mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
118 lines
2.5 KiB
C++
118 lines
2.5 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2019 Telegram Systems LLP
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*/
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#pragma once
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#include "td/utils/common.h"
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#if TD_HAVE_ZLIB
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#include "td/utils/buffer.h"
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#include "td/utils/Slice.h"
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#include "td/utils/Status.h"
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namespace td {
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class Gzip {
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public:
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Gzip();
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Gzip(const Gzip &) = delete;
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Gzip &operator=(const Gzip &) = delete;
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Gzip(Gzip &&other);
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Gzip &operator=(Gzip &&other);
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~Gzip();
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enum Mode { Empty, Encode, Decode };
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Status init(Mode mode) TD_WARN_UNUSED_RESULT {
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if (mode == Encode) {
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return init_encode();
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} else if (mode == Decode) {
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return init_decode();
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}
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clear();
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return Status::OK();
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}
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Status init_encode() TD_WARN_UNUSED_RESULT;
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Status init_decode() TD_WARN_UNUSED_RESULT;
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void set_input(Slice input);
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void set_output(MutableSlice output);
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void close_input() {
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close_input_flag_ = true;
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}
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bool need_input() const {
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return left_input() == 0;
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}
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bool need_output() const {
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return left_output() == 0;
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}
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size_t left_input() const;
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size_t left_output() const;
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size_t used_input() const {
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return input_size_ - left_input();
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}
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size_t used_output() const {
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return output_size_ - left_output();
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}
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size_t flush_input() {
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auto res = used_input();
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input_size_ = left_input();
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return res;
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}
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size_t flush_output() {
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auto res = used_output();
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output_size_ = left_output();
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return res;
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}
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enum State { Running, Done };
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Result<State> run() TD_WARN_UNUSED_RESULT;
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private:
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class Impl;
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unique_ptr<Impl> impl_;
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size_t input_size_ = 0;
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size_t output_size_ = 0;
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bool close_input_flag_ = false;
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Mode mode_ = Empty;
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void init_common();
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void clear();
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void swap(Gzip &other);
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};
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BufferSlice gzdecode(Slice s);
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BufferSlice gzencode(Slice s, double k = 0.9);
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} // namespace td
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#endif
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