| Disk ARchive 2.8.1 Full featured and portable backup and archiving tool

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gzip_module.hpp
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1/*********************************************************************/
2// dar - disk archive - a backup/restoration program
3// Copyright (C) 2002-2025 Denis Corbin
4//
5// This program is free software; you can redistribute it and/or
6// modify it under the terms of the GNU General Public License
7// as published by the Free Software Foundation; either version 2
8// of the License, or (at your option) any later version.
9//
10// This program is distributed in the hope that it will be useful,
11// but WITHOUT ANY WARRANTY; without even the implied warranty of
12// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13// GNU General Public License for more details.
14//
15// You should have received a copy of the GNU General Public License
16// along with this program; if not, write to the Free Software
17// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18//
19// to contact the author, see the AUTHOR file
20/*********************************************************************/
21
26
27#ifndef GZIP_MODULE_HPP
28#define GZIP_MODULE_HPP
29
30extern "C"
31{
32}
33
34#include "../my_config.h"
35
36#include "compress_module.hpp"
37
38namespace libdar
39{
40
43
44 class gzip_module: public compress_module
45 {
46 public:
47 gzip_module(U_I compression_level = 9);
48 gzip_module(const gzip_module & ref) = default;
49 gzip_module(gzip_module && ref) noexcept = default;
50 gzip_module & operator = (const gzip_module & ref) = default;
51 gzip_module & operator = (gzip_module && ref) noexcept = default;
52 virtual ~gzip_module() noexcept = default;
53
54 // inherited from compress_module interface
55
56 virtual compression get_algo() const override { return compression::gzip; };
57
58 virtual U_I get_max_compressing_size() const override;
59
60 virtual U_I get_min_size_to_compress(U_I clear_size) const override;
61
62 virtual U_I compress_data(const char *normal,
63 const U_I normal_size,
64 char *zip_buf,
65 U_I zip_buf_size) const override;
66
67 virtual U_I uncompress_data(const char *zip_buf,
68 const U_I zip_buf_size,
69 char *normal,
70 U_I normal_size) const override;
71
72
73 virtual std::unique_ptr<compress_module> clone() const override;
74
75 private:
76 U_I level;
77
78 };
80
81} // end of namespace
82
83#endif
compress_module.hpp
provides abstracted interface of per-block compression/decompression
libdar::compression
compression
the different compression algorithm available
Definition compression.hpp:46
libdar::compression::gzip
@ gzip
gzip compression (streamed)
my_config.h
include macro defined by the configure script and some specific additional ones
libdar
libdar namespace encapsulate all libdar symbols
Definition archive.hpp:47