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#ifndef nsCategoryManagerUtils_h__
#define nsCategoryManagerUtils_h__

#include "nsICategoryManager.h"
#include "nsCOMPtr.h"

class NS_COM nsCreateInstanceFromCategory : public nsCOMPtr_helper
{
public:
    nsCreateInstanceFromCategory(const char *aCategory, const char *aEntry,
                                 nsISupports *aOuter, nsresult *aErrorPtr)
        : mCategory(aCategory),
          mEntry(aEntry),
          mErrorPtr(aErrorPtr)
    {
        // nothing else to do;
    }
    virtual nsresult operator()( const nsIID& aIID, void** aInstancePtr) const;
    virtual ~nsCreateInstanceFromCategory() {};

private:
    const char *mCategory;  // Do not free.  This char * is not owned.
    const char *mEntry;     // Do not free.  This char * is not owned.

    nsISupports *mOuter;
    nsresult *mErrorPtr;

};

inline
const nsCreateInstanceFromCategory
do_CreateInstanceFromCategory( const char *aCategory, const char *aEntry,
                               nsresult *aErrorPtr = 0)
{
    return nsCreateInstanceFromCategory(aCategory, aEntry, 0, aErrorPtr);
}

inline
const nsCreateInstanceFromCategory
do_CreateInstanceFromCategory( const char *aCategory, const char *aEntry,
                               nsISupports *aOuter, nsresult *aErrorPtr = 0)
{
    return nsCreateInstanceFromCategory(aCategory, aEntry, aOuter, aErrorPtr);
}


#endif