secury swprintf without crt

[ig3v10@gmail.com]

Hi ,
i have advice on the folloing code:


wchar_t* day = new wchar_t [11];
swprintf(day,L" %4d-%2d-%2d",yy,mm,dd) ;

how to make sure that my 'day' didn't get string bigger then 20 chars?

found:
swprintf_s(day, size,L"%4d-%2d-%2d",yy,mm,dd) ;
but it requires crt

any suggestions?

~igRek