mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
90 lines
2.1 KiB
C++
90 lines
2.1 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2020 Telegram Systems LLP
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*/
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#pragma once
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#include "td/utils/common.h"
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#include "td/utils/Span.h"
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#include <utility>
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namespace td {
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template <class T>
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class VectorQueue {
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public:
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template <class S>
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void push(S &&s) {
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vector_.emplace_back(std::forward<S>(s));
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}
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template <class... Args>
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void emplace(Args &&... args) {
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vector_.emplace_back(std::forward<Args>(args)...);
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}
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T pop() {
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try_shrink();
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return std::move(vector_[read_pos_++]);
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}
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void pop_n(size_t n) {
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read_pos_ += n;
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try_shrink();
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}
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T &front() {
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return vector_[read_pos_];
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}
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T &back() {
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return vector_.back();
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}
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const T &front() const {
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return vector_[read_pos_];
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}
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const T &back() const {
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return vector_.back();
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}
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bool empty() const {
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return size() == 0;
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}
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size_t size() const {
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return vector_.size() - read_pos_;
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}
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const T *data() const {
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return vector_.data() + read_pos_;
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}
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T *data() {
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return vector_.data() + read_pos_;
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}
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Span<T> as_span() const {
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return {data(), size()};
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}
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MutableSpan<T> as_mutable_span() {
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return {vector_.data() + read_pos_, size()};
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}
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private:
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vector<T> vector_;
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size_t read_pos_{0};
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void try_shrink() {
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if (read_pos_ * 2 > vector_.size() && read_pos_ > 4) {
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vector_.erase(vector_.begin(), vector_.begin() + read_pos_);
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read_pos_ = 0;
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}
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}
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};
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} // namespace td
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