Example #1
0
  @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;
  }
Example #2
0
  @BIF
  public static ESeq reverse(ESeq front, ESeq res) {
    while (!front.isNil()) {
      res = res.cons(front.head());
      front = front.tail();
    }

    return res;
  }
Example #3
0
  @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;
  }
Example #4
0
  @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);
  }
Example #5
0
  @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;
  }
Example #6
0
  @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;
  }
Example #7
0
  @BIF
  public static EObject spawn_opt(EProc self, EObject tup) throws Pausable {
    ETuple t;
    EAtom m;
    EAtom f;
    ESeq a;
    ESeq o;
    if ((t = tup.testTuple()) == null
        || t.arity() != 4
        || (m = t.elm(1).testAtom()) == null
        || (f = t.elm(2).testAtom()) == null
        || (a = t.elm(3).testSeq()) == null
        || (o = t.elm(4).testSeq()) == null) throw ERT.badarg(tup);

    boolean link = false;
    boolean monitor = false;
    EAtom priority = null;

    for (; !o.isNil(); o = o.tail()) {
      EObject val = o.head();

      ETuple2 t2;
      if (val == am_link) {
        link = true;
      } else if (val == am_monitor) {
        monitor = true;
      } else if ((t2 = ETuple2.cast(val)) != null) {

        if (t2.elm(1) == am_priority) {
          EAtom am = t2.elm(2).testAtom();
          if (am != null) priority = am;
        }

        // ignore full_sweep_after and min_heap_size
      }
    }

    EProc p2 = new EProc(self.group_leader(), m, f, a);

    if (link) {
      self.link_to(p2);
    }

    if (priority != null) {
      // may throw badarg!
      p2.process_flag(am_priority, priority);
    }

    ERef ref = null;
    if (monitor) {
      ref = ERT.getLocalNode().createRef();

      if (!self.monitor(p2.self_handle(), p2.self_handle(), ref)) {
        throw new InternalError("cannot monitor new process?");
        // self.mbox_send(ETuple.make(ERT.am_DOWN, ref, p2.self_handle(), ERT.am_noproc));
      }
    }

    ERT.run(p2);

    if (monitor) {
      return new ETuple2(p2.self_handle(), ref);
    } else {
      return p2.self_handle();
    }
  }