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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2026
//
// 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/StorerBase.h"
#include "td/utils/common.h"
#include "td/utils/Slice.h"
#include "td/utils/tl_storers.h"
#include <cstring>
#include <limits>
namespace td {
class SliceStorer final : public Storer {
Slice slice;
public:
explicit SliceStorer(Slice slice) : slice(slice) {
}
size_t size() const final {
return slice.size();
}
size_t store(uint8 *ptr) const final {
std::memcpy(ptr, slice.ubegin(), slice.size());
return slice.size();
}
};
inline SliceStorer create_storer(Slice slice) {
return SliceStorer(slice);
}
class ConcatStorer final : public Storer {
const Storer &a_;
const Storer &b_;
public:
ConcatStorer(const Storer &a, const Storer &b) : a_(a), b_(b) {
}
size_t size() const final {
return a_.size() + b_.size();
}
size_t store(uint8 *ptr) const final {
uint8 *ptr_save = ptr;
ptr += a_.store(ptr);
ptr += b_.store(ptr);
return ptr - ptr_save;
}
};
inline ConcatStorer create_storer(const Storer &a, const Storer &b) {
return ConcatStorer(a, b);
}
template <class T>
class DefaultStorer final : public Storer {
public:
explicit DefaultStorer(const T &object) : object_(object) {
}
size_t size() const final {
if (size_ == std::numeric_limits<size_t>::max()) {
size_ = tl_calc_length(object_);
}
return size_;
}
size_t store(uint8 *ptr) const final {
return tl_store_unsafe(object_, ptr);
}
private:
mutable size_t size_ = std::numeric_limits<size_t>::max();
const T &object_;
};
template <class T>
DefaultStorer<T> create_default_storer(const T &from) {
return DefaultStorer<T>(from);
}
} // namespace td
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