sbase

commit ae50e31d532df74e97d2e0525d0f282cf3377142
parent 0190f5e7bf8985af3ed768f7d17d192c23beb5d1
Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date:   Mon,  8 Dec 2025 17:01:30 +0100

ed: Allow z commands with no address

When a single z commit is executed then nlines == 0, and
we don't have a value for the line where scroll and this
is why we have to call deflines() to setup the default
value.

Diffstat:
M
ed.c
 | 
3
++-
A
tests/0006-ed.sh
 | 
14
++++++++++++++

2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/ed.c b/ed.c
@@ -1385,13 +1385,14 @@ repeat:
 	      		join();
 		break;
 	case 'z':
-		if (nlines != 1)
+		if (nlines > 1)
 			goto bad_address;
 		if (isdigit(back(input())))
 			num = getnum();
 		else
 			num = 24;
 		chkprint(1);
+		deflines(curln, curln);
 		scroll(num);
 		break;
 	case 'k':
diff --git a/tests/0006-ed.sh b/tests/0006-ed.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+../ed <<EOF | (read a && read b && test $a-$b == 1-2)
+0a
+1
+2
+3
+4
+5
+6
+.
+1z1
+z1
+EOF