Toolkit Pro - HashKey() in XTPMacros.h causes problems

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HashKey() in XTPMacros.h causes problems

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Category: Codejock Products
Forum Name: Toolkit Pro
Forum Description: Topics Related to Codejock Toolkit Pro
URL: http://forum.codejock.com/forum_posts.asp?TID=21619
Printed Date: 18 June 2025 at 4:07am
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Topic: HashKey() in XTPMacros.h causes problems

Posted By: scotia
Subject: HashKey() in XTPMacros.h causes problems
Date Posted: 02 May 2013 at 12:00am

HashKey() in XTPMacros.h may override MFC's HashKey() but it generates hash value in a different way from MFC. That means you cannot pass a CMap created in a DLL linked with ToolKitPro to the other DLL not linked with ToolKitPro. I don't know why we need the HashKey() in XTPMacros.h while there is one in MFC. Please remove the HashKey() in XTPMacros.h.

In XTPMacros.h:

template<> AFX_INLINE UINT AFXAPI HashKey<UINT_PTR>(UINT_PTR key) {

return (DWORD)(((DWORD_PTR)key)>>4);

}

In MFC:

AFX_INLINE UINT AFXAPI HashKey(ARG_KEY key)

{

// (algorithm copied from STL hash in xfunctional)

ldiv_t HashVal = ldiv((long)(ARG_KEY)key, 127773);

HashVal.rem = 16807 * HashVal.rem - 2836 * HashVal.quot;

if (HashVal.rem < 0)

HashVal.rem += 2147483647;

return ((UINT)HashVal.rem);

}