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/*
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* Copyright (C) 2009 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "JSONObject.h"
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#include "BooleanObject.h"
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#include "Error.h"
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#include "ExceptionHelpers.h"
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#include "JSArray.h"
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#include "LiteralParser.h"
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#include "PropertyNameArray.h"
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#include <wtf/MathExtras.h>
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namespace JSC {
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ASSERT_CLASS_FITS_IN_CELL(JSONObject);
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static JSValue JSC_HOST_CALL JSONProtoFuncParse(ExecState*, JSObject*, JSValue, const ArgList&);
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static JSValue JSC_HOST_CALL JSONProtoFuncStringify(ExecState*, JSObject*, JSValue, const ArgList&);
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}
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#include "JSONObject.lut.h"
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namespace JSC {
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// PropertyNameForFunctionCall objects must be on the stack, since the JSValue that they create is not marked.
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class PropertyNameForFunctionCall {
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public:
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PropertyNameForFunctionCall(const Identifier&);
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PropertyNameForFunctionCall(unsigned);
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JSValue value(ExecState*) const;
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private:
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const Identifier* m_identifier;
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unsigned m_number;
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mutable JSValue m_value;
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};
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class Stringifier : public Noncopyable {
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public:
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Stringifier(ExecState*, JSValue replacer, JSValue space);
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~Stringifier();
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JSValue stringify(JSValue);
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void markAggregate(MarkStack&);
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private:
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typedef UString StringBuilder;
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class Holder {
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public:
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Holder(JSObject*);
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JSObject* object() const { return m_object; }
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bool appendNextProperty(Stringifier&, StringBuilder&);
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private:
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JSObject* const m_object;
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const bool m_isArray;
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bool m_isJSArray;
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unsigned m_index;
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unsigned m_size;
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RefPtr<PropertyNameArrayData> m_propertyNames;
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};
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friend class Holder;
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static void appendQuotedString(StringBuilder&, const UString&);
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JSValue toJSON(JSValue, const PropertyNameForFunctionCall&);
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enum StringifyResult { StringifyFailed, StringifySucceeded, StringifyFailedDueToUndefinedValue };
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StringifyResult appendStringifiedValue(StringBuilder&, JSValue, JSObject* holder, const PropertyNameForFunctionCall&);
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bool willIndent() const;
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void indent();
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void unindent();
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void startNewLine(StringBuilder&) const;
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Stringifier* const m_nextStringifierToMark;
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ExecState* const m_exec;
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const JSValue m_replacer;
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bool m_usingArrayReplacer;
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PropertyNameArray m_arrayReplacerPropertyNames;
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CallType m_replacerCallType;
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CallData m_replacerCallData;
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const UString m_gap;
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HashSet<JSObject*> m_holderCycleDetector;
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Vector<Holder, 16> m_holderStack;
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UString m_repeatedGap;
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UString m_indent;
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};
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// ------------------------------ helper functions --------------------------------
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static inline JSValue unwrapBoxedPrimitive(ExecState* exec, JSValue value)
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{
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if (!value.isObject())
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return value;
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JSObject* object = asObject(value);
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if (object->inherits(&NumberObject::info))
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return jsNumber(exec, object->toNumber(exec));
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if (object->inherits(&StringObject::info))
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return jsString(exec, object->toString(exec));
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if (object->inherits(&BooleanObject::info))
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return object->toPrimitive(exec);
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return value;
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}
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static inline UString gap(ExecState* exec, JSValue space)
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{
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const int maxGapLength = 10;
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space = unwrapBoxedPrimitive(exec, space);
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// If the space value is a number, create a gap string with that number of spaces.
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double spaceCount;
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if (space.getNumber(spaceCount)) {
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int count;
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if (spaceCount > maxGapLength)
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count = maxGapLength;
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else if (!(spaceCount > 0))
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count = 0;
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else
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count = static_cast<int>(spaceCount);
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UChar spaces[maxGapLength];
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for (int i = 0; i < count; ++i)
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spaces[i] = ' ';
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return UString(spaces, count);
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}
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// If the space value is a string, use it as the gap string, otherwise use no gap string.
