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delwin.c revision 1.2 
      1 /*
      2  * Copyright (c) 1981 Regents of the University of California.
      3  * 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[] = "from: @(#)delwin.c	5.4 (Berkeley) 6/1/90";*/
     36 static char rcsid[] = "$Id: delwin.c,v 1.2 1993/08/01 18:35:45 mycroft Exp $";
     37 #endif /* not lint */
     38 
     39 # include	"curses.ext"
     40 
     41 /*
     42  *	This routine deletes a window and releases it back to the system.
     43  *
     44  */
     45 delwin(win)
     46 reg WINDOW	*win; {
     47 
     48 	reg int		i;
     49 	reg WINDOW	*wp, *np;
     50 
     51 	if (win->_orig == NULL) {
     52 		/*
     53 		 * If we are the original window, delete the space for
     54 		 * all the subwindows, and the array of space as well.
     55 		 */
     56 		for (i = 0; i < win->_maxy && win->_y[i]; i++)
     57 			free(win->_y[i]);
     58 		free(win->_firstch);
     59 		free(win->_lastch);
     60 		wp = win->_nextp;
     61 		while (wp != win) {
     62 			np = wp->_nextp;
     63 			delwin(wp);
     64 			wp = np;
     65 		}
     66 	}
     67 	else {
     68 		/*
     69 		 * If we are a subwindow, take ourselves out of the
     70 		 * list.  NOTE: if we are a subwindow, the minimum list
     71 		 * is orig followed by this subwindow, so there are
     72 		 * always at least 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->_y);
     79 	free(win);
     80 }
     81