R – How come XDrawString doesn’t take “const char *”


looking at the declaration for XDrawString from X11, it is

int XDrawString(Display *display, Drawable d, GC gc,
                int x, int y, char *string, int length);

How come the 6th argument is type "char *" instead of "const char *"? Does drawing the string require modifying it? I've seen lots of examples where people pass in constant strings; is that unsafe?

Best Solution

Either because the function has been around since before const or because those who designed the API have troubles keeping up.