1 files changed, 16 insertions, 0 deletions
diff --git a/lineset.c b/lineset.c
index 595ccba..9e3cc71 100644
--- a/lineset.c
+++ b/lineset.c
@@ -5,6 +5,22 @@
 #include <string.h>
 #include "gramscii.h"
 
+/** extern declarations **/
+
+extern lineset_t screen; /* what is visualised */
+extern lineset_t cutbuf; /* cut/paste buffer */
+extern lineset_t *undo;  /* undo list */
+
+extern int undo_sz;/* allocated size of undo list*/
+extern int undo_cur;/* undo position */
+extern int undo_lst;/* last valid undo position */
+
+extern int WIDTH, HEIGHT;
+
+extern char modified; /* set to 1 if screen modified since last save */
+
+/****/
+
 static int LONG_STEP;
 
 /* line_t and lineset_t management */