54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
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/*
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interface/dataprovider.h - Interface for data sources
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Copyright (C) 2003 Klarälvdalens Datakonsult AB
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This file is part of GPGME++.
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GPGME++ is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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GPGME++ is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with GPGME++; see the file COPYING.LIB. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef __GPGMEPP_INTERFACES_DATAPROVIDER_H__
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#define __GPGMEPP_INTERFACES_DATAPROVIDER_H__
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#include <sys/types.h>
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#include "gpgmepp_export.h"
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#include <gpg-error.h>
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namespace GpgME
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{
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class GPGMEPP_EXPORT DataProvider
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{
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public:
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virtual ~DataProvider() {}
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enum Operation {
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Read, Write, Seek, Release
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};
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virtual bool isSupported(Operation op) const = 0;
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virtual ssize_t read(void *buffer, size_t bufSize) = 0;
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virtual ssize_t write(const void *buffer, size_t bufSize) = 0;
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virtual off_t seek(off_t offset, int whence) = 0;
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virtual void release() = 0;
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};
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} // namespace GpgME
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#endif // __GPGMEPP_INTERFACES_DATAPROVIDER_H__
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