+++ /dev/null
-/*
- * Copyright (C) 1999-2002 Harri Porten (porten@kde.org)
- * Copyright (C) 2001 Peter Kelly (pmk@post.com)
- * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
- * Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca)
- * Copyright (C) 2007 Maks Orlovich
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB. If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
- */
-
-#include "config.h"
-#include "Arguments.h"
-
-#include "JSActivation.h"
-#include "JSFunction.h"
-#include "JSGlobalObject.h"
-
-using namespace std;
-
-namespace JSC {
-
-ASSERT_CLASS_FITS_IN_CELL(Arguments);
-
-const ClassInfo Arguments::s_info = { "Arguments", &JSNonFinalObject::s_info, 0, 0 };
-
-Arguments::~Arguments()
-{
- if (d->extraArguments != d->extraArgumentsFixedBuffer)
- delete [] d->extraArguments;
-}
-
-void Arguments::visitChildren(SlotVisitor& visitor)
-{
- ASSERT_GC_OBJECT_INHERITS(this, &s_info);
- COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
- ASSERT(structure()->typeInfo().overridesVisitChildren());
- JSObject::visitChildren(visitor);
-
- if (d->registerArray)
- visitor.appendValues(d->registerArray.get(), d->numParameters);
-
- if (d->extraArguments) {
- unsigned numExtraArguments = d->numArguments - d->numParameters;
- visitor.appendValues(d->extraArguments, numExtraArguments);
- }
-
- visitor.append(&d->callee);
-
- if (d->activation)
- visitor.append(&d->activation);
-}
-
-void Arguments::copyToRegisters(ExecState* exec, Register* buffer, uint32_t maxSize)
-{
- if (UNLIKELY(d->overrodeLength)) {
- unsigned length = min(get(exec, exec->propertyNames().length).toUInt32(exec), maxSize);
- for (unsigned i = 0; i < length; i++)
- buffer[i] = get(exec, i);
- return;
- }
-
- if (LIKELY(!d->deletedArguments)) {
- unsigned parametersLength = min(min(d->numParameters, d->numArguments), maxSize);
- unsigned i = 0;
- for (; i < parametersLength; ++i)
- buffer[i] = d->registers[d->firstParameterIndex + i].get();
- for (; i < d->numArguments; ++i)
- buffer[i] = d->extraArguments[i - d->numParameters].get();
- return;
- }
-
- unsigned parametersLength = min(min(d->numParameters, d->numArguments), maxSize);
- unsigned i = 0;
- for (; i < parametersLength; ++i) {
- if (!d->deletedArguments[i])
- buffer[i] = d->registers[d->firstParameterIndex + i].get();
- else
- buffer[i] = get(exec, i);
- }
- for (; i < d->numArguments; ++i) {
- if (!d->deletedArguments[i])
- buffer[i] = d->extraArguments[i - d->numParameters].get();
- else
- buffer[i] = get(exec, i);
- }
-}
-
-void Arguments::fillArgList(ExecState* exec, MarkedArgumentBuffer& args)
-{
- if (UNLIKELY(d->overrodeLength)) {
- unsigned length = get(exec, exec->propertyNames().length).toUInt32(exec);
- for (unsigned i = 0; i < length; i++)
- args.append(get(exec, i));
- return;
- }
-
- if (LIKELY(!d->deletedArguments)) {
- if (LIKELY(!d->numParameters)) {
- args.initialize(d->extraArguments, d->numArguments);
- return;
- }
-
- if (d->numParameters == d->numArguments) {
- args.initialize(&d->registers[d->firstParameterIndex], d->numArguments);
- return;
- }
-
- unsigned parametersLength = min(d->numParameters, d->numArguments);
- unsigned i = 0;
- for (; i < parametersLength; ++i)
- args.append(d->registers[d->firstParameterIndex + i].get());
- for (; i < d->numArguments; ++i)
- args.append(d->extraArguments[i - d->numParameters].get());
- return;
- }
-
- unsigned parametersLength = min(d->numParameters, d->numArguments);
- unsigned i = 0;
- for (; i < parametersLength; ++i) {
- if (!d->deletedArguments[i])
- args.append(d->registers[d->firstParameterIndex + i].get());
- else
- args.append(get(exec, i));
- }
- for (; i < d->numArguments; ++i) {
- if (!d->deletedArguments[i])
- args.append(d->extraArguments[i - d->numParameters].get());
- else
- args.append(get(exec, i));
- }
-}
-
-bool Arguments::getOwnPropertySlot(ExecState* exec, unsigned i, PropertySlot& slot)
-{
- if (i < d->numArguments && (!d->deletedArguments || !d->deletedArguments[i])) {
- if (i < d->numParameters) {
- slot.setValue(d->registers[d->firstParameterIndex + i].get());
