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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2024 OpenFOAM Foundation
\\/ 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 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 "ListOps.H"
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
const Foam::labelList Foam::emptyLabelList = Foam::labelList(0);
// * * * * * * * * * * * * * * * Global Functions * * * * * * * * * * * * * //
Foam::labelList Foam::invert
(
const label len,
const labelUList& map
)
{
labelList inverse(len, -1);
forAll(map, i)
{
label newPos = map[i];
if (newPos >= 0)
{
if (inverse[newPos] >= 0)
{
FatalErrorInFunction
<< "Map is not one-to-one. At index " << i
<< " element " << newPos << " has already occurred before"
<< nl << "Please use invertOneToMany instead"
<< abort(FatalError);
}
inverse[newPos] = i;
}
}
return inverse;
}
Foam::labelListList Foam::invertOneToMany
(
const label len,
const labelUList& map
)
{
labelList nElems(len, 0);
forAll(map, i)
{
if (map[i] >= 0)
{
nElems[map[i]]++;
}
}
labelListList inverse(len);
forAll(nElems, i)
{
inverse[i].setSize(nElems[i]);
nElems[i] = 0;
}
forAll(map, i)
{
label newI = map[i];
if (newI >= 0)
{
inverse[newI][nElems[newI]++] = i;
}
}
return inverse;
}
Foam::labelList Foam::identityMap(const label len)
{
labelList map(len);
forAll(map, i)
{
map[i] = i;
}
return map;
}
Foam::labelList Foam::identityMap(const label start, const label len)
{
labelList map(len);
forAll(map, i)
{
map[i] = start + i;
}
return map;
}
// ************************************************************************* //
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