#ifndef STREAMBUF_
#define STREAMBUF_

namespace std {

	class streambuf
	{
	public:
		static const int eof = -1;
		
		virtual ~streambuf()
		{
		}
		
		virtual int sync()
		{
			return 0;
		}
		
		char* eback() const
		{
			return in_beg;
		}
		
		char* gptr() const
		{
			return in_cur;
		}
		
		char* egptr() const
		{
			return in_end;
		}
		
		void setg(char* beg, char* next, char* end)
		{
			this->in_beg = beg;
			this->in_cur = next;
			this->in_end = end;
		}
		
		char* pbase() const
		{
			return out_beg;
		}
		
		char* pptr() const
		{
			return out_cur;
		}
		
		char* epptr() const
		{
			return out_end;
		}
		
		void setp(char* beg, char* end)
		{
			this->out_beg = beg;
			this->out_cur = beg;
			this->out_end = end;
		}
		
		void pbump(int n)
		{
			out_cur += n;
		}
		
		virtual int overflow(int c = eof)
		{
			(void) c;
			return eof;
		}
		
		virtual int underflow()
		{
			return eof;
		}
		
	private:
		char* in_beg;
		char* in_cur;
		char* in_end;
		char* out_beg;
		char* out_cur;
		char* out_end;
	};
	
}

#endif /*STREAMBUF_*/