HashTableCore.C
Go to the documentation of this file.
1 /*---------------------------------------------------------------------------*\
2  ========= |
3  \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
4  \\ / O peration | Website: https://openfoam.org
5  \\ / A nd | Copyright (C) 2011-2018 OpenFOAM Foundation
6  \\/ M anipulation |
7 -------------------------------------------------------------------------------
8 License
9  This file is part of OpenFOAM.
10 
11  OpenFOAM is free software: you can redistribute it and/or modify it
12  under the terms of the GNU General Public License as published by
13  the Free Software Foundation, either version 3 of the License, or
14  (at your option) any later version.
15 
16  OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
17  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19  for more details.
20 
21  You should have received a copy of the GNU General Public License
22  along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
23 
24 \*---------------------------------------------------------------------------*/
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:88
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.