From 016c9daf3e46d08204f24b6da7d7820c64414a34 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Mon, 09 Aug 2021 01:07:40 -0400
Subject: char: Add a step method

---
(limited to 'src')

diff --git a/src/char/char.c b/src/char/char.c
index 97c3cc4..05ca03a 100644
--- a/src/char/char.c
+++ b/src/char/char.c
@@ -59,7 +59,6 @@ mf_char_get_vector(struct mf_char *c, int *x, int *y, int *travel,
 int
 mf_char_update(struct mf_char *c)
 {
-	int stepped = SDL_FALSE;
 	int dx;
 	int dy;
 
@@ -70,7 +69,9 @@ mf_char_update(struct mf_char *c)
 			/* Reached next cell */
 			c->cur_x = c->new_x;
 			c->cur_y = c->new_y;
-			stepped = SDL_TRUE;
+			if (c->step(c) < 0) {
+				return -1;
+			}
 			if (c->cur_dir == c->new_dir) {
 				/* Want to continue straight */
 				c->travel -= c->cell_width;
@@ -113,13 +114,11 @@ mf_char_update(struct mf_char *c)
 			c->new_x = c->cur_x + dx;
 			c->new_y = c->cur_y + dy;
 			c->travel += c->speed;
-		} else {
-			stepped = SDL_TRUE;
 		}
 	}
 
  end:
-	return c->update(c, stepped);
+	return c->update(c);
 }
 
 int
diff --git a/src/char/char.h b/src/char/char.h
index ad0a74d..516974d 100644
--- a/src/char/char.h
+++ b/src/char/char.h
@@ -51,7 +51,8 @@ struct mf_char {
 	SDL_Color           head_color;
 	SDL_Color           smil_color;
 	SDL_Color           eyes_color;
-	int               (*update)(struct mf_char *, int);
+	int               (*update)(struct mf_char *);
+	int               (*step)(struct mf_char *);
 	int               (*render)(struct mf_char *, SDL_Renderer *);
 	void              (*destroy)(struct mf_char *);
 };
@@ -66,6 +67,7 @@ mf_char_new(size_t size);
 			return NULL; \
 		}; \
 		c->update  = &_mf_##name##_update; \
+		c->step    = &_mf_##name##_step; \
 		c->render  = &_mf_##name##_render; \
 		c->destroy = &_mf_##name##_destroy; \
 		t_c = (struct mf_##name *) c; \
diff --git a/src/char/enemy.c b/src/char/enemy.c
index 3907cf6..edfd5c3 100644
--- a/src/char/enemy.c
+++ b/src/char/enemy.c
@@ -29,7 +29,13 @@ struct mf_enemy {
 };
 
 static int
-_mf_enemy_update(struct mf_char *c, int stepped)
+_mf_enemy_update(struct mf_char *c __attribute__((__unused__)))
+{
+	return 0;
+}
+
+static int
+_mf_enemy_step(struct mf_char *c)
 {
 	enum _mf_char_dir dirs[4] = {MF_CHAR_DIR_U_, MF_CHAR_DIR_D_,
 	                             MF_CHAR_DIR_L_, MF_CHAR_DIR_R_};
@@ -39,10 +45,6 @@ _mf_enemy_update(struct mf_char *c, int stepped)
 	int               dx;
 	int               dy;
 
-	if (stepped == SDL_FALSE) {
-		return 0;
-	}
-
 	/* Shuffle directions */
 	for (i = 0; i < 4; ++i) {
 		j = rand() / (RAND_MAX / (i+1));
@@ -125,7 +127,7 @@ mf_enemy_new(struct mf_maze *maze, int cell_width, int maze_size)
 	}
 
 	c->cur_dir = MF_CHAR_DIR_N_;
-	_mf_enemy_update(c, SDL_TRUE);
+	_mf_enemy_step(c);
 	c->cur_dir = c->new_dir;
 
 	return c;
diff --git a/src/char/player.c b/src/char/player.c
index 8f44aa2..7d20aad 100644
--- a/src/char/player.c
+++ b/src/char/player.c
@@ -28,7 +28,7 @@ struct mf_player {
 };
 
 static int
-_mf_player_update(struct mf_char *c, int stepped __attribute__((__unused__)))
+_mf_player_update(struct mf_char *c)
 {
 	int dx;
 	int dy;
@@ -55,6 +55,12 @@ _mf_player_update(struct mf_char *c, int stepped __attribute__((__unused__)))
 }
 
 static int
+_mf_player_step(struct mf_char *c __attribute__((__unused__)))
+{
+	return 0;
+}
+
+static int
 _mf_player_render(struct mf_char *c __attribute__((__unused__)),
 		SDL_Renderer *renderer __attribute__((__unused__)))
 {
--
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