1 /****************************************************************************
2 * Copyright 2020,2022 Thomas E. Dickey *
3 * Copyright 1998-2009,2016 Free Software Foundation, Inc. *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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28 ****************************************************************************/
30 /****************************************************************************
31 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
32 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
33 * and: Thomas E. Dickey 1996-on *
34 ****************************************************************************/
39 ** The routine werase().
43 #include <curses.priv.h>
45 MODULE_ID("$Id: lib_erase.c,v 1.20 2022/09/03 21:40:27 tom Exp $")
53 T((T_CALLED("werase(%p)"), (void *) win));
60 blank = win->_nc_bkgd;
61 for (y = 0; y <= win->_maxy; y++) {
64 start = win->_line[y].text;
65 end = &start[win->_maxx];
68 * If this is a derived window, we have to handle the case where
69 * a multicolumn character extends into the window that we are
73 if (isWidecExt(start[0])) {
74 int x = (win->_parent != 0) ? (win->_begx) : 0;
76 if (isWidecBase(start[-1])) {
85 for (sp = start; sp <= end; sp++)
88 win->_line[y].firstchar = 0;
89 win->_line[y].lastchar = win->_maxx;
91 win->_curx = win->_cury = 0;
92 win->_flags &= ~_WRAPPED;