Add comparison operators for CassUuid

Author: lgeorget

include/cassandra.h

@@ -11448,4 +11448,30 @@ cass_alloc_set_functions(CassMallocFunction malloc_func,
 } /* extern "C" */
 #endif
 
+#ifdef __cplusplus
+/**
+ * Compare two UUIDs for ordering
+ *
+ * This operator is useful to use CassUuid variables as std::map keys, for
+ * instance.
+ *
+ * @param uuid1 A UUID
+ * @param uuid2 Another UUID
+ * @return true if, and only if, uuid1 is numerically less or equal than uuid2
+ */
+bool operator<(const CassUuid& uuid1, const CassUuid& uuid2);
+
+/**
+ * Compare two UUIDs for equality
+ *
+ * This operator is useful to use CassUuid variables as std::map keys, for
+ * instance.
+ *
+ * @param uuid1 A UUID
+ * @param uuid2 Another UUID
+ * @return true if, and only if, uuid1 is numerically less or equal than uuid2
+ */
+bool operator==(const CassUuid& uuid1, const CassUuid& uuid2);
+#endif
+
 #endif /* __CASS_H_INCLUDED__ */

src/uuids.cpp

@@ -44,6 +44,18 @@ static uint64_t set_version(uint64_t timestamp, uint8_t version) {
   return (timestamp & 0x0FFFFFFFFFFFFFFFLL) | (static_cast<uint64_t>(version) << 60);
 }
 
+bool operator<(const CassUuid& uuid1, const CassUuid& uuid2) {
+  if (uuid1.time_and_version == uuid2.time_and_version)
+    return uuid1.clock_seq_and_node < uuid2.clock_seq_and_node;
+  else
+    return uuid1.time_and_version < uuid2.time_and_version;
+}
+
+bool operator==(const CassUuid& uuid1, const CassUuid& uuid2) {
+  return uuid1.time_and_version == uuid2.time_and_version
+    && uuid1.clock_seq_and_node == uuid2.clock_seq_and_node;
+}
+
 extern "C" {
 
 CassUuidGen* cass_uuid_gen_new() { return CassUuidGen::to(new UuidGen()); }