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delwin.c revision 1.6 
      1 /*
      2  * Copyright (c) 1981, 1993, 1994
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 static char sccsid[] = "@(#)delwin.c	8.2 (Berkeley) 5/4/94";
     36 #endif	/* not lint */
     37 
     38 #include <stdlib.h>
     39 
     40 #include "curses.h"
     41 
     42 /*
     43  * delwin --
     44  *	Delete a window and release it back to the system.
     45  */
     46 int
     47 delwin(win)
     48 	register WINDOW *win;
     49 {
     50 
     51 	register WINDOW *wp, *np;
     52 
     53 	if (win->orig == NULL) {
     54 		/*
     55 		 * If we are the original window, delete the space for all
     56 		 * the subwindows, the line space and the window space.
     57 		 */
     58 		free(win->lspace);
     59 		free(win->wspace);
     60 		free(win->lines);
     61 		wp = win->nextp;
     62 		while (wp != win) {
     63 			np = wp->nextp;
     64 			delwin(wp);
     65 			wp = np;
     66 		}
     67 	} else {
     68 		/*
     69 		 * If we are a subwindow, take ourselves out of the list.
     70 		 * NOTE: if we are a subwindow, the minimum list is orig
     71 		 * followed by this subwindow, so there are always at least
     72 		 * two windows in the list.
     73 		 */
     74 		for (wp = win->nextp; wp->nextp != win; wp = wp->nextp)
     75 			continue;
     76 		wp->nextp = win->nextp;
     77 	}
     78 	free(win);
     79 	return (OK);
     80 }
     81