Alternative to sscanf that makes both Linux and Windows happy

I have a truly ancient punch-card format and a C++ code that reads it using sscanf as follows,

   sscanf(longstr1,"%2d %5ld %1c %10s %2d %12lf %11lf %7lf %2d %7lf %2d %2d %6ld ",
                   &cardnumb,&satrec.satnum,&classification, intldesg, &satrec.epochyr,
                   &satrec.epochdays,&satrec.ndot, &satrec.nddot, &nexp, &satrec.bstar,
                   &ibexp, &numb, &elnum );

Here the first two characters of the string longstr1 comprise an int read into cardnum, the next five comprise an int read into satrec.satnum, and so on. (Those of a certain age will recognize this as a Hollerith format.) The placement of the characters within the string longstr1 never varies.

This works fine, but I have to make it work with both gcc on Linux and Visual Studio C++ (2017) on Windows. VS complains that sscanf is insecure (I suppose it is), and recommends replacing it with sscanf_s, a Microsoft-only function. I need a substitute that makes VS happy, but compiles with gcc on Linux, too.

Is there some secure, and perhaps easy, way to accomplish this?