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/*
interface/dataprovider.h - Interface for data sources
Copyright (C) 2003 Klarälvdalens Datakonsult AB
2016 Bundesamt für Sicherheit in der Informationstechnik
Software engineering by Intevation GmbH
This file is part of GPGME++.
GPGME++ is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
GPGME++ 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with GPGME++; see the file COPYING.LIB. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef __GPGMEPP_INTERFACES_DATAPROVIDER_H__
#define __GPGMEPP_INTERFACES_DATAPROVIDER_H__
#include <sys/types.h>
#include "../gpgmepp_export.h"
#include <gpg-error.h>
namespace GpgME
{
class GPGMEPP_EXPORT DataProvider
{
public:
virtual ~DataProvider() {}
enum Operation {
Read, Write, Seek, Release
};
virtual bool isSupported(Operation op) const = 0;
virtual ssize_t read(void *buffer, size_t bufSize) = 0;
virtual ssize_t write(const void *buffer, size_t bufSize) = 0;
virtual off_t seek(off_t offset, int whence) = 0;
virtual void release() = 0;
};
} // namespace GpgME
#endif // __GPGMEPP_INTERFACES_DATAPROVIDER_H__
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