(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)

SDL_strupr

Convert a string to uppercase.

Header File

Syntax

char* SDL_strupr(char *str);

Remarks

WARNING: Regardless of system locale, this will only convert ASCII values 'A' through 'Z' to uppercase.

This function operates on a null-terminated string of bytes--even if it is malformed UTF-8!--and converts ASCII characters 'a' through 'z' to their uppercase equivalents in-place, returning the original str pointer.

Thread Safety

It is safe to call this function from any thread.

Version

This function is available since SDL 3.0.0.