1 /* $NetBSD: underscore.c,v 1.6 2000/12/19 21:34:24 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 1.6 2000/12/19 21:34:24 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("wunderscore\n"); 83 #endif 84 win->wattr |= __UNDERSCORE; 85 if ((win->wattr & __COLOR) && (__nca & __UNDERSCORE)) { 86 win->wattr &= ~__COLOR; 87 } 88 } 89 return (1); 90 } 91 92 /* 93 * wunderend -- 94 * Exit underscore mode. 95 */ 96 int 97 wunderend(WINDOW *win) 98 { 99 if (__tc_ue != NULL) { 100 #ifdef DEBUG 101 __CTRACE("wunderuend\n"); 102 #endif 103 win->wattr &= ~__UNDERSCORE; 104 } 105 return 1; 106 } 107