1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/*
* Copyright (c) 2019, 2025, Oracle and/or its affiliates.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2.0,
* as published by the Free Software Foundation.
*
* This program is designed to work with certain software (including
* but not limited to OpenSSL) that is licensed under separate terms,
* as designated in a particular file or component or in included license
* documentation. The authors of MySQL hereby grant you an additional
* permission to link the program and your derivative works with the
* separately licensed software that they have either included with
* the program or referenced in the documentation.
*
* This program 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 General Public License, version 2.0, for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
// MySQL DB access module, for use by plugins and others
// For the module that implements interactive DB functionality see mod_db
#include "plugin/x/client/xcompression_impl.h"
#include <limits>
#include <memory>
#include "my_dbug.h" // NOLINT(build/include_subdir)
#include "plugin/x/protocol/stream/compression/compression_algorithm_lz4.h"
#include "plugin/x/protocol/stream/compression/compression_algorithm_zlib.h"
#include "plugin/x/protocol/stream/compression/compression_algorithm_zstd.h"
#include "plugin/x/protocol/stream/compression/decompression_algorithm_lz4.h"
#include "plugin/x/protocol/stream/compression/decompression_algorithm_zlib.h"
#include "plugin/x/protocol/stream/compression/decompression_algorithm_zstd.h"
#include "plugin/x/protocol/stream/compression_output_stream.h"
#include "plugin/x/protocol/stream/decompression_input_stream.h"
namespace xcl {
bool Compression_impl::reinitialize(const Compression_algorithm algorithm) {
DBUG_LOG("debug", "Compression_impl::reinitialize(algorithm:"
<< static_cast<int32_t>(algorithm) << ")");
switch (algorithm) {
case Compression_algorithm::k_deflate:
m_downlink_stream.reset(new protocol::Decompression_algorithm_zlib());
m_uplink_stream.reset(new protocol::Compression_algorithm_zlib(3));
return true;
case Compression_algorithm::k_lz4:
m_downlink_stream.reset(new protocol::Decompression_algorithm_lz4());
m_uplink_stream.reset(new protocol::Compression_algorithm_lz4(2));
return true;
case Compression_algorithm::k_zstd:
m_downlink_stream.reset(new protocol::Decompression_algorithm_zstd());
m_uplink_stream.reset(new protocol::Compression_algorithm_zstd(3));
return true;
case Compression_algorithm::k_none: {
}
}
return false;
}
namespace {
template <typename Compression_algorithm>
int32_t adjust_level(const int32_t level) {
if (level < Compression_algorithm::get_level_min())
return Compression_algorithm::get_level_min();
if (level > Compression_algorithm::get_level_max())
return Compression_algorithm::get_level_max();
return level;
}
} // namespace
bool Compression_impl::reinitialize(const Compression_algorithm algorithm,
const int32_t level) {
DBUG_LOG("debug", "Compression_impl::reinitialize(algorithm:"
<< static_cast<int32_t>(algorithm)
<< " level:" << static_cast<int32_t>(level) << ")");
switch (algorithm) {
case Compression_algorithm::k_deflate:
m_downlink_stream.reset(new protocol::Decompression_algorithm_zlib());
m_uplink_stream.reset(new protocol::Compression_algorithm_zlib(
adjust_level<protocol::Compression_algorithm_zlib>(level)));
return true;
case Compression_algorithm::k_lz4:
m_downlink_stream.reset(new protocol::Decompression_algorithm_lz4());
m_uplink_stream.reset(new protocol::Compression_algorithm_lz4(
adjust_level<protocol::Compression_algorithm_lz4>(level)));
return true;
case Compression_algorithm::k_zstd:
m_downlink_stream.reset(new protocol::Decompression_algorithm_zstd());
m_uplink_stream.reset(new protocol::Compression_algorithm_zstd(
level == 0
? 1
: adjust_level<protocol::Compression_algorithm_zstd>(level)));
return true;
case Compression_algorithm::k_none: {
}
}
return false;
}
Compression_impl::Output_stream_ptr Compression_impl::uplink(
Output_stream *source) {
if (!m_uplink_stream) return {};
return std::make_shared<protocol::Compression_output_stream>(
m_uplink_stream.get(), source);
}
Compression_impl::Input_stream_ptr Compression_impl::downlink(
Input_stream *source) {
if (!m_uplink_stream) return {};
return std::make_shared<protocol::Decompression_input_stream>(
m_downlink_stream.get(), source);
}
} // namespace xcl
|
