#ifndef _ISTREAM_HPP_
#define _ISTREAM_HPP_
#include <io.h>
#include <fcntl.h>
#include <share.h>
#include <sys/stat.h>
#include <mdiwin/windows.hpp>
#include <mdiwin/types.hpp>

class IStream
{
public:
#if defined(__FLAT__)
	typedef void * VPTR;
#else
	typedef void far * VPTR;
#endif
	IStream(const char *pathFileName);
	virtual ~IStream();
	WORD isOpen(void)const;
	WORD getChar(void);
	WORD getWord(void);
	UCHAR currentChar(void)const;
	USHORT currentWord(void)const;
	void closeFile(void);
private:
	enum{MaxInputBuffer=6400};
	HGLOBAL mhGlobalBuffer;
	UCHAR FAR *mlpBuffer;
	UCHAR FAR *mlpBufferPointer;
	USHORT mBufferIndex;

	short mFileDescriptor;
	USHORT mCurrentWord;
	UCHAR mCurrentChar;
};

inline
UCHAR IStream::currentChar(void)const
{
  return mCurrentChar;
}

inline
USHORT IStream::currentWord(void)const
{
	return mCurrentWord;
}

inline
void IStream::closeFile(void)
{
	if(-1!=mFileDescriptor)::close(mFileDescriptor);
	mFileDescriptor=-1;
}

inline
WORD IStream::isOpen(void)const
{
	if(-1==mFileDescriptor)return FALSE;
	return TRUE;
}
#endif