Add ncurses 6.4

third_party/ncurses/lib_delwin.c

@@ -0,0 +1,102 @@
+/****************************************************************************
+ * Copyright 2020,2021 Thomas E. Dickey                                     *
+ * Copyright 1998-2008,2009 Free Software Foundation, Inc.                  *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
+ *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ *     and: Thomas E. Dickey                        1996-on                 *
+ *     and: Juergen Pfeifer                         2008                    *
+ ****************************************************************************/
+
+/*
+**	lib_delwin.c
+**
+**	The routine delwin().
+**
+*/
+
+#include "curses.priv.h"
+
+MODULE_ID("$Id: lib_delwin.c,v 1.24 2021/12/11 23:56:25 tom Exp $")
+
+static bool
+cannot_delete(WINDOW *win)
+{
+    bool result = TRUE;
+
+    if (IS_PAD(win)) {
+	result = FALSE;
+    } else {
+	WINDOWLIST *p;
+#ifdef USE_SP_WINDOWLIST
+	SCREEN *sp = _nc_screen_of(win);
+#endif
+
+	for (each_window(SP_PARM, p)) {
+	    if (&(p->win) == win) {
+		result = FALSE;
+	    } else if (IS_SUBWIN(&(p->win))
+		       && p->win._parent == win) {
+		result = TRUE;
+		break;
+	    }
+	}
+    }
+    return result;
+}
+
+NCURSES_EXPORT(int)
+delwin(WINDOW *win)
+{
+    int result = ERR;
+
+    T((T_CALLED("delwin(%p)"), (void *) win));
+
+    if (_nc_try_global(curses) == 0) {
+	if (win == 0
+	    || cannot_delete(win)) {
+	    result = ERR;
+	} else if (IS_PAD(win)) {
+	    win->_parent = NULL;
+	    result = _nc_freewin(win);
+	} else {
+#if NCURSES_SP_FUNCS
+	    SCREEN *sp = _nc_screen_of(win);
+#endif
+	    if (IS_SUBWIN(win)) {
+		touchwin(win->_parent);
+	    } else if (CurScreen(SP_PARM) != 0) {
+		touchwin(CurScreen(SP_PARM));
+	    }
+	    result = _nc_freewin(win);
+	}
+	_nc_unlock_global(curses);
+    }
+    returnCode(result);
+}