usr.bin/window/wwclreol.c

   1 /*      @(#)wwclreol.c  8.1 (Berkeley) 6/6/93   */
   2 /*      $NetBSD: wwclreol.c,v 1.7 2003/08/07 11:17:37 agc Exp $ */
   3
   4 /*
   5  * Copyright (c) 1983, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Edward Wang at The University of California, Berkeley.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "ww.h"
  37 #include "tt.h"
  38
  39 /*
  40  * Clear w to the end of line.
  41  * If cleared is true, then the screen line has already been cleared.
  42  */
  43 void
  44 wwclreol1(struct ww *w, int row, int col, char cleared)
  45 {
  46         int i;
  47
  48         /*
  49          * Clear the buffer right off
  50          */
  51         {
  52                 union ww_char *buf;
  53
  54                 buf = &w->ww_buf[row][col];
  55                 for (i = w->ww_b.r - col; --i >= 0;)
  56                         buf++->c_w = ' ';
  57         }
  58
  59         /*
  60          * If can't see it, just return.
  61          */
  62         if (row < w->ww_i.t || row >= w->ww_i.b
  63             || w->ww_i.r <= 0 || w->ww_i.r <= col)
  64                 return;
  65
  66         if (col < w->ww_i.l)
  67                 col = w->ww_i.l;
  68
  69         /*
  70          * Now fix wwns.
  71          */
  72         {
  73                 union ww_char *s;
  74                 unsigned char *smap;
  75                 char *win;
  76
  77                 i = col;
  78                 smap = &wwsmap[row][i];
  79                 s = &wwns[row][i];
  80                 win = &w->ww_win[row][i];
  81                 for (i = w->ww_i.r - i; --i >= 0;)
  82                         if (*smap++ == w->ww_index)
  83                                 s++->c_w = ' ' | *win++ << WWC_MSHIFT;
  84                         else
  85                                 s++, win++;
  86         }
  87         if (!cleared)
  88                 wwtouched[row] |= WWU_TOUCHED;
  89 }