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UString spaces = space.getString();
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if (spaces.size() > maxGapLength) {
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spaces = spaces.substr(0, maxGapLength);
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}
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return spaces;
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}
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// ------------------------------ PropertyNameForFunctionCall --------------------------------
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inline PropertyNameForFunctionCall::PropertyNameForFunctionCall(const Identifier& identifier)
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: m_identifier(&identifier)
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{
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}
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inline PropertyNameForFunctionCall::PropertyNameForFunctionCall(unsigned number)
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: m_identifier(0)
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, m_number(number)
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{
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}
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JSValue PropertyNameForFunctionCall::value(ExecState* exec) const
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{
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if (!m_value) {
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if (m_identifier)
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m_value = jsString(exec, m_identifier->ustring());
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else
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m_value = jsNumber(exec, m_number);
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}
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return m_value;
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}
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// ------------------------------ Stringifier --------------------------------
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Stringifier::Stringifier(ExecState* exec, JSValue replacer, JSValue space)
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: m_nextStringifierToMark(exec->globalData().firstStringifierToMark)
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, m_exec(exec)
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, m_replacer(replacer)
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, m_usingArrayReplacer(false)
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, m_arrayReplacerPropertyNames(exec)
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, m_replacerCallType(CallTypeNone)
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, m_gap(gap(exec, space))
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{
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exec->globalData().firstStringifierToMark = this;
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if (!m_replacer.isObject())
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return;
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if (asObject(m_replacer)->inherits(&JSArray::info)) {
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m_usingArrayReplacer = true;
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JSObject* array = asObject(m_replacer);
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unsigned length = array->get(exec, exec->globalData().propertyNames->length).toUInt32(exec);
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for (unsigned i = 0; i < length; ++i) {
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JSValue name = array->get(exec, i);
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if (exec->hadException())
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break;
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UString propertyName;
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if (name.getString(propertyName)) {
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m_arrayReplacerPropertyNames.add(Identifier(exec, propertyName));
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continue;
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}
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double value = 0;
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if (name.getNumber(value)) {
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m_arrayReplacerPropertyNames.add(Identifier::from(exec, value));
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continue;
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}
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if (name.isObject()) {
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if (!asObject(name)->inherits(&NumberObject::info) && !asObject(name)->inherits(&StringObject::info))
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continue;
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propertyName = name.toString(exec);
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if (exec->hadException())
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break;
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m_arrayReplacerPropertyNames.add(Identifier(exec, propertyName));
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}
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}
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return;
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}
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m_replacerCallType = asObject(m_replacer)->getCallData(m_replacerCallData);
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}
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Stringifier::~Stringifier()
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{
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ASSERT(m_exec->globalData().firstStringifierToMark == this);
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m_exec->globalData().firstStringifierToMark = m_nextStringifierToMark;
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}
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void Stringifier::markAggregate(MarkStack& markStack)
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{
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for (Stringifier* stringifier = this; stringifier; stringifier = stringifier->m_nextStringifierToMark) {
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size_t size = m_holderStack.size();
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for (size_t i = 0; i < size; ++i)
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markStack.append(m_holderStack[i].object());
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}
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}
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JSValue Stringifier::stringify(JSValue value)
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{
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JSObject* object = constructEmptyObject(m_exec);
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if (m_exec->hadException())
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return jsNull();
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PropertyNameForFunctionCall emptyPropertyName(m_exec->globalData().propertyNames->emptyIdentifier);
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object->putDirect(m_exec->globalData().propertyNames->emptyIdentifier, value);
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StringBuilder result;
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if (appendStringifiedValue(result, value, object, emptyPropertyName) != StringifySucceeded)
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return jsUndefined();
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if (m_exec->hadException())
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return jsNull();
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return jsString(m_exec, result);
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}
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void Stringifier::appendQuotedString(StringBuilder& builder, const UString& value)
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{
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int length = value.size();
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// String length plus 2 for quote marks plus 8 so we can accomodate a few escaped characters.
