topical media & game development

topical media & game development

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lib-of-vs-libs-Poco-include-Poco-NullStream.h / h


  //
  // NullStream.h
  //
  //  $Id: //poco/1.3/Foundation/include/Poco/NullStream.h#1$ 
  //
  // Library: Foundation
  // Package: Streams
  // Module:  NullStream
  //
  // Definition of the NullStreamBuf, NullInputStream and NullOutputStream classes.
  //
  // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
  // and Contributors.
  //
  // Permission is hereby granted, free of charge, to any person or organization
  // obtaining a copy of the software and accompanying documentation covered by
  // this license (the "Software") to use, reproduce, display, distribute,
  // execute, and transmit the Software, and to prepare derivative works of the
  // Software, and to permit third-parties to whom the Software is furnished to
  // do so, all subject to the following:
  // 
  // The copyright notices in the Software and this entire statement, including
  // the above license grant, this restriction and the following disclaimer,
  // must be included in all copies of the Software, in whole or in part, and
  // all derivative works of the Software, unless such copies or derivative
  // works are solely in the form of machine-executable object code generated by
  // a source language processor.
  // 
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  // DEALINGS IN THE SOFTWARE.
  //
  
  ifndef Foundation_NullStream_INCLUDED
  define Foundation_NullStream_INCLUDED
  
  include "Poco/Foundation.h"
  include "Poco/UnbufferedStreamBuf.h"
  include <istream>
  include <ostream>
  
  namespace Poco {
  
  class Foundation_API NullStreamBuf: public UnbufferedStreamBuf

This stream buffer discards all characters written to it. Any read operation immediately yields EOF. { public: NullStreamBuf(); Creates a NullStreamBuf. ~NullStreamBuf(); Destroys the NullStreamBuf. protected: int readFromDevice(); int writeToDevice(char c); };


  class Foundation_API NullIOS: public virtual std::ios

The base class for NullInputStream and NullOutputStream. This class is needed to ensure the correct initialization order of the stream buffer and base classes. { public: NullIOS(); ~NullIOS();


  protected:
          NullStreamBuf _buf;
  };
  
  class Foundation_API NullInputStream: public NullIOS, public std::istream

Any read operation from this stream immediately yields EOF. { public: NullInputStream(); Creates the NullInputStream.


          ~NullInputStream();

Destroys the NullInputStream. };


  class Foundation_API NullOutputStream: public NullIOS, public std::ostream

This stream discards all characters written to it. { public: NullOutputStream(); Creates the NullOutputStream. ~NullOutputStream(); Destroys the NullOutputStream. };


  } // namespace Poco
  
  endif // Foundation_NullStream_INCLUDED

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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