eventloop.c

#include <sdl.h>

struct _EventFuncs {
    void (*on_keydown) (char key, void *user_data);
    void (*on_loop) (void *user_data);
};

typedef struct _EventFuncs EventFucs;

void event_loop(EventFuncs *event_funcs, void *user_data) {
    /* Given a function pointer to call on each new keypress, catch keypresses
     * and pass them to it.
     *
     * TODO: a callback on quit. */
    SDL_Event event;
    int cont = 1;
    while (cont) {
        while (SDL_PollEvent(&event)) {
            switch(event.type){
                case SDL_KEYDOWN:
                    event_funcs->on_keydown(event.key.keysym.sym, user_data);
                    break;
                case SDL_QUIT:
                    cont = 0;
                    puts("Quitting.");
                    break;
            }
        }
        event_funcs->on_loop(user_data);
    }
}