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[bytom/vapor.git] / vendor / github.com / syndtr / goleveldb / leveldb / comparer / comparer.go

diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/comparer/comparer.go b/vendor/github.com/syndtr/goleveldb/leveldb/comparer/comparer.go
deleted file mode 100644 (file)
index 14a28f1..0000000
--- a/vendor/github.com/syndtr/goleveldb/leveldb/comparer/comparer.go
+++ /dev/null
@@ -1,57 +0,0 @@
-// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
-// All rights reserved.
-//
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Package comparer provides interface and implementation for ordering
-// sets of data.
-package comparer
-
-// BasicComparer is the interface that wraps the basic Compare method.
-type BasicComparer interface {
-       // Compare returns -1, 0, or +1 depending on whether a is 'less than',
-       // 'equal to' or 'greater than' b. The two arguments can only be 'equal'
-       // if their contents are exactly equal. Furthermore, the empty slice
-       // must be 'less than' any non-empty slice.
-       Compare(a, b []byte) int
-}
-
-// Comparer defines a total ordering over the space of []byte keys: a 'less
-// than' relationship.
-type Comparer interface {
-       BasicComparer
-
-       // Name returns name of the comparer.
-       //
-       // The Level-DB on-disk format stores the comparer name, and opening a
-       // database with a different comparer from the one it was created with
-       // will result in an error.
-       //
-       // An implementation to a new name whenever the comparer implementation
-       // changes in a way that will cause the relative ordering of any two keys
-       // to change.
-       //
-       // Names starting with "leveldb." are reserved and should not be used
-       // by any users of this package.
-       Name() string
-
-       // Bellow are advanced functions used used to reduce the space requirements
-       // for internal data structures such as index blocks.
-
-       // Separator appends a sequence of bytes x to dst such that a <= x && x < b,
-       // where 'less than' is consistent with Compare. An implementation should
-       // return nil if x equal to a.
-       //
-       // Either contents of a or b should not by any means modified. Doing so
-       // may cause corruption on the internal state.
-       Separator(dst, a, b []byte) []byte
-
-       // Successor appends a sequence of bytes x to dst such that x >= b, where
-       // 'less than' is consistent with Compare. An implementation should return
-       // nil if x equal to b.
-       //
-       // Contents of b should not by any means modified. Doing so may cause
-       // corruption on the internal state.
-       Successor(dst, b []byte) []byte
-}