scalarRange.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
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-------------------------------------------------------------------------------
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 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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    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, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::scalarRange
 
Description
    A scalar range specifier.
 
    The range selector can be specified as an "LOWER:UPPER" range, as a
    "LOWER:" bound, as an ":UPPER" bound or simply as an "EXACT" value.
    The read constructor uses a colon (:) as a range marker and a comma (,)
    to delimit the next possible range selector.
 
SourceFiles
    scalarRange.C
 
\*---------------------------------------------------------------------------*/
#ifndef scalarRange_H
#define scalarRange_H
 
#include "scalar.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward declaration of classes
class Istream;
class Ostream;
 
// Forward declaration of friend functions and operators
class scalarRange;
Istream& operator>>(Istream&, scalarRange&);
Ostream& operator<<(Ostream&, const scalarRange&);
 
 
/*---------------------------------------------------------------------------*\
                        Class scalarRange Declaration
\*---------------------------------------------------------------------------*/
 
class scalarRange
{
    //- Enumeration defining the types of token
    enum rangeType
    {
        EMPTY = 0,
        EXACT,
        LOWER,
        UPPER,
        RANGE
    };
 
 
    // Private data
 
        enum rangeType type_;
        scalar value_;
        scalar value2_;
 
 
public:
 
        static int debug;
 
 
    // Constructors
 
        //- Construct an empty range
        scalarRange();
 
        //- Construct a range from lower to upper
        scalarRange(const scalar lower, const scalar upper);
 
        //- Construct from Istream.
        //  Since commas can be used as list delimiters,
        //  leading and trailing commas are ignored.
        scalarRange(Istream&);
 
 
    // Member Functions
 
        //- Is the range empty?
        bool empty() const;
 
        //- Is the range non-empty?
        bool valid() const;
 
        //- Is the range 'EXACT'?
        bool isExact() const;
 
        //- The value constituting an 'EXACT' match
        //  or the values for 'UPPER' or 'LOWER' limits
        scalar value() const;
 
        //- The lower limit
        scalar lower() const;
 
        //- The upper limit
        scalar upper() const;
 
        //- Return true if the value is within the range
        bool selected(const scalar) const;
 
 
    // Member Operators
 
        bool operator==(const scalarRange&) const;
        bool operator!=(const scalarRange&) const;
 
 
    // IOstream Operators
 
        friend Istream& operator>>(Istream&, scalarRange&);
        friend Ostream& operator<<(Ostream&, const scalarRange&);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //