Home | History | Annotate | Line # | Download | only in libcurses
underscore.c revision 1.8.18.1 
      1 /*	$NetBSD: underscore.c,v 1.8.18.1 2007/01/21 17:43:36 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 #ifndef lint
     41 __RCSID("$NetBSD: underscore.c,v 1.8.18.1 2007/01/21 17:43:36 jdc Exp $");
     42 #endif				/* not lint */
     43 
     44 #include "curses.h"
     45 #include "curses_private.h"
     46 
     47 #ifndef _CURSES_USE_MACROS
     48 
     49 /*
     50  * underscore --
     51  *	Enter underscore mode on stdscr.
     52  */
     53 int
     54 underscore(void)
     55 {
     56 	return wunderscore(stdscr);
     57 }
     58 
     59 
     60 /*
     61  * underend --
     62  *	Exit underscore mode on stdscr.
     63  */
     64 int
     65 underend(void)
     66 {
     67 	return wunderend(stdscr);
     68 }
     69 
     70 #endif
     71 
     72 /*
     73  * wunderscore --
     74  *	Enter underscore mode.
     75  */
     76 int
     77 wunderscore(WINDOW *win)
     78 {
     79 	/* If can underscore, set the screen underscore bit. */
     80 	if ((__tc_us != NULL && __tc_ue != NULL) || __tc_uc != NULL) {
     81 #ifdef DEBUG
     82 		__CTRACE(__CTRACE_ATTR, "wunderscore\n");
     83 #endif
     84 		win->wattr |= __UNDERSCORE;
     85 	}
     86 	return (1);
     87 }
     88 
     89 /*
     90  * wunderend --
     91  *	Exit underscore mode.
     92  */
     93 int
     94 wunderend(WINDOW *win)
     95 {
     96 	if (__tc_ue != NULL) {
     97 #ifdef DEBUG
     98 		__CTRACE(__CTRACE_ATTR, "wunderend\n");
     99 #endif
    100 		win->wattr &= ~__UNDERSCORE;
    101 	}
    102         return 1;
    103 }
    104