1094 lines
20 KiB
Go
1094 lines
20 KiB
Go
package lsv
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import (
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"github.com/davecgh/go-spew/spew"
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)
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// DNode 节点
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type DNode struct {
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family [3]*DNode
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size int
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key []rune
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value []rune
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}
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// DTree 用于数据的树
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type DTree struct {
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root *DNode
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feature *DNode
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Compare func(s1, s2 []rune) int
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iter *Iterator
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}
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func compareRunes(s1, s2 []rune) int {
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switch {
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case len(s1) > len(s2):
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for i := 0; i < len(s2); i++ {
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if s1[i] != s2[i] {
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if s1[i] > s2[i] {
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return 1
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}
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return -1
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}
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}
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return 1
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case len(s1) < len(s2):
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for i := 0; i < len(s1); i++ {
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if s1[i] != s2[i] {
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if s1[i] > s2[i] {
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return 1
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}
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return -1
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}
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}
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return -1
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default:
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for i := 0; i < len(s1); i++ {
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if s1[i] != s2[i] {
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if s1[i] > s2[i] {
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return 1
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}
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return -1
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}
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}
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return 0
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}
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}
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func (n *DNode) String() string {
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if n == nil {
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return "nil"
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}
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p := "nil"
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if n.family[0] != nil {
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p = spew.Sprint(n.family[0].value)
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}
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return spew.Sprint(n.value) + "(" + p + "|" + spew.Sprint(n.size) + ")"
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}
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// func assertImplementation() {
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// var _ tree.IBSTreeDupKey = (*Tree)(nil)
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// }
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// newDataTree 创建一个树
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func newDataTree(Compare func(s1, s2 []rune) int) *DTree {
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return &DTree{Compare: Compare, iter: NewIteratorWithCap(nil, 16)}
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}
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func (tree *DTree) String() string {
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str := "VBTree-Dup\n"
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if tree.root == nil {
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return str + "nil"
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}
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output(tree.root, "", true, &str)
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return str
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}
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func (tree *DTree) Iterator() *Iterator {
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return initIterator(tree)
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}
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func (tree *DTree) Size() int {
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if tree.root == nil {
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return 0
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}
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return tree.root.size
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}
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// IndexNode 索引节点
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func (tree *DTree) IndexNode(idx int) *DNode {
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cur := tree.root
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if idx >= 0 {
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for cur != nil {
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ls := getSize(cur.family[1])
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if idx == ls {
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return cur
