Upgrade to 12.1

1 files changed, 0 insertions, 2204 deletions

diff --git a/libpq/fe-protocol3.c b/libpq/fe-protocol3.c
deleted file mode 100644
index a8a987a..0000000
--- a/libpq/fe-protocol3.c
+++ /dev/null
@@ -1,2204 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * fe-protocol3.c
- *	  functions that are specific to frontend/backend protocol version 3
- *
- * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- *
- * IDENTIFICATION
- *	  src/interfaces/libpq/fe-protocol3.c
- *
- *-------------------------------------------------------------------------
- */
-#include "postgres_fe.h"
-
-#include <ctype.h>
-#include <fcntl.h>
-
-#include "libpq-fe.h"
-#include "libpq-int.h"
-
-#include "mb/pg_wchar.h"
-
-#ifdef WIN32
-#include "win32.h"
-#else
-#include <unistd.h>
-#include <netinet/in.h>
-#ifdef HAVE_NETINET_TCP_H
-#include <netinet/tcp.h>
-#endif
-#include <arpa/inet.h>
-#endif
-
-
-/*
- * This macro lists the backend message types that could be "long" (more
- * than a couple of kilobytes).
- */
-#define VALID_LONG_MESSAGE_TYPE(id) \
-	((id) == 'T' || (id) == 'D' || (id) == 'd' || (id) == 'V' || \
-	 (id) == 'E' || (id) == 'N' || (id) == 'A')
-
-
-static void handleSyncLoss(PGconn *conn, char id, int msgLength);
-static int	getRowDescriptions(PGconn *conn, int msgLength);
-static int	getParamDescriptions(PGconn *conn, int msgLength);
-static int	getAnotherTuple(PGconn *conn, int msgLength);
-static int	getParameterStatus(PGconn *conn);
-static int	getNotify(PGconn *conn);
-static int	getCopyStart(PGconn *conn, ExecStatusType copytype);
-static int	getReadyForQuery(PGconn *conn);
-static void reportErrorPosition(PQExpBuffer msg, const char *query,
-					int loc, int encoding);
-static int build_startup_packet(const PGconn *conn, char *packet,
-					 const PQEnvironmentOption *options);
-
-
-/*
- * parseInput: if appropriate, parse input data from backend
- * until input is exhausted or a stopping state is reached.
- * Note that this function will NOT attempt to read more data from the backend.
- */
-void
-pqParseInput3(PGconn *conn)
-{
-	char		id;
-	int			msgLength;
-	int			avail;
-
-	/*
-	 * Loop to parse successive complete messages available in the buffer.
-	 */
-	for (;;)
-	{
-		/*
-		 * Try to read a message.  First get the type code and length. Return
-		 * if not enough data.
-		 */
-		conn->inCursor = conn->inStart;
-		if (pqGetc(&id, conn))
-			return;
-		if (pqGetInt(&msgLength, 4, conn))
-			return;
-
-		/*
-		 * Try to validate message type/length here.  A length less than 4 is
-		 * definitely broken.  Large lengths should only be believed for a few
-		 * message types.
-		 */
-		if (msgLength < 4)
-		{
-			handleSyncLoss(conn, id, msgLength);
-			return;
-		}
-		if (msgLength > 30000 && !VALID_LONG_MESSAGE_TYPE(id))
-		{
-			handleSyncLoss(conn, id, msgLength);
-			return;
-		}
-
-		/*
-		 * Can't process if message body isn't all here yet.
-		 */
-		msgLength -= 4;
-		avail = conn->inEnd - conn->inCursor;
-		if (avail < msgLength)
-		{
-			/*
-			 * Before returning, enlarge the input buffer if needed to hold
-			 * the whole message.  This is better than leaving it to
-			 * pqReadData because we can avoid multiple cycles of realloc()
-			 * when the message is large; also, we can implement a reasonable
-			 * recovery strategy if we are unable to make the buffer big
-			 * enough.
-			 */
-			if (pqCheckInBufferSpace(conn->inCursor + (size_t) msgLength,
-									 conn))
-			{
-				/*
-				 * XXX add some better recovery code... plan is to skip over
-				 * the message using its length, then report an error. For the
-				 * moment, just treat this like loss of sync (which indeed it
-				 * might be!)
-				 */
-				handleSyncLoss(conn, id, msgLength);
-			}
-			return;
-		}
-
-		/*
-		 * NOTIFY and NOTICE messages can happen in any state; always process
-		 * them right away.
-		 *
-		 * Most other messages should only be processed while in BUSY state.
-		 * (In particular, in READY state we hold off further parsing until
-		 * the application collects the current PGresult.)
-		 *
-		 * However, if the state is IDLE then we got trouble; we need to deal
-		 * with the unexpected message somehow.
-		 *
-		 * ParameterStatus ('S') messages are a special case: in IDLE state we
-		 * must process 'em (this case could happen if a new value was adopted
-		 * from config file due to SIGHUP), but otherwise we hold off until
-		 * BUSY state.
-		 */
-		if (id == 'A')
-		{
-			if (getNotify(conn))
-				return;
-		}
-		else if (id == 'N')
-		{
-			if (pqGetErrorNotice3(conn, false))
-				return;
-		}
-		else if (conn->asyncStatus != PGASYNC_BUSY)
-		{
-			/* If not IDLE state, just wait ... */
-			if (conn->asyncStatus != PGASYNC_IDLE)
-				return;
-
-			/*
-			 * Unexpected message in IDLE state; need to recover somehow.
-			 * ERROR messages are handled using the notice processor;
-			 * ParameterStatus is handled normally; anything else is just
-			 * dropped on the floor after displaying a suitable warning
-			 * notice.  (An ERROR is very possibly the backend telling us why
-			 * it is about to close the connection, so we don't want to just
-			 * discard it...)
-			 */
-			if (id == 'E')
-			{
-				if (pqGetErrorNotice3(conn, false /* treat as notice */ ))
-					return;
-			}
-			else if (id == 'S')
-			{
-				if (getParameterStatus(conn))
-					return;
-			}
-			else
-			{
-				pqInternalNotice(&conn->noticeHooks,
-						"message type 0x%02x arrived from server while idle",
-								 id);
-				/* Discard the unexpected message */
-				conn->inCursor += msgLength;
-			}
-		}
-		else
-		{
-			/*
-			 * In BUSY state, we can process everything.
-			 */
-			switch (id)
-			{
-				case 'C':		/* command complete */
-					if (pqGets(&conn->workBuffer, conn))
-						return;
-					if (conn->result == NULL)
-					{
-						conn->result = PQmakeEmptyPGresult(conn,
-														   PGRES_COMMAND_OK);
-						if (!conn->result)
-						{
-							printfPQExpBuffer(&conn->errorMessage,
-											  libpq_gettext("out of memory"));
-							pqSaveErrorResult(conn);
-						}
-					}
-					if (conn->result)
-						strlcpy(conn->result->cmdStatus, conn->workBuffer.data,
-								CMDSTATUS_LEN);
-					conn->asyncStatus = PGASYNC_READY;
-					break;
-				case 'E':		/* error return */
-					if (pqGetErrorNotice3(conn, true))
-						return;
-					conn->asyncStatus = PGASYNC_READY;
-					break;
-				case 'Z':		/* backend is ready for new query */
-					if (getReadyForQuery(conn))
-						return;
-					conn->asyncStatus = PGASYNC_IDLE;
-					break;
-				case 'I':		/* empty query */
-					if (conn->result == NULL)
-					{
-						conn->result = PQmakeEmptyPGresult(conn,
-														   PGRES_EMPTY_QUERY);
-						if (!conn->result)
-						{
-							printfPQExpBuffer(&conn->errorMessage,
-											  libpq_gettext("out of memory"));
-							pqSaveErrorResult(conn);
-						}
-					}
-					conn->asyncStatus = PGASYNC_READY;
-					break;
-				case '1':		/* Parse Complete */
-					/* If we're doing PQprepare, we're done; else ignore */
-					if (conn->queryclass == PGQUERY_PREPARE)
-					{
-						if (conn->result == NULL)
-						{
-							conn->result = PQmakeEmptyPGresult(conn,
-														   PGRES_COMMAND_OK);
-							if (!conn->result)
-							{
-								printfPQExpBuffer(&conn->errorMessage,
-											 libpq_gettext("out of memory"));
-								pqSaveErrorResult(conn);
-							}
-						}
-						conn->asyncStatus = PGASYNC_READY;
-					}
-					break;
-				case '2':		/* Bind Complete */
-				case '3':		/* Close Complete */
-					/* Nothing to do for these message types */
-					break;
-				case 'S':		/* parameter status */
-					if (getParameterStatus(conn))
-						return;
-					break;
-				case 'K':		/* secret key data from the backend */
-
-					/*
-					 * This is expected only during backend startup, but it's
-					 * just as easy to handle it as part of the main loop.
-					 * Save the data and continue processing.
