mirror of
https://git.postgresql.org/git/postgresql.git
synced 2025-01-24 18:55:04 +08:00
- Move most of the I/O in both libpq and the backend to a set
of common routines in pqcomprim.c (pq communication primitives).
Not all adapted to it yet, but it's a start.
- Rewritten some of those routines, to write/read bigger chunks of
data, precomputing stuff in buffers instead of sending out byte
by byte.
- As a consequence, I need to know the endianness of the machine.
Currently I rely on getting it from machine/endian.h, but this
may not be available everywhere? (Who the hell thought it was
a good idea to pass integers to the backend the other way around
than the normal network byte order? *argl*)
- Libpq looks in the environment for magic variables, and upon
establishing a connection to the backend, sends it queries
of the form "SET var_name TO 'var_value'". This needs a change
in the backend parser (Mr. Parser, are you there? :)
- Currently it looks for two Env-Vars, namely PG_DATEFORMAT
and PG_FLOATFORMAT. What else makes sense? PG_TIMEFORMAT?
PG_TIMEZONE?
From: "Martin J. Laubach" <mjl@wwx.vip.at>
This commit is contained in:
Marc G. Fournier
parent
d146305065
commit
812a6c2b54
@ -4,7 +4,7 @@
|
||||
# Makefile for libpq subsystem (backend half of libpq interface)
|
||||
#
|
||||
# IDENTIFICATION
|
||||
# $Header: /cvsroot/pgsql/src/backend/libpq/Makefile,v 1.5 1997/03/12 21:17:45 scrappy Exp $
|
||||
# $Header: /cvsroot/pgsql/src/backend/libpq/Makefile,v 1.6 1997/03/18 20:14:32 scrappy Exp $
|
||||
#
|
||||
#-------------------------------------------------------------------------
|
||||
|
||||
@ -23,7 +23,7 @@ CFLAGS+= $(KRBFLAGS)
|
||||
LDADD+= $(KRBLIBS)
|
||||
endif
|
||||
|
||||
OBJS = be-dumpdata.o be-fsstubs.o be-pqexec.o \
|
||||
OBJS = be-dumpdata.o be-fsstubs.o be-pqexec.o pqcomprim.o\
|
||||
auth.o hba.o pqcomm.o portal.o util.o portalbuf.o pqpacket.o pqsignal.o \
|
||||
password.o
|
||||
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
/*-------------------------------------------------------------------------
|
||||
/*-------------------------------------------------------------------------
|
||||
*
|
||||
* pqcomm.c--
|
||||
* Communication functions between the Frontend and the Backend
|
||||
@ -7,7 +7,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/libpq/pqcomm.c,v 1.12 1997/03/12 21:17:58 scrappy Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/libpq/pqcomm.c,v 1.13 1997/03/18 20:14:33 scrappy Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -206,26 +206,29 @@ pq_getstr(char *s, int maxlen)
|
||||
* the line ended within maxlen bytes.)
|
||||
* 1 in other cases
|
||||
*/
|
||||
int
|
||||
PQgetline(char *s, int maxlen)
|
||||
{
|
||||
int c = '\0';
|
||||
|
||||
int PQgetline(char *s, int maxlen)
|
||||
{
|
||||
if (!Pfin || !s || maxlen <= 1)
|
||||
return(EOF);
|
||||
|
||||
for (; maxlen > 1 && (c = pq_getc(Pfin)) != '\n' && c != EOF; --maxlen) {
|
||||
*s++ = c;
|
||||
}
|
||||
if(fgets(s, maxlen - 1, Pfin) == NULL)
|
||||
{
|
||||
return feof(Pfin) ? EOF : 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
for( ; *s; *s++)
|
||||
{
|
||||
if(*s == '\n')
|
||||
{
|
||||
*s = '\0';
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (c == EOF) {
|
||||
return(EOF); /* error -- reached EOF before \n */
|
||||
} else if (c == '\n') {
|
||||
return(0); /* done with this line */
|
||||
return 0;
|
||||
}
|
||||
return(1); /* returning a full buffer */
|
||||
}
|
||||
|
||||
/*
|
||||
* USER FUNCTION - sends a string to the backend.
