NAME

SDL_toupper - Convert low-ASCII English letters to uppercase.

SYNOPSIS

#include <SDL3/SDL_stdinc.h>

int SDL_toupper(int x);

DESCRIPTION

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

This function returns the uppercase equivalent of x. If a character cannot be converted, or is already uppercase, this function returns x.

FUNCTION PARAMETERS

x

character value to check.

RETURN VALUE

Returns capitalized version of x, or x if no conversion available.

THREAD SAFETY

It is safe to call this function from any thread.

AVAILABILITY

This function is available since SDL 3.2.0.