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28f540f4 | 1 | /* `struct termios' speed frobnication functions. SunOS 4 version. |
478b92f0 UD |
2 | Copyright (C) 1991, 1992, 1993, 1996, 1997 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. | |
28f540f4 | 4 | |
478b92f0 UD |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
28f540f4 | 9 | |
478b92f0 UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Library General Public License for more details. | |
28f540f4 | 14 | |
478b92f0 UD |
15 | You should have received a copy of the GNU Library General Public |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
28f540f4 | 19 | |
28f540f4 RM |
20 | #include <stddef.h> |
21 | #include <errno.h> | |
22 | #include <termios.h> | |
23 | ||
c4029823 | 24 | static const speed_t speeds[] = |
28f540f4 RM |
25 | { |
26 | 0, | |
27 | 50, | |
28 | 75, | |
29 | 110, | |
30 | 134, | |
31 | 150, | |
32 | 200, | |
33 | 300, | |
34 | 600, | |
35 | 1200, | |
36 | 1800, | |
37 | 2400, | |
38 | 4800, | |
39 | 9600, | |
40 | 19200, | |
41 | 38400, | |
42 | }; | |
43 | ||
44 | ||
45 | /* Return the output baud rate stored in *TERMIOS_P. */ | |
46 | speed_t | |
c4029823 UD |
47 | cfgetospeed (termios_p) |
48 | const struct termios *termios_p; | |
28f540f4 RM |
49 | { |
50 | return termios_p->c_cflag & CBAUD; | |
51 | } | |
52 | ||
53 | /* Return the input baud rate stored in *TERMIOS_P. */ | |
54 | speed_t | |
c4029823 UD |
55 | cfgetispeed (termios_p) |
56 | const struct termios *termios_p; | |
28f540f4 RM |
57 | { |
58 | return (termios_p->c_cflag & CIBAUD) >> IBSHIFT; | |
59 | } | |
60 | ||
61 | /* Set the output baud rate stored in *TERMIOS_P to SPEED. */ | |
62 | int | |
c4029823 UD |
63 | cfsetospeed (termios_p, speed) |
64 | struct termios *termios_p; | |
65 | speed_t speed; | |
28f540f4 RM |
66 | { |
67 | register unsigned int i; | |
68 | ||
69 | if (termios_p == NULL) | |
70 | { | |
c4029823 | 71 | __set_errno (EINVAL); |
28f540f4 RM |
72 | return -1; |
73 | } | |
74 | ||
75 | /* This allows either B1200 or 1200 to work. XXX | |
76 | Do we really want to try to support this, given that | |
77 | fetching the speed must return one or the other? */ | |
78 | ||
79 | for (i = 0; i < sizeof (speeds) / sizeof (speeds[0]); ++i) | |
80 | if (i == speed || speeds[i] == speed) | |
81 | { | |
82 | termios_p->c_cflag &= ~CBAUD; | |
83 | termios_p->c_cflag |= i; | |
84 | return 0; | |
85 | } | |
86 | ||
c4029823 | 87 | __set_errno (EINVAL); |
28f540f4 RM |
88 | return -1; |
89 | } | |
90 | ||
91 | /* Set the input baud rate stored in *TERMIOS_P to SPEED. */ | |
92 | int | |
c4029823 UD |
93 | cfsetispeed (termios_p, speed) |
94 | struct termios *termios_p; | |
95 | speed_t speed; | |
28f540f4 RM |
96 | { |
97 | register unsigned int i; | |
98 | ||
99 | if (termios_p == NULL) | |
100 | { | |
c4029823 | 101 | __set_errno (EINVAL); |
28f540f4 RM |
102 | return -1; |
103 | } | |
104 | ||
105 | /* See comment in cfsetospeed (above). */ | |
106 | for (i = 0; i < sizeof (speeds) / sizeof (speeds[0]); ++i) | |
107 | if (i == speed || speeds[i] == speed) | |
108 | { | |
109 | termios_p->c_cflag &= ~CIBAUD; | |
110 | termios_p->c_cflag |= i << IBSHIFT; | |
111 | return 0; | |
112 | } | |
113 | ||
c4029823 | 114 | __set_errno (EINVAL); |
28f540f4 RM |
115 | return -1; |
116 | } |