| /* |
| * Copyright (C) 2009 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "JSONObject.h" |
| |
| #include "BooleanObject.h" |
| #include "Error.h" |
| #include "ExceptionHelpers.h" |
| #include "JSArray.h" |
| #include "JSGlobalObject.h" |
| #include "LiteralParser.h" |
| #include "Local.h" |
| #include "LocalScope.h" |
| #include "Lookup.h" |
| #include "PropertyNameArray.h" |
| #include <wtf/MathExtras.h> |
| #include <wtf/text/StringBuilder.h> |
| |
| namespace JSC { |
| |
| ASSERT_HAS_TRIVIAL_DESTRUCTOR(JSONObject); |
| |
| static EncodedJSValue JSC_HOST_CALL JSONProtoFuncParse(ExecState*); |
| static EncodedJSValue JSC_HOST_CALL JSONProtoFuncStringify(ExecState*); |
| |
| } |
| |
| #include "JSONObject.lut.h" |
| |
| namespace JSC { |
| |
| JSONObject::JSONObject(JSGlobalObject* globalObject, Structure* structure) |
| : JSNonFinalObject(globalObject->globalData(), structure) |
| { |
| } |
| |
| void JSONObject::finishCreation(JSGlobalObject* globalObject) |
| { |
| Base::finishCreation(globalObject->globalData()); |
| ASSERT(inherits(&s_info)); |
| } |
| |
| // PropertyNameForFunctionCall objects must be on the stack, since the JSValue that they create is not marked. |
| class PropertyNameForFunctionCall { |
| public: |
| PropertyNameForFunctionCall(const Identifier&); |
| PropertyNameForFunctionCall(unsigned); |
| |
| JSValue value(ExecState*) const; |
| |
| private: |
| const Identifier* m_identifier; |
| unsigned m_number; |
| mutable JSValue m_value; |
| }; |
| |
| class Stringifier { |
| WTF_MAKE_NONCOPYABLE(Stringifier); |
| public: |
| Stringifier(ExecState*, const Local<Unknown>& replacer, const Local<Unknown>& space); |
| Local<Unknown> stringify(Handle<Unknown>); |
| |
| void visitAggregate(SlotVisitor&); |
| |
| private: |
| class Holder { |
| public: |
| Holder(JSGlobalData&, JSObject*); |
| |
| JSObject* object() const { return m_object.get(); } |
| |
| bool appendNextProperty(Stringifier&, StringBuilder&); |
| |
| private: |
| Local<JSObject> m_object; |
| const bool m_isArray; |
| bool m_isJSArray; |
| unsigned m_index; |
| unsigned m_size; |
| RefPtr<PropertyNameArrayData> m_propertyNames; |
| }; |
| |
| friend class Holder; |
| |
| static void appendQuotedString(StringBuilder&, const String&); |
| |
| JSValue toJSON(JSValue, const PropertyNameForFunctionCall&); |
| |
| enum StringifyResult { StringifyFailed, StringifySucceeded, StringifyFailedDueToUndefinedValue }; |
| StringifyResult appendStringifiedValue(StringBuilder&, JSValue, JSObject* holder, const PropertyNameForFunctionCall&); |
| |
| bool willIndent() const; |
| void indent(); |
| void unindent(); |
| void startNewLine(StringBuilder&) const; |
| |
| ExecState* const m_exec; |
| const Local<Unknown> m_replacer; |
| bool m_usingArrayReplacer; |
| PropertyNameArray m_arrayReplacerPropertyNames; |
| CallType m_replacerCallType; |
| CallData m_replacerCallData; |
| const String m_gap; |
| |
| Vector<Holder, 16> m_holderStack; |
| String m_repeatedGap; |
| String m_indent; |
| }; |
| |
| // ------------------------------ helper functions -------------------------------- |
| |
| static inline JSValue unwrapBoxedPrimitive(ExecState* exec, JSValue value) |
| { |
| if (!value.isObject()) |
| return value; |
| JSObject* object = asObject(value); |
| if (object->inherits(NumberObject::s_classinfo())) |
| return jsNumber(object->toNumber(exec)); |
| if (object->inherits(StringObject::s_classinfo())) |
| return object->toString(exec); |
| if (object->inherits(BooleanObject::s_classinfo())) |
