window/wwclreol.c

   1 /*      $NetBSD: wwclreol.c,v 1.5 1997/11/21 08:37:03 lukem Exp $       */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Edward Wang at The University of California, Berkeley.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the University of
  21  *      California, Berkeley and its contributors.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include <sys/cdefs.h>
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)wwclreol.c  8.1 (Berkeley) 6/6/93";
  43 #else
  44 __RCSID("$NetBSD: wwclreol.c,v 1.5 1997/11/21 08:37:03 lukem Exp $");
  45 #endif
  46 #endif /* not lint */
  47
  48 #include "ww.h"
  49 #include "tt.h"
  50
  51 /*
  52  * Clear w to the end of line.
  53  * If cleared is true, then the screen line has already been cleared.
  54  */
  55 void
  56 wwclreol1(w, row, col, cleared)
  57         struct ww *w;
  58         int row, col;
  59         char cleared;
  60 {
  61         int i;
  62
  63         /*
  64          * Clear the buffer right off
  65          */
  66         {
  67                 union ww_char *buf;
  68
  69                 buf = &w->ww_buf[row][col];
  70                 for (i = w->ww_b.r - col; --i >= 0;)
  71                         buf++->c_w = ' ';
  72         }
  73
  74         /*
  75          * If can't see it, just return.
  76          */
  77         if (row < w->ww_i.t || row >= w->ww_i.b
  78             || w->ww_i.r <= 0 || w->ww_i.r <= col)
  79                 return;
  80
  81         if (col < w->ww_i.l)
  82                 col = w->ww_i.l;
  83
  84         /*
  85          * Now fix wwns.
  86          */
  87         {
  88                 union ww_char *s;
  89                 unsigned char *smap;
  90                 char *win;
  91
  92                 i = col;
  93                 smap = &wwsmap[row][i];
  94                 s = &wwns[row][i];
  95                 win = &w->ww_win[row][i];
  96                 for (i = w->ww_i.r - i; --i >= 0;)
  97                         if (*smap++ == w->ww_index)
  98                                 s++->c_w = ' ' | *win++ << WWC_MSHIFT;
  99                         else
 100                                 s++, win++;
 101         }
 102         if (!cleared)
 103                 wwtouched[row] |= WWU_TOUCHED;
 104 }