1 /* $NetBSD: delwin.c,v 1.18 2013/10/15 22:15:17 roy Exp $ */
2
3 /*
4 * Copyright (c) 1981, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)delwin.c 8.2 (Berkeley) 5/4/94";
36 #else
37 __RCSID("$NetBSD: delwin.c,v 1.18 2013/10/15 22:15:17 roy Exp $");
38 #endif
39 #endif /* not lint */
40
41 #include <stdlib.h>
42
43 #include "curses.h"
44 #include "curses_private.h"
45
46 /*
47 * delwin --
48 * Delete a window and release it back to the system.
49 */
50 int
delwin(WINDOW * win)51 delwin(WINDOW *win)
52 {
53 WINDOW *wp, *np;
54 struct __winlist *wl, *pwl;
55 SCREEN *screen;
56
57 #ifdef DEBUG
58 __CTRACE(__CTRACE_WINDOW, "delwin(%p)\n", win);
59 #endif
60
61 if (win == NULL)
62 return (OK);
63
64 /*
65 * Free any storage used by non-spacing characters in the window.
66 */
67 #ifdef HAVE_WCHAR
68 __cursesi_win_free_nsp(win);
69 #endif
70
71 if (win->orig == NULL) {
72 /*
73 * If we are the original window, delete the space for all
74 * the subwindows and the window space.
75 */
76 free(win->wspace);
77 wp = win->nextp;
78 while (wp != win) {
79 np = wp->nextp;
80 delwin(wp);
81 wp = np;
82 }
83 /* Remove ourselves from the list of windows on the screen. */
84 pwl = NULL;
85 screen = win->screen;
86 for (wl = screen->winlistp; wl; pwl = wl, wl = wl->nextp) {
87 if (wl->winp != win)
88 continue;
89 if (pwl != NULL)
90 pwl->nextp = wl->nextp;
91 else
92 screen->winlistp = wl->nextp;
93 free(wl);
94 break;
95 }
96 } else {
97 /*
98 * If we are a subwindow, take ourselves out of the list.
99 * NOTE: if we are a subwindow, the minimum list is orig
100 * followed by this subwindow, so there are always at least
101 * two windows in the list.
102 */
103 for (wp = win->nextp; wp->nextp != win; wp = wp->nextp)
104 continue;
105 wp->nextp = win->nextp;
106 }
107 free(win->lspace);
108 free(win->alines);
109 if (win == _cursesi_screen->curscr)
110 _cursesi_screen->curscr = NULL;
111 if (win == _cursesi_screen->stdscr)
112 _cursesi_screen->stdscr = NULL;
113 if (win == _cursesi_screen->__virtscr)
114 _cursesi_screen->__virtscr = NULL;
115 free(win);
116 return (OK);
117 }
118