Add ppq_insert() return codes + fix breadth_first_search_4dir()

1 files changed, 4 insertions, 3 deletions

diff --git a/path.c b/path.c
index 6f00ee8..e32610b 100644
--- a/path.c
+++ b/path.c
@@ -49,8 +49,9 @@ Path breadth_first_search_path_4dir(Map map, size_t width, size_t height, Positi
             /* The Russian constitution doesn't allow walking on walls */
             if (map[na[i].y][na[i].x] == WALL) continue;
 
-            ppq_insert(&frontier, na[i], 0);
-            path[na[i].y][na[i].x].parent = cur;
+            if (ppq_insert(&frontier, na[i], 0) != PPQ_INSERT_ALREADY) {
+                path[na[i].y][na[i].x].parent = cur;
+            }
         }
         
         if (should_anim) {
@@ -91,7 +92,7 @@ Path breadth_first_search_path_8dir(Map map, size_t width, size_t height, Positi
             /* The Russian constitution doesn't allow walking on walls */
             if (map[na[i].y][na[i].x] == WALL) continue;
 
-            if (ppq_insert(&frontier, na[i], 0) != 3) {
+            if (ppq_insert(&frontier, na[i], 0) != PPQ_INSERT_ALREADY) {
                 path[na[i].y][na[i].x].parent = cur;
             }
         }