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/**
* \file
*
* \brief System-specific implementation of the \ref _write function used by
* the standard library.
*
* Copyright (c) 2009-2015 Atmel Corporation. All rights reserved.
*
* \asf_license_start
*
* \page License
*
* 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. The name of Atmel may not be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 4. This software may only be redistributed and used in connection with an
* Atmel microcontroller product.
*
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
*
* \asf_license_stop
*
*/
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
*/
#include "compiler.h"
/**
* \addtogroup group_common_utils_stdio
*
* \{
*/
volatile void *volatile stdio_base;
int (*ptr_put)(void volatile*, char);
#if ( defined(__ICCARM__))
#include <yfuns.h>
_STD_BEGIN
#pragma module_name = "?__write"
/*! \brief Writes a number of bytes, at most \a size, from the memory area
* pointed to by \a buffer.
*
* If \a buffer is zero then \ref __write performs flushing of internal buffers,
* if any. In this case, \a handle can be \c -1 to indicate that all handles
* should be flushed.
*
* \param handle File handle to write to.
* \param buffer Pointer to buffer to read bytes to write from.
* \param size Number of bytes to write.
*
* \return The number of bytes written, or \c _LLIO_ERROR on failure.
*/
size_t __write(int handle, const unsigned char *buffer, size_t size)
{
size_t nChars = 0;
if (buffer == 0) {
// This means that we should flush internal buffers.
return 0;
}
// This implementation only writes to stdout and stderr.
// For all other file handles, it returns failure.
if (handle != _LLIO_STDOUT && handle != _LLIO_STDERR) {
return _LLIO_ERROR;
}
for (; size != 0; --size) {
if (ptr_put(stdio_base, *buffer++) < 0) {
return _LLIO_ERROR;
}
++nChars;
}
return nChars;
}
_STD_END
#elif (defined(__GNUC__))
int __attribute__((weak))
_write (int file, char * ptr, int len);
int __attribute__((weak))
_write (int file, char * ptr, int len)
{
int nChars = 0;
if ((file != 1) && (file != 2) && (file!=3)) {
return -1;
}
for (; len != 0; --len) {
if (ptr_put(stdio_base, *ptr++) < 0) {
return -1;
}
++nChars;
}
return nChars;
}
#endif
/**
* \}
*/
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