FudgeStatus FudgeCodec_decodeMsg ( FudgeMsgEnvelope * envelope, const fudge_byte * bytes, fudge_i32 numbytes )
{
FudgeStatus status;
FudgeMsgHeader header;
FudgeMsg message;
if ( ! envelope )
return FUDGE_NULL_POINTER;
/* Get the message header and use it to create the envelope and the message */
if ( ( status = FudgeHeader_decodeMsgHeader ( &header, bytes, numbytes ) ) != FUDGE_OK )
return status;
if ( numbytes < header.numbytes )
return FUDGE_OUT_OF_BYTES;
if ( ( status = FudgeMsg_create ( &message ) ) != FUDGE_OK )
return status;
if ( ( status = FudgeMsgEnvelope_create ( envelope,
header.directives,
header.schemaversion,
header.taxonomy,
message ) ) != FUDGE_OK )
goto release_message_and_fail;
/* Envelope now has a message reference */
FudgeMsg_release ( message );
/* Advance to the end of the header */
bytes += sizeof ( FudgeMsgHeader );
numbytes -= sizeof ( FudgeMsgHeader );
/* Consume fields */
if ( ( status = FudgeCodec_decodeMsgFields ( message, bytes, numbytes ) ) != FUDGE_OK )
goto release_envelope_and_fail;
return status;
release_envelope_and_fail:
FudgeMsgEnvelope_release ( *envelope );
release_message_and_fail:
FudgeMsg_release ( message );
return status;
}
// This must only be called from the thread that creates and connects the pipes. This then
// doesn't need to acquire the pipe semaphore as the object won't be modified concurrently.
// Another thread might be sending, but that's it.
FudgeMsgEnvelope CClientService::Recv (unsigned long lTimeout) {
FudgeStatus status;
FudgeMsgHeader header;
fudge_byte *ptr = (fudge_byte*)m_poPipes->PeekInput (8, lTimeout); // Fudge headers are 8-bytes long
if (!ptr) {
int ec = GetLastError ();
if (ec == ETIMEDOUT) {
LOGDEBUG (TEXT ("Timeout reading envelope header"));
} else {
LOGWARN (TEXT ("Couldn't read Fudge envelope header, error ") << ec);
}
SetLastError (ec);
return NULL;
}
if ((status = FudgeHeader_decodeMsgHeader (&header, ptr, 8)) != FUDGE_OK) {
LOGERROR (TEXT ("Couldn't decode Fudge envelope header, status ") << status);
SetLastError (EIO_READ);
return NULL;
}
ptr = (fudge_byte*)m_poPipes->PeekInput (header.numbytes, lTimeout);
if (!ptr) {
int ec = GetLastError ();
LOGWARN (TEXT ("Couldn't read full Fudge message (") << header.numbytes << TEXT (" bytes, error ") << ec);
SetLastError (ec);
return NULL;
}
FudgeMsgEnvelope env;
status = FudgeCodec_decodeMsg (&env, ptr, header.numbytes);
m_poPipes->DiscardInput (header.numbytes);
if (status == FUDGE_OK) {
return env;
} else {
LOGERROR (TEXT ("Couldn't decode Fudge message, status ") << status);
SetLastError (EIO_READ);
return NULL;
}
}
