TipcMsgFieldUpdateBinaryPtr

Name

TipcMsgFieldUpdateBinaryPtr — update the pointer of the message field returned by TipcMsgAppendBinaryPtr

Synopsis

T_BOOL TipcMsgFieldUpdateBinaryPtr(field, binary_data, array_size) 
T_IPC_MSG_FIELD field; 
T_PTR binary_data; 
T_INT4 array_size;

Arguments

field — message pointer field to update

binary_data — data for new message field

array_size — number of elements in binary_data

Return Values

TRUE if the pointer was successfully updated, FALSE otherwise.

Diagnostics

If TipcMsgFieldUpdateBinaryPtr fails, it returns FALSE and sets the global SmartSockets error number to one of:

T_ERR_FT_MISMATCH — the message type grammar did not match the fields in the message

T_ERR_READ_ONLY — the message was marked read-only. This happens if the message is a field in another message.

Description

TipcMsgFieldUpdateBinaryPtr updates the pointer of the message field returned by TipcMsgAppendBinaryPtr. The contents of the pointer are not copied. Instead, the supplied pointer is entered directly into the message field's internal data structure. The caller is responsible for making sure that the pointer remains valid for the lifetime of the message field, and for freeing it, if necessary, when the message field has been destroyed.

Examples

This example changes the pointer of the BINARY field:

T_PTR ptr1, ptr2; 
T_INT4 size1, size2; 
T_IPC_MSG_FIELD field; 
 
if (!TipcMsgAppendBinaryPtr(msg, ptr1, size1, &field)) { 
  return;  /* error */ 
} 
 
if (!TipcMsgFieldUpdateBinaryPtr(field, ptr2, size2)) { 
  return;  /* error */ 
}