Disk ARchive: compression.hpp Source File

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compression.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
25
26#ifndef COMPRESSION_HPP
27#define COMPRESSION_HPP
28
29#include "../my_config.h"
30#include <string>
31
32namespace libdar
33{
34
37
39
45 enum class compression
46 {
47 none = 'n',
48 gzip = 'z',
49 bzip2 = 'y',
50 lzo = 'l',
51 xz = 'x',
52 lzo1x_1_15 = 'j',
53 lzo1x_1 = 'k',
54 zstd = 'd',
55 lz4 = 'q',
56 };
57
58
60 extern compression char2compression(char a);
61
64 extern bool char2compression_mode(char a);
65
67 extern char compression2char(compression c, bool per_block = false);
68
70 extern std::string compression2string(compression c);
71
73 extern compression string2compression(const std::string & a); // throw Erange if an unknown string is given
74
76
77} // end of namespace
78
79#endif
libdar::compression2string
std::string compression2string(compression c)
convert a compression to its string representation
libdar::compression2char
char compression2char(compression c, bool per_block=false)
convert a compression value to a char for storing in archive
libdar::char2compression_mode
bool char2compression_mode(char a)
libdar::char2compression
compression char2compression(char a)
convert a char as stored in archive to its compression value
libdar::string2compression
compression string2compression(const std::string &a)
convert a string representing a compression algorithm to its enum compression value
libdar::compression
compression
the different compression algorithm available
Definition compression.hpp:46
libdar::hash_algo::none
@ none
no hashing algorithm
Definition archive_aux.hpp:64
libdar::compression::bzip2
@ bzip2
bzip2 compression (streamed)
Definition compression.hpp:49
libdar::compression::zstd
@ zstd
zstd compression
Definition compression.hpp:54
libdar::compression::lzo
@ lzo
lzo compression (streamed)
Definition compression.hpp:50
libdar::compression::lzo1x_1
@ lzo1x_1
lzo degraded algo corresponding to lzo -2 to lzo -6
Definition compression.hpp:53
libdar::compression::lzo1x_1_15
@ lzo1x_1_15
lzo degraded algo corresponding to lzop -1
Definition compression.hpp:52
libdar::compression::gzip
@ gzip
gzip compression (streamed)
Definition compression.hpp:48
libdar::compression::xz
@ xz
lzma compression (streamed)
Definition compression.hpp:51
libdar::compression::lz4
@ lz4
lz4 (streamed)
Definition compression.hpp:55
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