tdlight/td/mtproto/utils.h

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//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2023
//
// 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/Storer.h"
#include "td/utils/StorerBase.h"
#include "td/utils/tl_storers.h"
#include <limits>
namespace td {
template <class T>
using TLStorer = DefaultStorer<T>;
template <class T>
class TLObjectStorer final : public Storer {
mutable size_t size_ = std::numeric_limits<size_t>::max();
const T &object_;
public:
explicit TLObjectStorer(const T &object) : object_(object) {
}
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size_t size() const final {
if (size_ == std::numeric_limits<size_t>::max()) {
TlStorerCalcLength storer;
storer.store_binary(T::ID);
object_.store(storer);
size_ = storer.get_length();
}
return size_;
}
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size_t store(uint8 *ptr) const final {
TlStorerUnsafe storer(ptr);
storer.store_binary(T::ID);
object_.store(storer);
return static_cast<size_t>(storer.get_buf() - ptr);
}
};
namespace mtproto_api {
class Function;
} // namespace mtproto_api
namespace mtproto {
TLStorer<mtproto_api::Function> create_function_storer(const mtproto_api::Function &function);
} // namespace mtproto
} // namespace td