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} else if idx < ls {
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cur = cur.family[1]
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} else {
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idx = idx - ls - 1
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cur = cur.family[2]
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}
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}
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} else {
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idx = -idx - 1
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for cur != nil {
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rs := getSize(cur.family[2])
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if idx == rs {
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return cur
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} else if idx < rs {
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cur = cur.family[2]
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} else {
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idx = idx - rs - 1
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cur = cur.family[1]
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}
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}
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}
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return nil
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}
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func (tree *DTree) Index(idx int) (interface{}, bool) {
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n := tree.IndexNode(idx)
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if n != nil {
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return n.value, true
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}
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return nil, false
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}
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func (tree *DTree) IndexRange(idx1, idx2 int) (result []interface{}, ok bool) { // 0 -1
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if idx1^idx2 < 0 {
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if idx1 < 0 {
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idx1 = tree.root.size + idx1
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} else {
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idx2 = tree.root.size + idx2
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}
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}
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if idx1 > idx2 {
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ok = true
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if idx1 >= tree.root.size {
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idx1 = tree.root.size - 1
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ok = false
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}
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n := tree.IndexNode(idx1)
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tree.iter.SetNode(n)
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iter := tree.iter
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result = make([]interface{}, 0, idx1-idx2)
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for i := idx2; i <= idx1; i++ {
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if iter.Prev() {
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result = append(result, iter.Value())
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} else {
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ok = false
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return
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}
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}
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return
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} else {
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ok = true
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if idx2 >= tree.root.size {
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idx2 = tree.root.size - 1
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ok = false
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}
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if n := tree.IndexNode(idx1); n != nil {
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tree.iter.SetNode(n)
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iter := tree.iter
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result = make([]interface{}, 0, idx2-idx1)
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for i := idx1; i <= idx2; i++ {
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if iter.Next() {
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result = append(result, iter.Value())
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} else {
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ok = false
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return
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}
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}
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return
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}
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}
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return nil, false
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}
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func (tree *DTree) RemoveIndex(idx int) (interface{}, bool) {
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n := tree.IndexNode(idx)
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if n != nil {
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tree.RemoveNode(n)
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return n.value, true
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}
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return nil, false
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}
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func (tree *DTree) RemoveNode(n *DNode) {
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if tree.root.size == 1 {
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tree.root = nil
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tree.feature = nil
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// return n
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return