-					 */
-					if (pqGetInt(&(conn->be_pid), 4, conn))
-						return;
-					if (pqGetInt(&(conn->be_key), 4, conn))
-						return;
-					break;
-				case 'T':		/* Row Description */
-					if (conn->result != NULL &&
-						conn->result->resultStatus == PGRES_FATAL_ERROR)
-					{
-						/*
-						 * We've already choked for some reason.  Just discard
-						 * the data till we get to the end of the query.
-						 */
-						conn->inCursor += msgLength;
-					}
-					else if (conn->result == NULL ||
-							 conn->queryclass == PGQUERY_DESCRIBE)
-					{
-						/* First 'T' in a query sequence */
-						if (getRowDescriptions(conn, msgLength))
-							return;
-						/* getRowDescriptions() moves inStart itself */
-						continue;
-					}
-					else
-					{
-						/*
-						 * A new 'T' message is treated as the start of
-						 * another PGresult.  (It is not clear that this is
-						 * really possible with the current backend.) We stop
-						 * parsing until the application accepts the current
-						 * result.
-						 */
-						conn->asyncStatus = PGASYNC_READY;
-						return;
-					}
-					break;
-				case 'n':		/* No Data */
-
-					/*
-					 * NoData indicates that we will not be seeing a
-					 * RowDescription message because the statement or portal
-					 * inquired about doesn't return rows.
-					 *
-					 * If we're doing a Describe, we have to pass something
-					 * back to the client, so set up a COMMAND_OK result,
-					 * instead of TUPLES_OK.  Otherwise we can just ignore
-					 * this message.
-					 */
-					if (conn->queryclass == PGQUERY_DESCRIBE)
-					{
-						if (conn->result == NULL)
-						{
-							conn->result = PQmakeEmptyPGresult(conn,
-														   PGRES_COMMAND_OK);
-							if (!conn->result)
-							{
-								printfPQExpBuffer(&conn->errorMessage,
-											 libpq_gettext("out of memory"));
-								pqSaveErrorResult(conn);
-							}
-						}
-						conn->asyncStatus = PGASYNC_READY;
-					}
-					break;
-				case 't':		/* Parameter Description */
-					if (getParamDescriptions(conn, msgLength))
-						return;
-					/* getParamDescriptions() moves inStart itself */
-					continue;
-				case 'D':		/* Data Row */
-					if (conn->result != NULL &&
-						conn->result->resultStatus == PGRES_TUPLES_OK)
-					{
-						/* Read another tuple of a normal query response */
-						if (getAnotherTuple(conn, msgLength))
-							return;
-						/* getAnotherTuple() moves inStart itself */
-						continue;
-					}
-					else if (conn->result != NULL &&
-							 conn->result->resultStatus == PGRES_FATAL_ERROR)
-					{
-						/*
-						 * We've already choked for some reason.  Just discard
-						 * tuples till we get to the end of the query.
-						 */
-						conn->inCursor += msgLength;
-					}
-					else
-					{
-						/* Set up to report error at end of query */
-						printfPQExpBuffer(&conn->errorMessage,
-										  libpq_gettext("server sent data (\"D\" message) without prior row description (\"T\" message)\n"));
-						pqSaveErrorResult(conn);
-						/* Discard the unexpected message */
-						conn->inCursor += msgLength;
-					}
-					break;
-				case 'G':		/* Start Copy In */
-					if (getCopyStart(conn, PGRES_COPY_IN))
-						return;
-					conn->asyncStatus = PGASYNC_COPY_IN;
-					break;
-				case 'H':		/* Start Copy Out */
-					if (getCopyStart(conn, PGRES_COPY_OUT))
-						return;
-					conn->asyncStatus = PGASYNC_COPY_OUT;
-					conn->copy_already_done = 0;
-					break;
-				case 'W':		/* Start Copy Both */
-					if (getCopyStart(conn, PGRES_COPY_BOTH))
-						return;
-					conn->asyncStatus = PGASYNC_COPY_BOTH;
-					conn->copy_already_done = 0;
-					break;
-				case 'd':		/* Copy Data */
-
-					/*
-					 * If we see Copy Data, just silently drop it.  This would
-					 * only occur if application exits COPY OUT mode too
-					 * early.
-					 */
-					conn->inCursor += msgLength;
-					break;
-				case 'c':		/* Copy Done */
-
-					/*
-					 * If we see Copy Done, just silently drop it.  This is
-					 * the normal case during PQendcopy.  We will keep
-					 * swallowing data, expecting to see command-complete for
-					 * the COPY command.
-					 */
-					break;
-				default:
-					printfPQExpBuffer(&conn->errorMessage,
-									  libpq_gettext(
-													"unexpected response from server; first received character was \"%c\"\n"),
-									  id);
-					/* build an error result holding the error message */
-					pqSaveErrorResult(conn);
-					/* not sure if we will see more, so go to ready state */
-					conn->asyncStatus = PGASYNC_READY;
-					/* Discard the unexpected message */
-					conn->inCursor += msgLength;
-					break;
-			}					/* switch on protocol character */
-		}
-		/* Successfully consumed this message */
-		if (conn->inCursor == conn->inStart + 5 + msgLength)
-		{
-			/* Normal case: parsing agrees with specified length */
-			conn->inStart = conn->inCursor;
-		}
-		else
-		{
-			/* Trouble --- report it */
-			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext("message contents do not agree with length in message type \"%c\"\n"),
-							  id);
-			/* build an error result holding the error message */
-			pqSaveErrorResult(conn);
-			conn->asyncStatus = PGASYNC_READY;
-			/* trust the specified message length as what to skip */
-			conn->inStart += 5 + msgLength;
-		}
-	}
-}
-
-/*
- * handleSyncLoss: clean up after loss of message-boundary sync
- *
- * There isn't really a lot we can do here except abandon the connection.
- */
-static void
-handleSyncLoss(PGconn *conn, char id, int msgLength)
-{
-	printfPQExpBuffer(&conn->errorMessage,
-					  libpq_gettext(
-	"lost synchronization with server: got message type \"%c\", length %d\n"),
-					  id, msgLength);
-	/* build an error result holding the error message */
-	pqSaveErrorResult(conn);
-	conn->asyncStatus = PGASYNC_READY;	/* drop out of GetResult wait loop */
-	/* flush input data since we're giving up on processing it */
-	pqDropConnection(conn, true);
-	conn->status = CONNECTION_BAD;		/* No more connection to backend */
-}
-
-/*
- * parseInput subroutine to read a 'T' (row descriptions) message.
- * We'll build a new PGresult structure (unless called for a Describe
- * command for a prepared statement) containing the attribute data.
- * Returns: 0 if processed message successfully, EOF to suspend parsing
- * (the latter case is not actually used currently).
- * In the former case, conn->inStart has been advanced past the message.
- */
-static int
-getRowDescriptions(PGconn *conn, int msgLength)
-{
-	PGresult   *result;
-	int			nfields;
-	const char *errmsg;
-	int			i;
-
-	/*
-	 * When doing Describe for a prepared statement, there'll already be a
-	 * PGresult created by getParamDescriptions, and we should fill data into
-	 * that.  Otherwise, create a new, empty PGresult.
-	 */
-	if (conn->queryclass == PGQUERY_DESCRIBE)
-	{
-		if (conn->result)
-			result = conn->result;
-		else
-			result = PQmakeEmptyPGresult(conn, PGRES_COMMAND_OK);
-	}
-	else
-		result = PQmakeEmptyPGresult(conn, PGRES_TUPLES_OK);
-	if (!result)
-	{
-		errmsg = NULL;			/* means "out of memory", see below */
-		goto advance_and_error;
-	}
-
-	/* parseInput already read the 'T' label and message length. */
-	/* the next two bytes are the number of fields */
-	if (pqGetInt(&(result->numAttributes), 2, conn))
-	{
-		/* We should not run out of data here, so complain */
-		errmsg = libpq_gettext("insufficient data in \"T\" message");
-		goto advance_and_error;
-	}
-	nfields = result->numAttributes;
-
-	/* allocate space for the attribute descriptors */
-	if (nfields > 0)
-	{
-		result->attDescs = (PGresAttDesc *)
-			pqResultAlloc(result, nfields * sizeof(PGresAttDesc), TRUE);
-		if (!result->attDescs)
-		{
-			errmsg = NULL;		/* means "out of memory", see below */
-			goto advance_and_error;
-		}
-		MemSet(result->attDescs, 0, nfields * sizeof(PGresAttDesc));
-	}
-
-	/* result->binary is true only if ALL columns are binary */
-	result->binary = (nfields > 0) ? 1 : 0;
-
-	/* get type info */
-	for (i = 0; i < nfields; i++)
-	{
-		int			tableid;
-		int			columnid;
-		int			typid;
-		int			typlen;
-		int			atttypmod;
-		int			format;
-
-		if (pqGets(&conn->workBuffer, conn) ||
-			pqGetInt(&tableid, 4, conn) ||
-			pqGetInt(&columnid, 2, conn) ||
-			pqGetInt(&typid, 4, conn) ||
-			pqGetInt(&typlen, 2, conn) ||
-			pqGetInt(&atttypmod, 4, conn) ||
-			pqGetInt(&format, 2, conn))
-		{
-			/* We should not run out of data here, so complain */
-			errmsg = libpq_gettext("insufficient data in \"T\" message");
-			goto advance_and_error;
-		}
-
-		/*
-		 * Since pqGetInt treats 2-byte integers as unsigned, we need to
-		 * coerce these results to signed form.
