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types.go
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/
types.go
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package gofile
type CommonMethods interface {
Seek(offset int64, whence int) (ret int64, err error)
Size() (length int64, err error)
Position() (pos int64)
}
// Readable objects should support reading operations
type Readable interface {
CommonMethods
ReadAt(b []byte, offset int64) (nRead int64, err error)
Read(b []byte) (nRead int64, err error)
}
// Writable objects should support writing operations
type Writable interface {
CommonMethods
Write(b []byte) (nWritten int64, err error)
WriteAt(b []byte, offset int64) (nWritten int64, err error)
Append(data []byte) (pos int64, err error)
}
type Editable interface {
Readable
Writable
}
type Freeable interface {
Trunc() (err error)
}
type Pipeable interface {
Transactional
Writable
}
// Transactional objects support methods that create any transactions
type Transactional interface {
TRead(m func(txn Readable) (err error)) (err error)
TWrite(m func(txn Writable) (err error)) (err error)
TReadWrite(m func(txn Editable) (err error)) (err error)
PipeTo(dest Pipeable, chunkSize int64) (err error)
}
type File interface {
Editable
Freeable
Transactional
Close()
}