webkitgtk-2.10.2webkitgtk-2.10.2

1 files changed, 153 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/runtime/JSPropertyNameIterator.cpp b/Source/JavaScriptCore/runtime/JSPropertyNameIterator.cpp
new file mode 100644
index 000000000..a9749a524
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+++ b/Source/JavaScriptCore/runtime/JSPropertyNameIterator.cpp
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+/*
+ * Copyright (C) 2015 Apple, Inc. All rights reserved.
+ *
+ * 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. ``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
+ * 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 "JSPropertyNameIterator.h"
+
+#include "IdentifierInlines.h"
+#include "IteratorOperations.h"
+#include "JSCJSValueInlines.h"
+#include "JSCellInlines.h"
+#include "JSPropertyNameEnumerator.h"
+#include "SlotVisitorInlines.h"
+#include "StructureInlines.h"
+
+namespace JSC {
+
+static EncodedJSValue JSC_HOST_CALL propertyNameIteratorFuncNext(ExecState*);
+
+const ClassInfo JSPropertyNameIterator::s_info = { "PropertyName Iterator", &Base::s_info, 0, CREATE_METHOD_TABLE(JSPropertyNameIterator) };
+
+JSPropertyNameIterator::JSPropertyNameIterator(VM& vm, Structure* structure, JSObject* object, JSPropertyNameEnumerator* enumerator)
+    : Base(vm, structure)
+    , m_iteratedObject(vm, this, object)
+    , m_propertyNameEnumerator(vm, this, enumerator)
+    , m_enumerationPhase(EnumerationPhase::IndexedNames)
+    , m_cursor(0)
+{
+}
+
+JSPropertyNameIterator* JSPropertyNameIterator::clone(ExecState* exec)
+{
+    auto iterator = JSPropertyNameIterator::create(exec, exec->callee()->globalObject()->propertyNameIteratorStructure(), m_iteratedObject.get(), m_propertyNameEnumerator.get());
+    iterator->m_enumerationPhase = m_enumerationPhase;
+    iterator->m_cursor = m_cursor;
+    return iterator;
+}
+
+JSPropertyNameIterator* JSPropertyNameIterator::create(ExecState* exec, Structure* structure, JSObject* iteratedObject)
+{
+    return JSPropertyNameIterator::create(exec, structure, iteratedObject, propertyNameEnumerator(exec, iteratedObject));
+}
+
+JSPropertyNameIterator* JSPropertyNameIterator::create(ExecState* exec, Structure* structure, JSObject* iteratedObject, JSPropertyNameEnumerator* enumerator)
+{
+    VM& vm = exec->vm();
+    JSPropertyNameIterator* instance = new (NotNull, allocateCell<JSPropertyNameIterator>(vm.heap)) JSPropertyNameIterator(vm, structure, iteratedObject, enumerator);
+    instance->finishCreation(vm, structure->globalObject());
+    return instance;
+}
+
+void JSPropertyNameIterator::finishCreation(VM& vm, JSGlobalObject* globalObject)
+{
+    Base::finishCreation(vm);
+    ASSERT(inherits(info()));
+    JSC_NATIVE_FUNCTION(vm.propertyNames->next, propertyNameIteratorFuncNext, DontEnum, 0);
+}
+
+void JSPropertyNameIterator::visitChildren(JSCell* cell, SlotVisitor& visitor)
+{
+    JSPropertyNameIterator* thisObject = jsCast<JSPropertyNameIterator*>(cell);
+    ASSERT_GC_OBJECT_INHERITS(thisObject, info());
+    Base::visitChildren(thisObject, visitor);
+    visitor.append(&thisObject->m_iteratedObject);
+    visitor.append(&thisObject->m_propertyNameEnumerator);
+}
+
+bool JSPropertyNameIterator::next(ExecState* exec, JSValue& output)
+{
+    if (m_enumerationPhase == EnumerationPhase::IndexedNames) {
+        for (; m_cursor < m_propertyNameEnumerator->indexedLength();) {
+            uint32_t index = m_cursor++;
+            if (m_iteratedObject->hasProperty(exec, index)) {
+                output = jsString(exec, Identifier::from(exec, index).string());
+                return true;
+            }
+        }
+        m_cursor = 0;
+        m_enumerationPhase = EnumerationPhase::StructureNames;
+    }
+
+    if (m_enumerationPhase == EnumerationPhase::StructureNames) {
+        for (; m_cursor < m_propertyNameEnumerator->endStructurePropertyIndex();) {
+            uint32_t index = m_cursor++;
+            JSString* propertyName = m_propertyNameEnumerator->propertyNameAtIndex(index);
+            ASSERT(propertyName);
+            if (m_iteratedObject->structure(exec->vm())->id() == m_propertyNameEnumerator->cachedStructureID()) {
+                output = propertyName;
+                return true;
+            }
+
+            if (m_iteratedObject->hasProperty(exec, propertyName->toIdentifier(exec))) {
+                output = propertyName;
+                return true;
+            }
+        }
+        ASSERT(m_cursor >= m_propertyNameEnumerator->endStructurePropertyIndex());
+        // Use the same m_cursor in the GenericNames phase.
+        m_enumerationPhase = EnumerationPhase::GenericNames;
+    }
+
+    if (m_enumerationPhase == EnumerationPhase::GenericNames) {
+        for (; m_cursor < m_propertyNameEnumerator->endGenericPropertyIndex();) {
+            uint32_t index = m_cursor++;
+            JSString* propertyName = m_propertyNameEnumerator->propertyNameAtIndex(index);
+            ASSERT(propertyName);
+            if (m_iteratedObject->hasProperty(exec, propertyName->toIdentifier(exec))) {
+                output = propertyName;
+                return true;
+            }
+        }
+        m_enumerationPhase = EnumerationPhase::Done;
+    }
+
+    return false;
+}
+
+// ------------------------------ PropertyNameIterator Functions ----------------------------
+
+EncodedJSValue JSC_HOST_CALL propertyNameIteratorFuncNext(ExecState* exec)
+{
+    JSPropertyNameIterator* iterator = jsDynamicCast<JSPropertyNameIterator*>(exec->thisValue());
+    if (!iterator)
+        return JSValue::encode(throwTypeError(exec, ASCIILiteral("Cannot call PropertyNameIterator.next() on a non-PropertyNameIterator object")));
+
+    JSValue result;
+    if (iterator->next(exec, result))
+        return JSValue::encode(createIteratorResultObject(exec, result, false));
+    return JSValue::encode(createIteratorResultObject(exec, jsUndefined(), true));
+}
+
+} // namespace JSC