rawIOField.C

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    Copyright (C) 2016-2021 OpenCFD Ltd.
-------------------------------------------------------------------------------
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.
 
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    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 "rawIOField.H"
#include "IFstream.H"
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
template<class Type>
Foam::rawIOField<Type>::rawIOField(const IOobject& io, const bool readAverage)
:
    regIOobject(io),
    average_(Zero)
{
    // Check for MUST_READ_IF_MODIFIED
    warnNoRereading<rawIOField<Type>>();
 
    if
    (
        io.readOpt() == IOobject::MUST_READ
     || io.readOpt() == IOobject::MUST_READ_IF_MODIFIED
     || io.readOpt() == IOobject::READ_IF_PRESENT
    )
    {
        bool haveFile = false;
        bool headerOk = false;
 
        // Replacement of regIOobject::headerok() since that one complains
        // if there is no header. TBD - Move up to headerOk()/fileHandler.
        {
            const fileName fName(filePath());
 
            // Try to open raw first
            autoPtr<ISstream> isPtr(fileHandler().NewIFstream(fName));
 
            if (isPtr && isPtr->good())
            {
                haveFile = true;
 
                ISstream& is = isPtr();
 
                const token firstToken(is);
 
                headerOk = is.good() && firstToken.isWord("FoamFile");
            }
 
            isPtr.clear();
 
            if (debug)
            {
                Pout<< "rawIOField : object:" << io.name()
                    << " haveFile:" << haveFile
                    << " headerOk:" << headerOk << endl;
            }
        }
 
 
        if (headerOk)
        {
            // Read but don't fail upon wrong class. Could extend by providing
            // wanted typeName. Tbd.
            Istream& is = readStream(word::null);
 
            if (is.good())
            {
                is  >> static_cast<Field<Type>&>(*this);
                if (readAverage)
                {
                    average_ = pTraits<Type>(is);
                }
                close();
            }
        }
        else if (haveFile)
        {
            // Failed reading - fall back to IFstream
            autoPtr<ISstream> isPtr(fileHandler().NewIFstream(io.objectPath()));
 
            if (!isPtr || !isPtr->good())
            {
                if (io.readOpt() != IOobject::READ_IF_PRESENT)
                {
                    FatalIOErrorInFunction(*isPtr)
                        << "Trying to read raw field" << endl
                        << exit(FatalIOError);
                }
            }
            else
            {
                ISstream& is = isPtr();
 
                is  >> static_cast<Field<Type>&>(*this);
                if (readAverage)
                {
                    average_ = pTraits<Type>(is);
                }
            }
        }
 
        if (debug)
        {
            Pout<< "rawIOField : object:" << io.name()
                << " size:" << this->size() << endl;
        }
    }
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
template<class Type>
bool Foam::rawIOField<Type>::writeData(Ostream& os) const
{
    os  << static_cast<const Field<Type>&>(*this);
    if (average_ != pTraits<Type>::zero)
    {
        os << token::NL << average_;
    }
    return os.good();
}
 
 
// ************************************************************************* //