JNullStreamBuffer.hh

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#ifndef __JLANG__JNULLSTREAMBUFFER__
#define __JLANG__JNULLSTREAMBUFFER__

#include <stdio.h>
#include <streambuf>


/**
 * \author mdejong
 */

namespace JLANG {}
namespace JPP { using namespace JLANG; }

namespace JLANG {


  /**
   * Null stream buffer.
   */
  class JNullStreamBuffer : 
    public virtual std::streambuf
  {   
  public:


    typedef std::streambuf::traits_type  traits;
    typedef traits::int_type             int_type;
    typedef std::streamsize              streamsize;


    /**
     * Default constructor.
     */
    JNullStreamBuffer() 
    {}


    /**
     * Get reference to unique instance of this class object.
     * 
     * \return                 reference to this class object
     */
    static const JNullStreamBuffer& getInstance()
    {
      static const JNullStreamBuffer null;

      return null;
    }

    
    /**
     * Check underflow.
     * This method reads nothing.
     *
     * \return                 0
     */
    virtual int_type underflow()
    {   
      return EOF;
    } 


    /**
     * Check overflow.
     * This method writes nothing.
     *
     * \param  c               character
     * \return                 c
     */
    virtual int_type overflow(int_type c)
    {
      return c;
    }
  };  
}

#endif