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51 lines
1.4 KiB
Go
51 lines
1.4 KiB
Go
/*
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Copyright 2014 Workiva, LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package skip
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type widths []uint64
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type nodes []*node
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type node struct {
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// forward denotes the forward pointing pointers in this
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// node.
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forward nodes
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//zero level pre node
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preNode *node
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// widths keeps track of the distance between this pointer
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// and the forward pointers so we can access skip list
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// values by position in logarithmic time.
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widths widths
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// entry is the associated value with this node.
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entry Comparator
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}
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func (n *node) Compare(e Comparator) int {
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return n.entry.Compare(e)
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}
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// newNode will allocate and return a new node with the entry
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// provided. maxLevels will determine the length of the forward
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// pointer list associated with this node.
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func newNode(cmp Comparator, maxLevels uint8) *node {
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return &node{
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entry: cmp,
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forward: make(nodes, maxLevels),
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widths: make(widths, maxLevels),
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}
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}
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