- } else
- slot.setValue(d->extraArguments[i - d->numParameters].get());
- return true;
- }
-
- return JSObject::getOwnPropertySlot(exec, Identifier(exec, UString::number(i)), slot);
-}
-
-void Arguments::createStrictModeCallerIfNecessary(ExecState* exec)
-{
- if (d->overrodeCaller)
- return;
-
- d->overrodeCaller = true;
- PropertyDescriptor descriptor;
- JSValue thrower = createTypeErrorFunction(exec, "Unable to access caller of strict mode function");
- descriptor.setAccessorDescriptor(thrower, thrower, DontEnum | DontDelete | Getter | Setter);
- defineOwnProperty(exec, exec->propertyNames().caller, descriptor, false);
-}
-
-void Arguments::createStrictModeCalleeIfNecessary(ExecState* exec)
-{
- if (d->overrodeCallee)
- return;
-
- d->overrodeCallee = true;
- PropertyDescriptor descriptor;
- JSValue thrower = createTypeErrorFunction(exec, "Unable to access callee of strict mode function");
- descriptor.setAccessorDescriptor(thrower, thrower, DontEnum | DontDelete | Getter | Setter);
- defineOwnProperty(exec, exec->propertyNames().callee, descriptor, false);
-}
-
-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.setValue(d->registers[d->firstParameterIndex + i].get());
- } else
- slot.setValue(d->extraArguments[i - d->numParameters].get());
- 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.get());
- return true;
- }
- createStrictModeCalleeIfNecessary(exec);
- }
-
- if (propertyName == exec->propertyNames().caller && d->isStrictMode)
- createStrictModeCallerIfNecessary(exec);
-
- return JSObject::getOwnPropertySlot(exec, propertyName, slot);
-}
-
-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(), DontEnum);
- } else
- descriptor.setDescriptor(d->extraArguments[i - d->numParameters].get(), DontEnum);
- 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::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
-{
- if (mode == IncludeDontEnumProperties) {
- for (unsigned i = 0; i < d->numArguments; ++i) {
- if (!d->deletedArguments || !d->deletedArguments[i])
- propertyNames.add(Identifier(exec, UString::number(i)));
- }
- propertyNames.add(exec->propertyNames().callee);
- propertyNames.add(exec->propertyNames().length);
- }
- JSObject::getOwnPropertyNames(exec, propertyNames, mode);
-}
-
-void Arguments::put(ExecState* exec, unsigned i, JSValue value)
-{
- if (i < d->numArguments && (!d->deletedArguments || !d->deletedArguments[i])) {
- if (i < d->numParameters)
- d->registers[d->firstParameterIndex + i].set(exec->globalData(), d->activation ? static_cast<JSCell*>(d->activation.get()) : static_cast<JSCell*>(this), value);
- else
- d->extraArguments[i - d->numParameters].set(exec->globalData(), this, value);
- return;
- }
-
- PutPropertySlot slot;
- JSObject::put(exec, Identifier(exec, UString::number(i)), value, slot);
-}
-
-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].set(exec->globalData(), d->activation ? static_cast<JSCell*>(d->activation.get()) : static_cast<JSCell*>(this), value);
- else
- d->extraArguments[i - d->numParameters].set(exec->globalData(), this, value);
- return;
- }
-
- if (propertyName == exec->propertyNames().length && !d->overrodeLength) {
- d->overrodeLength = true;
- putDirect(exec->globalData(), propertyName, value, DontEnum);
- return;
- }
-
- if (propertyName == exec->propertyNames().callee && !d->overrodeCallee) {
- if (!d->isStrictMode) {
- d->overrodeCallee = true;
- putDirect(exec->globalData(), 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, unsigned i)
-{
- if (i < d->numArguments) {
- if (!d->deletedArguments) {
- d->deletedArguments = adoptArrayPtr(new bool[d->numArguments]);
- memset(d->deletedArguments.get(), 0, sizeof(bool) * d->numArguments);
- }
- if (!d->deletedArguments[i]) {
- d->deletedArguments[i] = true;
- return true;
- }
- }
-
- return JSObject::deleteProperty(exec, Identifier(exec, UString::number(i)));
-}
-
-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 = adoptArrayPtr(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);
-}
-
-} // namespace JSC
projects / apple / javascriptcore.git / blobdiff