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/*******************
*
* Copyright 1998-2003 IAR Systems. All rights reserved.
*
* $Revision: 1.14 $
*
* This is a template implementation of the "__write" function used by
* the standard library. Replace it with a system-specific
* implementation.
*
* The "__write" function should output "size" number of bytes from
* "buffer" in some application-specific way. It should return the
* number of characters written, or _LLIO_ERROR on failure.
*
* If "buffer" is zero then __write should perform flushing of
* internal buffers, if any. In this case "handle" can be -1 to
* indicate that all handles should be flushed.
*
* The template implementation below assumes that the application
* provides the function "MyLowLevelPutchar". It should return the
* character written, or -1 on failure.
*
********************/#include
_STD_BEGIN
#pragma module_name = "?__write"
int MyLowLevelPutchar(int x);
/*
* If the __write implementation uses internal buffering, uncomment
* the following line to ensure that we are called with "buffer" as 0
* (i.e. flush) when the application terminates.
*/size_t __write(int handle, const unsigned char * buffer, size_t size)
{
/* Remove the #if #endif pair to enable the implementation */
#if 0size_t nChars = 0;
if (buffer == 0)
{
/*
* This means that we should flush internal buffers. Since we
* don't we just return. (Remember, "handle" == -1 means that all
* handles should be flushed.)
*/
return 0;
}/* This template only writes to "standard out" and "standard err",
* for all other file handles it returns failure. */
if (handle != _LLIO_STDOUT && handle != _LLIO_STDERR)
{
return _LLIO_ERROR;
}for (/* Empty */; size != 0; --size)
{
if (MyLowLevelPutchar(*buffer++) < 0)
{
return _LLIO_ERROR;
}++nChars;
}return nChars;
#else
/* Always return error code when implementation is disabled. */
return _LLIO_ERROR;#endif
}
_STD_END
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