1 files changed, 130 insertions, 0 deletions
diff --git a/wsrep-lib/include/wsrep/gtid.hpp b/wsrep-lib/include/wsrep/gtid.hpp
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+++ b/wsrep-lib/include/wsrep/gtid.hpp
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2018 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/>.
+ */
+
+#ifndef WSREP_GTID_HPP
+#define WSREP_GTID_HPP
+
+#include "id.hpp"
+#include "seqno.hpp"
+#include "compiler.hpp"
+
+#include <iosfwd>
+
+/**
+ * Minimum number of bytes guaratneed to store GTID string representation,
+ * terminating '\0' not included (36 + 1 + 20).
+ */
+#define WSREP_LIB_GTID_C_STR_LEN 57
+
+namespace wsrep
+{
+    class gtid
+    {
+    public:
+        gtid()
+            : id_()
+            , seqno_()
+        { }
+        gtid(const wsrep::id& id, wsrep::seqno seqno)
+            : id_(id)
+            , seqno_(seqno)
+        { }
+        const wsrep::id& id() const { return id_; }
+        wsrep::seqno seqno() const { return seqno_ ; }
+        bool is_undefined() const
+        {
+            return (seqno_.is_undefined() && id_.is_undefined());
+        }
+        static const wsrep::gtid& undefined()
+        {
+            return undefined_;
+        }
+        bool operator==(const gtid& other) const
+        {
+            return (
+                seqno_ == other.seqno_ &&
+                id_ == other.id_
+            );
+        }
+    private:
+        static const wsrep::gtid undefined_;
+        wsrep::id id_;
+        wsrep::seqno seqno_;
+    };
+
+    /**
+     * Scan a GTID from C string.
+     *
+     * @param buf Buffer containing the string
+     * @param len Length of buffer
+     * @param[out] gtid Gtid to be printed to
+     *
+     * @return Number of bytes scanned, negative value on error.
+     */
+    ssize_t scan_from_c_str(const char* buf, size_t buf_len,
+                            wsrep::gtid& gtid);
+
+    /*
+     * Deprecated version of the above for backwards compatibility.
+     * Will be removed when all the superprojects have been updated.
+     */
+    static inline ssize_t gtid_scan_from_c_str(const char* buf, size_t buf_len,
+                                               wsrep::gtid& gtid)
+    {
+        return scan_from_c_str(buf, buf_len, gtid);
+    }
+
+    /**
+     * Print a GTID into character buffer.
+     *
+     * @param gtid GTID to be printed.
+     * @param buf Pointer to the beginning of the buffer
+     * @param buf_len Buffer length
+     *
+     * @return Number of characters printed or negative value for error
+     */
+    ssize_t print_to_c_str(const wsrep::gtid& gtid, char* buf, size_t buf_len);
+
+    /*
+     * Deprecated version of the above for backwards compatibility.
+     * Will be removed when all the superprojects have been updated.
+     */
+    static inline ssize_t gtid_print_to_c_str(const wsrep::gtid& gtid,
+                                              char* buf, size_t buf_len)
+    {
+        return print_to_c_str(gtid, buf, buf_len);
+    }
+
+    /**
+     * Return minimum number of chars required to store any GTID.
+     */
+    static inline size_t gtid_c_str_len() { return WSREP_LIB_GTID_C_STR_LEN; }
+
+    /**
+     * Overload for ostream operator<<.
+     */
+    std::ostream& operator<<(std::ostream&, const wsrep::gtid&);
+
+    /**
+     * Overload for istream operator>>.
+     */
+    std::istream& operator>>(std::istream&, wsrep::gtid&);
+}
+
+#endif // WSREP_GTID_HPP