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/* $OpenBSD: erase.c,v 1.3 2005/08/14 17:15:19 espie Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "curses.h"
/*
* werase --
* Erases everything on the window.
*/
int
werase(win)
register WINDOW *win;
{
register int minx, y;
register __LDATA *sp, *end, *start, *maxx;
#ifdef DEBUG
__CTRACE("werase: (%0.2o)\n", win);
#endif
for (y = 0; y < win->maxy; y++) {
minx = -1;
start = win->lines[y]->line;
end = &start[win->maxx];
for (sp = start; sp < end; sp++)
if (sp->ch != ' ' || sp->attr != 0) {
maxx = sp;
if (minx == -1)
minx = sp - start;
sp->ch = ' ';
sp->attr = 0;
}
if (minx != -1)
__touchline(win, y, minx, maxx - win->lines[y]->line,
0);
}
return (OK);
}
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