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builder.reserveCapacity(builder.size() + length + 2 + 8);
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builder.append('"');
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const UChar* data = value.data();
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for (int i = 0; i < length; ++i) {
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int start = i;
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while (i < length && (data[i] > 0x1F && data[i] != '"' && data[i] != '\\'))
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++i;
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builder.append(data + start, i - start);
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if (i >= length)
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break;
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switch (data[i]) {
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case '\t':
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builder.append('\\');
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builder.append('t');
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break;
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case '\r':
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builder.append('\\');
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builder.append('r');
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break;
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case '\n':
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builder.append('\\');
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builder.append('n');
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break;
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case '\f':
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builder.append('\\');
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builder.append('f');
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break;
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case '\b':
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builder.append('\\');
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builder.append('b');
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break;
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case '"':
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builder.append('\\');
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builder.append('"');
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break;
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case '\\':
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builder.append('\\');
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builder.append('\\');
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break;
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default:
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static const char hexDigits[] = "0123456789abcdef";
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UChar ch = data[i];
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UChar hex[] = { '\\', 'u', hexDigits[(ch >> 12) & 0xF], hexDigits[(ch >> 8) & 0xF], hexDigits[(ch >> 4) & 0xF], hexDigits[ch & 0xF] };
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builder.append(hex, sizeof(hex) / sizeof(UChar));
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break;
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}
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}
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builder.append('"');
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}
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inline JSValue Stringifier::toJSON(JSValue value, const PropertyNameForFunctionCall& propertyName)
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{
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ASSERT(!m_exec->hadException());
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if (!value.isObject() || !asObject(value)->hasProperty(m_exec, m_exec->globalData().propertyNames->toJSON))
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return value;
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JSValue toJSONFunction = asObject(value)->get(m_exec, m_exec->globalData().propertyNames->toJSON);
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if (m_exec->hadException())
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return jsNull();
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if (!toJSONFunction.isObject())
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return value;
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JSObject* object = asObject(toJSONFunction);
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CallData callData;
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CallType callType = object->getCallData(callData);
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if (callType == CallTypeNone)
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return value;
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JSValue list[] = { propertyName.value(m_exec) };
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ArgList args(list, sizeof(list) / sizeof(JSValue));
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return call(m_exec, object, callType, callData, value, args);
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}
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Stringifier::StringifyResult Stringifier::appendStringifiedValue(StringBuilder& builder, JSValue value, JSObject* holder, const PropertyNameForFunctionCall& propertyName)
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{
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// Call the toJSON function.
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value = toJSON(value, propertyName);
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if (m_exec->hadException())
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return StringifyFailed;
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// Call the replacer function.
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if (m_replacerCallType != CallTypeNone) {
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JSValue list[] = { propertyName.value(m_exec), value };
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ArgList args(list, sizeof(list) / sizeof(JSValue));
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value = call(m_exec, m_replacer, m_replacerCallType, m_replacerCallData, holder, args);
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if (m_exec->hadException())
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return StringifyFailed;
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}
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if (value.isUndefined() && !holder->inherits(&JSArray::info))
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return StringifyFailedDueToUndefinedValue;
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if (value.isNull()) {
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builder.append("null");
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return StringifySucceeded;
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}
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value = unwrapBoxedPrimitive(m_exec, value);
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if (m_exec->hadException())
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return StringifyFailed;
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if (value.isBoolean()) {
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builder.append(value.getBoolean() ? "true" : "false");
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return StringifySucceeded;
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}
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UString stringValue;
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if (value.getString(stringValue)) {
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appendQuotedString(builder, stringValue);
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return StringifySucceeded;
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}
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double numericValue;
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if (value.getNumber(numericValue)) {
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if (!isfinite(numericValue))
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builder.append("null");
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else
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builder.append(UString::from(numericValue));
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return StringifySucceeded;
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}
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if (!value.isObject())
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return StringifyFailed;
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JSObject* object = asObject(value);
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CallData callData;
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if (object->getCallData(callData) != CallTypeNone) {
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if (holder->inherits(&JSArray::info)) {
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builder.append("null");
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return StringifySucceeded;
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}
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return StringifyFailedDueToUndefinedValue;
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}
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// Handle cycle detection, and put the holder on the stack.
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if (!m_holderCycleDetector.add(object).second) {
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throwError(m_exec, TypeError, "JSON.stringify cannot serialize cyclic structures.");
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return StringifyFailed;
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}
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bool holderStackWasEmpty = m_holderStack.isEmpty();
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m_holderStack.append(object);
|
|
427 |
if (!holderStackWasEmpty)
|
|
428 |
return StringifySucceeded;
|
|
429 |
|
|
430 |
// If this is the outermost call, then loop to handle everything on the holder stack.