| return object->toPrimitive(exec); |
| return value; |
| } |
| |
| static inline String gap(ExecState* exec, JSValue space) |
| { |
| const unsigned maxGapLength = 10; |
| space = unwrapBoxedPrimitive(exec, space); |
| |
| // If the space value is a number, create a gap string with that number of spaces. |
| if (space.isNumber()) { |
| double spaceCount = space.asNumber(); |
| int count; |
| if (spaceCount > maxGapLength) |
| count = maxGapLength; |
| else if (!(spaceCount > 0)) |
| count = 0; |
| else |
| count = static_cast<int>(spaceCount); |
| UChar spaces[maxGapLength]; |
| for (int i = 0; i < count; ++i) |
| spaces[i] = ' '; |
| return String(spaces, count); |
| } |
| |
| // If the space value is a string, use it as the gap string, otherwise use no gap string. |
| String spaces = space.getString(exec); |
| if (spaces.length() > maxGapLength) { |
| spaces = spaces.substringSharingImpl(0, maxGapLength); |
| } |
| return spaces; |
| } |
| |
| // ------------------------------ PropertyNameForFunctionCall -------------------------------- |
| |
| inline PropertyNameForFunctionCall::PropertyNameForFunctionCall(const Identifier& identifier) |
| : m_identifier(&identifier) |
| { |
| } |
| |
| inline PropertyNameForFunctionCall::PropertyNameForFunctionCall(unsigned number) |
| : m_identifier(0) |
| , m_number(number) |
| { |
| } |
| |
| JSValue PropertyNameForFunctionCall::value(ExecState* exec) const |
| { |
| if (!m_value) { |
| if (m_identifier) |
| m_value = jsString(exec, m_identifier->string()); |
| else |
| m_value = jsNumber(m_number); |
| } |
| return m_value; |
| } |
| |
| // ------------------------------ Stringifier -------------------------------- |
| |
| Stringifier::Stringifier(ExecState* exec, const Local<Unknown>& replacer, const Local<Unknown>& space) |
| : m_exec(exec) |
| , m_replacer(replacer) |
| , m_usingArrayReplacer(false) |
| , m_arrayReplacerPropertyNames(exec) |
| , m_replacerCallType(CallTypeNone) |
| , m_gap(gap(exec, space.get())) |
| { |
| if (!m_replacer.isObject()) |
| return; |
| |
| if (m_replacer.asObject()->inherits(JSArray::s_classinfo())) { |
| m_usingArrayReplacer = true; |
| Handle<JSObject> array = m_replacer.asObject(); |
| unsigned length = array->get(exec, exec->globalData().propertyNames->length).toUInt32(exec); |
| for (unsigned i = 0; i < length; ++i) { |
| JSValue name = array->get(exec, i); |
| if (exec->hadException()) |
| break; |
| |
| if (name.isObject()) { |
| if (!asObject(name)->inherits(NumberObject::s_classinfo()) && !asObject(name)->inherits(StringObject::s_classinfo())) |
| continue; |
| } |
| |
| m_arrayReplacerPropertyNames.add(Identifier(exec, name.toString(exec)->value(exec))); |
| } |
| return; |
| } |
| |
| m_replacerCallType = m_replacer.asObject()->methodTable()->getCallData(m_replacer.asObject().get(), m_replacerCallData); |
| } |
| |
| Local<Unknown> Stringifier::stringify(Handle<Unknown> value) |
| { |
| JSObject* object = constructEmptyObject(m_exec); |
| if (m_exec->hadException()) |
| return Local<Unknown>(m_exec->globalData(), jsNull()); |
| |
| PropertyNameForFunctionCall emptyPropertyName(m_exec->globalData().propertyNames->emptyIdentifier); |
| object->putDirect(m_exec->globalData(), m_exec->globalData().propertyNames->emptyIdentifier, value.get()); |
| |
| StringBuilder result; |
| if (appendStringifiedValue(result, value.get(), object, emptyPropertyName) != StringifySucceeded) |
| return Local<Unknown>(m_exec->globalData(), jsUndefined()); |
| if (m_exec->hadException()) |
| return Local<Unknown>(m_exec->globalData(), jsNull()); |
| |
| return Local<Unknown>(m_exec->globalData(), jsString(m_exec, result.toString())); |
| } |
| |
| template <typename CharType> |
| static void appendStringToStringBuilder(StringBuilder& builder, const CharType* data, int length) |
| { |
| for (int i = 0; i < length; ++i) { |
| int start = i; |
| while (i < length && (data[i] > 0x1F && data[i] != '"' && data[i] != '\\')) |
| ++i; |
| builder.append(data + start, i - start); |
| if (i >= length) |
| break; |
| switch (data[i]) { |
| case '\t': |
| builder.append('\\'); |
| builder.append('t'); |
| break; |
| case '\r': |
| builder.append('\\'); |
| builder.append('r'); |
| break; |
| case '\n': |
| builder.append('\\'); |
| builder.append('n'); |
| break; |
| case '\f': |
| builder.append('\\'); |
| builder.append('f'); |
| break; |
| case '\b': |
| builder.append('\\'); |
| builder.append('b'); |
| break; |
| case '"': |
| builder.append('\\'); |
| builder.append('"'); |
| break; |
| case '\\': |
| builder.append('\\'); |
| builder.append('\\'); |
| break; |
| default: |
| static const char hexDigits[] = "0123456789abcdef"; |
| UChar ch = data[i]; |
| LChar hex[] = { '\\', 'u', static_cast<LChar>(hexDigits[(ch >> 12) & 0xF]), static_cast<LChar>(hexDigits[(ch >> 8) & 0xF]), static_cast<LChar>(hexDigits[(ch >> 4) & 0xF]), static_cast<LChar>(hexDigits[ch & 0xF]) }; |
| builder.append(hex, WTF_ARRAY_LENGTH(hex)); |
| break; |
| } |
| } |
| } |
| |
| void Stringifier::appendQuotedString(StringBuilder& builder, const String& value) |
| { |
| int length = value.length(); |
| |
| builder.append('"'); |
| |
| if (value.is8Bit()) |
| appendStringToStringBuilder<LChar>(builder, value.characters8(), length); |
| else |
| appendStringToStringBuilder<UChar>(builder, value.characters16(), length); |
| |
| builder.append('"'); |
| } |
| |
| inline JSValue Stringifier::toJSON(JSValue value, const PropertyNameForFunctionCall& propertyName) |
| { |
| ASSERT(!m_exec->hadException()); |
| if (!value.isObject() || !asObject(value)->hasProperty(m_exec, m_exec->globalData().propertyNames->toJSON)) |
| return value; |
| |
| JSValue toJSONFunction = asObject(value)->get(m_exec, m_exec->globalData().propertyNames->toJSON); |
| if (m_exec->hadException()) |
| return jsNull(); |
| |
| if (!toJSONFunction.isObject()) |
| return value; |
| |
| JSObject* object = asObject(toJSONFunction); |
| CallData callData; |
| CallType callType = object->methodTable()->getCallData(object, callData); |
| if (callType == CallTypeNone) |
| return value; |
| |
| MarkedArgumentBuffer args; |
| args.append(propertyName.value(m_exec)); |
| return call(m_exec, object, callType, callData, value, args); |
| } |
| |
| Stringifier::StringifyResult Stringifier::appendStringifiedValue(StringBuilder& builder, JSValue value, JSObject* holder, const PropertyNameForFunctionCall& propertyName) |
| { |
| // Call the toJSON function. |
| value = toJSON(value, propertyName); |
| if (m_exec->hadException()) |
| return StringifyFailed; |
| |
| // Call the replacer function. |
| if (m_replacerCallType != CallTypeNone) { |
| MarkedArgumentBuffer args; |
| args.append(propertyName.value(m_exec)); |
| args.append(value); |
| value = call(m_exec, m_replacer.get(), m_replacerCallType, m_replacerCallData, holder, args); |
| if (m_exec->hadException()) |
| return StringifyFailed; |
| } |
| |
| if (value.isUndefined() && !holder->inherits(JSArray::s_classinfo())) |
| return StringifyFailedDueToUndefinedValue; |
| |
| if (value.isNull()) { |
| builder.appendLiteral("null"); |
| return StringifySucceeded; |
| } |
| |
| value = unwrapBoxedPrimitive(m_exec, value); |
| |
| if (m_exec->hadException()) |
| return StringifyFailed; |
| |
| if (value.isBoolean()) { |
| if (value.isTrue()) |
| builder.appendLiteral("true"); |
| else |
| builder.appendLiteral("false"); |
| return StringifySucceeded; |
| } |
| |
| String stringValue; |
| if (value.getString(m_exec, stringValue)) { |
| appendQuotedString(builder, stringValue); |
| return StringifySucceeded; |
| } |
| |
| if (value.isNumber()) { |
| double number = value.asNumber(); |
| if (!isfinite(number)) |
| builder.appendLiteral("null"); |
| else |
| builder.append(String::numberToStringECMAScript(number)); |
| return StringifySucceeded; |
| } |
| |
| if (!value.isObject()) |
| return StringifyFailed; |
| |
| JSObject* object = asObject(value); |
| |
| CallData callData; |
| if (object->methodTable()->getCallData(object, callData) != CallTypeNone) { |
| if (holder->inherits(JSArray::s_classinfo())) { |
| builder.appendLiteral("null"); |
| return StringifySucceeded; |
| } |
| return StringifyFailedDueToUndefinedValue; |
| } |
| |
| // Handle cycle detection, and put the holder on the stack. |
| for (unsigned i = 0; i < m_holderStack.size(); i++) { |
| if (m_holderStack[i].object() == object) { |
| throwError(m_exec, createTypeError(m_exec, ASCIILiteral("JSON.stringify cannot serialize cyclic structures."))); |
| return StringifyFailed; |
| } |
| } |
| bool holderStackWasEmpty = m_holderStack.isEmpty(); |
| m_holderStack.append(Holder(m_exec->globalData(), object)); |
| if (!holderStackWasEmpty) |
| return StringifySucceeded; |
| |
| // If this is the outermost call, then loop to handle everything on the holder stack. |
| TimeoutChecker localTimeoutChecker(m_exec->globalData().timeoutChecker); |
| localTimeoutChecker.reset(); |
| unsigned tickCount = localTimeoutChecker.ticksUntilNextCheck(); |
| do { |
| while (m_holderStack.last().appendNextProperty(*this, builder)) { |
| if (m_exec->hadException()) |
| return StringifyFailed; |
| if (!--tickCount) { |
| if (localTimeoutChecker.didTimeOut(m_exec)) { |
| throwError(m_exec, createInterruptedExecutionException(&m_exec->globalData())); |
| return StringifyFailed; |
| } |
| tickCount = localTimeoutChecker.ticksUntilNextCheck(); |
| } |
| } |
| m_holderStack.removeLast(); |
| } while (!m_holderStack.isEmpty()); |
| return StringifySucceeded; |
| } |
| |
| inline bool Stringifier::willIndent() const |
| { |
| return !m_gap.isEmpty(); |
| } |
| |
| inline void Stringifier::indent() |
| { |
| // Use a single shared string, m_repeatedGap, so we don't keep allocating new ones as we indent and unindent. |
| unsigned newSize = m_indent.length() + m_gap.length(); |
| if (newSize > m_repeatedGap.length()) |
| m_repeatedGap = makeString(m_repeatedGap, m_gap); |
| ASSERT(newSize <= m_repeatedGap.length()); |
| m_indent = m_repeatedGap.substringSharingImpl(0, newSize); |
| } |
| |
| inline void Stringifier::unindent() |
| { |
| ASSERT(m_indent.length() >= m_gap.length()); |
| m_indent = m_repeatedGap.substringSharingImpl(0, m_indent.length() - m_gap.length()); |
| } |
| |
| inline void Stringifier::startNewLine(StringBuilder& builder) const |
| { |
| if (m_gap.isEmpty()) |
| return; |
| builder.append('\n'); |
| builder.append(m_indent); |
| } |
| |
| inline Stringifier::Holder::Holder(JSGlobalData& globalData, JSObject* object) |
| : m_object(globalData, object) |
| , m_isArray(object->inherits(JSArray::s_classinfo())) |
| , m_index(0) |
| #ifndef NDEBUG |
| , m_size(0) |
| #endif |
| { |
| } |
| |
| bool Stringifier::Holder::appendNextProperty(Stringifier& stringifier, StringBuilder& builder) |
| { |
| ASSERT(m_index <= m_size); |
| |
| ExecState* exec = stringifier.m_exec; |
| |
| // First time through, initialize. |
| if (!m_index) { |
| if (m_isArray) { |
| m_isJSArray = isJSArray(m_object.get()); |
| m_size = m_object->get(exec, exec->globalData().propertyNames->length).toUInt32(exec); |
| builder.append('['); |
| } else { |
| if (stringifier.m_usingArrayReplacer) |
| m_propertyNames = stringifier.m_arrayReplacerPropertyNames.data(); |
| else { |
| PropertyNameArray objectPropertyNames(exec); |
| m_object->methodTable()->getOwnPropertyNames(m_object.get(), exec, objectPropertyNames, ExcludeDontEnumProperties); |
| m_propertyNames = objectPropertyNames.releaseData(); |
| } |
| m_size = m_propertyNames->propertyNameVector().size(); |
| builder.append('{'); |
| } |
| stringifier.indent(); |
| } |
| |
| // Last time through, finish up and return false. |
| if (m_index == m_size) { |
| stringifier.unindent(); |
| if (m_size && builder[builder.length() - 1] != '{') |
| stringifier.startNewLine(builder); |
| builder.append(m_isArray ? ']' : '}'); |
| return false; |
| } |
| |
| // Handle a single element of the array or object. |
| unsigned index = m_index++; |
| unsigned rollBackPoint = 0; |
| StringifyResult stringifyResult; |
| if (m_isArray) { |
| // Get the value. |
| JSValue value; |
| if (m_isJSArray && asArray(m_object.get())->canGetIndexQuickly(index)) |
| value = asArray(m_object.get())->getIndexQuickly(index); |
| else { |
| PropertySlot slot(m_object.get()); |
| if (!m_object->methodTable()->getOwnPropertySlotByIndex(m_object.get(), exec, index, slot)) |
| slot.setUndefined(); |
| if (exec->hadException()) |
| return false; |
| value = slot.getValue(exec, index); |
| } |
| |
| // Append the separator string. |
| if (index) |
| builder.append(','); |
| stringifier.startNewLine(builder); |
| |
| // Append the stringified value. |
| stringifyResult = stringifier.appendStringifiedValue(builder, value, m_object.get(), index); |
| } else { |
| // Get the value. |
| PropertySlot slot(m_object.get()); |
| Identifier& propertyName = m_propertyNames->propertyNameVector()[index]; |
| if (!m_object->methodTable()->getOwnPropertySlot(m_object.get(), exec, propertyName, slot)) |
| return true; |
| JSValue value = slot.getValue(exec, propertyName); |
| if (exec->hadException()) |
| return false; |
| |
| rollBackPoint = builder.length(); |
| |
| // Append the separator string. |
| if (builder[rollBackPoint - 1] != '{') |
| builder.append(','); |
| stringifier.startNewLine(builder); |
| |
| // Append the property name. |
| appendQuotedString(builder, propertyName.string()); |
| builder.append(':'); |
| if (stringifier.willIndent()) |
| builder.append(' '); |
| |
| // Append the stringified value. |
| stringifyResult = stringifier.appendStringifiedValue(builder, value, m_object.get(), propertyName); |
| } |
| |
| // From this point on, no access to the this pointer or to any members, because the |
| // Holder object may have moved if the call to stringify pushed a new Holder onto |
| // m_holderStack. |
| |
| switch (stringifyResult) { |
| case StringifyFailed: |
| builder.appendLiteral("null"); |
| break; |
| case StringifySucceeded: |
| break; |
| case StringifyFailedDueToUndefinedValue: |
