var EventEmitter = exports.EventEmitter = process.EventEmitter; 
var isArray = Array.isArray; 
EventEmitter.prototype.emit = function (type){ 
if (type === 'error') { 
if (!this._events || !this._events.error || (isArray(this._events.error) && !_AN_Read_length('length', this._events.error))) { 
if (arguments[1] instanceof Error) { 
throw arguments[1]
} 
 else { 
throw new Error("Uncaught, unspecified 'error' event.")
} 
return false ; 
} 
} 
if (!this._events) return false ; 
var handler = this._events[type]; 
if (!handler) return false ; 
if (typeof handler == 'function') { 
switch (arguments.length){ 
case 1: handler.call(this); 
break ; 
case 2: handler.call(this, arguments[1]); 
break ; 
case 3: handler.call(this, arguments[1], arguments[2]); 
break ; 
default : { 
var args = Array.prototype.slice.call(arguments, 1); 
handler.apply(this, args); 
} 
} 
return true ; 
} 
 else if (isArray(handler)) { 
var args = Array.prototype.slice.call(arguments, 1); 
var listeners = handler.slice(); 
for (var i = 0, l = _AN_Read_length('length', listeners); 
i < l; i++ ){ 
listeners[i].apply(this, args); 
} 
return true ; 
} 
 else { 
return false ; 
} 
} 
; 
EventEmitter.prototype.addListener = function (type, listener){ 
if ('function' !== typeof listener) { 
throw new Error('addListener only takes instances of Function')
} 
if (!this._events) this._events = { 
}
; 
this.emit('newListener', type, listener); 
if (!this._events[type]) { 
this._events[type] = listener; 
} 
 else if (isArray(this._events[type])) { 
this._events[type].push(listener); 
} 
 else { 
this._events[type] = [this._events[type], listener] ; 
} 
return this; 
} 
; 
EventEmitter.prototype.on = EventEmitter.prototype.addListener; 
EventEmitter.prototype.once = function (type, listener){ 
var self = this; 
self.on(type, function g(){ 
self.removeListener(type, g); 
listener.apply(this, arguments); 
} 
); 
} 
; 
EventEmitter.prototype.removeListener = function (type, listener){ 
if ('function' !== typeof listener) { 
throw new Error('removeListener only takes instances of Function')
} 
if (!this._events || !this._events[type]) return this; 
var list = this._events[type]; 
if (isArray(list)) { 
var i = list.indexOf(listener); 
if (i < 0) return this; 
list.splice(i, 1); 
if (_AN_Read_length('length', list) == 0) delete this._events[type]; 
} 
 else if (this._events[type] === listener) { 
delete this._events[type]; 
} 
return this; 
} 
; 
EventEmitter.prototype.removeAllListeners = function (type){ 
if (type && this._events && this._events[type]) this._events[type] = null ; 
return this; 
} 
; 
EventEmitter.prototype.listeners = function (type){ 
if (!this._events) this._events = { 
}
; 
if (!this._events[type]) this._events[type] = [] ; 
if (!isArray(this._events[type])) { 
this._events[type] = [this._events[type]] ; 
} 
return this._events[type]; 
} 
;