new 'plugin' 'ready' and 'command' functions

bukkit-plugin/src/net/walterhiggins/scriptcraft/ScriptCraftPlugin.java

@@ -124,7 +124,7 @@ public class ScriptCraftPlugin extends JavaPlugin
             }
             result = true;
         } else if (cmd.getName().equalsIgnoreCase("jsp")){
-            javascriptCode = "command.invoke()";
+            javascriptCode = "command()";
             this.engine.put("__cmdArgs",args);
             result = true;
         }

js-plugins/core/_scriptcraft.js

@@ -1,7 +1,24 @@
+/*
+  This file defines commonly used functions by all plugins...
+  
+  load (filename) - loads and evaluates a javascript file, returning the evaluated object.
+  
+  save (object, filename) - saves an object to a file.
+
+  plugin (name, interface, isPersistent) - defines a new plugin. If isPersistent is true then
+                                           the plugin doesn't have to worry about loading and saving
+														 state - that will be done by the framework. Just make sure 
+														 that anything you want to save (and restore) is in the 'store'
+														 property - this will be created automatically if not already defined.
+														 (its type is object {} )
+
+  ready (function) - specifies code to be executed only when all the plugins have loaded.
+
+  command (name, function) - defines a command that can be used by non-operators.
+  
+*/
 var global = this;
-var verbose = verbose || false;
+var verbose = true;//verbose || false;
-var ScriptCraft = ScriptCraft || {};
-ScriptCraft.core = ScriptCraft.core || {};
 //
 // private implementation
 //
@@ -12,12 +29,22 @@ ScriptCraft.core = ScriptCraft.core || {};
     if (typeof load == "function")
         return ;
 
+    var _canonize = function(file){ return file.getCanonicalPath().replaceAll("\\\\","/"); };
+    
     var _originalScript = __script;
-    //importPackage(java.io);
+	 var parentFileObj = new java.io.File(__script).getParentFile();
-    var _canonize = function(file){
+	 var jsPluginsRootDir = parentFileObj.getParentFile();
-        return file.getCanonicalPath().replaceAll("\\\\","/");
+	 var jsPluginsRootDirName = _canonize(jsPluginsRootDir);
-    };
+
-    var _load = function(filename){
+
+	 /*
+
+		Load the contents of the file and evaluate as javascript
+		
+	  */
+    var _load = function(filename)
+	 {
+		  var result = null;
         var file = new java.io.File(filename);
 
