1 /****************************************************************************
2  * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc.              *
3  *                                                                          *
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5  * copy of this software and associated documentation files (the            *
6  * "Software"), to deal in the Software without restriction, including      *
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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   *
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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 
38 MODULE_ID("$Id: lib_tracebits.c,v 1.17 2008/08/03 16:09:26 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 
79 typedef struct {
80     unsigned int val;
81     const char *name;
82 } BITNAMES;
83 
84 static void
85 lookup_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 
102 NCURSES_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     if (buf != 0) {
169 
170 	if (tty->c_iflag & ALLIN)
171 	    lookup_bits(buf, iflags, "iflags", tty->c_iflag);
172 
173 	if (tty->c_oflag & ALLOUT)
174 	    lookup_bits(buf, oflags, "oflags", tty->c_oflag);
175 
176 	if (tty->c_cflag & ALLCTRL)
177 	    lookup_bits(buf, cflags, "cflags", tty->c_cflag);
178 
179 #if defined(CS5) && defined(CS8)
180 	{
181 	    static struct {
182 		int value;
183 		const char *name;
184 	    } csizes[] = {
185 #define CS_DATA(name) { name, #name " " }
186 		CS_DATA(CS5),
187 #ifdef CS6
188 		    CS_DATA(CS6),
189 #endif
190 #ifdef CS7
191 		    CS_DATA(CS7),
192 #endif
193 		    CS_DATA(CS8),
194 	    };
195 	    const char *result = "CSIZE? ";
196 	    int value = (tty->c_cflag & CSIZE);
197 	    unsigned n;
198 
199 	    if (value != 0) {
200 		for (n = 0; n < SIZEOF(csizes); n++) {
201 		    if (csizes[n].value == value) {
202 			result = csizes[n].name;
203 			break;
204 		    }
205 		}
206 	    }
207 	    strcat(buf, result);
208 	}
209 #endif
210 
211 	if (tty->c_lflag & ALLLOCAL)
212 	    lookup_bits(buf, lflags, "lflags", tty->c_lflag);
213     }
214 #else
215     /* reference: ttcompat(4M) on SunOS 4.1 */
216 #ifndef EVENP
217 #define EVENP 0
218 #endif
219 #ifndef LCASE
220 #define LCASE 0
221 #endif
222 #ifndef LLITOUT
223 #define LLITOUT 0
224 #endif
225 #ifndef ODDP
226 #define ODDP 0
227 #endif
228 #ifndef TANDEM
229 #define TANDEM 0
230 #endif
231 
232     static const BITNAMES cflags[] =
233     {
234 	{CBREAK, "CBREAK"},
235 	{CRMOD, "CRMOD"},
236 	{ECHO, "ECHO"},
237 	{EVENP, "EVENP"},
238 	{LCASE, "LCASE"},
239 	{LLITOUT, "LLITOUT"},
240 	{ODDP, "ODDP"},
241 	{RAW, "RAW"},
242 	{TANDEM, "TANDEM"},
243 	{XTABS, "XTABS"},
244 	{0, NULL}
245 #define ALLCTRL	(CBREAK|CRMOD|ECHO|EVENP|LCASE|LLITOUT|ODDP|RAW|TANDEM|XTABS)
246     };
247 
248     buf = _nc_trace_buf(0,
249 			8 + sizeof(cflags));
250     if (buf != 0) {
251 	if (tty->sg_flags & ALLCTRL) {
252 	    lookup_bits(buf, cflags, "cflags", tty->sg_flags);
253 	}
254     }
255 #endif
256     return (buf);
257 }
258 
259 NCURSES_EXPORT(char *)
260 _nc_tracebits(void)
261 {
262     return _nc_trace_ttymode(&(cur_term->Nttyb));
263 }
264 #else
265 EMPTY_MODULE(_nc_tracebits)
266 #endif /* TRACE */
267