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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 18:07:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 18:07:14 +0000
commita175314c3e5827eb193872241446f2f8f5c9d33c (patch)
treecd3d60ca99ae00829c52a6ca79150a5b6e62528b /wsrep-lib/wsrep-API/v26/wsrep_uuid.c
parentInitial commit. (diff)
downloadmariadb-10.5-a175314c3e5827eb193872241446f2f8f5c9d33c.tar.xz
mariadb-10.5-a175314c3e5827eb193872241446f2f8f5c9d33c.zip
Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'wsrep-lib/wsrep-API/v26/wsrep_uuid.c')
-rw-r--r--wsrep-lib/wsrep-API/v26/wsrep_uuid.c94
1 files changed, 94 insertions, 0 deletions
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 <info@codersihp.com>
+
+ 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 <errno.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+
+#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));
+}