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}
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if n == tree.feature {
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iter := NewIterator(n)
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iter.Prev()
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tree.feature = iter.cur
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}
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ls, rs := getChildrenSize(n)
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if ls == 0 && rs == 0 {
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p := n.family[0]
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p.family[getRelationship(n)] = nil
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tree.fixSizeWithRemove(p)
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// return n
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return
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}
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var cur *DNode
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if ls > rs {
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cur = n.family[1]
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for cur.family[2] != nil {
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cur = cur.family[2]
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}
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cleft := cur.family[1]
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cur.family[0].family[getRelationship(cur)] = cleft
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if cleft != nil {
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cleft.family[0] = cur.family[0]
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}
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} else {
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cur = n.family[2]
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for cur.family[1] != nil {
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cur = cur.family[1]
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}
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cright := cur.family[2]
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cur.family[0].family[getRelationship(cur)] = cright
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if cright != nil {
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cright.family[0] = cur.family[0]
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}
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}
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cparent := cur.family[0]
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// 修改为interface 交换
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n.key, n.value, cur.key, cur.value = cur.key, cur.value, n.key, n.value
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// 考虑到刚好替换的节点是 被替换节点的孩子节点的时候, 从自身修复高度
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if cparent == n {
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tree.fixSizeWithRemove(n)
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} else {
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tree.fixSizeWithRemove(cparent)
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}
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// return cur
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return
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}
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func (tree *DTree) Remove(key []rune) (interface{}, bool) {
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if n, ok := tree.GetNode(key); ok {
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tree.RemoveNode(n)
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return n.value, true
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}
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// return nil
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return nil, false
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}
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func (tree *DTree) Clear() {
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tree.root = nil
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tree.iter = NewIteratorWithCap(nil, 16)
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}
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// Values 返回先序遍历的值
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func (tree *DTree) Values() [][]rune {
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mszie := 0
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if tree.root != nil {
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mszie = tree.root.size
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}
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result := make([][]rune, 0, mszie)
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tree.Traversal(func(k, v []rune) bool {
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result = append(result, v)
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return true
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}, LDR)
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return result
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}
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func (tree *DTree) GetRange(k1, k2 []rune) (result []interface{}) {
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c := tree.Compare(k2, k1)
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switch c {
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case 1:
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var min, max *DNode
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resultmin := tree.getArountNode(k1)
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resultmax := tree.getArountNode(k2)
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for i := 1; i < 3 && min == nil; i++ {
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min = resultmin[i]
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}
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for i := 1; i > -1 && max == nil; i-- {
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max = resultmax[i]
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}
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if max == nil {
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return []interface{}{}
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}
