236 lines
7.9 KiB
C++
236 lines
7.9 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2023
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/telegram/OrderedMessage.h"
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#include "td/utils/logging.h"
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namespace td {
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OrderedMessage *OrderedMessages::insert(MessageId message_id) {
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auto random_y = static_cast<int32>(static_cast<uint32>(message_id.get() * 2101234567u));
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unique_ptr<OrderedMessage> *v = &messages_;
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while (*v != nullptr && (*v)->random_y >= random_y) {
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if ((*v)->message_id.get() < message_id.get()) {
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v = &(*v)->right;
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} else if ((*v)->message_id == message_id) {
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UNREACHABLE();
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} else {
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v = &(*v)->left;
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}
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}
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auto message = make_unique<OrderedMessage>();
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message->message_id = message_id;
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message->random_y = random_y;
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unique_ptr<OrderedMessage> *left = &message->left;
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unique_ptr<OrderedMessage> *right = &message->right;
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unique_ptr<OrderedMessage> cur = std::move(*v);
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while (cur != nullptr) {
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if (cur->message_id.get() < message_id.get()) {
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*left = std::move(cur);
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left = &((*left)->right);
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cur = std::move(*left);
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} else {
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*right = std::move(cur);
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right = &((*right)->left);
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cur = std::move(*right);
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}
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}
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CHECK(*left == nullptr);
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CHECK(*right == nullptr);
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*v = std::move(message);
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return v->get();
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}
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void OrderedMessages::erase(MessageId message_id) {
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unique_ptr<OrderedMessage> *v = &messages_;
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while (*v != nullptr) {
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if ((*v)->message_id.get() < message_id.get()) {
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v = &(*v)->right;
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} else if ((*v)->message_id.get() > message_id.get()) {
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v = &(*v)->left;
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} else {
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break;
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}
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}
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unique_ptr<OrderedMessage> result = std::move(*v);
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CHECK(result != nullptr);
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unique_ptr<OrderedMessage> left = std::move(result->left);
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unique_ptr<OrderedMessage> right = std::move(result->right);
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while (left != nullptr || right != nullptr) {
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if (left == nullptr || (right != nullptr && right->random_y > left->random_y)) {
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*v = std::move(right);
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v = &((*v)->left);
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right = std::move(*v);
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} else {
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*v = std::move(left);
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v = &((*v)->right);
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left = std::move(*v);
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}
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}
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CHECK(*v == nullptr);
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}
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void OrderedMessages::attach_message_to_previous(MessageId message_id, const char *source) {
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CHECK(message_id.is_valid());
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auto it = get_iterator(message_id);
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OrderedMessage *ordered_message = *it;
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CHECK(ordered_message != nullptr);
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CHECK(ordered_message->message_id == message_id);
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if (ordered_message->have_previous) {
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return;
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}
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ordered_message->have_previous = true;
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--it;
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LOG_CHECK(*it != nullptr) << message_id << ' ' << source;
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LOG(INFO) << "Attach " << message_id << " to the previous " << (*it)->message_id << " from " << source;
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if ((*it)->have_next) {
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ordered_message->have_next = true;
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} else {
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(*it)->have_next = true;
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}
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}
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void OrderedMessages::attach_message_to_next(MessageId message_id, const char *source) {
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CHECK(message_id.is_valid());
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auto it = get_iterator(message_id);
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OrderedMessage *ordered_message = *it;
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CHECK(ordered_message != nullptr);
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CHECK(ordered_message->message_id == message_id);
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if (ordered_message->have_next) {
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return;
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}
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ordered_message->have_next = true;
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++it;
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LOG_CHECK(*it != nullptr) << message_id << ' ' << source;
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LOG(INFO) << "Attach " << message_id << " to the next " << (*it)->message_id << " from " << source;
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if ((*it)->have_previous) {
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ordered_message->have_previous = true;
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} else {
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(*it)->have_previous = true;
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}
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}
