typedef unsigned short Rune;		/* 16 bits */typedef unsigned char uchar;#define		Runeerror	0x80	/* decoding error in UTF */#define		Runeself	0x80	/* rune and UTF sequences are the same (<) */#define		UTFmax		6	/* maximum bytes per rune */ /*	plan 9 argument parsing*/#define	ARGBEGIN	for((argv0? 0: (argv0= *argv)),argv++,argc--;\			    argv[0] && argv[0][0]=='-' && argv[0][1];\			    argc--, argv++) {\				char *_args, *_argt, _argc;\				_args = &argv[0][1];\				if(_args[0]=='-' && _args[1]==0){\					argc--; argv++; break;\				}\				_argc=0;while(*_args) switch(_argc= *_args++)#define	ARGEND		}#define	ARGF()		(_argt=_args, _args="",\				(*_argt? _argt: argv[1]? (argc--, *++argv): 0))#define	ARGC()		_argcextern char *argv0;