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TIBCO Rendezvous® 8.8.0

# Custom Datatype Checklist

We recommend modeling your custom datatype implementation on our example code; see the file `examples/usertypes.c`.

To define a custom datatype, a program must do these steps:

Procedure

| 1. | Define the C representation of the new type. This representation is often a C struct.

| 2. | Assign a code number to represent the new type. The new type must be in the range `[`TIBRVMSG_USER_FIRST`,` TIBRVMSG_USER_LAST`]`. All other codes are reserved.

| 3. | Define an encoder function to transfer the new type from a field object into a message’s wire buffer. See tibrvMsgData_Encoder.

| 4. | Define a decoder function to transfer the new type from a message’s wire buffer into t field object. See tibrvMsgData_Decoder.

| 5. | Define a converter function to convert the new type to other datatypes. See tibrvMsgData_Converter.

| 6. | Register the encoder, decoder and converter functions. See tibrvMsg_SetHandlers().

| 7. | Optional: define convenience functions to add, get and update message fields with data of the new type. See Convenience Functions.

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