|
||||
@ -252,6 +255,9 @@ PQputline(char *s)
|
||||
int
|
||||
pq_getnchar(char *s, int off, int maxlen)
|
||||
{
|
||||
return pqGetNBytes(s + off, maxlen, Pfin);
|
||||
|
||||
#if 0
|
||||
int c = '\0';
|
||||
|
||||
if (Pfin == (FILE *) NULL) {
|
||||
@ -270,6 +276,7 @@ pq_getnchar(char *s, int off, int maxlen)
|
||||
if (c == EOF)
|
||||
return(EOF);
|
||||
return(!EOF);
|
||||
#endif
|
||||
}
|
||||
|
||||
/* --------------------------------
|
||||
@ -282,20 +289,38 @@ pq_getnchar(char *s, int off, int maxlen)
|
||||
int
|
||||
pq_getint(int b)
|
||||
{
|
||||
int n, c, p;
|
||||
int n, status = 1;
|
||||
|
||||
if (Pfin == (FILE *) NULL) {
|
||||
/* elog(DEBUG, "pq_getint: Input descriptor is null"); */
|
||||
return(EOF);
|
||||
if(!Pfin)
|
||||
return EOF;
|
||||
/* mjl: Seems inconsisten w/ return value of pq_putint (void). Also,
|
||||
EOF is a valid return value for an int! XXX */
|
||||
|
||||
switch(b)
|
||||
{
|
||||
case 1:
|
||||
status = ((n = fgetc(Pfin)) == EOF);
|
||||
break;
|
||||
case 2:
|
||||
pqGetShort(&n, Pfin);
|
||||
break;
|
||||
case 4:
|
||||
pqGetLong(&n, Pfin);
|
||||
break;
|
||||
default:
|
||||
fprintf(stderr, "** Unsupported size %d\n", b);
|
||||
}
|
||||
|
||||
n = p = 0;
|
||||
while (b-- && (c = pq_getc(Pfin)) != EOF && p < 32) {
|
||||
n |= (c & 0xff) << p;
|
||||
p += 8;
|
||||
if(status)
|
||||
{
|
||||
(void) sprintf(PQerrormsg,
|
||||
"FATAL: pq_getint failed: errno=%d\n", errno);
|
||||
fputs(PQerrormsg, stderr);
|
||||
pqdebug("%s", PQerrormsg);
|
||||
n = 0;
|
||||
}
|
||||
|
||||
return(n);
|
||||
return n;
|
||||
}
|
||||
|
||||
/* --------------------------------
|
||||
@ -305,26 +330,13 @@ pq_getint(int b)
|
||||
void
|
||||
pq_putstr(char *s)
|
||||
{
|
||||
int status;
|
||||
|
||||
if (Pfout) {
|
||||
status = fputs(s, Pfout);
|
||||
if (status == EOF) {
|
||||
if(pqPutString(s, Pfout))
|
||||
{
|
||||
(void) sprintf(PQerrormsg,
|
||||
"FATAL: pq_putstr: fputs() failed: errno=%d\n",
|
||||
errno);
|
||||
"FATAL: pq_putstr: fputs() failed: errno=%d\n", errno);
|
||||
fputs(PQerrormsg, stderr);
|
||||
pqdebug("%s", PQerrormsg);
|
||||
}
|
||||
status = fputc('\0', Pfout);
|
||||
if (status == EOF) {
|
||||
(void) sprintf(PQerrormsg,
|
||||
"FATAL: pq_putstr: fputc() failed: errno=%d\n",
|
||||
errno);
|
||||
fputs(PQerrormsg, stderr);
|
||||
pqdebug("%s", PQerrormsg);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* --------------------------------
|
||||
@ -333,13 +345,9 @@ pq_putstr(char *s)
|
||||
*/
|
||||
void
|
||||
pq_putnchar(char *s, int n)
|
||||
{
|
||||
int status;
|
||||
|
||||
if (Pfout) {
|
||||
while (n--) {
|
||||
status = fputc(*s++, Pfout);
|
||||
if (status == EOF) {
|
||||
{
|
||||
if(pqPutNBytes(s, n, Pfout))
|
||||
{
|
||||
(void) sprintf(PQerrormsg,
|
||||
"FATAL: pq_putnchar: fputc() failed: errno=%d\n",
|
||||
errno);
|
||||
@ -347,8 +355,6 @@ pq_putnchar(char *s, int n)
|
||||
pqdebug("%s", PQerrormsg);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* --------------------------------
|
||||
* pq_putint - send an integer to connection
|
||||
@ -362,22 +368,31 @@ pq_putint(int i, int b)
|
||||
{
|
||||
int status;
|
||||
|
||||
if (b > 4)
|
||||
b = 4;
|
||||
if(!Pfout) return;
|
||||
|
||||
if (Pfout) {
|
||||
while (b--) {
|
||||
status = fputc(i & 0xff, Pfout);
|
||||
i >>= 8;
|
||||
if (status == EOF) {
|
||||
status = 1;
|
||||
switch(b)
|
||||
{
|
||||
case 1:
|
||||
status = (fputc(i, Pfout) == EOF);
