usr.bin/window/wwclreol.c

   1 /*      $NetBSD: wwclreol.c,v 1.7 2003/08/07 11:17:37 agc 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. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)wwclreol.c  8.1 (Berkeley) 6/6/93";
  39 #else
  40 __RCSID("$NetBSD: wwclreol.c,v 1.7 2003/08/07 11:17:37 agc Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 #include "ww.h"
  45 #include "tt.h"
  46
  47 /*
  48  * Clear w to the end of line.
  49  * If cleared is true, then the screen line has already been cleared.
  50  */
  51 void
  52 wwclreol1(struct ww *w, int row, int col, char cleared)
  53 {
  54         int i;
  55
  56         /*
  57          * Clear the buffer right off
  58          */
  59         {
  60                 union ww_char *buf;
  61
  62                 buf = &w->ww_buf[row][col];
  63                 for (i = w->ww_b.r - col; --i >= 0;)
  64                         buf++->c_w = ' ';
  65         }
  66
  67         /*
  68          * If can't see it, just return.
  69          */
  70         if (row < w->ww_i.t || row >= w->ww_i.b
  71             || w->ww_i.r <= 0 || w->ww_i.r <= col)
  72                 return;
  73
  74         if (col < w->ww_i.l)
  75                 col = w->ww_i.l;
  76
  77         /*
  78          * Now fix wwns.
  79          */
  80         {
  81                 union ww_char *s;
  82                 unsigned char *smap;
  83                 char *win;
  84
  85                 i = col;
  86                 smap = &wwsmap[row][i];
  87                 s = &wwns[row][i];
  88                 win = &w->ww_win[row][i];
  89                 for (i = w->ww_i.r - i; --i >= 0;)
  90                         if (*smap++ == w->ww_index)
  91                                 s++->c_w = ' ' | *win++ << WWC_MSHIFT;
  92                         else
  93                                 s++, win++;
  94         }
  95         if (!cleared)
  96                 wwtouched[row] |= WWU_TOUCHED;
  97 }