//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#pragma once
#include "td/utils/common.h"
#include "td/utils/StringBuilder.h"
#include <functional>
#include <type_traits>
namespace td {
class FileId {
int32 id = 0;
int32 remote_id = 0;
public:
FileId() = default;
explicit FileId(int32 file_id, int32 remote_id) : id(file_id), remote_id(remote_id) {
}
explicit FileId(int32 file_id) : FileId(file_id, 0) {
template <class T, typename = std::enable_if_t<std::is_convertible<T, int32>::value>>
FileId(T file_id) = delete;
bool empty() const {
return id <= 0;
bool is_valid() const {
return id > 0;
int32 get() const {
return id;
int32 get_remote() const {
return remote_id;
bool operator<(const FileId &other) const {
return id < other.id;
bool operator==(const FileId &other) const {
return id == other.id;
bool operator!=(const FileId &other) const {
return id != other.id;
};
struct FileIdHash {
std::size_t operator()(FileId file_id) const {
return std::hash<int32>()(file_id.get());
inline StringBuilder &operator<<(StringBuilder &string_builder, FileId file_id) {
return string_builder << file_id.get() << "(" << file_id.get_remote() << ")";
} // namespace td