scroll

commit f9a8555e8d14d53c18d558a777794d2182718f42
parent 7e05ee78525d93fb4b3aed2dd5f7ec53f19b8a57
Author: Jochen Sprickerhof <git@jochen.sprickerhof.de>
Date:   Tue, 11 Feb 2020 21:32:54 +0100

Simplify logic

Diffstat:
M
scroll.c
 | 
10
++++------

1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/scroll.c b/scroll.c
@@ -188,10 +188,9 @@ scrollup(void)
 
 	/* print one page */
 	for (; rows > ws.ws_row - first;) {
-		if (TAILQ_PREV(bottom, tailhead, entries) != NULL)
-			bottom = TAILQ_PREV(bottom, tailhead, entries);
-		else
+		if (TAILQ_PREV(bottom, tailhead, entries) == NULL)
 			break;
+		bottom = TAILQ_PREV(bottom, tailhead, entries);
 
 		if (--rows > ws.ws_row - first)
 			write(STDOUT_FILENO, bottom->buf, bottom->size);
@@ -208,10 +207,9 @@ scrolldown(void)
 	write(STDOUT_FILENO, "\r\n", 2);
 	/* print one page */
 	for (; rows >= 0;) {
-		if (TAILQ_PREV(bottom, tailhead, entries) != NULL)
-			bottom = TAILQ_PREV(bottom, tailhead, entries);
-		else
+		if (TAILQ_PREV(bottom, tailhead, entries) == NULL)
 			break;
+		bottom = TAILQ_PREV(bottom, tailhead, entries);
 
 		if (--rows > 0)
 			write(STDOUT_FILENO, bottom->buf, bottom->size);