1/****************************************************************************
2 * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc.              *
3 *                                                                          *
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5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
7 * without limitation the rights to use, copy, modify, merge, publish,      *
8 * distribute, distribute with modifications, sublicense, and/or sell       *
9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
23 * Except as contained in this notice, the name(s) of the above copyright   *
24 * holders shall not be used in advertising or otherwise to promote the     *
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26 * authorization.                                                           *
27 ****************************************************************************/
28
29/****************************************************************************
30 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32 ****************************************************************************/
33
34/*
35**	lib_delwin.c
36**
37**	The routine delwin().
38**
39*/
40
41#include <curses.priv.h>
42
43MODULE_ID("$Id: lib_delwin.c,v 1.17 2008/06/07 14:10:56 tom Exp $")
44
45static bool
46cannot_delete(WINDOW *win)
47{
48    WINDOWLIST *p;
49    bool result = TRUE;
50
51    for (each_window(p)) {
52	if (&(p->win) == win) {
53	    result = FALSE;
54	} else if ((p->win._flags & _SUBWIN) != 0
55		   && p->win._parent == win) {
56	    result = TRUE;
57	    break;
58	}
59    }
60    return result;
61}
62
63NCURSES_EXPORT(int)
64delwin(WINDOW *win)
65{
66    int result = ERR;
67
68    T((T_CALLED("delwin(%p)"), win));
69
70    if (_nc_try_global(curses) == 0) {
71	if (win == 0
72	    || cannot_delete(win)) {
73	    result = ERR;
74	} else {
75
76	    if (win->_flags & _SUBWIN)
77		touchwin(win->_parent);
78	    else if (curscr != 0)
79		touchwin(curscr);
80
81	    result = _nc_freewin(win);
82	}
83	_nc_unlock_global(curses);
84    }
85    returnCode(result);
86}
87