use io;

// BFS inode: structure that stores metadata about
// resources in the filesystem
export type inode = struct {
	// Root block of the file content
	@offset(0) block: u64,

	// Length of file
	@offset(8) length: u64,

	// Timestamp of last modification
	@offset(16) last_modified: u64,

	// Owning user name
	@offset(24) owner: [17]u8,

	// Owning group name
	@offset(41) group: [17]u8,

	// Number of references of the inode
	@offset(58) references: u16,

	// Permission flags
	@offset(60) permissions: u8,

	// Attribute flags
	@offset(61) attributes: u8,

	// Levels of mapping for file content
	@offset(62) map_levels: u8,

	// Reserved
	@offset(63) reserved0: u8
};

// Get an inode from the filesystem given inode ID
export fn getinode(filesystem: *bfs, inid: u64, in: *inode) (void | io::error) = {
	const inaddr = (inid << 6): io::off;

	pread(filesystem.device, in: *[size(inode)]u8, inaddr)?;
};

// Sets an inode in the filesystem given inode ID
export fn setinode(filesystem: *bfs, inid: u64, in: *inode) (void | io::error) = {
	const inaddr = (inid << 6): io::off;

	pwrite(filesystem.device, in: *[size(inode)]u8, inaddr)?;
};