load.tcc (flens/io/array/load.tcc)

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/*
*   Copyright (c) 2012, Klaus Pototzky
*
*   All rights reserved.
*
*   Redistribution and use in source and binary forms, with or without
*   modification, are permitted provided that the following conditions
*   are met:
*
*   1) Redistributions of source code must retain the above copyright
*      notice, this list of conditions and the following disclaimer.
*   2) Redistributions in binary form must reproduce the above copyright
*      notice, this list of conditions and the following disclaimer in
*      the documentation and/or other materials provided with the
*      distribution.
*   3) Neither the name of the FLENS development group nor the names of
*      its contributors may be used to endorse or promote products derived
*      from this software without specific prior written permission.
*
*   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
*   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
*   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
*   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
*   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
*   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
*   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
*   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
*   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
*   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
*   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef FLENS_IO_ARRAY_LOAD_TCC
#define FLENS_IO_ARRAY_LOAD_TCC 1

#include <fstream>
#include <flens/io/array/load.h>

namespace flens {

template <typename A>
bool
load(std::string filename, DenseVector<A> &x)
{

    typedef typename A::IndexType   IndexType;
    typedef typename A::ElementType ElementType;

    std::ifstream ifs(filename.c_str(), std::ios::binary);

    if (ifs.is_open()==false) {
        return false;
    }

    IndexType length;
    IndexType firstIndex;

    ifs.read(reinterpret_cast<char*>(&length), sizeof(IndexType));
    ifs.read(reinterpret_cast<char*>(&firstIndex), sizeof(IndexType));

    x.resize(length, firstIndex);

    for (IndexType i=x.firstIndex(); i<=x.lastIndex(); ++i) {
        ifs.read(reinterpret_cast<char*>(&(x(i))), sizeof(ElementType));
    }

    ifs.close();
    return true;
}

//-- forwarding ---------------------------------------------------------------

template <typename V>
typename RestrictTo<IsVector<V>::value,
                    bool>::Type
load(std::string filename, V &&x)
{
    return load(filename, x);
}

} // namespace flens

#endif // FLENS_IO_ARRAY_LOAD_TCC