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/*
* 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 "UStringBuilder.h"
#include "UStringConcatenate.h"
#include <wtf/MathExtras.h>
namespace JSC {
ASSERT_CLASS_FITS_IN_CELL(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)
: JSObjectWithGlobalObject(globalObject, structure)
{
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 markAggregate(MarkStack&);
private:
class Holder {
public:
Holder(JSGlobalData&, JSObject*);
JSObject* object() const { return m_object.get(); }
bool appendNextProperty(Stringifier&, UStringBuilder&);
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(UStringBuilder&, const UString&);
JSValue toJSON(JSValue, const PropertyNameForFunctionCall&);
enum StringifyResult { StringifyFailed, StringifySucceeded, StringifyFailedDueToUndefinedValue };
StringifyResult appendStringifiedValue(UStringBuilder&, JSValue, JSObject* holder, const PropertyNameForFunctionCall&);
bool willIndent() const;
void indent();
void unindent();
void startNewLine(UStringBuilder&) const;
ExecState* const m_exec;
const Local<Unknown> m_replacer;
bool m_usingArrayReplacer;
PropertyNameArray m_arrayReplacerPropertyNames;
CallType m_replacerCallType;
CallData m_replacerCallData;
const UString m_gap;
Vector<Holder, 16> m_holderStack;
UString m_repeatedGap;
UString 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_info))
return jsNumber(object->toNumber(exec));
if (object->inherits(&StringObject::s_info))
return jsString(exec, object->toString(exec));
if (object->inherits(&BooleanObject::s_info))
return object->toPrimitive(exec);
return value;
}
static inline UString 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.
double spaceCount;
if (space.getNumber(spaceCount)) {
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 UString(spaces, count);
}
// If the space value is a string, use it as the gap string, otherwise use no gap string.
UString 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->ustring());
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_info)) {
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;
UString propertyName;
if (name.getString(exec, propertyName)) {
m_arrayReplacerPropertyNames.add(Identifier(exec, propertyName));
continue;
}
double value = 0;
if (name.getNumber(value)) {
m_arrayReplacerPropertyNames.add(Identifier::from(exec, value));
continue;
}
if (name.isObject()) {
if (!asObject(name)->inherits(&NumberObject::s_info) && !asObject(name)->inherits(&StringObject::s_info))
continue;
propertyName = name.toString(exec);
if (exec->hadException())
break;
m_arrayReplacerPropertyNames.add(Identifier(exec, propertyName));
}
}
return;
}
m_replacerCallType = m_replacer.asObject()->getCallData(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());
UStringBuilder 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.toUString()));
}
void Stringifier::appendQuotedString(UStringBuilder& builder, const UString& value)
{
int length = value.length();
builder.append('"');
const UChar* data = value.characters();
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];
UChar hex[] = { '\\', 'u', hexDigits[(ch >> 12) & 0xF], hexDigits[(ch >> 8) & 0xF], hexDigits[(ch >> 4) & 0xF], hexDigits[ch & 0xF] };
builder.append(hex, WTF_ARRAY_LENGTH(hex));
break;
}
}
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->getCallData(callData);
if (callType == CallTypeNone)
return value;
JSValue list[] = { propertyName.value(m_exec) };
ArgList args(list, WTF_ARRAY_LENGTH(list));
return call(m_exec, object, callType, callData, value, args);
}
Stringifier::StringifyResult Stringifier::appendStringifiedValue(UStringBuilder& 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) {
JSValue list[] = { propertyName.value(m_exec), value };
ArgList args(list, WTF_ARRAY_LENGTH(list));
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_info))
return StringifyFailedDueToUndefinedValue;
if (value.isNull()) {
builder.append("null");
return StringifySucceeded;
}
value = unwrapBoxedPrimitive(m_exec, value);
if (m_exec->hadException())
return StringifyFailed;
if (value.isBoolean()) {
builder.append(value.getBoolean() ? "true" : "false");
return StringifySucceeded;
}
UString stringValue;
if (value.getString(m_exec, stringValue)) {
appendQuotedString(builder, stringValue);
return StringifySucceeded;
}
double numericValue;
if (value.getNumber(numericValue)) {
if (!isfinite(numericValue))
builder.append("null");
else
builder.append(UString::number(numericValue));
return StringifySucceeded;
}
if (!value.isObject())
return StringifyFailed;
JSObject* object = asObject(value);
CallData callData;
if (object->getCallData(callData) != CallTypeNone) {
if (holder->inherits(&JSArray::s_info)) {
builder.append("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, "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 = makeUString(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(UStringBuilder& 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_info))
, m_index(0)
{
}
bool Stringifier::Holder::appendNextProperty(Stringifier& stringifier, UStringBuilder& builder)
{
ASSERT(m_index <= m_size);
ExecState* exec = stringifier.m_exec;
// First time through, initialize.
