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/* This file is part of the OpenLB library
*
* Copyright (C) 2007 Jonas Latt
* E-mail contact: info@openlb.net
* The most recent release of OpenLB can be downloaded at
* <http://www.openlb.net/>
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef PARALLEL_IO_H
#define PARALLEL_IO_H
#include <streambuf>
#include <istream>
#include <ostream>
#include <fstream>
#include <iostream>
namespace olb {
class ParBuf : public std::streambuf {
public:
typedef enum {normal, serial} Modes;
// There are two modes for proceeding of parallel i/o:
// - normal: the default mode. all nodes write data, and all
// nodes receive data; this mode requests broadcasting.
// - serial: only node 0 writes and receives data.
public:
ParBuf(std::streambuf* _originalBuf);
Modes getMode() const;
void setMode(Modes _mode);
protected:
int_type overflow (int_type c) override;
std::streamsize xsputn(const char* s, std::streamsize num) override;
int_type uflow() override;
int_type underflow() override;
std::streamsize xsgetn (char* s, std::streamsize num) override;
private:
std::streambuf* originalBuf;
Modes mode;
};
class olb_ofstream : public std::ostream {
public:
olb_ofstream();
explicit olb_ofstream(const char * filename,
openmode mode = out | trunc );
~olb_ofstream() override;
std::streambuf* rdbuf() const;
bool is_open();
void open(const char* filename, openmode mode = out | trunc);
void close();
private:
std::filebuf fbuf;
ParBuf mybuf;
};
class olb_ifstream : public std::istream {
public:
olb_ifstream();
explicit olb_ifstream(const char * filename,
openmode mode = in );
~olb_ifstream() override;
std::streambuf* rdbuf() const;
bool is_open();
void open(const char* filename, openmode mode = in);
void close();
private:
std::filebuf fbuf;
ParBuf mybuf;
};
class olb_fstream : public std::iostream {
public:
olb_fstream();
explicit olb_fstream(const char * filename,
openmode mode = in | out );
~olb_fstream() override;
std::streambuf* rdbuf() const;
bool is_open();
void open(const char* filename, openmode mode = in | out);
void close();
private:
std::filebuf fbuf;
ParBuf mybuf;
};
} // namespace olb
#endif
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