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TIBCO Rendezvous® 8.8.0

# TibrvMsg::removeField()

Method

## Declaration

    TibrvStatus removeField(
        const char*    fieldName,
        tibrv_u16      fieldId=0);

## Purpose

Remove a field from a message.

## Remarks

Pointer data (such as strings, arrays, submessages, XML data, or opaque byte sequences) previously extracted from the field remains valid even after removing the field from the message.

Parameter | Description
`fieldName` | Remove the field with this name.
`fieldId` | Remove the field with this identifier. Zero is a special value that signifies no field identifier.

## Field Search Algorithm

This method uses this algorithm to find and remove a field within a message, as specified by a field identifier and a field name.

Procedure

| 1. | If the identifier is zero, skip to step 3.

If the program supplied a non-zero field identifier, then search for the field with that identifier. If the search succeeds, remove the field.

On failure, continue to step 2.

| 2. | If the identifier search (in step 1) fails, and the program supplied a non-`NULL` field name, then search for a field with that name.

If the program supplied `NULL` as the field name, return the status code `TIBRV_NOT_FOUND.`

If the name search fails, return the status code `TIBRV_NOT_FOUND.`

If the name search succeeds, but the actual identifier in the field is non-`NULL` (so it does not match the identifier supplied) then return the status code `TIBRV_ID_CONFLICT.`

If the search succeeds, remove the field.

| 3. | When the program supplied zero as the identifier, search for a field with the specified name—even if that name is `NULL`.

If the search succeeds, remove the field.

If the search fails, return the status code `TIBRV_NOT_FOUND.`

If a message contains several fields with the same name, searching by name removes the first instance of the field with that name.

## See Also

TibrvMsg::removeFieldInstance()

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