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underscore.c revision 1.4 
      1 /*	$NetBSD: underscore.c,v 1.4 2000/04/15 13:17:05 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  * 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 "curses.h"
     40 #include "curses_private.h"
     41 
     42 #ifndef _CURSES_USE_MACROS
     43 
     44 /*
     45  * underscore
     46  *	Enter underscore mode on stdscr.
     47  */
     48 int
     49 underscore(void)
     50 {
     51 	return wunderscore(stdscr);
     52 }
     53 
     54 
     55 /*
     56  * underend --
     57  *	Exit underscore mode on stdscr.
     58  */
     59 int
     60 underend(void)
     61 {
     62 	return wunderend(stdscr);
     63 }
     64 
     65 #endif
     66 
     67 /*
     68  * wunderscore
     69  *	Enter underscore mode.
     70  */
     71 int
     72 wunderscore(WINDOW *win)
     73 {
     74 	/* If can underscore, set the screen underscore bit. */
     75 	if ((US != NULL && UE != NULL) || UC != NULL) {
     76 #ifdef DEBUG
     77 		__CTRACE("wunderscore\n");
     78 #endif
     79 		win->wattr |= __UNDERSCORE;
     80 		if ((win->wattr & __COLOR) && (__nca & __UNDERSCORE)) {
     81 			win->wattr &= ~__COLOR;
     82 		}
     83 	}
     84 	return (1);
     85 }
     86 
     87 /*
     88  * wunderend --
     89  *	Exit underscore mode.
     90  */
     91 int
     92 wunderend(WINDOW *win)
     93 {
     94 	if (UE != NULL) {
     95 #ifdef DEBUG
     96 		__CTRACE("wunderuend\n");
     97 #endif
     98 		win->wattr &= ~__UNDERSCORE;
     99 	}
    100         return 1;
    101 }
    102