Wrap JSON and generator implementation in functions.

src/json.js

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+var $jsonSerializeAdapter;
+
+(function() {
+
 "use strict";
 
-// This file relies on the fact that the following declarations have been made
-// in runtime.js:
-// var $Array = global.Array;
-// var $String = global.String;
+%CheckIsBootstrapping();
 
-var $JSON = global.JSON;
+var GlobalJSON = global.JSON;
 
 // -------------------------------------------------------------------
 
 function Revive(holder, name, reviver) {
   var val = holder[name];
   if (IS_OBJECT(val)) {
     if (IS_ARRAY(val)) {
       var length = val.length;
       for (var i = 0; i < length; i++) {
-        var newElement = Revive(val, $String(i), reviver);
+        var newElement = Revive(val, %_NumberToString(i), reviver);
         val[i] = newElement;
       }
     } else {
       for (var p in val) {
         if (%_CallFunction(val, p, ObjectHasOwnProperty)) {
           var newElement = Revive(val, p, reviver);
           if (IS_UNDEFINED(newElement)) {
             delete val[p];
           } else {
             val[p] = newElement;
           }
         }
       }
     }
   }
   return %_CallFunction(holder, name, val, reviver);
 }
 
+
 function JSONParse(text, reviver) {
   var unfiltered = %ParseJson(TO_STRING_INLINE(text));
   if (IS_SPEC_FUNCTION(reviver)) {
     return Revive({'': unfiltered}, '', reviver);
   } else {
     return unfiltered;
   }
 }
 
+
 function SerializeArray(value, replacer, stack, indent, gap) {
   if (!%PushIfAbsent(stack, value)) {
     throw MakeTypeError('circular_structure', []);
   }
   var stepback = indent;
   indent += gap;
   var partial = new InternalArray();
   var len = value.length;
   for (var i = 0; i < len; i++) {
-    var strP = JSONSerialize($String(i), value, replacer, stack,
+    var strP = JSONSerialize(%_NumberToString(i), value, replacer, stack,
                              indent, gap);
     if (IS_UNDEFINED(strP)) {
       strP = "null";
     }
     partial.push(strP);
   }
   var final;
   if (gap == "") {
     final = "[" + partial.join(",") + "]";
   } else if (partial.length > 0) {
     var separator = ",\n" + indent;
     final = "[\n" + indent + partial.join(separator) + "\n" +
         stepback + "]";
   } else {
     final = "[]";
   }
   stack.pop();
   return final;
 }
 
+
 function SerializeObject(value, replacer, stack, indent, gap) {
   if (!%PushIfAbsent(stack, value)) {
     throw MakeTypeError('circular_structure', []);
   }
   var stepback = indent;
   indent += gap;
   var partial = new InternalArray();
   if (IS_ARRAY(replacer)) {
     var length = replacer.length;
     for (var i = 0; i < length; i++) {
@@ skipping 28 matching lines @@
     var separator = ",\n" + indent;
     final = "{\n" + indent + partial.join(separator) + "\n" +
         stepback + "}";
   } else {
     final = "{}";
   }
   stack.pop();
   return final;
 }
 
+
 function JSONSerialize(key, holder, replacer, stack, indent, gap) {
   var value = holder[key];
   if (IS_SPEC_OBJECT(value)) {
     var toJSON = value.toJSON;
     if (IS_SPEC_FUNCTION(toJSON)) {
       value = %_CallFunction(value, key, toJSON);
     }
   }
   if (IS_SPEC_FUNCTION(replacer)) {
     value = %_CallFunction(holder, key, value, replacer);
@@ skipping 69 matching lines @@
         property_list.push(item);
         // We cannot use true here because __proto__ needs to be an object.
         seen_properties[item] = seen_sentinel;
       }
     }
     replacer = property_list;
   }
   return JSONSerialize('', {'': value}, replacer, new InternalArray(), "", gap);
 }
 
-
 // -------------------------------------------------------------------
 
-function SetUpJSON() {
-  %CheckIsBootstrapping();
+%AddNamedProperty(GlobalJSON, symbolToStringTag, "JSON", READ_ONLY | DONT_ENUM);
 
-  %AddNamedProperty($JSON, symbolToStringTag, "JSON", READ_ONLY | DONT_ENUM);
-
-  // Set up non-enumerable properties of the JSON object.
-  InstallFunctions($JSON, DONT_ENUM, [
-    "parse", JSONParse,
-    "stringify", JSONStringify
-  ]);
-}
-
-SetUpJSON();
-
+// Set up non-enumerable properties of the JSON object.
+InstallFunctions(GlobalJSON, DONT_ENUM, [
+  "parse", JSONParse,
+  "stringify", JSONStringify
+]);
 
 // -------------------------------------------------------------------
 // JSON Builtins
 
-function JSONSerializeAdapter(key, object) {
+$jsonSerializeAdapter = function(key, object) {
   var holder = {};
   holder[key] = object;
   // No need to pass the actual holder since there is no replacer function.
   return JSONSerialize(key, holder, UNDEFINED, new InternalArray(), "", "");
 }
+
+})();