Add Error class

include/cppkafka/error.h

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2016, Matias Fontanini
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following disclaimer
+ *   in the documentation and/or other materials provided with the
+ *   distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef CPPKAFKA_ERROR_H
+#define CPPKAFKA_ERROR_H
+
+#include <string>
+#include <iosfwd>
+#include <librdkafka/rdkafka.h>
+#include "macros.h"
+
+namespace cppkafka {
+
+/**
+ * Abstraction for an rdkafka error
+ */
+class CPPKAFKA_API Error {
+public:
+    /**
+     * Constructs an error object
+     */
+    Error(rd_kafka_resp_err_t error);
+
+    /**
+     * Gets the error value
+     */
+    rd_kafka_resp_err_t get_error() const;
+
+    /**
+     * Gets the error string
+     */
+    std::string to_string() const;
+
+    /**
+     * Checks whether this error contains an actual error (and not RD_KAFKA_RESP_ERR_NO_ERROR)
+     */
+    explicit operator bool() const;
+
+    /**
+     * Compares this error for equality
+     */
+    bool operator==(const Error& rhs) const;
+
+    /**
+     * Compares this error for inequality
+     */
+    bool operator!=(const Error& rhs) const;
+
+    /**
+     * Writes this error's string representation into a stream
+     */
+    friend std::ostream& operator<<(std::ostream& output, const Error& rhs);
+private:
+    rd_kafka_resp_err_t error_;
+};
+
+} // cppkafka
+
+#endif // CPPKAFKA_ERROR_H