libncurses: Import https://ftp.gnu.org/pub/gnu/ncurses/ncurses-6.5.tar.gz changes
Change-Id: I3433d30ca01359fd2e3623ede96b531f0b39cbfa
Signed-off-by: micky387 <mickaelsaibi@free.fr>
diff --git a/ncurses/base/lib_scroll.c b/ncurses/base/lib_scroll.c
index 8684e25..ecc0ba5 100644
--- a/ncurses/base/lib_scroll.c
+++ b/ncurses/base/lib_scroll.c
@@ -1,5 +1,6 @@
/****************************************************************************
- * Copyright (c) 1998-2010,2011 Free Software Foundation, Inc. *
+ * Copyright 2019,2020 Thomas E. Dickey *
+ * Copyright 1998-2010,2011 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
@@ -43,7 +44,7 @@
#include <curses.priv.h>
-MODULE_ID("$Id: lib_scroll.c,v 1.29 2011/10/22 16:34:50 tom Exp $")
+MODULE_ID("$Id: lib_scroll.c,v 1.32 2020/02/02 23:34:34 tom Exp $")
NCURSES_EXPORT(void)
_nc_scroll_window(WINDOW *win,
@@ -77,11 +78,13 @@
* setup cost. So there is no point in trying to be excessively
* clever -- esr.
*/
+#define BottomLimit(n) ((n) >= 0 && (n) >= top)
+#define TopLimit(n) ((n) <= win->_maxy && (n) <= bottom)
/* shift n lines downwards */
if (n < 0) {
limit = top - n;
- for (line = bottom; line >= limit && line >= 0; line--) {
+ for (line = bottom; line >= limit && BottomLimit(line); line--) {
TR(TRACE_MOVE, ("...copying %d to %d", line + n, line));
memcpy(win->_line[line].text,
win->_line[line + n].text,
@@ -89,7 +92,7 @@
if_USE_SCROLL_HINTS(win->_line[line].oldindex =
win->_line[line + n].oldindex);
}
- for (line = top; line < limit && line <= win->_maxy; line++) {
+ for (line = top; line < limit && TopLimit(line); line++) {
TR(TRACE_MOVE, ("...filling %d", line));
for (j = 0; j <= win->_maxx; j++)
win->_line[line].text[j] = blank;
@@ -100,14 +103,14 @@
/* shift n lines upwards */
if (n > 0) {
limit = bottom - n;
- for (line = top; line <= limit && line <= win->_maxy; line++) {
+ for (line = top; line <= limit && TopLimit(line); line++) {
memcpy(win->_line[line].text,
win->_line[line + n].text,
to_copy);
if_USE_SCROLL_HINTS(win->_line[line].oldindex =
win->_line[line + n].oldindex);
}
- for (line = bottom; line > limit && line >= 0; line--) {
+ for (line = bottom; line > limit && BottomLimit(line); line--) {
for (j = 0; j <= win->_maxx; j++)
win->_line[line].text[j] = blank;
if_USE_SCROLL_HINTS(win->_line[line].oldindex = _NEWINDEX);