projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| d2f5be2a UD |
1 | /* `struct termios' speed frobnication functions. Linux version. |
| 2 | Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc. | |
| 3 | This file is part of the GNU C Library. | |
| 4 | ||
| 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. | |
| 9 | ||
| 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. | |
| 14 | ||
| 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 | |
| 17 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, | |
| 18 | Cambridge, MA 02139, USA. */ | |
| 19 | ||
| 20 | #include <stddef.h> | |
| 21 | #include <errno.h> | |
| 22 | #include <termios.h> | |
| 23 | ||
| 24 | static const speed_t speeds[] = | |
| 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 | 38400, /* Mention this twice here is a trick. */ | |
| 43 | 57600, | |
| 44 | 115200, | |
| 45 | 230400, | |
| 46 | }; | |
| 47 | ||
| 48 | ||
| 49 | /* Return the output baud rate stored in *TERMIOS_P. */ | |
| 50 | speed_t | |
| 51 | cfgetospeed (termios_p) | |
| 52 | const struct termios *termios_p; | |
| 53 | { | |
| 54 | speed_t retval = termios_p->c_cflag & (CBAUD | CBAUDEX); | |
| 55 | ||
| 56 | if (retval & CBAUDEX) | |
| 57 | { | |
| 58 | retval &= ~CBAUDEX; | |
| 59 | retval |= CBAUD + 1; | |
| 60 | } | |
| 61 | ||
| 62 | return retval; | |
| 63 | } | |
| 64 | ||
| 65 | /* Return the input baud rate stored in *TERMIOS_P. | |
| 66 | For Linux there is no difference between input and output speed. */ | |
| 67 | strong_alias (cfgetospeed, cfgetispeed); | |
| 68 | ||
| 69 | /* Set the output baud rate stored in *TERMIOS_P to SPEED. */ | |
| 70 | int | |
| 71 | cfsetospeed (termios_p, speed) | |
| 72 | struct termios *termios_p; | |
| 73 | speed_t speed; | |
| 74 | { | |
| 75 | register unsigned int i; | |
| 76 | ||
| 77 | if (termios_p == NULL) | |
| 78 | { | |
| 79 | errno = EINVAL; | |
| 80 | return -1; | |
| 81 | } | |
| 82 | ||
| 83 | /* This allows either B1200 or 1200 to work. XXX | |
| 84 | Do we really want to try to support this, given that | |
| 85 | fetching the speed must return one or the other? */ | |
| 86 | ||
| 87 | for (i = 0; i < sizeof (speeds) / sizeof (speeds[0]); ++i) | |
| 88 | if (i == speed || speeds[i] == speed) | |
| 89 | { | |
| 90 | termios_p->c_cflag &= ~(CBAUD | CBAUDEX); | |
| 91 | termios_p->c_cflag |= (i & CBAUD); | |
| 92 | if (i & ~CBAUD) | |
| 93 | termios_p->c_cflag |= CBAUDEX; | |
| 94 | return 0; | |
| 95 | } | |
| 96 | ||
| 97 | errno = EINVAL; | |
| 98 | return -1; | |
| 99 | } | |
| 100 | ||
| 101 | /* Set the input baud rate stored in *TERMIOS_P to SPEED. | |
| 102 | For Linux there is no difference between input and output speed. */ | |
| 103 | strong_alias (cfsetospeed, cfsetispeed); |