@JRubyMethod(name = "_id2ref", required = 1, module = true, visibility = Visibility.PRIVATE)
public static IRubyObject id2ref(IRubyObject recv, IRubyObject id) {
Ruby runtime = id.getRuntime();
if (!(id instanceof RubyFixnum)) {
throw recv.getRuntime().newTypeError(id, recv.getRuntime().getFixnum());
}
RubyFixnum idFixnum = (RubyFixnum) id;
long longId = idFixnum.getLongValue();
if (longId == 0) {
return runtime.getFalse();
} else if (longId == 2) {
return runtime.getTrue();
} else if (longId == 4) {
return runtime.getNil();
} else if (longId % 2 != 0) {
// odd
return runtime.newFixnum((longId - 1) / 2);
} else {
if (runtime.isObjectSpaceEnabled()) {
IRubyObject object = runtime.getObjectSpace().id2ref(longId);
if (object == null) {
return runtime.getNil();
}
return object;
} else {
runtime
.getWarnings()
.warn("ObjectSpace is disabled; _id2ref only supports immediates, pass -X+O to enable");
return runtime.getNil();
}
}
}
public static int fix2int(RubyFixnum arg) {
long num = arg.getLongValue();
checkInt(arg, num);
return (int) num;
}
