MySQL
8.0.32
Source Code Documentation
xa_aux.h
Go to the documentation of this file.
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/*
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Copyright (c) 2015, 2022, Oracle and/or its affiliates.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef XA_AUX_H
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#define XA_AUX_H
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#include "
m_string.h
"
// _dig_vec_lower
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/**
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Function serializes XID which is characterized by by four last arguments
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of the function.
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Serialized XID is presented in valid hex format and is returned to
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the caller in a buffer pointed by the first argument.
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The buffer size provived by the caller must be not less than
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8 + 2 * XIDDATASIZE + 4 * sizeof(XID::formatID) + 1, see
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XID::serialize_xid() that is a caller and plugin.h for XID declaration.
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@param buf pointer to a buffer allocated for storing serialized data
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@param fmt formatID value
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@param gln gtrid_length value
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@param bln bqual_length value
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@param dat data value
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@return the value of the buffer pointer
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*/
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inline
char
*
serialize_xid
(
char
*
buf
,
long
fmt,
long
gln,
long
bln,
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const
char
*dat) {
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int
i;
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char
*c =
buf
;
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/*
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Build a string like following pattern:
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X'hex11hex12...hex1m',X'hex21hex22...hex2n',11
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and store it into buf.
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Here hex1i and hex2k are hexadecimals representing XID's internal
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raw bytes (1 <= i <= m, 1 <= k <= n), and `m' and `n' even numbers
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half of which corresponding to the lengths of XID's components.
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*/
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*c++ =
'X'
;
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*c++ =
'\''
;
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for
(i = 0; i < gln; i++) {
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*c++ =
_dig_vec_lower
[
static_cast<
uchar
>
(dat[i]) >> 4];
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*c++ =
_dig_vec_lower
[
static_cast<
uchar
>
(dat[i]) & 0x0f];
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}
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*c++ =
'\''
;
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*c++ =
','
;
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*c++ =
'X'
;
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*c++ =
'\''
;
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for
(; i < gln + bln; i++) {
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*c++ =
_dig_vec_lower
[
static_cast<
uchar
>
(dat[i]) >> 4];
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*c++ =
_dig_vec_lower
[
static_cast<
uchar
>
(dat[i]) & 0x0f];
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}
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*c++ =
'\''
;
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sprintf(c,
",%lu"
, fmt);
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return
buf
;
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}
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#endif
/* XA_AUX_H */
m_string.h
_dig_vec_lower
const char _dig_vec_lower[]
Definition:
int2str.cc:40
uchar
unsigned char uchar
Definition:
my_inttypes.h:51
buf
Definition:
buf0block_hint.cc:29
serialize_xid
char * serialize_xid(char *buf, long fmt, long gln, long bln, const char *dat)
Function serializes XID which is characterized by by four last arguments of the function.
Definition:
xa_aux.h:45
sql
xa_aux.h
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