sysdeps/generic/speed.c

   1 /* `struct termios' speed frobnication functions.  4.4 BSD/generic GNU version.
   2 Copyright (C) 1991, 1992, 1993 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 <ansidecl.h>
  21 #include <stddef.h>
  22 #include <errno.h>
  23 #include <termios.h>
  24
  25 /* Return the output baud rate stored in *TERMIOS_P.  */
  26 speed_t
  27 DEFUN(cfgetospeed, (termios_p), CONST struct termios *termios_p)
  28 {
  29   return termios_p->__ospeed;
  30 }
  31
  32 /* Return the input baud rate stored in *TERMIOS_P.  */
  33 speed_t
  34 DEFUN(cfgetispeed, (termios_p), CONST struct termios *termios_p)
  35 {
  36   return termios_p->__ispeed;
  37 }
  38
  39 /* Set the output baud rate stored in *TERMIOS_P to SPEED.  */
  40 int
  41 DEFUN(cfsetospeed, (termios_p, speed),
  42       struct termios *termios_p AND speed_t speed)
  43 {
  44   if (termios_p == NULL)
  45     {
  46       errno = EINVAL;
  47       return -1;
  48     }
  49
  50   termios_p->__ospeed = speed;
  51   return 0;
  52 }
  53
  54 /* Set the input baud rate stored in *TERMIOS_P to SPEED.  */
  55 int
  56 DEFUN(cfsetispeed, (termios_p, speed),
  57       struct termios *termios_p AND speed_t speed)
  58 {
  59   if (termios_p == NULL)
  60     {
  61       errno = EINVAL;
  62       return -1;
  63     }
  64
  65   termios_p->__ispeed = speed;
  66   return 0;
  67 }