#pragma once
#include <stdbool.h>
#include <malloc.h>
typedef struct {
// TODO
// (should also be moved to a user-visible header)
} stat_t;
#define FM_READ (0x01)
#define FM_WRITE (0x02)
#define FM_MMAP (0x04)
#define FM_CREATE (0x10)
#define FM_TRUNC (0x20)
#define FM_APPEND (0x40)
// How to use :
// - when using a filesystem : never call the operations in fs_*_ops_t directly, use
// the functions defined bellow
// - when programming a filesystem : don't worry about allocating the fs_handle_t and fs_t,
// it is done automatically
// Structure defining a handle to an open file
typedef struct {
size_t (*read)(void* f, size_t offset, size_t len, char* buf);
size_t (*write)(void* f, size_t offset, size_t len, const char* buf);
void (*close)(void* f);
} fs_handle_ops_t;
typedef struct fs_handle {
struct fs *fs;
int refs;
fs_handle_ops_t *ops;
void* data;
int mode;
} fs_handle_t;
// Structure defining a filesystem
typedef struct {
bool (*open)(void *fs, const char* file, int mode, fs_handle_t *s);
bool (*delete)(void *fs, const char* file);
bool (*rename)(void *fs, const char* from, const char* to);
bool (*stat)(void *fs, const char* file, stat_t *st);
int (*ioctl)(void *fs, const char* file, int command, void* data);
bool (*add_source)(void* fs, fs_handle_t* source);
void (*shutdown)(void *fs);
} fs_ops_t;
typedef struct fs {
int refs;
fs_ops_t *ops;
void* data;
} fs_t;
// Structure defining a filesystem driver
typedef struct {
bool (*make)(fs_handle_t *source, char* opts, fs_t *d);
bool (*detect)(fs_handle_t *source);
} fs_driver_ops_t;
// Common functions
void register_fs_driver(const char* name, fs_driver_ops_t *ops);
fs_t* make_fs(const char* driver, fs_handle_t *source, char* opts);
bool fs_add_source(fs_t *fs, fs_handle_t *source);
void ref_fs(fs_t *fs);
void unref_fs(fs_t *fs);
bool fs_delete(fs_t *fs, const char* file);
bool fs_rename(fs_t *fs, const char* from, const char* to);
bool fs_stat(fs_t *fs, const char* file, stat_t *st);
int fs_ioctl(fs_t *fs, const char* file, int command, void* data);
fs_handle_t* fs_open(fs_t *fs, const char* file, int mode);
void ref_file(fs_handle_t *file);
void unref_file(fs_handle_t *file);
size_t file_read(fs_handle_t *f, size_t offset, size_t len, char* buf);
size_t file_write(fs_handle_t *f, size_t offset, size_t len, const char* buf);
int file_get_mode(fs_handle_t *f);
/* vim: set ts=4 sw=4 tw=0 noet :*/
