randomstream.h

This software aims to create an applet and panel tools to manage a wireless interface card, such as

//
// RandomStream.h
//
// $Id: //poco/Main/Foundation/include/Foundation/RandomStream.h#5 $
//
// Definition of class RandomInputStream.
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#ifndef Foundation_RandomStream_INCLUDED
#define Foundation_RandomStream_INCLUDED


#ifndef Foundation_Foundation_INCLUDED
#include "Foundation/Foundation.h"
#endif
#ifndef Foundation_BufferedStreamBuf_INCLUDED
#include "Foundation/BufferedStreamBuf.h"
#endif
#ifndef STD_ISTREAM_INCLUDED
#include <istream>
#define STD_ISTREAM_INCLUDED
#endif


Foundation_BEGIN


class Foundation_API RandomBuf: public BufferedStreamBuf
	/// This streambuf generates random data.
	/// On Windows NT, the cryptographic API is used.
	/// On Unix, /dev/random is used, if available.
	/// Otherwise, a random number generator, some
	/// more-or-less random data and a SHA-1 digest
	/// is used to generate random data.
{
public:
	RandomBuf();
	~RandomBuf();
	int readFromDevice(char* buffer, std::streamsize length);
};


class Foundation_API RandomIOS: public virtual std::ios
	/// The base class for RandomInputStream.
	///
	/// This class is needed to ensure the correct initialization
	/// order of the stream buffer and base classes.
{
public:
	RandomIOS();
	~RandomIOS();
	RandomBuf* rdbuf();

protected:
	RandomBuf _buf;
};


class Foundation_API RandomInputStream: public RandomIOS, public std::istream
	/// This istream generates random data
	/// using the RandomBuf.
{
public:
	RandomInputStream();
	~RandomInputStream();
};


Foundation_END


#endif // Foundation_RandomStream_INCLUDED