DynamicList.C

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    Copyright (C) 2017-2022 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.

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    under the terms of the GNU General Public License as published by
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#include "DynamicList.H"
#include "labelRange.H"

// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //

template<class T, int SizeMin>
Foam::label Foam::DynamicList<T, SizeMin>::removeElements
(
    const labelRange& slice
)
{
    if (!slice.size())
    {
        // No-op
        return 0;
    }
    else if (slice.end_value() >= this->size())
    {
        // Remove entire tail
        this->resize(slice.begin_value());
    }
    else
    {
        // Copy (swap) down, from range rbegin() -> rend()
        // followed by truncation
        label j = slice.begin_value();
        const label len = this->size();

        for (label i = slice.end_value(); i < len; ++i, ++j)
        {
            Foam::Swap(this->operator[](i), this->operator[](j));
        }

        this->resize(this->size() - slice.size());
    }

    return slice.size();
}


template<class T, int SizeMin>
Foam::label Foam::DynamicList<T, SizeMin>::subsetElements
(
    const labelRange& slice
)
{
    if (slice.begin_value() > 0)
    {
        // Copy (swap) down
        label j = slice.begin_value();
        const label len = slice.size();

        for (label i = 0; i < len; ++i, ++j)
        {
            Foam::Swap(this->operator[](i), this->operator[](j));
        }
    }

    // Don't need min size, since slice size was already checked before
    resize(slice.size());
    return this->size();
}


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