Add initial config classes

include/cppkafka/topic_configuration.h

@@ -0,0 +1,31 @@
+#ifndef CPPKAFKA_TOPIC_CONFIGURATION_H
+#define CPPKAFKA_TOPIC_CONFIGURATION_H
+
+#include <memory>
+#include <string>
+#include <librdkafka/rdkafka.h>
+
+namespace cppkafka {
+
+class TopicConfiguration {
+public:
+    TopicConfiguration();
+    TopicConfiguration(const TopicConfiguration& rhs);
+    TopicConfiguration(TopicConfiguration&& rhs) noexcept = default;
+    TopicConfiguration& operator=(const TopicConfiguration& rhs);
+    TopicConfiguration& operator=(TopicConfiguration&& rhs) noexcept = default;
+
+    void set(const std::string& name, const std::string& value);
+private:
+    using HandlePtr = std::unique_ptr<rd_kafka_topic_conf_t,
+                                      decltype(&rd_kafka_topic_conf_destroy)>;
+
+    TopicConfiguration(rd_kafka_topic_conf_t* ptr);
+    static HandlePtr make_handle(rd_kafka_topic_conf_t* ptr);
+
+    HandlePtr handle_;
+};
+
+} // cppkafka
+
+#endif // CPPKAFKA_TOPIC_CONFIGURATION_H