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75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
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/*
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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 2017-2019 Telegram Systems LLP
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*/
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#include "td/db/MemoryKeyValue.h"
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#include "td/utils/format.h"
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namespace td {
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Result<MemoryKeyValue::GetStatus> MemoryKeyValue::get(Slice key, std::string &value) {
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auto it = map_.find(key);
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if (it == map_.end()) {
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return GetStatus::NotFound;
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}
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value = it->second;
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return GetStatus::Ok;
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}
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Status MemoryKeyValue::set(Slice key, Slice value) {
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map_[key.str()] = value.str();
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return Status::OK();
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}
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Status MemoryKeyValue::erase(Slice key) {
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auto it = map_.find(key);
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if (it != map_.end()) {
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map_.erase(it);
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}
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return Status::OK();
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}
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Result<size_t> MemoryKeyValue::count(Slice prefix) {
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size_t res = 0;
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for (auto it = map_.lower_bound(prefix); it != map_.end(); it++) {
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if (Slice(it->first).truncate(prefix.size()) != prefix) {
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break;
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}
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res++;
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}
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return res;
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}
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std::unique_ptr<KeyValueReader> MemoryKeyValue::snapshot() {
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auto res = std::make_unique<MemoryKeyValue>();
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res->map_ = map_;
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return std::move(res);
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}
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std::string MemoryKeyValue::stats() const {
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return PSTRING() << "MemoryKeyValueStats{" << tag("get_count", get_count_) << "}";
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}
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Status MemoryKeyValue::begin_transaction() {
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UNREACHABLE();
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}
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Status MemoryKeyValue::commit_transaction() {
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UNREACHABLE();
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}
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Status MemoryKeyValue::abort_transaction() {
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UNREACHABLE();
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}
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} // namespace td
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