| // 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. |
| |
| "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; |
| |
| var $JSON = 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); |
| 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', $Array()); |
| } |
| var stepback = indent; |
| indent += gap; |
| var partial = new InternalArray(); |
| var len = value.length; |
| for (var i = 0; i < len; i++) { |
| var strP = JSONSerialize($String(i), value, replacer, stack, |
| 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', $Array()); |
| } |
| var stepback = indent; |
| indent += gap; |
| var partial = new InternalArray(); |
| if (IS_ARRAY(replacer)) { |
| var length = replacer.length; |
| for (var i = 0; i < length; i++) { |
| if (%_CallFunction(replacer, i, ObjectHasOwnProperty)) { |
| var p = replacer[i]; |
| var strP = JSONSerialize(p, value, replacer, stack, indent, gap); |
| if (!IS_UNDEFINED(strP)) { |
| var member = %QuoteJSONString(p) + ":"; |
| if (gap != "") member += " "; |
| member += strP; |
| partial.push(member); |
| } |
| } |
| } |
| } else { |
| for (var p in value) { |
| if (%_CallFunction(value, p, ObjectHasOwnProperty)) { |
| var strP = JSONSerialize(p, value, replacer, stack, indent, gap); |
| if (!IS_UNDEFINED(strP)) { |
| var member = %QuoteJSONString(p) + ":"; |
| if (gap != "") member += " "; |
| member += strP; |
| partial.push(member); |
| } |
| } |
| } |
| } |
| 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 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); |
| } |
| if (IS_STRING(value)) { |
| return %QuoteJSONString(value); |
| } else if (IS_NUMBER(value)) { |
| return JSON_NUMBER_TO_STRING(value); |
| } else if (IS_BOOLEAN(value)) { |
| return value ? "true" : "false"; |
| } else if (IS_NULL(value)) { |
| return "null"; |
| } else if (IS_SPEC_OBJECT(value) && !(typeof value == "function")) { |
| // Non-callable object. If it's a primitive wrapper, it must be unwrapped. |
| if (IS_ARRAY(value)) { |
| return SerializeArray(value, replacer, stack, indent, gap); |
| } else if (IS_NUMBER_WRAPPER(value)) { |
| value = ToNumber(value); |
| return JSON_NUMBER_TO_STRING(value); |
| } else if (IS_STRING_WRAPPER(value)) { |
| return %QuoteJSONString(ToString(value)); |
| } else if (IS_BOOLEAN_WRAPPER(value)) { |
| return %_ValueOf(value) ? "true" : "false"; |
| } else { |
| return SerializeObject(value, replacer, stack, indent, gap); |
| } |
| } |
| // Undefined or a callable object. |
| return UNDEFINED; |
| } |
| |
| |
| function JSONStringify(value, replacer, space) { |
| if (%_ArgumentsLength() == 1) { |
| return %BasicJSONStringify(value); |
| } |
| if (IS_OBJECT(space)) { |
| // Unwrap 'space' if it is wrapped |
| if (IS_NUMBER_WRAPPER(space)) { |
| space = ToNumber(space); |
| } else if (IS_STRING_WRAPPER(space)) { |
| space = ToString(space); |
| } |
| } |
| var gap; |
| if (IS_NUMBER(space)) { |
| space = MathMax(0, MathMin(ToInteger(space), 10)); |
| gap = %_SubString(" ", 0, space); |
| } else if (IS_STRING(space)) { |
| if (space.length > 10) { |
| gap = %_SubString(space, 0, 10); |
| } else { |
| gap = space; |
| } |
| } else { |
| gap = ""; |
| } |
| if (IS_ARRAY(replacer)) { |
| // Deduplicate replacer array items. |
| var property_list = new InternalArray(); |
| var seen_properties = { __proto__: null }; |
| var seen_sentinel = {}; |
| var length = replacer.length; |
| for (var i = 0; i < length; i++) { |
| var item = replacer[i]; |
| if (IS_STRING_WRAPPER(item)) { |
| item = ToString(item); |
| } else { |
| if (IS_NUMBER_WRAPPER(item)) item = ToNumber(item); |
| if (IS_NUMBER(item)) item = %_NumberToString(item); |
| } |
| if (IS_STRING(item) && seen_properties[item] != seen_sentinel) { |
| 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(); |
| |
| // Set up non-enumerable properties of the JSON object. |
| InstallFunctions($JSON, DONT_ENUM, $Array( |
| "parse", JSONParse, |
| "stringify", JSONStringify |
| )); |
| } |
| |
| SetUpJSON(); |
| |
| |
| // ------------------------------------------------------------------- |
| // JSON Builtins |
| |
| function JSONSerializeAdapter(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(), "", ""); |
| } |