SDL_isalnum - Man Page

#include <SDL3/SDL_stdinc.h>

int SDL_isalnum(int x);

WARNING: Regardless of system locale, this will only treat ASCII values for English 'a-z', 'A-Z', and '0-9' as true.

x

character value to check.

Returns non-zero if x falls within the character class, zero otherwise.

It is safe to call this function from any thread.

This function is available since SDL 3.2.0.

SDL_ispunct(3).