#ifdef _WIN32
#ifndef _UNISTD_H
#define _UNISTD_H    1

/* This file intended to serve as a drop-in replacement for 
 *  unistd.h on Windows
 *  Please add functionality as neeeded 
 */

#include <stdlib.h>
#include <io.h>
#include <getopt.h> /* getopt from: http://www.pwilson.net/sample.html. */

#define srandom srand
#define random rand

const int W_OK = 2;
const int R_OK = 4;

#define access _access
#define ftruncate _chsize

#define ssize_t int

#define STDIN_FILENO 0
#define STDOUT_FILENO 1
#define STDERR_FILENO 2

#endif /* unistd.h  */
#endif