#ifndef _MACRO_H_
#define _MACRO_H_
#define INIT() (program_name\
					strrchr(argv[0],'/'))?\
					program_name++:\
					(program_name=argv[0])
#define EXIT(s) exit(s)
#define CLOSE(s) if(close(s)) error(1,errno,\
			"close failed")
#define set_errno(e) errno=(e)
#define isvalidsock(s) ((s)>=0)
typedef int SOCKET;
#endif