forked from cerc-io/plugeth
4535230059
* cmd, core, eth: init tx lookup in background * core/rawdb: tiny log fixes to make it clearer what's happening * core, eth: fix rebase errors * core/rawdb: make reindexing less generic, but more optimal * rlp: implement rlp list iterator * core/rawdb: new implementation of tx indexing/unindex using generic tx iterator and hashing rlp-data * core/rawdb, cmd/utils: fix review concerns * cmd/utils: fix merge issue * core/rawdb: add some log formatting polishes Co-authored-by: rjl493456442 <garyrong0905@gmail.com> Co-authored-by: Péter Szilágyi <peterke@gmail.com>
61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
// Copyright 2019 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 rlp
|
|
|
|
type listIterator struct {
|
|
data []byte
|
|
next []byte
|
|
err error
|
|
}
|
|
|
|
// NewListIterator creates an iterator for the (list) represented by data
|
|
func NewListIterator(data RawValue) (*listIterator, error) {
|
|
k, t, c, err := readKind(data)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if k != List {
|
|
return nil, ErrExpectedList
|
|
}
|
|
it := &listIterator{
|
|
data: data[t : t+c],
|
|
}
|
|
return it, nil
|
|
|
|
}
|
|
|
|
// Next forwards the iterator one step, returns true if it was not at end yet
|
|
func (it *listIterator) Next() bool {
|
|
if len(it.data) == 0 {
|
|
return false
|
|
}
|
|
_, t, c, err := readKind(it.data)
|
|
it.next = it.data[:t+c]
|
|
it.data = it.data[t+c:]
|
|
it.err = err
|
|
return true
|
|
}
|
|
|
|
// Value returns the current value
|
|
func (it *listIterator) Value() []byte {
|
|
return it.next
|
|
}
|
|
|
|
func (it *listIterator) Err() error {
|
|
return it.err
|
|
}
|