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Q168433: FIX: Error Using _ttoi64 with Non-Unicode Applications

Article: Q168433
Product(s): Microsoft C Compiler
Version(s): winnt:5.0
Operating System(s): 
Keyword(s): kbVC500bug kbVC600fixkbbuglist
Last Modified: 07-MAY-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Visual C++, 32-bit Enterprise Edition, version 5.0 
- Microsoft Visual C++, 32-bit Professional Edition, version 5.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

_ttoi64 is incorrectly defined in TCHAR.H in Visual C/C++ 5.0.

RESOLUTION
==========

Undefine _ttoi64 and redefine it correctly. For the complete solution, see the
MORE INFORMATION section of this article.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. This problem was corrected in Visual C++ version 6.0
for Windows.

MORE INFORMATION
================

_ttoi64 is a define that substitutes _atoi64 (if _UNICODE is not defined) or
_wtoi64 if _UNICODE is defined. On line 481 of TCHAR.H is the following:

     #define _ttoi64     atoi64

this should be:

     #define _ttoi64     _atoi64

You may add the following code to your source file to correct the problem:

     // _ttoi64 is incorrectly defined in TCHAR.H, so you need to undefine
     // it and redefine it correctly to avoid a compile error when
     // building a non-Unicode version of your application.

        #ifdef _UNICODE
          #ifdef  _ttoi64
            #undef  _ttoi64
            #define _ttoi64 _wtoi64
          #endif
        #else
          #ifdef  _ttoi64
            #undef  _ttoi64
            #define _ttoi64 _atoi64
          #endif
        #endif

Additional query words:

======================================================================
Keywords          : kbVC500bug kbVC600fix kbbuglist
Technology        : kbVCsearch kbAudDeveloper kbVC500 kbVC32bitSearch kbVC500Search
Version           : winnt:5.0
Issue type        : kbbug
Solution Type     : kbfix

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