Fuck off 8200.
There's not a government that's the head of the snake. Israel is saved for last because of a deal they made, that they think others don't know about.
>https://forgetcode.com/c/567-change-string-to-upper-case-without-strupr
Always avoid making library calls if you can directly code the function. It's faster. And the most secure program is one that relies on no external libraries whatsoever. That means your risk vector is kernel-only.