toAscii && fromAscii moved to utils

lib/utils.js

@@ -33,7 +33,49 @@ var findIndex = function (array, callback) {
     return end ? i - 1 : -1;
 };
 
-module.exports = {
-    findIndex: findIndex
+/// @returns ascii string representation of hex value prefixed with 0x
+var toAscii = function(hex) {
+// Find termination
+    var str = "";
+    var i = 0, l = hex.length;
+    if (hex.substring(0, 2) === '0x') {
+        i = 2;
+    }
+    for (; i < l; i+=2) {
+        var code = parseInt(hex.substr(i, 2), 16);
+        if (code === 0) {
+            break;
+        }
+
+        str += String.fromCharCode(code);
+    }
+
+    return str;
+};
+    
+var toHex = function(str) {
+    var hex = "";
+    for(var i = 0; i < str.length; i++) {
+        var n = str.charCodeAt(i).toString(16);
+        hex += n.length < 2 ? '0' + n : n;
+    }
+
+    return hex;
+};
+
+/// @returns hex representation (prefixed by 0x) of ascii string
+var fromAscii = function(str, pad) {
+    pad = pad === undefined ? 0 : pad;
+    var hex = toHex(str);
+    while (hex.length < pad*2)
+        hex += "00";
+    return "0x" + hex;
+};
+
+
+module.exports = {
+    findIndex: findIndex,
+    toAscii: toAscii,
+    fromAscii: fromAscii
 };