Stream.js

module.exports = Stream;

var Parser = require("./WritableStream.js");

function Stream(options) {
    Parser.call(this, new Cbs(this), options);
}

require("inherits")(Stream, Parser);

Stream.prototype.readable = true;

function Cbs(scope) {
    this.scope = scope;
}

var EVENTS = require("../").EVENTS;

Object.keys(EVENTS).forEach(function(name) {
    if (EVENTS[name] === 0) {
        Cbs.prototype["on" + name] = function() {
            this.scope.emit(name);
        };
    } else if (EVENTS[name] === 1) {
        Cbs.prototype["on" + name] = function(a) {
            this.scope.emit(name, a);
        };
    } else if (EVENTS[name] === 2) {
        Cbs.prototype["on" + name] = function(a, b) {
            this.scope.emit(name, a, b);
        };
    } else {
        throw Error("wrong number of arguments!");
    }
});