mirror of https://github.com/ethereum/go-ethereum
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
67 lines
2.3 KiB
67 lines
2.3 KiB
// Copyright 2023 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 trienode
|
|
|
|
import "github.com/ethereum/go-ethereum/common"
|
|
|
|
// Node is a wrapper which contains the encoded blob of the trie node and its
|
|
// unique hash identifier. It is general enough that can be used to represent
|
|
// trie nodes corresponding to different trie implementations.
|
|
type Node struct {
|
|
Hash common.Hash // Node hash, empty for deleted node
|
|
Blob []byte // Encoded node blob, nil for the deleted node
|
|
}
|
|
|
|
// Size returns the total memory size used by this node.
|
|
func (n *Node) Size() int {
|
|
return len(n.Blob) + common.HashLength
|
|
}
|
|
|
|
// IsDeleted returns the indicator if the node is marked as deleted.
|
|
func (n *Node) IsDeleted() bool {
|
|
return n.Hash == (common.Hash{})
|
|
}
|
|
|
|
// WithPrev wraps the Node with the previous node value attached.
|
|
type WithPrev struct {
|
|
*Node
|
|
Prev []byte // Encoded original value, nil means it's non-existent
|
|
}
|
|
|
|
// Unwrap returns the internal Node object.
|
|
func (n *WithPrev) Unwrap() *Node {
|
|
return n.Node
|
|
}
|
|
|
|
// Size returns the total memory size used by this node. It overloads
|
|
// the function in Node by counting the size of previous value as well.
|
|
func (n *WithPrev) Size() int {
|
|
return n.Node.Size() + len(n.Prev)
|
|
}
|
|
|
|
// New constructs a node with provided node information.
|
|
func New(hash common.Hash, blob []byte) *Node {
|
|
return &Node{Hash: hash, Blob: blob}
|
|
}
|
|
|
|
// NewWithPrev constructs a node with provided node information.
|
|
func NewWithPrev(hash common.Hash, blob []byte, prev []byte) *WithPrev {
|
|
return &WithPrev{
|
|
Node: New(hash, blob),
|
|
Prev: prev,
|
|
}
|
|
}
|
|
|