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package storage
import (
"fmt"
"syscall"
)
// errorString is our own simple error type
type errorString string
// Error implements error
func (e errorString) Error() string {
return string(e)
}
// Extend appends extra information to an errorString
func (e errorString) Extend(s string, a ...interface{}) errorString {
return errorString(string(e) + ": " + fmt.Sprintf(s, a...))
}
var (
// ErrNotFound is the error returned when a key cannot be found in storage
ErrNotFound = errorString("store/storage: key not found")
// ErrAlreadyExist is the error returned when a key already exists in storage
ErrAlreadyExists = errorString("store/storage: key already exists")
// ErrInvalidkey is the error returned when an invalid key is passed to storage
ErrInvalidKey = errorString("store/storage: invalid key")
// errPathIsFile is returned when a path for a disk config is actually a file
errPathIsFile = errorString("store/storage: path is file")
// errNoHashesWritten is returned when no blocks are written for given input value
errNoHashesWritten = errorString("storage/storage: no hashes written")
// errInvalidNode is returned when read on an invalid node in the store is attempted
errInvalidNode = errorString("store/storage: invalid node")
// errCorruptNodes is returned when nodes with missing blocks are found during a BlockStorage clean
errCorruptNodes = errorString("store/storage: corrupted nodes")
)
// errSwapNoop performs no error swaps
func errSwapNoop(err error) error {
return err
}
// ErrSwapNotFound swaps syscall.ENOENT for ErrNotFound
func errSwapNotFound(err error) error {
if err == syscall.ENOENT {
return ErrNotFound
}
return err
}
// errSwapExist swaps syscall.EEXIST for ErrAlreadyExists
func errSwapExist(err error) error {
if err == syscall.EEXIST {
return ErrAlreadyExists
}
return err
}
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