From 4df889ef1462dcacddf899185c9bc99d1f19a60a Mon Sep 17 00:00:00 2001
From: bostic <bostic>
Date: Thu, 23 Dec 1993 10:46:49 +0000
Subject: [PATCH] if the command deletes lines, sp->lno can go to 0, which is,
 uh, bad

---
 ex/ex_global.c | 36 +++++++++++++++++++++---------------
 1 file changed, 21 insertions(+), 15 deletions(-)

diff --git a/ex/ex_global.c b/ex/ex_global.c
index 83f80844..0042bdd3 100644
--- a/ex/ex_global.c
+++ b/ex/ex_global.c
@@ -6,7 +6,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "$Id: ex_global.c,v 8.25 1993/12/09 19:42:40 bostic Exp $ (Berkeley) $Date: 1993/12/09 19:42:40 $";
+static char sccsid[] = "$Id: ex_global.c,v 8.26 1993/12/23 10:46:49 bostic Exp $ (Berkeley) $Date: 1993/12/23 10:46:49 $";
 #endif /* not lint */
 
 #include <sys/types.h>
@@ -228,31 +228,37 @@ global(sp, ep, cmdp, cmd)
 			goto err;
 
 		sp->lno = lno;
+
+		/*
+		 * The cursor moves to last line sent to the command, by
+		 * default.  If the command created new lines, it moves
+		 * to the last of the new lines, if it deleted lines, it
+		 * moves to the line after the deleted line.
+		 */
 		if (ex_cmd(sp, ep, cb, clen))
 			goto err;
-
-		/* Someone's unhappy, time to stop. */
-		if (F_ISSET(sp, S_INTERRUPTED)) {
-			msgq(sp, M_INFO, "Interrupted.");
-			break;
-		}
-
 		if (file_lline(sp, ep, &last2)) {
 err:			rval = 1;
 			break;
 		}
-		if (last2 > last1) {
+		if (last2 > last1) {		/* Created lines. */
 			last2 -= last1;
-			lno += last2;
+			sp->lno = lno += last2;
 			elno += last2;
-		} else if (last1 > last2) {
+		} else if (last1 > last2) {	/* Deleted lines. */
 			last1 -= last2;
-			lno -= last1;
+			sp->lno = lno -= last1;
+			if (sp->lno == 0)
+				sp->lno = 1;
 			elno -= last1;
-		}
+		} else
+			sp->lno = lno;
 
-		/* Cursor moves to last line sent to command. */
-		sp->lno = lno;
+		/* Someone's unhappy, time to stop. */
+		if (F_ISSET(sp, S_INTERRUPTED)) {
+			msgq(sp, M_INFO, "Interrupted.");
+			break;
+		}
 	}
 	F_CLR(sp, S_GLOBAL);
 
-- 
2.11.4.GIT