icinga2/lib/base/stream.h

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/******************************************************************************
* Icinga 2 *
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* Copyright (C) 2012-present Icinga Development Team (http://www.icinga.org) *
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* *
* 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 St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
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#ifndef STREAM_H
#define STREAM_H
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#include "base/i2-base.h"
#include "base/object.h"
#include "base/qstring.h"
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#include <boost/exception_ptr.hpp>
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#include <boost/signals2.hpp>
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namespace icinga
{
struct ReadLineContext
{
ReadLineContext(void) : Buffer(NULL), Size(0), Eof(false), MustRead(true)
{ }
char *Buffer;
size_t Size;
bool Eof;
bool MustRead;
};
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/**
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* A stream.
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*
* @ingroup base
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*/
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class I2_BASE_API Stream : public Object
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{
public:
DECLARE_PTR_TYPEDEFS(Stream);
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/**
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* Reads data from the stream.
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*
* @param buffer The buffer where data should be stored. May be NULL if you're
* not actually interested in the data.
* @param count The number of bytes to read from the queue.
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* @returns The number of bytes actually read.
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*/
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virtual size_t Read(void *buffer, size_t count) = 0;
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/**
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* Writes data to the stream.
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*
* @param buffer The data that is to be written.
* @param count The number of bytes to write.
* @returns The number of bytes written
*/
virtual void Write(const void *buffer, size_t count) = 0;
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/**
* Closes the stream and releases resources.
*/
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virtual void Close(void) = 0;
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/**
* Checks whether we've reached the end-of-file condition.
*
* @returns true if EOF.
*/
virtual bool IsEof(void) const = 0;
bool ReadLine(String *line, ReadLineContext& context);
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};
}
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#endif /* STREAM_H */