--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/JavaScriptCore/runtime/Arguments.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,304 @@
+/*
+ * 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::info = { "Arguments", 0, 0, 0 };
+
+Arguments::~Arguments()
+{
+ if (d->extraArguments != d->extraArgumentsFixedBuffer)
+ delete [] d->extraArguments;
+}
+
+void Arguments::markChildren(MarkStack& markStack)
+{
+ JSObject::markChildren(markStack);
+
+ if (d->registerArray)
+ markStack.appendValues(reinterpret_cast<JSValue*>(d->registerArray.get()), d->numParameters);
+
+ if (d->extraArguments) {
+ unsigned numExtraArguments = d->numArguments - d->numParameters;
+ markStack.appendValues(reinterpret_cast<JSValue*>(d->extraArguments), numExtraArguments);
+ }
+
+ markStack.append(d->callee);
+
+ if (d->activation)
+ markStack.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].jsValue();
+ for (; i < d->numArguments; ++i)
+ buffer[i] = d->extraArguments[i - d->numParameters].jsValue();
+ 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].jsValue();
+ else
+ buffer[i] = get(exec, i);
+ }
+ for (; i < d->numArguments; ++i) {
+ if (!d->deletedArguments[i])
+ buffer[i] = d->extraArguments[i - d->numParameters].jsValue();
+ 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].jsValue());
+ for (; i < d->numArguments; ++i)
+ args.append(d->extraArguments[i - d->numParameters].jsValue());
+ 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].jsValue());
+ else
+ args.append(get(exec, i));
+ }
+ for (; i < d->numArguments; ++i) {
+ if (!d->deletedArguments[i])
+ args.append(d->extraArguments[i - d->numParameters].jsValue());
+ 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.setRegisterSlot(&d->registers[d->firstParameterIndex + i]);
+ } else
+ slot.setValue(d->extraArguments[i - d->numParameters].jsValue());
+ return true;
+ }
+
+ return JSObject::getOwnPropertySlot(exec, Identifier(exec, UString::from(i)), slot);
+}
+
+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(exec, d->numArguments));
+ return true;
+ }
+
+ if (propertyName == exec->propertyNames().callee && LIKELY(!d->overrodeCallee)) {
+ slot.setValue(d->callee);
+ return true;
+ }
+
+ 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].jsValue(), DontEnum);
+ } else
+ descriptor.setDescriptor(d->extraArguments[i - d->numParameters].jsValue(), DontEnum);
+ return true;
+ }
+
+ if (propertyName == exec->propertyNames().length && LIKELY(!d->overrodeLength)) {
+ descriptor.setDescriptor(jsNumber(exec, d->numArguments), DontEnum);
+ return true;
+ }
+
+ if (propertyName == exec->propertyNames().callee && LIKELY(!d->overrodeCallee)) {
+ descriptor.setDescriptor(d->callee, DontEnum);
+ return true;
+ }
+
+ 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::from(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, PutPropertySlot& slot)
+{
+ if (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;
+ }
+
+ JSObject::put(exec, Identifier(exec, UString::from(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] = 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) {
+ d->overrodeCallee = true;
+ putDirect(propertyName, value, DontEnum);
+ return;
+ }
+
+ JSObject::put(exec, propertyName, value, slot);
+}
+
+bool Arguments::deleteProperty(ExecState* exec, unsigned i)
+{
+ if (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;
+ }
+ }
+
+ return JSObject::deleteProperty(exec, Identifier(exec, UString::from(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.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) {
+ d->overrodeCallee = true;
+ return true;
+ }
+
+ return JSObject::deleteProperty(exec, propertyName);
+}
+
+} // namespace JSC