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-rw-r--r--ethtrie/trie.go620
1 files changed, 0 insertions, 620 deletions
diff --git a/ethtrie/trie.go b/ethtrie/trie.go
deleted file mode 100644
index 4a6613b9d..000000000
--- a/ethtrie/trie.go
+++ /dev/null
@@ -1,620 +0,0 @@
-package ethtrie
-
-import (
- "bytes"
- "fmt"
- "sync"
-
- "github.com/ethereum/go-ethereum/crypto"
- "github.com/ethereum/go-ethereum/ethutil"
-)
-
-func ParanoiaCheck(t1 *Trie) (bool, *Trie) {
- t2 := New(ethutil.Config.Db, "")
-
- t1.NewIterator().Each(func(key string, v *ethutil.Value) {
- t2.Update(key, v.Str())
- })
-
- a := ethutil.NewValue(t2.Root).Bytes()
- b := ethutil.NewValue(t1.Root).Bytes()
-
- return bytes.Compare(a, b) == 0, t2
-}
-
-func (s *Cache) Len() int {
- return len(s.nodes)
-}
-
-// TODO
-// A StateObject is an object that has a state root
-// This is goig to be the object for the second level caching (the caching of object which have a state such as contracts)
-type StateObject interface {
- State() *Trie
- Sync()
- Undo()
-}
-
-type Node struct {
- Key []byte
- Value *ethutil.Value
- Dirty bool
-}
-
-func NewNode(key []byte, val *ethutil.Value, dirty bool) *Node {
- return &Node{Key: key, Value: val, Dirty: dirty}
-}
-
-func (n *Node) Copy() *Node {
- return NewNode(n.Key, n.Value, n.Dirty)
-}
-
-type Cache struct {
- nodes map[string]*Node
- db ethutil.Database
- IsDirty bool
-}
-
-func NewCache(db ethutil.Database) *Cache {
- return &Cache{db: db, nodes: make(map[string]*Node)}
-}
-
-func (cache *Cache) PutValue(v interface{}, force bool) interface{} {
- value := ethutil.NewValue(v)
-
- enc := value.Encode()
- if len(enc) >= 32 || force {
- sha := crypto.Sha3(enc)
-
- cache.nodes[string(sha)] = NewNode(sha, value, true)
- cache.IsDirty = true
-
- return sha
- }
-
- return v
-}
-
-func (cache *Cache) Put(v interface{}) interface{} {
- return cache.PutValue(v, false)
-}
-
-func (cache *Cache) Get(key []byte) *ethutil.Value {
- // First check if the key is the cache
- if cache.nodes[string(key)] != nil {
- return cache.nodes[string(key)].Value
- }
-
- // Get the key of the database instead and cache it
- data, _ := cache.db.Get(key)
- // Create the cached value
- value := ethutil.NewValueFromBytes(data)
-
- defer func() {
- if r := recover(); r != nil {
- fmt.Println("RECOVER GET", cache, cache.nodes)
- panic("bye")
- }
- }()
- // Create caching node
- cache.nodes[string(key)] = NewNode(key, value, false)
-
- return value
-}
-
-func (cache *Cache) Delete(key []byte) {
- delete(cache.nodes, string(key))
-
- cache.db.Delete(key)
-}
-
-func (cache *Cache) Commit() {
- // Don't try to commit if it isn't dirty
- if !cache.IsDirty {
- return
- }
-
- for key, node := range cache.nodes {
- if node.Dirty {
- cache.db.Put([]byte(key), node.Value.Encode())
- node.Dirty = false
- }
- }
- cache.IsDirty = false
-
- // If the nodes grows beyond the 200 entries we simple empty it
- // FIXME come up with something better
- if len(cache.nodes) > 200 {
- cache.nodes = make(map[string]*Node)
- }
-}
-
-func (cache *Cache) Undo() {
- for key, node := range cache.nodes {
- if node.Dirty {
- delete(cache.nodes, key)
- }
- }
- cache.IsDirty = false
-}
-
-// A (modified) Radix Trie implementation. The Trie implements
-// a caching mechanism and will used cached values if they are
-// present. If a node is not present in the cache it will try to
-// fetch it from the database and store the cached value.
-// Please note that the data isn't persisted unless `Sync` is
-// explicitly called.
