Single thread + inputs

src/input.c

@@ -0,0 +1,46 @@
+#include "input.h"
+#include <SDL2/SDL_scancode.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+
+keyEvent_t * events[SDL_NUM_SCANCODES];
+int event_counts[SDL_NUM_SCANCODES];
+
+void input_init(void) {
+    memset(events, 0, SDL_NUM_SCANCODES * sizeof(keyEvent_t *));
+    memset(event_counts, 0, SDL_NUM_SCANCODES * sizeof(int));
+}
+
+void input_poll(SDL_Scancode code) {
+    printf("Scancode: %d\n", code);
+    keyEvent_t * handlers = events[code];
+    for(int i = 0; i < event_counts[code]; i++) {
+        handlers[i]();
+    }
+}
+
+
+void input_listen(SDL_Scancode code, keyEvent_t handler) {
+    event_counts[code]++;
+    events[code] = (keyEvent_t *)realloc(events[code], event_counts[code] * sizeof(keyEvent_t));
+    events[code][event_counts[code] - 1] = handler;
+}
+
+void input_removeListener(SDL_Scancode code, keyEvent_t handler) {
+    bool found = false;
+    for(int i = 0; i < event_counts[code]; i++) {
+        if(events[code][i] == handler) {
+            found = true;
+            break;
+        }
+        if(found) {
+            if(i == event_counts[code] - 1) {
+                break;
+            }
+            events[code][i] = events[code][i + 1];
+        }
+    }
+    event_counts[code]--;
+}