|
|
431 |
TimeoutChecker localTimeoutChecker(m_exec->globalData().timeoutChecker);
|
|
432 |
localTimeoutChecker.reset();
|
|
433 |
unsigned tickCount = localTimeoutChecker.ticksUntilNextCheck();
|
|
434 |
do {
|
|
435 |
while (m_holderStack.last().appendNextProperty(*this, builder)) {
|
|
436 |
if (m_exec->hadException())
|
|
437 |
return StringifyFailed;
|
|
438 |
if (!--tickCount) {
|
|
439 |
if (localTimeoutChecker.didTimeOut(m_exec)) {
|
|
440 |
m_exec->setException(createInterruptedExecutionException(&m_exec->globalData()));
|
|
441 |
return StringifyFailed;
|
|
442 |
}
|
|
443 |
tickCount = localTimeoutChecker.ticksUntilNextCheck();
|
|
444 |
}
|
|
445 |
}
|
|
446 |
m_holderCycleDetector.remove(m_holderStack.last().object());
|
|
447 |
m_holderStack.removeLast();
|
|
448 |
} while (!m_holderStack.isEmpty());
|
|
449 |
return StringifySucceeded;
|
|
450 |
}
|
|
451 |
|
|
452 |
inline bool Stringifier::willIndent() const
|
|
453 |
{
|
|
454 |
return !m_gap.isEmpty();
|
|
455 |
}
|
|
456 |
|
|
457 |
inline void Stringifier::indent()
|
|
458 |
{
|
|
459 |
// Use a single shared string, m_repeatedGap, so we don't keep allocating new ones as we indent and unindent.
|
|
460 |
int newSize = m_indent.size() + m_gap.size();
|
|
461 |
if (newSize > m_repeatedGap.size())
|
|
462 |
m_repeatedGap.append(m_gap);
|
|
463 |
ASSERT(newSize <= m_repeatedGap.size());
|
|
464 |
m_indent = m_repeatedGap.substr(0, newSize);
|
|
465 |
}
|
|
466 |
|
|
467 |
inline void Stringifier::unindent()
|
|
468 |
{
|
|
469 |
ASSERT(m_indent.size() >= m_gap.size());
|
|
470 |
m_indent = m_repeatedGap.substr(0, m_indent.size() - m_gap.size());
|
|
471 |
}
|
|
472 |
|
|
473 |
inline void Stringifier::startNewLine(StringBuilder& builder) const
|
|
474 |
{
|
|
475 |
if (m_gap.isEmpty())
|
|
476 |
return;
|
|
477 |
builder.append('\n');
|
|
478 |
builder.append(m_indent);
|
|
479 |
}
|
|
480 |
|
|
481 |
inline Stringifier::Holder::Holder(JSObject* object)
|
|
482 |
: m_object(object)
|
|
483 |
, m_isArray(object->inherits(&JSArray::info))
|
|
484 |
, m_index(0)
|
|
485 |
{
|
|
486 |
}
|
|
487 |
|
|
488 |
bool Stringifier::Holder::appendNextProperty(Stringifier& stringifier, StringBuilder& builder)
|
|
489 |
{
|
|
490 |
ASSERT(m_index <= m_size);
|
|
491 |
|
|
492 |
ExecState* exec = stringifier.m_exec;
|
|
493 |
|
|
494 |
// First time through, initialize.
|
|
495 |
if (!m_index) {
|
|
496 |
if (m_isArray) {
|
|
497 |
m_isJSArray = isJSArray(&exec->globalData(), m_object);
|
|
498 |
m_size = m_object->get(exec, exec->globalData().propertyNames->length).toUInt32(exec);
|
|
499 |
builder.append('[');
|
|
500 |
} else {
|
|
501 |
if (stringifier.m_usingArrayReplacer)
|
|
502 |
m_propertyNames = stringifier.m_arrayReplacerPropertyNames.data();
|
|
503 |
else {
|
|
504 |
PropertyNameArray objectPropertyNames(exec);
|
|
505 |
m_object->getPropertyNames(exec, objectPropertyNames);
|
|
506 |
m_propertyNames = objectPropertyNames.releaseData();
|
|
507 |
}
|
|
508 |
m_size = m_propertyNames->propertyNameVector().size();
|
|
509 |
builder.append('{');
|
|
510 |
}
|
|
511 |
stringifier.indent();
|
|
512 |
}
|
|
513 |
|
|
514 |
// Last time through, finish up and return false.
|
|
515 |
if (m_index == m_size) {
|
|
516 |
stringifier.unindent();
|
|
517 |
if (m_size && builder[builder.size() - 1] != '{')
|
|
518 |
stringifier.startNewLine(builder);
|
|
519 |
builder.append(m_isArray ? ']' : '}');
|
|
520 |
return false;
|
|
521 |
}
|
|
522 |
|
|
523 |
// Handle a single element of the array or object.
|
|
524 |
unsigned index = m_index++;
|
|
525 |
unsigned rollBackPoint = 0;
|
|
526 |
StringifyResult stringifyResult;
|
|
527 |
if (m_isArray) {
|
|
528 |
// Get the value.
