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clrtoeol.c revision 1.6 
      1 /*
      2  * Copyright (c) 1981, 1993
      3  *	The Regents of the University of California.  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 /* from: static char sccsid[] = "@(#)clrtoeol.c	8.1 (Berkeley) 6/4/93"; */
     36 static char *rcsid = "$Id: clrtoeol.c,v 1.6 1993/11/09 04:07:02 cgd Exp $";
     37 #endif	/* not lint */
     38 
     39 #include <curses.h>
     40 
     41 /*
     42  * wclrtoeol --
     43  *	Clear up to the end of line.
     44  */
     45 int
     46 wclrtoeol(win)
     47 	register WINDOW *win;
     48 {
     49 	register int minx, x, y;
     50 	register __LDATA *end, *maxx, *sp;
     51 
     52 	y = win->cury;
     53 	x = win->curx;
     54 	if (win->lines[y]->flags & __ISPASTEOL) {
     55 		if (y < win->maxy - 1) {
     56 			y++;
     57 			x = 0;
     58 		} else
     59 			return (OK);
     60 	}
     61 	end = &win->lines[y]->line[win->maxx];
     62 	minx = -1;
     63 	maxx = &win->lines[y]->line[x];
     64 	for (sp = maxx; sp < end; sp++)
     65 		if (sp->ch != ' ' || sp->attr != 0) {
     66 			maxx = sp;
     67 			if (minx == -1)
     68 				minx = sp - win->lines[y]->line;
     69 			sp->ch = ' ';
     70 			sp->attr = 0;
     71 		}
     72 #ifdef DEBUG
     73 	__CTRACE("CLRTOEOL: minx = %d, maxx = %d, firstch = %d, lastch = %d\n",
     74 	    minx, maxx - win->lines[y]->line, *win->lines[y]->firstchp,
     75 	    *win->lines[y]->lastchp);
     76 #endif
     77 	/* Update firstch and lastch for the line. */
     78 	return (__touchline(win, y, x, win->maxx - 1, 0));
     79 }
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