lib_tracebits.c revision 174994 
1/****************************************************************************
2 * Copyright (c) 1998-2006,2007 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                        1996-on                 *
33 ****************************************************************************/
34
35#include <curses.priv.h>
36#include <term.h>		/* cur_term */
37
38MODULE_ID("$Id: lib_tracebits.c,v 1.15 2007/06/30 16:14:20 tom Exp $")
39
40#if SVR4_TERMIO && !defined(_POSIX_SOURCE)
41#define _POSIX_SOURCE
42#endif
43
44#if HAVE_SYS_TERMIO_H
45#include <sys/termio.h>		/* needed for ISC */
46#endif
47
48#ifdef __EMX__
49#include <io.h>
50#endif
51
52/* may be undefined if we're using termio.h */
53#ifndef TOSTOP
54#define TOSTOP 0
55#endif
56
57#ifndef IEXTEN
58#define IEXTEN 0
59#endif
60
61#ifndef ONLCR
62#define ONLCR 0
63#endif
64
65#ifndef OCRNL
66#define OCRNL 0
67#endif
68
69#ifndef ONOCR
70#define ONOCR 0
71#endif
72
73#ifndef ONLRET
74#define ONLRET 0
75#endif
76
77#ifdef TRACE
78
79typedef struct {
80    unsigned int val;
81    const char *name;
82} BITNAMES;
83
84static void
85lookup_bits(char *buf, const BITNAMES * table, const char *label, unsigned int val)
86{
87    const BITNAMES *sp;
88
89    (void) strcat(buf, label);
90    (void) strcat(buf, ": {");
91    for (sp = table; sp->name; sp++)
92	if (sp->val != 0
93	    && (val & sp->val) == sp->val) {
94	    (void) strcat(buf, sp->name);
95	    (void) strcat(buf, ", ");
96	}
97    if (buf[strlen(buf) - 2] == ',')
98	buf[strlen(buf) - 2] = '\0';
99    (void) strcat(buf, "} ");
100}
101
102NCURSES_EXPORT(char *)
103_nc_trace_ttymode(TTY * tty)
104/* describe the state of the terminal control bits exactly */
105{
106    char *buf;
107
108#ifdef TERMIOS
109    static const BITNAMES iflags[] =
110    {
111	{BRKINT, "BRKINT"},
112	{IGNBRK, "IGNBRK"},
113	{IGNPAR, "IGNPAR"},
114	{PARMRK, "PARMRK"},
115	{INPCK, "INPCK"},
116	{ISTRIP, "ISTRIP"},
117	{INLCR, "INLCR"},
118	{IGNCR, "IGNC"},
119	{ICRNL, "ICRNL"},
120	{IXON, "IXON"},
121	{IXOFF, "IXOFF"},
122	{0, NULL}
123#define ALLIN	(BRKINT|IGNBRK|IGNPAR|PARMRK|INPCK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IXOFF)
124    }, oflags[] =
125    {
126	{OPOST, "OPOST"},
127	{OFLAGS_TABS, "XTABS"},
128	{ONLCR, "ONLCR"},
129	{OCRNL, "OCRNL"},
130	{ONOCR, "ONOCR"},
131	{ONLRET, "ONLRET"},
132	{0, NULL}
133#define ALLOUT	(OPOST|OFLAGS_TABS|ONLCR|OCRNL|ONOCR|ONLRET)
134    }, cflags[] =
135    {
136	{CLOCAL, "CLOCAL"},
137	{CREAD, "CREAD"},
138	{CSTOPB, "CSTOPB"},
139#if !defined(CS5) || !defined(CS8)
140	{CSIZE, "CSIZE"},
141#endif
142	{HUPCL, "HUPCL"},
143	{PARENB, "PARENB"},
144	{PARODD | PARENB, "PARODD"},	/* concession to readability */
