mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 03:52:35 +01:00
df4dd593f2
Merged lp:maria/maria-10.0-galera up to revision 3879. Added a new functions to handler API to forcefully abort_transaction, producing fake_trx_id, get_checkpoint and set_checkpoint for XA. These were added for future possiblity to add more storage engines that could use galera replication.
83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/* Copyright (C) 2009 Codership Oy <info@codersihp.com>
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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 as published by
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the Free Software Foundation; version 2 of the License.
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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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*! @file Helper functions to deal with history UUID string representations */
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#include <errno.h>
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#include <ctype.h>
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#include <stdio.h>
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#include "wsrep_api.h"
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/*!
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* Read UUID from string
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* @return length of UUID string representation or -EINVAL in case of error
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*/
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int
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wsrep_uuid_scan (const char* str, size_t str_len, wsrep_uuid_t* uuid)
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{
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unsigned int uuid_len = 0;
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unsigned int uuid_offt = 0;
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while (uuid_len + 1 < str_len) {
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/* We are skipping potential '-' after uuid_offt == 4, 6, 8, 10
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* which means
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* (uuid_offt >> 1) == 2, 3, 4, 5,
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* which in turn means
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* (uuid_offt >> 1) - 2 <= 3
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* since it is always >= 0, because uuid_offt is unsigned */
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if (((uuid_offt >> 1) - 2) <= 3 && str[uuid_len] == '-') {
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// skip dashes after 4th, 6th, 8th and 10th positions
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uuid_len += 1;
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continue;
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}
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if (isxdigit(str[uuid_len]) && isxdigit(str[uuid_len + 1])) {
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// got hex digit, scan another byte to uuid, increment uuid_offt
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sscanf (str + uuid_len, "%2hhx", uuid->data + uuid_offt);
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uuid_len += 2;
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uuid_offt += 1;
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if (sizeof (uuid->data) == uuid_offt)
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return uuid_len;
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}
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else {
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break;
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}
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}
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*uuid = WSREP_UUID_UNDEFINED;
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return -EINVAL;
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}
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/*!
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* Write UUID to string
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* @return length of UUID string representation or -EMSGSIZE if string is too
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* short
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*/
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int
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wsrep_uuid_print (const wsrep_uuid_t* uuid, char* str, size_t str_len)
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{
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if (str_len > 36) {
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const unsigned char* u = uuid->data;
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return snprintf(str, str_len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
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"%02x%02x-%02x%02x%02x%02x%02x%02x",
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u[ 0], u[ 1], u[ 2], u[ 3], u[ 4], u[ 5], u[ 6], u[ 7],
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u[ 8], u[ 9], u[10], u[11], u[12], u[13], u[14], u[15]);
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}
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else {
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return -EMSGSIZE;
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}
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}
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