NetBSD/lib/libcurses/erase.c

73 lines
2.6 KiB
C

/*
* Copyright (c) 1981 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#ifndef lint
/*static char sccsid[] = "from: @(#)erase.c 5.5 (Berkeley) 8/23/92";*/
static char rcsid[] = "$Id: erase.c,v 1.4 1993/08/07 05:48:50 mycroft Exp $";
#endif /* not lint */
#include <curses.h>
/*
* werase --
* Erases everything on the window.
*/
int
werase(win)
register WINDOW *win;
{
register int minx, y;
register char *sp, *end, *start, *maxx;
#ifdef DEBUG
__TRACE("werase: (%0.2o)\n", win);
#endif
for (y = 0; y < win->_maxy; y++) {
minx = _NOCHANGE;
start = win->_y[y];
end = &start[win->_maxx];
for (sp = start; sp < end; sp++)
if (*sp != ' ') {
maxx = sp;
if (minx == _NOCHANGE)
minx = sp - start;
*sp = ' ';
}
if (minx != _NOCHANGE)
touchline(win, y, minx, maxx - win->_y[y]);
}
win->_curx = win->_cury = 0;
return (OK);
}