/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     | Version:     4.1
    \\  /    A nd           | Web:         http://www.foam-extend.org
     \\/     M anipulation  | For copyright notice see file Copyright
-------------------------------------------------------------------------------
License
    This file is part of foam-extend.

    foam-extend 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.

    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.

\*---------------------------------------------------------------------------*/

#include "writeFuns.H"
#include "vtkTopo.H"

#if defined(__mips) && !defined(__SICORTEX__)
#include <standards.h>
#include <sys/endian.h>
#endif

// MacOSX
#ifdef __DARWIN_BYTE_ORDER
#if __DARWIN_BYTE_ORDER==__DARWIN_BIG_ENDIAN
#undef LITTLE_ENDIAN
#else
#undef BIG_ENDIAN
#endif
#endif

#if defined(LITTLE_ENDIAN) \
 || defined(_LITTLE_ENDIAN) \
 || defined(__LITTLE_ENDIAN)
#   define LITTLEENDIAN 1
#elif defined(BIG_ENDIAN) || defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN)
#   undef LITTLEENDIAN
#else
#   error "Cannot find LITTLE_ENDIAN or BIG_ENDIAN symbol defined."
#   error "Please add to compilation options"
#endif

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

void Foam::writeFuns::swapWord(int32_t& word32)
{
    char* mem = reinterpret_cast<char*>(&word32);

    char a = mem[0];
    mem[0] = mem[3];
    mem[3] = a;

    a = mem[1];
    mem[1] = mem[2];
    mem[2] = a;
}


void Foam::writeFuns::swapWords(const label nWords, int32_t* words32)
{
    for (label i = 0; i < nWords; i++)
    {
        swapWord(words32[i]);
    }
}


void Foam::writeFuns::write
(
    std::ostream& os,
    const bool binary,
    List<floatScalar>& fField
)
{
    if (binary)
    {
        #ifdef LITTLEENDIAN
        swapWords(fField.size(), reinterpret_cast<int32_t*>(fField.begin()));
        #endif

        os.write
        (
            reinterpret_cast<char*>(fField.begin()),
            fField.size()*sizeof(float)
        );

        os << std::endl;
    }
    else
    {
        forAll(fField, i)
        {
            os << fField[i] << ' ';

            if (i > 0 && (i % 10) == 0)
            {
                os << std::endl;
            }
        }
        os << std::endl;
    }
}


void Foam::writeFuns::write
(
    std::ostream& os,
    const bool binary,
    DynamicList<floatScalar>& fField
)
{
    List<floatScalar>& fld = fField.shrink();

    write(os, binary, fld);
}


void Foam::writeFuns::write
(
    std::ostream& os,
    const bool binary,
    labelList& elems
)
{
    if (binary)
    {
        #ifdef LITTLEENDIAN
        swapWords
        (
            (sizeof(label)/4)*elems.size(),
            reinterpret_cast<int32_t*>(elems.begin())
        );
        #endif
        os.write
        (
            reinterpret_cast<char*>(elems.begin()),
            elems.size()*sizeof(label)
        );

        os << std::endl;
    }
    else
    {
        forAll(elems, i)
        {
            os << elems[i] << ' ';

            if (i > 0 && (i % 10) == 0)
            {
                os << std::endl;
            }
        }
        os << std::endl;
    }
}


void Foam::writeFuns::write
(
    std::ostream& os,
    const bool binary,
    dynamicLabelList& elems
)
{
    labelList& fld = elems.shrink();

    write(os, binary, fld);
}


void Foam::writeFuns::writeHeader
(
    std::ostream& os,
    const bool binary,
    const string& name
)
{
    os  << "# vtk DataFile Version 2.0" << std::endl
        << name << std::endl;

    if (binary)
    {
        os << "BINARY" << std::endl;
    }
    else
    {
        os << "ASCII" << std::endl;
    }
}


void Foam::writeFuns::writeCellDataHeader
(
    std::ostream& os,
    const label nCells,
    const label nFields
)
{
    os  << "CELL_DATA " << nCells << std::endl
        << "FIELD attributes " << nFields << std::endl;
}


void Foam::writeFuns::writePointDataHeader
(
    std::ostream& os,
    const label nPoints,
    const label nFields
)
{
    os  << "POINT_DATA  " << nPoints << std::endl
        << "FIELD attributes " << nFields << std::endl;
}


void Foam::writeFuns::insert(const scalar& pt, DynamicList<floatScalar>& dest)
{
    dest.append(float(pt));
}


void Foam::writeFuns::insert(const vector& pt, DynamicList<floatScalar>& dest)
{
    for (direction cmpt = 0; cmpt < vector::nComponents; cmpt++)
    {
        dest.append(float(pt[cmpt]));
    }
}


void Foam::writeFuns::insert
(
    const sphericalTensor& pt,
    DynamicList<floatScalar>& dest
)
{
    for (direction cmpt = 0; cmpt < sphericalTensor::nComponents; cmpt++)
    {
        dest.append(float(pt[cmpt]));
    }
}


void Foam::writeFuns::insert
(
    const symmTensor& pt,
    DynamicList<floatScalar>& dest
)
{
    for (direction cmpt = 0; cmpt < symmTensor::nComponents; cmpt++)
    {
        dest.append(float(pt[cmpt]));
    }
}


void Foam::writeFuns::insert(const tensor& pt, DynamicList<floatScalar>& dest)
{
    for (direction cmpt = 0; cmpt < tensor::nComponents; cmpt++)
    {
        dest.append(float(pt[cmpt]));
    }
}


void Foam::writeFuns::insert(const labelList& source, dynamicLabelList& dest)
{
    forAll(source, i)
    {
        dest.append(source[i]);
    }
}


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