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https://github.com/Samsung/escargot.git
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d9a9bcf860
* Object::construct directly calls each internal construct method without any check code * ByteCodeInterpreter::constructOperation is added to run IsConstructor check code Signed-off-by: HyukWoo Park <hyukwoo.park@samsung.com>
93 lines
4.1 KiB
C++
93 lines
4.1 KiB
C++
/*
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* Copyright (c) 2019-present Samsung Electronics Co., Ltd
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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* USA
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*/
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#include "Escargot.h"
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#include "Object.h"
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#include "runtime/Context.h"
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#include "runtime/SmallValue.h"
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#include "runtime/FunctionObject.h"
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#include "BoundFunctionObject.h"
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namespace Escargot {
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BoundFunctionObject::BoundFunctionObject(ExecutionState& state, Object* targetFunction, Value& boundThis, size_t boundArgc, Value* boundArgv, const Value& length, const Value& name)
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: Object(state, ESCARGOT_OBJECT_BUILTIN_PROPERTY_NUMBER + 2, false)
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, m_boundTargetFunction(targetFunction)
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, m_boundThis(boundThis)
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{
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m_structure = state.context()->defaultStructureForBoundFunctionObject();
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m_values[ESCARGOT_OBJECT_BUILTIN_PROPERTY_NUMBER + 0] = length;
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m_values[ESCARGOT_OBJECT_BUILTIN_PROPERTY_NUMBER + 1] = name;
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Value proto = m_boundTargetFunction->getPrototype(state);
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Object::setPrototype(state, proto);
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if (boundArgc > 0) {
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m_boundArguments.resizeWithUninitializedValues(boundArgc);
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for (size_t i = 0; i < boundArgc; i++) {
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m_boundArguments[i] = boundArgv[i];
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}
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}
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}
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// https://www.ecma-international.org/ecma-262/6.0/#sec-bound-function-exotic-objects-call-thisargument-argumentslist
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Value BoundFunctionObject::call(ExecutionState& state, const Value& thisValue, const size_t calledArgc, Value* calledArgv)
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{
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// Let args be a new list containing the same values as the list boundArgs in the same order followed by the same values as the list argumentsList in the same order.
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size_t boundArgc = m_boundArguments.size();
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size_t mergedArgc = boundArgc + calledArgc;
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Value* mergedArgv = ALLOCA(mergedArgc * sizeof(Value), Value, state);
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for (size_t i = 0; i < boundArgc; i++) {
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mergedArgv[i] = m_boundArguments[i];
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}
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if (calledArgc > 0) {
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memcpy(mergedArgv + boundArgc, calledArgv, sizeof(Value) * calledArgc);
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}
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// Return Call(target, boundThis, args).
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return Object::call(state, m_boundTargetFunction, m_boundThis, mergedArgc, mergedArgv);
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}
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// https://www.ecma-international.org/ecma-262/6.0/#sec-bound-function-exotic-objects-construct-argumentslist-newtarget
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Object* BoundFunctionObject::construct(ExecutionState& state, const size_t calledArgc, Value* calledArgv, Object* newTarget)
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{
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ASSERT(m_boundTargetFunction && m_boundTargetFunction->isConstructor());
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// Let target be the value of F’s [[BoundTargetFunction]] internal slot.
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// Let boundArgs be the value of F’s [[BoundArguments]] internal slot.
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// Let args be a new list containing the same values as the list boundArgs in the same order followed by the same values as the list argumentsList in the same order.
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size_t boundArgc = m_boundArguments.size();
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size_t mergedArgc = boundArgc + calledArgc;
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Value* mergedArgv = ALLOCA(mergedArgc * sizeof(Value), Value, state);
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for (size_t i = 0; i < boundArgc; i++) {
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mergedArgv[i] = m_boundArguments[i];
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}
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if (calledArgc > 0) {
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memcpy(mergedArgv + boundArgc, calledArgv, sizeof(Value) * calledArgc);
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}
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// If SameValue(F, newTarget) is true, let newTarget be target.
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if (this == newTarget) {
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newTarget = Value(m_boundTargetFunction).asObject();
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}
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// Return Construct(target, args, newTarget).
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return Object::construct(state, m_boundTargetFunction, mergedArgc, mergedArgv, newTarget);
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}
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}
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