_vsnwprintf .NET 2003 bug?

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rm - 13 May 2004 10:36 GMT

try to write code like thi

WCHAR w[4]
w[0]=L'?'
w[1]=L'?'
w[2]=L'?'
w[3]=L'?'

int iret= _vsnwprintf(w,L"1234",4,NULL/*or any correct address*/)

iret will be equeal 4 - however _vsnwprintf doesn't write terminating null-char to the end of the string
is it correct? may be it must return -1 = too small buffer? ( seems VC6 RUNTIME do exactly this

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LarryWest42 - 13 May 2004 21:36 GMT

Tragically, none of the *sn*printf() functions are guaranteed to null-terminate

Microsoft does provide StrSafe.h which has a bunch of functions and such to help with this kind of problem. Hopefully someday these (or equivalents) will be in the C/C++ standard libraries

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnsecure/html/s
trsafe.as

Larr

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