-type Trie struct {
- mut sync.RWMutex
- prevRoot interface{}
- Root interface{}
- //db Database
- cache *Cache
-}
-
-func copyRoot(root interface{}) interface{} {
- var prevRootCopy interface{}
- if b, ok := root.([]byte); ok {
- prevRootCopy = ethutil.CopyBytes(b)
- } else {
- prevRootCopy = root
- }
-
- return prevRootCopy
-}
-
-func New(db ethutil.Database, Root interface{}) *Trie {
- // Make absolute sure the root is copied
- r := copyRoot(Root)
- p := copyRoot(Root)
-
- trie := &Trie{cache: NewCache(db), Root: r, prevRoot: p}
- trie.setRoot(Root)
-
- return trie
-}
-
-func (self *Trie) setRoot(root interface{}) {
- switch t := root.(type) {
- case string:
- if t == "" {
- root = crypto.Sha3([]byte(""))
- }
- self.Root = root
- case []byte:
- self.Root = root
- default:
- self.Root = self.cache.PutValue(root, true)
- }
-}
-
-/*
- * Public (query) interface functions
- */
-
-func (t *Trie) Update(key, value string) {
- t.mut.Lock()
- defer t.mut.Unlock()
-
- k := CompactHexDecode(key)
-
- root := t.UpdateState(t.Root, k, value)
- t.setRoot(root)
-}
-
-func (t *Trie) Get(key string) string {
- t.mut.Lock()
- defer t.mut.Unlock()
-
- k := CompactHexDecode(key)
- c := ethutil.NewValue(t.getState(t.Root, k))
-
- return c.Str()
-}
-
-func (t *Trie) Delete(key string) {
- t.mut.Lock()
- defer t.mut.Unlock()
-
- k := CompactHexDecode(key)
-
- root := t.deleteState(t.Root, k)
- t.setRoot(root)
-}
-
-func (self *Trie) GetRoot() []byte {
- switch self.Root.(type) {
- case string:
- return []byte(self.Root.(string))
- case []byte:
- return self.Root.([]byte)
- default:
- panic(fmt.Sprintf("invalid root type %T", self.Root))
- }
-}
-
-// Simple compare function which creates a rlp value out of the evaluated objects
-func (t *Trie) Cmp(trie *Trie) bool {
- return ethutil.NewValue(t.Root).Cmp(ethutil.NewValue(trie.Root))
-}
-
-// Returns a copy of this trie
-func (t *Trie) Copy() *Trie {
- trie := New(t.cache.db, t.Root)
- for key, node := range t.cache.nodes {
- trie.cache.nodes[key] = node.Copy()
- }
-
- return trie
-}
-
-// Save the cached value to the database.
-func (t *Trie) Sync() {
- t.cache.Commit()
- t.prevRoot = copyRoot(t.Root)
-}
-
-func (t *Trie) Undo() {
- t.cache.Undo()
- t.Root = t.prevRoot
-}
-
-func (t *Trie) Cache() *Cache {
- return t.cache
-}
-
-func (t *Trie) getState(node interface{}, key []byte) interface{} {
- n := ethutil.NewValue(node)
- // Return the node if key is empty (= found)
- if len(key) == 0 || n.IsNil() || n.Len() == 0 {
- return node
- }
-
- currentNode := t.getNode(node)
- length := currentNode.Len()
-
- if length == 0 {
- return ""
- } else if length == 2 {
- // Decode the key
- k := CompactDecode(currentNode.Get(0).Str())
- v := currentNode.Get(1).Raw()
-
- if len(key) >= len(k) && bytes.Equal(k, key[:len(k)]) { //CompareIntSlice(k, key[:len(k)]) {
- return t.getState(v, key[len(k):])
- } else {
- return ""
- }
- } else if length == 17 {
- return t.getState(currentNode.Get(int(key[0])).Raw(), key[1:])
- }
-
- // It shouldn't come this far
- panic("unexpected return")
-}
-
-func (t *Trie) getNode(node interface{}) *ethutil.Value {
- n := ethutil.NewValue(node)
-
- if !n.Get(0).IsNil() {
- return n
- }
-
- str := n.Str()
- if len(str) == 0 {
- return n
- } else if len(str) < 32 {
- return ethutil.NewValueFromBytes([]byte(str))
- }
-
- data := t.cache.Get(n.Bytes())
-
- return data
-}
-
-func (t *Trie) UpdateState(node interface{}, key []byte, value string) interface{} {
- return t.InsertState(node, key, value)
-}
-
-func (t *Trie) Put(node interface{}) interface{} {
- return t.cache.Put(node)
-
-}
-
-func EmptyStringSlice(l int) []interface{} {
- slice := make([]interface{}, l)
- for i := 0; i < l; i++ {
- slice[i] = ""
- }
- return slice
-}
-
-func (t *Trie) InsertState(node interface{}, key []byte, value interface{}) interface{} {
- if len(key) == 0 {
