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-rw-r--r--wsrep-lib/src/uuid.cpp74
1 files changed, 74 insertions, 0 deletions
diff --git a/wsrep-lib/src/uuid.cpp b/wsrep-lib/src/uuid.cpp
new file mode 100644
index 00000000..9fe41779
--- /dev/null
+++ b/wsrep-lib/src/uuid.cpp
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2019 Codership Oy <info@codership.com>
+ *
+ * This file is part of wsrep-lib.
+ *
+ * Wsrep-lib 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, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Wsrep-lib 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 wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "uuid.hpp"
+
+#include <cstring>
+#include <cerrno>
+#include <cstdio>
+#include <cctype>
+
+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 static_cast<int>(uuid_len);
+ }
+ else {
+ break;
+ }
+ }
+
+ *uuid = wsrep::uuid_initializer;
+ return -EINVAL;
+}
+
+int wsrep::uuid_print (const wsrep::uuid_t* uuid, char* str, size_t str_len)
+{
+ if (str_len > WSREP_LIB_UUID_STR_LEN) {
+ 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;
+ }
+}