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clrtobot.c revision 1.4 
      1 /*
      2  * Copyright (c) 1981 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 /*static char sccsid[] = "from: @(#)clrtobot.c	5.6 (Berkeley) 8/23/92";*/
     36 static char rcsid[] = "$Id: clrtobot.c,v 1.4 1993/08/07 05:48:42 mycroft Exp $";
     37 #endif	/* not lint */
     38 
     39 #include <curses.h>
     40 
     41 /*
     42  * wclrtobot --
     43  *	Erase everything on the window.
     44  */
     45 int
     46 wclrtobot(win)
     47 	register WINDOW *win;
     48 {
     49 	register int minx, startx, y;
     50 	register char *sp, *end, *maxx;
     51 
     52 	startx = win->_curx;
     53 	for (y = win->_cury; y < win->_maxy; y++) {
     54 		minx = _NOCHANGE;
     55 		end = &win->_y[y][win->_maxx];
     56 		for (sp = &win->_y[y][startx]; sp < end; sp++)
     57 			if (*sp != ' ') {
     58 				maxx = sp;
     59 				if (minx == _NOCHANGE)
     60 					minx = sp - win->_y[y];
     61 				*sp = ' ';
     62 			}
     63 		if (minx != _NOCHANGE)
     64 			touchline(win, y, minx, maxx - &win->_y[y][0]);
     65 		startx = 0;
     66 	}
     67 	return (OK);
     68 }
     69