 		  var canonizedFilename = _canonize(file);
@@ -30,11 +57,17 @@ ScriptCraft.core = ScriptCraft.core || {};
             var reader = new java.io.FileReader(file);
             __engine.put("__script",canonizedFilename);
             __engine.put("__folder",(parent?_canonize(parent):"")+"/");
-            __engine.eval(reader);
+            result = __engine.eval(reader);
         }else{
             print("Error: " + canonizedFilename + " not found");
         }
+		  return result;
     };
+	 /*
+		
+		recursively walk the given directory and return a list of all .js files 
+		
+	  */
     var _listJsFiles = function(store,dir)
     {
         if (typeof dir == "undefined"){
@@ -55,6 +88,11 @@ ScriptCraft.core = ScriptCraft.core || {};
             }
         }
     };
+	 /*
+
+		Reload all of the .js files in the given directory 
+		
+	 */
     var _reload = function(pluginDir)
     {
         var jsFiles = [];
@@ -73,6 +111,77 @@ ScriptCraft.core = ScriptCraft.core || {};
             load(_canonize(jsFiles[i]));
         }
     };
+
+	 /*
+		
+		Save a javascript object to a file (saves using JSON notation)
+		
+	 */
+	 var _save = function(object, filename){
+		  var objectToStr = JSON.stringify(object);
+		  var f = new java.io.File(filename);
+		  print(filename);
+		  var out = new java.io.PrintWriter(new java.io.FileWriter(f));
+		  out.println("__data = " + objectToStr);
+		  out.close();
+	 };
+
+
+	 /*
+		plugin mgmt
+	 */
+	 var _plugins = {};
+	 var _plugin = function(/* String */ moduleName, /* Object */ moduleObject, isPersistent)
+	 {
+		  //
+		  // don't load plugin more than once
+		  //
+		  if (typeof _plugins[moduleName] != "undefined")
+				return;
+
+		  var pluginData = {persistent: isPersistent, module: moduleObject};
+		  moduleObject.store = moduleObject.store || {};
+		  _plugins[moduleName] = pluginData;
+
+		  if (isPersistent)
+				moduleObject.store = load(jsPluginsRootDirName + "/" + moduleName + "-store.txt") || {};
+		  
+		  global[moduleName] = moduleObject;
+	 };
+	 /*
+		allow for deferred execution (once all modules have loaded)
+	  */
+	 var _deferred = [];
+	 var _ready = function( func ){
+		  _deferred.push(func);
+	 };
+	 /* 
+		 command management - allow for non-ops to execute approved javascript code.
+	  */
+	 var _commands = {};
+	 var _command = function(name,func){
+		  if (typeof name == "undefined"){
+				// it's an invocation from the Java Plugin!
+				if (__cmdArgs.length === 0)
+					 throw new Error("Usage: jsp command-name command-parameters");
+				var name = __cmdArgs[0];
+				func = _commands[name]
+				if (typeof func === "undefined")
+					 throw new Error("Command '" + name + "' does not exist.");
+				var params = [];
+				for (var i =1; i < __cmdArgs.length;i++){
+					 params.push("" + __cmdArgs[i]);
+				}
+				return func(params);
+		  }else{
+				_commands[name] = func;
+				return func;
+		  }
+	 };
+
+	 /*
+		Tab Completion of the /js and /jsp commands
+	 */
     var _isJavaObject = function(o){
         var result = false;
         try {
@@ -88,9 +197,11 @@ ScriptCraft.core = ScriptCraft.core || {};
     var _getProperties = function(o)
     {
         var result = [];
-        if (_isJavaObject(o)){
+        if (_isJavaObject(o))
+		  {
             propertyLoop:
-            for (var i in o){
+            for (var i in o)
+				{
                 //
                 // don't include standard Object methods
                 //
@@ -117,9 +228,23 @@ ScriptCraft.core = ScriptCraft.core || {};
         }
         return result.sort();
     };
-
+	 /*
-    var __onTabComplete2 = function()
+		Tab completion for the /jsp commmand
+	 */
+	 var __onTabCompleteJSP = function() {
+		  var result = global.__onTC_result;
+		  for (var i in _commands)
+				result.add(i);
+		  return result;
+	 };
+	 /*
+		Tab completion for the /js command
+	 */
+    var __onTabCompleteJS = function()
     {
+		  if (__onTC_cmd.name == "jsp")
+				return __onTabCompleteJSP()
+
         var _globalSymbols = _getProperties(global)
         var result = global.__onTC_result;
         var args = global.__onTC_args;
@@ -127,9 +252,9 @@ ScriptCraft.core = ScriptCraft.core || {};
         var statement = args.join(" ");
 		  statement = statement.replace(/^\s+/,"").replace(/\s+$/,"");
 		  
-        if (statement.length == 0){
+        if (statement.length == 0)
 				propsOfLastArg = _globalSymbols;
-        }else{
+        else{
             var statementSyms = statement.split(/[^a-zA-Z0-9_\.]/);
             var lastSymbol = statementSyms[statementSyms.length-1];
             //
@@ -158,53 +283,67 @@ ScriptCraft.core = ScriptCraft.core || {};
 								// ScriptCraft.
 								//
                         for (var i =0;i < objectProps.length;i++)
-                            propsOfLastArg.push(statement+objectProps[i]);;
+                            propsOfLastArg.push(statement+objectProps[i]);
-                    }else{
+								
+						  }else{
 								// it looks like this..
 								// ScriptCraft.co
 								//
 								var li = statement.lastIndexOf(name);
 								statement = statement.substring(0,li);
 
