| // 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. |
| |
| (function(global, utils) { |
| |
| "use strict"; |
| |
| %CheckIsBootstrapping(); |
| |
| // ------------------------------------------------------------------- |
| // Imports |
| |
| var GlobalDate = global.Date; |
| var GlobalJSON = global.JSON; |
| var GlobalSet = global.Set; |
| var InternalArray = utils.InternalArray; |
| var MakeTypeError; |
| var MaxSimple; |
| var MinSimple; |
| var ObjectHasOwnProperty; |
| var Stack; |
| var StackHas; |
| var StackPop; |
| var StackPush; |
| var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol"); |
| |
| utils.Import(function(from) { |
| MakeTypeError = from.MakeTypeError; |
| MaxSimple = from.MaxSimple; |
| MinSimple = from.MinSimple; |
| ObjectHasOwnProperty = from.ObjectHasOwnProperty; |
| Stack = from.Stack; |
| StackHas = from.StackHas; |
| StackPop = from.StackPop; |
| StackPush = from.StackPush; |
| }); |
| |
| // ------------------------------------------------------------------- |
| |
| function CreateDataProperty(o, p, v) { |
| var desc = {value: v, enumerable: true, writable: true, configurable: true}; |
| return %reflect_define_property(o, p, desc); |
| } |
| |
| |
| function InternalizeJSONProperty(holder, name, reviver) { |
| var val = holder[name]; |
| if (IS_RECEIVER(val)) { |
| if (%is_arraylike(val)) { |
| var length = TO_LENGTH(val.length); |
| for (var i = 0; i < length; i++) { |
| var newElement = |
| InternalizeJSONProperty(val, %_NumberToString(i), reviver); |
| if (IS_UNDEFINED(newElement)) { |
| %reflect_delete_property(val, i); |
| } else { |
| CreateDataProperty(val, i, newElement); |
| } |
| } |
| } else { |
| var keys = %object_keys(val); |
| for (var i = 0; i < keys.length; i++) { |
| var p = keys[i]; |
| var newElement = InternalizeJSONProperty(val, p, reviver); |
| if (IS_UNDEFINED(newElement)) { |
| %reflect_delete_property(val, p); |
| } else { |
| CreateDataProperty(val, p, newElement); |
| } |
| } |
| } |
| } |
| return %_Call(reviver, holder, name, val); |
| } |
| |
| |
| function JSONParse(text, reviver) { |
| var unfiltered = %ParseJson(text); |
| if (IS_CALLABLE(reviver)) { |
| return InternalizeJSONProperty({'': unfiltered}, '', reviver); |
| } else { |
| return unfiltered; |
| } |
| } |
| |
| |
| function SerializeArray(value, replacer, stack, indent, gap) { |
| if (StackHas(stack, value)) throw MakeTypeError(kCircularStructure); |
| StackPush(stack, value); |
| var stepback = indent; |
| indent += gap; |
| var partial = new InternalArray(); |
| var len = TO_LENGTH(value.length); |
| for (var i = 0; i < len; i++) { |
| 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 = "[]"; |
| } |
| StackPop(stack); |
| return final; |
| } |
| |
| |
| function SerializeObject(value, replacer, stack, indent, gap) { |
| if (StackHas(stack, value)) throw MakeTypeError(kCircularStructure); |
| StackPush(stack, value); |
| var stepback = indent; |
| indent += gap; |
| var partial = new InternalArray(); |
| if (IS_ARRAY(replacer)) { |
| var length = replacer.length; |
| for (var i = 0; i < length; i++) { |
| 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 { |
| var keys = %object_keys(value); |
| for (var i = 0; i < keys.length; i++) { |
| var p = keys[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); |
| } |
| } |
| } |
