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clrtoeol.c revision 1.18 
      1 /*	$NetBSD: clrtoeol.c,v 1.18 2003/10/05 08:26:02 jdc Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1981, 1993, 1994
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)clrtoeol.c	8.2 (Berkeley) 5/4/94";
     36 #else
     37 __RCSID("$NetBSD: clrtoeol.c,v 1.18 2003/10/05 08:26:02 jdc Exp $");
     38 #endif
     39 #endif				/* not lint */
     40 
     41 #include "curses.h"
     42 #include "curses_private.h"
     43 
     44 #ifndef _CURSES_USE_MACROS
     45 
     46 /*
     47  * clrtoeol --
     48  *	Clear up to the end of line.
     49  */
     50 int
     51 clrtoeol(void)
     52 {
     53 	return wclrtoeol(stdscr);
     54 }
     55 
     56 #endif
     57 
     58 /*
     59  * wclrtoeol --
     60  *	Clear up to the end of line.
     61  */
     62 int
     63 wclrtoeol(WINDOW *win)
     64 {
     65 	int     minx, x, y;
     66 	__LDATA *end, *maxx, *sp;
     67 
     68 	y = win->cury;
     69 	x = win->curx;
     70 	if (win->lines[y]->flags & __ISPASTEOL) {
     71 		if (y < win->maxy - 1) {
     72 			win->lines[y]->flags &= ~__ISPASTEOL;
     73 			y++;
     74 			x = 0;
     75 			win->cury = y;
     76 			win->curx = x;
     77 		} else
     78 			return (OK);
     79 	}
     80 	end = &win->lines[y]->line[win->maxx];
     81 	minx = -1;
     82 	maxx = &win->lines[y]->line[x];
     83 	for (sp = maxx; sp < end; sp++)
     84 		if (sp->ch != ' ' || sp->attr != 0 ||
     85 		    sp->bch != win->bch || sp->battr != win->battr) {
     86 			maxx = sp;
     87 			if (minx == -1)
     88 				minx = sp - win->lines[y]->line;
     89 			sp->ch = ' ';
     90 			sp->bch = win->bch;
     91 			sp->attr = 0;
     92 			sp->battr = win->battr;
     93 		}
     94 #ifdef DEBUG
     95 	__CTRACE("CLRTOEOL: minx = %d, maxx = %d, firstch = %d, lastch = %d\n",
     96 	    minx, (int) (maxx - win->lines[y]->line),
     97 	     *win->lines[y]->firstchp, *win->lines[y]->lastchp);
     98 #endif
     99 	/* Update firstch and lastch for the line. */
    100 	return (__touchline(win, y, x, (int) win->maxx - 1));
    101 }
    102