bool Arguments::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
{
bool isArrayIndex;
unsigned i = propertyName.toArrayIndex(isArrayIndex);
if (isArrayIndex && i < d->numArguments && (!d->deletedArguments || !d->deletedArguments[i])) {
if (i < d->numParameters) {
descriptor.setDescriptor(d->registers[d->firstParameterIndex + i].get(), None);
} else
descriptor.setDescriptor(d->extraArguments[i - d->numParameters].get(), None);
return true;
}
if (propertyName == exec->propertyNames().length && LIKELY(!d->overrodeLength)) {
descriptor.setDescriptor(jsNumber(d->numArguments), DontEnum);
return true;
}
if (propertyName == exec->propertyNames().callee && LIKELY(!d->overrodeCallee)) {
if (!d->isStrictMode) {
descriptor.setDescriptor(d->callee.get(), DontEnum);
return true;
}
createStrictModeCalleeIfNecessary(exec);
}
if (propertyName == exec->propertyNames().caller && d->isStrictMode)
createStrictModeCallerIfNecessary(exec);
return JSObject::getOwnPropertyDescriptor(exec, propertyName, descriptor);
}
void Arguments::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
{
bool isArrayIndex;
unsigned i = propertyName.toArrayIndex(isArrayIndex);
if (isArrayIndex && i < d->numArguments && (!d->deletedArguments || !d->deletedArguments[i])) {
if (i < d->numParameters)
d->registers[d->firstParameterIndex + i] = JSValue(value);
else
d->extraArguments[i - d->numParameters] = JSValue(value);
return;
}
if (propertyName == exec->propertyNames().length && !d->overrodeLength) {
d->overrodeLength = true;
putDirect(propertyName, value, DontEnum);
return;
}
if (propertyName == exec->propertyNames().callee && !d->overrodeCallee) {
if (!d->isStrictMode) {
d->overrodeCallee = true;
putDirect(propertyName, value, DontEnum);
return;
}
createStrictModeCalleeIfNecessary(exec);
}
if (propertyName == exec->propertyNames().caller && d->isStrictMode)
createStrictModeCallerIfNecessary(exec);
JSObject::put(exec, propertyName, value, slot);
}
bool Arguments::deleteProperty(ExecState* exec, const Identifier& propertyName)
{
bool isArrayIndex;
unsigned i = propertyName.toArrayIndex(isArrayIndex);
if (isArrayIndex && i < d->numArguments) {
if (!d->deletedArguments) {
d->deletedArguments.set(new bool[d->numArguments]);
memset(d->deletedArguments.get(), 0, sizeof(bool) * d->numArguments);
}
if (!d->deletedArguments[i]) {
d->deletedArguments[i] = true;
return true;
}
}
if (propertyName == exec->propertyNames().length && !d->overrodeLength) {
d->overrodeLength = true;
return true;
}
if (propertyName == exec->propertyNames().callee && !d->overrodeCallee) {
if (!d->isStrictMode) {
d->overrodeCallee = true;
return true;
}
createStrictModeCalleeIfNecessary(exec);
}
if (propertyName == exec->propertyNames().caller && !d->isStrictMode)
createStrictModeCallerIfNecessary(exec);
return JSObject::deleteProperty(exec, propertyName);
}
bool Arguments::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
{
bool isArrayIndex;
unsigned i = propertyName.toArrayIndex(isArrayIndex);
if (isArrayIndex && i < d->numArguments && (!d->deletedArguments || !d->deletedArguments[i])) {
if (i < d->numParameters) {
slot.setRegisterSlot(&d->registers[d->firstParameterIndex + i]);
} else
slot.setValue(d->extraArguments[i - d->numParameters].jsValue());
return true;
}
if (propertyName == exec->propertyNames().length && LIKELY(!d->overrodeLength)) {
slot.setValue(jsNumber(d->numArguments));
return true;
}
if (propertyName == exec->propertyNames().callee && LIKELY(!d->overrodeCallee)) {
if (!d->isStrictMode) {
slot.setValue(d->callee);
return true;
}
createStrictModeCalleeIfNecessary(exec);
}
if (propertyName == exec->propertyNames().caller && d->isStrictMode)
createStrictModeCallerIfNecessary(exec);
return JSObject::getOwnPropertySlot(exec, propertyName, slot);
}