- return value
- }
-
- // New node
- n := ethutil.NewValue(node)
- if node == nil || n.Len() == 0 {
- newNode := []interface{}{CompactEncode(key), value}
-
- return t.Put(newNode)
- }
-
- currentNode := t.getNode(node)
- // Check for "special" 2 slice type node
- if currentNode.Len() == 2 {
- // Decode the key
-
- k := CompactDecode(currentNode.Get(0).Str())
- v := currentNode.Get(1).Raw()
-
- // Matching key pair (ie. there's already an object with this key)
- if bytes.Equal(k, key) { //CompareIntSlice(k, key) {
- newNode := []interface{}{CompactEncode(key), value}
- return t.Put(newNode)
- }
-
- var newHash interface{}
- matchingLength := MatchingNibbleLength(key, k)
- if matchingLength == len(k) {
- // Insert the hash, creating a new node
- newHash = t.InsertState(v, key[matchingLength:], value)
- } else {
- // Expand the 2 length slice to a 17 length slice
- oldNode := t.InsertState("", k[matchingLength+1:], v)
- newNode := t.InsertState("", key[matchingLength+1:], value)
- // Create an expanded slice
- scaledSlice := EmptyStringSlice(17)
- // Set the copied and new node
- scaledSlice[k[matchingLength]] = oldNode
- scaledSlice[key[matchingLength]] = newNode
-
- newHash = t.Put(scaledSlice)
- }
-
- if matchingLength == 0 {
- // End of the chain, return
- return newHash
- } else {
- newNode := []interface{}{CompactEncode(key[:matchingLength]), newHash}
- return t.Put(newNode)
- }
- } else {
-
- // Copy the current node over to the new node and replace the first nibble in the key
- newNode := EmptyStringSlice(17)
-
- for i := 0; i < 17; i++ {
- cpy := currentNode.Get(i).Raw()
- if cpy != nil {
- newNode[i] = cpy
- }
- }
-
- newNode[key[0]] = t.InsertState(currentNode.Get(int(key[0])).Raw(), key[1:], value)
-
- return t.Put(newNode)
- }
-
- panic("unexpected end")
-}
-
-func (t *Trie) deleteState(node interface{}, key []byte) interface{} {
- if len(key) == 0 {
- return ""
- }
-
- // New node
- n := ethutil.NewValue(node)
- //if node == nil || (n.Type() == reflect.String && (n.Str() == "" || n.Get(0).IsNil())) || n.Len() == 0 {
- if node == nil || n.Len() == 0 {
- //return nil
- //fmt.Printf("<empty ret> %x %d\n", n, len(n.Bytes()))
-
- return ""
- }
-
- currentNode := t.getNode(node)
- // Check for "special" 2 slice type node
- if currentNode.Len() == 2 {
- // Decode the key
- k := CompactDecode(currentNode.Get(0).Str())
- v := currentNode.Get(1).Raw()
-
- // Matching key pair (ie. there's already an object with this key)
- if bytes.Equal(k, key) { //CompareIntSlice(k, key) {
- //fmt.Printf("<delete ret> %x\n", v)
-
- return ""
- } else if bytes.Equal(key[:len(k)], k) { //CompareIntSlice(key[:len(k)], k) {
- hash := t.deleteState(v, key[len(k):])
- child := t.getNode(hash)
-
- var newNode []interface{}
- if child.Len() == 2 {
- newKey := append(k, CompactDecode(child.Get(0).Str())...)
- newNode = []interface{}{CompactEncode(newKey), child.Get(1).Raw()}
- } else {
- newNode = []interface{}{currentNode.Get(0).Str(), hash}
- }
-
- //fmt.Printf("%x\n", newNode)
-
- return t.Put(newNode)
- } else {
- return node
- }
- } else {
- // Copy the current node over to the new node and replace the first nibble in the key
- n := EmptyStringSlice(17)
- var newNode []interface{}
-
- for i := 0; i < 17; i++ {
- cpy := currentNode.Get(i).Raw()
- if cpy != nil {
- n[i] = cpy
- }
- }
-
- n[key[0]] = t.deleteState(n[key[0]], key[1:])
- amount := -1
- for i := 0; i < 17; i++ {
- if n[i] != "" {
- if amount == -1 {
- amount = i
- } else {
- amount = -2
- }
- }
- }
- if amount == 16 {
- newNode = []interface{}{CompactEncode([]byte{16}), n[amount]}
- } else if amount >= 0 {
- child := t.getNode(n[amount])
- if child.Len() == 17 {
- newNode = []interface{}{CompactEncode([]byte{byte(amount)}), n[amount]}
- } else if child.Len() == 2 {
- key := append([]byte{byte(amount)}, CompactDecode(child.Get(0).Str())...)
