1 /* $OpenBSD: lib_delwin.c,v 1.4 2023/10/17 09:52:08 nicm Exp $ */
2
3 /****************************************************************************
4 * Copyright 2020,2021 Thomas E. Dickey *
5 * Copyright 1998-2008,2009 Free Software Foundation, Inc. *
6 * *
7 * Permission is hereby granted, free of charge, to any person obtaining a *
8 * copy of this software and associated documentation files (the *
9 * "Software"), to deal in the Software without restriction, including *
10 * without limitation the rights to use, copy, modify, merge, publish, *
11 * distribute, distribute with modifications, sublicense, and/or sell *
12 * copies of the Software, and to permit persons to whom the Software is *
13 * furnished to do so, subject to the following conditions: *
14 * *
15 * The above copyright notice and this permission notice shall be included *
16 * in all copies or substantial portions of the Software. *
17 * *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
25 * *
26 * Except as contained in this notice, the name(s) of the above copyright *
27 * holders shall not be used in advertising or otherwise to promote the *
28 * sale, use or other dealings in this Software without prior written *
29 * authorization. *
30 ****************************************************************************/
31
32 /****************************************************************************
33 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
34 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
35 * and: Thomas E. Dickey 1996-on *
36 * and: Juergen Pfeifer 2008 *
37 ****************************************************************************/
38
39 /*
40 ** lib_delwin.c
41 **
42 ** The routine delwin().
43 **
44 */
45
46 #include <curses.priv.h>
47
48 MODULE_ID("$Id: lib_delwin.c,v 1.4 2023/10/17 09:52:08 nicm Exp $")
49
50 static bool
cannot_delete(WINDOW * win)51 cannot_delete(WINDOW *win)
52 {
53 bool result = TRUE;
54
55 if (IS_PAD(win)) {
56 result = FALSE;
57 } else {
58 WINDOWLIST *p;
59 #ifdef USE_SP_WINDOWLIST
60 SCREEN *sp = _nc_screen_of(win);
61 #endif
62
63 for (each_window(SP_PARM, p)) {
64 if (&(p->win) == win) {
65 result = FALSE;
66 } else if (IS_SUBWIN(&(p->win))
67 && p->win._parent == win) {
68 result = TRUE;
69 break;
70 }
71 }
72 }
73 return result;
74 }
75
76 NCURSES_EXPORT(int)
delwin(WINDOW * win)77 delwin(WINDOW *win)
78 {
79 int result = ERR;
80
81 T((T_CALLED("delwin(%p)"), (void *) win));
82
83 if (_nc_try_global(curses) == 0) {
84 if (win == 0
85 || cannot_delete(win)) {
86 result = ERR;
87 } else if (IS_PAD(win)) {
88 win->_parent = NULL;
89 result = _nc_freewin(win);
90 } else {
91 #if NCURSES_SP_FUNCS
92 SCREEN *sp = _nc_screen_of(win);
93 #endif
94 if (IS_SUBWIN(win)) {
95 touchwin(win->_parent);
96 } else if (CurScreen(SP_PARM) != 0) {
97 touchwin(CurScreen(SP_PARM));
98 }
99 result = _nc_freewin(win);
100 }
101 _nc_unlock_global(curses);
102 }
103 returnCode(result);
104 }
105