speed.c

来自「一个C源代码分析器」· C语言 代码 · 共 68 行

/* `struct termios' speed frobnication functions.  4.4 BSD/generic GNU version.
Copyright (C) 1991, 1992, 1993 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 <ansidecl.h>
#include <stddef.h>
#include <errno.h>
#include <termios.h>

/* Return the output baud rate stored in *TERMIOS_P.  */
speed_t
DEFUN(cfgetospeed, (termios_p), CONST struct termios *termios_p)
{
  return termios_p->__ospeed;
}

/* Return the input baud rate stored in *TERMIOS_P.  */
speed_t
DEFUN(cfgetispeed, (termios_p), CONST struct termios *termios_p)
{
  return termios_p->__ispeed;
}

/* Set the output baud rate stored in *TERMIOS_P to SPEED.  */
int
DEFUN(cfsetospeed, (termios_p, speed),
      struct termios *termios_p AND speed_t speed)
{
  if (termios_p == NULL)
    {
      errno = EINVAL;
      return -1;
    }

  termios_p->__ospeed = speed;
  return 0;
}

/* Set the input baud rate stored in *TERMIOS_P to SPEED.  */
int
DEFUN(cfsetispeed, (termios_p, speed),
      struct termios *termios_p AND speed_t speed)
{
  if (termios_p == NULL)
    {
      errno = EINVAL;
      return -1;
    }

  termios_p->__ispeed = speed;
  return 0;
}