1 files changed, 79 insertions, 0 deletions
diff --git a/wsrep-lib/src/uuid.hpp b/wsrep-lib/src/uuid.hpp
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+++ b/wsrep-lib/src/uuid.hpp
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+/*
+ * 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/>.
+ */
+
+/** @file uuid.hpp
+ *
+ * Helper methods to parse and print UUIDs, intended to use
+ * internally in wsrep-lib.
+ *
+ * The implementation is copied from wsrep-API v26.
+ */
+
+#ifndef WSREP_UUID_HPP
+#define WSREP_UUID_HPP
+
+#include "wsrep/compiler.hpp"
+
+#include <cstddef>
+
+/**
+ * Length of UUID string representation, not including terminating '\0'.
+ */
+#define WSREP_LIB_UUID_STR_LEN 36
+
+namespace wsrep
+{
+    /**
+     * UUID type.
+     */
+    typedef union uuid_
+    {
+        unsigned char data[16];
+        size_t alignment;
+    } uuid_t;
+
+    static const wsrep::uuid_t uuid_initializer = {{0, }};
+
+    /**
+     * Read UUID from string.
+     *
+     * @param str String to read from
+     * @param str_len Length of string
+     * @param[out] UUID to read to
+     *
+     * @return Number of bytes read or negative error code in case
+     *         of error.
+     */
+    int uuid_scan(const char* str, size_t str_len, wsrep::uuid_t* uuid);
+
+    /**
+     * Write UUID to string. The caller must allocate at least
+     * WSREP_LIB_UUID_STR_LEN + 1 space for the output str parameter.
+     *
+     * @param uuid UUID to print
+     * @param str[out] Output buffer
+     * @param str_len Size of output buffer
+     *
+     * @return Number of chars printerd, negative error code in case of
+     *         error.
+     */
+    int uuid_print(const wsrep::uuid_t* uuid, char* str, size_t str_len);
+}
+
+#endif // WSREP_UUID_HPP