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result = make([]interface{}, 0, 16)
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tree.iter.SetNode(min)
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iter := tree.iter
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for iter.Next() {
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result = append(result, iter.Value())
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if iter.cur == max {
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break
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}
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}
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case -1:
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var min, max *DNode
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resultmin := tree.getArountNode(k2)
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resultmax := tree.getArountNode(k1)
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for i := 1; i < 3 && min == nil; i++ {
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min = resultmin[i]
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}
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for i := 1; i > -1 && max == nil; i-- {
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max = resultmax[i]
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}
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if min == nil {
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return []interface{}{}
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}
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result = make([]interface{}, 0, 16)
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tree.iter.SetNode(max)
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iter := tree.iter
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for iter.Prev() {
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result = append(result, iter.Value())
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if iter.cur == min {
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break
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}
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}
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case 0:
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if n, ok := tree.GetNode(k1); ok {
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return []interface{}{n.value}
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}
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return []interface{}{}
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}
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return
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}
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func (tree *DTree) GetString(key string) (interface{}, bool) {
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n, ok := tree.GetNode([]rune(key))
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if ok {
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return n.value, true
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}
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return n, false
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}
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func (tree *DTree) Get(key []rune) ([]rune, bool) {
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n, ok := tree.GetNode(key)
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if ok {
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return n.value, true
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}
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return nil, false
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}
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func (tree *DTree) GetAround(key []rune) (result [3]interface{}) {
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an := tree.getArountNode(key)
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for i, n := range an {
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if n != nil {
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result[i] = n.value
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}
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}
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return
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}
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func (tree *DTree) getArountNode(key []rune) (result [3]*DNode) {
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var last *DNode
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var lastc int
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for n := tree.root; n != nil; {
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last = n
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c := tree.Compare(key, n.key)
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switch c {
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case -1:
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n = n.family[1]
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lastc = c
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case 1:
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n = n.family[2]
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lastc = c
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case 0:
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tree.iter.SetNode(n)
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iter := tree.iter
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iter.Prev()
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for iter.Prev() {
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if tree.Compare(iter.cur.value, n.value) == 0 {
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n = iter.cur
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} else {
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break
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}
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}
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result[1] = n
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n = nil
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default:
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panic("Get Compare only is allowed in -1, 0, 1")
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}
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}
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switch lastc {