| 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 = "{}"; |
| } |
| StackPop(stack); |
| return final; |
| } |
| |
| |
| function JSONSerialize(key, holder, replacer, stack, indent, gap) { |
| var value = holder[key]; |
| if (IS_RECEIVER(value)) { |
| var toJSON = value.toJSON; |
| if (IS_CALLABLE(toJSON)) { |
| value = %_Call(toJSON, value, key); |
| } |
| } |
| if (IS_CALLABLE(replacer)) { |
| value = %_Call(replacer, holder, key, value); |
| } |
| 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_RECEIVER(value) && !IS_CALLABLE(value)) { |
| // Non-callable object. If it's a primitive wrapper, it must be unwrapped. |
| if (%is_arraylike(value)) { |
| return SerializeArray(value, replacer, stack, indent, gap); |
| } else if (IS_NUMBER_WRAPPER(value)) { |
| value = TO_NUMBER(value); |
| return JSON_NUMBER_TO_STRING(value); |
| } else if (IS_STRING_WRAPPER(value)) { |
| return %QuoteJSONString(TO_STRING(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 (arguments.length === 1 && !IS_PROXY(value)) { |
| return %BasicJSONStringify(value); |
| } |
| if (!IS_CALLABLE(replacer) && %is_arraylike(replacer)) { |
| var property_list = new InternalArray(); |
| var seen_properties = new GlobalSet(); |
| var length = TO_LENGTH(replacer.length); |
| for (var i = 0; i < length; i++) { |
| var v = replacer[i]; |
| var item; |
| if (IS_STRING(v)) { |
| item = v; |
| } else if (IS_NUMBER(v)) { |
| item = %_NumberToString(v); |
| } else if (IS_STRING_WRAPPER(v) || IS_NUMBER_WRAPPER(v)) { |
| item = TO_STRING(v); |
| } else { |
| continue; |
| } |
| if (!seen_properties.has(item)) { |
| property_list.push(item); |
| seen_properties.add(item); |
| } |
| } |
| replacer = property_list; |
| } |
| if (IS_OBJECT(space)) { |
| // Unwrap 'space' if it is wrapped |
| if (IS_NUMBER_WRAPPER(space)) { |
| space = TO_NUMBER(space); |
| } else if (IS_STRING_WRAPPER(space)) { |
| space = TO_STRING(space); |
| } |
| } |
| var gap; |
| if (IS_NUMBER(space)) { |
| space = MaxSimple(0, MinSimple(TO_INTEGER(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_CALLABLE(replacer) && !property_list && !gap && !IS_PROXY(value)) { |
| return %BasicJSONStringify(value); |
| } |
| return JSONSerialize('', {'': value}, replacer, new Stack(), "", gap); |
| } |
| |
| // ------------------------------------------------------------------- |
| |
| %AddNamedProperty(GlobalJSON, toStringTagSymbol, "JSON", READ_ONLY | DONT_ENUM); |
| |
| // Set up non-enumerable properties of the JSON object. |
| utils.InstallFunctions(GlobalJSON, DONT_ENUM, [ |
| "parse", JSONParse, |
| "stringify", JSONStringify |
| ]); |
| |
| // ------------------------------------------------------------------- |
| // Date.toJSON |
| |
| // 20.3.4.37 Date.prototype.toJSON ( key ) |
| function DateToJSON(key) { |
| var o = TO_OBJECT(this); |
| var tv = TO_PRIMITIVE_NUMBER(o); |
| if (IS_NUMBER(tv) && !NUMBER_IS_FINITE(tv)) { |
| return null; |
| } |
| return o.toISOString(); |
| } |
| |
| // Set up non-enumerable functions of the Date prototype object. |
| utils.InstallFunctions(GlobalDate.prototype, DONT_ENUM, [ |
| "toJSON", DateToJSON |
| ]); |
| |
| // ------------------------------------------------------------------- |
| // 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 Stack(), "", ""); |
| } |
| |
| %InstallToContext(["json_serialize_adapter", JsonSerializeAdapter]); |
| |
| }) |