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Diffstat (limited to 'nuttx/lib/termios/lib_cfgetspeed.c')
-rw-r--r-- | nuttx/lib/termios/lib_cfgetspeed.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/nuttx/lib/termios/lib_cfgetspeed.c b/nuttx/lib/termios/lib_cfgetspeed.c new file mode 100644 index 000000000..d7f0dc473 --- /dev/null +++ b/nuttx/lib/termios/lib_cfgetspeed.c @@ -0,0 +1,93 @@ +/**************************************************************************** + * lib/termios/lib_cfgetspeed.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <termios.h> +#include <assert.h> + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: cfgetspeed + * + * Descripton: + * The cfgetspeed() function is a non-POSIX function will extract the baud + * from the termios structure to which the termiosp argument points. + * + * This function will return exactly the value in the termios data + * structure, without interpretation. + * + * NOTE 1: NuttX does not control input/output baud independently. Both + * must be the same. The POSIX standard interfaces, cfisetispeed() and + * cfisetospeed() are defined to be cfgetspeed() in termios.h. + * NOTE 2. In Nuttx, the speed_t is defined to be uint32_t and the baud + * encodings of termios.h are the actual baud values themselves. Therefore, + * any baud value may be returned here... not just those enumerated in + * termios.h + * + * Input Parameters: + * termiosp - The termiosp argument is a pointer to a termios structure. + * + * Returned Value: + * Encoded baud value from the termios structure. + * + ****************************************************************************/ + +speed_t cfgetspeed(FAR const struct termios *termiosp) +{ + DEBUGASSERT(termiosp); + return termiosp->c_speed; +} |