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restic/repository/blob.go
Alexander Neumann 5cdcc99eba Use array instead of hash for backend.ID
Since backend.ID is always a slice of constant length, use an array
instead of a slice. Mostly, arrays behave as slices, except that an
array cannot be nil, so use `*backend.ID` insteaf of `backend.ID` in
places where the absence of an ID is possible (e.g. for the Subtree of a
Node, which may not present when the node is a file node).

This change allows to directly use backend.ID as the the key for a map,
so that arbitrary data structures (e.g. a Set implemented as a
map[backend.ID]struct{}) can easily be formed.
2015-07-25 18:01:57 +02:00

48 lines
899 B
Go

package repository
import (
"fmt"
"github.com/restic/restic/backend"
)
type Blob struct {
ID *backend.ID `json:"id,omitempty"`
Size uint64 `json:"size,omitempty"`
Storage *backend.ID `json:"sid,omitempty"` // encrypted ID
StorageSize uint64 `json:"ssize,omitempty"` // encrypted Size
}
type Blobs []Blob
func (b Blob) Valid() bool {
if b.ID == nil || b.Storage == nil || b.StorageSize == 0 {
return false
}
return true
}
func (b Blob) String() string {
return fmt.Sprintf("Blob<%s (%d) -> %s (%d)>",
b.ID.Str(), b.Size,
b.Storage.Str(), b.StorageSize)
}
// Compare compares two blobs by comparing the ID and the size. It returns -1,
// 0, or 1.
func (b Blob) Compare(other Blob) int {
if res := b.ID.Compare(*other.ID); res != 0 {
return res
}
if b.Size < other.Size {
return -1
}
if b.Size > other.Size {
return 1
}
return 0
}