1/****************************************************************************
2 * Copyright (c) 1998,2000,2001 Free Software Foundation, Inc.              *
3 *                                                                          *
4 * Permission is hereby granted, free of charge, to any person obtaining a  *
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     *
25 * sale, use or other dealings in this Software without prior written       *
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 1.13 2001/08/26 00:40:20 tom Exp $")
44
45static bool
46cannot_delete(WINDOW *win)
47{
48    WINDOWLIST *p;
49    bool result = TRUE;
50
51    for (p = _nc_windows; p != 0; p = p->next) {
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    T((T_CALLED("delwin(%p)"), win));
67
68    if (win == 0
69	|| cannot_delete(win))
70	returnCode(ERR);
71
72    if (win->_flags & _SUBWIN)
73	touchwin(win->_parent);
74    else if (curscr != 0)
75	touchwin(curscr);
76
77    returnCode(_nc_freewin(win));
78}
79