mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
78 lines
1.9 KiB
C++
78 lines
1.9 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/Slice.h"
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#include <set>
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namespace vm {
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template <class InfoT>
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class CellHashTable {
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public:
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template <class F>
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InfoT &apply(td::Slice hash, F &&f) {
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auto it = set_.find(hash);
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if (it != set_.end()) {
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auto &res = const_cast<InfoT &>(*it);
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f(res);
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return res;
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}
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InfoT info;
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f(info);
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auto &res = const_cast<InfoT &>(*(set_.insert(std::move(info)).first));
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return res;
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}
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template <class F>
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void for_each(F &&f) {
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for (auto &info : set_) {
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f(info);
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}
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}
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template <class F>
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void filter(F &&f) {
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for (auto it = set_.begin(); it != set_.end();) {
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if (f(*it)) {
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it++;
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} else {
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it = set_.erase(it);
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}
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}
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}
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void erase(td::Slice hash) {
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auto it = set_.find(hash);
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CHECK(it != set_.end());
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set_.erase(it);
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}
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size_t size() const {
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return set_.size();
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}
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InfoT* get_if_exists(td::Slice hash) {
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auto it = set_.find(hash);
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if (it != set_.end()) {
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return &const_cast<InfoT &>(*it);
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}
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return nullptr;
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}
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private:
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std::set<InfoT, std::less<>> set_;
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};
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} // namespace vm
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