1 /****************************************************************************
2  * Copyright (c) 1998-2008,2009 Free Software Foundation, Inc.              *
3  *                                                                          *
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5  * copy of this software and associated documentation files (the            *
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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  *                                                                          *
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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.   *
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21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22  *                                                                          *
23  * Except as contained in this notice, the name(s) of the above copyright   *
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28 
29 /****************************************************************************
30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32  *     and: Thomas E. Dickey                        1996-on                 *
33  *     and: Juergen Pfeifer                         2008                    *
34  ****************************************************************************/
35 
36 /*
37 **	lib_delwin.c
38 **
39 **	The routine delwin().
40 **
41 */
42 
43 #include <curses.priv.h>
44 
45 MODULE_ID("$Id: lib_delwin.c,v 1.20 2009/10/24 22:02:14 tom Exp $")
46 
47 static bool
48 cannot_delete(WINDOW *win)
49 {
50     WINDOWLIST *p;
51     bool result = TRUE;
52 #ifdef USE_SP_WINDOWLIST
53     SCREEN *sp = _nc_screen_of(win);
54 #endif
55 
56     for (each_window(SP_PARM, p)) {
57 	if (&(p->win) == win) {
58 	    result = FALSE;
59 	} else if ((p->win._flags & _SUBWIN) != 0
60 		   && p->win._parent == win) {
61 	    result = TRUE;
62 	    break;
63 	}
64     }
65     return result;
66 }
67 
68 NCURSES_EXPORT(int)
69 delwin(WINDOW *win)
70 {
71     int result = ERR;
72 
73     T((T_CALLED("delwin(%p)"), (void *) win));
74 
75     if (_nc_try_global(curses) == 0) {
76 	if (win == 0
77 	    || cannot_delete(win)) {
78 	    result = ERR;
79 	} else {
80 #if NCURSES_SP_FUNCS
81 	    SCREEN *sp = _nc_screen_of(win);
82 #endif
83 	    if (win->_flags & _SUBWIN)
84 		touchwin(win->_parent);
85 	    else if (CurScreen(SP_PARM) != 0)
86 		touchwin(CurScreen(SP_PARM));
87 
88 	    result = _nc_freewin(win);
89 	}
90 	_nc_unlock_global(curses);
91     }
92     returnCode(result);
93 }
94