sliceRange.C

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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-------------------------------------------------------------------------------
    Copyright (C) 2019-2020 OpenCFD Ltd.
-------------------------------------------------------------------------------
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
    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, see <http://www.gnu.org/licenses/>.
 
\*---------------------------------------------------------------------------*/
 
#include "sliceRange.H"
#include "FixedList.H"
#include "List.H"
#include "token.H"
#include <algorithm>
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::sliceRange::sliceRange(const FixedList<label,3>& coeffs)
:
    start_(coeffs[0]),
    size_(std::max(label(0),coeffs[1])),   // No negative size
    stride_(std::max(label(0),coeffs[2]))  // No negative stride
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::List<Foam::label> Foam::sliceRange::labels() const
{
    List<label> result(size_);
 
    if (stride_)
    {
        std::copy(cbegin(), cend(), result.begin());
    }
    else
    {
        // stride = 0 (identical values!)
        std::fill(result.begin(), result.end(), start_);
    }
 
    return result;
}
 
 
// * * * * * * * * * * * * * * * IOstream Operators  * * * * * * * * * * * * //
 
Foam::Istream& Foam::operator>>(Istream& is, sliceRange& range)
{
    label beg, len, stride;
 
    is.readBegin("sliceRange");
    is >> beg >> len >> stride;
    is.readEnd("sliceRange");
 
    range = sliceRange(beg, len, stride);
 
    is.check(FUNCTION_NAME);
    return is;
}
 
 
Foam::Ostream& Foam::operator<<(Ostream& os, const sliceRange& range)
{
    os  << token::BEGIN_LIST
        << range.start() << token::SPACE
        << range.size() << token::SPACE
        << range.stride() << token::END_LIST;
 
    os.check(FUNCTION_NAME);
    return os;
}
 
 
// ************************************************************************* //