/*
 libc_replacements.c - replaces libc functions with functions
 from Espressif SDK

 Copyright (c) 2015 <NAME>. All rights reserved.
 This file is part of the esp8266 core for Arduino environment.

 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.

 This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 Modified 03 April 2015 by <NAME>

 */

#include <stddef.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <limits.h>
#include <errno.h>
#include <string.h>
#include <../include/time.h> // See issue #6714
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <sys/reent.h>

#include "ets_sys.h"
#include "os_type.h"
#include "osapi.h"
#include "mem.h"
#include "user_interface.h"
#include "debug.h"

extern "C" {

int IRAM_ATTR _open_r (struct _reent* unused, const char *ptr, int mode) {
    (void)unused;
    (void)ptr;
    (void)mode;
    return 0;
}

int IRAM_ATTR _close_r(struct _reent* unused, int file) {
    (void)unused;
    (void)file;
    return 0;
}

int IRAM_ATTR _fstat_r(struct _reent* unused, int file, struct stat *st) {
    (void)unused;
    (void)file;
    st->st_mode = S_IFCHR;
    return 0;
}

int IRAM_ATTR _lseek_r(struct _reent* unused, int file, int ptr, int dir) {
    (void)unused;
    (void)file;
    (void)ptr;
    (void)dir;
    return 0;
}

int IRAM_ATTR _read_r(struct _reent* unused, int file, char *ptr, int len) {
    (void)unused;
    (void)file;
    (void)ptr;
    (void)len;
    return 0;
}

int IRAM_ATTR _write_r(struct _reent* r, int file, char *ptr, int len) {
    (void) r;
    int pos = len;
    if (file == STDOUT_FILENO) {
        while(pos--) {
            ets_putc(*ptr);
            ++ptr;
        }
    }
    return len;
}

int IRAM_ATTR _putc_r(struct _reent* r, int c, FILE* file) __attribute__((weak));

int IRAM_ATTR _putc_r(struct _reent* r, int c, FILE* file) {
    (void) r;
    if (file->_file == STDOUT_FILENO) {
      ets_putc(c);
      return c;
    }
    return EOF;
}

int IRAM_ATTR puts(const char * str) {
    char c;
    while((c = *str) != 0) {
        ets_putc(c);
        ++str;
    }
    ets_putc('\n');
    return true;
}

#undef putchar
int IRAM_ATTR putchar(int c) {
    ets_putc(c);
    return c;
}

void _exit(int status) {
    (void) status;
    abort();
}

int atexit(void (*func)()) __attribute__((weak));
int atexit(void (*func)()) {
    (void) func;
    return 0;
}

};