|
|
529 |
JSValue value;
|
|
530 |
if (m_isJSArray && asArray(m_object)->canGetIndex(index))
|
|
531 |
value = asArray(m_object)->getIndex(index);
|
|
532 |
else {
|
|
533 |
PropertySlot slot(m_object);
|
|
534 |
if (!m_object->getOwnPropertySlot(exec, index, slot))
|
|
535 |
slot.setUndefined();
|
|
536 |
if (exec->hadException())
|
|
537 |
return false;
|
|
538 |
value = slot.getValue(exec, index);
|
|
539 |
}
|
|
540 |
|
|
541 |
// Append the separator string.
|
|
542 |
if (index)
|
|
543 |
builder.append(',');
|
|
544 |
stringifier.startNewLine(builder);
|
|
545 |
|
|
546 |
// Append the stringified value.
|
|
547 |
stringifyResult = stringifier.appendStringifiedValue(builder, value, m_object, index);
|
|
548 |
} else {
|
|
549 |
// Get the value.
|
|
550 |
PropertySlot slot(m_object);
|
|
551 |
Identifier& propertyName = m_propertyNames->propertyNameVector()[index];
|
|
552 |
if (!m_object->getOwnPropertySlot(exec, propertyName, slot))
|
|
553 |
return true;
|
|
554 |
JSValue value = slot.getValue(exec, propertyName);
|
|
555 |
if (exec->hadException())
|
|
556 |
return false;
|
|
557 |
|
|
558 |
rollBackPoint = builder.size();
|
|
559 |
|
|
560 |
// Append the separator string.
|
|
561 |
if (builder[rollBackPoint - 1] != '{')
|
|
562 |
builder.append(',');
|
|
563 |
stringifier.startNewLine(builder);
|
|
564 |
|
|
565 |
// Append the property name.
|
|
566 |
appendQuotedString(builder, propertyName.ustring());
|
|
567 |
builder.append(':');
|
|
568 |
if (stringifier.willIndent())
|
|
569 |
builder.append(' ');
|
|
570 |
|
|
571 |
// Append the stringified value.
|
|
572 |
stringifyResult = stringifier.appendStringifiedValue(builder, value, m_object, propertyName);
|
|
573 |
}
|
|
574 |
|
|
575 |
// From this point on, no access to the this pointer or to any members, because the
|
|
576 |
// Holder object may have moved if the call to stringify pushed a new Holder onto
|
|
577 |
// m_holderStack.
|
|
578 |
|
|
579 |
switch (stringifyResult) {
|
|
580 |
case StringifyFailed:
|
|
581 |
builder.append("null");
|
|
582 |
break;
|
|
583 |
case StringifySucceeded:
|
|
584 |
break;
|
|
585 |
case StringifyFailedDueToUndefinedValue:
|
|
586 |
// This only occurs when get an undefined value for an object property.
|
|
587 |
// In this case we don't want the separator and property name that we
|
|
588 |
// already appended, so roll back.
|
|
589 |
builder = builder.substr(0, rollBackPoint);
|
|
590 |
break;
|
|
591 |
}
|
|
592 |
|
|
593 |
return true;
|
|
594 |
}
|
|
595 |
|
|
596 |
// ------------------------------ JSONObject --------------------------------
|
|
597 |
|
|
598 |
const ClassInfo JSONObject::info = { "JSON", 0, 0, ExecState::jsonTable };
|
|
599 |
|
|
600 |
/* Source for JSONObject.lut.h
|
|
601 |
@begin jsonTable
|
|
602 |
parse JSONProtoFuncParse DontEnum|Function 1
|
|
603 |
stringify JSONProtoFuncStringify DontEnum|Function 1
|
|
604 |
@end
|
|
605 |
*/
|
|
606 |
|
|
607 |
// ECMA 15.8
|
|
608 |
|
|
609 |
bool JSONObject::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
|
|
610 |
{
|
|
611 |
return getStaticFunctionSlot<JSObject>(exec, ExecState::jsonTable(exec), this, propertyName, slot);
|
|
612 |
}
|
|
613 |
|
|
614 |
bool JSONObject::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
|
|
615 |
{
|
|
616 |
