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underscore.c revision 1.10 
      1 /*	$NetBSD: underscore.c,v 1.10 2008/04/28 20:23:01 martin 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 1.10 2008/04/28 20:23:01 martin 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 }
     97