| // This only occurs when get an undefined value for an object property. |
| // In this case we don't want the separator and property name that we |
| // already appended, so roll back. |
| builder.resize(rollBackPoint); |
| break; |
| } |
| |
| return true; |
| } |
| |
| // ------------------------------ JSONObject -------------------------------- |
| |
| const ClassInfo JSONObject::s_info = { "JSON", JSNonFinalObject::s_classinfo(), 0, ExecState::jsonTable, CREATE_METHOD_TABLE(JSONObject) }; |
| |
| /* Source for JSONObject.lut.h |
| @begin jsonTable |
| parse JSONProtoFuncParse DontEnum|Function 2 |
| stringify JSONProtoFuncStringify DontEnum|Function 3 |
| @end |
| */ |
| |
| // ECMA 15.8 |
| |
| bool JSONObject::getOwnPropertySlot(JSCell* cell, ExecState* exec, PropertyName propertyName, PropertySlot& slot) |
| { |
| return getStaticFunctionSlot<JSObject>(exec, ExecState::jsonTable(exec), jsCast<JSONObject*>(cell), propertyName, slot); |
| } |
| |
| bool JSONObject::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, PropertyName propertyName, PropertyDescriptor& descriptor) |
| { |
| return getStaticFunctionDescriptor<JSObject>(exec, ExecState::jsonTable(exec), jsCast<JSONObject*>(object), propertyName, descriptor); |
| } |
| |
| class Walker { |
| public: |
| Walker(ExecState* exec, Handle<JSObject> function, CallType callType, CallData callData) |
| : m_exec(exec) |
| , m_function(exec->globalData(), function) |
| , m_callType(callType) |
| , m_callData(callData) |
| { |
| } |
| JSValue walk(JSValue unfiltered); |
| private: |
| JSValue callReviver(JSObject* thisObj, JSValue property, JSValue unfiltered) |
| { |
| MarkedArgumentBuffer args; |
| args.append(property); |
| args.append(unfiltered); |
| return call(m_exec, m_function.get(), m_callType, m_callData, thisObj, args); |
| } |
| |
| friend class Holder; |
| |
| ExecState* m_exec; |
| Local<JSObject> m_function; |
| CallType m_callType; |
| CallData m_callData; |
| }; |
| |
| // We clamp recursion well beyond anything reasonable, but we also have a timeout check |
| // to guard against "infinite" execution by inserting arbitrarily large objects. |
| static const unsigned maximumFilterRecursion = 40000; |
| enum WalkerState { StateUnknown, ArrayStartState, ArrayStartVisitMember, ArrayEndVisitMember, |
| ObjectStartState, ObjectStartVisitMember, ObjectEndVisitMember }; |
| NEVER_INLINE JSValue Walker::walk(JSValue unfiltered) |
| { |
| Vector<PropertyNameArray, 16> propertyStack; |
| Vector<uint32_t, 16> indexStack; |
| LocalStack<JSObject, 16> objectStack(m_exec->globalData()); |
| LocalStack<JSArray, 16> arrayStack(m_exec->globalData()); |
| |
| Vector<WalkerState, 16> stateStack; |
| WalkerState state = StateUnknown; |
| JSValue inValue = unfiltered; |
| JSValue outValue = jsNull(); |
| |
| TimeoutChecker localTimeoutChecker(m_exec->globalData().timeoutChecker); |
| localTimeoutChecker.reset(); |
| unsigned tickCount = localTimeoutChecker.ticksUntilNextCheck(); |
| while (1) { |
| switch (state) { |
| arrayStartState: |
| case ArrayStartState: { |
| ASSERT(inValue.isObject()); |
| ASSERT(isJSArray(asObject(inValue)) || asObject(inValue)->inherits(&JSArray::s_info)); |
| if (objectStack.size() + arrayStack.size() > maximumFilterRecursion) |
| return throwError(m_exec, createStackOverflowError(m_exec)); |
| |
| JSArray* array = asArray(inValue); |
| arrayStack.push(array); |
| indexStack.append(0); |
| // fallthrough |
| } |
| arrayStartVisitMember: |
| case ArrayStartVisitMember: { |
