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/*-------------------------------------------------------------------------
*
* libpq-int.h--
* This file contains internal definitions meant to be used only by
* the frontend libpq library, not by applications that call it.
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: libpq-int.h,v 1.1 1998/08/17 03:52:36 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef LIBPQ_INT_H
#define LIBPQ_INT_H
/* We assume libpq-fe.h has already been included. */
/* ----------------
* include stuff common to fe and be
* ----------------
*/
#include "libpq/pqcomm.h"
/* libpq supports this version of the frontend/backend protocol.
*
* NB: we used to use PG_PROTOCOL_LATEST from the backend pqcomm.h file,
* but that's not really the right thing: just recompiling libpq
* against a more recent backend isn't going to magically update it
* for most sorts of protocol changes. So, when you change libpq
* to support a different protocol revision, you have to change this
* constant too. PG_PROTOCOL_EARLIEST and PG_PROTOCOL_LATEST in
* pqcomm.h describe what the backend knows, not what libpq knows.
*/
#define PG_PROTOCOL_LIBPQ PG_PROTOCOL(2,0)
/* ----------------
* Internal functions of libpq
* Functions declared here need to be visible across files of libpq,
* but are not intended to be called by applications. We use the
* convention "pqXXX" for internal functions, vs. the "PQxxx" names
* used for application-visible routines.
* ----------------
*/
/* === in fe-connect.c === */
extern int pqPacketSend(PGconn *conn, const char *buf, size_t len);
/* === in fe-exec.c === */
extern void pqClearAsyncResult(PGconn *conn);
/* === in fe-misc.c === */
/* "Get" and "Put" routines return 0 if successful, EOF if not.
* Note that for Get, EOF merely means the buffer is exhausted,
* not that there is necessarily any error.
*/
extern int pqGetc(char *result, PGconn *conn);
extern int pqGets(char *s, int maxlen, PGconn *conn);
extern int pqPuts(const char *s, PGconn *conn);
extern int pqGetnchar(char *s, int len, PGconn *conn);
extern int pqPutnchar(const char *s, int len, PGconn *conn);
extern int pqGetInt(int *result, int bytes, PGconn *conn);
extern int pqPutInt(int value, int bytes, PGconn *conn);
extern int pqReadData(PGconn *conn);
extern int pqFlush(PGconn *conn);
extern int pqWait(int forRead, int forWrite, PGconn *conn);
/* max length of message to send */
#define MAX_MESSAGE_LEN 8193
/* maximum number of fields in a tuple */
#define MAX_FIELDS 512
/* bits in a byte */
#define BYTELEN 8
/* fall back options if they are not specified by arguments or defined
by environment variables */
#define DefaultHost "localhost"
#define DefaultTty ""
#define DefaultOption ""
#define DefaultAuthtype ""
#define DefaultPassword ""
/* supply an implementation of strerror() macro if system doesn't have it */
#ifndef strerror
#if defined(sun) && defined(sparc) && !defined(__SVR4)
extern char *sys_errlist[];
#define strerror(A) (sys_errlist[(A)])
#endif /* sunos4 */
#endif /* !strerror */
#endif /* LIBPQ_INT_H */
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