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timeout.c revision 1.10 
      1 /*	$NetBSD: timeout.c,v 1.10 2024/12/23 02:58:04 blymn Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Julian Coleman.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 __RCSID("$NetBSD: timeout.c,v 1.10 2024/12/23 02:58:04 blymn Exp $");
     35 #endif				/* not lint */
     36 
     37 #include "curses.h"
     38 #include "curses_private.h"
     39 
     40 #ifndef _CURSES_USE_MACROS
     41 
     42 /*
     43  * timeout --
     44  *	Set the getch() delay for stdscr.
     45  */
     46 void
     47 timeout(int delay)
     48 {
     49 
     50 	wtimeout(stdscr, delay);
     51 }
     52 
     53 #endif
     54 
     55 /*
     56  * wtimeout --
     57  *	Set the getch() delay for a window.
     58  */
     59 void
     60 wtimeout(WINDOW *win, int delay)
     61 {
     62 
     63 	if (__predict_false(win == NULL))
     64 		return;
     65 
     66 	if (delay < 0)
     67 		win->delay = -1;
     68 	else if (!delay)
     69 		win->delay = delay;
     70 	else {
     71 		/*
     72 		 * 1. VTIME is a char
     73 		 * 2. timeout granularity is ms but VTIME is 0.1s
     74 		 */
     75 		if (delay > 25500)
     76 			win->delay = 255;
     77 		else
     78 			win->delay = (delay - 1)/ 100 + 1;
     79 	}
     80 }
     81