# Miscellaneous

### enum CassClusteringOrder

*Values:*

### enumerator CASS_CLUSTERING_ORDER_NONE

### enumerator CASS_CLUSTERING_ORDER_ASC

### enumerator CASS_CLUSTERING_ORDER_DESC

### enum CassProtocolVersion

*Values:*

### enumerator CASS_PROTOCOL_VERSION_V1

Deprecated 

### enumerator CASS_PROTOCOL_VERSION_V2

Deprecated 

### enumerator CASS_PROTOCOL_VERSION_V3

### enumerator CASS_PROTOCOL_VERSION_V4

### enumerator CASS_PROTOCOL_VERSION_V5

### enumerator CASS_PROTOCOL_VERSION_DSEV1

Only supported when using the DSE driver with DataStax Enterprise 

### enumerator CASS_PROTOCOL_VERSION_DSEV2

Only supported when using the DSE driver with DataStax Enterprise 

### enum CassHostListenerEvent

*Values:*

### enumerator CASS_HOST_LISTENER_EVENT_UP

### enumerator CASS_HOST_LISTENER_EVENT_DOWN

### enumerator CASS_HOST_LISTENER_EVENT_ADD

### enumerator CASS_HOST_LISTENER_EVENT_REMOVE

### enum CassCompressionType

*Values:*

### enumerator CASS_COMPRESSION_LZ4

### enumerator CASS_COMPRESSION_SNAPPY

### enumerator CASS_COMPRESSION_NONE

### typedef void (\*CassHostListenerCallback)([CassHostListenerEvent](#_CPPv421CassHostListenerEvent) event, const [CassInet](https://cpp-rs-driver.docs.scylladb.com/v1.0.1/api/struct.CassInet.md#_CPPv48CassInet) address, void \*data)

A callback used to indicate the host state for a node in the cluster.

#### SEE ALSO
cass_cluster_set_host_listener_callback() 

* **Param event:**
  **[in]** 
* **Param address:**
  **[in]** 
* **Param data:**
  **[in]** 

### [cass_uint32_t](https://cpp-rs-driver.docs.scylladb.com/v1.0.1/api/group.BasicTypes.md#_CPPv413cass_uint32_t) cass_date_from_epoch([cass_int64_t](https://cpp-rs-driver.docs.scylladb.com/v1.0.1/api/group.BasicTypes.md#_CPPv412cass_int64_t) epoch_secs)

Converts a unix timestamp (in seconds) to the Cassandra “date” type. The “date” type represents the number of days since the Epoch (1970-01-01) with the Epoch centered at the value 2^31.

* **Parameters:**
  **epoch_secs** – **[in]** 
* **Returns:**
  the number of days since the date -5877641-06-23 

### [cass_int64_t](https://cpp-rs-driver.docs.scylladb.com/v1.0.1/api/group.BasicTypes.md#_CPPv412cass_int64_t) cass_time_from_epoch([cass_int64_t](https://cpp-rs-driver.docs.scylladb.com/v1.0.1/api/group.BasicTypes.md#_CPPv412cass_int64_t) epoch_secs)

Converts a unix timestamp (in seconds) to the Cassandra “time” type. The “time” type represents the number of nanoseconds since midnight (range 0 to 86399999999999).

* **Parameters:**
  **epoch_secs** – **[in]** 
* **Returns:**
  nanoseconds since midnight 

### [cass_int64_t](https://cpp-rs-driver.docs.scylladb.com/v1.0.1/api/group.BasicTypes.md#_CPPv412cass_int64_t) cass_date_time_to_epoch([cass_uint32_t](https://cpp-rs-driver.docs.scylladb.com/v1.0.1/api/group.BasicTypes.md#_CPPv413cass_uint32_t) date, [cass_int64_t](https://cpp-rs-driver.docs.scylladb.com/v1.0.1/api/group.BasicTypes.md#_CPPv412cass_int64_t) time)

Combines the Cassandra “date” and “time” types to Epoch time in seconds.

* **Parameters:**
  * **date** – **[in]** 
  * **time** – **[in]** 
* **Returns:**
  Epoch time in seconds. Negative times are possible if the date occurs before the Epoch (1970-1-1).