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/* `struct termios' speed frobnication functions. SunOS 4 version.
Copyright (C) 1991, 1992, 1993, 1996 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <stddef.h>
#include <errno.h>
#include <termios.h>
static const speed_t speeds[] =
{
0,
50,
75,
110,
134,
150,
200,
300,
600,
1200,
1800,
2400,
4800,
9600,
19200,
38400,
};
/* 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;
}
/* Return the input baud rate stored in *TERMIOS_P. */
speed_t
cfgetispeed (termios_p)
const struct termios *termios_p;
{
return (termios_p->c_cflag & CIBAUD) >> IBSHIFT;
}
/* Set the output baud rate stored in *TERMIOS_P to SPEED. */
int
cfsetospeed (termios_p, speed)
struct termios *termios_p;
speed_t speed;
{
register unsigned int i;
if (termios_p == NULL)
{
__set_errno (EINVAL);
return -1;
}
/* This allows either B1200 or 1200 to work. XXX
Do we really want to try to support this, given that
fetching the speed must return one or the other? */
for (i = 0; i < sizeof (speeds) / sizeof (speeds[0]); ++i)
if (i == speed || speeds[i] == speed)
{
termios_p->c_cflag &= ~CBAUD;
termios_p->c_cflag |= i;
return 0;
}
__set_errno (EINVAL);
return -1;
}
/* Set the input baud rate stored in *TERMIOS_P to SPEED. */
int
cfsetispeed (termios_p, speed)
struct termios *termios_p;
speed_t speed;
{
register unsigned int i;
if (termios_p == NULL)
{
__set_errno (EINVAL);
return -1;
}
/* See comment in cfsetospeed (above). */
for (i = 0; i < sizeof (speeds) / sizeof (speeds[0]); ++i)
if (i == speed || speeds[i] == speed)
{
termios_p->c_cflag &= ~CIBAUD;
termios_p->c_cflag |= i << IBSHIFT;
return 0;
}
__set_errno (EINVAL);
return -1;
}
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