Add ppq_insert() return codes + fix breadth_first_search_4dir()

1 files changed, 5 insertions, 5 deletions

diff --git a/priority_queue.c b/priority_queue.c
index d4be6e2..6e74b22 100644
--- a/priority_queue.c
+++ b/priority_queue.c
@@ -20,7 +20,7 @@ int ppq_insert(PositionPQ **ppq, Position pos, size_t priority) {
 
     if ((*ppq) == NULL) {
         (*ppq) = ppq_new(pos, priority);
-        return 1;
+        return PPQ_INSERT_NEW;
     }
     
     PositionPQ *n = ppq_new(pos, priority);
@@ -28,7 +28,7 @@ int ppq_insert(PositionPQ **ppq, Position pos, size_t priority) {
     if (start->priority > priority) {
         n->next = start;
         start = n;
-        return 2;
+        return PPQ_INSERT_SUCCESS;
     }
 
     PositionPQ *temp = *ppq;
@@ -36,19 +36,19 @@ int ppq_insert(PositionPQ **ppq, Position pos, size_t priority) {
     while(temp->next != NULL && temp->next->priority <= priority) {
         if (temp->pos.x == pos.x && temp->pos.y == pos.y && temp->priority <= priority) {
             free(n);
-            return 3; /* pos is already in ppq with a fine priority */
+            return PPQ_INSERT_ALREADY;
         }
         temp = temp->next;
     }
     if (temp->pos.x == pos.x && temp->pos.y == pos.y && temp->priority <= priority) {
         free(n);
-        return 3; /* pos is already in ppq with a fine priority */
+        return PPQ_INSERT_ALREADY;
     }
 
     n->next = temp->next;
     temp->next = n;
 
-    return 4;
+    return PPQ_INSERT_SUCCESS;
 }
 
 Position ppq_pop(PositionPQ **ppq) {