webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 132 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/runtime/Symbol.cpp b/Source/JavaScriptCore/runtime/Symbol.cpp
new file mode 100644
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+++ b/Source/JavaScriptCore/runtime/Symbol.cpp
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+/*
+ * Copyright (C) 2012, 2016 Apple Inc. All rights reserved.
+ * Copyright (C) 2015-2016 Yusuke Suzuki <utatane.tea@gmail.com>.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "Symbol.h"
+
+#include "Error.h"
+#include "JSCInlines.h"
+#include "SymbolObject.h"
+
+namespace JSC {
+
+const ClassInfo Symbol::s_info = { "symbol", nullptr, nullptr, CREATE_METHOD_TABLE(Symbol) };
+
+Symbol::Symbol(VM& vm)
+    : Base(vm, vm.symbolStructure.get())
+    , m_privateName()
+{
+}
+
+Symbol::Symbol(VM& vm, const String& string)
+    : Base(vm, vm.symbolStructure.get())
+    , m_privateName(PrivateName::Description, string)
+{
+}
+
+Symbol::Symbol(VM& vm, SymbolImpl& uid)
+    : Base(vm, vm.symbolStructure.get())
+    , m_privateName(uid)
+{
+}
+
+void Symbol::finishCreation(VM& vm)
+{
+    Base::finishCreation(vm);
+    ASSERT(inherits(vm, info()));
+
+    vm.symbolImplToSymbolMap.set(&m_privateName.uid(), this);
+}
+
+inline SymbolObject* SymbolObject::create(VM& vm, JSGlobalObject* globalObject, Symbol* symbol)
+{
+    SymbolObject* object = new (NotNull, allocateCell<SymbolObject>(vm.heap)) SymbolObject(vm, globalObject->symbolObjectStructure());
+    object->finishCreation(vm, symbol);
+    return object;
+}
+
+JSValue Symbol::toPrimitive(ExecState*, PreferredPrimitiveType) const
+{
+    return const_cast<Symbol*>(this);
+}
+
+bool Symbol::getPrimitiveNumber(ExecState* exec, double& number, JSValue& result) const
+{
+    result = this;
+    number = toNumber(exec);
+    return true;
+}
+
+JSObject* Symbol::toObject(ExecState* exec, JSGlobalObject* globalObject) const
+{
+    return SymbolObject::create(exec->vm(), globalObject, const_cast<Symbol*>(this));
+}
+
+double Symbol::toNumber(ExecState* exec) const
+{
+    VM& vm = exec->vm();
+    auto scope = DECLARE_THROW_SCOPE(vm);
+    throwTypeError(exec, scope, ASCIILiteral("Cannot convert a symbol to a number"));
+    return 0.0;
+}
+
+void Symbol::destroy(JSCell* cell)
+{
+    static_cast<Symbol*>(cell)->Symbol::~Symbol();
+}
+
+String Symbol::descriptiveString() const
+{
+    return makeString("Symbol(", String(privateName().uid()), ')');
+}
+
+Symbol* Symbol::create(VM& vm)
+{
+    Symbol* symbol = new (NotNull, allocateCell<Symbol>(vm.heap)) Symbol(vm);
+    symbol->finishCreation(vm);
+    return symbol;
+}
+
+Symbol* Symbol::create(ExecState* exec, JSString* description)
+{
+    VM& vm = exec->vm();
+    String desc = description->value(exec);
+    Symbol* symbol = new (NotNull, allocateCell<Symbol>(vm.heap)) Symbol(vm, desc);
+    symbol->finishCreation(vm);
+    return symbol;
+}
+
+Symbol* Symbol::create(VM& vm, SymbolImpl& uid)
+{
+    if (Symbol* symbol = vm.symbolImplToSymbolMap.get(&uid))
+        return symbol;
+
+    Symbol* symbol = new (NotNull, allocateCell<Symbol>(vm.heap)) Symbol(vm, uid);
+    symbol->finishCreation(vm);
+    return symbol;
+}
+
+} // namespace JSC