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41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/* `struct termios' speed frobnication functions. SunOS 4 version.
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Copyright (C) 1991, 1992, 1993, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <stddef.h>
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#include <errno.h>
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#include <termios.h>
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static const speed_t speeds[] =
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{
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0,
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50,
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75,
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110,
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134,
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150,
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200,
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300,
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600,
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1200,
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1800,
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2400,
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4800,
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9600,
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19200,
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38400,
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};
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/* Return the output baud rate stored in *TERMIOS_P. */
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speed_t
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cfgetospeed (termios_p)
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const struct termios *termios_p;
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{
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return termios_p->c_cflag & CBAUD;
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}
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/* Return the input baud rate stored in *TERMIOS_P. */
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speed_t
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cfgetispeed (termios_p)
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const struct termios *termios_p;
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{
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return (termios_p->c_cflag & CIBAUD) >> IBSHIFT;
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}
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/* Set the output baud rate stored in *TERMIOS_P to SPEED. */
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int
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cfsetospeed (termios_p, speed)
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struct termios *termios_p;
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speed_t speed;
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{
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register unsigned int i;
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if (termios_p == NULL)
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{
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__set_errno (EINVAL);
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return -1;
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}
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/* This allows either B1200 or 1200 to work. XXX
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Do we really want to try to support this, given that
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fetching the speed must return one or the other? */
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for (i = 0; i < sizeof (speeds) / sizeof (speeds[0]); ++i)
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if (i == speed || speeds[i] == speed)
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{
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termios_p->c_cflag &= ~CBAUD;
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termios_p->c_cflag |= i;
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return 0;
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}
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__set_errno (EINVAL);
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return -1;
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}
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/* Set the input baud rate stored in *TERMIOS_P to SPEED. */
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int
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cfsetispeed (termios_p, speed)
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struct termios *termios_p;
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speed_t speed;
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{
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register unsigned int i;
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if (termios_p == NULL)
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{
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__set_errno (EINVAL);
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return -1;
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}
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/* See comment in cfsetospeed (above). */
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for (i = 0; i < sizeof (speeds) / sizeof (speeds[0]); ++i)
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if (i == speed || speeds[i] == speed)
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{
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termios_p->c_cflag &= ~CIBAUD;
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termios_p->c_cflag |= i << IBSHIFT;
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return 0;
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}
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__set_errno (EINVAL);
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return -1;
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}
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