mirror of https://github.com/k3s-io/k3s
41 lines
996 B
Go
41 lines
996 B
Go
|
/*
|
||
|
|
Copyright The ocicrypt Authors.
|
||
|
|
|
||
|
|
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
|
||
|
|
|
||
|
|
http://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 ocicrypt
|
||
|
|
|
||
|
|
import (
|
||
|
|
"io"
|
||
|
|
)
|
||
|
|
|
||
|
|
type readerAtReader struct {
|
||
|
|
r io.ReaderAt
|
||
|
|
off int64
|
||
|
|
}
|
||
|
|
|
||
|
|
// ReaderFromReaderAt takes an io.ReaderAt and returns an io.Reader
|
||
|
|
func ReaderFromReaderAt(r io.ReaderAt) io.Reader {
|
||
|
|
return &readerAtReader{
|
||
|
|
r: r,
|
||
|
|
off: 0,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (rar *readerAtReader) Read(p []byte) (n int, err error) {
|
||
|
|
n, err = rar.r.ReadAt(p, rar.off)
|
||
|
|
rar.off += int64(n)
|
||
|
|
return n, err
|
||
|
|
}
|