| if (!--tickCount) { |
| if (localTimeoutChecker.didTimeOut(m_exec)) |
| return throwError(m_exec, createInterruptedExecutionException(&m_exec->globalData())); |
| tickCount = localTimeoutChecker.ticksUntilNextCheck(); |
| } |
| |
| JSArray* array = arrayStack.peek(); |
| uint32_t index = indexStack.last(); |
| if (index == array->length()) { |
| outValue = array; |
| arrayStack.pop(); |
| indexStack.removeLast(); |
| break; |
| } |
| if (isJSArray(array) && array->canGetIndexQuickly(index)) |
| inValue = array->getIndexQuickly(index); |
| else { |
| PropertySlot slot; |
| if (array->methodTable()->getOwnPropertySlotByIndex(array, m_exec, index, slot)) |
| inValue = slot.getValue(m_exec, index); |
| else |
| inValue = jsUndefined(); |
| } |
| |
| if (inValue.isObject()) { |
| stateStack.append(ArrayEndVisitMember); |
| goto stateUnknown; |
| } else |
| outValue = inValue; |
| // fallthrough |
| } |
| case ArrayEndVisitMember: { |
| JSArray* array = arrayStack.peek(); |
| JSValue filteredValue = callReviver(array, jsString(m_exec, String::number(indexStack.last())), outValue); |
| if (filteredValue.isUndefined()) |
| array->methodTable()->deletePropertyByIndex(array, m_exec, indexStack.last()); |
| else |
| array->putDirectIndex(m_exec, indexStack.last(), filteredValue); |
| if (m_exec->hadException()) |
| return jsNull(); |
| indexStack.last()++; |
| goto arrayStartVisitMember; |
| } |
| objectStartState: |
| case ObjectStartState: { |
| ASSERT(inValue.isObject()); |
| ASSERT(!isJSArray(asObject(inValue)) && !asObject(inValue)->inherits(&JSArray::s_info)); |
| if (objectStack.size() + arrayStack.size() > maximumFilterRecursion) |
| return throwError(m_exec, createStackOverflowError(m_exec)); |
| |
| JSObject* object = asObject(inValue); |
| objectStack.push(object); |
| indexStack.append(0); |
| propertyStack.append(PropertyNameArray(m_exec)); |
| object->methodTable()->getOwnPropertyNames(object, m_exec, propertyStack.last(), ExcludeDontEnumProperties); |
| // fallthrough |
| } |
| objectStartVisitMember: |
| case ObjectStartVisitMember: { |
| if (!--tickCount) { |
| if (localTimeoutChecker.didTimeOut(m_exec)) |
| return throwError(m_exec, createInterruptedExecutionException(&m_exec->globalData())); |
| tickCount = localTimeoutChecker.ticksUntilNextCheck(); |
| } |
| |
| JSObject* object = objectStack.peek(); |
| uint32_t index = indexStack.last(); |
| PropertyNameArray& properties = propertyStack.last(); |
| if (index == properties.size()) { |
| outValue = object; |
| objectStack.pop(); |
| indexStack.removeLast(); |
| propertyStack.removeLast(); |
| break; |
| } |
| PropertySlot slot; |
| if (object->methodTable()->getOwnPropertySlot(object, m_exec, properties[index], slot)) |
| inValue = slot.getValue(m_exec, properties[index]); |
| else |
| inValue = jsUndefined(); |
| |
| // The holder may be modified by the reviver function so any lookup may throw |
| if (m_exec->hadException()) |
| return jsNull(); |
| |
| if (inValue.isObject()) { |
| stateStack.append(ObjectEndVisitMember); |
| goto stateUnknown; |
| } else |
| outValue = inValue; |
| // fallthrough |
| } |
| case ObjectEndVisitMember: { |
| JSObject* object = objectStack.peek(); |
| Identifier prop = propertyStack.last()[indexStack.last()]; |
| PutPropertySlot slot; |
| JSValue filteredValue = callReviver(object, jsString(m_exec, prop.string()), outValue); |
| if (filteredValue.isUndefined()) |
| object->methodTable()->deleteProperty(object, m_exec, prop); |
| else |