- newNode = []interface{}{CompactEncode(key), child.Get(1).Str()}
- }
-
- } else {
- newNode = n
- }
-
- //fmt.Printf("%x\n", newNode)
- return t.Put(newNode)
- }
-
- panic("unexpected return")
-}
-
-type TrieIterator struct {
- trie *Trie
- key string
- value string
-
- shas [][]byte
- values []string
-
- lastNode []byte
-}
-
-func (t *Trie) NewIterator() *TrieIterator {
- return &TrieIterator{trie: t}
-}
-
-func (self *Trie) Iterator() *Iterator {
- return NewIterator(self)
-}
-
-// Some time in the near future this will need refactoring :-)
-// XXX Note to self, IsSlice == inline node. Str == sha3 to node
-func (it *TrieIterator) workNode(currentNode *ethutil.Value) {
- if currentNode.Len() == 2 {
- k := CompactDecode(currentNode.Get(0).Str())
-
- if currentNode.Get(1).Str() == "" {
- it.workNode(currentNode.Get(1))
- } else {
- if k[len(k)-1] == 16 {
- it.values = append(it.values, currentNode.Get(1).Str())
- } else {
- it.shas = append(it.shas, currentNode.Get(1).Bytes())
- it.getNode(currentNode.Get(1).Bytes())
- }
- }
- } else {
- for i := 0; i < currentNode.Len(); i++ {
- if i == 16 && currentNode.Get(i).Len() != 0 {
- it.values = append(it.values, currentNode.Get(i).Str())
- } else {
- if currentNode.Get(i).Str() == "" {
- it.workNode(currentNode.Get(i))
- } else {
- val := currentNode.Get(i).Str()
- if val != "" {
- it.shas = append(it.shas, currentNode.Get(1).Bytes())
- it.getNode([]byte(val))
- }
- }
- }
- }
- }
-}
-
-func (it *TrieIterator) getNode(node []byte) {
- currentNode := it.trie.cache.Get(node)
- it.workNode(currentNode)
-}
-
-func (it *TrieIterator) Collect() [][]byte {
- if it.trie.Root == "" {
- return nil
- }
-
- it.getNode(ethutil.NewValue(it.trie.Root).Bytes())
-
- return it.shas
-}
-
-func (it *TrieIterator) Purge() int {
- shas := it.Collect()
- for _, sha := range shas {
- it.trie.cache.Delete(sha)
- }
- return len(it.values)
-}
-
-func (it *TrieIterator) Key() string {
- return ""
-}
-
-func (it *TrieIterator) Value() string {
- return ""
-}
-
-type EachCallback func(key string, node *ethutil.Value)
-
-func (it *TrieIterator) Each(cb EachCallback) {
- it.fetchNode(nil, ethutil.NewValue(it.trie.Root).Bytes(), cb)
-}
-
-func (it *TrieIterator) fetchNode(key []byte, node []byte, cb EachCallback) {
- it.iterateNode(key, it.trie.cache.Get(node), cb)
-}
-
-func (it *TrieIterator) iterateNode(key []byte, currentNode *ethutil.Value, cb EachCallback) {
- if currentNode.Len() == 2 {
- k := CompactDecode(currentNode.Get(0).Str())
-
- pk := append(key, k...)
- if currentNode.Get(1).Len() != 0 && currentNode.Get(1).Str() == "" {
- it.iterateNode(pk, currentNode.Get(1), cb)
- } else {
- if k[len(k)-1] == 16 {
- cb(DecodeCompact(pk), currentNode.Get(1))
- } else {
- it.fetchNode(pk, currentNode.Get(1).Bytes(), cb)
- }
- }
- } else {
- for i := 0; i < currentNode.Len(); i++ {
- pk := append(key, byte(i))
- if i == 16 && currentNode.Get(i).Len() != 0 {
- cb(DecodeCompact(pk), currentNode.Get(i))
- } else {
- if currentNode.Get(i).Len() != 0 && currentNode.Get(i).Str() == "" {
- it.iterateNode(pk, currentNode.Get(i), cb)
- } else {
- val := currentNode.Get(i).Str()
- if val != "" {
- it.fetchNode(pk, []byte(val), cb)
- }
- }
- }
- }
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-30 22:06:51 +0800