String-ArrayBuffer conversion

CREDITS.md

@@ -17,3 +17,8 @@
 * Andrew Kepert
 * Ydnar
 * Lostinet
+
+
+## [String/ArrayBuffer conversion](http://updates.html5rocks.com/2012/06/How-to-convert-ArrayBuffer-to-and-from-String)
+
+* Renato Mangini

manifest.json

@@ -7,6 +7,7 @@
     "app": {
 	"background": {
 	    "scripts": ["third-party/md5-min.js",
+			"third-party/ab-str.js",
 			"lib/ns_client.js",
 			"background.js"
 		       ]

third-party/ab-str.js

@@ -0,0 +1,18 @@
+//
+// Renato Mangini
+// http://updates.html5rocks.com/2012/06/How-to-convert-ArrayBuffer-to-and-from-String
+// http://stackoverflow.com/questions/6965107/converting-between-strings-and-arraybuffers
+//
+
+function ab2str(buf) {
+    return String.fromCharCode.apply(null, new Uint16Array(buf));
+}
+
+function str2ab(str) {
+    var buf = new ArrayBuffer(str.length*2); // 2 bytes for each char
+    var bufView = new Uint16Array(buf);
+    for (var i=0, strLen=str.length; i<strLen; i++) {
+        bufView[i] = str.charCodeAt(i);
+    }
+    return buf;
+}