Fixed bug with a bignum conversion in bitmap pack/unpack;

Clean-up some commented lines;
Added cache for bitmap.length;

lib/packer/b.js

@@ -1,30 +1,28 @@
+var bignum = require('bignum');
 
 exports.unpack = function(msg, packager) {
-	
+
 	var chunk = msg;
 	var chunkBin, data = '', bitmap = '';
-	
+
 	do {
 		chunk = msg.substring(0, packager.length);
-		chunkBitmap = parseInt(chunk, 16).toString(2);
+		chunkBitmap = bignum(chunk, 16).toString(2);
 		while (chunkBitmap.length < (packager.length * 4)) {
 			chunkBitmap = '0' + chunkBitmap;
 		}
 		data += chunk;
 		bitmap += chunkBitmap;
 		msg = msg.substr(packager.length);
 	} while(chunkBitmap[0] > 0);
-	
+
 	var fieldIds = [];
 	for(var i in bitmap) {
 		if (i > 0 && bitmap[i] == 1) {
 			fieldIds.push(parseInt(i) + 1);
 		}
 	}
-
-	//console.log(data);
-	//console.log(bitmap);
-
+
 	return {
 		data: data,
 		bitmap: bitmap,
@@ -35,7 +33,7 @@ exports.unpack = function(msg, packager) {
 
 exports.pack = function(data, packager) {
 	var bitmap = '';
-	
+
 	var lastIndex = 0;
 	for (var i in data) {
 		if (i > 1) {
@@ -47,20 +45,16 @@ exports.pack = function(data, packager) {
 			lastIndex = i;
 		}
 	}
-
-	var length = Math.ceil(bitmap.length / (packager.length * 4)) * (packager.length * 4);
+
 	var blength = bitmap.length;
+	var length = Math.ceil(blength / (packager.length * 4)) * (packager.length * 4);
+
 	for(var i = 0; i < length - blength; i++) {
 		bitmap += '0';
 	}
-
-	var msg = parseInt(bitmap,2).toString(16).toUpperCase();
-
-	//console.log(msg);
-	//console.log(bitmap);
-
-
-
+
+	var msg = bignum(bitmap,2).toString(16).toUpperCase();
+
 	return {
 		msg: msg,
 		bitmap: bitmap

package.json

@@ -14,5 +14,8 @@
   "main": "./index",
   "engines": {
     "node": "*"
+  },
+  "dependencies": {
+    "bignum": "^0.9.0"
   }
 }