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pull/9/head
Jae Kwon 11 years ago
parent
commit
f4d156a4b5
2 changed files with 57 additions and 33 deletions
  1. +55
    -33
      merkle/iavl.go
  2. +2
    -0
      merkle/types.go

+ 55
- 33
merkle/iavl.go View File

@ -1,3 +1,9 @@
/*
This tree is not concurrency safe.
If you want to use it from multiple goroutines, you need to wrap all calls to *IAVLTree
with a mutex.
*/
package merkle package merkle
import ( import (
@ -29,65 +35,81 @@ func NewIAVLTreeFromHash(db Db, hash ByteSlice) *IAVLTree {
return &IAVLTree{db:db, root:root} return &IAVLTree{db:db, root:root}
} }
func (self *IAVLTree) Root() Node {
return self.root
func (t *IAVLTree) Root() Node {
return t.root
} }
func (self *IAVLTree) Size() uint64 {
if self.root == nil { return 0 }
return self.root.Size()
func (t *IAVLTree) Size() uint64 {
if t.root == nil { return 0 }
return t.root.Size()
} }
func (self *IAVLTree) Height() uint8 {
if self.root == nil { return 0 }
return self.root.Height()
func (t *IAVLTree) Height() uint8 {
if t.root == nil { return 0 }
return t.root.Height()
} }
func (self *IAVLTree) Has(key Key) bool {
if self.root == nil { return false }
return self.root.has(self.db, key)
func (t *IAVLTree) Has(key Key) bool {
if t.root == nil { return false }
return t.root.has(t.db, key)
} }
func (self *IAVLTree) Put(key Key, value Value) (updated bool) {
if self.root == nil {
self.root = NewIAVLNode(key, value)
func (t *IAVLTree) Put(key Key, value Value) (updated bool) {
if t.root == nil {
t.root = NewIAVLNode(key, value)
return false return false
} }
self.root, updated = self.root.put(self.db, key, value)
t.root, updated = t.root.put(t.db, key, value)
return updated return updated
} }
func (self *IAVLTree) Hash() (ByteSlice, uint64) {
if self.root == nil { return nil, 0 }
return self.root.Hash()
func (t *IAVLTree) Hash() (ByteSlice, uint64) {
if t.root == nil { return nil, 0 }
return t.root.Hash()
} }
func (self *IAVLTree) Save() {
if self.root == nil { return }
if self.root.hash == nil {
self.root.Hash()
func (t *IAVLTree) Save() {
if t.root == nil { return }
if t.root.hash == nil {
t.root.Hash()
} }
self.root.Save(self.db)
t.root.Save(t.db)
} }
func (self *IAVLTree) Get(key Key) (value Value) {
if self.root == nil { return nil }
return self.root.get(self.db, key)
func (t *IAVLTree) Get(key Key) (value Value) {
if t.root == nil { return nil }
return t.root.get(t.db, key)
} }
func (self *IAVLTree) Remove(key Key) (value Value, err error) {
if self.root == nil { return nil, NotFound(key) }
newRoot, _, value, err := self.root.remove(self.db, key)
func (t *IAVLTree) Remove(key Key) (value Value, err error) {
if t.root == nil { return nil, NotFound(key) }
newRoot, _, value, err := t.root.remove(t.db, key)
if err != nil { if err != nil {
return nil, err return nil, err
} }
self.root = newRoot
t.root = newRoot
return value, nil return value, nil
} }
func (self *IAVLTree) Traverse(cb func(Node) bool) {
if self.root == nil { return }
self.root.traverse(self.db, cb)
func (t *IAVLTree) Copy() Tree {
return &IAVLTree{db:t.db, root:t.root}
}
func (t *IAVLTree) Traverse(cb func(Node) bool) {
if t.root == nil { return }
t.root.traverse(t.db, cb)
}
func (t *IAVLTree) Values() <-chan Value {
root := t.root
ch := make(chan Value)
go func() {
root.traverse(func(n Node) {
if n.Height() == 0 { ch <- n.Value() }
})
close(ch)
}
return ch
} }


+ 2
- 0
merkle/types.go View File

@ -40,7 +40,9 @@ type Tree interface {
Save() Save()
Put(Key, Value) bool Put(Key, Value) bool
Remove(Key) (Value, error) Remove(Key) (Value, error)
Copy() Tree
Traverse(func(Node)bool) Traverse(func(Node)bool)
Values() <-chan Value
} }
func NotFound(key Key) error { func NotFound(key Key) error {


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