sfs_header.h

#ifndef min
	#define min( a, b ) ( ((a) < (b)) ? (a) : (b) )
#endif

#ifndef SFS_API_HEADER
#define SFS_API_HEADER



#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>



#define NB_BLOCK 4096
#define MAX_DISK NB_BLOCK
#define FAT_SIZE NB_BLOCK

#define NB_FILES 512
#define MAX_FILE NB_FILES

#define EMPTY    -69

typedef struct FileAccessStatus {

    int opened;
    int wr_ptr;
    int rd_ptr;

} FileAccessStatus;

typedef struct FileDescriptor {

    char                filename[32];
    int                 fat_index;
    time_t              timestamp;
    int                 size;
	FileAccessStatus    fas;

} FileDescriptor;

typedef struct DirectoryDescriptor {

    FileDescriptor table[MAX_FILE];
    int count;

} DirectoryDescriptor;

typedef struct fat_node {

    size_t db_index;
    int next;
    int free;

} fat_node;

typedef struct FileAllocationTable {

    fat_node table[MAX_DISK];
    int count;

} FileAllocationTable;

typedef struct freeblocklist {

    int list[MAX_DISK];

} freeblocklist;

typedef union DiskBlock {
    DirectoryDescriptor dd;
    FileAllocationTable fat;
    freeblocklist fbl;
} DiskBlock;

void mksfs(int fresh);
void sfs_ls();
int sfs_open(char * name);
int sfs_close(int fileID);
int sfs_write(int fileID, char * buf, int length);
int sfs_read(int fileID, char * buf, int length);

#endif