1/****************************************************************************
2 * Copyright 2020 Thomas E. Dickey                                          *
3 * Copyright 1998-2008,2009 Free Software Foundation, Inc.                  *
4 *                                                                          *
5 * Permission is hereby granted, free of charge, to any person obtaining a  *
6 * copy of this software and associated documentation files (the            *
7 * "Software"), to deal in the Software without restriction, including      *
8 * without limitation the rights to use, copy, modify, merge, publish,      *
9 * distribute, distribute with modifications, sublicense, and/or sell       *
10 * copies of the Software, and to permit persons to whom the Software is    *
11 * furnished to do so, subject to the following conditions:                 *
12 *                                                                          *
13 * The above copyright notice and this permission notice shall be included  *
14 * in all copies or substantial portions of the Software.                   *
15 *                                                                          *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
23 *                                                                          *
24 * Except as contained in this notice, the name(s) of the above copyright   *
25 * holders shall not be used in advertising or otherwise to promote the     *
26 * sale, use or other dealings in this Software without prior written       *
27 * authorization.                                                           *
28 ****************************************************************************/
29
30/****************************************************************************
31 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
32 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
33 *     and: Thomas E. Dickey                        1996-on                 *
34 *     and: Juergen Pfeifer                         2008                    *
35 ****************************************************************************/
36
37/*
38**	lib_delwin.c
39**
40**	The routine delwin().
41**
42*/
43
44#include <curses.priv.h>
45
46MODULE_ID("$Id: lib_delwin.c,v 1.21 2020/02/02 23:34:34 tom Exp $")
47
48static bool
49cannot_delete(WINDOW *win)
50{
51    WINDOWLIST *p;
52    bool result = TRUE;
53#ifdef USE_SP_WINDOWLIST
54    SCREEN *sp = _nc_screen_of(win);
55#endif
56
57    for (each_window(SP_PARM, p)) {
58	if (&(p->win) == win) {
59	    result = FALSE;
60	} else if ((p->win._flags & _SUBWIN) != 0
61		   && p->win._parent == win) {
62	    result = TRUE;
63	    break;
64	}
65    }
66    return result;
67}
68
69NCURSES_EXPORT(int)
70delwin(WINDOW *win)
71{
72    int result = ERR;
73
74    T((T_CALLED("delwin(%p)"), (void *) win));
75
76    if (_nc_try_global(curses) == 0) {
77	if (win == 0
78	    || cannot_delete(win)) {
79	    result = ERR;
80	} else {
81#if NCURSES_SP_FUNCS
82	    SCREEN *sp = _nc_screen_of(win);
83#endif
84	    if (win->_flags & _SUBWIN)
85		touchwin(win->_parent);
86	    else if (CurScreen(SP_PARM) != 0)
87		touchwin(CurScreen(SP_PARM));
88
89	    result = _nc_freewin(win);
90	}
91	_nc_unlock_global(curses);
92    }
93    returnCode(result);
94}
95