Add initial config classes

include/cppkafka/configuration.h

@@ -0,0 +1,30 @@
+#ifndef CPPKAFKA_CONFIGURATION_H
+#define CPPKAFKA_CONFIGURATION_H
+
+#include <memory>
+#include <string>
+#include <librdkafka/rdkafka.h>
+
+namespace cppkafka {
+
+class Configuration {
+public:
+    Configuration();
+    Configuration(const Configuration& rhs);
+    Configuration(Configuration&& rhs) noexcept = default;
+    Configuration& operator=(const Configuration& rhs);
+    Configuration& operator=(Configuration&& rhs) noexcept = default;
+
+    void set(const std::string& name, const std::string& value);
+private:
+    using HandlePtr = std::unique_ptr<rd_kafka_conf_t, decltype(&rd_kafka_conf_destroy)>;
+
+    Configuration(rd_kafka_conf_t* ptr);
+    static HandlePtr make_handle(rd_kafka_conf_t* ptr);
+
+    HandlePtr handle_;
+};
+
+} // cppkafka
+
+#endif // CPPKAFKA_CONFIGURATION_H