-                        for (var i = 0; i < objectProps.length;i++){
+                        for (var i = 0; i < objectProps.length;i++)
-                            if (objectProps[i].indexOf(name) == 0){
+                            if (objectProps[i].indexOf(name) == 0)
                                 propsOfLastArg.push(statement + objectProps[i]);
-                            }
+								
-                        }
                     }
                 }else{
                     var objectProps = _getProperties(symbol);
-                    for (var i = 0; i < objectProps.length; i++){
+                    for (var i = 0; i < objectProps.length; i++)
                         propsOfLastArg.push(statement + objectProps[i]);
-                    }
                 }
             }else{
                 // loop thru globalSymbols looking for a good match
-                for (var i = 0;i < _globalSymbols.length; i++){
+                for (var i = 0;i < _globalSymbols.length; i++)
-                    if (_globalSymbols[i].indexOf(lastSymbol) == 0){
+                    if (_globalSymbols[i].indexOf(lastSymbol) == 0)
                         propsOfLastArg.push(statement.replace(lastSymbol,_globalSymbols[i]));
-                    }
+					 
-                }
             }
         }
-        for (var i = 0;i < propsOfLastArg.length; i++){
+        for (var i = 0;i < propsOfLastArg.length; i++)
             result.add(propsOfLastArg[i]);
-        }
     };
-    global._onTabComplete = __onTabComplete2;
 
+	 global.load = _load;
+	 global.save = _save;
+	 global.reload = _reload;
+	 global.plugin = _plugin;
+	 global.ready = _ready;
+	 global.command = _command;
+    global._onTabComplete = __onTabCompleteJS;
 
-    ScriptCraft.core.load = _load;
-    ScriptCraft.core.reload = _reload;
-
-    for (var f in ScriptCraft.core){
-        global[f] = ScriptCraft.core[f];
-    }
-    ScriptCraft.core.initialized = true;
     //
     // assumes this was loaded from js-plugins/core/
+	 // load all of the plugins.
     //
-    reload(new java.io.File(__script).getParentFile().getParentFile());
+    reload(jsPluginsRootDir);
+
+	 // 
+	 // all modules have loaded
+	 //
+	 for (var i =0;i < _deferred.length;i++)
+		  _deferred[i]();
+	 
+	 events.on("server.PluginDisableEvent",function(l,e){
+		  //
+		  // save all plugins which have persistent data
+		  //
+		  for (var moduleName in _plugins){
+				var pluginData = _plugins[moduleName];
+				if (pluginData.persistent)
+					 save(pluginData.module.store, jsPluginsRootDirName + "/" + moduleName + "-store.txt");
+		  }
+	 });
 	 
 }());
 

js-plugins/core/cmd.js

@@ -1,39 +0,0 @@
-/*
-  This module is responsible for managing commands which can be used by non-operator.
-  Since by default the /js command is op-only , there needs to be a way to expose javascript
-  functions/plugins to non-ops in a safe controlled way.
-  
-  This is where the 'command' module comes in. It allows javascript plugin authors to expose
-  javascript functions for use by non-operators. For example, ordinarily, non-ops don't have
-  permission to use the `/time set 0` command but this functionality can be exposed like this.
-
-  1. Operator / plugin-author creates a javascript function called 'day'
-  
-  var time_set = function(params){ __plugin.server.worlds.get(0).time = params[0]; };
-  command.register('time_set');
-  
-  2. The non-operator can now change the time to day...
-  /jsp time_set 0
-plugin("command", {
-
-	 register: function(name, func){
-		  this.store[name] = func;
-	 },
-
-	 invoke: function(){
-		  if (__cmdArgs.length === 0)
-				throw new Error("Usage: jsp command-name command-parameters");
-		  var name = __cmdArgs[0];
-		  var func = this.store[name]
-		  if (typeof func === "undefined")
-				throw new Error("Command '" + name + "' does not exist.");
-		  var params = [];
-		  for (var i =1; i < __cmdArgs.length;i++){
-				params.push("" + __cmdArgs[i]);
-		  }
-		  func(params);
-	 }
-});
-
-*/
-

