FilePartCalculator.cpp

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//=======================================================================================
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//
//  This file is part of VirtualFluids. VirtualFluids 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.
//
//  VirtualFluids 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.
//
//  SPDX-License-Identifier: GPL-3.0-or-later
//  SPDX-FileCopyrightText: Copyright © VirtualFluids Project contributors, see AUTHORS.md in root folder
//
//=======================================================================================
#include "FilePartCalculator.h"
#include <stdexcept>
 
namespace vf::gpu {
 
uint FilePartCalculator::calculateNumberOfNodesInPart(uint numberOfNodes, uint indexOfFilePart)
{
    uint indexOfLastFilePart = FilePartCalculator::calculateNumberOfParts(numberOfNodes) - 1;
 
    if (indexOfFilePart > indexOfLastFilePart)
        throw std::runtime_error("The number of nodes for a non-existing part can not be calculated");
    if (indexOfFilePart == indexOfLastFilePart)
        return numberOfNodes - (indexOfFilePart * FilePartCalculator::limitOfNodesForVTK);
    return FilePartCalculator::limitOfNodesForVTK;
}
 
uint FilePartCalculator::calculateNumberOfParts(uint numberOfNodes)
{
    return numberOfNodes / FilePartCalculator::limitOfNodesForVTK + 1;
}
 
uint FilePartCalculator::calculateStartingPostionOfPart(uint indexOfPart)
{
    return indexOfPart * FilePartCalculator::limitOfNodesForVTK;
}
 
const uint FilePartCalculator::limitOfNodesForVTK;
 
}