implement Fsmodule;include "sys.m";	sys: Sys;include "draw.m";include "sh.m";include "fslib.m";	fslib: Fslib;	Report, Value, type2s, quit: import fslib;	Fschan, Fsdata, Entrychan, Entry,	Gatechan, Gatequery, Nilentry, Option,	Next, Down, Skip, Quit: import Fslib; types(): string{	return "pppp*";} badmod(p: string){	sys->fprint(sys->fildes(2), "fs: size: cannot load %s: %r\n", p);	raise "fail:bad module";} init(){	sys = load Sys Sys->PATH;	fslib = load Fslib Fslib->PATH;	if(fslib == nil)		badmod(Fslib->PATH);} run(nil: ref Draw->Context, nil: ref Report,			nil: list of Option, args: list of ref Value): ref Value{	c := chan of Gatequery;	spawn orgate(c, args);	return ref Value.P(c);} orgate(c: Gatechan, args: list of ref Value){	sub: list of Gatechan;	for(; args != nil; args = tl args)		sub = (hd args).p().i :: sub;	sub = rev(sub);	myreply := chan of int;	while(((d, reply) := <-c).t0.t0 != nil){		for(l := sub; l != nil; l = tl l){			(hd l) <-= (d, myreply);			if(<-myreply)				break;		}		reply <-= l != nil;	}	for(; sub != nil; sub = tl sub)		hd sub <-= (Nilentry, nil);} rev[T](x: list of T): list of T{	l: list of T;	for(; x != nil; x = tl x)		l = hd x :: l;	return l;}