1 files changed, 147 insertions, 0 deletions
diff --git a/CPP/7zip/Archive/Common/CoderLoader.h b/CPP/7zip/Archive/Common/CoderLoader.h
new file mode 100755
index 00000000..02322d8c
--- /dev/null
+++ b/CPP/7zip/Archive/Common/CoderLoader.h
@@ -0,0 +1,147 @@
+// CoderLoader.h
+
+#ifndef __CODERLOADER_H
+#define __CODERLOADER_H
+
+#include "../../../Common/String.h"
+#include "../../../Common/MyCom.h"
+#include "../../../Windows/DLL.h"
+#include "../../ICoder.h"
+
+typedef UInt32 (WINAPI * CreateObjectPointer)(
+    const GUID *clsID, 
+    const GUID *interfaceID, 
+    void **outObject);
+
+class CCoderLibrary: public NWindows::NDLL::CLibrary 
+{
+public:
+  HRESULT CreateObject(REFGUID clsID, REFGUID iid, void **obj)
+  {
+    CreateObjectPointer createObject = (CreateObjectPointer)
+      GetProcAddress("CreateObject");
+    if (createObject == NULL)
+      return GetLastError();
+    return createObject(&clsID, &iid, obj);
+  }
+
+  HRESULT CreateFilter(REFGUID clsID, ICompressFilter **filter)
+  {
+    return CreateObject(clsID, IID_ICompressFilter, (void **)filter);
+  }
+
+  HRESULT CreateCoder(REFGUID clsID, ICompressCoder **coder)
+  {
+    return CreateObject(clsID, IID_ICompressCoder, (void **)coder);
+  }
+
+  HRESULT CreateCoderSpec(REFGUID clsID, ICompressCoder **coder);
+  
+  HRESULT LoadAndCreateFilter(LPCTSTR filePath, REFGUID clsID, ICompressFilter **filter)
+  {
+    CCoderLibrary libTemp;
+    if (!libTemp.Load(filePath))
+      return GetLastError();
+    RINOK(libTemp.CreateFilter(clsID, filter));
+    Attach(libTemp.Detach());
+    return S_OK;
+  }
+  
+
+  HRESULT LoadAndCreateCoder(LPCTSTR filePath, REFGUID clsID, ICompressCoder **coder)
+  {
+    CCoderLibrary libTemp;
+    if (!libTemp.Load(filePath))
+      return GetLastError();
+    RINOK(libTemp.CreateCoder(clsID, coder));
+    Attach(libTemp.Detach());
+    return S_OK;
+  }
+
+  HRESULT LoadAndCreateCoderSpec(LPCTSTR filePath, REFGUID clsID, ICompressCoder **coder);
+  HRESULT CreateCoder2(REFGUID clsID, ICompressCoder2 **coder)
+  {
+    CreateObjectPointer createObject = (CreateObjectPointer)
+        GetProcAddress("CreateObject");
+    if (createObject == NULL)
+      return GetLastError();
+    return createObject(&clsID, &IID_ICompressCoder2, (void **)coder);
+  }
+  HRESULT LoadAndCreateCoder2(LPCTSTR filePath, REFGUID clsID, ICompressCoder2 **coder)
+  {
+    CCoderLibrary libTemp;
+    if (!libTemp.Load(filePath))
+      return GetLastError();
+    RINOK(libTemp.CreateCoder2(clsID, coder));
+    Attach(libTemp.Detach());
+    return S_OK;
+  }
+};
+
+
+class CCoderLibraries
+{
+  struct CPathToLibraryPair
+  {
+    CSysString Path;
+    CCoderLibrary Libary;
+  };
+  CObjectVector<CPathToLibraryPair> Pairs;
+public:
+  int FindPath(LPCTSTR filePath)
+  {
+    for (int i = 0; i < Pairs.Size(); i++)
+      if (Pairs[i].Path.CompareNoCase(filePath) == 0)
+        return i;
+    return -1;
+  }
+
+  HRESULT CreateCoder(LPCTSTR filePath, REFGUID clsID, ICompressCoder **coder)
+  {
+    int index = FindPath(filePath);
+    if (index < 0)
+    {
+      CPathToLibraryPair pair;
+      RINOK(pair.Libary.LoadAndCreateCoder(filePath, clsID, coder));
+      pair.Path = filePath;
+      Pairs.Add(pair);
+      pair.Libary.Detach();
+      return S_OK;
+    }
+    return Pairs[index].Libary.CreateCoder(clsID, coder);
+  }
+
+  HRESULT CreateCoderSpec(LPCTSTR filePath, REFGUID clsID, ICompressCoder **coder)
+  {
+    int index = FindPath(filePath);
+    if (index < 0)
+    {
+      CPathToLibraryPair pair;
+      RINOK(pair.Libary.LoadAndCreateCoderSpec(filePath, clsID, coder));
+      pair.Path = filePath;
+      Pairs.Add(pair);
+      pair.Libary.Detach();
+      return S_OK;
+    }
+    return Pairs[index].Libary.CreateCoderSpec(clsID, coder);
+  }
+
+  HRESULT CreateCoder2(LPCTSTR filePath, REFGUID clsID, ICompressCoder2 **coder)
+  {
+    int index = FindPath(filePath);
+    if (index < 0)
+    {
+      CPathToLibraryPair pair;
+      RINOK(pair.Libary.LoadAndCreateCoder2(filePath, clsID, coder));
+      pair.Path = filePath;
+      Pairs.Add(pair);
+      pair.Libary.Detach();
+      return S_OK;
+    }
+    return Pairs[index].Libary.CreateCoder2(clsID, coder);
+  }
+};
+
+
+#endif
+