
Definition: label.H:62
defineTypeNameAndDebug(combustionModel, 0)
static label canonicalSize(const label)
Return a canonical (power-of-two) size.
Definition: HashTableCore.C:47
uintWM_LABEL_SIZE_t uLabel
A uLabel is an uint32_t or uint64_t as specified by the pre-processor macro WM_LABEL_SIZE.
Definition: uLabel.H:59
Namespace for OpenFOAM.