/* simple command line parser from Plan 9 -- you are not expected to understand this */
/* see http://plan9.bell-labs.com/magic/man2html/2/arg */
extern char	*argv0;

#define _ARGSET(x) (x)=0
#define _ARGUSED(x) if(x){}else

#define	ARGBEGIN	for((argv?0:(argv=(void*)&argc)),(argv0?0:(argv0=*argv)),\
			    argv++,argc--;\
			    argv[0] && argv[0][0]=='-' && argv[0][1];\
			    argc--, argv++) {\
				char *_args, *_argt;\
				char _argc;\
				_args = &argv[0][1];\
				if(_args[0]=='-' && _args[1]==0){\
					argc--; argv++; break;\
				}\
				_argc = 0;\
				while(*_args && (_argc = *_args++))\
				switch(_argc)
#define	ARGEND		_ARGSET(_argt);_ARGUSED(_argt);_ARGUSED(_argc);_ARGUSED(_args);}_ARGUSED(argv);_ARGUSED(argc);
#define	ARGF()		(_argt=_args, _args="",\
				(*_argt? _argt: argv[1]? (argc--, *++argv): 0))
#define	EARGF(x)	(_argt=_args, _args="",\
				(*_argt? _argt: argv[1]? (argc--, *++argv): ((x), abort(), (char*)0)))

#define	ARGC()		_argc