lib/libcurses/clrtoeol.c

   1 /*      $NetBSD: clrtoeol.c,v 1.24 2007/05/29 11:10:56 blymn 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 1.24 2007/05/29 11:10:56 blymn 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 (__using_color && win != curscr)
  86                 attr = win->battr & __COLOR;
  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;
 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 }