#ifndef __IHE_CORE_H
#define __IHE_CORE_H

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>

/*
BASIC FILE OPERATIONS ON FILE
*/

#define FD_RO O_RDONLY
#define FD_WO O_WRONLY
#define FD_RW O_RDWR
#define FD_MNONE 0

#define FD_SEEK_CUR  SEEK_CUR
#define FD_SEEK_SET  SEEK_SET
#define FD_SEEK_END  SEEK_END

/*OPEN FILE BY FILE NAME*/
int fd_open( const char *filename, int flags );
/*CLOSE FILE BY FD*/
int fd_close( int fd );
/*SEEK FILE
FD - file descriptor
OFFSET - seek pos
WHENCE - seek mode
NEW_OFFSET - new pos, helps to detect if actualy moved to new pos
*/
int fd_seek( int fd, off_t offset, int whence );
off_t fd_pos( int fd );
off_t fd_set_pos( int fd, off_t offset );
off_t fd_size( int fd );
/*
READ from file
FD - file descriptor
BUF - where to write readed output
COUNT - how much to read
RETURN - size readed
*/
ssize_t fd_read( int fd, void *buf, size_t count );
ssize_t fd_write( int fd, void *buf, size_t count );

/*
FILE RELATED UTILITIES
*/

/*
CHECK IF YOU HAVE PERMISSIONS TO OPEN FILE
MAYBE THIS IS FILE OF USER OR LOWER PERMISSION USER
*/

/*
CHECK IF PATCH TO FILE EXCISTS
*/

/*
GET PATH FILE TYPE
COULD BE SOME DIRECTORY OR SOME LOOP FILE?
*/

/*
GET DEFAULT PATHES THAT WILL IS NOT SUPPORTED
/dev/radnom is not good to open
/dev/ttyUSB also steaming files
/dev/input/mice also is not good alt to open
/proc/<pid>/mmap also is not alterntice to open
search and check for more
*/


/*
FILE OPERATION MANAGMENT STRUCTURE
*/

#define DEFAULT_BLK_SIZE 256

typedef struct file_t
{
	const char *filename;
	int fd; /* fd is fd */
	int flags; /* file opening flags */
	int mode; /* file opening mode */
	off_t offset; /* last used offset */
	long position; /* file cursor position */
	off_t size; /* file size*/
	unsigned int blk_size; /*default block size to operate with*/
} file_t;

file_t *file_init();
int     file_open_fn( file_t *ft, const char *filename, int mode );
int     file_open( file_t *ft, const char *filename, int flags, int mode );
int     file_read_blk( file_t *ft, uint8_t *buf );
int     file_read( file_t *ft, uint8_t *buf, size_t count );
int     file_write_blk( file_t *ft, uint8_t *buf );
int     file_write( file_t *ft, uint8_t *buf, size_t count );
int     file_seek( file_t *ft, off_t offset );
int     file_pos( file_t *ft );
int     file_size( file_t *ft );
int     file_s_mode( file_t *ft, int mode );
int     file_close( file_t *ft );

#endif