ev3js/util.js

LEGO Mindstorms EV3 API for Node.js

var fs = require('fs'),
    EventEmitter = require('events').EventEmitter;

var util = {};

util.event = function(obj){
    obj.prototype = new EventEmitter();
};

util.poll = function(path, len, callback){
    var cancel = false;
    fs.open(path, 'r', function(err, fd){
        if(err){
            throw(err);
        }
        var buf = new Buffer(len);
        while(cancel === false){
            fs.readSync(fd, buf, 0, len, null);
            var data = new Buffer(len);
            buf.copy(data);
            callback(data);
        }
        fs.close(fd);
    });
    return function(){
        cancel = true;
    };
};

util.read = function(path){
    return fs.readFileSync(path);
};

util.readString = function(path){
    return fs.readFileSync(path, {encoding: 'utf-8'});
}

module.exports = util;