@BIF
public static ESeq reverse(EObject hd, EObject tl) {
ESeq res = tl.testSeq();
ESeq front = hd.testSeq();
if (res == null) throw ERT.badarg(hd, tl);
return reverse(front, res);
}
@BIF
public static EObject keysearch(EObject k, EObject n, EObject list) {
ESmall idx = n.testSmall();
ESeq src = list.testSeq();
if (k == null || idx == null || src == null || idx.value < 1) throw ERT.badarg(k, n, list);
int index = idx.value;
while (!src.isNil()) {
EObject elm = src.head();
ETuple tup;
if ((tup = elm.testTuple()) != null) {
if (tup.arity() >= index) {
if (tup.elm(index).equals(k)) {
return new ETuple2(ERT.am_value, tup);
}
}
}
src = src.tail();
}
return ERT.FALSE;
}
@BIF
public static EAtom member(EObject e, EObject l) {
ESeq list = l.testSeq();
if (list == null) throw ERT.badarg(e, l);
while (!list.isNil()) {
if (e.equals(list.head())) return ERT.TRUE;
list = list.tail();
}
return ERT.FALSE;
}
@BIF
public static EObject hibernate(EProc self, EObject a1, EObject a2, EObject a3) {
EAtom m = a1.testAtom();
EAtom f = a2.testAtom();
ESeq a = a3.testSeq();
if (m == null || f == null || a == null) {
throw ERT.badarg(a1, a2, a3);
}
int arity = a.length();
EFun target = EModuleManager.resolve(new FunID(m, f, arity));
if (target == null) {
throw new ErlangUndefined(m, f, new ESmall(arity));
}
self.tail = target;
a = a.reverse();
switch (arity) {
default:
throw new NotImplemented("hibernate w/" + arity + " args");
case 7:
self.arg6 = a.head();
a = a.tail();
case 6:
self.arg5 = a.head();
a = a.tail();
case 5:
self.arg4 = a.head();
a = a.tail();
case 4:
self.arg3 = a.head();
a = a.tail();
case 3:
self.arg2 = a.head();
a = a.tail();
case 2:
self.arg1 = a.head();
a = a.tail();
case 1:
self.arg0 = a.head(); // a = a.tail();
case 0:
}
throw ErjangHibernateException.INSTANCE;
}
@BIF
public static EObject spawn(EProc proc, EObject mod, EObject fun, EObject args) {
EAtom m = mod.testAtom();
EAtom f = fun.testAtom();
ESeq a = args.testSeq();
if (m == null || f == null || a == null) throw ERT.badarg(mod, fun, args);
EProc p2 = new EProc(proc.group_leader(), m, f, a);
ERT.run(p2);
return p2.self_handle();
}
@BIF
public static ESeq map(EProc proc, EObject f, EObject s) throws Pausable {
EFun fun = f.testFunction2(1);
ESeq seq = s.testSeq();
if (fun == null || seq == null) throw ERT.badarg(f, s);
EObject[] arg = new EObject[1];
ESeq rev = ERT.NIL;
for (; !seq.isNil(); seq = seq.tail()) {
arg[0] = seq.head();
rev = rev.cons(fun.invoke(proc, arg));
}
return reverse(rev, ERT.NIL);
}
public static EObject demonitor(ETask<?> self, EObject ref, EObject options) throws Pausable {
ERef r = ref.testReference();
ESeq o = options.testSeq();
if (r == null || o == null) throw ERT.badarg(ref, options);
boolean flush = (!o.isNil() && o.head() == am_flush);
EObject found = self.demonitor(r);
if (found == null) {
return ERT.FALSE;
}
EHandle h;
ETuple tup;
EAtom name;
EAtom node;
if ((h = found.testHandle()) != null) {
h.remove_monitor(self.self_handle(), r, flush);
} else if ((tup = found.testTuple()) != null
&& tup.arity() == 2
&& (name = tup.elm(1).testAtom()) != null
&& (node = tup.elm(2).testAtom()) != null) {
EAbstractNode n = EAbstractNode.get_or_connect(self, node);
if (n != null) {
n.dsig_demonitor(self.self_handle(), r, name);
}
}
if (flush && (self instanceof EProc)) {
flush_monitor_message.invoke((EProc) self, new EObject[] {ref, ERT.am_ok});
}
return ERT.TRUE;
}
@BIF
public static EObject keyfind(EObject key, EObject nth_arg, EObject list_arg) {
ESmall nth = nth_arg.testSmall();
ESeq list = list_arg.testSeq();
if (key == null || nth == null | list == null) throw ERT.badarg(key, nth_arg, list_arg);
while (!list.isNil()) {
EObject elm = list.head();
ETuple tup = elm.testTuple();
// test that it is a tuple of the right size
if (tup != null && tup.arity() >= nth.value) {
EObject val = tup.elm(nth.value);
if (val.equals(key)) {
return tup;
}
}
list = list.tail();
}
return ERT.FALSE;
}
