/
gouch_ops.go
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/
gouch_ops.go
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// Copyright (c) 2014 Marty Schoch
// 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 gouchstore
import (
"os"
)
// GouchOps an interface for plugging in differentl implementations
// of some common low-level operations
type GouchOps interface {
OpenFile(name string, flag int, perm os.FileMode) (file *os.File, err error)
ReadAt(f *os.File, b []byte, off int64) (n int, err error)
WriteAt(f *os.File, b []byte, off int64) (n int, err error)
GotoEOF(f *os.File) (ret int64, err error)
Sync(f *os.File) error
CompactionTreeWriter(keyCompare btreeKeyComparator, reduce, rereduce reduceFunc, reduceContext interface{}) (TreeWriter, error)
SnappyEncode(dst, src []byte) []byte
SnappyDecode(dst, src []byte) ([]byte, error)
Close(f *os.File) error
}