MySQL 8.0.31
Source Code Documentation
dict0sdi-decompress.h
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26
27#ifndef DICT_SDI_DECOMPRESS_H
28#define DICT_SDI_DECOMPRESS_H
29
30#include <zlib.h>
31
32/** Decompress SDI record */
34 public:
35 Sdi_Decompressor(byte *uncomp_sdi, uint32_t uncomp_len, byte *comp_sdi,
36 uint32_t comp_len)
37 : m_uncomp_sdi(uncomp_sdi),
38 m_uncomp_len(uncomp_len),
39 m_comp_sdi(comp_sdi),
40 m_comp_len(comp_len) {
41 ut_ad(m_uncomp_sdi != nullptr);
42 ut_ad(m_comp_sdi != nullptr);
43 }
44
45 ~Sdi_Decompressor() = default;
46
47 /** Decompress the SDI and store in the buffer passed. */
48 inline void decompress() {
49 int ret;
50 uLongf dest_len = m_uncomp_len;
51 ret = uncompress(m_uncomp_sdi, &dest_len, m_comp_sdi, m_comp_len);
52
53 if (ret != Z_OK) {
54#ifdef UNIV_NO_ERR_MSGS
55 ib::error()
56#else
57 ib::error(ER_IB_ERR_ZLIB_UNCOMPRESS_FAILED)
58#endif
59 << "ZLIB uncompress() failed:"
60 << " compressed len: " << m_comp_len
61 << ", original_len: " << m_uncomp_len;
62
63 switch (ret) {
64 case Z_BUF_ERROR:
65#ifdef UNIV_NO_ERR_MSGS
67#else
68 ib::fatal(UT_LOCATION_HERE, ER_IB_ERR_ZLIB_BUF_ERROR)
69#endif
70
71 << "retval = Z_BUF_ERROR";
72 break;
73
74 case Z_MEM_ERROR:
75#ifdef UNIV_NO_ERR_MSGS
77#else
78 ib::fatal(UT_LOCATION_HERE, ER_IB_ERR_ZLIB_MEM_ERROR)
79#endif
80 << "retval = Z_MEM_ERROR";
81 break;
82
83 case Z_DATA_ERROR:
84#ifdef UNIV_NO_ERR_MSGS
86#else
87 ib::fatal(UT_LOCATION_HERE, ER_IB_ERR_ZLIB_DATA_ERROR)
88#endif
89 << "retval = Z_DATA_ERROR";
90 break;
91
92 default:
93#ifdef UNIV_NO_ERR_MSGS
95#else
96 ib::fatal(UT_LOCATION_HERE, ER_IB_ERR_ZLIB_UNKNOWN_ERROR)
97#endif
98 << "retval = UNKNOWN_ERROR";
99 break;
100 }
101 }
102 }
103
104 /** @return the uncompressed sdi */
105 byte *get_data() const { return (m_uncomp_sdi); }
106
107 private:
108 /** Buffer to hold uncompressed SDI. memory allocated by caller */
110 /** Length of Outbuf Buffer */
111 uint32_t m_uncomp_len;
112 /** Input Compressed SDI */
114 /** Length of Compressed SDI */
115 uint32_t m_comp_len;
116};
117#endif
#define Z_BUF_ERROR
Definition: azlib.h:170
#define Z_OK
Definition: azlib.h:163
#define Z_DATA_ERROR
Definition: azlib.h:168
#define Z_MEM_ERROR
Definition: azlib.h:169
Decompress SDI record.
Definition: dict0sdi-decompress.h:33
void decompress()
Decompress the SDI and store in the buffer passed.
Definition: dict0sdi-decompress.h:48
uint32_t m_comp_len
Length of Compressed SDI.
Definition: dict0sdi-decompress.h:115
byte * m_uncomp_sdi
Buffer to hold uncompressed SDI.
Definition: dict0sdi-decompress.h:109
Sdi_Decompressor(byte *uncomp_sdi, uint32_t uncomp_len, byte *comp_sdi, uint32_t comp_len)
Definition: dict0sdi-decompress.h:35
uint32_t m_uncomp_len
Length of Outbuf Buffer.
Definition: dict0sdi-decompress.h:111
~Sdi_Decompressor()=default
byte * get_data() const
Definition: dict0sdi-decompress.h:105
byte * m_comp_sdi
Input Compressed SDI.
Definition: dict0sdi-decompress.h:113
The class error is used to emit error messages.
Definition: ut0log.h:229
The class fatal is used to emit an error message and stop the server by crashing it.
Definition: ut0log.h:251
#define UT_LOCATION_HERE
Definition: ut0core.h:46
#define ut_ad(EXPR)
Debug assertion.
Definition: ut0dbg.h:68