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underscore.c revision 1.3 
      1 /*	$NetBSD: underscore.c,v 1.3 2000/04/12 21:44:42 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 "curses.h"
     40 #include "curses_private.h"
     41 
     42 /*
     43  * wunderscore
     44  *	Enter underscore mode.
     45  */
     46 int
     47 wunderscore(win)
     48 	WINDOW *win;
     49 {
     50 	/* If can underscore, set the screen underscore bit. */
     51 	if ((US != NULL && UE != NULL) || UC != NULL) {
     52 #ifdef DEBUG
     53 		__CTRACE("wunderscore\n");
     54 #endif
     55 		win->wattr |= __UNDERSCORE;
     56 		if ((win->wattr & __COLOR) && (__nca & __UNDERSCORE)) {
     57 			win->wattr &= ~__COLOR;
     58 		}
     59 	}
     60 	return (1);
     61 }
     62 
     63 /*
     64  * wunderend --
     65  *	Exit underscore mode.
     66  */
     67 int
     68 wunderend(win)
     69 	WINDOW *win;
     70 {
     71 	if (UE != NULL) {
     72 #ifdef DEBUG
     73 		__CTRACE("wunderuend\n");
     74 #endif
     75 		win->wattr &= ~__UNDERSCORE;
     76 	}
     77         return 1;
     78 }
     79