added step-based engine snapshots to undo/redo game steps (continued)

[rocksndiamonds.git] / src / libgame / snapshot.c

diff --git a/src/libgame/snapshot.c b/src/libgame/snapshot.c
index f57cb5fa6dd757f8de167541aecaaf77006d54be..1262ee88b2abda4f66173503e70240c2d0f42674 100644 (file)
--- a/src/libgame/snapshot.c
+++ b/src/libgame/snapshot.c
@@ -133,11 +133,12 @@ boolean LoadSnapshotSingle()
   return FALSE;
 }
 
-boolean LoadSnapshotFromList_Older()
+boolean LoadSnapshotFromList_Older(int steps)
 {
   if (snapshot_current->next)
   {
-    snapshot_current = snapshot_current->next;
+    while (snapshot_current->next && steps--)
+      snapshot_current = snapshot_current->next;
 
     LoadSnapshotBuffers(snapshot_current->content);
 
@@ -151,11 +152,12 @@ boolean LoadSnapshotFromList_Older()
   return FALSE;
 }
 
-boolean LoadSnapshotFromList_Newer()
+boolean LoadSnapshotFromList_Newer(int steps)
 {
   if (snapshot_current->prev)
   {
-    snapshot_current = snapshot_current->prev;
+    while (snapshot_current->prev && steps--)
+      snapshot_current = snapshot_current->prev;
 
     LoadSnapshotBuffers(snapshot_current->content);