termios/speed.c

   1 /* `struct termios' speed frobnication functions.  4.4 BSD/generic GNU version.
   2    Copyright (C) 1991,1992,1993,1996,1997,2002 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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <stddef.h>
  21 #include <errno.h>
  22 #include <termios.h>
  23
  24 /* Return the output baud rate stored in *TERMIOS_P.  */
  25 speed_t
  26 cfgetospeed (termios_p)
  27      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 cfgetispeed (termios_p)
  35      const struct termios *termios_p;
  36 {
  37   return termios_p->__ispeed;
  38 }
  39
  40 /* Set the output baud rate stored in *TERMIOS_P to SPEED.  */
  41 int
  42 cfsetospeed (termios_p, speed)
  43      struct termios *termios_p;
  44      speed_t speed;
  45 {
  46   if (termios_p == NULL)
  47     {
  48       __set_errno (EINVAL);
  49       return -1;
  50     }
  51
  52   termios_p->__ospeed = speed;
  53   return 0;
  54 }
  55 libc_hidden_def (cfsetospeed)
  56
  57 /* Set the input baud rate stored in *TERMIOS_P to SPEED.  */
  58 int
  59 cfsetispeed (termios_p, speed)
  60      struct termios *termios_p;
  61      speed_t speed;
  62 {
  63   if (termios_p == NULL)
  64     {
  65       __set_errno (EINVAL);
  66       return -1;
  67     }
  68
  69   termios_p->__ispeed = speed;
  70   return 0;
  71 }
  72 libc_hidden_def (cfsetispeed)