Annotation of src/usr.bin/window/wwinsline.c, Revision 1.1.1.1
1.1 deraadt 1: /* $NetBSD: wwinsline.c,v 1.3 1995/09/28 10:35:36 tls 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. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the University of
21: * California, Berkeley and its contributors.
22: * 4. Neither the name of the University nor the names of its contributors
23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: */
38:
39: #ifndef lint
40: #if 0
41: static char sccsid[] = "@(#)wwinsline.c 8.1 (Berkeley) 6/6/93";
42: #else
43: static char rcsid[] = "$NetBSD: wwinsline.c,v 1.3 1995/09/28 10:35:36 tls Exp $";
44: #endif
45: #endif /* not lint */
46:
47: #include "ww.h"
48:
49: wwinsline(w, row)
50: register struct ww *w;
51: int row;
52: {
53: register i;
54: register union ww_char **cpp, **cqq;
55: register union ww_char *cp;
56: int row1, row2;
57: char deleted;
58: int visible;
59:
60: /*
61: * Scroll first.
62: */
63: if ((row1 = row) < w->ww_i.t) {
64: row1 = w->ww_i.t;
65: visible = 0;
66: } else
67: visible = 1;
68: if ((row2 = w->ww_b.b) > w->ww_i.b) {
69: row2 = w->ww_i.b;
70: }
71: deleted = wwscroll1(w, row1, row2, -1, visible);
72:
73: /*
74: * Fix the buffer.
75: * But leave clearing the last line for wwclreol().
76: */
77: cpp = &w->ww_buf[w->ww_b.b];
78: cqq = cpp - 1;
79: cp = *cqq;
80: for (i = w->ww_b.b - row; --i > 0;)
81: *--cpp = *--cqq;
82: *cqq = cp;
83:
84: /*
85: * Now clear the last line.
86: */
87: if (visible)
88: wwclreol1(w, row, w->ww_b.l, deleted);
89: else {
90: cp += w->ww_b.l;
91: for (i = w->ww_b.nc; --i >= 0;)
92: cp++->c_w = ' ';
93: }
94: }