X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ncurses%2Fbase%2Flib_redrawln.c;h=c99d6992a2a9e8da59e7fd12b62883566f15d3ee;hp=10fda917984e38c520c101a55c82194953a5130b;hb=d6c65d287166c3105ece4a5e3f3ec7af5a5f26a3;hpb=0eb88fc5281804773e2a0c7a488a4452463535ce

diff --git a/ncurses/base/lib_redrawln.c b/ncurses/base/lib_redrawln.c
index 10fda917..c99d6992 100644
--- a/ncurses/base/lib_redrawln.c
+++ b/ncurses/base/lib_redrawln.c
@@ -1,5 +1,6 @@
 /****************************************************************************
- * Copyright (c) 1998 Free Software Foundation, Inc.                        *
+ * Copyright 2020 Thomas E. Dickey                                          *
+ * Copyright 1998-2009,2010 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            *
@@ -39,31 +40,49 @@
 
 #include <curses.priv.h>
 
-MODULE_ID("$Id: lib_redrawln.c,v 1.7 1998/09/19 20:09:50 Alexander.V.Lukyanov Exp $")
+MODULE_ID("$Id: lib_redrawln.c,v 1.18 2020/02/02 23:34:34 tom Exp $")
 
-int wredrawln(WINDOW *win, int beg, int num)
+NCURSES_EXPORT(int)
+wredrawln(WINDOW *win, int beg, int num)
 {
-	int i;
-	int end;
-	size_t len = (win->_maxx + 1) * sizeof(chtype);
+    int i;
+    int end;
+    size_t len;
+    SCREEN *sp;
 
-	T((T_CALLED("wredrawln(%p,%d,%d)"), win, beg, num));
+    T((T_CALLED("wredrawln(%p,%d,%d)"), (void *) win, beg, num));
 
-	if (beg < 0)
-		beg = 0;
+    if (win == 0)
+	returnCode(ERR);
 
-	if (touchline (win, beg, num) == ERR)
-		returnCode(ERR);
+    sp = _nc_screen_of(win);
 
-	end = beg + num;
-	if (end > win->_maxy + 1)
-		end = win->_maxy + 1;
+    if (beg < 0)
+	beg = 0;
 
-	for (i = beg; i < end; i++)
-	{
-		memset (curscr->_line[i+win->_begy].text+win->_begx, 0, len);
-		_nc_make_oldhash(i+win->_begy);
-	}
+    if (touchline(win, beg, num) == ERR)
+	returnCode(ERR);
 
-	returnCode(OK);
+    if (touchline(CurScreen(sp), beg + win->_begy, num) == ERR)
+	returnCode(ERR);
+
+    end = beg + num;
+    if (end > CurScreen(sp)->_maxy + 1 - win->_begy)
+	end = CurScreen(sp)->_maxy + 1 - win->_begy;
+    if (end > win->_maxy + 1)
+	end = win->_maxy + 1;
+
+    len = (size_t) (win->_maxx + 1);
+    if (len > (size_t) (CurScreen(sp)->_maxx + 1 - win->_begx))
+	len = (size_t) (CurScreen(sp)->_maxx + 1 - win->_begx);
+    len *= sizeof(CurScreen(sp)->_line[0].text[0]);
+
+    for (i = beg; i < end; i++) {
+	int crow = i + win->_begy;
+
+	memset(CurScreen(sp)->_line[crow].text + win->_begx, 0, len);
+	NCURSES_SP_NAME(_nc_make_oldhash) (NCURSES_SP_ARGx crow);
+    }
+
+    returnCode(OK);
 }