-		 */
-		columnid = (int) ((int16) columnid);
-		typlen = (int) ((int16) typlen);
-		format = (int) ((int16) format);
-
-		result->attDescs[i].name = pqResultStrdup(result,
-												  conn->workBuffer.data);
-		if (!result->attDescs[i].name)
-		{
-			errmsg = NULL;		/* means "out of memory", see below */
-			goto advance_and_error;
-		}
-		result->attDescs[i].tableid = tableid;
-		result->attDescs[i].columnid = columnid;
-		result->attDescs[i].format = format;
-		result->attDescs[i].typid = typid;
-		result->attDescs[i].typlen = typlen;
-		result->attDescs[i].atttypmod = atttypmod;
-
-		if (format != 1)
-			result->binary = 0;
-	}
-
-	/* Sanity check that we absorbed all the data */
-	if (conn->inCursor != conn->inStart + 5 + msgLength)
-	{
-		errmsg = libpq_gettext("extraneous data in \"T\" message");
-		goto advance_and_error;
-	}
-
-	/* Success! */
-	conn->result = result;
-
-	/* Advance inStart to show that the "T" message has been processed. */
-	conn->inStart = conn->inCursor;
-
-	/*
-	 * If we're doing a Describe, we're done, and ready to pass the result
-	 * back to the client.
-	 */
-	if (conn->queryclass == PGQUERY_DESCRIBE)
-	{
-		conn->asyncStatus = PGASYNC_READY;
-		return 0;
-	}
-
-	/*
-	 * We could perform additional setup for the new result set here, but for
-	 * now there's nothing else to do.
-	 */
-
-	/* And we're done. */
-	return 0;
-
-advance_and_error:
-	/* Discard unsaved result, if any */
-	if (result && result != conn->result)
-		PQclear(result);
-
-	/* Discard the failed message by pretending we read it */
-	conn->inStart += 5 + msgLength;
-
-	/*
-	 * Replace partially constructed result with an error result. First
-	 * discard the old result to try to win back some memory.
-	 */
-	pqClearAsyncResult(conn);
-
-	/*
-	 * If preceding code didn't provide an error message, assume "out of
-	 * memory" was meant.  The advantage of having this special case is that
-	 * freeing the old result first greatly improves the odds that gettext()
-	 * will succeed in providing a translation.
-	 */
-	if (!errmsg)
-		errmsg = libpq_gettext("out of memory for query result");
-
-	printfPQExpBuffer(&conn->errorMessage, "%s\n", errmsg);
-	pqSaveErrorResult(conn);
-
-	/*
-	 * Return zero to allow input parsing to continue.  Subsequent "D"
-	 * messages will be ignored until we get to end of data, since an error
-	 * result is already set up.
-	 */
-	return 0;
-}
-
-/*
- * parseInput subroutine to read a 't' (ParameterDescription) message.
- * We'll build a new PGresult structure containing the parameter data.
- * Returns: 0 if completed message, EOF if not enough data yet.
- * In the former case, conn->inStart has been advanced past the message.
- *
- * Note that if we run out of data, we have to release the partially
- * constructed PGresult, and rebuild it again next time.  Fortunately,
- * that shouldn't happen often, since 't' messages usually fit in a packet.
- */
-static int
-getParamDescriptions(PGconn *conn, int msgLength)
-{
-	PGresult   *result;
-	const char *errmsg = NULL;	/* means "out of memory", see below */
-	int			nparams;
-	int			i;
-
-	result = PQmakeEmptyPGresult(conn, PGRES_COMMAND_OK);
-	if (!result)
-		goto advance_and_error;
-
-	/* parseInput already read the 't' label and message length. */
-	/* the next two bytes are the number of parameters */
-	if (pqGetInt(&(result->numParameters), 2, conn))
-		goto not_enough_data;
-	nparams = result->numParameters;
-
-	/* allocate space for the parameter descriptors */
-	if (nparams > 0)
-	{
-		result->paramDescs = (PGresParamDesc *)
-			pqResultAlloc(result, nparams * sizeof(PGresParamDesc), TRUE);
-		if (!result->paramDescs)
-			goto advance_and_error;
-		MemSet(result->paramDescs, 0, nparams * sizeof(PGresParamDesc));
-	}
-
-	/* get parameter info */
-	for (i = 0; i < nparams; i++)
-	{
-		int			typid;
-
-		if (pqGetInt(&typid, 4, conn))
-			goto not_enough_data;
-		result->paramDescs[i].typid = typid;
-	}
-
-	/* Sanity check that we absorbed all the data */
-	if (conn->inCursor != conn->inStart + 5 + msgLength)
-	{
-		errmsg = libpq_gettext("extraneous data in \"t\" message");
-		goto advance_and_error;
-	}
-
-	/* Success! */
-	conn->result = result;
-
-	/* Advance inStart to show that the "t" message has been processed. */
-	conn->inStart = conn->inCursor;
-
-	return 0;
-
-not_enough_data:
-	PQclear(result);
-	return EOF;
-
-advance_and_error:
-	/* Discard unsaved result, if any */
-	if (result && result != conn->result)
-		PQclear(result);
-
-	/* Discard the failed message by pretending we read it */
-	conn->inStart += 5 + msgLength;
-
-	/*
-	 * Replace partially constructed result with an error result. First
-	 * discard the old result to try to win back some memory.
-	 */
-	pqClearAsyncResult(conn);
-
-	/*
-	 * If preceding code didn't provide an error message, assume "out of
-	 * memory" was meant.  The advantage of having this special case is that
-	 * freeing the old result first greatly improves the odds that gettext()
-	 * will succeed in providing a translation.
-	 */
-	if (!errmsg)
-		errmsg = libpq_gettext("out of memory");
-	printfPQExpBuffer(&conn->errorMessage, "%s\n", errmsg);
-	pqSaveErrorResult(conn);
-
-	/*
-	 * Return zero to allow input parsing to continue.  Essentially, we've
-	 * replaced the COMMAND_OK result with an error result, but since this
-	 * doesn't affect the protocol state, it's fine.
-	 */
-	return 0;
-}
-
-/*
- * parseInput subroutine to read a 'D' (row data) message.
- * We fill rowbuf with column pointers and then call the row processor.
- * Returns: 0 if processed message successfully, EOF to suspend parsing
- * (the latter case is not actually used currently).
- * In the former case, conn->inStart has been advanced past the message.
- */
-static int
-getAnotherTuple(PGconn *conn, int msgLength)
-{
-	PGresult   *result = conn->result;
-	int			nfields = result->numAttributes;
-	const char *errmsg;
-	PGdataValue *rowbuf;
-	int			tupnfields;		/* # fields from tuple */
-	int			vlen;			/* length of the current field value */
-	int			i;
-
-	/* Get the field count and make sure it's what we expect */
-	if (pqGetInt(&tupnfields, 2, conn))
-	{
-		/* We should not run out of data here, so complain */
-		errmsg = libpq_gettext("insufficient data in \"D\" message");
-		goto advance_and_error;
-	}
-
-	if (tupnfields != nfields)
-	{
-		errmsg = libpq_gettext("unexpected field count in \"D\" message");
-		goto advance_and_error;
-	}
-
-	/* Resize row buffer if needed */
-	rowbuf = conn->rowBuf;
-	if (nfields > conn->rowBufLen)
-	{
-		rowbuf = (PGdataValue *) realloc(rowbuf,
-										 nfields * sizeof(PGdataValue));
-		if (!rowbuf)
-		{
-			errmsg = NULL;		/* means "out of memory", see below */
-			goto advance_and_error;
-		}
-		conn->rowBuf = rowbuf;
-		conn->rowBufLen = nfields;
-	}
-
-	/* Scan the fields */
-	for (i = 0; i < nfields; i++)
-	{
-		/* get the value length */
-		if (pqGetInt(&vlen, 4, conn))
-		{
-			/* We should not run out of data here, so complain */
-			errmsg = libpq_gettext("insufficient data in \"D\" message");
-			goto advance_and_error;
-		}
-		rowbuf[i].len = vlen;
-
-		/*
-		 * rowbuf[i].value always points to the next address in the data
-		 * buffer even if the value is NULL.  This allows row processors to
-		 * estimate data sizes more easily.