return getStaticFunctionDescriptor<JSObject>(exec, ExecState::jsonTable(exec), this, propertyName, descriptor);
|
|
617 |
}
|
|
618 |
|
|
619 |
void JSONObject::markStringifiers(MarkStack& markStack, Stringifier* stringifier)
|
|
620 |
{
|
|
621 |
stringifier->markAggregate(markStack);
|
|
622 |
}
|
|
623 |
|
|
624 |
class Walker {
|
|
625 |
public:
|
|
626 |
Walker(ExecState* exec, JSObject* function, CallType callType, CallData callData)
|
|
627 |
: m_exec(exec)
|
|
628 |
, m_function(function)
|
|
629 |
, m_callType(callType)
|
|
630 |
, m_callData(callData)
|
|
631 |
{
|
|
632 |
}
|
|
633 |
JSValue walk(JSValue unfiltered);
|
|
634 |
private:
|
|
635 |
JSValue callReviver(JSObject* thisObj, JSValue property, JSValue unfiltered)
|
|
636 |
{
|
|
637 |
JSValue args[] = { property, unfiltered };
|
|
638 |
ArgList argList(args, 2);
|
|
639 |
return call(m_exec, m_function, m_callType, m_callData, thisObj, argList);
|
|
640 |
}
|
|
641 |
|
|
642 |
friend class Holder;
|
|
643 |
|
|
644 |
ExecState* m_exec;
|
|
645 |
JSObject* m_function;
|
|
646 |
CallType m_callType;
|
|
647 |
CallData m_callData;
|
|
648 |
};
|
|
649 |
|
|
650 |
// We clamp recursion well beyond anything reasonable, but we also have a timeout check
|
|
651 |
// to guard against "infinite" execution by inserting arbitrarily large objects.
|
|
652 |
static const unsigned maximumFilterRecursion = 40000;
|
|
653 |
enum WalkerState { StateUnknown, ArrayStartState, ArrayStartVisitMember, ArrayEndVisitMember,
|
|
654 |
ObjectStartState, ObjectStartVisitMember, ObjectEndVisitMember };
|
|
655 |
NEVER_INLINE JSValue Walker::walk(JSValue unfiltered)
|
|
656 |
{
|
|
657 |
Vector<PropertyNameArray, 16> propertyStack;
|
|
658 |
Vector<uint32_t, 16> indexStack;
|
|
659 |
Vector<JSObject*, 16> objectStack;
|
|
660 |
Vector<JSArray*, 16> arrayStack;
|
|
661 |
|
|
662 |
Vector<WalkerState, 16> stateStack;
|
|
663 |
WalkerState state = StateUnknown;
|
|
664 |
JSValue inValue = unfiltered;
|
|
665 |
JSValue outValue = jsNull();
|
|
666 |
|
|
667 |
TimeoutChecker localTimeoutChecker(m_exec->globalData().timeoutChecker);
|
|
668 |
localTimeoutChecker.reset();
|
|
669 |
unsigned tickCount = localTimeoutChecker.ticksUntilNextCheck();
|
|
670 |
while (1) {
|
|
671 |
switch (state) {
|
|
672 |
arrayStartState:
|
|
673 |
case ArrayStartState: {
|
|
674 |
ASSERT(inValue.isObject());
|
|
675 |
ASSERT(isJSArray(&m_exec->globalData(), asObject(inValue)) || asObject(inValue)->inherits(&JSArray::info));
|
|
676 |
if (objectStack.size() + arrayStack.size() > maximumFilterRecursion) {
|
|
677 |
m_exec->setException(createStackOverflowError(m_exec));
|
|
678 |
return jsUndefined();
|
|
679 |
}
|
|
680 |
|
|
681 |
JSArray* array = asArray(inValue);
|
|
682 |
arrayStack.append(array);
|
|
683 |
indexStack.append(0);
|
|
684 |
// fallthrough
|
|
685 |
}
|
|
686 |
arrayStartVisitMember:
|
|
687 |
case ArrayStartVisitMember: {
|
|
688 |
if (!--tickCount) {
|
|
689 |
if (localTimeoutChecker.didTimeOut(m_exec)) {
|
|
690 |
m_exec->setException(createInterruptedExecutionException(&m_exec->globalData()));
|
|
691 |
return jsUndefined();
|
|
692 |
}
|
|
693 |
tickCount = localTimeoutChecker.ticksUntilNextCheck();
|
|
694 |
}
|
|
695 |
|
|
696 |
JSArray* array = arrayStack.last();
|
|
697 |
uint32_t index = indexStack.last();
|
|
698 |
if (index == array->length()) {
|
|
699 |
outValue = array;
|
|
700 |
