1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved	*/
29 
30 /*
31  * University Copyright- Copyright (c) 1982, 1986, 1988
32  * The Regents of the University of California
33  * All Rights Reserved
34  *
35  * University Acknowledgment- Portions of this document are derived from
36  * software developed by the University of California, Berkeley, and its
37  * contributors.
38  */
39 
40 #pragma ident	"%Z%%M%	%I%	%E% SMI"
41 
42 /*LINTLIBRARY*/
43 
44 #include	<stdlib.h>
45 #include	<sys/types.h>
46 #include	"curses_inc.h"
47 
48 /* This routine deletes a _window and releases it back to the system. */
49 
50 int
delwin(WINDOW * win)51 delwin(WINDOW *win)
52 {
53 	int		i;
54 	WINDOW		*par;
55 
56 	/* If we have children don't delte the window. */
57 	if (win->_ndescs > 0)
58 		return (ERR);
59 
60 	/*
61 	 * If window is a pad, delete the padwin associated with it.
62 	 * NOTE: We shouldn't care that the recursive call will decrement
63 	 * ndescs for this window, since the window will be deleted anyhow.
64 	 */
65 
66 	if (win->_padwin) {
67 		win->_padwin->_maxy = win->_maxy;
68 		(void) delwin(win->_padwin);
69 	}
70 	if (win->_parent == NULL) {
71 		/* Delete all the memory associated with this window. */
72 		for (i = win->_maxy; i-- > 0; ) {
73 			free((char *)win->_y[i]);
74 #ifdef	_VR3_COMPAT_CODE
75 			if (_y16update)
76 				free((char *)win->_y16[i]);
77 #endif	/* _VR3_COMPAT_CODE */
78 		}
79 	} else {
80 	/*
81 	 * We are a subwin and we don't want to delete the memory since
82 	 * it's shared by other windows.  We do want to decrement the
83 	 * descendant count so that if there are no children left to a
84 	 * particular window winsdelln.c will run in fast mode (look there).
85 	 */
86 		for (par = win->_parent; par != NULL; par = par->_parent)
87 			par->_ndescs--;
88 	}
89 
90 #ifdef	_VR3_COMPAT_CODE
91 	if (_y16update)
92 		free((char *)win->_y16);
93 #endif	/* _VR3_COMPAT_CODE */
94 
95 	free((char *)win->_y);
96 	free((char *)win->_firstch);
97 	free((char *)win);
98 	return (OK);
99 }
100