-		 */
-		rowbuf[i].value = conn->inBuffer + conn->inCursor;
-
-		/* Skip over the data value */
-		if (vlen > 0)
-		{
-			if (pqSkipnchar(vlen, conn))
-			{
-				/* We should not run out of data here, so complain */
-				errmsg = libpq_gettext("insufficient data in \"D\" message");
-				goto advance_and_error;
-			}
-		}
-	}
-
-	/* Sanity check that we absorbed all the data */
-	if (conn->inCursor != conn->inStart + 5 + msgLength)
-	{
-		errmsg = libpq_gettext("extraneous data in \"D\" message");
-		goto advance_and_error;
-	}
-
-	/* Advance inStart to show that the "D" message has been processed. */
-	conn->inStart = conn->inCursor;
-
-	/* Process the collected row */
-	errmsg = NULL;
-	if (pqRowProcessor(conn, &errmsg))
-		return 0;				/* normal, successful exit */
-
-	goto set_error_result;		/* pqRowProcessor failed, report it */
-
-advance_and_error:
-	/* Discard the failed message by pretending we read it */
-	conn->inStart += 5 + msgLength;
-
-set_error_result:
-
-	/*
-	 * Replace partially constructed result with an error result. First
-	 * discard the old result to try to win back some memory.
-	 */
-	pqClearAsyncResult(conn);
-
-	/*
-	 * If preceding code didn't provide an error message, assume "out of
-	 * memory" was meant.  The advantage of having this special case is that
-	 * freeing the old result first greatly improves the odds that gettext()
-	 * will succeed in providing a translation.
-	 */
-	if (!errmsg)
-		errmsg = libpq_gettext("out of memory for query result");
-
-	printfPQExpBuffer(&conn->errorMessage, "%s\n", errmsg);
-	pqSaveErrorResult(conn);
-
-	/*
-	 * Return zero to allow input parsing to continue.  Subsequent "D"
-	 * messages will be ignored until we get to end of data, since an error
-	 * result is already set up.
-	 */
-	return 0;
-}
-
-
-/*
- * Attempt to read an Error or Notice response message.
- * This is possible in several places, so we break it out as a subroutine.
- * Entry: 'E' or 'N' message type and length have already been consumed.
- * Exit: returns 0 if successfully consumed message.
- *		 returns EOF if not enough data.
- */
-int
-pqGetErrorNotice3(PGconn *conn, bool isError)
-{
-	PGresult   *res = NULL;
-	bool		have_position = false;
-	PQExpBufferData workBuf;
-	char		id;
-
-	/*
-	 * Since the fields might be pretty long, we create a temporary
-	 * PQExpBuffer rather than using conn->workBuffer.  workBuffer is intended
-	 * for stuff that is expected to be short.  We shouldn't use
-	 * conn->errorMessage either, since this might be only a notice.
-	 */
-	initPQExpBuffer(&workBuf);
-
-	/*
-	 * Make a PGresult to hold the accumulated fields.  We temporarily lie
-	 * about the result status, so that PQmakeEmptyPGresult doesn't uselessly
-	 * copy conn->errorMessage.
-	 *
-	 * NB: This allocation can fail, if you run out of memory. The rest of the
-	 * function handles that gracefully, and we still try to set the error
-	 * message as the connection's error message.
-	 */
-	res = PQmakeEmptyPGresult(conn, PGRES_EMPTY_QUERY);
-	if (res)
-		res->resultStatus = isError ? PGRES_FATAL_ERROR : PGRES_NONFATAL_ERROR;
-
-	/*
-	 * Read the fields and save into res.
-	 *
-	 * While at it, save the SQLSTATE in conn->last_sqlstate, and note whether
-	 * we saw a PG_DIAG_STATEMENT_POSITION field.
-	 */
-	for (;;)
-	{
-		if (pqGetc(&id, conn))
-			goto fail;
-		if (id == '\0')
-			break;				/* terminator found */
-		if (pqGets(&workBuf, conn))
-			goto fail;
-		pqSaveMessageField(res, id, workBuf.data);
-		if (id == PG_DIAG_SQLSTATE)
-			strlcpy(conn->last_sqlstate, workBuf.data,
-					sizeof(conn->last_sqlstate));
-		else if (id == PG_DIAG_STATEMENT_POSITION)
-			have_position = true;
-	}
-
-	/*
-	 * Save the active query text, if any, into res as well; but only if we
-	 * might need it for an error cursor display, which is only true if there
-	 * is a PG_DIAG_STATEMENT_POSITION field.
-	 */
-	if (have_position && conn->last_query && res)
-		res->errQuery = pqResultStrdup(res, conn->last_query);
-
-	/*
-	 * Now build the "overall" error message for PQresultErrorMessage.
-	 */
-	resetPQExpBuffer(&workBuf);
-	pqBuildErrorMessage3(&workBuf, res, conn->verbosity, conn->show_context);
-
-	/*
-	 * Either save error as current async result, or just emit the notice.
-	 */
-	if (isError)
-	{
-		if (res)
-			res->errMsg = pqResultStrdup(res, workBuf.data);
-		pqClearAsyncResult(conn);
-		conn->result = res;
-		if (PQExpBufferDataBroken(workBuf))
-			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext("out of memory"));
-		else
-			appendPQExpBufferStr(&conn->errorMessage, workBuf.data);
-	}
-	else
-	{
-		/* if we couldn't allocate the result set, just discard the NOTICE */
-		if (res)
-		{
-			/* We can cheat a little here and not copy the message. */
-			res->errMsg = workBuf.data;
-			if (res->noticeHooks.noticeRec != NULL)
-				(*res->noticeHooks.noticeRec) (res->noticeHooks.noticeRecArg, res);
-			PQclear(res);
-		}
-	}
-
-	termPQExpBuffer(&workBuf);
-	return 0;
-
-fail:
-	PQclear(res);
-	termPQExpBuffer(&workBuf);
-	return EOF;
-}
-
-/*
- * Construct an error message from the fields in the given PGresult,
- * appending it to the contents of "msg".
- */
-void
-pqBuildErrorMessage3(PQExpBuffer msg, const PGresult *res,
-					 PGVerbosity verbosity, PGContextVisibility show_context)
-{
-	const char *val;
-	const char *querytext = NULL;
-	int			querypos = 0;
-
-	/* If we couldn't allocate a PGresult, just say "out of memory" */
-	if (res == NULL)
-	{
-		appendPQExpBuffer(msg, libpq_gettext("out of memory\n"));
-		return;
-	}
-
-	/*
-	 * If we don't have any broken-down fields, just return the base message.
-	 * This mainly applies if we're given a libpq-generated error result.
-	 */
-	if (res->errFields == NULL)
-	{
-		if (res->errMsg && res->errMsg[0])
-			appendPQExpBufferStr(msg, res->errMsg);
-		else
-			appendPQExpBuffer(msg, libpq_gettext("no error message available\n"));
-		return;
-	}
-
-	/* Else build error message from relevant fields */
-	val = PQresultErrorField(res, PG_DIAG_SEVERITY);
-	if (val)
-		appendPQExpBuffer(msg, "%s:  ", val);
-	if (verbosity == PQERRORS_VERBOSE)
-	{
-		val = PQresultErrorField(res, PG_DIAG_SQLSTATE);
-		if (val)
-			appendPQExpBuffer(msg, "%s: ", val);
-	}
-	val = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
-	if (val)
-		appendPQExpBufferStr(msg, val);
-	val = PQresultErrorField(res, PG_DIAG_STATEMENT_POSITION);
-	if (val)
-	{
-		if (verbosity != PQERRORS_TERSE && res->errQuery != NULL)
-		{
-			/* emit position as a syntax cursor display */
-			querytext = res->errQuery;
-			querypos = atoi(val);
-		}
-		else
-		{
-			/* emit position as text addition to primary message */
-			/* translator: %s represents a digit string */
-			appendPQExpBuffer(msg, libpq_gettext(" at character %s"),
-							  val);
-		}
-	}
-	else
-	{
-		val = PQresultErrorField(res, PG_DIAG_INTERNAL_POSITION);
-		if (val)
-		{
-			querytext = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY);
-			if (verbosity != PQERRORS_TERSE && querytext != NULL)
-			{
-				/* emit position as a syntax cursor display */
-				querypos = atoi(val);
-			}
-			else
-			{
-				/* emit position as text addition to primary message */
-				/* translator: %s represents a digit string */
-				appendPQExpBuffer(msg, libpq_gettext(" at character %s"),
-								  val);
-			}
-		}
-	}
-	appendPQExpBufferChar(msg, '\n');
-	if (verbosity != PQERRORS_TERSE)
-	{
-		if (querytext && querypos > 0)
-			reportErrorPosition(msg, querytext, querypos,
-								res->client_encoding);
-		val = PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL);
-		if (val)
-			appendPQExpBuffer(msg, libpq_gettext("DETAIL:  %s\n"), val);
-		val = PQresultErrorField(res, PG_DIAG_MESSAGE_HINT);
-		if (val)
-			appendPQExpBuffer(msg, libpq_gettext("HINT:  %s\n"), val);
-		val = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY);
-		if (val)
-			appendPQExpBuffer(msg, libpq_gettext("QUERY:  %s\n"), val);
-		if (show_context == PQSHOW_CONTEXT_ALWAYS ||
-			(show_context == PQSHOW_CONTEXT_ERRORS &&
-			 res->resultStatus == PGRES_FATAL_ERROR))
-		{
-			val = PQresultErrorField(res, PG_DIAG_CONTEXT);
-			if (val)
-				appendPQExpBuffer(msg, libpq_gettext("CONTEXT:  %s\n"),
-								  val);
-		}
-	}
-	if (verbosity == PQERRORS_VERBOSE)
-	{
-		val = PQresultErrorField(res, PG_DIAG_SCHEMA_NAME);
-		if (val)
-			appendPQExpBuffer(msg,
-							  libpq_gettext("SCHEMA NAME:  %s\n"), val);
-		val = PQresultErrorField(res, PG_DIAG_TABLE_NAME);
-		if (val)
-			appendPQExpBuffer(msg,
-							  libpq_gettext("TABLE NAME:  %s\n"), val);
-		val = PQresultErrorField(res, PG_DIAG_COLUMN_NAME);
-		if (val)
-			appendPQExpBuffer(msg,
-							  libpq_gettext("COLUMN NAME:  %s\n"), val);
-		val = PQresultErrorField(res, PG_DIAG_DATATYPE_NAME);
-		if (val)
-			appendPQExpBuffer(msg,
-							  libpq_gettext("DATATYPE NAME:  %s\n"), val);
-		val = PQresultErrorField(res, PG_DIAG_CONSTRAINT_NAME);
-		if (val)
-			appendPQExpBuffer(msg,
-							  libpq_gettext("CONSTRAINT NAME:  %s\n"), val);
-	}
-	if (verbosity == PQERRORS_VERBOSE)
-	{
-		const char *valf;
-		const char *vall;
-
-		valf = PQresultErrorField(res, PG_DIAG_SOURCE_FILE);
-		vall = PQresultErrorField(res, PG_DIAG_SOURCE_LINE);
-		val = PQresultErrorField(res, PG_DIAG_SOURCE_FUNCTION);
-		if (val || valf || vall)
-		{
-			appendPQExpBufferStr(msg, libpq_gettext("LOCATION:  "));
-			if (val)
-				appendPQExpBuffer(msg, libpq_gettext("%s, "), val);
-			if (valf && vall)	/* unlikely we'd have just one */
-				appendPQExpBuffer(msg, libpq_gettext("%s:%s"),
-								  valf, vall);
-			appendPQExpBufferChar(msg, '\n');
-		}
-	}
-}
-
-/*
- * Add an error-location display to the error message under construction.