arrayStack.removeLast();
|
|
701 |
indexStack.removeLast();
|
|
702 |
break;
|
|
703 |
}
|
|
704 |
if (isJSArray(&m_exec->globalData(), array) && array->canGetIndex(index))
|
|
705 |
inValue = array->getIndex(index);
|
|
706 |
else {
|
|
707 |
PropertySlot slot;
|
|
708 |
if (array->getOwnPropertySlot(m_exec, index, slot))
|
|
709 |
inValue = slot.getValue(m_exec, index);
|
|
710 |
else
|
|
711 |
inValue = jsUndefined();
|
|
712 |
}
|
|
713 |
|
|
714 |
if (inValue.isObject()) {
|
|
715 |
stateStack.append(ArrayEndVisitMember);
|
|
716 |
goto stateUnknown;
|
|
717 |
} else
|
|
718 |
outValue = inValue;
|
|
719 |
// fallthrough
|
|
720 |
}
|
|
721 |
case ArrayEndVisitMember: {
|
|
722 |
JSArray* array = arrayStack.last();
|
|
723 |
JSValue filteredValue = callReviver(array, jsString(m_exec, UString::from(indexStack.last())), outValue);
|
|
724 |
if (filteredValue.isUndefined())
|
|
725 |
array->deleteProperty(m_exec, indexStack.last());
|
|
726 |
else {
|
|
727 |
if (isJSArray(&m_exec->globalData(), array) && array->canSetIndex(indexStack.last()))
|
|
728 |
array->setIndex(indexStack.last(), filteredValue);
|
|
729 |
else
|
|
730 |
array->put(m_exec, indexStack.last(), filteredValue);
|
|
731 |
}
|
|
732 |
if (m_exec->hadException())
|
|
733 |
return jsNull();
|
|
734 |
indexStack.last()++;
|
|
735 |
goto arrayStartVisitMember;
|
|
736 |
}
|
|
737 |
objectStartState:
|
|
738 |
case ObjectStartState: {
|
|
739 |
ASSERT(inValue.isObject());
|
|
740 |
ASSERT(!isJSArray(&m_exec->globalData(), asObject(inValue)) && !asObject(inValue)->inherits(&JSArray::info));
|
|
741 |
if (objectStack.size() + arrayStack.size() > maximumFilterRecursion) {
|
|
742 |
m_exec->setException(createStackOverflowError(m_exec));
|
|
743 |
return jsUndefined();
|
|
744 |
}
|
|
745 |
|
|
746 |
JSObject* object = asObject(inValue);
|
|
747 |
objectStack.append(object);
|
|
748 |
indexStack.append(0);
|
|
749 |
propertyStack.append(PropertyNameArray(m_exec));
|
|
750 |
object->getPropertyNames(m_exec, propertyStack.last());
|
|
751 |
// fallthrough
|
|
752 |
}
|
|
753 |
objectStartVisitMember:
|
|
754 |
case ObjectStartVisitMember: {
|
|
755 |
if (!--tickCount) {
|
|
756 |
if (localTimeoutChecker.didTimeOut(m_exec)) {
|
|
757 |
m_exec->setException(createInterruptedExecutionException(&m_exec->globalData()));
|
|
758 |
return jsUndefined();
|
|
759 |
}
|
|
760 |
tickCount = localTimeoutChecker.ticksUntilNextCheck();
|
|
761 |
}
|
|
762 |
|
|
763 |
JSObject* object = objectStack.last();
|
|
764 |
uint32_t index = indexStack.last();
|
|
765 |
PropertyNameArray& properties = propertyStack.last();
|
|
766 |
if (index == properties.size()) {
|
|
767 |
outValue = object;
|
|
768 |
objectStack.removeLast();
|
|
769 |
indexStack.removeLast();
|
|
770 |
propertyStack.removeLast();
|
|
771 |
break;
|
|
772 |
}
|
|
773 |
PropertySlot slot;
|
|
774 |
if (object->getOwnPropertySlot(m_exec, properties[index], slot))
|
|
775 |
inValue = slot.getValue(m_exec, properties[index]);
|
|
776 |
else
|
|
777 |
inValue = jsUndefined();
|
|
778 |
|
|
779 |
// The holder may be modified by the reviver function so any lookup may throw
|
|
780 |
if (m_exec->hadException())
|
|
781 |
return jsNull();
|
|
782 |
|
|
783 |
if (inValue.isObject()) {
|
|
784 |
stateStack.append(ObjectEndVisitMember);
|
|
785 |
goto stateUnknown;
|
|
786 |
} else
|
|
787 |