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case 1:
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if result[1] != nil {
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result[0] = tree.iter.GetPrev(result[1], 1)
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result[2] = tree.iter.GetNext(result[1], 1)
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} else {
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result[0] = last
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result[2] = tree.iter.GetNext(last, 1)
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}
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case -1:
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if result[1] != nil {
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result[0] = tree.iter.GetPrev(result[1], 1)
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result[2] = tree.iter.GetNext(result[1], 1)
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} else {
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result[2] = last
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result[0] = tree.iter.GetPrev(last, 1)
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}
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case 0:
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if result[1] == nil {
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return
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}
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result[0] = tree.iter.GetPrev(result[1], 1)
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result[2] = tree.iter.GetNext(result[1], 1)
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}
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return
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}
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func (tree *DTree) GetNode(key []rune) (*DNode, bool) {
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for n := tree.root; n != nil; {
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switch c := tree.Compare(key, n.key); c {
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case -1:
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n = n.family[1]
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case 1:
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n = n.family[2]
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case 0:
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tree.iter.SetNode(n)
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iter := tree.iter
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iter.Prev()
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for iter.Prev() {
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if tree.Compare(iter.cur.key, n.key) == 0 {
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n = iter.cur
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} else {
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break
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}
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}
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return n, true
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default:
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panic("Get Compare only is allowed in -1, 0, 1")
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}
|
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}
|
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return nil, false
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}
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|
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// PutString Key Value with Type string
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func (tree *DTree) PutString(key, value string) (isInsert bool) {
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return tree.Put([]rune(key), []rune(value))
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}
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func (tree *DTree) putfeature(node *DNode) {
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for cur := tree.root; cur != nil; cur = cur.family[2] {
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cur.size++
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if cur.family[2] == nil {
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cur.family[2] = node
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node.family[0] = cur
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break
|
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}
|
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}
|
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}
|
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|
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// Put return bool
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func (tree *DTree) Put(key, value []rune) (isInsert bool) {
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|
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if tree.root == nil {
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node := &DNode{key: key, value: value, size: 1}
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tree.root = node
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tree.feature = node
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return true
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}
|
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|
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for cur := tree.root; ; {
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|
|
if cur.size > 8 {
|
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factor := cur.size / 10 // or factor = 1
|
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ls, rs := cur.family[1].size, cur.family[2].size
|
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if rs >= ls*2+factor || ls >= rs*2+factor {
|
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tree.fixSize(cur, ls, rs)
|
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}
|
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}
|
|
|
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c := tree.Compare(key, cur.key)
|
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switch {
|
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case c < 0:
|
|
if cur.family[1] == nil {
|
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node := &DNode{key: key, value: value, size: 1}
|
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cur.family[1] = node