|
||||
break;
|
||||
case 2:
|
||||
status = pqPutShort(i, Pfout);
|
||||
break;
|
||||
case 4:
|
||||
status = pqPutLong(i, Pfout);
|
||||
break;
|
||||
default:
|
||||
fprintf(stderr, "** Unsupported size %d\n", b);
|
||||
}
|
||||
|
||||
if(status)
|
||||
{
|
||||
(void) sprintf(PQerrormsg,
|
||||
"FATAL: pq_putint: fputc() failed: errno=%d\n",
|
||||
errno);
|
||||
"FATAL: pq_putint failed: errno=%d\n", errno);
|
||||
fputs(PQerrormsg, stderr);
|
||||
pqdebug("%s", PQerrormsg);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* ---
|
||||
|
||||
@ -27,6 +27,164 @@
|
||||
#error Please write byte order macros
|
||||
#endif
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
int pqPutShort(const int integer, FILE *f)
|
||||
{
|
||||
int retval = 0;
|
||||
u_short n;
|
||||
|
||||
n = hton_s(integer);
|
||||
if(fwrite(&n, sizeof(u_short), 1, f) != 1)
|
||||
retval = EOF;
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
int pqPutLong(const int integer, FILE *f)
|
||||
{
|
||||
int retval = 0;
|
||||
u_long n;
|
||||
|
||||
n = hton_l(integer);
|
||||
if(fwrite(&n, sizeof(u_long), 1, f) != 1)
|
||||
retval = EOF;
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
int pqGetShort(int *result, FILE *f)
|
||||
{
|
||||
int retval = 0;
|
||||
u_short n;
|
||||
|
||||
if(fread(&n, sizeof(u_short), 1, f) != 1)
|
||||
retval = EOF;
|
||||
|
||||
*result = ntoh_s(n);
|
||||
return retval;
|
||||
}
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
int pqGetLong(int *result, FILE *f)
|
||||
{
|
||||
int retval = 0;
|
||||
u_long n;
|
||||
|
||||
if(fread(&n, sizeof(u_long), 1, f) != 1)
|
||||
retval = EOF;
|
||||
|
||||
*result = ntoh_l(n);
|
||||
return retval;
|
||||
}
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
/* pqGetNBytes: Read a chunk of exactly len bytes in buffer s.
|
||||
Return 0 if ok.
|
||||
*/
|
||||
int pqGetNBytes(char* s, const int len, FILE *f)
|
||||
{
|
||||
int cnt;
|
||||
|
||||
if (f == NULL)
|
||||
return EOF;
|
||||
|
||||
cnt = fread(s, 1, len, f);
|
||||
s[cnt] = '\0';
|
||||
/* mjl: actually needs up to len+1 bytes, is this okay? XXX */
|
||||
|
||||
return (cnt == len) ? 0 : EOF;
|
||||
}
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
int pqPutNBytes(const char *s, const int len, FILE *f)
|
||||
{
|
||||
if (f == NULL)
|
||||
return 0;
|
||||
|
||||
if(fwrite(s, 1, len, f) != len)
|
||||
return EOF;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
int pqGetString(char *s, int len, FILE *f)
|
||||
{
|
||||
int c;
|
||||
|
||||
if (f == NULL)
|
||||
return EOF;
|
||||
|
||||
while (len-- && (c = getc(f)) != EOF && c)
|
||||
*s++ = c;
|
||||
*s = '\0';
|
||||
/* mjl: actually needs up to len+1 bytes, is this okay? XXX */
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
int pqPutString(const char *s, FILE *f)
|
||||
{
|
||||
if (f == NULL)
|
||||
return 0;
|
||||
|
||||
if (fputs(s, f) == EOF)
|
||||
return EOF;
|
||||
|
||||
fputc('\0', f); /* important to send an ending \0 since backend expects it */
|
||||
fflush(f);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
int pqGetByte(FILE *f)
|
||||
{
|
||||
return getc(f);
|
||||
}
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
int pqPutByte(const int c, FILE *f)
|
||||
{
|
||||
if(!f) return 0;
|
||||
|
||||
return (putc(c, f) == c) ? 0 : EOF;
|
||||
}
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
|
||||
#include "postgres.h"
|
||||
#include "libpq/pqcomm.h"
