1/****************************************************************************
2 * Copyright (c) 1998-2001,2002 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 1998 on                                        *
33 ****************************************************************************/
34
35/*
36 *	raw.c
37 *
38 *	Routines:
39 *		raw()
40 *		cbreak()
41 *		noraw()
42 *		nocbreak()
43 *		qiflush()
44 *		noqiflush()
45 *		intrflush()
46 *
47 */
48
49#include <curses.priv.h>
50#include <term.h>		/* cur_term */
51
52MODULE_ID("$Id: lib_raw.c,v 1.13 2002/07/06 22:00:45 tom Exp $")
53
54#if SVR4_TERMIO && !defined(_POSIX_SOURCE)
55#define _POSIX_SOURCE
56#endif
57
58#if HAVE_SYS_TERMIO_H
59#include <sys/termio.h>		/* needed for ISC */
60#endif
61
62#ifdef __EMX__
63#include <io.h>
64#define _nc_setmode(mode) setmode(SP->_ifd, mode)
65#else
66#define _nc_setmode(mode)	/* nothing */
67#endif
68
69#define COOKED_INPUT	(IXON|BRKINT|PARMRK)
70
71#ifdef TRACE
72#define BEFORE(N)	if (_nc_tracing&TRACE_BITS) _tracef("%s before bits: %s", N, _nc_tracebits())
73#define AFTER(N)	if (_nc_tracing&TRACE_BITS) _tracef("%s after bits: %s", N, _nc_tracebits())
74#else
75#define BEFORE(s)
76#define AFTER(s)
77#endif /* TRACE */
78
79NCURSES_EXPORT(int)
80raw(void)
81{
82    int result = ERR;
83
84    T((T_CALLED("raw()")));
85
86    if (SP != 0 && cur_term != 0) {
87	TTY buf;
88
89	BEFORE("raw");
90	_nc_setmode(O_BINARY);
91
92	buf = cur_term->Nttyb;
93#ifdef TERMIOS
94	buf.c_lflag &= ~(ICANON | ISIG | IEXTEN);
95	buf.c_iflag &= ~(COOKED_INPUT);
96	buf.c_cc[VMIN] = 1;
97	buf.c_cc[VTIME] = 0;
98#else
99	buf.sg_flags |= RAW;
100#endif
101	if ((result = _nc_set_tty_mode(&buf)) == OK) {
102	    SP->_raw = TRUE;
103	    SP->_cbreak = 1;
104	    cur_term->Nttyb = buf;
105	}
106	AFTER("raw");
107    }
108    returnCode(result);
109}
110
111NCURSES_EXPORT(int)
112cbreak(void)
113{
114    int result = ERR;
115
116    T((T_CALLED("cbreak()")));
117
118    if (SP != 0 && cur_term != 0) {
119	TTY buf;
120
121	BEFORE("cbreak");
122	_nc_setmode(O_BINARY);
123
124	buf = cur_term->Nttyb;
125#ifdef TERMIOS
126	buf.c_lflag &= ~ICANON;
127	buf.c_iflag &= ~ICRNL;
128	buf.c_lflag |= ISIG;
129	buf.c_cc[VMIN] = 1;
130	buf.c_cc[VTIME] = 0;
131#else
132	buf.sg_flags |= CBREAK;
133#endif
134	if ((result = _nc_set_tty_mode(&buf)) == OK) {
135	    SP->_cbreak = 1;
136	    cur_term->Nttyb = buf;
137	}
138	AFTER("cbreak");
139    }
140    returnCode(result);
141}
142
143/*
144 * Note:
145 * this implementation may be wrong.  See the comment under intrflush().
