#ifndef __FILES_H
#define __FILES_H

#include <fs.h>

struct fs_stats_t
{
  int serial;
  char label[SUPERBLOCK_LABEL_SIZE];
  inode_t root_inode;
  unsigned int free_space;
};

struct fs_stats_t fs_info();

int mount(unsigned int volume);
int umount();

/* return RETURN_FAILURE in of failure (pre-existing file, full
   volume...) */
int create_file(const char *pathname, enum file_type_e type);

/* return RETURN_FAILURE in of failure (non pre-existing file, non
   empty directory...) */
int delete_file(const char *pathname);

int open_file(struct file_desc_t *fd, const char *pathname);
void close_file(struct file_desc_t *fd);
void flush_file(struct file_desc_t *fd);
void seek_file(struct file_desc_t *fd, int offset);

/* return the conversion to an int of the current char in the file.
   Return READ_EOF if the file is at end-of-file. */
int readc_file(struct file_desc_t *fd);

/* write a char in the file.
   Fail if there is no place on device. */
int writec_file(struct file_desc_t *fd, char c);

/* read nbytes char from the file and copy them in the buffer.
   Return the number of actually read char; READ_EOF if the file is at
   end-of-file. */
int read_file(struct file_desc_t *fd, void *buf, unsigned int nbyte);

/* write nbyte char from the buffer on the file.
   Return the number of char writen, RETURN_FAILURE in case of error. */
int write_file(struct file_desc_t *fd, const void *buf, unsigned int nbyte);


#endif /* __FILES_H */