+#define SR_LOG_NONE 0 /**< Output no messages at all. */
+#define SR_LOG_ERR 1 /**< Output error messages. */
+#define SR_LOG_WARN 2 /**< Output warnings. */
+#define SR_LOG_INFO 3 /**< Output informational messages. */
+#define SR_LOG_DBG 4 /**< Output debug messages. */
+#define SR_LOG_SPEW 5 /**< Output very noisy debug messages. */