Provided by: libsdl3-doc_3.2.4+ds-2_all 
NAME
SDL_iscntrl - Report if a character is a control character.
HEADER FILE
Defined in SDL3/SDL_stdinc.h
SYNOPSIS
#include "SDL3/SDL.h"
int SDL_iscntrl(int x);
DESCRIPTION
WARNING : Regardless of system locale, this will only treat ASCII values 0 through 0x1F, and 0x7F, as
true.
FUNCTION PARAMETERS
x character value to check.
RETURN VALUE
Returns non-zero if x falls within the character class, zero otherwise.
THREAD SAFETY
It is safe to call this function from any thread.
AVAILABILITY
This function is available since SDL 3.2.0.