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- // 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
- // TODO: Consider removing this implementation, as it is no longer used.
- 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
- }
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