44167aa47a
* upgrade k8s package version Signed-off-by: hongzhouzi <hongzhouzi@kubesphere.io> * Script upgrade and code formatting. Signed-off-by: hongzhouzi <hongzhouzi@kubesphere.io> Signed-off-by: hongzhouzi <hongzhouzi@kubesphere.io>
69 lines
1.4 KiB
Go
69 lines
1.4 KiB
Go
/*
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Copyright The ORAS Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package content
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import (
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"io"
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"github.com/containerd/containerd/content"
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)
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// ensure interface
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var (
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_ content.ReaderAt = sizeReaderAt{}
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)
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type readAtCloser interface {
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io.ReaderAt
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io.Closer
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}
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type sizeReaderAt struct {
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readAtCloser
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size int64
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}
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func (ra sizeReaderAt) Size() int64 {
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return ra.size
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}
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func NopCloserAt(r io.ReaderAt) nopCloserAt {
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return nopCloserAt{r}
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}
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type nopCloserAt struct {
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io.ReaderAt
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}
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func (n nopCloserAt) Close() error {
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return nil
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}
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// readerAtWrapper wraps a ReaderAt to give a Reader
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type ReaderAtWrapper struct {
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offset int64
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readerAt io.ReaderAt
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}
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func (r *ReaderAtWrapper) Read(p []byte) (n int, err error) {
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n, err = r.readerAt.ReadAt(p, r.offset)
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r.offset += int64(n)
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return
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}
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func NewReaderAtWrapper(readerAt io.ReaderAt) *ReaderAtWrapper {
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return &ReaderAtWrapper{readerAt: readerAt}
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}
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