webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 222 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/replay/EncodedValue.h b/Source/JavaScriptCore/replay/EncodedValue.h
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+++ b/Source/JavaScriptCore/replay/EncodedValue.h
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+/*
+ * Copyright (C) 2013 University of Washington. All rights reserved.
+ * Copyright (C) 2014 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * HOLDER 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.
+ */
+
+#pragma once
+
+#if ENABLE(WEB_REPLAY)
+
+#include "InspectorValues.h"
+#include <wtf/Forward.h>
+#include <wtf/Vector.h>
+
+namespace JSC {
+
+class NondeterministicInputBase;
+template<typename T> struct EncodingTraits;
+
+class EncodedValue final {
+public:
+    explicit EncodedValue(RefPtr<Inspector::InspectorValue>&& value)
+        : m_value(value) { }
+
+    EncodedValue()
+        : m_value(nullptr) { }
+
+    static EncodedValue createObject()
+    {
+        return EncodedValue(Inspector::InspectorObject::create());
+    }
+
+    static EncodedValue createArray()
+    {
+        return EncodedValue(Inspector::InspectorArray::create());
+    }
+
+    static EncodedValue createString(const String& value)
+    {
+        return EncodedValue(Inspector::InspectorValue::create(value));
+    }
+
+    static EncodedValue createString(const char* value)
+    {
+        return EncodedValue(Inspector::InspectorValue::create(value));
+    }
+
+    template<typename T>
+    void put(const String&, const typename EncodingTraits<T>::DecodedType&);
+
+    template<typename T>
+    void append(const typename EncodingTraits<T>::DecodedType&);
+
+    template<typename T> bool get(const String&, typename EncodingTraits<T>::DecodedType&);
+    template<typename T> bool get(const String&, std::unique_ptr<typename EncodingTraits<T>::DecodedType>&);
+
+    template<typename T> T convertTo();
+
+    JS_EXPORT_PRIVATE RefPtr<Inspector::InspectorObject> asObject();
+    JS_EXPORT_PRIVATE RefPtr<Inspector::InspectorArray> asArray();
+
+private:
+    RefPtr<Inspector::InspectorValue> m_value;
+};
+
+template<> JS_EXPORT_PRIVATE bool EncodedValue::convertTo<bool>();
+template<> JS_EXPORT_PRIVATE double EncodedValue::convertTo<double>();
+template<> JS_EXPORT_PRIVATE float EncodedValue::convertTo<float>();
+template<> JS_EXPORT_PRIVATE int32_t EncodedValue::convertTo<int32_t>();
+template<> JS_EXPORT_PRIVATE int64_t EncodedValue::convertTo<int64_t>();
+template<> JS_EXPORT_PRIVATE uint32_t EncodedValue::convertTo<uint32_t>();
+template<> JS_EXPORT_PRIVATE uint64_t EncodedValue::convertTo<uint64_t>();
+template<> JS_EXPORT_PRIVATE String EncodedValue::convertTo<String>();
+
+template<typename T>
+struct EncodingTraits {
+    typedef T DecodedType;
+
+    static EncodedValue encodeValue(const DecodedType&);
+
+    static bool decodeValue(EncodedValue&, DecodedType&);
+    static bool decodeValue(EncodedValue&, std::unique_ptr<DecodedType>&);
+};
+
+template<typename T, size_t inlineCapacity, typename OverflowHandler>
+struct EncodingTraits<Vector<T, inlineCapacity, OverflowHandler>> {
+    typedef Vector<typename EncodingTraits<T>::DecodedType, inlineCapacity, OverflowHandler> DecodedType;
+
+    static EncodedValue encodeValue(const DecodedType& vectorOfValues)
+    {
+        EncodedValue encodedVector = EncodedValue::createArray();
+        for (const typename EncodingTraits<T>::DecodedType& value : vectorOfValues)
+            encodedVector.append<T>(value);
+
+        return encodedVector;
+    }
+
+    static bool decodeValue(EncodedValue& encodedVector, DecodedType& decodedValue)
+    {
+        RefPtr<Inspector::InspectorArray> inspectorArray = encodedVector.asArray();
+        decodedValue = Vector<typename EncodingTraits<T>::DecodedType, inlineCapacity, OverflowHandler>(inspectorArray->length());
+        for (size_t i = 0; i < inspectorArray->length(); ++i) {
+            EncodedValue encodedElement(inspectorArray->get(i));
+            if (!EncodingTraits<T>::decodeValue(encodedElement, decodedValue.at(i)))
+                return false;
+        }
+        return true;
+    }
+};
+
+template<> struct EncodingTraits<EncodedValue> {
+    typedef EncodedValue DecodedType;
+    // We should never attempt to decode or encode an encoded value,
+    // so encodeValue and decodeValue are intentionally omitted here.
