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/* `struct termios' speed frobnication functions.  Linux version.

   Copyright (C) 1991, 92, 93, 95, 96, 97, 98, 2000 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, write to the Free

   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

   02111-1307 USA.  */

/* Modified by Jeff Johnston, May 27, 2002 to remove kernel hack

   as we simply ignore a cfisetspeed of 0 instead of treating it specially */

#include <stddef.h>

#include <errno.h>

#include <termios.h>

/* Return the output baud rate stored in *TERMIOS_P.  */

speed_t

cfgetospeed (termios_p)

     const struct termios *termios_p;

{

  return termios_p->c_cflag & (CBAUD | CBAUDEX);

}

/* Return the input baud rate stored in *TERMIOS_P.

   For Linux there is no difference between input and output

   speed. */

speed_t

cfgetispeed (termios_p)

     const struct termios *termios_p;

{

  return termios_p->c_cflag & (CBAUD | CBAUDEX);

}

/* Set the output baud rate stored in *TERMIOS_P to SPEED.  */

int

cfsetospeed  (termios_p, speed)

     struct termios *termios_p;

     speed_t speed;

{

  if ((speed & ~CBAUD) != 0

      && (speed < B57600 || speed > __MAX_BAUD))

    {

      errno = (EINVAL);

      return -1;

    }

  termios_p->c_cflag &= ~(CBAUD | CBAUDEX);

  termios_p->c_cflag |= speed;

  return 0;

}

/* Set the input baud rate stored in *TERMIOS_P to SPEED.

   Although for Linux there is no difference between input and output

   speed, the numerical 0 is a special case for the input baud rate.  It

   should set the input baud rate to the output baud rate so we do

   nothing. */

int

cfsetispeed (termios_p, speed)

     struct termios *termios_p;

     speed_t speed;

{

  if ((speed & ~CBAUD) != 0

      && (speed < B57600 || speed > __MAX_BAUD))

    {

      errno = (EINVAL);

      return -1;

    }

  if (speed != 0)

    {

      termios_p->c_cflag &= ~(CBAUD | CBAUDEX);

      termios_p->c_cflag |= speed;

    }

  return 0;

}