C++ non null terminated char array outputting

Question

I was trying to output a not null terminated char array to a file.

Actual thing is, I am receiving packets and then printing their fields.

Now as these field

Answer 1

If you don't care about the last byte, you can just

buffer[buffersize-1] = 0;

and then feed buffer to whatever string function you want. If it is shorter, everything will run to the null terminator that already exists, and if there was no terminator it will run to the one you just created.

And it's fast :)