usr.bin/window/wwclreol.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Edward Wang at The University of California, Berkeley.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#)wwclreol.c       8.1 (Berkeley) 6/6/93
  37  * $FreeBSD: src/usr.bin/window/wwclreol.c,v 1.2.12.1 2001/05/17 09:45:01 obrien Exp $
  38  * $DragonFly: src/usr.bin/window/wwclreol.c,v 1.2 2003/06/17 04:29:34 dillon Exp $
  39  */
  40
  41 #include "ww.h"
  42 #include "tt.h"
  43
  44 /*
  45  * Clear w to the end of line.
  46  * If cleared is true, then the screen line has already been cleared.
  47  */
  48 wwclreol1(w, row, col, cleared)
  49 register struct ww *w;
  50 int row, col;
  51 char cleared;
  52 {
  53         register i;
  54
  55         /*
  56          * Clear the buffer right off
  57          */
  58         {
  59                 register union ww_char *buf;
  60
  61                 buf = &w->ww_buf[row][col];
  62                 for (i = w->ww_b.r - col; --i >= 0;)
  63                         buf++->c_w = ' ';
  64         }
  65
  66         /*
  67          * If can't see it, just return.
  68          */
  69         if (row < w->ww_i.t || row >= w->ww_i.b
  70             || w->ww_i.r <= 0 || w->ww_i.r <= col)
  71                 return;
  72
  73         if (col < w->ww_i.l)
  74                 col = w->ww_i.l;
  75
  76         /*
  77          * Now fix wwns.
  78          */
  79         {
  80                 register union ww_char *s;
  81                 register char *smap, *win;
  82
  83                 i = col;
  84                 smap = &wwsmap[row][i];
  85                 s = &wwns[row][i];
  86                 win = &w->ww_win[row][i];
  87                 for (i = w->ww_i.r - i; --i >= 0;)
  88                         if (*smap++ == w->ww_index)
  89                                 s++->c_w = ' ' | *win++ << WWC_MSHIFT;
  90                         else
  91                                 s++, win++;
  92         }
  93         if (!cleared)
  94                 wwtouched[row] |= WWU_TOUCHED;
  95 }