146 */
147NCURSES_EXPORT(void)
148qiflush(void)
149{
150    int result = ERR;
151
152    T((T_CALLED("qiflush()")));
153
154    if (cur_term != 0) {
155	TTY buf;
156
157	BEFORE("qiflush");
158	buf = cur_term->Nttyb;
159#ifdef TERMIOS
160	buf.c_lflag &= ~(NOFLSH);
161	result = _nc_set_tty_mode(&buf);
162#else
163	/* FIXME */
164#endif
165	if (result == OK)
166	    cur_term->Nttyb = buf;
167	AFTER("qiflush");
168    }
169    returnVoid;
170}
171
172NCURSES_EXPORT(int)
173noraw(void)
174{
175    int result = ERR;
176
177    T((T_CALLED("noraw()")));
178
179    if (SP != 0 && cur_term != 0) {
180	TTY buf;
181
182	BEFORE("noraw");
183	_nc_setmode(O_TEXT);
184
185	buf = cur_term->Nttyb;
186#ifdef TERMIOS
187	buf.c_lflag |= ISIG | ICANON |
188	    (cur_term->Ottyb.c_lflag & IEXTEN);
189	buf.c_iflag |= COOKED_INPUT;
190#else
191	buf.sg_flags &= ~(RAW | CBREAK);
192#endif
193	if ((result = _nc_set_tty_mode(&buf)) == OK) {
194	    SP->_raw = FALSE;
195	    SP->_cbreak = 0;
196	    cur_term->Nttyb = buf;
197	}
198	AFTER("noraw");
199    }
200    returnCode(result);
201}
202
203NCURSES_EXPORT(int)
204nocbreak(void)
205{
206    int result = ERR;
207
208    T((T_CALLED("nocbreak()")));
209
210    if (SP != 0 && cur_term != 0) {
211	TTY buf;
212
213	BEFORE("nocbreak");
214	_nc_setmode(O_TEXT);
215
216	buf = cur_term->Nttyb;
217#ifdef TERMIOS
218	buf.c_lflag |= ICANON;
219	buf.c_iflag |= ICRNL;
220#else
221	buf.sg_flags &= ~CBREAK;
222#endif
223	if ((result = _nc_set_tty_mode(&buf)) == OK) {
224	    SP->_cbreak = 0;
225	    cur_term->Nttyb = buf;
226	}
227	AFTER("nocbreak");
228    }
229    returnCode(result);
230}
231
232/*
233 * Note:
234 * this implementation may be wrong.  See the comment under intrflush().
235 */
236NCURSES_EXPORT(void)
237noqiflush(void)
238{
239    int result = ERR;
240
241    T((T_CALLED("noqiflush()")));
242
243    if (cur_term != 0) {
244	TTY buf;
245
246	BEFORE("noqiflush");
247	buf = cur_term->Nttyb;
248#ifdef TERMIOS
249	buf.c_lflag |= NOFLSH;
250	result = _nc_set_tty_mode(&buf);
251#else
252	/* FIXME */
253#endif
254	if (result == OK) {
255	    cur_term->Nttyb = buf;
256	}
257	AFTER("noqiflush");
258    }
259    returnVoid;
260}
261
262/*
263 * This call does the same thing as the qiflush()/noqiflush() pair.  We know
264 * for certain that SVr3 intrflush() tweaks the NOFLSH bit; on the other hand,
265 * the match (in the SVr4 man pages) between the language describing NOFLSH in
266 * termio(7) and the language describing qiflush()/noqiflush() in
267 * curs_inopts(3x) is too exact to be coincidence.
268 */
269NCURSES_EXPORT(int)
270intrflush(WINDOW *win GCC_UNUSED, bool flag)
271{
272    int result = ERR;
273
274    T((T_CALLED("intrflush(%d)"), flag));
275
276    if (cur_term != 0) {
277	TTY buf;
278
279	BEFORE("intrflush");
280	buf = cur_term->Nttyb;
281#ifdef TERMIOS
282	if (flag)
283	    buf.c_lflag &= ~(NOFLSH);
284	else
285	    buf.c_lflag |= (NOFLSH);
286	result = _nc_set_tty_mode(&buf);
287#else
288	/* FIXME */
289#endif
290	if (result == OK) {
291	    cur_term->Nttyb = buf;
292	}
293	AFTER("intrflush");
294    }
295    returnCode(result);
296}
297