|
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node.family[0] = cur
|
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|
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for temp := cur; temp != nil; temp = temp.family[0] {
|
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temp.size++
|
|
}
|
|
|
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if cur.family[0] != nil && cur.family[0].size == 3 {
|
|
if cur.family[0].family[1] == nil {
|
|
tree.lrrotate3(cur.family[0])
|
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} else {
|
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tree.rrotate3(cur.family[0])
|
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}
|
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}
|
|
|
|
return true
|
|
}
|
|
cur = cur.family[1]
|
|
case c > 0:
|
|
if cur.family[2] == nil {
|
|
node := &DNode{key: key, value: value, size: 1}
|
|
cur.family[2] = node
|
|
node.family[0] = cur
|
|
|
|
for temp := cur; temp != nil; temp = temp.family[0] {
|
|
temp.size++
|
|
}
|
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|
|
if cur.family[0] != nil && cur.family[0].size == 3 {
|
|
if cur.family[0].family[2] == nil {
|
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tree.rlrotate3(cur.family[0])
|
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} else {
|
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tree.lrotate3(cur.family[0])
|
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}
|
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}
|
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|
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if tree.Compare(node.key, tree.feature.key) > 0 {
|
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tree.feature = node
|
|
}
|
|
return true
|
|
}
|
|
cur = cur.family[2]
|
|
default:
|
|
cur.value = value
|
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return false
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
// TraversalMethod 遍历模式
|
|
type TraversalMethod int
|
|
|
|
const (
|
|
// L = left R = right D = Value(dest)
|
|
_ TraversalMethod = iota
|
|
//DLR 先值 然后左递归 右递归 下面同理
|
|
DLR
|
|
//LDR 先从左边有序访问到右边 从小到大
|
|
LDR
|
|
// LRD 同理
|
|
LRD
|
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|
|
// DRL 同理
|
|
DRL
|
|
|
|
// RDL 先从右边有序访问到左边 从大到小
|
|
RDL
|
|
|
|
// RLD 同理
|
|
RLD
|
|
)
|
|
|
|
// Traversal 遍历的方法 默认是LDR 从小到大 Compare 为 l < r
|
|
func (tree *DTree) Traversal(every func(k, v []rune) bool, traversalMethod ...interface{}) {
|
|
if tree.root == nil {
|
|
return
|
|
}
|
|
|
|
method := LDR
|
|
if len(traversalMethod) != 0 {
|
|
method = traversalMethod[0].(TraversalMethod)
|
|
}
|
|
|
|
switch method {
|
|
case DLR:
|
|
var traverasl func(cur *DNode) bool
|
|
traverasl = func(cur *DNode) bool {
|
|
if cur == nil {
|
|
return true
|
|
}
|
|
if !every(cur.key, cur.value) {
|
|
return false
|
|
}
|
|
if !traverasl(cur.family[1]) {
|
|
return false
|
|
}
|
|
if !traverasl(cur.family[2]) {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
traverasl(tree.root)
|
|
case LDR:
|
|
var traverasl func(cur *DNode) bool
|
|
traverasl = func(cur *DNode) bool {
|
|
if cur == nil {
|
|
return true
|
|
}
|
|
if !traverasl(cur.family[1]) {
|
|
return false
|
|
}
|
|
if !every(cur.key, cur.value) {
|
|
return false
|
|
}
|
|
if !traverasl(cur.family[2]) {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
traverasl(tree.root)
|
|
case LRD:
|
|
var traverasl func(cur *DNode) bool
|
|
traverasl = func(cur *DNode) bool {
|
|
if cur == nil {
|
|
return true
|
|
}
|
|
if !traverasl(cur.family[1]) {
|
|
return false
|
|
}
|
|
if !traverasl(cur.family[2]) {
|
|
return false
|
|
}
|
|
if !every(cur.key, cur.value) {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
traverasl(tree.root)
|
|
case DRL:
|
|
var traverasl func(cur *DNode) bool
|
|
traverasl = func(cur *DNode) bool {
|
|
if cur == nil {
|
|
return true
|
|
}
|
|
if !every(cur.key, cur.value) {
|
|
return false
|
|
}
|
|
if !traverasl(cur.family[1]) {
|
|
return false
|
|
}
|
|
if !traverasl(cur.family[2]) {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
traverasl(tree.root)
|
|
case RDL:
|
|
var traverasl func(cur *DNode) bool
|
|
traverasl = func(cur *DNode) bool {
|
|
if cur == nil {
|
|
return true
|
|
}
|
|
if !traverasl(cur.family[2]) {
|
|
return false
|
|
}
|
|
if !every(cur.key, cur.value) {
|
|
return false
|
|
}
|
|
if !traverasl(cur.family[1]) {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
traverasl(tree.root)
|
|
case RLD:
|
|
var traverasl func(cur *DNode) bool
|
|
traverasl = func(cur *DNode) bool {
|
|
if cur == nil {
|
|
return true
|
|
}
|
|
if !traverasl(cur.family[2]) {
|
|
return false
|
|
}
|
|
if !traverasl(cur.family[1]) {
|
|
return false
|
|
}
|
|
if !every(cur.key, cur.value) {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
traverasl(tree.root)
|
|
}
|
|
}
|
|
|
|
func (tree *DTree) lrrotate3(cur *DNode) {
|
|
const l = 2
|
|
const r = 1
|
|
|
|
movparent := cur.family[l]
|
|
mov := movparent.family[r]
|
|
|
|
mov.key, mov.value, cur.key, cur.value = cur.key, cur.value, mov.key, mov.value //交换值达到, 相对位移
|
|
|
|
cur.family[r] = mov
|
|
mov.family[0] = cur
|
|
|
|
cur.family[l] = movparent
|
|
movparent.family[r] = nil
|
|
|
|
cur.family[r] = mov
|
|
mov.family[0] = cur
|
|
|
|
// cur.size = 3
|
|
// cur.family[r].size = 1
|
|
cur.family[l].size = 1
|
|
}
|
|
|
|
func (tree *DTree) lrrotate(cur *DNode) {
|
|
|
|
const l = 2
|
|
const r = 1
|
|
|
|
movparent := cur.family[l]
|
|
mov := movparent.family[r]
|
|
|
|
mov.key, mov.value, cur.key, cur.value = cur.key, cur.value, mov.key, mov.value //交换值达到, 相对位移
|
|
|
|
if mov.family[l] != nil {
|
|
movparent.family[r] = mov.family[l]
|
|
movparent.family[r].family[0] = movparent
|
|
//movparent.family[r].child = l
|
|
} else {
|
|
movparent.family[r] = nil
|
|
}
|
|
|
|
if mov.family[r] != nil {
|
|
mov.family[l] = mov.family[r]
|
|
//mov.family[l].child = l
|
|
} else {
|
|
mov.family[l] = nil
|
|
}
|
|
|
|
if cur.family[r] != nil {
|
|
mov.family[r] = cur.family[r]
|
|
mov.family[r].family[0] = mov
|
|
} else {
|
|
mov.family[r] = nil
|
|
}
|
|
|
|
cur.family[r] = mov
|
|
mov.family[0] = cur
|
|
|
|
movparent.size = getChildrenSumSize(movparent) + 1
|
|
mov.size = getChildrenSumSize(mov) + 1
|
|
cur.size = getChildrenSumSize(cur) + 1
|
|
}
|
|
|
|
func (tree *DTree) rlrotate3(cur *DNode) {
|
|
const l = 1
|
|
const r = 2
|
|
|
|
movparent := cur.family[l]
|
|
mov := movparent.family[r]
|
|
|
|
