lib/libcurses/timeout.c

   1 /*      $NetBSD: timeout.c,v 1.8 2009/11/04 21:24:57 dsl 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 1.8 2009/11/04 21:24:57 dsl 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         wtimeout(stdscr, delay);
  50 }
  51
  52 #endif
  53
  54 /*
  55  * wtimeout --
  56  *      Set the getch() delay for a window.
  57  */
  58 void
  59 wtimeout(WINDOW *win, int delay)
  60 {
  61
  62         if (delay < 0)
  63                 win->delay = -1;
  64         else if (!delay)
  65                 win->delay = delay;
  66         else {
  67                 /*
  68                  * 1. VTIME is a char
  69                  * 2. timeout granularity is ms but VTIME is 0.1s
  70                  */
  71                 if (delay > 25500)
  72                         win->delay = 255;
  73                 else
  74                         win->delay = (delay - 1)/ 100 + 1;
  75         }
  76 }