if (!m_index) {
if (m_isArray) {
m_isJSArray = isJSArray(&exec->globalData(), 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->getOwnPropertyNames(exec, objectPropertyNames);
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())->canGetIndex(index))
value = asArray(m_object.get())->getIndex(index);
else {
PropertySlot slot(m_object.get());
if (!m_object->getOwnPropertySlot(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->getOwnPropertySlot(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.ustring());
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.append("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", &JSObjectWithGlobalObject::s_info, 0, ExecState::jsonTable };
/* Source for JSONObject.lut.h
@begin jsonTable
parse JSONProtoFuncParse DontEnum|Function 2
stringify JSONProtoFuncStringify DontEnum|Function 3
@end
*/
// ECMA 15.8
bool JSONObject::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
{
return getStaticFunctionSlot<JSObject>(exec, ExecState::jsonTable(exec), this, propertyName, slot);
}
bool JSONObject::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
{
return getStaticFunctionDescriptor<JSObject>(exec, ExecState::jsonTable(exec), this, 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)
{
JSValue args[] = { property, unfiltered };
ArgList argList(args, 2);
return call(m_exec, m_function.get(), m_callType, m_callData, thisObj, argList);
}
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(&m_exec->globalData(), 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(&m_exec->globalData(), array) && array->canGetIndex(index))
inValue = array->getIndex(index);
else {
PropertySlot slot;
if (array->getOwnPropertySlot(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, UString::number(indexStack.last())), outValue);
if (filteredValue.isUndefined())
array->deleteProperty(m_exec, indexStack.last());
else {
if (isJSArray(&m_exec->globalData(), array) && array->canSetIndex(indexStack.last()))
array->setIndex(m_exec->globalData(), indexStack.last(), filteredValue);
else
array->put(m_exec, indexStack.last(), filteredValue);
}
if (m_exec->hadException())
return jsNull();
indexStack.last()++;
goto arrayStartVisitMember;
}
objectStartState:
case ObjectStartState: {
ASSERT(inValue.isObject());
ASSERT(!isJSArray(&m_exec->globalData(), 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->getOwnPropertyNames(m_exec, propertyStack.last());
// 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->getOwnPropertySlot(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.ustring()), outValue);
if (filteredValue.isUndefined())
object->deleteProperty(m_exec, prop);
else
object->put(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(&m_exec->globalData(), 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->put(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, "JSON.parse requires at least one parameter"));
JSValue value = exec->argument(0);
UString source = value.toString(exec);
if (exec->hadException())
return JSValue::encode(jsNull());
LocalScope scope(exec->globalData());
LiteralParser jsonParser(exec, source, LiteralParser::StrictJSON);
JSValue unfiltered = jsonParser.tryLiteralParse();
if (!unfiltered)
return throwVMError(exec, createSyntaxError(exec, "Unable to parse JSON string"));
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, "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());
}
UString 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 UString();
return result.getString(exec);
}
} // namespace JSC