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lzo_module.hpp
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1/*********************************************************************/
2// dar - disk archive - a backup/restoration program
3// Copyright (C) 2002-2026 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 LZO_MODULE_HPP
28#define LZO_MODULE_HPP
29
30 extern "C"
31{
32}
33
34#include "../my_config.h"
35#include <string>
36#include <memory>
37
38#include "compress_module.hpp"
39
40 namespace libdar
41{
42
45
46 class lzo_module: public compress_module
47 {
48 public:
49 lzo_module(compression algo, U_I compression_level = 9) { init(algo, compression_level); };
50 lzo_module(const lzo_module & ref) { init(ref.lzo_algo, ref.level); };
51 lzo_module(lzo_module && ref) noexcept = default;
52 lzo_module & operator = (const lzo_module & ref) { init(ref.lzo_algo, ref.level); return *this; };
53 lzo_module & operator = (lzo_module && ref) noexcept = default;
54 virtual ~lzo_module() noexcept = default;
55
56 // inherited from compress_module interface
57
58 virtual compression get_algo() const override { return compression::lzo; };
59
60 virtual U_I get_max_compressing_size() const override;
61
62 virtual U_I get_min_size_to_compress(U_I clear_size) const override;
63
64 virtual U_I compress_data(const char *normal,
65 const U_I normal_size,
66 char *zip_buf,
67 U_I zip_buf_size) const override;
68
69 virtual U_I uncompress_data(const char *zip_buf,
70 const U_I zip_buf_size,
71 char *normal,
72 U_I normal_size) const override;
73
74
75 virtual std::unique_ptr<compress_module> clone() const override;
76
77 private:
78 compression lzo_algo;
79 U_I level;
80 std::unique_ptr<char[]> wrkmem_decompr;
81 std::unique_ptr<char[]> wrkmem_compr;
82
83 void init(compression algo, U_I compression_level);
84
85 };
87
88} // end of namespace
89
90#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::lzo
@ lzo
lzo compression (streamed)
Definition compression.hpp:50
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