src/OpenFOAM/db/IOstreams/Fstreams/IFstream.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   4    \\    /   O peration     |
   5     \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
   6      \\/     M anipulation  |
   7 -------------------------------------------------------------------------------
   8 License
   9     This file is part of OpenFOAM.
  10
  11     OpenFOAM is free software; you can redistribute it and/or modify it
  12     under the terms of the GNU General Public License as published by the
  13     Free Software Foundation; either version 2 of the License, or (at your
  14     option) any later version.
  15
  16     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
  17     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19     for more details.
  20
  21     You should have received a copy of the GNU General Public License
  22     along with OpenFOAM; if not, write to the Free Software Foundation,
  23     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  24
  25 \*---------------------------------------------------------------------------*/
  26
  27 #include "IFstream.H"
  28 #include <OpenFOAM/OSspecific.H>
  29 #include <OpenFOAM/gzstream.h>
  30
  31 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
  32
  33 defineTypeNameAndDebug(Foam::IFstream, 0);
  34
  35
  36 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  37
  38 Foam::IFstreamAllocator::IFstreamAllocator(const fileName& pathname)
  39 :
  40     ifPtr_(NULL),
  41     compression_(IOstream::UNCOMPRESSED)
  42 {
  43     if (pathname.empty())
  44     {
  45         if (IFstream::debug)
  46         {
  47             Info<< "IFstreamAllocator::IFstreamAllocator(const fileName&) : "
  48                     "cannot open null file " << endl;
  49         }
  50     }
  51
  52     ifPtr_ = new ifstream(pathname.c_str());
  53
  54     // If the file is compressed, decompress it before reading.
  55     if (!ifPtr_->good() && isFile(pathname + ".gz", false))
  56     {
  57         if (IFstream::debug)
  58         {
  59             Info<< "IFstreamAllocator::IFstreamAllocator(const fileName&) : "
  60                     "decompressing " << pathname + ".gz" << endl;
  61         }
  62
  63         delete ifPtr_;
  64
  65         ifPtr_ = new igzstream((pathname + ".gz").c_str());
  66
  67         if (ifPtr_->good())
  68         {
  69             compression_ = IOstream::COMPRESSED;
  70         }
  71     }
  72 }
  73
  74
  75 Foam::IFstreamAllocator::~IFstreamAllocator()
  76 {
  77     delete ifPtr_;
  78 }
  79
  80
  81 std::istream& Foam::IFstreamAllocator::stdStream()
  82 {
  83     if (!ifPtr_)
  84     {
  85         FatalErrorIn("IFstreamAllocator::stdStream()")
  86             << "No stream allocated" << abort(FatalError);
  87     }
  88     return *ifPtr_;
  89 }
  90
  91
  92 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
  93
  94 Foam::IFstream::IFstream
  95 (
  96     const fileName& pathname,
  97     streamFormat format,
  98     versionNumber version
  99 )
 100 :
 101     IFstreamAllocator(pathname),
 102     ISstream
 103     (
 104         *ifPtr_,
 105         "IFstream.sourceFile_",
 106         format,
 107         version,
 108         IFstreamAllocator::compression_
 109     ),
 110     pathname_(pathname)
 111 {
 112     setClosed();
 113
 114     setState(ifPtr_->rdstate());
 115
 116     if (!good())
 117     {
 118         if (debug)
 119         {
 120             Info<< "IFstream::IFstream(const fileName&,"
 121                    "streamFormat=ASCII,"
 122                    "versionNumber=currentVersion) : "
 123                    "could not open file for input"
 124                 << endl << info() << endl;
 125         }
 126
 127         setBad();
 128     }
 129     else
 130     {
 131         setOpened();
 132     }
 133
 134     lineNumber_ = 1;
 135 }
 136
 137
 138 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 139
 140 Foam::IFstream::~IFstream()
 141 {}
 142
 143
 144 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 145
 146 void Foam::IFstream::print(Ostream& os) const
 147 {
 148     // Print File data
 149     os  << "IFstream: ";
 150     ISstream::print(os);
 151 }
 152
 153
 154 // * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * * //
 155
 156 Foam::IFstream& Foam::IFstream::operator()() const
 157 {
 158     if (!good())
 159     {
 160         // also checks .gz file
 161         if (isFile(pathname_, true))
 162         {
 163             check("IFstream::operator()");
 164             FatalIOError.exit();
 165         }
 166         else
 167         {
 168             FatalIOErrorIn("IFstream::operator()", *this)
 169                 << "file " << pathname_ << " does not exist"
 170                 << exit(FatalIOError);
 171         }
 172     }
 173
 174     return const_cast<IFstream&>(*this);
 175 }
 176
 177
 178 // ************************ vim: set sw=4 sts=4 et: ************************ //