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
|
/*
* 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
*/
#ifndef PLUGIN_X_PROTOCOL_STREAM_COMPRESSION_DECOMPRESSION_ALGORITHM_ZSTD_H_
#define PLUGIN_X_PROTOCOL_STREAM_COMPRESSION_DECOMPRESSION_ALGORITHM_ZSTD_H_
#include "plugin/x/protocol/stream/compression/decompression_algorithm_interface.h"
#include "my_dbug.h" // NOLINT(build/include_subdir)
#include "zstd.h" // NOLINT(build/include_subdir)
namespace protocol {
class Decompression_algorithm_zstd : public Decompression_algorithm_interface {
public:
Decompression_algorithm_zstd() : m_stream{ZSTD_createDStream()} {
ZSTD_initDStream(m_stream);
}
~Decompression_algorithm_zstd() override { ZSTD_freeDStream(m_stream); }
bool needs_input() const override {
DBUG_TRACE;
return m_needs_input;
}
void set_input(uint8_t *in_ptr, const int in_size) override {
DBUG_TRACE;
m_in_buffer = ZSTD_inBuffer{in_ptr, static_cast<size_t>(in_size), 0};
m_needs_input = false;
}
bool decompress(uint8_t *out_ptr, int64_t *out_size) override {
DBUG_TRACE;
ZSTD_outBuffer out_buffer{out_ptr, static_cast<size_t>(*out_size), 0};
const auto result =
ZSTD_decompressStream(m_stream, &out_buffer, &m_in_buffer);
if (ZSTD_isError(result)) {
m_invalid = true;
DBUG_LOG("debug", "ZSTD error: " << ZSTD_getErrorName(result));
*out_size = 0;
return false;
}
*out_size = out_buffer.pos;
m_needs_input = (out_buffer.pos < out_buffer.size) &&
(m_in_buffer.pos == m_in_buffer.size);
return true;
}
bool was_error() const override { return m_invalid; }
bool m_invalid = false;
bool m_needs_input = true;
ZSTD_DStream *m_stream;
ZSTD_inBuffer m_in_buffer{nullptr, 0, 0};
};
} // namespace protocol
#endif // PLUGIN_X_PROTOCOL_STREAM_COMPRESSION_DECOMPRESSION_ALGORITHM_ZSTD_H_
|