outValue = inValue;
|
|
788 |
// fallthrough
|
|
789 |
}
|
|
790 |
case ObjectEndVisitMember: {
|
|
791 |
JSObject* object = objectStack.last();
|
|
792 |
Identifier prop = propertyStack.last()[indexStack.last()];
|
|
793 |
PutPropertySlot slot;
|
|
794 |
JSValue filteredValue = callReviver(object, jsString(m_exec, prop.ustring()), outValue);
|
|
795 |
if (filteredValue.isUndefined())
|
|
796 |
object->deleteProperty(m_exec, prop);
|
|
797 |
else
|
|
798 |
object->put(m_exec, prop, filteredValue, slot);
|
|
799 |
if (m_exec->hadException())
|
|
800 |
return jsNull();
|
|
801 |
indexStack.last()++;
|
|
802 |
goto objectStartVisitMember;
|
|
803 |
}
|
|
804 |
stateUnknown:
|
|
805 |
case StateUnknown:
|
|
806 |
if (!inValue.isObject()) {
|
|
807 |
outValue = inValue;
|
|
808 |
break;
|
|
809 |
}
|
|
810 |
JSObject* object = asObject(inValue);
|
|
811 |
if (isJSArray(&m_exec->globalData(), object) || object->inherits(&JSArray::info))
|
|
812 |
goto arrayStartState;
|
|
813 |
goto objectStartState;
|
|
814 |
}
|
|
815 |
if (stateStack.isEmpty())
|
|
816 |
break;
|
|
817 |
|
|
818 |
state = stateStack.last();
|
|
819 |
stateStack.removeLast();
|
|
820 |
|
|
821 |
if (!--tickCount) {
|
|
822 |
if (localTimeoutChecker.didTimeOut(m_exec)) {
|
|
823 |
m_exec->setException(createInterruptedExecutionException(&m_exec->globalData()));
|
|
824 |
return jsUndefined();
|
|
825 |
}
|
|
826 |
tickCount = localTimeoutChecker.ticksUntilNextCheck();
|
|
827 |
}
|
|
828 |
}
|
|
829 |
JSObject* finalHolder = constructEmptyObject(m_exec);
|
|
830 |
PutPropertySlot slot;
|
|
831 |
finalHolder->put(m_exec, m_exec->globalData().propertyNames->emptyIdentifier, outValue, slot);
|
|
832 |
return callReviver(finalHolder, jsEmptyString(m_exec), outValue);
|
|
833 |
}
|
|
834 |
|
|
835 |
// ECMA-262 v5 15.12.2
|
|
836 |
JSValue JSC_HOST_CALL JSONProtoFuncParse(ExecState* exec, JSObject*, JSValue, const ArgList& args)
|
|
837 |
{
|
|
838 |
if (args.isEmpty())
|
|
839 |
return throwError(exec, GeneralError, "JSON.parse requires at least one parameter");
|
|
840 |
JSValue value = args.at(0);
|
|
841 |
UString source = value.toString(exec);
|
|
842 |
if (exec->hadException())
|
|
843 |
return jsNull();
|
|
844 |
|
|
845 |
LiteralParser jsonParser(exec, source, LiteralParser::StrictJSON);
|
|
846 |
JSValue unfiltered = jsonParser.tryLiteralParse();
|
|
847 |
if (!unfiltered)
|
|
848 |
return throwError(exec, SyntaxError, "Unable to parse JSON string");
|
|
849 |
|
|
850 |
if (args.size() < 2)
|
|
851 |
return unfiltered;
|
|
852 |
|
|
853 |
JSValue function = args.at(1);
|
|
854 |
CallData callData;
|
|
855 |
CallType callType = function.getCallData(callData);
|
|
856 |
if (callType == CallTypeNone)
|
|
857 |
return unfiltered;
|
|
858 |
return Walker(exec, asObject(function), callType, callData).walk(unfiltered);
|
|
859 |
}
|
|
860 |
|
|
861 |
// ECMA-262 v5 15.12.3
|
|
862 |
JSValue JSC_HOST_CALL JSONProtoFuncStringify(ExecState* exec, JSObject*, JSValue, const ArgList& args)
|
|
863 |
{
|
|
864 |
if (args.isEmpty())
|
|
865 |
return throwError(exec, GeneralError, "No input to stringify");
|
|
866 |
JSValue value = args.at(0);
|
|
867 |
JSValue replacer = args.at(1);
|
|
868 |
JSValue space = args.at(2);
|
|
869 |
return Stringifier(exec, replacer, space).stringify(value);
|
|
870 |
}
|
|
871 |
|
|
872 |
} // namespace JSC
|