- *
- * The cursor location is measured in logical characters; the query string
- * is presumed to be in the specified encoding.
- */
-static void
-reportErrorPosition(PQExpBuffer msg, const char *query, int loc, int encoding)
-{
-#define DISPLAY_SIZE	60		/* screen width limit, in screen cols */
-#define MIN_RIGHT_CUT	10		/* try to keep this far away from EOL */
-
-	char	   *wquery;
-	int			slen,
-				cno,
-				i,
-			   *qidx,
-			   *scridx,
-				qoffset,
-				scroffset,
-				ibeg,
-				iend,
-				loc_line;
-	bool		mb_encoding,
-				beg_trunc,
-				end_trunc;
-
-	/* Convert loc from 1-based to 0-based; no-op if out of range */
-	loc--;
-	if (loc < 0)
-		return;
-
-	/* Need a writable copy of the query */
-	wquery = strdup(query);
-	if (wquery == NULL)
-		return;					/* fail silently if out of memory */
-
-	/*
-	 * Each character might occupy multiple physical bytes in the string, and
-	 * in some Far Eastern character sets it might take more than one screen
-	 * column as well.  We compute the starting byte offset and starting
-	 * screen column of each logical character, and store these in qidx[] and
-	 * scridx[] respectively.
-	 */
-
-	/* we need a safe allocation size... */
-	slen = strlen(wquery) + 1;
-
-	qidx = (int *) malloc(slen * sizeof(int));
-	if (qidx == NULL)
-	{
-		free(wquery);
-		return;
-	}
-	scridx = (int *) malloc(slen * sizeof(int));
-	if (scridx == NULL)
-	{
-		free(qidx);
-		free(wquery);
-		return;
-	}
-
-	/* We can optimize a bit if it's a single-byte encoding */
-	mb_encoding = (pg_encoding_max_length(encoding) != 1);
-
-	/*
-	 * Within the scanning loop, cno is the current character's logical
-	 * number, qoffset is its offset in wquery, and scroffset is its starting
-	 * logical screen column (all indexed from 0).  "loc" is the logical
-	 * character number of the error location.  We scan to determine loc_line
-	 * (the 1-based line number containing loc) and ibeg/iend (first character
-	 * number and last+1 character number of the line containing loc). Note
-	 * that qidx[] and scridx[] are filled only as far as iend.
-	 */
-	qoffset = 0;
-	scroffset = 0;
-	loc_line = 1;
-	ibeg = 0;
-	iend = -1;					/* -1 means not set yet */
-
-	for (cno = 0; wquery[qoffset] != '\0'; cno++)
-	{
-		char		ch = wquery[qoffset];
-
-		qidx[cno] = qoffset;
-		scridx[cno] = scroffset;
-
-		/*
-		 * Replace tabs with spaces in the writable copy.  (Later we might
-		 * want to think about coping with their variable screen width, but
-		 * not today.)
-		 */
-		if (ch == '\t')
-			wquery[qoffset] = ' ';
-
-		/*
-		 * If end-of-line, count lines and mark positions. Each \r or \n
-		 * counts as a line except when \r \n appear together.
-		 */
-		else if (ch == '\r' || ch == '\n')
-		{
-			if (cno < loc)
-			{
-				if (ch == '\r' ||
-					cno == 0 ||
-					wquery[qidx[cno - 1]] != '\r')
-					loc_line++;
-				/* extract beginning = last line start before loc. */
-				ibeg = cno + 1;
-			}
-			else
-			{
-				/* set extract end. */
-				iend = cno;
-				/* done scanning. */
-				break;
-			}
-		}
-
-		/* Advance */
-		if (mb_encoding)
-		{
-			int			w;
-
-			w = pg_encoding_dsplen(encoding, &wquery[qoffset]);
-			/* treat any non-tab control chars as width 1 */
-			if (w <= 0)
-				w = 1;
-			scroffset += w;
-			qoffset += pg_encoding_mblen(encoding, &wquery[qoffset]);
-		}
-		else
-		{
-			/* We assume wide chars only exist in multibyte encodings */
-			scroffset++;
-			qoffset++;
-		}
-	}
-	/* Fix up if we didn't find an end-of-line after loc */
-	if (iend < 0)
-	{
-		iend = cno;				/* query length in chars, +1 */
-		qidx[iend] = qoffset;
-		scridx[iend] = scroffset;
-	}
-
-	/* Print only if loc is within computed query length */
-	if (loc <= cno)
-	{
-		/* If the line extracted is too long, we truncate it. */
-		beg_trunc = false;
-		end_trunc = false;
-		if (scridx[iend] - scridx[ibeg] > DISPLAY_SIZE)
-		{
-			/*
-			 * We first truncate right if it is enough.  This code might be
-			 * off a space or so on enforcing MIN_RIGHT_CUT if there's a wide
-			 * character right there, but that should be okay.
-			 */
-			if (scridx[ibeg] + DISPLAY_SIZE >= scridx[loc] + MIN_RIGHT_CUT)
-			{
-				while (scridx[iend] - scridx[ibeg] > DISPLAY_SIZE)
-					iend--;
-				end_trunc = true;
-			}
-			else
-			{
-				/* Truncate right if not too close to loc. */
-				while (scridx[loc] + MIN_RIGHT_CUT < scridx[iend])
-				{
-					iend--;
-					end_trunc = true;
-				}
-
-				/* Truncate left if still too long. */
-				while (scridx[iend] - scridx[ibeg] > DISPLAY_SIZE)
-				{
-					ibeg++;
-					beg_trunc = true;
-				}
-			}
-		}
-
-		/* truncate working copy at desired endpoint */
-		wquery[qidx[iend]] = '\0';
-
-		/* Begin building the finished message. */
-		i = msg->len;
-		appendPQExpBuffer(msg, libpq_gettext("LINE %d: "), loc_line);
-		if (beg_trunc)
-			appendPQExpBufferStr(msg, "...");
-
-		/*
-		 * While we have the prefix in the msg buffer, compute its screen
-		 * width.
-		 */
-		scroffset = 0;
-		for (; i < msg->len; i += pg_encoding_mblen(encoding, &msg->data[i]))
-		{
-			int			w = pg_encoding_dsplen(encoding, &msg->data[i]);
-
-			if (w <= 0)
-				w = 1;
-			scroffset += w;
-		}
-
-		/* Finish up the LINE message line. */
-		appendPQExpBufferStr(msg, &wquery[qidx[ibeg]]);
-		if (end_trunc)
-			appendPQExpBufferStr(msg, "...");
-		appendPQExpBufferChar(msg, '\n');
-
-		/* Now emit the cursor marker line. */
-		scroffset += scridx[loc] - scridx[ibeg];
-		for (i = 0; i < scroffset; i++)
-			appendPQExpBufferChar(msg, ' ');
-		appendPQExpBufferChar(msg, '^');
-		appendPQExpBufferChar(msg, '\n');
-	}
-
-	/* Clean up. */
-	free(scridx);
-	free(qidx);
-	free(wquery);
-}
-
-
-/*
- * Attempt to read a ParameterStatus message.
