Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 194 insertions, 0 deletions

diff --git a/Source/WebKit/win/COMVariantSetter.h b/Source/WebKit/win/COMVariantSetter.h
new file mode 100644
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+++ b/Source/WebKit/win/COMVariantSetter.h
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+/*
+ * Copyright (C) 2007, 2008 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. 
+ */
+
+#ifndef COMVariantSetter_h
+#define COMVariantSetter_h
+
+#include <WebCore/BString.h>
+#include <WebCore/COMPtr.h>
+#include <wtf/Assertions.h>
+#include <wtf/Forward.h>
+
+template<typename T> struct COMVariantSetter {};
+
+template<typename T> struct COMVariantSetterBase
+{
+    static inline VARENUM variantType(const T&)
+    {
+        return COMVariantSetter<T>::VariantType;
+    }
+};
+
+template<> struct COMVariantSetter<WTF::String> : COMVariantSetterBase<WTF::String>
+{
+    static const VARENUM VariantType = VT_BSTR;
+
+    static void setVariant(VARIANT* variant, const WTF::String& value)
+    {
+        ASSERT(V_VT(variant) == VT_EMPTY);
+
+        V_VT(variant) = VariantType;
+        V_BSTR(variant) = WebCore::BString(value).release();
+    }
+};
+
+template<> struct COMVariantSetter<bool> : COMVariantSetterBase<bool>
+{
+    static const VARENUM VariantType = VT_BOOL;
+
+    static void setVariant(VARIANT* variant, bool value)
+    {
+        ASSERT(V_VT(variant) == VT_EMPTY);
+
+        V_VT(variant) = VariantType;
+        V_BOOL(variant) = value;
+    }
+};
+
+template<> struct COMVariantSetter<unsigned long long> : COMVariantSetterBase<unsigned long long>
+{
+    static const VARENUM VariantType = VT_UI8;
+
+    static void setVariant(VARIANT* variant, unsigned long long value)
+    {
+        ASSERT(V_VT(variant) == VT_EMPTY);
+
+        V_VT(variant) = VariantType;
+        V_UI8(variant) = value;
+    }
+};
+
+template<> struct COMVariantSetter<int> : COMVariantSetterBase<int>
+{
+    static const VARENUM VariantType = VT_I4;
+
+    static void setVariant(VARIANT* variant, int value)
+    {
+        ASSERT(V_VT(variant) == VT_EMPTY);
+
+        V_VT(variant) = VariantType;
+        V_I4(variant) = value;
+    }
+};
+
+template<> struct COMVariantSetter<float> : COMVariantSetterBase<float>
+{
+    static const VARENUM VariantType = VT_R4;
+
+    static void setVariant(VARIANT* variant, float value)
+    {
+        ASSERT(V_VT(variant) == VT_EMPTY);
+
+        V_VT(variant) = VariantType;
+        V_R4(variant) = value;
+    }
+};
+
+template<typename T> struct COMVariantSetter<COMPtr<T> > : COMVariantSetterBase<COMPtr<T> >
+{
+    static const VARENUM VariantType = VT_UNKNOWN;
+
+    static void setVariant(VARIANT* variant, const COMPtr<T>& value)
+    {
+        ASSERT(V_VT(variant) == VT_EMPTY);
+
+        V_VT(variant) = VariantType;
+        V_UNKNOWN(variant) = value.get();
+        value->AddRef();
+    }
+};
+
+template<typename COMType, typename UnderlyingType>
+struct COMIUnknownVariantSetter : COMVariantSetterBase<UnderlyingType>
+{
+    static const VARENUM VariantType = VT_UNKNOWN;
+
+    static void setVariant(VARIANT* variant, const UnderlyingType& value)
+    {
+        ASSERT(V_VT(variant) == VT_EMPTY);
+
+        V_VT(variant) = VariantType;
+        V_UNKNOWN(variant) = COMType::createInstance(value);
+    }
+};
+
+class COMVariant {
+public:
+    COMVariant()
+    {
+        ::VariantInit(&m_variant);
+    }
+
+    template<typename UnderlyingType>
+    COMVariant(UnderlyingType value)
+    {
+        ::VariantInit(&m_variant);
+        COMVariantSetter<UnderlyingType>::setVariant(&m_variant, value);
+    }
+
+    ~COMVariant()
+    {
+        ::VariantClear(&m_variant);
+    }
+
+    COMVariant(const COMVariant& other)
+    {
+        ::VariantInit(&m_variant);
+        other.copyTo(&m_variant);
+    }
+
+    COMVariant& operator=(const COMVariant& other)
+    {
+        other.copyTo(&m_variant);
+        return *this;
+    }
+
+    void copyTo(VARIANT* dest) const
+    {
+        ::VariantCopy(dest, const_cast<VARIANT*>(&m_variant));
+    }
+
+    VARENUM variantType() const { return static_cast<VARENUM>(V_VT(&m_variant)); }
+
+private:
+    VARIANT m_variant;
+};
+
+template<> struct COMVariantSetter<COMVariant>
+{
+    static inline VARENUM variantType(const COMVariant& value)
+    {
+        return value.variantType();
+    }
+
+    static void setVariant(VARIANT* variant, const COMVariant& value)
+    {
+        ASSERT(V_VT(variant) == VT_EMPTY);
+
+        value.copyTo(variant);
+    }
+};
+
+#endif // COMVariantSetter