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

SDL_toupper

Convert low-ASCII English letters to uppercase.

Header File

Defined in <SDL3/SDL_stdinc.h>

Syntax

int SDL_toupper(int x);

Function Parameters

x character value to check.

Return Value

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

Remarks

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.

Thread Safety

It is safe to call this function from any thread.

Version

This function is available since SDL 3.0.0.


CategoryAPI, CategoryAPIFunction, CategoryStdinc


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