39 lines
907 B
Go
39 lines
907 B
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package kvmetainfo
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import (
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"fmt"
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"storj.io/storj/pkg/storj"
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)
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// TODO: known issue:
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// this is incorrect since there's no good way to get such a path
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// since the exact previous key is
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// append(previousPrefix(cursor), infinite(0xFF)...)
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func keyBefore(cursor string) string {
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if cursor == "" {
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return ""
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}
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before := []byte(cursor)
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if before[len(before)-1] == 0 {
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return string(before[:len(before)-1])
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}
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before[len(before)-1]--
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before = append(before, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f)
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return string(before)
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}
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func keyAfter(cursor string) string {
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return cursor + "\x00"
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}
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// getSegmentPath returns the unique path for a particular segment
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func getSegmentPath(encryptedPath storj.Path, segNum int64) storj.Path {
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return storj.JoinPaths(fmt.Sprintf("s%d", segNum), encryptedPath)
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}
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