1 files changed, 100 insertions, 0 deletions
diff --git a/source4/scripting/libjs/encoder.js b/source4/scripting/libjs/encoder.js
new file mode 100644
index 0000000000..65b2854d30
--- /dev/null
+++ b/source4/scripting/libjs/encoder.js
@@ -0,0 +1,100 @@
+/*
+	server side js functions for encoding/decoding objects into linear strings
+
+	Copyright Andrew Tridgell 2005
+	released under the GNU GPL Version 2 or later
+*/
+/*
+	usage:
+
+	  enc = encodeObject(obj);
+	  obj = decodeObject(enc);
+
+       The encoded format of the object is a string that is safe to
+       use in URLs
+
+       Note that only data elements are encoded, not functions
+*/
+
+function __count_members(o) {
+	var i, count = 0;
+	for (i in o) { 
+		count++;  
+	}
+	return count;
+}
+
+function __replace(str, old, rep) {
+	var s = string_init();
+	var a = s.split(old, str);
+	var j = s.join(rep, a);
+	return s.join(rep, a);
+}
+
+function encodeObject(o) {
+	var s = string_init();
+	var i, r = s.sprintf("%u:", __count_members(o));
+	for (i in o) {
+		var t = typeof(o[i]);
+		if (t == 'object' && o[i] == null) {
+			t = 'null';
+		}
+		if (t == 'object') {
+			r = s.sprintf("%s%s:%s:%s", r, i, t, encodeObject(o[i]));
+		} else if (t == "string") {
+			var enc = s.encodeURIComponent(o[i]);
+			var rep = __replace(enc, '%', '#');
+			r = s.sprintf("%s%s:%s:%s:", 
+				      r, i, t, __replace(s.encodeURIComponent(o[i]),'%','#'));
+		} else if (t == "boolean" || t == "number") {
+			r = s.sprintf("%s%s:%s:%s:", r, i, t, "" + o[i]);
+		} else if (t == "undefined" || t == "null") {
+			r = s.sprintf("%s%s:%s:", r, i, t);
+		} else {
+			println("Unable to linearise type " + t);
+		}
+	}
+	return r;
+}
+
+function decodeObjectArray(a) {
+	var s = string_init();
+	var o = new Object();
+	var i, count = a[a.i]; a.i++;
+	for (i=0;i<count;i++) {
+		var name  = a[a.i]; a.i++;
+		var type  = a[a.i]; a.i++;
+		var value;
+		if (type == 'object') {
+			o[name] = decodeObjectArray(a);
+		} else if (type == "string") {
+			value = s.decodeURIComponent(__replace(a[a.i],'#','%')); a.i++;
+			o[name] = value;
+		} else if (type == "boolean") {
+			value = a[a.i]; a.i++;
+			if (value == 'true') {
+				o[name] = true;
+			} else {
+				o[name] = false;
+			}
+		} else if (type == "undefined") {
+			o[name] = undefined;
+		} else if (type == "null") {
+			o[name] = null;
+		} else if (type == "number") {
+			value = a[a.i]; a.i++;
+			o[name] = value + 0;
+		} else {
+			println("Unable to delinearise type " + t);
+			assert(t == "supported type");
+		}
+	}
+	return o;
+}
+
+function decodeObject(str) {
+	var s = string_init();
+	var a = s.split(':', str);
+	a.i = 0;
+	return decodeObjectArray(a);
+}