- * This is possible in several places, so we break it out as a subroutine.
- * Entry: 'S' message type and length have already been consumed.
- * Exit: returns 0 if successfully consumed message.
- *		 returns EOF if not enough data.
- */
-static int
-getParameterStatus(PGconn *conn)
-{
-	PQExpBufferData valueBuf;
-
-	/* Get the parameter name */
-	if (pqGets(&conn->workBuffer, conn))
-		return EOF;
-	/* Get the parameter value (could be large) */
-	initPQExpBuffer(&valueBuf);
-	if (pqGets(&valueBuf, conn))
-	{
-		termPQExpBuffer(&valueBuf);
-		return EOF;
-	}
-	/* And save it */
-	pqSaveParameterStatus(conn, conn->workBuffer.data, valueBuf.data);
-	termPQExpBuffer(&valueBuf);
-	return 0;
-}
-
-
-/*
- * Attempt to read a Notify response message.
- * This is possible in several places, so we break it out as a subroutine.
- * Entry: 'A' message type and length have already been consumed.
- * Exit: returns 0 if successfully consumed Notify message.
- *		 returns EOF if not enough data.
- */
-static int
-getNotify(PGconn *conn)
-{
-	int			be_pid;
-	char	   *svname;
-	int			nmlen;
-	int			extralen;
-	PGnotify   *newNotify;
-
-	if (pqGetInt(&be_pid, 4, conn))
-		return EOF;
-	if (pqGets(&conn->workBuffer, conn))
-		return EOF;
-	/* must save name while getting extra string */
-	svname = strdup(conn->workBuffer.data);
-	if (!svname)
-		return EOF;
-	if (pqGets(&conn->workBuffer, conn))
-	{
-		free(svname);
-		return EOF;
-	}
-
-	/*
-	 * Store the strings right after the PQnotify structure so it can all be
-	 * freed at once.  We don't use NAMEDATALEN because we don't want to tie
-	 * this interface to a specific server name length.
-	 */
-	nmlen = strlen(svname);
-	extralen = strlen(conn->workBuffer.data);
-	newNotify = (PGnotify *) malloc(sizeof(PGnotify) + nmlen + extralen + 2);
-	if (newNotify)
-	{
-		newNotify->relname = (char *) newNotify + sizeof(PGnotify);
-		strcpy(newNotify->relname, svname);
-		newNotify->extra = newNotify->relname + nmlen + 1;
-		strcpy(newNotify->extra, conn->workBuffer.data);
-		newNotify->be_pid = be_pid;
-		newNotify->next = NULL;
-		if (conn->notifyTail)
-			conn->notifyTail->next = newNotify;
-		else
-			conn->notifyHead = newNotify;
-		conn->notifyTail = newNotify;
-	}
-
-	free(svname);
-	return 0;
-}
-
-/*
- * getCopyStart - process CopyInResponse, CopyOutResponse or
- * CopyBothResponse message
- *
- * parseInput already read the message type and length.
- */
-static int
-getCopyStart(PGconn *conn, ExecStatusType copytype)
-{
-	PGresult   *result;
-	int			nfields;
-	int			i;
-
-	result = PQmakeEmptyPGresult(conn, copytype);
-	if (!result)
-		goto failure;
-
-	if (pqGetc(&conn->copy_is_binary, conn))
-		goto failure;
-	result->binary = conn->copy_is_binary;
-	/* the next two bytes are the number of fields	*/
-	if (pqGetInt(&(result->numAttributes), 2, conn))
-		goto failure;
-	nfields = result->numAttributes;
-
-	/* allocate space for the attribute descriptors */
-	if (nfields > 0)
-	{
-		result->attDescs = (PGresAttDesc *)
-			pqResultAlloc(result, nfields * sizeof(PGresAttDesc), TRUE);
-		if (!result->attDescs)
-			goto failure;
-		MemSet(result->attDescs, 0, nfields * sizeof(PGresAttDesc));
-	}
-
-	for (i = 0; i < nfields; i++)
-	{
-		int			format;
-
-		if (pqGetInt(&format, 2, conn))
-			goto failure;
-
-		/*
-		 * Since pqGetInt treats 2-byte integers as unsigned, we need to
-		 * coerce these results to signed form.
-		 */
-		format = (int) ((int16) format);
-		result->attDescs[i].format = format;
-	}
-
-	/* Success! */
-	conn->result = result;
-	return 0;
-
-failure:
-	PQclear(result);
-	return EOF;
-}
-
-/*
- * getReadyForQuery - process ReadyForQuery message
- */
-static int
-getReadyForQuery(PGconn *conn)
-{
-	char		xact_status;
-
-	if (pqGetc(&xact_status, conn))
-		return EOF;
-	switch (xact_status)
-	{
-		case 'I':
-			conn->xactStatus = PQTRANS_IDLE;
-			break;
-		case 'T':
-			conn->xactStatus = PQTRANS_INTRANS;
-			break;
-		case 'E':
-			conn->xactStatus = PQTRANS_INERROR;
-			break;
-		default:
-			conn->xactStatus = PQTRANS_UNKNOWN;
-			break;
-	}
-
-	return 0;
-}
-
-/*
- * getCopyDataMessage - fetch next CopyData message, process async messages
- *
- * Returns length word of CopyData message (> 0), or 0 if no complete
- * message available, -1 if end of copy, -2 if error.
- */
-static int
-getCopyDataMessage(PGconn *conn)
-{
-	char		id;
-	int			msgLength;
-	int			avail;
-
-	for (;;)
-	{
-		/*
-		 * Do we have the next input message?  To make life simpler for async
-		 * callers, we keep returning 0 until the next message is fully
-		 * available, even if it is not Copy Data.
-		 */
-		conn->inCursor = conn->inStart;
-		if (pqGetc(&id, conn))
-			return 0;
-		if (pqGetInt(&msgLength, 4, conn))
-			return 0;
-		if (msgLength < 4)
-		{
-			handleSyncLoss(conn, id, msgLength);
-			return -2;
-		}
-		avail = conn->inEnd - conn->inCursor;
-		if (avail < msgLength - 4)
-		{
-			/*
-			 * Before returning, enlarge the input buffer if needed to hold
-			 * the whole message.  See notes in parseInput.
-			 */
-			if (pqCheckInBufferSpace(conn->inCursor + (size_t) msgLength - 4,
-									 conn))
-			{
-				/*
-				 * XXX add some better recovery code... plan is to skip over
-				 * the message using its length, then report an error. For the
-				 * moment, just treat this like loss of sync (which indeed it
-				 * might be!)
-				 */
-				handleSyncLoss(conn, id, msgLength);
-				return -2;
-			}
-			return 0;
-		}
-
-		/*
-		 * If it's a legitimate async message type, process it.  (NOTIFY
-		 * messages are not currently possible here, but we handle them for
-		 * completeness.)  Otherwise, if it's anything except Copy Data,
-		 * report end-of-copy.
-		 */
-		switch (id)
-		{
-			case 'A':			/* NOTIFY */
-				if (getNotify(conn))
-					return 0;
-				break;
-			case 'N':			/* NOTICE */
-				if (pqGetErrorNotice3(conn, false))
-					return 0;
-				break;
-			case 'S':			/* ParameterStatus */
-				if (getParameterStatus(conn))
-					return 0;
-				break;
-			case 'd':			/* Copy Data, pass it back to caller */
-				return msgLength;
-			case 'c':
-
-				/*
-				 * If this is a CopyDone message, exit COPY_OUT mode and let
-				 * caller read status with PQgetResult().  If we're in
-				 * COPY_BOTH mode, return to COPY_IN mode.
-				 */
-				if (conn->asyncStatus == PGASYNC_COPY_BOTH)
-					conn->asyncStatus = PGASYNC_COPY_IN;
-				else
-					conn->asyncStatus = PGASYNC_BUSY;
-				return -1;
-			default:			/* treat as end of copy */
-
-				/*
-				 * Any other message terminates either COPY_IN or COPY_BOTH
-				 * mode.
-				 */
-				conn->asyncStatus = PGASYNC_BUSY;
-				return -1;
-		}
-
-		/* Drop the processed message and loop around for another */
-		conn->inStart = conn->inCursor;
-	}
-}
-
-/*
- * PQgetCopyData - read a row of data from the backend during COPY OUT
- * or COPY BOTH
- *
- * If successful, sets *buffer to point to a malloc'd row of data, and
- * returns row length (always > 0) as result.
- * Returns 0 if no row available yet (only possible if async is true),
- * -1 if end of copy (consult PQgetResult), or -2 if error (consult
- * PQerrorMessage).
