JNullStreamBuffer.hh

Go to the documentation of this file.

#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