mirror of
https://github.com/Luzifer/gcr-clean.git
synced 2024-12-23 20:01:20 +00:00
40 lines
1.1 KiB
Go
40 lines
1.1 KiB
Go
|
// Copyright 2017 Docker, Inc.
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
//
|
||
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
//
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
package digest
|
||
|
|
|
||
|
|
import "hash"
|
||
|
|
|
||
|
|
// Digester calculates the digest of written data. Writes should go directly
|
||
|
|
// to the return value of Hash, while calling Digest will return the current
|
||
|
|
// value of the digest.
|
||
|
|
type Digester interface {
|
||
|
|
Hash() hash.Hash // provides direct access to underlying hash instance.
|
||
|
|
Digest() Digest
|
||
|
|
}
|
||
|
|
|
||
|
|
// digester provides a simple digester definition that embeds a hasher.
|
||
|
|
type digester struct {
|
||
|
|
alg Algorithm
|
||
|
|
hash hash.Hash
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *digester) Hash() hash.Hash {
|
||
|
|
return d.hash
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *digester) Digest() Digest {
|
||
|
|
return NewDigest(d.alg, d.hash)
|
||
|
|
}
|