APICallbackFunction.h [plain text]
#ifndef APICallbackFunction_h
#define APICallbackFunction_h
#include "APICast.h"
#include "Error.h"
#include "JSCallbackConstructor.h"
#include "JSLock.h"
#include <wtf/Vector.h>
namespace JSC {
struct APICallbackFunction {
template <typename T> static EncodedJSValue callImpl(JSGlobalObject*, CallFrame*);
template <typename T> static EncodedJSValue constructImpl(JSGlobalObject*, CallFrame*);
};
template <typename T>
EncodedJSValue APICallbackFunction::callImpl(JSGlobalObject* globalObject, CallFrame* callFrame)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSContextRef execRef = toRef(globalObject);
JSObjectRef functionRef = toRef(callFrame->jsCallee());
JSObjectRef thisObjRef = toRef(jsCast<JSObject*>(callFrame->thisValue().toThis(globalObject, ECMAMode::sloppy())));
int argumentCount = static_cast<int>(callFrame->argumentCount());
Vector<JSValueRef, 16> arguments;
arguments.reserveInitialCapacity(argumentCount);
for (int i = 0; i < argumentCount; i++)
arguments.uncheckedAppend(toRef(globalObject, callFrame->uncheckedArgument(i)));
JSValueRef exception = nullptr;
JSValueRef result;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
result = jsCast<T*>(toJS(functionRef))->functionCallback()(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception);
}
if (exception) {
throwException(globalObject, scope, toJS(globalObject, exception));
return JSValue::encode(jsUndefined());
}
if (!result)
return JSValue::encode(jsUndefined());
return JSValue::encode(toJS(globalObject, result));
}
template <typename T>
EncodedJSValue APICallbackFunction::constructImpl(JSGlobalObject* globalObject, CallFrame* callFrame)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue callee = callFrame->jsCallee();
T* constructor = jsCast<T*>(callFrame->jsCallee());
JSContextRef ctx = toRef(globalObject);
JSObjectRef constructorRef = toRef(constructor);
JSObjectCallAsConstructorCallback callback = constructor->constructCallback();
if (callback) {
JSValue prototype;
JSValue newTarget = callFrame->newTarget();
if (newTarget != constructor) {
prototype = newTarget.get(globalObject, vm.propertyNames->prototype);
RETURN_IF_EXCEPTION(scope, { });
}
size_t argumentCount = callFrame->argumentCount();
Vector<JSValueRef, 16> arguments;
arguments.reserveInitialCapacity(argumentCount);
for (size_t i = 0; i < argumentCount; ++i)
arguments.uncheckedAppend(toRef(globalObject, callFrame->uncheckedArgument(i)));
JSValueRef exception = nullptr;
JSObjectRef result;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
result = callback(ctx, constructorRef, argumentCount, arguments.data(), &exception);
}
if (exception) {
throwException(globalObject, scope, toJS(globalObject, exception));
return JSValue::encode(jsUndefined());
}
if (!result)
return throwVMTypeError(globalObject, scope);
JSObject* newObject = toJS(result);
if (newTarget != constructor && newObject->getPrototypeDirect(vm) == constructor->get(globalObject, vm.propertyNames->prototype)) {
RETURN_IF_EXCEPTION(scope, { });
newObject->setPrototype(vm, globalObject, prototype);
RETURN_IF_EXCEPTION(scope, { });
}
return JSValue::encode(newObject);
}
return JSValue::encode(toJS(JSObjectMake(ctx, jsCast<JSCallbackConstructor*>(callee)->classRef(), nullptr)));
}
}
#endif // APICallbackFunction_h