1 /* $NetBSD: underscore.c,v 1.12 2017/01/06 13:53:18 roy 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 1.12 2017/01/06 13:53:18 roy 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 50 return wunderscore(stdscr); 51 } 52 53 54 /* 55 * underend -- 56 * Exit underscore mode on stdscr. 57 */ 58 int 59 underend(void) 60 { 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 75 /* If can underscore, set the screen underscore bit. */ 76 if ((enter_underline_mode != NULL && exit_underline_mode != NULL) || 77 underline_char != NULL) 78 { 79 #ifdef DEBUG 80 __CTRACE(__CTRACE_ATTR, "wunderscore\n"); 81 #endif 82 win->wattr |= __UNDERSCORE; 83 } 84 return 1; 85 } 86 87 /* 88 * wunderend -- 89 * Exit underscore mode. 90 */ 91 int 92 wunderend(WINDOW *win) 93 { 94 95 if (exit_underline_mode != NULL) { 96 #ifdef DEBUG 97 __CTRACE(__CTRACE_ATTR, "wunderend\n"); 98 #endif 99 win->wattr &= ~__UNDERSCORE; 100 } 101 return 1; 102 } 103