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/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 1991-2009 OpenCFD Ltd.
\\/ M anipulation |
-------------------------------------------------------------------------------
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 2 of the License, or (at your
option) any later version.
OpenFOAM 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 OpenFOAM; if not, write to the Free Software Foundation,
Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Class
Foam::OSHA1stream
Description
An output stream for calculating SHA1 digests.
SourceFiles
OSHA1stream.C
\*---------------------------------------------------------------------------*/
#ifndef OSHA1stream_H
#define OSHA1stream_H
#include "OSstream.H"
#include "SHA1.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
class osha1stream;
class OSHA1stream;
/*---------------------------------------------------------------------------*\
Class sha1streambuf Declaration
\*---------------------------------------------------------------------------*/
//- A streambuf class for calculating SHA1 digests
class sha1streambuf
:
public std::streambuf
{
// Private data
//- This does all the work and has its own buffering
SHA1 sha1_;
friend class osha1stream;
public:
// Constructors
//- Construct null
sha1streambuf()
{}
// Member Functions
// Write
//- Process unbuffered
virtual std::streamsize xsputn(const char* str, std::streamsize n)
{
sha1_.append(str, n);
return n;
}
};
/*---------------------------------------------------------------------------*\
Class osha1stream Declaration
\*---------------------------------------------------------------------------*/
//- A basic output stream for calculating SHA1 digests
class osha1stream
:
virtual public std::ios,
public std::ostream
{
// Private data
sha1streambuf sbuf_;
public:
// Constructors
//- Construct null
osha1stream()
:
std::ostream(&sbuf_)
{}
// Member Functions
// Access
//- This hides both signatures of std::basic_ios::rdbuf()
sha1streambuf* rdbuf()
{
return &sbuf_;
}
//- Full access to the sha1
SHA1& sha1()
{
return sbuf_.sha1_;
}
};
/*---------------------------------------------------------------------------*\
Class OSHA1stream Declaration
\*---------------------------------------------------------------------------*/
//- The output stream for calculating SHA1 digests
class OSHA1stream
:
public OSstream
{
// Private Member Functions
//- Disallow default bitwise copy construct
OSHA1stream(const OSHA1stream&);
//- Disallow default bitwise assignment
void operator=(const OSHA1stream&);
public:
// Constructors
//- Construct and set stream status
OSHA1stream
(
streamFormat format=ASCII,
versionNumber version=currentVersion
)
:
OSstream
(
*(new osha1stream),
"OSHA1stream.sinkFile_",
format,
version
)
{}
// Destructor
~OSHA1stream()
{
delete &dynamic_cast<osha1stream&>(stdStream());
}
// Member functions
// Access
//- Full access to the sha1
Foam::SHA1& sha1()
{
return dynamic_cast<osha1stream&>(stdStream()).sha1();
}
//- Return SHA1::Digest for the data processed until now
Foam::SHA1Digest digest()
{
return sha1().digest();
}
// Edit
//- Clear the SHA1 calculation
void rewind()
{
sha1().clear();
}
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //