From a68fb2d8219f6bccc573009600e9f23e89226a5e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 20:04:16 +0200 Subject: Adding upstream version 1:10.6.11. Signed-off-by: Daniel Baumann --- wsrep-lib/wsrep-API/v26/wsrep_uuid.c | 94 ++++++++++++++++++++++++++++++++++++ 1 file changed, 94 insertions(+) create mode 100644 wsrep-lib/wsrep-API/v26/wsrep_uuid.c (limited to 'wsrep-lib/wsrep-API/v26/wsrep_uuid.c') diff --git a/wsrep-lib/wsrep-API/v26/wsrep_uuid.c b/wsrep-lib/wsrep-API/v26/wsrep_uuid.c new file mode 100644 index 00000000..3ac2ca91 --- /dev/null +++ b/wsrep-lib/wsrep-API/v26/wsrep_uuid.c @@ -0,0 +1,94 @@ +/* Copyright (C) 2009 Codership Oy + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/*! @file Helper functions to deal with history UUID string representations */ + +#include +#include +#include +#include + +#include "wsrep_api.h" + +/*! + * Read UUID from string + * @return length of UUID string representation or -EINVAL in case of error + */ +int +wsrep_uuid_scan (const char* str, size_t str_len, wsrep_uuid_t* uuid) +{ + unsigned int uuid_len = 0; + unsigned int uuid_offt = 0; + + while (uuid_len + 1 < str_len) { + /* We are skipping potential '-' after uuid_offt == 4, 6, 8, 10 + * which means + * (uuid_offt >> 1) == 2, 3, 4, 5, + * which in turn means + * (uuid_offt >> 1) - 2 <= 3 + * since it is always >= 0, because uuid_offt is unsigned */ + if (((uuid_offt >> 1) - 2) <= 3 && str[uuid_len] == '-') { + // skip dashes after 4th, 6th, 8th and 10th positions + uuid_len += 1; + continue; + } + + if (isxdigit(str[uuid_len]) && isxdigit(str[uuid_len + 1])) { + // got hex digit, scan another byte to uuid, increment uuid_offt + sscanf (str + uuid_len, "%2hhx", uuid->data + uuid_offt); + uuid_len += 2; + uuid_offt += 1; + if (sizeof (uuid->data) == uuid_offt) + return (int)uuid_len; + } + else { + break; + } + } + + *uuid = WSREP_UUID_UNDEFINED; + return -EINVAL; +} + +/*! + * Write UUID to string + * @return length of UUID string representation or -EMSGSIZE if string is too + * short + */ +int +wsrep_uuid_print (const wsrep_uuid_t* uuid, char* str, size_t str_len) +{ + if (str_len > 36) { + const unsigned char* u = uuid->data; + return snprintf(str, str_len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-" + "%02x%02x-%02x%02x%02x%02x%02x%02x", + u[ 0], u[ 1], u[ 2], u[ 3], u[ 4], u[ 5], u[ 6], u[ 7], + u[ 8], u[ 9], u[10], u[11], u[12], u[13], u[14], u[15]); + } + else { + return -EMSGSIZE; + } +} + +/*! + * Compare two UUIDs + * @return -1, 0, 1 if lhs is respectively smaller, equal, or greater than rhs + */ +int +wsrep_uuid_compare (const wsrep_uuid_t* lhs, const wsrep_uuid_t* rhs) +{ + return memcmp(lhs, rhs, sizeof(wsrep_uuid_t)); +} -- cgit v1.2.3