js-plugins/ext/json2.js

@@ -0,0 +1,486 @@
+/*
+    json2.js
+    2012-10-08
+
+    Public Domain.
+
+    NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
+
+    See http://www.JSON.org/js.html
+
+
+    This code should be minified before deployment.
+    See http://javascript.crockford.com/jsmin.html
+
+    USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
+    NOT CONTROL.
+
+
+    This file creates a global JSON object containing two methods: stringify
+    and parse.
+
+        JSON.stringify(value, replacer, space)
+            value       any JavaScript value, usually an object or array.
+
+            replacer    an optional parameter that determines how object
+                        values are stringified for objects. It can be a
+                        function or an array of strings.
+
+            space       an optional parameter that specifies the indentation
+                        of nested structures. If it is omitted, the text will
+                        be packed without extra whitespace. If it is a number,
+                        it will specify the number of spaces to indent at each
+                        level. If it is a string (such as '\t' or ' '),
+                        it contains the characters used to indent at each level.
+
+            This method produces a JSON text from a JavaScript value.
+
+            When an object value is found, if the object contains a toJSON
+            method, its toJSON method will be called and the result will be
+            stringified. A toJSON method does not serialize: it returns the
+            value represented by the name/value pair that should be serialized,
+            or undefined if nothing should be serialized. The toJSON method
+            will be passed the key associated with the value, and this will be
+            bound to the value
+
+            For example, this would serialize Dates as ISO strings.
+
+                Date.prototype.toJSON = function (key) {
+                    function f(n) {
+                        // Format integers to have at least two digits.
+                        return n < 10 ? '0' + n : n;
+                    }
+
+                    return this.getUTCFullYear()   + '-' +
+                         f(this.getUTCMonth() + 1) + '-' +
+                         f(this.getUTCDate())      + 'T' +
+                         f(this.getUTCHours())     + ':' +
+                         f(this.getUTCMinutes())   + ':' +
+                         f(this.getUTCSeconds())   + 'Z';
+                };
+
+            You can provide an optional replacer method. It will be passed the
+            key and value of each member, with this bound to the containing
+            object. The value that is returned from your method will be
+            serialized. If your method returns undefined, then the member will
+            be excluded from the serialization.
+
+            If the replacer parameter is an array of strings, then it will be
+            used to select the members to be serialized. It filters the results
+            such that only members with keys listed in the replacer array are
+            stringified.
+
+            Values that do not have JSON representations, such as undefined or
+            functions, will not be serialized. Such values in objects will be
+            dropped; in arrays they will be replaced with null. You can use
+            a replacer function to replace those with JSON values.
+            JSON.stringify(undefined) returns undefined.
+
+            The optional space parameter produces a stringification of the
+            value that is filled with line breaks and indentation to make it
+            easier to read.
+
+            If the space parameter is a non-empty string, then that string will
+            be used for indentation. If the space parameter is a number, then
+            the indentation will be that many spaces.
+
+            Example:
+
+            text = JSON.stringify(['e', {pluribus: 'unum'}]);
+            // text is '["e",{"pluribus":"unum"}]'
+
+
+            text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
+            // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+
+            text = JSON.stringify([new Date()], function (key, value) {
+                return this[key] instanceof Date ?
+                    'Date(' + this[key] + ')' : value;
+            });
+            // text is '["Date(---current time---)"]'
+
+
+        JSON.parse(text, reviver)
+            This method parses a JSON text to produce an object or array.
+            It can throw a SyntaxError exception.
+
+            The optional reviver parameter is a function that can filter and
+            transform the results. It receives each of the keys and values,
+            and its return value is used instead of the original value.
+            If it returns what it received, then the structure is not modified.
+            If it returns undefined then the member is deleted.
+
+            Example:
+
+            // Parse the text. Values that look like ISO date strings will
+            // be converted to Date objects.
+
+            myData = JSON.parse(text, function (key, value) {
+                var a;
+                if (typeof value === 'string') {
+                    a =
+/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
+                    if (a) {
+                        return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+                            +a[5], +a[6]));
+                    }
+                }
+                return value;
+            });
+
+            myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
+                var d;
+                if (typeof value === 'string' &&
+                        value.slice(0, 5) === 'Date(' &&
+                        value.slice(-1) === ')') {
