1 /* $NetBSD: delwin.c,v 1.22 2021/09/06 07:03:49 rin 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)delwin.c 8.2 (Berkeley) 5/4/94"; 36 #else 37 __RCSID("$NetBSD: delwin.c,v 1.22 2021/09/06 07:03:49 rin Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <stdlib.h> 42 43 #include "curses.h" 44 #include "curses_private.h" 45 46 /* 47 * delwin -- 48 * Delete a window and release it back to the system. 49 */ 50 int 51 delwin(WINDOW *win) 52 { 53 WINDOW *wp, *np; 54 struct __winlist *wl, *pwl; 55 SCREEN *screen; 56 57 __CTRACE(__CTRACE_WINDOW, "delwin(%p)\n", win); 58 59 if (win == NULL) 60 return OK; 61 62 /* 63 * Free any storage used by non-spacing characters in the window. 64 */ 65 #ifdef HAVE_WCHAR 66 __cursesi_win_free_nsp(win); 67 #endif 68 69 if (win->orig == NULL) { 70 /* 71 * If we are the original window, delete the space for all 72 * the subwindows and the window space. 73 */ 74 free(win->wspace); 75 wp = win->nextp; 76 while (wp != win) { 77 np = wp->nextp; 78 delwin(wp); 79 wp = np; 80 } 81 /* Remove ourselves from the list of windows on the screen. */ 82 pwl = NULL; 83 screen = win->screen; 84 for (wl = screen->winlistp; wl; pwl = wl, wl = wl->nextp) { 85 if (wl->winp != win) 86 continue; 87 if (pwl != NULL) 88 pwl->nextp = wl->nextp; 89 else 90 screen->winlistp = wl->nextp; 91 free(wl); 92 break; 93 } 94 } else { 95 /* 96 * If we are a subwindow, take ourselves out of the list. 97 * NOTE: if we are a subwindow, the minimum list is orig 98 * followed by this subwindow, so there are always at least 99 * two windows in the list. 100 */ 101 for (wp = win->nextp; wp->nextp != win; wp = wp->nextp) 102 continue; 103 wp->nextp = win->nextp; 104 } 105 free(win->lspace); 106 free(win->alines); 107 if (win == _cursesi_screen->curscr) 108 _cursesi_screen->curscr = NULL; 109 if (win == _cursesi_screen->stdscr) 110 _cursesi_screen->stdscr = NULL; 111 if (win == _cursesi_screen->__virtscr) 112 _cursesi_screen->__virtscr = NULL; 113 if (win->fp) 114 fclose(win->fp); 115 free(win->buf); 116 free(win); 117 return OK; 118 } 119