packing.hh

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
//
// SPDX-FileCopyrightText: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
// SPDX-License-Identifier: GPL-3.0-or-later
//
#ifndef DUMUX_PARALLEL_PACKING_HH
#define DUMUX_PARALLEL_PACKING_HH
 
#include <vector>
#include <cstring>
#include <type_traits>
 
namespace Dumux::Detail {

template<class T>
  requires std::is_trivially_copyable_v<T>
void packValue(std::vector<char>& buf, const T& value)
{
    const auto* p = reinterpret_cast<const char*>(&value);
    buf.insert(buf.end(), p, p + sizeof(T));
}

template<class T>
  requires std::is_trivially_copyable_v<T>
T unpackValue(const char*& cursor)
{
    T value;
    std::memcpy(&value, cursor, sizeof(T));
    cursor += sizeof(T);
    return value;
}
 
} // end namespace Dumux::Detail
 
#endif