forked from cerc-io/plugeth
142 lines
3.4 KiB
Go
142 lines
3.4 KiB
Go
// Copyright 2014 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package light
|
|
|
|
import (
|
|
"errors"
|
|
"sync"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/crypto"
|
|
"github.com/ethereum/go-ethereum/ethdb"
|
|
"github.com/ethereum/go-ethereum/rlp"
|
|
)
|
|
|
|
// NodeSet stores a set of trie nodes. It implements trie.Database and can also
|
|
// act as a cache for another trie.Database.
|
|
type NodeSet struct {
|
|
db map[string][]byte
|
|
dataSize int
|
|
lock sync.RWMutex
|
|
}
|
|
|
|
// NewNodeSet creates an empty node set
|
|
func NewNodeSet() *NodeSet {
|
|
return &NodeSet{
|
|
db: make(map[string][]byte),
|
|
}
|
|
}
|
|
|
|
// Put stores a new node in the set
|
|
func (db *NodeSet) Put(key []byte, value []byte) error {
|
|
db.lock.Lock()
|
|
defer db.lock.Unlock()
|
|
|
|
if _, ok := db.db[string(key)]; !ok {
|
|
db.db[string(key)] = common.CopyBytes(value)
|
|
db.dataSize += len(value)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Get returns a stored node
|
|
func (db *NodeSet) Get(key []byte) ([]byte, error) {
|
|
db.lock.RLock()
|
|
defer db.lock.RUnlock()
|
|
|
|
if entry, ok := db.db[string(key)]; ok {
|
|
return entry, nil
|
|
}
|
|
return nil, errors.New("not found")
|
|
}
|
|
|
|
// Has returns true if the node set contains the given key
|
|
func (db *NodeSet) Has(key []byte) (bool, error) {
|
|
_, err := db.Get(key)
|
|
return err == nil, nil
|
|
}
|
|
|
|
// KeyCount returns the number of nodes in the set
|
|
func (db *NodeSet) KeyCount() int {
|
|
db.lock.RLock()
|
|
defer db.lock.RUnlock()
|
|
|
|
return len(db.db)
|
|
}
|
|
|
|
// DataSize returns the aggregated data size of nodes in the set
|
|
func (db *NodeSet) DataSize() int {
|
|
db.lock.RLock()
|
|
defer db.lock.RUnlock()
|
|
|
|
return db.dataSize
|
|
}
|
|
|
|
// NodeList converts the node set to a NodeList
|
|
func (db *NodeSet) NodeList() NodeList {
|
|
db.lock.RLock()
|
|
defer db.lock.RUnlock()
|
|
|
|
var values NodeList
|
|
for _, value := range db.db {
|
|
values = append(values, value)
|
|
}
|
|
return values
|
|
}
|
|
|
|
// Store writes the contents of the set to the given database
|
|
func (db *NodeSet) Store(target ethdb.Putter) {
|
|
db.lock.RLock()
|
|
defer db.lock.RUnlock()
|
|
|
|
for key, value := range db.db {
|
|
target.Put([]byte(key), value)
|
|
}
|
|
}
|
|
|
|
// NodeList stores an ordered list of trie nodes. It implements ethdb.Putter.
|
|
type NodeList []rlp.RawValue
|
|
|
|
// Store writes the contents of the list to the given database
|
|
func (n NodeList) Store(db ethdb.Putter) {
|
|
for _, node := range n {
|
|
db.Put(crypto.Keccak256(node), node)
|
|
}
|
|
}
|
|
|
|
// NodeSet converts the node list to a NodeSet
|
|
func (n NodeList) NodeSet() *NodeSet {
|
|
db := NewNodeSet()
|
|
n.Store(db)
|
|
return db
|
|
}
|
|
|
|
// Put stores a new node at the end of the list
|
|
func (n *NodeList) Put(key []byte, value []byte) error {
|
|
*n = append(*n, value)
|
|
return nil
|
|
}
|
|
|
|
// DataSize returns the aggregated data size of nodes in the list
|
|
func (n NodeList) DataSize() int {
|
|
var size int
|
|
for _, node := range n {
|
|
size += len(node)
|
|
}
|
|
return size
|
|
}
|