text: /*
   * Copyright (c) 1983, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * This code is derived from software contributed to Berkeley by
   * Edward Wang at The University of California, Berkeley.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by the University of
   *	California, Berkeley and its contributors.
   * 4. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #ifndef lint
  static char sccsid[] = "@(#)wwinsline.c	8.1 (Berkeley) 6/6/93";
  static char rcsid[] =
    "$FreeBSD: src/usr.bin/window/wwinsline.c,v 1.3 2001/05/17 09:38:49 obrien Exp $";
  #endif /* not lint */
  
  #include "ww.h"
  
  wwinsline(w, row)
  register struct ww *w;
  int row;
  {
  	register i;
  	register union ww_char **cpp, **cqq;
  	register union ww_char *cp;
  	int row1, row2;
  	char deleted;
  	int visible;
  
  	/*
  	 * Scroll first.
  	 */
  	if ((row1 = row) < w->ww_i.t) {
  		row1 = w->ww_i.t;
  		visible = 0;
  	} else
  		visible = 1;
  	if ((row2 = w->ww_b.b) > w->ww_i.b) {
  		row2 = w->ww_i.b;
  	}
  	deleted = wwscroll1(w, row1, row2, -1, visible);
  
  	/*
  	 * Fix the buffer.
  	 * But leave clearing the last line for wwclreol().
  	 */
  	cpp = &w->ww_buf[w->ww_b.b];
  	cqq = cpp - 1;
  	cp = *cqq;
  	for (i = w->ww_b.b - row; --i > 0;)
  		*--cpp = *--cqq;
  	*cqq = cp;
  
  	/*
  	 * Now clear the last line.
  	 */
  	if (visible)
  		wwclreol1(w, row, w->ww_b.l, deleted);
  	else {
  		cp += w->ww_b.l;
  		for (i = w->ww_b.nc; --i >= 0;)
  			cp++->c_w = ' ';
  	}
  }
  