- */
-int
-pqGetCopyData3(PGconn *conn, char **buffer, int async)
-{
-	int			msgLength;
-
-	for (;;)
-	{
-		/*
-		 * Collect the next input message.  To make life simpler for async
-		 * callers, we keep returning 0 until the next message is fully
-		 * available, even if it is not Copy Data.
-		 */
-		msgLength = getCopyDataMessage(conn);
-		if (msgLength < 0)
-			return msgLength;	/* end-of-copy or error */
-		if (msgLength == 0)
-		{
-			/* Don't block if async read requested */
-			if (async)
-				return 0;
-			/* Need to load more data */
-			if (pqWait(TRUE, FALSE, conn) ||
-				pqReadData(conn) < 0)
-				return -2;
-			continue;
-		}
-
-		/*
-		 * Drop zero-length messages (shouldn't happen anyway).  Otherwise
-		 * pass the data back to the caller.
-		 */
-		msgLength -= 4;
-		if (msgLength > 0)
-		{
-			*buffer = (char *) malloc(msgLength + 1);
-			if (*buffer == NULL)
-			{
-				printfPQExpBuffer(&conn->errorMessage,
-								  libpq_gettext("out of memory\n"));
-				return -2;
-			}
-			memcpy(*buffer, &conn->inBuffer[conn->inCursor], msgLength);
-			(*buffer)[msgLength] = '\0';		/* Add terminating null */
-
-			/* Mark message consumed */
-			conn->inStart = conn->inCursor + msgLength;
-
-			return msgLength;
-		}
-
-		/* Empty, so drop it and loop around for another */
-		conn->inStart = conn->inCursor;
-	}
-}
-
-/*
- * PQgetline - gets a newline-terminated string from the backend.
- *
- * See fe-exec.c for documentation.
- */
-int
-pqGetline3(PGconn *conn, char *s, int maxlen)
-{
-	int			status;
-
-	if (conn->sock == PGINVALID_SOCKET ||
-		(conn->asyncStatus != PGASYNC_COPY_OUT &&
-		 conn->asyncStatus != PGASYNC_COPY_BOTH) ||
-		conn->copy_is_binary)
-	{
-		printfPQExpBuffer(&conn->errorMessage,
-					  libpq_gettext("PQgetline: not doing text COPY OUT\n"));
-		*s = '\0';
-		return EOF;
-	}
-
-	while ((status = PQgetlineAsync(conn, s, maxlen - 1)) == 0)
-	{
-		/* need to load more data */
-		if (pqWait(TRUE, FALSE, conn) ||
-			pqReadData(conn) < 0)
-		{
-			*s = '\0';
-			return EOF;
-		}
-	}
-
-	if (status < 0)
-	{
-		/* End of copy detected; gin up old-style terminator */
-		strcpy(s, "\\.");
-		return 0;
-	}
-
-	/* Add null terminator, and strip trailing \n if present */
-	if (s[status - 1] == '\n')
-	{
-		s[status - 1] = '\0';
-		return 0;
-	}
-	else
-	{
-		s[status] = '\0';
-		return 1;
-	}
-}
-
-/*
- * PQgetlineAsync - gets a COPY data row without blocking.
- *
- * See fe-exec.c for documentation.
- */
-int
-pqGetlineAsync3(PGconn *conn, char *buffer, int bufsize)
-{
-	int			msgLength;
-	int			avail;
-
-	if (conn->asyncStatus != PGASYNC_COPY_OUT
-		&& conn->asyncStatus != PGASYNC_COPY_BOTH)
-		return -1;				/* we are not doing a copy... */
-
-	/*
-	 * Recognize the next input message.  To make life simpler for async
-	 * callers, we keep returning 0 until the next message is fully available
-	 * even if it is not Copy Data.  This should keep PQendcopy from blocking.
-	 * (Note: unlike pqGetCopyData3, we do not change asyncStatus here.)
-	 */
-	msgLength = getCopyDataMessage(conn);
-	if (msgLength < 0)
-		return -1;				/* end-of-copy or error */
-	if (msgLength == 0)
-		return 0;				/* no data yet */
-
-	/*
-	 * Move data from libpq's buffer to the caller's.  In the case where a
-	 * prior call found the caller's buffer too small, we use
-	 * conn->copy_already_done to remember how much of the row was already
-	 * returned to the caller.
-	 */
-	conn->inCursor += conn->copy_already_done;
-	avail = msgLength - 4 - conn->copy_already_done;
-	if (avail <= bufsize)
-	{
-		/* Able to consume the whole message */
-		memcpy(buffer, &conn->inBuffer[conn->inCursor], avail);
-		/* Mark message consumed */
-		conn->inStart = conn->inCursor + avail;
-		/* Reset state for next time */
-		conn->copy_already_done = 0;
-		return avail;
-	}
-	else
-	{
-		/* We must return a partial message */
-		memcpy(buffer, &conn->inBuffer[conn->inCursor], bufsize);
-		/* The message is NOT consumed from libpq's buffer */
-		conn->copy_already_done += bufsize;
-		return bufsize;
-	}
-}
-
-/*
- * PQendcopy
- *
- * See fe-exec.c for documentation.
- */
-int
-pqEndcopy3(PGconn *conn)
-{
-	PGresult   *result;
-
-	if (conn->asyncStatus != PGASYNC_COPY_IN &&
-		conn->asyncStatus != PGASYNC_COPY_OUT &&
-		conn->asyncStatus != PGASYNC_COPY_BOTH)
-	{
-		printfPQExpBuffer(&conn->errorMessage,
-						  libpq_gettext("no COPY in progress\n"));
-		return 1;
-	}
-
-	/* Send the CopyDone message if needed */
-	if (conn->asyncStatus == PGASYNC_COPY_IN ||
-		conn->asyncStatus == PGASYNC_COPY_BOTH)
-	{
-		if (pqPutMsgStart('c', false, conn) < 0 ||
-			pqPutMsgEnd(conn) < 0)
-			return 1;
-
-		/*
-		 * If we sent the COPY command in extended-query mode, we must issue a
-		 * Sync as well.
-		 */
-		if (conn->queryclass != PGQUERY_SIMPLE)
-		{
-			if (pqPutMsgStart('S', false, conn) < 0 ||
-				pqPutMsgEnd(conn) < 0)
-				return 1;
-		}
-	}
-
-	/*
-	 * make sure no data is waiting to be sent, abort if we are non-blocking
-	 * and the flush fails
-	 */
-	if (pqFlush(conn) && pqIsnonblocking(conn))
-		return 1;
-
-	/* Return to active duty */
-	conn->asyncStatus = PGASYNC_BUSY;
-	resetPQExpBuffer(&conn->errorMessage);
-
-	/*
-	 * Non blocking connections may have to abort at this point.  If everyone
-	 * played the game there should be no problem, but in error scenarios the
-	 * expected messages may not have arrived yet.  (We are assuming that the
-	 * backend's packetizing will ensure that CommandComplete arrives along
-	 * with the CopyDone; are there corner cases where that doesn't happen?)
-	 */
-	if (pqIsnonblocking(conn) && PQisBusy(conn))
-		return 1;
-
-	/* Wait for the completion response */
-	result = PQgetResult(conn);
-
-	/* Expecting a successful result */
-	if (result && result->resultStatus == PGRES_COMMAND_OK)
-	{
-		PQclear(result);
-		return 0;
-	}
-
-	/*
-	 * Trouble. For backwards-compatibility reasons, we issue the error
-	 * message as if it were a notice (would be nice to get rid of this
-	 * silliness, but too many apps probably don't handle errors from
-	 * PQendcopy reasonably).  Note that the app can still obtain the error
-	 * status from the PGconn object.
-	 */
-	if (conn->errorMessage.len > 0)
-	{
-		/* We have to strip the trailing newline ... pain in neck... */
-		char		svLast = conn->errorMessage.data[conn->errorMessage.len - 1];
-
-		if (svLast == '\n')
-			conn->errorMessage.data[conn->errorMessage.len - 1] = '\0';
-		pqInternalNotice(&conn->noticeHooks, "%s", conn->errorMessage.data);
-		conn->errorMessage.data[conn->errorMessage.len - 1] = svLast;
-	}
-
-	PQclear(result);
-
-	return 1;
-}
-
-
-/*
- * PQfn - Send a function call to the POSTGRES backend.
- *
- * See fe-exec.c for documentation.