+                    d = new Date(value.slice(5, -1));
+                    if (d) {
+                        return d;
+                    }
+                }
+                return value;
+            });
+
+
+    This is a reference implementation. You are free to copy, modify, or
+    redistribute.
+*/
+
+/*jslint evil: true, regexp: true */
+
+/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
+    call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
+    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
+    lastIndex, length, parse, prototype, push, replace, slice, stringify,
+    test, toJSON, toString, valueOf
+*/
+
+
+// Create a JSON object only if one does not already exist. We create the
+// methods in a closure to avoid creating global variables.
+
+if (typeof JSON !== 'object') {
+    JSON = {};
+}
+
+(function () {
+    'use strict';
+
+    function f(n) {
+        // Format integers to have at least two digits.
+        return n < 10 ? '0' + n : n;
+    }
+
+    if (typeof Date.prototype.toJSON !== 'function') {
+
+        Date.prototype.toJSON = function (key) {
+
+            return isFinite(this.valueOf())
+                ? this.getUTCFullYear()     + '-' +
+                    f(this.getUTCMonth() + 1) + '-' +
+                    f(this.getUTCDate())      + 'T' +
+                    f(this.getUTCHours())     + ':' +
+                    f(this.getUTCMinutes())   + ':' +
+                    f(this.getUTCSeconds())   + 'Z'
+                : null;
+        };
+
+        String.prototype.toJSON      =
+            Number.prototype.toJSON  =
+            Boolean.prototype.toJSON = function (key) {
+                return this.valueOf();
+            };
+    }
+
+    var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
+        escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
+        gap,
+        indent,
+        meta = {    // table of character substitutions
+            '\b': '\\b',
+            '\t': '\\t',
+            '\n': '\\n',
+            '\f': '\\f',
+            '\r': '\\r',
+            '"' : '\\"',
+            '\\': '\\\\'
+        },
+        rep;
+
+
+    function quote(string) {
+
+// If the string contains no control characters, no quote characters, and no
+// backslash characters, then we can safely slap some quotes around it.
+// Otherwise we must also replace the offending characters with safe escape
+// sequences.
+
+        escapable.lastIndex = 0;
+        return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
+            var c = meta[a];
+            return typeof c === 'string'
+                ? c
+                : '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
+        }) + '"' : '"' + string + '"';
+    }
+
+
+    function str(key, holder) {
+
+// Produce a string from holder[key].
+
+        var i,          // The loop counter.
+            k,          // The member key.
+            v,          // The member value.
+            length,
+            mind = gap,
+            partial,
+            value = holder[key];
+
+// If the value has a toJSON method, call it to obtain a replacement value.
+
+        if (value && typeof value === 'object' &&
+                typeof value.toJSON === 'function') {
+            value = value.toJSON(key);
+        }
+
+// If we were called with a replacer function, then call the replacer to
+// obtain a replacement value.
+
+        if (typeof rep === 'function') {
+            value = rep.call(holder, key, value);
+        }
+
+// What happens next depends on the value's type.
+
+        switch (typeof value) {
+        case 'string':
+            return quote(value);
+
+        case 'number':
+
+// JSON numbers must be finite. Encode non-finite numbers as null.
+
+            return isFinite(value) ? String(value) : 'null';
+
+        case 'boolean':
+        case 'null':
+
+// If the value is a boolean or null, convert it to a string. Note:
+// typeof null does not produce 'null'. The case is included here in
+// the remote chance that this gets fixed someday.
+
+            return String(value);
+
+// If the type is 'object', we might be dealing with an object or an array or
+// null.
+
+        case 'object':
+
+// Due to a specification blunder in ECMAScript, typeof null is 'object',
+// so watch out for that case.
+
+            if (!value) {
+                return 'null';
+            }
+
+// Make an array to hold the partial results of stringifying this object value.
+
+            gap += indent;
+            partial = [];
+
+// Is the value an array?
+
+            if (Object.prototype.toString.apply(value) === '[object Array]') {
+
+// The value is an array. Stringify every element. Use null as a placeholder
+// for non-JSON values.
+
+                length = value.length;
+                for (i = 0; i < length; i += 1) {
+                    partial[i] = str(i, value) || 'null';
+                }
+
+// Join all of the elements together, separated with commas, and wrap them in
+// brackets.
+
+                v = partial.length === 0
+                    ? '[]'
+                    : gap
+                    ? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']'
+                    : '[' + partial.join(',') + ']';
+                gap = mind;
+                return v;
+            }
+
+// If the replacer is an array, use it to select the members to be stringified.
+
+            if (rep && typeof rep === 'object') {
+                length = rep.length;
+                for (i = 0; i < length; i += 1) {
+                    if (typeof rep[i] === 'string') {
+                        k = rep[i];
+                        v = str(k, value);
+                        if (v) {
+                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
+                        }
+                    }
+                }
+            } else {