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static void do_find_older_messages(const OrderedMessage *ordered_message, MessageId max_message_id,
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vector<MessageId> &message_ids) {
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if (ordered_message == nullptr) {
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return;
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}
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do_find_older_messages(ordered_message->left.get(), max_message_id, message_ids);
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if (ordered_message->message_id <= max_message_id) {
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message_ids.push_back(ordered_message->message_id);
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do_find_older_messages(ordered_message->right.get(), max_message_id, message_ids);
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}
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}
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vector<MessageId> OrderedMessages::find_older_messages(MessageId max_message_id) const {
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vector<MessageId> message_ids;
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do_find_older_messages(messages_.get(), max_message_id, message_ids);
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return message_ids;
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}
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static void do_find_newer_messages(const OrderedMessage *ordered_message, MessageId min_message_id,
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vector<MessageId> &message_ids) {
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if (ordered_message == nullptr) {
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return;
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}
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if (ordered_message->message_id > min_message_id) {
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do_find_newer_messages(ordered_message->left.get(), min_message_id, message_ids);
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message_ids.push_back(ordered_message->message_id);
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}
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do_find_newer_messages(ordered_message->right.get(), min_message_id, message_ids);
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}
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vector<MessageId> OrderedMessages::find_newer_messages(MessageId min_message_id) const {
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vector<MessageId> message_ids;
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do_find_newer_messages(messages_.get(), min_message_id, message_ids);
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return message_ids;
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}
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static MessageId do_find_message_by_date(const OrderedMessage *ordered_message, int32 date,
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const std::function<int32(MessageId)> &get_message_date) {
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if (ordered_message == nullptr) {
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return MessageId();
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}
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auto message_date = get_message_date(ordered_message->message_id);
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if (message_date > date) {
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return do_find_message_by_date(ordered_message->left.get(), date, get_message_date);
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}
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auto message_id = do_find_message_by_date(ordered_message->right.get(), date, get_message_date);
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if (message_id.is_valid()) {
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return message_id;
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}
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return ordered_message->message_id;
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}
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MessageId OrderedMessages::find_message_by_date(int32 date,
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const std::function<int32(MessageId)> &get_message_date) const {
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return do_find_message_by_date(messages_.get(), date, get_message_date);
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}
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static void do_find_messages_by_date(const OrderedMessage *ordered_message, int32 min_date, int32 max_date,
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const std::function<int32(MessageId)> &get_message_date,
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vector<MessageId> &message_ids) {
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if (ordered_message == nullptr) {
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return;
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}
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auto message_date = get_message_date(ordered_message->message_id);
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if (message_date >= min_date) {
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do_find_messages_by_date(ordered_message->left.get(), min_date, max_date, get_message_date, message_ids);
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if (message_date <= max_date) {
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message_ids.push_back(ordered_message->message_id);
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}
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}
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if (message_date <= max_date) {
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do_find_messages_by_date(ordered_message->right.get(), min_date, max_date, get_message_date, message_ids);
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}
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}
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vector<MessageId> OrderedMessages::find_messages_by_date(
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int32 min_date, int32 max_date, const std::function<int32(MessageId)> &get_message_date) const {
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vector<MessageId> message_ids;
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do_find_messages_by_date(messages_.get(), min_date, max_date, get_message_date, message_ids);
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return message_ids;
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}
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static void do_traverse_messages(const OrderedMessage *ordered_message,
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const std::function<bool(MessageId)> &need_scan_older,
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const std::function<bool(MessageId)> &need_scan_newer) {
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if (ordered_message == nullptr) {
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return;
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}
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if (need_scan_older(ordered_message->message_id)) {
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do_traverse_messages(ordered_message->left.get(), need_scan_older, need_scan_newer);
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}
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if (need_scan_newer(ordered_message->message_id)) {
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do_traverse_messages(ordered_message->right.get(), need_scan_older, need_scan_newer);
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}
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}
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void OrderedMessages::traverse_messages(const std::function<bool(MessageId)> &need_scan_older,
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const std::function<bool(MessageId)> &need_scan_newer) const {
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do_traverse_messages(messages_.get(), need_scan_older, need_scan_newer);
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}
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} // namespace td
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