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79 lines
2.8 KiB
79 lines
2.8 KiB
5 months ago
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/*
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Copyright (c) 2015, 2019, Oracle and/or its affiliates. All Rights Reserved.
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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 */
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