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51 lines
1.6 KiB
Go
51 lines
1.6 KiB
Go
// Copyright (c) 2011 CZ.NIC z.s.p.o. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// blame: jnml, labs.nic.cz
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package storage
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import (
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"os"
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)
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// FileAccessor is the concrete type returned by NewFile and OpenFile.
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type FileAccessor struct {
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*os.File
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}
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// Implementation of Accessor.
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func (f *FileAccessor) BeginUpdate() error { return nil }
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// Implementation of Accessor.
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func (f *FileAccessor) EndUpdate() error { return nil }
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// NewFile returns an Accessor backed by an os.File named name, It opens the
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// named file with specified flag (os.O_RDWR etc.) and perm, (0666 etc.) if
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// applicable. If successful, methods on the returned Accessor can be used for
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// I/O. It returns the Accessor and an Error, if any.
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//
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// NOTE: The returned Accessor implements BeginUpdate and EndUpdate as a no op.
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func NewFile(name string, flag int, perm os.FileMode) (store Accessor, err error) {
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var f FileAccessor
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if f.File, err = os.OpenFile(name, flag, perm); err == nil {
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store = &f
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}
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return
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}
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// OpenFile returns an Accessor backed by an existing os.File named name, It
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// opens the named file with specified flag (os.O_RDWR etc.) and perm, (0666
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// etc.) if applicable. If successful, methods on the returned Accessor can be
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// used for I/O. It returns the Accessor and an Error, if any.
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//
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// NOTE: The returned Accessor implements BeginUpdate and EndUpdate as a no op.
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func OpenFile(name string, flag int, perm os.FileMode) (store Accessor, err error) {
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var f FileAccessor
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if f.File, err = os.OpenFile(name, flag, perm); err == nil {
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store = &f
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}
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return
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}
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