mov.key, mov.value, cur.key, cur.value = cur.key, cur.value, mov.key, mov.value //交换值达到, 相对位移
|
|
|
|
cur.family[r] = mov
|
|
mov.family[0] = cur
|
|
|
|
cur.family[l] = movparent
|
|
movparent.family[r] = nil
|
|
|
|
cur.family[r] = mov
|
|
mov.family[0] = cur
|
|
|
|
// cur.size = 3
|
|
// cur.family[r].size = 1
|
|
cur.family[l].size = 1
|
|
}
|
|
|
|
func (tree *DTree) rlrotate(cur *DNode) {
|
|
|
|
const l = 1
|
|
const r = 2
|
|
|
|
movparent := cur.family[l]
|
|
mov := movparent.family[r]
|
|
|
|
mov.key, mov.value, cur.key, cur.value = cur.key, cur.value, mov.key, mov.value //交换值达到, 相对位移
|
|
|
|
if mov.family[l] != nil {
|
|
movparent.family[r] = mov.family[l]
|
|
movparent.family[r].family[0] = movparent
|
|
} else {
|
|
movparent.family[r] = nil
|
|
}
|
|
|
|
if mov.family[r] != nil {
|
|
mov.family[l] = mov.family[r]
|
|
} else {
|
|
mov.family[l] = nil
|
|
}
|
|
|
|
if cur.family[r] != nil {
|
|
mov.family[r] = cur.family[r]
|
|
mov.family[r].family[0] = mov
|
|
} else {
|
|
mov.family[r] = nil
|
|
}
|
|
|
|
cur.family[r] = mov
|
|
mov.family[0] = cur
|
|
|
|
movparent.size = getChildrenSumSize(movparent) + 1
|
|
mov.size = getChildrenSumSize(mov) + 1
|
|
cur.size = getChildrenSumSize(cur) + 1
|
|
}
|
|
|
|
func (tree *DTree) rrotate3(cur *DNode) {
|
|
const l = 1
|
|
const r = 2
|
|
// 1 right 0 left
|
|
mov := cur.family[l]
|
|
|
|
mov.key, mov.value, cur.key, cur.value = cur.key, cur.value, mov.key, mov.value //交换值达到, 相对位移
|
|
|
|
cur.family[r] = mov
|
|
|
|
cur.family[l] = mov.family[l]
|
|
cur.family[l].family[0] = cur
|
|
|
|
mov.family[l] = nil
|
|
|
|
mov.size = 1
|
|
}
|
|
|
|
func (tree *DTree) rrotate(cur *DNode) {
|
|
|
|
const l = 1
|
|
const r = 2
|
|
// 1 right 0 left
|
|
mov := cur.family[l]
|
|
|
|
mov.key, mov.value, cur.key, cur.value = cur.key, cur.value, mov.key, mov.value //交换值达到, 相对位移
|
|
|
|
// mov.family[l]不可能为nil
|
|
mov.family[l].family[0] = cur
|
|
|
|
cur.family[l] = mov.family[l]
|
|
|
|
// 解决mov节点孩子转移的问题
|
|
if mov.family[r] != nil {
|
|
mov.family[l] = mov.family[r]
|
|
} else {
|
|
mov.family[l] = nil
|
|
}
|
|
|
|
if cur.family[r] != nil {
|
|
mov.family[r] = cur.family[r]
|
|
mov.family[r].family[0] = mov
|
|
} else {
|
|
mov.family[r] = nil
|
|
}
|
|
|
|
// 连接转移后的节点 由于mov只是与cur交换值,parent不变
|
|
cur.family[r] = mov
|
|
|
|
mov.size = getChildrenSumSize(mov) + 1
|
|
cur.size = getChildrenSumSize(cur) + 1
|
|
}
|
|
|
|
func (tree *DTree) lrotate3(cur *DNode) {
|
|
const l = 2
|
|
const r = 1
|
|
// 1 right 0 left
|
|
mov := cur.family[l]
|
|
|
|
mov.key, mov.value, cur.key, cur.value = cur.key, cur.value, mov.key, mov.value //交换值达到, 相对位移
|
|
|
|
cur.family[r] = mov
|
|
|
|
cur.family[l] = mov.family[l]
|
|
cur.family[l].family[0] = cur
|
|
|
|
mov.family[l] = nil
|
|
|
|
mov.size = 1
|
|
}
|
|
|
|
func (tree *DTree) lrotate(cur *DNode) {
|
|
|
|
const l = 2
|
|
const r = 1
|
|
// 1 right 0 left
|
|
mov := cur.family[l]
|
|
|
|
mov.key, mov.value, cur.key, cur.value = cur.key, cur.value, mov.key, mov.value //交换值达到, 相对位移
|
|
|
|
// mov.family[l]不可能为nil
|
|
mov.family[l].family[0] = cur
|
|
|
|
cur.family[l] = mov.family[l]
|
|
|
|
// 解决mov节点孩子转移的问题
|
|
if mov.family[r] != nil {
|
|
mov.family[l] = mov.family[r]
|
|
} else {
|
|
mov.family[l] = nil
|
|
}
|
|
|
|
if cur.family[r] != nil {
|
|
mov.family[r] = cur.family[r]
|
|
mov.family[r].family[0] = mov
|
|
} else {
|
|
mov.family[r] = nil
|
|
}
|
|
|
|
// 连接转移后的节点 由于mov只是与cur交换值,parent不变
|
|
cur.family[r] = mov
|
|
|
|
mov.size = getChildrenSumSize(mov) + 1
|
|
cur.size = getChildrenSumSize(cur) + 1
|
|
}
|
|
|
|
func getChildrenSumSize(cur *DNode) int {
|
|
return getSize(cur.family[1]) + getSize(cur.family[2])
|
|
}
|
|
|
|
func getChildrenSize(cur *DNode) (int, int) {
|
|
return getSize(cur.family[1]), getSize(cur.family[2])
|
|
}
|
|
|
|
func getSize(cur *DNode) int {
|
|
if cur == nil {
|
|
return 0
|
|
}
|
|
return cur.size
|
|
}
|
|
|
|
func (tree *DTree) fixSizeWithRemove(cur *DNode) {
|
|
for cur != nil {
|
|
cur.size--
|
|
if cur.size > 8 {
|
|
factor := cur.size / 10 // or factor = 1
|
|
ls, rs := getChildrenSize(cur)
|
|
if rs >= ls*2+factor || ls >= rs*2+factor {
|
|
tree.fixSize(cur, ls, rs)
|
|
}
|
|
} else if cur.size == 3 {
|
|
if cur.family[1] == nil {
|
|
if cur.family[2].family[1] == nil {
|
|
tree.lrotate3(cur)
|
|
} else {
|
|
tree.lrrotate3(cur)
|
|
}
|
|
} else if cur.family[2] == nil {
|
|
if cur.family[1].family[2] == nil {
|
|
tree.rrotate3(cur)
|
|
} else {
|
|
tree.rlrotate3(cur)
|
|
}
|
|
}
|
|
}
|
|
cur = cur.family[0]
|
|
}
|
|
}
|
|
|
|
func (tree *DTree) fixSize(cur *DNode, ls, rs int) {
|
|
if ls > rs {
|
|
llsize, lrsize := getChildrenSize(cur.family[1])
|
|
if lrsize > llsize {
|
|
tree.rlrotate(cur)
|
|
} else {
|
|
tree.rrotate(cur)
|
|
}
|
|
} else {
|
|
rlsize, rrsize := getChildrenSize(cur.family[2])
|
|
if rlsize > rrsize {
|
|
tree.lrrotate(cur)
|
|
} else {
|
|
tree.lrotate(cur)
|
|
}
|
|
}
|
|
}
|
|
|
|
func output(node *DNode, prefix string, isTail bool, str *string) {
|
|
|
|
if node.family[2] != nil {
|
|
newPrefix := prefix
|
|
if isTail {
|
|
newPrefix += "│ "
|
|
} else {
|
|
newPrefix += " "
|
|
}
|
|
output(node.family[2], newPrefix, false, str)
|
|
}
|
|
*str += prefix
|
|
if isTail {
|
|
*str += "└── "
|
|
} else {
|
|
*str += "┌── "
|
|
}
|
|
|
|
*str += spew.Sprint(node.key) + ":" + spew.Sprint(node.value) + "\n"
|
|
|
|
if node.family[1] != nil {
|
|
newPrefix := prefix
|
|
if isTail {
|
|
newPrefix += " "
|
|
} else {
|
|
newPrefix += "│ "
|
|
}
|
|
output(node.family[1], newPrefix, true, str)
|
|
}
|
|
|
|
}
|
|
|
|
func outputfordebug(node *DNode, prefix string, isTail bool, str *string) {
|
|
|
|
if node.family[2] != nil {
|
|
newPrefix := prefix
|
|
if isTail {
|
|
newPrefix += "│ "
|
|
} else {
|
|
newPrefix += " "
|
|
}
|
|
outputfordebug(node.family[2], newPrefix, false, str)
|
|
}
|
|
*str += prefix
|
|
if isTail {
|
|
*str += "└── "
|
|
} else {
|
|
*str += "┌── "
|
|
}
|
|
|
|
suffix := "("
|
|
parentv := ""
|
|
if node.family[0] == nil {
|
|
parentv = "nil"
|
|
} else {
|
|
parentv = spew.Sprint(node.family[0].key)
|
|
}
|
|
suffix += parentv + "|" + spew.Sprint(node.size) + ")"
|
|
*str += spew.Sprint(node.key) + suffix + "\n"
|
|
|
|
if node.family[1] != nil {
|
|
newPrefix := prefix
|
|
if isTail {
|
|
newPrefix += " "
|
|
} else {
|
|
newPrefix += "│ "
|
|
}
|
|
outputfordebug(node.family[1], newPrefix, true, str)
|
|
}
|
|
}
|
|
|
|
func (tree *DTree) debugString() string {
|
|
str := "VBTree-Dup\n"
|
|
if tree.root == nil {
|
|
return str + "nil"
|
|
}
|
|
outputfordebug(tree.root, "", true, &str)
|
|
return str
|
|
}
|