- */
-PGresult *
-pqFunctionCall3(PGconn *conn, Oid fnid,
-				int *result_buf, int *actual_result_len,
-				int result_is_int,
-				const PQArgBlock *args, int nargs)
-{
-	bool		needInput = false;
-	ExecStatusType status = PGRES_FATAL_ERROR;
-	char		id;
-	int			msgLength;
-	int			avail;
-	int			i;
-
-	/* PQfn already validated connection state */
-
-	if (pqPutMsgStart('F', false, conn) < 0 ||	/* function call msg */
-		pqPutInt(fnid, 4, conn) < 0 ||	/* function id */
-		pqPutInt(1, 2, conn) < 0 ||		/* # of format codes */
-		pqPutInt(1, 2, conn) < 0 ||		/* format code: BINARY */
-		pqPutInt(nargs, 2, conn) < 0)	/* # of args */
-	{
-		pqHandleSendFailure(conn);
-		return NULL;
-	}
-
-	for (i = 0; i < nargs; ++i)
-	{							/* len.int4 + contents	   */
-		if (pqPutInt(args[i].len, 4, conn))
-		{
-			pqHandleSendFailure(conn);
-			return NULL;
-		}
-		if (args[i].len == -1)
-			continue;			/* it's NULL */
-
-		if (args[i].isint)
-		{
-			if (pqPutInt(args[i].u.integer, args[i].len, conn))
-			{
-				pqHandleSendFailure(conn);
-				return NULL;
-			}
-		}
-		else
-		{
-			if (pqPutnchar((char *) args[i].u.ptr, args[i].len, conn))
-			{
-				pqHandleSendFailure(conn);
-				return NULL;
-			}
-		}
-	}
-
-	if (pqPutInt(1, 2, conn) < 0)		/* result format code: BINARY */
-	{
-		pqHandleSendFailure(conn);
-		return NULL;
-	}
-
-	if (pqPutMsgEnd(conn) < 0 ||
-		pqFlush(conn))
-	{
-		pqHandleSendFailure(conn);
-		return NULL;
-	}
-
-	for (;;)
-	{
-		if (needInput)
-		{
-			/* Wait for some data to arrive (or for the channel to close) */
-			if (pqWait(TRUE, FALSE, conn) ||
-				pqReadData(conn) < 0)
-				break;
-		}
-
-		/*
-		 * Scan the message. If we run out of data, loop around to try again.
-		 */
-		needInput = true;
-
-		conn->inCursor = conn->inStart;
-		if (pqGetc(&id, conn))
-			continue;
-		if (pqGetInt(&msgLength, 4, conn))
-			continue;
-
-		/*
-		 * Try to validate message type/length here.  A length less than 4 is
-		 * definitely broken.  Large lengths should only be believed for a few
-		 * message types.
-		 */
-		if (msgLength < 4)
-		{
-			handleSyncLoss(conn, id, msgLength);
-			break;
-		}
-		if (msgLength > 30000 && !VALID_LONG_MESSAGE_TYPE(id))
-		{
-			handleSyncLoss(conn, id, msgLength);
-			break;
-		}
-
-		/*
-		 * Can't process if message body isn't all here yet.
-		 */
-		msgLength -= 4;
-		avail = conn->inEnd - conn->inCursor;
-		if (avail < msgLength)
-		{
-			/*
-			 * Before looping, enlarge the input buffer if needed to hold the
-			 * whole message.  See notes in parseInput.
-			 */
-			if (pqCheckInBufferSpace(conn->inCursor + (size_t) msgLength,
-									 conn))
-			{
-				/*
-				 * XXX add some better recovery code... plan is to skip over
-				 * the message using its length, then report an error. For the
-				 * moment, just treat this like loss of sync (which indeed it
-				 * might be!)
-				 */
-				handleSyncLoss(conn, id, msgLength);
-				break;
-			}
-			continue;
-		}
-
-		/*
-		 * We should see V or E response to the command, but might get N
-		 * and/or A notices first. We also need to swallow the final Z before
-		 * returning.
-		 */
-		switch (id)
-		{
-			case 'V':			/* function result */
-				if (pqGetInt(actual_result_len, 4, conn))
-					continue;
-				if (*actual_result_len != -1)
-				{
-					if (result_is_int)
-					{
-						if (pqGetInt(result_buf, *actual_result_len, conn))
-							continue;
-					}
-					else
-					{
-						if (pqGetnchar((char *) result_buf,
-									   *actual_result_len,
-									   conn))
-							continue;
-					}
-				}
-				/* correctly finished function result message */
-				status = PGRES_COMMAND_OK;
-				break;
-			case 'E':			/* error return */
-				if (pqGetErrorNotice3(conn, true))
-					continue;
-				status = PGRES_FATAL_ERROR;
-				break;
-			case 'A':			/* notify message */
-				/* handle notify and go back to processing return values */
-				if (getNotify(conn))
-					continue;
-				break;
-			case 'N':			/* notice */
-				/* handle notice and go back to processing return values */
-				if (pqGetErrorNotice3(conn, false))
-					continue;
-				break;
-			case 'Z':			/* backend is ready for new query */
-				if (getReadyForQuery(conn))
-					continue;
-				/* consume the message and exit */
-				conn->inStart += 5 + msgLength;
-				/* if we saved a result object (probably an error), use it */
-				if (conn->result)
-					return pqPrepareAsyncResult(conn);
-				return PQmakeEmptyPGresult(conn, status);
-			case 'S':			/* parameter status */
-				if (getParameterStatus(conn))
-					continue;
-				break;
-			default:
-				/* The backend violates the protocol. */
-				printfPQExpBuffer(&conn->errorMessage,
-								  libpq_gettext("protocol error: id=0x%x\n"),
-								  id);
-				pqSaveErrorResult(conn);
-				/* trust the specified message length as what to skip */
-				conn->inStart += 5 + msgLength;
-				return pqPrepareAsyncResult(conn);
-		}
-		/* Completed this message, keep going */
-		/* trust the specified message length as what to skip */
-		conn->inStart += 5 + msgLength;
-		needInput = false;
-	}
-
-	/*
-	 * We fall out of the loop only upon failing to read data.
-	 * conn->errorMessage has been set by pqWait or pqReadData. We want to
-	 * append it to any already-received error message.
-	 */
-	pqSaveErrorResult(conn);
-	return pqPrepareAsyncResult(conn);
-}
-
-
-/*
- * Construct startup packet
- *
- * Returns a malloc'd packet buffer, or NULL if out of memory
- */
-char *
-pqBuildStartupPacket3(PGconn *conn, int *packetlen,
-					  const PQEnvironmentOption *options)
-{
-	char	   *startpacket;
-
-	*packetlen = build_startup_packet(conn, NULL, options);
-	startpacket = (char *) malloc(*packetlen);
-	if (!startpacket)
-		return NULL;
-	*packetlen = build_startup_packet(conn, startpacket, options);
-	return startpacket;
-}
-
-/*
- * Build a startup packet given a filled-in PGconn structure.
- *
- * We need to figure out how much space is needed, then fill it in.
- * To avoid duplicate logic, this routine is called twice: the first time
- * (with packet == NULL) just counts the space needed, the second time
- * (with packet == allocated space) fills it in.  Return value is the number
- * of bytes used.
- */
-static int
-build_startup_packet(const PGconn *conn, char *packet,
-					 const PQEnvironmentOption *options)
-{
-	int			packet_len = 0;
-	const PQEnvironmentOption *next_eo;
-	const char *val;
-
-	/* Protocol version comes first. */
-	if (packet)
-	{
-		ProtocolVersion pv = htonl(conn->pversion);
-
-		memcpy(packet + packet_len, &pv, sizeof(ProtocolVersion));
-	}
-	packet_len += sizeof(ProtocolVersion);
-
-	/* Add user name, database name, options */
-
-#define ADD_STARTUP_OPTION(optname, optval) \
-	do { \
-		if (packet) \
-			strcpy(packet + packet_len, optname); \
-		packet_len += strlen(optname) + 1; \
-		if (packet) \
-			strcpy(packet + packet_len, optval); \
-		packet_len += strlen(optval) + 1; \
-	} while(0)
-
-	if (conn->pguser && conn->pguser[0])
-		ADD_STARTUP_OPTION("user", conn->pguser);
-	if (conn->dbName && conn->dbName[0])
-		ADD_STARTUP_OPTION("database", conn->dbName);
-	if (conn->replication && conn->replication[0])
-		ADD_STARTUP_OPTION("replication", conn->replication);
-	if (conn->pgoptions && conn->pgoptions[0])
-		ADD_STARTUP_OPTION("options", conn->pgoptions);
-	if (conn->send_appname)
-	{
-		/* Use appname if present, otherwise use fallback */
-		val = conn->appname ? conn->appname : conn->fbappname;
-		if (val && val[0])
-			ADD_STARTUP_OPTION("application_name", val);
-	}
-
-	if (conn->client_encoding_initial && conn->client_encoding_initial[0])
-		ADD_STARTUP_OPTION("client_encoding", conn->client_encoding_initial);
-
-	/* Add any environment-driven GUC settings needed */
-	for (next_eo = options; next_eo->envName; next_eo++)
-	{
-		if ((val = getenv(next_eo->envName)) != NULL)
-		{
-			if (pg_strcasecmp(val, "default") != 0)
-				ADD_STARTUP_OPTION(next_eo->pgName, val);
-		}
-	}
-
-	/* Add trailing terminator */
-	if (packet)
-		packet[packet_len] = '\0';
-	packet_len++;
-
-	return packet_len;
-}