evdev events read and parse

gistfile1.js

var fs = require('fs');
var read = function(device){
    , stream;
  try {
      stream = fs.createReadStream(device, {
          flags: 'r',
          encoding: null
      })
      .on('data', function(buf){
        var i,j,chunk = 24;
        for (i=0,j=buf.length; i<j; i+=chunk) {
            parse(buf.slice(i,i+chunk));
        }
      })
      .on("error",function(e){
        console.log("Error %s - When reading %s",e,device);
      });
  } catch(e){
      return e;
  }
  return stream;
};

var parse = function(event){
  var event = {
      time : {tv_sec:null,tv_usec:null},
      type : null,
      code : null,
      value : null
    }
    , low = 0;

  low = buf.readInt32LE(0);
  event.time.tv_sec = buf.readInt32LE(4) * 4294967296.0 + low;
  if (low < 0) time.tv_sec += 4294967296;
  low = buf.readInt32LE(8);
  event.time.tv_usec = buf.readInt32LE(12) * 4294967296.0 + low;
  if (low < 0) time.tv_usec += 4294967296;
  event.type = buf.readUInt16LE(16);
  event.code = buf.readUInt16LE(18);
  event.value = buf.readUInt32LE(20);
  return event;
}