input module

CMakeLists.txt

@@ -12,6 +12,7 @@ include_directories(inc)
 set(SOURCES
 	src/main.c
 	src/draw.c
+	src/input.c
 	src/player.c
 )
 

inc/input.h

@@ -0,0 +1,16 @@
+#pragma once
+
+enum Key { K_LEFT, K_RIGHT, K_UP, K_DOWN, K_JUMP, K_EXIT, K_COUNT };
+enum KeyState { KS_UP, KS_DOWN, KS_PRESS };
+
+struct Input {
+	enum Key keys[K_COUNT];
+	enum KeyState states[K_COUNT];
+};
+
+void input_init(void);
+void input_update(void);
+
+int input_down(enum Key);
+int input_pressed(enum Key);
+int input_up(enum Key);

src/input.c

@@ -0,0 +1,48 @@
+#include "input.h"
+#include <gint/keyboard.h>
+
+static struct Input input;
+static const int default_map[K_COUNT] = {KEY_LEFT, KEY_RIGHT, KEY_UP,
+                                         KEY_DOWN, KEY_SHIFT, KEY_EXIT};
+
+void
+input_init(void)
+{
+
+	int i = K_COUNT;
+	while (i-- > 0) {
+		input.keys[i] = default_map[i];
+		input.states[i] = KS_UP;
+	}
+}
+
+void
+input_update(void)
+{
+	int i = K_COUNT;
+	clearevents();
+	while (i-- > 0) {
+		const int kdown = keydown(input.keys[i]);
+		input.states[i] = (input.states[i] == KS_UP)
+		                      ? (kdown ? KS_PRESS : KS_UP)
+		                      : (kdown ? KS_DOWN : KS_UP);
+	}
+}
+
+int
+input_down(enum Key k)
+{
+	return input.states[k] != KS_UP;
+}
+
+int
+input_pressed(enum Key k)
+{
+	return input.states[k] == KS_PRESS;
+}
+
+int
+input_up(enum Key k)
+{
+	return input.states[k] == KS_UP;
+}

src/main.c

@@ -1,6 +1,6 @@
+#include "input.h"
 #include "player.h"
 #include <gint/display.h>
-#include <gint/keyboard.h>
 
 static Player player;
 
@@ -18,7 +18,7 @@ main(void)
 	do {
 		update();
 		draw();
-	} while (!keydown(KEY_EXIT));
+	} while (input_up(K_EXIT));
 
 	deinit();
 	return 0;
@@ -27,6 +27,7 @@ main(void)
 static void
 init(void)
 {
+	input_init();
 	player_init(&player);
 }
 
@@ -38,7 +39,7 @@ deinit(void)
 static void
 update(void)
 {
-	clearevents();
+	input_update();
 	player_update(&player);
 }