Provided by: libsdl3-doc_3.2.20+ds-2_all 

NAME
SDL_isprint - Report if a character is "printable".
SYNOPSIS
#include <SDL3/SDL_stdinc.h>
int SDL_isprint(int x);
DESCRIPTION
Be advised that "printable" has a definition that goes back to text terminals from the dawn of computing,
making this a sort of special case function that is not suitable for Unicode (or most any) text
management.
WARNING: Regardless of system locale, this will only treat ASCII values ' ' (0x20) through '~' (0x7E) 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.
Simple Directmedia Layer SDL 3.2.20 SDL_isprint(3)