sdlToupper function
extern DECLSPEC int SDLCALL SDL_toupper(int x)
Implementation
int sdlToupper(int x) {
final sdlToupperLookupFunction =
libSdl2.lookupFunction<Int32 Function(Int32 x), int Function(int x)>(
'SDL_toupper');
return sdlToupperLookupFunction(x);
}