186d7f5d3SJohn Marino /* @(#)wwdelline.c 8.1 (Berkeley) 6/6/93 */
286d7f5d3SJohn Marino /* $NetBSD: wwdelline.c,v 1.6 2003/08/07 11:17:38 agc Exp $ */
386d7f5d3SJohn Marino
486d7f5d3SJohn Marino /*
586d7f5d3SJohn Marino * Copyright (c) 1983, 1993
686d7f5d3SJohn Marino * The Regents of the University of California. All rights reserved.
786d7f5d3SJohn Marino *
886d7f5d3SJohn Marino * This code is derived from software contributed to Berkeley by
986d7f5d3SJohn Marino * Edward Wang at The University of California, Berkeley.
1086d7f5d3SJohn Marino *
1186d7f5d3SJohn Marino * Redistribution and use in source and binary forms, with or without
1286d7f5d3SJohn Marino * modification, are permitted provided that the following conditions
1386d7f5d3SJohn Marino * are met:
1486d7f5d3SJohn Marino * 1. Redistributions of source code must retain the above copyright
1586d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer.
1686d7f5d3SJohn Marino * 2. Redistributions in binary form must reproduce the above copyright
1786d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer in the
1886d7f5d3SJohn Marino * documentation and/or other materials provided with the distribution.
1986d7f5d3SJohn Marino * 3. Neither the name of the University nor the names of its contributors
2086d7f5d3SJohn Marino * may be used to endorse or promote products derived from this software
2186d7f5d3SJohn Marino * without specific prior written permission.
2286d7f5d3SJohn Marino *
2386d7f5d3SJohn Marino * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2486d7f5d3SJohn Marino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2586d7f5d3SJohn Marino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2686d7f5d3SJohn Marino * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2786d7f5d3SJohn Marino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2886d7f5d3SJohn Marino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2986d7f5d3SJohn Marino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3086d7f5d3SJohn Marino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
3186d7f5d3SJohn Marino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
3286d7f5d3SJohn Marino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3386d7f5d3SJohn Marino * SUCH DAMAGE.
3486d7f5d3SJohn Marino */
3586d7f5d3SJohn Marino
3686d7f5d3SJohn Marino #include "ww.h"
3786d7f5d3SJohn Marino
3886d7f5d3SJohn Marino void
wwdelline(struct ww * w,int row)3986d7f5d3SJohn Marino wwdelline(struct ww *w, int row)
4086d7f5d3SJohn Marino {
4186d7f5d3SJohn Marino int i;
4286d7f5d3SJohn Marino union ww_char **cpp, **cqq;
4386d7f5d3SJohn Marino union ww_char *cp;
4486d7f5d3SJohn Marino int row1, row2;
4586d7f5d3SJohn Marino char deleted;
4686d7f5d3SJohn Marino int visible;
4786d7f5d3SJohn Marino
4886d7f5d3SJohn Marino /*
4986d7f5d3SJohn Marino * Scroll first.
5086d7f5d3SJohn Marino */
5186d7f5d3SJohn Marino if ((row1 = row) < w->ww_i.t) {
5286d7f5d3SJohn Marino row1 = w->ww_i.t;
5386d7f5d3SJohn Marino }
5486d7f5d3SJohn Marino if ((row2 = w->ww_b.b) > w->ww_i.b) {
5586d7f5d3SJohn Marino row2 = w->ww_i.b;
5686d7f5d3SJohn Marino visible = 0;
5786d7f5d3SJohn Marino } else
5886d7f5d3SJohn Marino visible = 1;
5986d7f5d3SJohn Marino deleted = wwscroll1(w, row1, row2, 1, visible);
6086d7f5d3SJohn Marino
6186d7f5d3SJohn Marino /*
6286d7f5d3SJohn Marino * Fix the buffer.
6386d7f5d3SJohn Marino * But leave clearing the last line for wwclreol().
6486d7f5d3SJohn Marino */
6586d7f5d3SJohn Marino cpp = &w->ww_buf[row];
6686d7f5d3SJohn Marino cqq = cpp + 1;
6786d7f5d3SJohn Marino cp = *cpp;
6886d7f5d3SJohn Marino for (i = w->ww_b.b - row; --i > 0;)
6986d7f5d3SJohn Marino *cpp++ = *cqq++;
7086d7f5d3SJohn Marino *cpp = cp;
7186d7f5d3SJohn Marino
7286d7f5d3SJohn Marino /*
7386d7f5d3SJohn Marino * Now clear the last line.
7486d7f5d3SJohn Marino */
7586d7f5d3SJohn Marino if (visible)
7686d7f5d3SJohn Marino wwclreol1(w, w->ww_b.b - 1, w->ww_b.l, deleted);
7786d7f5d3SJohn Marino else {
7886d7f5d3SJohn Marino cp += w->ww_b.l;
7986d7f5d3SJohn Marino for (i = w->ww_b.nc; --i >= 0;)
8086d7f5d3SJohn Marino cp++->c_w = ' ';
8186d7f5d3SJohn Marino }
8286d7f5d3SJohn Marino }
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