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/******************************************************************************
* Copyright (c) 2004, 2008 IBM Corporation
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
#include <stdint.h>
#include <stddef.h>
#include <unistd.h>
#include "iolib.h"
void uart_send_byte(unsigned char b)
{
asm volatile ("":::"3","4","5","6","7");
io_putchar(b);
}
/**
* Standard write function for the libc.
*
* @param fd file descriptor (should always be 1 or 2)
* @param buf pointer to the array with the output characters
* @param count number of bytes to be written
* @return the number of bytes that have been written successfully
*/
ssize_t write(int fd, const void *buf, size_t count)
{
size_t i;
char *ptr = (char *)buf;
if (fd != 1 && fd != 2)
return 0;
for (i = 0; i < count; i++) {
if (*ptr == '\n')
uart_send_byte('\r');
uart_send_byte(*ptr++);
}
return i;
}
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