//
// ConStream.h: interface for the ConStream class.
//
//  Source code from:
//
//  Serial Communications: A C++ Developer's Guide, 2nd 
//  Edition by Mark Nelson, IDG Books, 1999
//
// The ConStream class creates a C++ ostream object that can 
// be  used in Win32 C++ programs to write to a console window, 
// often for debugging purposes. This utility code is included
// with as-is with no further documentation.
//

//
// This header file defines the entire interface to the ConStream class.
// ConStream is a class that works like a standard iostream, and writes 
// to a console window when created in a Win32 application. You can only
// have a single console window open at a time, so only a single ConStream
// class is ordinarily created in an application.
//

#if !defined( _CONSTREAM_H )
#define _CONSTREAM_H

//
// Note that ConStream uses the standard C++ libraries that ship with
// Visual C++ 5.0 and later, not the older libraries with the .h suffix.
// The library would require some modifications to work with the older
// libraries.
//
#include <windows.h>

#include <iostream>
#include <fstream>

using namespace std;

//
// The ConStream class is derived from what we normally think of as ostream,
// which means you can use standard insertion operators to write to it. Of
// course, this includes insertion operators for user defined classes. At
// all times, a ConStream object is either writing out to to a FILE 
// object attached to the NUL device, or a FILE object attached to a console
// created using the Win32 API. Which of the two is in use depends on whether
// or not the ConStream object has had its Open() or Close() method called.
//
class ConStream 
  : public basic_ostream<char>
{
public :
    ConStream();
    virtual ~ConStream();
    void Open();
    void Close();
    bool IsOpen(){ 
        return m_hConsole != INVALID_HANDLE_VALUE;
    }
protected :
    HANDLE m_hConsole;
    basic_filebuf<char> *m_FileBuf;    
    basic_filebuf<char> m_Nul;        
    FILE *m_fNul;                     
    FILE *m_fConsole;                 
};

#endif // !defined( _CONSTREAM_H )