labelBits.H 3.85 KB
Newer Older
1
2
3
4
/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
Mark Olesen's avatar
Mark Olesen committed
5
    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
    Free Software Foundation; either version 2 of the License, or (at your
    option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM; if not, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Class
    Foam::labelBits

Description
    A 29bits label and 3bits packed into single label

SourceFiles

\*---------------------------------------------------------------------------*/

#ifndef labelBits_H
#define labelBits_H

#include "label.H"
#include "direction.H"
#include "error.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{


/*---------------------------------------------------------------------------*\
                         Class labelBits Declaration
\*---------------------------------------------------------------------------*/

class labelBits
{
    // Private data

        label data_;

        inline static label pack(const label val, const direction bits)
        {
#           ifdef FULLDEBUG
            if (bits > 7 || (((val<<3)>>3) != val))
            {
                FatalErrorIn
                (
                    "labelBits::pack(const label, const direction)"
                )   << "Direction " << bits << " outside range 0..7"
                    << abort(FatalError);
            }
#           endif

            return (val<<3) | bits;
        }

public:

    // Constructors

        //- Construct null
        inline labelBits()
        {}

        //- Construct from components
        inline labelBits(const label val, const direction bits)
        :
             data_(pack(val, bits))
        {}

        //- Construct from Istream
        inline labelBits(Istream& is)
        {
            is >> data_;
        }



    // Member Functions

        inline label val() const
        {
            return data_ >> 3;
        }

        inline direction bits() const
        {
            return data_ & 7;
        }

        inline void setVal(const label val)
        {
            data_ = pack(val, bits());
        }

        inline void setBits(const direction bits)
        {
            data_ = pack(val(), bits);
        }


    // Member Operators

        friend inline bool operator==(const labelBits& a, const labelBits& b)
        {
            return a.data_ == b.data_;
        }

        friend inline bool operator!=(const labelBits& a, const labelBits& b)
        {
            return !(a == b);
        }

    // IOstream Operators

        friend inline Istream& operator>>(Istream& is, labelBits& lb)
        {
            return is >> lb.data_;
        }
        
        friend inline Ostream& operator<<(Ostream& os, const labelBits& lb)
        {
            return os << lb.data_;
        }
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //