54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
// Copyright 2023-2024 The NATS Authors
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package stree
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// Internal node interface.
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type node interface {
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isLeaf() bool
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base() *meta
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setPrefix(pre []byte)
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addChild(c byte, n node)
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findChild(c byte) *node
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deleteChild(c byte)
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isFull() bool
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grow() node
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shrink() node
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matchParts(parts [][]byte) ([][]byte, bool)
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kind() string
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iter(f func(node) bool)
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children() []node
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numChildren() uint16
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path() []byte
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}
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type meta struct {
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prefix []byte
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size uint16
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}
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func (n *meta) isLeaf() bool { return false }
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func (n *meta) base() *meta { return n }
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func (n *meta) setPrefix(pre []byte) {
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n.prefix = append([]byte(nil), pre...)
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}
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func (n *meta) numChildren() uint16 { return n.size }
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func (n *meta) path() []byte { return n.prefix }
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// Will match parts against our prefix.
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func (n *meta) matchParts(parts [][]byte) ([][]byte, bool) {
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return matchParts(parts, n.prefix)
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}
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