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delwin.c revision 1.12 
      1 /*	$NetBSD: delwin.c,v 1.12 2003/07/30 11:19:00 dsl Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1981, 1993, 1994
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)delwin.c	8.2 (Berkeley) 5/4/94";
     40 #else
     41 __RCSID("$NetBSD: delwin.c,v 1.12 2003/07/30 11:19:00 dsl Exp $");
     42 #endif
     43 #endif				/* not lint */
     44 
     45 #include <stdlib.h>
     46 
     47 #include "curses.h"
     48 #include "curses_private.h"
     49 
     50 /*
     51  * delwin --
     52  *	Delete a window and release it back to the system.
     53  */
     54 int
     55 delwin(WINDOW *win)
     56 {
     57 	WINDOW *wp, *np;
     58 	struct __winlist *wl, *pwl;
     59 	SCREEN *screen;
     60 
     61 	if (win->orig == NULL) {
     62 		/*
     63 		 * If we are the original window, delete the space for all
     64 		 * the subwindows and the window space.
     65 		 */
     66 		free(win->wspace);
     67 		wp = win->nextp;
     68 		while (wp != win) {
     69 			np = wp->nextp;
     70 			delwin(wp);
     71 			wp = np;
     72 		}
     73 		/* Remove ourselves from the list of windows on the screen. */
     74 		pwl = NULL;
     75 		screen = win->screen;
     76 		for (wl = screen->winlistp; wl; pwl = wl, wl = wl->nextp) {
     77 			if (wl->winp != win)
     78 				continue;
     79 			if (pwl != NULL)
     80 				pwl->nextp = wl->nextp;
     81 			else
     82 				screen->winlistp = wl->nextp;
     83 			free(wl);
     84 			break;
     85 		}
     86 	} else {
     87 		/*
     88 		 * If we are a subwindow, take ourselves out of the list.
     89 		 * NOTE: if we are a subwindow, the minimum list is orig
     90 		 * followed by this subwindow, so there are always at least
     91 		 * two windows in the list.
     92 		 */
     93 		for (wp = win->nextp; wp->nextp != win; wp = wp->nextp)
     94 			continue;
     95 		wp->nextp = win->nextp;
     96 	}
     97 	free(win->lspace);
     98 	free(win->lines);
     99 	free(win);
    100 	return (OK);
    101 }
    102