/*
 * Copyright (c) 2006-2020, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2020-05-31     RT-Thread    first version
 */

#include <stdio.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdarg.h>

#undef errno
extern int errno;
extern int _end;
extern void print_char(char);
caddr_t _sbrk(int incr)
{
    static unsigned char *heap = NULL;
    unsigned char *prev_heap;

    if (heap == NULL)
    {
        heap = (unsigned char *) &_end;
    }
    prev_heap = heap;

    heap += incr;

    return (caddr_t) prev_heap;
}

int link(char *old, char *new)
{
    return -1;
}

int _close(int file)
{
    return -1;
}

int _fstat(int file, struct stat *st)
{
    st->st_mode = S_IFCHR;
    return 0;
}

int _isatty(int file)
{
    return 1;
}

int _lseek(int file, int ptr, int dir)
{
    return 0;
}

int _read(int file, char *ptr, int len)
{
    return 0;
}

void abort(void)
{
    /* Abort called */
    while (1)
        ;
}

int _write(int fd, char *pBuffer, int size)
{
    for (int i = 0; i < size; i++)
    {
        if (pBuffer[i] == '\n')
        {
            print_char('\r');
        }
        print_char(pBuffer[i]);
    }
    return size;
}