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clrtoeol.c revision 1.25.6.1 
      1 /*	$NetBSD: clrtoeol.c,v 1.25.6.1 2012/04/17 00:05:27 yamt 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 1.25.6.1 2012/04/17 00:05:27 yamt Exp $");
     38 #endif
     39 #endif				/* not lint */
     40 
     41 #include <stdlib.h>
     42 #include "curses.h"
     43 #include "curses_private.h"
     44 
     45 #ifndef _CURSES_USE_MACROS
     46 
     47 /*
     48  * clrtoeol --
     49  *	Clear up to the end of line.
     50  */
     51 int
     52 clrtoeol(void)
     53 {
     54 	return wclrtoeol(stdscr);
     55 }
     56 
     57 #endif
     58 
     59 /*
     60  * wclrtoeol --
     61  *	Clear up to the end of line.
     62  */
     63 int
     64 wclrtoeol(WINDOW *win)
     65 {
     66 	int     minx, x, y;
     67 	__LDATA *end, *maxx, *sp;
     68 	attr_t	attr;
     69 
     70 	y = win->cury;
     71 	x = win->curx;
     72 	if (win->alines[y]->flags & __ISPASTEOL) {
     73 		if (y < win->maxy - 1) {
     74 			win->alines[y]->flags &= ~__ISPASTEOL;
     75 			y++;
     76 			x = 0;
     77 			win->cury = y;
     78 			win->curx = x;
     79 		} else
     80 			return (OK);
     81 	}
     82 	end = &win->alines[y]->line[win->maxx];
     83 	minx = -1;
     84 	maxx = &win->alines[y]->line[x];
     85 	if (win != curscr)
     86 		attr = win->battr & __ATTRIBUTES;
     87 	else
     88 		attr = 0;
     89 	for (sp = maxx; sp < end; sp++)
     90 #ifndef HAVE_WCHAR
     91 		if (sp->ch != win->bch || sp->attr != attr) {
     92 #else
     93 		if (sp->ch != ( wchar_t )btowc(( int ) win->bch ) ||
     94 		    (sp->attr & WA_ATTRIBUTES) != attr || sp->nsp
     95 		    || (WCOL(*sp) < 0)) {
     96 #endif /* HAVE_WCHAR */
     97 			maxx = sp;
     98 			if (minx == -1)
     99 				minx = (int) (sp - win->alines[y]->line);
    100 			sp->attr = attr | (sp->attr & __ALTCHARSET);
    101 #ifdef HAVE_WCHAR
    102 			sp->ch = ( wchar_t )btowc(( int ) win->bch);
    103 			if (_cursesi_copy_nsp(win->bnsp, sp) == ERR)
    104 				return ERR;
    105 			SET_WCOL( *sp, 1 );
    106 #else
    107 			sp->ch = win->bch;
    108 #endif /* HAVE_WCHAR */
    109 		}
    110 #ifdef DEBUG
    111 	__CTRACE(__CTRACE_ERASE, "CLRTOEOL: y = %d, minx = %d, maxx = %d, "
    112 	    "firstch = %d, lastch = %d\n",
    113 	    y, minx, (int) (maxx - win->alines[y]->line),
    114 	    *win->alines[y]->firstchp, *win->alines[y]->lastchp);
    115 #endif
    116 	/* Update firstch and lastch for the line. */
    117 	return (__touchline(win, y, x, (int) win->maxx - 1));
    118 }
    119