145	{0, NULL}
146#define ALLCTRL	(CLOCAL|CREAD|CSIZE|CSTOPB|HUPCL|PARENB|PARODD)
147    }, lflags[] =
148    {
149	{ECHO, "ECHO"},
150	{ECHOE | ECHO, "ECHOE"},	/* concession to readability */
151	{ECHOK | ECHO, "ECHOK"},	/* concession to readability */
152	{ECHONL, "ECHONL"},
153	{ICANON, "ICANON"},
154	{ISIG, "ISIG"},
155	{NOFLSH, "NOFLSH"},
156	{TOSTOP, "TOSTOP"},
157	{IEXTEN, "IEXTEN"},
158	{0, NULL}
159#define ALLLOCAL	(ECHO|ECHONL|ICANON|ISIG|NOFLSH|TOSTOP|IEXTEN)
160    };
161
162    buf = _nc_trace_buf(0,
163			8 + sizeof(iflags) +
164			8 + sizeof(oflags) +
165			8 + sizeof(cflags) +
166			8 + sizeof(lflags) +
167			8);
168
169    if (tty->c_iflag & ALLIN)
170	lookup_bits(buf, iflags, "iflags", tty->c_iflag);
171
172    if (tty->c_oflag & ALLOUT)
173	lookup_bits(buf, oflags, "oflags", tty->c_oflag);
174
175    if (tty->c_cflag & ALLCTRL)
176	lookup_bits(buf, cflags, "cflags", tty->c_cflag);
177
178#if defined(CS5) && defined(CS8)
179    {
180	static struct {
181	    const char *name;
182	    int value;
183	} csizes[] = {
184	    {
185		"CS5 ", CS5
186	    },
187#ifdef CS6
188	    {
189		"CS6 ", CS6
190	    },
191#endif
192#ifdef CS7
193	    {
194		"CS7 ", CS7
195	    },
196#endif
197	    {
198		"CS8 ", CS8
199	    },
200	};
201	const char *result = "CSIZE? ";
202	int value = (tty->c_cflag & CSIZE);
203	unsigned n;
204
205	if (value != 0) {
206	    for (n = 0; n < SIZEOF(csizes); n++) {
207		if (csizes[n].value == value) {
208		    result = csizes[n].name;
209		    break;
210		}
211	    }
212	}
213	strcat(buf, result);
214    }
215#endif
216
217    if (tty->c_lflag & ALLLOCAL)
218	lookup_bits(buf, lflags, "lflags", tty->c_lflag);
219
220#else
221    /* reference: ttcompat(4M) on SunOS 4.1 */
222#ifndef EVENP
223#define EVENP 0
224#endif
225#ifndef LCASE
226#define LCASE 0
227#endif
228#ifndef LLITOUT
229#define LLITOUT 0
230#endif
231#ifndef ODDP
232#define ODDP 0
233#endif
234#ifndef TANDEM
235#define TANDEM 0
236#endif
237
238    static const BITNAMES cflags[] =
239    {
240	{CBREAK, "CBREAK"},
241	{CRMOD, "CRMOD"},
242	{ECHO, "ECHO"},
243	{EVENP, "EVENP"},
244	{LCASE, "LCASE"},
245	{LLITOUT, "LLITOUT"},
246	{ODDP, "ODDP"},
247	{RAW, "RAW"},
248	{TANDEM, "TANDEM"},
249	{XTABS, "XTABS"},
250	{0, NULL}
251#define ALLCTRL	(CBREAK|CRMOD|ECHO|EVENP|LCASE|LLITOUT|ODDP|RAW|TANDEM|XTABS)
252    };
253
254    buf = _nc_trace_buf(0,
255			8 + sizeof(cflags));
256
257    if (tty->sg_flags & ALLCTRL) {
258	lookup_bits(buf, cflags, "cflags", tty->sg_flags);
259    }
260#endif
261    return (buf);
262}
263
264NCURSES_EXPORT(char *)
265_nc_tracebits(void)
266{
267    return _nc_trace_ttymode(&(cur_term->Nttyb));
268}
269#else
270empty_module(_nc_tracebits)
271#endif /* TRACE */
272