SDL_INVALID_UNICODE_CODEPOINT - Man Page

#include <SDL3/SDL_stdinc.h>

#define SDL_INVALID_UNICODE_CODEPOINT 0xFFFD

SDL_StepUTF8() and SDL_StepBackUTF8() report this codepoint when they encounter a UTF-8 string with encoding errors.

This tends to render as something like a question mark in most places.

This macro is available since SDL 3.2.0.

SDL_StepBackUTF8(3), SDL_StepUTF8(3)