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/****************************************************************************
* libc/stdio/lib_printf.c
*
* Copyright (C) 2007-2008, 2011-2012, 2014 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.
*
****************************************************************************/
/****************************************************************************
* Compilation Switches
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <stdio.h>
#include <syslog.h>
#include "lib_internal.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Type Declarations
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Global Function Prototypes
****************************************************************************/
/**************************************************************************
* Global Constant Data
**************************************************************************/
/****************************************************************************
* Global Variables
****************************************************************************/
/**************************************************************************
* Private Constant Data
**************************************************************************/
/****************************************************************************
* Private Variables
**************************************************************************/
/****************************************************************************
* Global Functions
**************************************************************************/
/****************************************************************************
* Name: printf
**************************************************************************/
int printf(FAR const char *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
#if CONFIG_NFILE_STREAMS > 0
ret = vfprintf(stdout, fmt, ap);
#elif CONFIG_NFILE_DESCRIPTORS > 0
ret = vsyslog(LOG_INFO, fmt, ap);
#elif defined(CONFIG_ARCH_LOWPUTC)
ret = lowvsyslog(LOG_INFO, fmt, ap);
#else
# ifdef CONFIG_CPP_HAVE_WARNING
# warning "printf has no data sink"
# endif
ret = 0;
#endif
va_end(ap);
return ret;
}
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