1 /****************************************************************************
2 * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc. *
3 * *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
11 * *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
14 * *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
22 * *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
26 * authorization. *
27 ****************************************************************************/
28
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 * and: Thomas E. Dickey 2002 *
33 ****************************************************************************/
34
35 /*
36 * lib_kernel.c
37 *
38 * Misc. low-level routines:
39 * erasechar()
40 * killchar()
41 * flushinp()
42 *
43 * The baudrate() and delay_output() functions could logically live here,
44 * but are in other modules to reduce the static-link size of programs
45 * that use only these facilities.
46 */
47
48 #include <curses.priv.h>
49 #include <term.h> /* cur_term */
50
51 MODULE_ID("$Id: lib_kernel.c,v 1.24 2004/05/08 17:11:21 tom Exp $")
52
53 static int
_nc_vdisable(void)54 _nc_vdisable(void)
55 {
56 int value = -1;
57 #if defined(_POSIX_VDISABLE) && HAVE_UNISTD_H
58 value = _POSIX_VDISABLE;
59 #endif
60 #if defined(_PC_VDISABLE)
61 if (value == -1) {
62 value = fpathconf(0, _PC_VDISABLE);
63 if (value == -1) {
64 value = 0377;
65 }
66 }
67 #elif defined(VDISABLE)
68 if (value == -1)
69 value = VDISABLE;
70 #endif
71 return value;
72 }
73
74 /*
75 * erasechar()
76 *
77 * Return erase character as given in cur_term->Ottyb.
78 *
79 */
80
81 NCURSES_EXPORT(char)
erasechar(void)82 erasechar(void)
83 {
84 int result = ERR;
85 T((T_CALLED("erasechar()")));
86
87 if (cur_term != 0) {
88 #ifdef TERMIOS
89 result = cur_term->Ottyb.c_cc[VERASE];
90 if (result == _nc_vdisable())
91 result = ERR;
92 #else
93 result = cur_term->Ottyb.sg_erase;
94 #endif
95 }
96 returnCode(result);
97 }
98
99 /*
100 * killchar()
101 *
102 * Return kill character as given in cur_term->Ottyb.
103 *
104 */
105
106 NCURSES_EXPORT(char)
killchar(void)107 killchar(void)
108 {
109 int result = ERR;
110 T((T_CALLED("killchar()")));
111
112 if (cur_term != 0) {
113 #ifdef TERMIOS
114 result = cur_term->Ottyb.c_cc[VKILL];
115 if (result == _nc_vdisable())
116 result = ERR;
117 #else
118 result = cur_term->Ottyb.sg_kill;
119 #endif
120 }
121 returnCode(result);
122 }
123
124 /*
125 * flushinp()
126 *
127 * Flush any input on cur_term->Filedes
128 *
129 */
130
131 NCURSES_EXPORT(int)
flushinp(void)132 flushinp(void)
133 {
134 T((T_CALLED("flushinp()")));
135
136 if (cur_term != 0) {
137 #ifdef TERMIOS
138 tcflush(cur_term->Filedes, TCIFLUSH);
139 #else
140 errno = 0;
141 do {
142 ioctl(cur_term->Filedes, TIOCFLUSH, 0);
143 } while
144 (errno == EINTR);
145 #endif
146 if (SP) {
147 SP->_fifohead = -1;
148 SP->_fifotail = 0;
149 SP->_fifopeek = 0;
150 }
151 returnCode(OK);
152 }
153 returnCode(ERR);
154 }
155