image

type Extent struct {
	// Offset from start of the image in bytes.
	Start int64 `json:"start"`
	// Length of this extent in bytes.
	Length int64 `json:"length"`
	// Set if this extent is allocated.
	Allocated bool `json:"allocated"`
	// Set if this extent is read as zeros.
	Zero bool `json:"zero"`
	// Set if this extent is compressed.
	Compressed bool `json:"compressed"`
}

type Image interface {
	io.ReaderAt
	io.Closer
	Extent(start, length int64) (Extent, error)
	Type() Type
	Size() int64 // -1 if unknown
	Readable() error
}

type ImageInfo struct {
	Type  Type  `json:"type"`
	Size  int64 `json:"size"`
	Image `json:"image"`
}

type OpenWithType func(io.ReaderAt, Type) (Image, error)

type Snapshot struct {
	// ID is the unique ID of the snapshot.
	ID string `json:"id"`
	// Name is the human-readable name of the snapshot.
	Name string `json:"name"`
	// CreatedAt is the time at which the snapshot was taken.
	// Nil if unknown.
	CreatedAt *time.Time `json:"created_at,omitempty"`
}

type SnapshotReader interface {
	// Snapshots returns the internal snapshots stored in the image.
	Snapshots() ([]Snapshot, error)
}

type Type string