1 /****************************************************************************
2 * Copyright (c) 1998-2007,2008 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 /*
36 * lib_baudrate.c
37 *
38 */
39
40 #include <curses.priv.h>
41 #include <term.h> /* cur_term, pad_char */
42 #include <termcap.h> /* ospeed */
43 #if defined(__FreeBSD__)
44 #include <sys/param.h>
45 #endif
46
47 /*
48 * These systems use similar header files, which define B1200 as 1200, etc.,
49 * but can be overridden by defining USE_OLD_TTY so B1200 is 9, which makes all
50 * of the indices up to B115200 fit nicely in a 'short', allowing us to retain
51 * ospeed's type for compatibility.
52 */
53 #if (defined(__FreeBSD__) && (__FreeBSD_version < 700000)) || defined(__NetBSD__) || defined(__OpenBSD__)
54 #undef B0
55 #undef B50
56 #undef B75
57 #undef B110
58 #undef B134
59 #undef B150
60 #undef B200
61 #undef B300
62 #undef B600
63 #undef B1200
64 #undef B1800
65 #undef B2400
66 #undef B4800
67 #undef B9600
68 #undef B19200
69 #undef EXTA
70 #undef B38400
71 #undef EXTB
72 #undef B57600
73 #undef B115200
74 #undef B230400
75 #undef B460800
76 #undef B921600
77 #define USE_OLD_TTY
78 #include <sys/ttydev.h>
79 #else
80 #undef USE_OLD_TTY
81 #endif /* USE_OLD_TTY */
82
83 MODULE_ID("$Id: lib_baudrate.c,v 1.27 2008/06/28 15:19:24 tom Exp $")
84
85 /*
86 * int
87 * baudrate()
88 *
89 * Returns the current terminal's baud rate.
90 *
91 */
92
93 struct speed {
94 int s; /* value for 'ospeed' is an index */
95 int sp; /* the actual speed */
96 };
97
98 static struct speed const speeds[] =
99 {
100 {B0, 0},
101 {B50, 50},
102 {B75, 75},
103 {B110, 110},
104 {B134, 134},
105 {B150, 150},
106 {B200, 200},
107 {B300, 300},
108 {B600, 600},
109 {B1200, 1200},
110 {B1800, 1800},
111 {B2400, 2400},
112 {B4800, 4800},
113 {B9600, 9600},
114 #ifdef B19200
115 {B19200, 19200},
116 #else
117 #ifdef EXTA
118 {EXTA, 19200},
119 #endif
120 #endif
121 #ifdef B38400
122 {B38400, 38400},
123 #else
124 #ifdef EXTB
125 {EXTB, 38400},
126 #endif
127 #endif
128 #ifdef B57600
129 {B57600, 57600},
130 #endif
131 #ifdef B115200
132 {B115200, 115200},
133 #endif
134 #ifdef B230400
135 {B230400, 230400},
136 #endif
137 #ifdef B460800
138 {B460800, 460800},
139 #endif
140 #ifdef B921600
141 {B921600, 921600},
142 #endif
143 };
144
145 NCURSES_EXPORT(int)
_nc_baudrate(int OSpeed)146 _nc_baudrate(int OSpeed)
147 {
148 #if !USE_REENTRANT
149 static int last_OSpeed;
150 static int last_baudrate;
151 #endif
152
153 int result = ERR;
154 unsigned i;
155
156 #if !USE_REENTRANT
157 if (OSpeed == last_OSpeed) {
158 result = last_baudrate;
159 }
160 #endif
161 if (result == ERR) {
162 if (OSpeed >= 0) {
163 for (i = 0; i < SIZEOF(speeds); i++) {
164 if (speeds[i].s == OSpeed) {
165 result = speeds[i].sp;
166 break;
167 }
168 }
169 }
170 #if !USE_REENTRANT
171 if (OSpeed == last_OSpeed) {
172 last_OSpeed = OSpeed;
173 last_baudrate = result;
174 }
175 #endif
176 }
177 return (result);
178 }
179
180 NCURSES_EXPORT(int)
_nc_ospeed(int BaudRate)181 _nc_ospeed(int BaudRate)
182 {
183 int result = 1;
184 unsigned i;
185
186 if (BaudRate >= 0) {
187 for (i = 0; i < SIZEOF(speeds); i++) {
188 if (speeds[i].sp == BaudRate) {
189 result = speeds[i].s;
190 break;
191 }
192 }
193 }
194 return (result);
195 }
196
197 NCURSES_EXPORT(int)
baudrate(void)198 baudrate(void)
199 {
200 int result;
201
202 T((T_CALLED("baudrate()")));
203
204 /*
205 * In debugging, allow the environment symbol to override when we're
206 * redirecting to a file, so we can construct repeatable test-cases
207 * that take into account costs that depend on baudrate.
208 */
209 #ifdef TRACE
210 if (!isatty(fileno(SP ? SP->_ofp : stdout))
211 && getenv("BAUDRATE") != 0) {
212 int ret;
213 if ((ret = _nc_getenv_num("BAUDRATE")) <= 0)
214 ret = 9600;
215 ospeed = _nc_ospeed(ret);
216 returnCode(ret);
217 }
218 #endif
219
220 if (cur_term != 0) {
221 #ifdef USE_OLD_TTY
222 result = cfgetospeed(&cur_term->Nttyb);
223 ospeed = _nc_ospeed(result);
224 #else /* !USE_OLD_TTY */
225 #ifdef TERMIOS
226 ospeed = cfgetospeed(&cur_term->Nttyb);
227 #else
228 ospeed = cur_term->Nttyb.sg_ospeed;
229 #endif
230 result = _nc_baudrate(ospeed);
231 #endif
232 cur_term->_baudrate = result;
233 } else {
234 result = ERR;
235 }
236
237 returnCode(result);
238 }
239