110 lines
2.3 KiB
C++
110 lines
2.3 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
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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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#pragma once
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#include "td/utils/common.h"
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#include "td/utils/StringBuilder.h"
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#include <tuple>
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namespace td {
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class DcId {
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public:
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DcId() = default;
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static bool is_valid(int32 dc_id) {
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return 1 <= dc_id && dc_id <= 1000;
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}
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static DcId main() {
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return DcId{MainDc, false};
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}
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static DcId invalid() {
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return DcId{Invalid, false};
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}
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static DcId internal(int32 id) {
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CHECK(is_valid(id));
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return DcId{id, false};
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}
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static DcId external(int32 id) {
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CHECK(is_valid(id));
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return DcId{id, true};
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}
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static DcId empty() {
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return {};
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}
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static DcId from_value(int32 value) {
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return DcId{value, false};
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}
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bool is_empty() const {
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return !is_valid();
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}
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bool is_main() const {
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return dc_id_ == MainDc;
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}
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int32 get_raw_id() const {
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CHECK(is_exact());
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return dc_id_;
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}
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int32 get_value() const {
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return dc_id_;
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}
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bool is_internal() const {
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return !is_external();
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}
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bool is_external() const {
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return is_external_;
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}
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bool is_exact() const {
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return dc_id_ > 0;
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}
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bool operator==(DcId other) const {
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return dc_id_ == other.dc_id_ && is_external_ == other.is_external_;
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}
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bool operator<(DcId other) const {
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return std::tie(dc_id_, is_external_) < std::tie(other.dc_id_, other.is_external_);
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}
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bool operator!=(DcId other) const {
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return !(*this == other);
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}
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private:
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enum : int32 { Empty = 0, MainDc = -1, Invalid = -2 };
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int32 dc_id_{Empty};
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bool is_external_{false};
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DcId(int32 dc_id, bool is_external) : dc_id_(dc_id), is_external_(is_external) {
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}
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bool is_valid() const {
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return is_exact() || is_main();
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}
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};
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inline StringBuilder &operator<<(StringBuilder &sb, const DcId &dc_id) {
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sb << "DcId{";
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if (dc_id == DcId::invalid()) {
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sb << "invalid";
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} else if (dc_id == DcId()) {
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sb << "empty";
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} else if (dc_id.is_empty()) {
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sb << "is_empty";
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} else if (dc_id.is_main()) {
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sb << "main";
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} else {
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sb << dc_id.get_raw_id();
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if (dc_id.is_external()) {
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sb << " external";
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}
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}
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sb << "}";
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return sb;
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}
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} // namespace td
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