+typedef enum _node_verification_t {
+ NODE_VERIFICATION_OFF = 0, /**< do not verify nodes at all */
+ NODE_VERIFICATION_ON = 1, /**< do node verification and assert on error in debug version */
+ NODE_VERIFICATION_REPORT = 2, /**< do node verification, but report to stderr only */
+ NODE_VERIFICATION_ERROR_ONLY = 3 /**< do node verification, but NEVER do assert nor report */
+} node_verification_t;
+
+/** Select verification of nodes.