mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
118 lines
2.6 KiB
C++
118 lines
2.6 KiB
C++
/*
|
|
This file is part of TON Blockchain Library.
|
|
|
|
TON Blockchain Library is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation, either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
TON Blockchain Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
Copyright 2017-2020 Telegram Systems LLP
|
|
*/
|
|
#pragma once
|
|
|
|
#include "td/utils/common.h"
|
|
|
|
#if TD_HAVE_ZLIB
|
|
#include "td/utils/buffer.h"
|
|
#include "td/utils/Slice.h"
|
|
#include "td/utils/Status.h"
|
|
|
|
namespace td {
|
|
|
|
class Gzip {
|
|
public:
|
|
Gzip();
|
|
Gzip(const Gzip &) = delete;
|
|
Gzip &operator=(const Gzip &) = delete;
|
|
Gzip(Gzip &&other);
|
|
Gzip &operator=(Gzip &&other);
|
|
~Gzip();
|
|
|
|
enum class Mode { Empty, Encode, Decode };
|
|
Status init(Mode mode) TD_WARN_UNUSED_RESULT {
|
|
if (mode == Mode::Encode) {
|
|
return init_encode();
|
|
} else if (mode == Mode::Decode) {
|
|
return init_decode();
|
|
}
|
|
clear();
|
|
return Status::OK();
|
|
}
|
|
|
|
Status init_encode() TD_WARN_UNUSED_RESULT;
|
|
|
|
Status init_decode() TD_WARN_UNUSED_RESULT;
|
|
|
|
void set_input(Slice input);
|
|
|
|
void set_output(MutableSlice output);
|
|
|
|
void close_input() {
|
|
close_input_flag_ = true;
|
|
}
|
|
|
|
bool need_input() const {
|
|
return left_input() == 0;
|
|
}
|
|
|
|
bool need_output() const {
|
|
return left_output() == 0;
|
|
}
|
|
|
|
size_t left_input() const;
|
|
|
|
size_t left_output() const;
|
|
|
|
size_t used_input() const {
|
|
return input_size_ - left_input();
|
|
}
|
|
|
|
size_t used_output() const {
|
|
return output_size_ - left_output();
|
|
}
|
|
|
|
size_t flush_input() {
|
|
auto res = used_input();
|
|
input_size_ = left_input();
|
|
return res;
|
|
}
|
|
|
|
size_t flush_output() {
|
|
auto res = used_output();
|
|
output_size_ = left_output();
|
|
return res;
|
|
}
|
|
|
|
enum class State { Running, Done };
|
|
Result<State> run() TD_WARN_UNUSED_RESULT;
|
|
|
|
private:
|
|
class Impl;
|
|
unique_ptr<Impl> impl_;
|
|
|
|
size_t input_size_ = 0;
|
|
size_t output_size_ = 0;
|
|
bool close_input_flag_ = false;
|
|
Mode mode_ = Mode::Empty;
|
|
|
|
void init_common();
|
|
void clear();
|
|
|
|
void swap(Gzip &other);
|
|
};
|
|
|
|
BufferSlice gzdecode(Slice s);
|
|
|
|
BufferSlice gzencode(Slice s, double max_compression_ratio);
|
|
|
|
} // namespace td
|
|
|
|
#endif
|