lib/libcurses/underscore.c

   1 /*      $NetBSD: underscore.c,v 1.9 2007/01/21 13:25:36 jdc 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: underscore.c,v 1.9 2007/01/21 13:25:36 jdc Exp $");
  35 #endif                          /* not lint */
  36
  37 #include "curses.h"
  38 #include "curses_private.h"
  39
  40 #ifndef _CURSES_USE_MACROS
  41
  42 /*
  43  * underscore --
  44  *      Enter underscore mode on stdscr.
  45  */
  46 int
  47 underscore(void)
  48 {
  49         return wunderscore(stdscr);
  50 }
  51
  52
  53 /*
  54  * underend --
  55  *      Exit underscore mode on stdscr.
  56  */
  57 int
  58 underend(void)
  59 {
  60         return wunderend(stdscr);
  61 }
  62
  63 #endif
  64
  65 /*
  66  * wunderscore --
  67  *      Enter underscore mode.
  68  */
  69 int
  70 wunderscore(WINDOW *win)
  71 {
  72         /* If can underscore, set the screen underscore bit. */
  73         if ((__tc_us != NULL && __tc_ue != NULL) || __tc_uc != NULL) {
  74 #ifdef DEBUG
  75                 __CTRACE(__CTRACE_ATTR, "wunderscore\n");
  76 #endif
  77                 win->wattr |= __UNDERSCORE;
  78         }
  79         return (1);
  80 }
  81
  82 /*
  83  * wunderend --
  84  *      Exit underscore mode.
  85  */
  86 int
  87 wunderend(WINDOW *win)
  88 {
  89         if (__tc_ue != NULL) {
  90 #ifdef DEBUG
  91                 __CTRACE(__CTRACE_ATTR, "wunderend\n");
  92 #endif
  93                 win->wattr &= ~__UNDERSCORE;
  94         }
  95         return 1;
  96 }