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clrtoeol.c revision 1.7 
      1 /*
      2  * Copyright (c) 1981, 1993, 1994
      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 static char sccsid[] = "@(#)clrtoeol.c	8.2 (Berkeley) 5/4/94";
     36 #endif	/* not lint */
     37 
     38 #include "curses.h"
     39 
     40 /*
     41  * wclrtoeol --
     42  *	Clear up to the end of line.
     43  */
     44 int
     45 wclrtoeol(win)
     46 	register WINDOW *win;
     47 {
     48 	register int minx, x, y;
     49 	register __LDATA *end, *maxx, *sp;
     50 
     51 	y = win->cury;
     52 	x = win->curx;
     53 	if (win->lines[y]->flags & __ISPASTEOL) {
     54 		if (y < win->maxy - 1) {
     55 			y++;
     56 			x = 0;
     57 		} else
     58 			return (OK);
     59 	}
     60 	end = &win->lines[y]->line[win->maxx];
     61 	minx = -1;
     62 	maxx = &win->lines[y]->line[x];
     63 	for (sp = maxx; sp < end; sp++)
     64 		if (sp->ch != ' ' || sp->attr != 0) {
     65 			maxx = sp;
     66 			if (minx == -1)
     67 				minx = sp - win->lines[y]->line;
     68 			sp->ch = ' ';
     69 			sp->attr = 0;
     70 		}
     71 #ifdef DEBUG
     72 	__CTRACE("CLRTOEOL: minx = %d, maxx = %d, firstch = %d, lastch = %d\n",
     73 	    minx, maxx - win->lines[y]->line, *win->lines[y]->firstchp,
     74 	    *win->lines[y]->lastchp);
     75 #endif
     76 	/* Update firstch and lastch for the line. */
     77 	return (__touchline(win, y, x, win->maxx - 1, 0));
     78 }
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