2 client side js functions for encoding/decoding objects into linear strings
4 Copyright Andrew Tridgell 2005
5 released under the GNU GPL Version 3 or later
10 enc = encodeObject(obj);
11 obj = decodeObject(enc);
13 The encoded format of the object is a string that is safe to
16 Note that only data elements are encoded, not functions
19 function count_members(o) {
27 function encodeObject(o) {
28 var i, r = count_members(o) + ":";
32 r = r + "" + i + ":" + t + ":" + encodeObject(o[i]);
33 } else if (t == 'string') {
34 var s = encodeURIComponent(o[i]).replace(/%/g,'#');
35 r = r + "" + i + ":" + t + ":" + s + ":";
36 } else if (t == 'boolean' || t == 'number') {
37 r = r + "" + i + ":" + t + ":" + o[i] + ":";
38 } else if (t == 'undefined' || t == 'null') {
39 r = r + "" + i + ":" + t + ":";
40 } else if (t != 'function') {
41 alert("Unable to encode type " + t);
47 function decodeObjectArray(a) {
49 var i, count = a[a.i]; a.i++;
50 for (i=0;i<count;i++) {
51 var name = a[a.i]; a.i++;
52 var type = a[a.i]; a.i++;
54 if (type == 'object') {
55 o[name] = decodeObjectArray(a);
56 } else if (type == "string") {
57 value = decodeURIComponent(a[a.i].replace(/#/g,'%')); a.i++;
59 } else if (type == "boolean") {
60 value = a[a.i]; a.i++;
61 if (value == 'true') {
66 } else if (type == "undefined") {
68 } else if (type == "null") {
70 } else if (type == "number") {
71 value = a[a.i]; a.i++;
74 alert("Unable to delinearise type " + type);
80 function decodeObject(str) {
81 var a = str.split(':');
83 return decodeObjectArray(a);