+
+// Otherwise, iterate through all of the keys in the object.
+
+                for (k in value) {
+                    if (Object.prototype.hasOwnProperty.call(value, k)) {
+                        v = str(k, value);
+                        if (v) {
+                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
+                        }
+                    }
+                }
+            }
+
+// Join all of the member texts together, separated with commas,
+// and wrap them in braces.
+
+            v = partial.length === 0
+                ? '{}'
+                : gap
+                ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}'
+                : '{' + partial.join(',') + '}';
+            gap = mind;
+            return v;
+        }
+    }
+
+// If the JSON object does not yet have a stringify method, give it one.
+
+    if (typeof JSON.stringify !== 'function') {
+        JSON.stringify = function (value, replacer, space) {
+
+// The stringify method takes a value and an optional replacer, and an optional
+// space parameter, and returns a JSON text. The replacer can be a function
+// that can replace values, or an array of strings that will select the keys.
+// A default replacer method can be provided. Use of the space parameter can
+// produce text that is more easily readable.
+
+            var i;
+            gap = '';
+            indent = '';
+
+// If the space parameter is a number, make an indent string containing that
+// many spaces.
+
+            if (typeof space === 'number') {
+                for (i = 0; i < space; i += 1) {
+                    indent += ' ';
+                }
+
+// If the space parameter is a string, it will be used as the indent string.
+
+            } else if (typeof space === 'string') {
+                indent = space;
+            }
+
+// If there is a replacer, it must be a function or an array.
+// Otherwise, throw an error.
+
+            rep = replacer;
+            if (replacer && typeof replacer !== 'function' &&
+                    (typeof replacer !== 'object' ||
+                    typeof replacer.length !== 'number')) {
+                throw new Error('JSON.stringify');
+            }
+
+// Make a fake root object containing our value under the key of ''.
+// Return the result of stringifying the value.
+
+            return str('', {'': value});
+        };
+    }
+
+
+// If the JSON object does not yet have a parse method, give it one.
+
+    if (typeof JSON.parse !== 'function') {
+        JSON.parse = function (text, reviver) {
+
+// The parse method takes a text and an optional reviver function, and returns
+// a JavaScript value if the text is a valid JSON text.
+
+            var j;
+
+            function walk(holder, key) {
+
+// The walk method is used to recursively walk the resulting structure so
+// that modifications can be made.
+
+                var k, v, value = holder[key];
+                if (value && typeof value === 'object') {
+                    for (k in value) {
+                        if (Object.prototype.hasOwnProperty.call(value, k)) {
+                            v = walk(value, k);
+                            if (v !== undefined) {
+                                value[k] = v;
+                            } else {
+                                delete value[k];
+                            }
+                        }
+                    }
+                }
+                return reviver.call(holder, key, value);
+            }
+
+
+// Parsing happens in four stages. In the first stage, we replace certain
+// Unicode characters with escape sequences. JavaScript handles many characters
+// incorrectly, either silently deleting them, or treating them as line endings.
+
+            text = String(text);
+            cx.lastIndex = 0;
+            if (cx.test(text)) {
+                text = text.replace(cx, function (a) {
+                    return '\\u' +
+                        ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
+                });
+            }
+
+// In the second stage, we run the text against regular expressions that look
+// for non-JSON patterns. We are especially concerned with '()' and 'new'
+// because they can cause invocation, and '=' because it can cause mutation.
+// But just to be safe, we want to reject all unexpected forms.
+
+// We split the second stage into 4 regexp operations in order to work around
+// crippling inefficiencies in IE's and Safari's regexp engines. First we
+// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
+// replace all simple value tokens with ']' characters. Third, we delete all
+// open brackets that follow a colon or comma or that begin the text. Finally,
+// we look to see that the remaining characters are only whitespace or ']' or
+// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
+
+            if (/^[\],:{}\s]*$/
+                    .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
+                        .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
+                        .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
+
+// In the third stage we use the eval function to compile the text into a
+// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
+// in JavaScript: it can begin a block or an object literal. We wrap the text
+// in parens to eliminate the ambiguity.
+
+                j = eval('(' + text + ')');
+
+// In the optional fourth stage, we recursively walk the new structure, passing
+// each name/value pair to a reviver function for possible transformation.
+
+                return typeof reviver === 'function'
+                    ? walk({'': j}, '')
+                    : j;
+            }
+
+// If the text is not JSON parseable, then a SyntaxError is thrown.
+
+            throw new SyntaxError('JSON.parse');
+        };
+    }
+}());