+};
+
+// Specialize byte vectors to use base64 encoding.
+template<> struct EncodingTraits<Vector<char>> {
+    typedef Vector<char> DecodedType;
+    static EncodedValue encodeValue(const DecodedType&);
+    static bool decodeValue(EncodedValue&, DecodedType&);
+};
+
+template<typename T>
+struct ScalarEncodingTraits {
+    typedef T DecodedType;
+
+    static JS_EXPORT_PRIVATE EncodedValue encodeValue(const DecodedType& decodedValue);
+    static bool decodeValue(EncodedValue& encodedValue, DecodedType& decodedValue)
+    {
+        decodedValue = encodedValue.convertTo<DecodedType>();
+        return true;
+    }
+};
+
+template<> struct EncodingTraits<bool> : public ScalarEncodingTraits<bool> { };
+template<> struct EncodingTraits<double> : public ScalarEncodingTraits<double> { };
+template<> struct EncodingTraits<float> : public ScalarEncodingTraits<float> { };
+template<> struct EncodingTraits<int32_t> : public ScalarEncodingTraits<int32_t> { };
+template<> struct EncodingTraits<int64_t> : public ScalarEncodingTraits<int64_t> { };
+template<> struct EncodingTraits<uint32_t> : public ScalarEncodingTraits<uint32_t> { };
+template<> struct EncodingTraits<uint64_t> : public ScalarEncodingTraits<uint64_t> { };
+
+template<> struct EncodingTraits<String> : public ScalarEncodingTraits<String> {
+    static EncodedValue encodeValue(const String& value)
+    {
+        return EncodedValue::createString(value);
+    }
+};
+
+// Base cases for loading and storing values.
+template<> JS_EXPORT_PRIVATE
+void EncodedValue::put<EncodedValue>(const String& key, const typename EncodingTraits<EncodedValue>::DecodedType&);
+
+template<> JS_EXPORT_PRIVATE
+void EncodedValue::append<EncodedValue>(const typename EncodingTraits<EncodedValue>::DecodedType&);
+
+template<> JS_EXPORT_PRIVATE
+bool EncodedValue::get<EncodedValue>(const String& key, typename EncodingTraits<EncodedValue>::DecodedType&);
+
+// Load and store types with an accompanying EncodingTraits implementation.
+template<typename T>
+void EncodedValue::put(const String& key, const typename EncodingTraits<T>::DecodedType& value)
+{
+    EncodedValue encodedValue = EncodingTraits<T>::encodeValue(value);
+    put<EncodedValue>(key, encodedValue);
+}
+
+template<typename T>
+void EncodedValue::append(const typename EncodingTraits<T>::DecodedType& value)
+{
+    EncodedValue encodedValue = EncodingTraits<T>::encodeValue(value);
+    append<EncodedValue>(encodedValue);
+}
+
+template<typename T>
+bool EncodedValue::get(const String& key, typename EncodingTraits<T>::DecodedType& decodedValue)
+{
+    EncodedValue encodedValue;
+    if (!get<EncodedValue>(key, encodedValue))
+        return false;
+
+    return EncodingTraits<T>::decodeValue(encodedValue, decodedValue);
+}
+
+template<typename T>
+bool EncodedValue::get(const String& key, std::unique_ptr<typename EncodingTraits<T>::DecodedType>& decodedValue)
+{
+    EncodedValue encodedValue;
+    if (!get<EncodedValue>(key, encodedValue))
+        return false;
+
+    return EncodingTraits<T>::decodeValue(encodedValue, decodedValue);
+}
+
+} // namespace JSC
+
+using JSC::EncodedValue;
+using JSC::EncodingTraits;
+
+#endif // ENABLE(WEB_REPLAY)