4.44 beta

CPP/7zip/UI/Common/HandlerLoader.h

@@ -0,0 +1,38 @@
+// HandlerLoader.h
+
+#ifndef __HANDLERLOADER_H
+#define __HANDLERLOADER_H
+
+#include "../../ICoder.h"
+#include "Windows/DLL.h"
+
+typedef UInt32 (WINAPI * CreateObjectFunc)(
+    const GUID *clsID, 
+    const GUID *interfaceID, 
+    void **outObject);
+
+class CHandlerLoader: public NWindows::NDLL::CLibrary
+{
+public:
+  HRESULT CreateHandler(LPCWSTR filepath, REFGUID clsID, 
+      void **archive, bool outHandler)
+  {
+    if (!Load(filepath))
+      return GetLastError();
+    CreateObjectFunc createObject = (CreateObjectFunc)
+        GetProcAddress("CreateObject");
+    if (createObject == NULL)
+    {
+      HRESULT res = ::GetLastError();
+      Free();
+      return res;
+    }
+    HRESULT res = createObject(&clsID, 
+        outHandler ? &IID_IOutArchive : &IID_IInArchive, (void **)archive);
+    if (res != 0)
+      Free();
+    return res;
+  }
+};
+
+#endif