FIX: Error Using _ttoi64 with Non-Unicode Applications

ID: Q168433

The information in this article applies to:

Microsoft Visual C++, 32-bit Editions, 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
Version : winnt:5.0
Platform : winnt
Issue type : kbbug