| object->methodTable()->put(object, m_exec, prop, filteredValue, slot); |
| if (m_exec->hadException()) |
| return jsNull(); |
| indexStack.last()++; |
| goto objectStartVisitMember; |
| } |
| stateUnknown: |
| case StateUnknown: |
| if (!inValue.isObject()) { |
| outValue = inValue; |
| break; |
| } |
| JSObject* object = asObject(inValue); |
| if (isJSArray(object) || object->inherits(&JSArray::s_info)) |
| goto arrayStartState; |
| goto objectStartState; |
| } |
| if (stateStack.isEmpty()) |
| break; |
| |
| state = stateStack.last(); |
| stateStack.removeLast(); |
| |
| if (!--tickCount) { |
| if (localTimeoutChecker.didTimeOut(m_exec)) |
| return throwError(m_exec, createInterruptedExecutionException(&m_exec->globalData())); |
| tickCount = localTimeoutChecker.ticksUntilNextCheck(); |
| } |
| } |
| JSObject* finalHolder = constructEmptyObject(m_exec); |
| PutPropertySlot slot; |
| finalHolder->methodTable()->put(finalHolder, m_exec, m_exec->globalData().propertyNames->emptyIdentifier, outValue, slot); |
| return callReviver(finalHolder, jsEmptyString(m_exec), outValue); |
| } |
| |
| // ECMA-262 v5 15.12.2 |
| EncodedJSValue JSC_HOST_CALL JSONProtoFuncParse(ExecState* exec) |
| { |
| if (!exec->argumentCount()) |
| return throwVMError(exec, createError(exec, ASCIILiteral("JSON.parse requires at least one parameter"))); |
| String source = exec->argument(0).toString(exec)->value(exec); |
| if (exec->hadException()) |
| return JSValue::encode(jsNull()); |
| |
| JSValue unfiltered; |
| LocalScope scope(exec->globalData()); |
| if (source.is8Bit()) { |
| LiteralParser<LChar> jsonParser(exec, source.characters8(), source.length(), StrictJSON); |
| unfiltered = jsonParser.tryLiteralParse(); |
| if (!unfiltered) |
| return throwVMError(exec, createSyntaxError(exec, jsonParser.getErrorMessage())); |
| } else { |
| LiteralParser<UChar> jsonParser(exec, source.characters16(), source.length(), StrictJSON); |
| unfiltered = jsonParser.tryLiteralParse(); |
| if (!unfiltered) |
| return throwVMError(exec, createSyntaxError(exec, jsonParser.getErrorMessage())); |
| } |
| |
| if (exec->argumentCount() < 2) |
| return JSValue::encode(unfiltered); |
| |
| JSValue function = exec->argument(1); |
| CallData callData; |
| CallType callType = getCallData(function, callData); |
| if (callType == CallTypeNone) |
| return JSValue::encode(unfiltered); |
| return JSValue::encode(Walker(exec, Local<JSObject>(exec->globalData(), asObject(function)), callType, callData).walk(unfiltered)); |
| } |
| |
| // ECMA-262 v5 15.12.3 |
| EncodedJSValue JSC_HOST_CALL JSONProtoFuncStringify(ExecState* exec) |
| { |
| if (!exec->argumentCount()) |
| return throwVMError(exec, createError(exec, ASCIILiteral("No input to stringify"))); |
| LocalScope scope(exec->globalData()); |
| Local<Unknown> value(exec->globalData(), exec->argument(0)); |
| Local<Unknown> replacer(exec->globalData(), exec->argument(1)); |
| Local<Unknown> space(exec->globalData(), exec->argument(2)); |
| return JSValue::encode(Stringifier(exec, replacer, space).stringify(value).get()); |
| } |
| |
| String JSONStringify(ExecState* exec, JSValue value, unsigned indent) |
| { |
| LocalScope scope(exec->globalData()); |
| Local<Unknown> result = Stringifier(exec, Local<Unknown>(exec->globalData(), jsNull()), Local<Unknown>(exec->globalData(), jsNumber(indent))).stringify(Local<Unknown>(exec->globalData(), value)); |
| if (result.isUndefinedOrNull()) |
| return String(); |
| return result.getString(exec); |
| } |
| |
| } // namespace JSC |
