Function pqTraceOutputMessage

src/interfaces/libpq/fe-trace.c:528–687

* Print the given message to the trace output stream. */

 * Print the given message to the trace output stream.
 */
void
pqTraceOutputMessage(PGconn *conn, const char *message, bool toServer)
{
	char		id;
	int			length;
	char	   *prefix = toServer ? "F" : "B";
	int			logCursor = 0;
	bool		regress;

	if ((conn->traceFlags & PQTRACE_SUPPRESS_TIMESTAMPS) == 0)
	{
		char		timestr[128];

		pqTraceFormatTimestamp(timestr, sizeof(timestr));
		fprintf(conn->Pfdebug, "%s\t", timestr);
	}
	regress = (conn->traceFlags & PQTRACE_REGRESS_MODE) != 0;

	id = message[logCursor++];

	memcpy(&length, message + logCursor, 4);
	length = (int) pg_ntoh32(length);
	logCursor += 4;

	/*
	 * In regress mode, suppress the length of ErrorResponse and
	 * NoticeResponse.  The F (file name), L (line number) and R (routine
	 * name) fields can change as server code is modified, and if their
	 * lengths differ from the originals, that would break tests.
	 */
	if (regress && !toServer && (id == 'E' || id == 'N'))
		fprintf(conn->Pfdebug, "%s\tNN\t", prefix);
	else
		fprintf(conn->Pfdebug, "%s\t%d\t", prefix, length);

	switch (id)
	{
		case '1':
			fprintf(conn->Pfdebug, "ParseComplete");
			/* No message content */
			break;
		case '2':
			fprintf(conn->Pfdebug, "BindComplete");
			/* No message content */
			break;
		case '3':
			fprintf(conn->Pfdebug, "CloseComplete");
			/* No message content */
			break;
		case 'A':				/* Notification Response */
			pqTraceOutputA(conn->Pfdebug, message, &logCursor, regress);
			break;
		case 'B':				/* Bind */
			pqTraceOutputB(conn->Pfdebug, message, &logCursor);
			break;
		case 'c':
			fprintf(conn->Pfdebug, "CopyDone");
			/* No message content */