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
/* Is the other way around than system ntoh/hton, so we roll our own
|
||||
here */
|
||||
|
||||
#if BYTE_ORDER == LITTLE_ENDIAN
|
||||
#define ntoh_s(n) n
|
||||
#define ntoh_l(n) n
|
||||
#define hton_s(n) n
|
||||
#define hton_l(n) n
|
||||
#endif
|
||||
#if BYTE_ORDER == BIG_ENDIAN
|
||||
#define ntoh_s(n) (u_short)(((u_char *) &n)[0] << 8 | ((u_char *) &n)[1]);
|
||||
#define ntoh_l(n) (u_long)(((u_char *)&n)[0] << 24 | ((u_char *)&n)[1] << 16 |\
|
||||
((u_char *)&n)[2] << 8 | ((u_char *)&n)[3]);
|
||||
#define hton_s(n) (ntoh_s(n))
|
||||
#define hton_l(n) (ntoh_l(n))
|
||||
#endif
|
||||
#if BYTE_ORDER == PDP_ENDIAN
|
||||
#endif
|
||||
#ifndef ntoh_s
|
||||
#error Please write byte order macros
|
||||
#endif
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
int pqPutShort(const int integer, FILE *f)
|
||||
{
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/utils/init/globals.c,v 1.6 1997/03/18 16:35:46 scrappy Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/utils/init/globals.c,v 1.7 1997/03/18 20:14:46 scrappy Exp $
|
||||
*
|
||||
* NOTES
|
||||
* Globals used all over the place should be declared here and not
|
||||
@ -71,6 +71,9 @@ bool CDayLight = false;
|
||||
int CTimeZone = 0;
|
||||
char CTZName[8] = "";
|
||||
|
||||
char DateFormat[20] = "%d-%m-%Y"; /* mjl: sizes! or better malloc? XXX */
|
||||
char FloatFormat[20] = "%f";
|
||||
|
||||
char *IndexedCatalogNames[] = {
|
||||
AttributeRelationName,
|
||||
ProcedureRelationName,
|
||||
|
||||
@ -11,7 +11,7 @@
|
||||
*
|
||||
* Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: miscadmin.h,v 1.6 1997/03/18 16:36:23 scrappy Exp $
|
||||
* $Id: miscadmin.h,v 1.7 1997/03/18 20:15:19 scrappy Exp $
|
||||
*
|
||||
* NOTES
|
||||
* some of the information in this file will be moved to
|
||||
@ -70,6 +70,9 @@ extern bool CDayLight;
|
||||
extern int CTimeZone;
|
||||
extern char CTZName[];
|
||||
|
||||
extern char FloatFormat[];
|
||||
extern char DateFormat[];
|
||||
|
||||
extern Oid LastOidProcessed; /* for query rewrite */
|
||||
|
||||
#define MAX_PARSE_BUFFER 8192
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.24 1997/03/12 21:23:09 scrappy Exp $
|
||||
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.25 1997/03/18 20:15:39 scrappy Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -100,6 +100,16 @@ static PQconninfoOption PQconninfoOptions[] = {
|
||||
NULL, NULL, 0 }
|
||||
};
|
||||
|
||||
struct EnvironmentOptions
|
||||
{
|
||||
const char *envName, *pgName;
|
||||
} EnvironmentOptions[] =
|
||||
{
|
||||
{ "PG_DATEFORMAT", "pg_dateformat" },
|
||||
{ "PG_FLOATFORMAT", "pg_floatformat" },
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
/* ----------------
|
||||
* PQconnectdb
|
||||
*
|
||||
@ -514,6 +524,24 @@ connectDB(PGconn *conn)
|
||||
|
||||
conn->port = port;
|
||||
|
||||
{
|
||||
struct EnvironmentOptions *eo;
|
||||
char setQuery[80]; /* mjl: size okay? XXX */
|
||||
|
||||
for(eo = EnvironmentOptions; eo->envName; eo++)
|
||||
{
|
||||
const char *val;
|
||||
|
||||
if(val = getenv(eo->envName))
|
||||
{
|
||||
PGresult *res;
|
||||
|
||||
sprintf(setQuery, "SET %s TO \".60%s\"", eo->pgName, val);
|
||||
res = PQexec(conn, setQuery);
|
||||
PQclear(res); /* Don't care? */
|
||||
}
|
||||
}
|
||||
}
|
||||
return CONNECTION_OK;
|
||||
|
||||
connect_errReturn:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user