mirror of https://github.com/perkeep/perkeep.git
89 lines
1.7 KiB
Go
89 lines
1.7 KiB
Go
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/*
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Copyright 2011 Google Inc.
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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 test
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import (
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"camli/blobref"
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"os"
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"sync"
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)
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type Fetcher struct {
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l sync.Mutex
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m map[string]*Blob
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}
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func (tf *Fetcher) AddBlob(b *Blob) {
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tf.l.Lock()
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defer tf.l.Unlock()
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if tf.m == nil {
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tf.m = make(map[string]*Blob)
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}
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tf.m[b.BlobRef().String()] = b
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}
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func (tf *Fetcher) Fetch(ref *blobref.BlobRef) (file blobref.ReadSeekCloser, size int64, err os.Error) {
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tf.l.Lock()
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defer tf.l.Unlock()
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if tf.m == nil {
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err = os.ENOENT
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return
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}
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tb, ok := tf.m[ref.String()]
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if !ok {
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err = os.ENOENT
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return
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}
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file = &strReader{tb.Contents, 0}
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size = int64(len(tb.Contents))
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return
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}
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type strReader struct {
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s string
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pos int
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}
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func (sr *strReader) Close() os.Error { return nil }
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func (sr *strReader) Seek(offset int64, whence int) (ret int64, err os.Error) {
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// Note: ignoring 64-bit offsets. test data should be tiny.
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switch whence {
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case 0:
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sr.pos = int(offset)
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case 1:
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sr.pos += int(offset)
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case 2:
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sr.pos = len(sr.s) + int(offset)
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}
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ret = int64(sr.pos)
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return
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}
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func (sr *strReader) Read(p []byte) (n int, err os.Error) {
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if sr.pos >= len(sr.s) {
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err = os.EOF
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return
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}
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n = copy(p, sr.s[sr.pos:])
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if n == 0 {
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err = os.EOF
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}
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sr.pos += n
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return
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}
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