applications/test/Hashing/Test-Hashing.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   4    \\    /   O peration     |
   5     \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
   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 Application
  25     testHashing
  26
  27 Description
  28
  29 \*---------------------------------------------------------------------------*/
  30
  31 #include "IOstreams.H"
  32 #include "IOobject.H"
  33 #include "IFstream.H"
  34
  35 #include "stringList.H"
  36 #include "labelList.H"
  37 #include "labelPair.H"
  38 #include "edgeList.H"
  39 #include "triFaceList.H"
  40
  41 #include "Hash.H"
  42
  43 using namespace Foam;
  44
  45 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  46 //  Main program:
  47
  48 int main(int argc, char *argv[])
  49 {
  50     IFstream is("hashingTests");
  51
  52
  53     while (is.good())
  54     {
  55         const word listType(is);
  56
  57         Info<< endl;
  58         IOobject::writeDivider(Info) << listType << endl;
  59
  60         if (listType == "stringList")
  61         {
  62             Info<< "contiguous = " << contiguous<string>() << endl << endl;
  63
  64             stringList lst(is);
  65
  66             forAll(lst, i)
  67             {
  68                 unsigned hash1 = string::hash()(lst[i]);
  69
  70                 Info<< hex << hash1 << ": " << lst[i] << endl;
  71             }
  72
  73         }
  74         else if (listType == "labelList")
  75         {
  76             Info<<"contiguous = " << contiguous<label>() << endl << endl;
  77
  78             labelList lst(is);
  79
  80             forAll(lst, i)
  81             {
  82                 // direct value
  83                 unsigned hash1 = Hash<label>()(lst[i]);
  84
  85                 // hashed byte-wise
  86                 unsigned hash2 = Hash<label>()(lst[i], 0);
  87
  88                 Info<< hex << hash1
  89                     << " (seeded: " << hash2 << ")"
  90                     << ": " << dec << lst[i] << endl;
  91             }
  92
  93             if (contiguous<label>())
  94             {
  95                 unsigned hash3 = Hasher
  96                 (
  97                     lst.cdata(),
  98                     lst.size() * sizeof(label)
  99                 );
 100
 101                 Info<<"contiguous hashed value " << hex << hash3 << endl;
 102             }
 103         }
 104         else if (listType == "labelListList")
 105         {
 106             List< List<label> > lst(is);
 107
 108             forAll(lst, i)
 109             {
 110                 unsigned hash1 = Hasher
 111                 (
 112                     lst[i].cdata(),
 113                     lst[i].size() * sizeof(label)
 114                 );
 115
 116                 Info<< hex << hash1
 117                     << ": " << dec << lst[i] << endl;
 118             }
 119
 120         }
 121         else if (listType == "edgeList")
 122         {
 123             Info<<"contiguous = " << contiguous<edge>() << endl << endl;
 124
 125             edgeList lst(is);
 126
 127             forAll(lst, i)
 128             {
 129                 unsigned hash1 = Hash<edge>()(lst[i]);
 130
 131                 // as FixedList
 132                 unsigned hash2 = labelPair::Hash<>()(lst[i]);
 133
 134                 Info<< hex << hash1 << " (as FixedList: " << hash2
 135                     << "): " << dec << lst[i] << endl;
 136             }
 137         }
 138         else if (listType == "triFaceList")
 139         {
 140             Info<<"contiguous = " << contiguous<triFace>() << endl << endl;
 141
 142             triFaceList lst(is);
 143
 144             forAll(lst, i)
 145             {
 146                 // direct value
 147                 unsigned hash1 = Hash<triFace>()(lst[i]);
 148                 unsigned hash2 = FixedList<label, 3>::Hash<>()(lst[i]);
 149
 150                 Info<< hex << hash1 << " (as FixedList: " << hash2
 151                     << "): " << dec << lst[i] << endl;
 152             }
 153         }
 154         else
 155         {
 156             Info<< "unknown type: " << listType << endl;
 157         }
 158
 159     }
 160
 161     return 0;
 162 }
 163
 164
 165 // ************************************************************************* //