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/*-------------------------------------------------------------------------
*
* FILE
* fe-misc.c
*
* DESCRIPTION
* miscellaneous useful functions
* these routines are analogous to the ones in libpq/pqcomm.c
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-misc.c,v 1.8 1997/09/08 21:55:44 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include <stdlib.h>
#include <stdio.h>
#include "postgres.h"
#include "libpq-fe.h"
/* --------------------------------------------------------------------- */
/* pqGetc:
get a character from stream f
if debug is set, also echo the character fetched
*/
int
pqGetc(FILE *fin, FILE *debug)
{
int c;
c = getc(fin);
if (debug && c != EOF)
fprintf(debug, "From backend> %c\n", c);
return c;
}
/* --------------------------------------------------------------------- */
/* pqPutnchar:
send a string of exactly len length into stream f
returns 1 if there was an error, 0 otherwise.
*/
int
pqPutnchar(const char *s, int len, FILE *f, FILE *debug)
{
if (f == NULL)
return 1;
if (debug)
fprintf(debug, "To backend> %s\n", s);
if (fwrite(s, 1, len, f) != len)
return 1;
return 0;
}
/* --------------------------------------------------------------------- */
/* pqGetnchar:
get a string of exactly len length from stream f
*/
int
pqGetnchar(char *s, int len, FILE *f, FILE *debug)
{
int cnt;
if (f == NULL)
return 1;
cnt = fread(s, 1, len, f);
s[cnt] = '\0';
/* mjl: actually needs up to len+1 bytes, is this okay? XXX */
if (debug)
fprintf(debug, "From backend (%d)> %s\n", len, s);
return 0;
}
/* --------------------------------------------------------------------- */
/* pqGets:
get a string of up to length len from stream f
*/
int
pqGets(char *s, int len, FILE *f, FILE *debug)
{
int c;
const char *str = s;
if (f == NULL)
return 1;
while (len-- && (c = getc(f)) != EOF && c)
*s++ = c;
*s = '\0';
/* mjl: actually needs up to len+1 bytes, is this okay? XXX */
if (debug)
fprintf(debug, "From backend> \"%s\"\n", str);
return 0;
}
/* --------------------------------------------------------------------- */
/* pgPutInt
send an integer of 2 or 4 bytes to the file stream, compensate
for host endianness.
returns 0 if successful, 1 otherwise
*/
int
pqPutInt(const int integer, int bytes, FILE *f, FILE *debug)
{
int retval = 0;
switch (bytes)
{
case 2:
retval = pqPutShort(integer, f);
break;
case 4:
retval = pqPutLong(integer, f);
break;
default:
fprintf(stderr, "** int size %d not supported\n", bytes);
retval = 1;
}
if (debug)
fprintf(debug, "To backend (%d#)> %d\n", bytes, integer);
return retval;
}
/* --------------------------------------------------------------------- */
/* pgGetInt
read a 2 or 4 byte integer from the stream and swab it around
to compensate for different endianness
returns 0 if successful
*/
int
pqGetInt(int *result, int bytes, FILE *f, FILE *debug)
{
int retval = 0;
switch (bytes)
{
case 2:
retval = pqGetShort(result, f);
break;
case 4:
retval = pqGetLong(result, f);
break;
default:
fprintf(stderr, "** int size %d not supported\n", bytes);
retval = 1;
}
if (debug)
fprintf(debug, "From backend (#%d)> %d\n", bytes, *result);
return retval;
}
/* --------------------------------------------------------------------- */
int
pqPuts(const char *s, FILE *f, FILE *debug)
{
if (f == NULL)
return 1;
if (fputs(s, f) == EOF)
return 1;
fputc('\0', f); /* important to send an ending \0 since
* backend expects it */
fflush(f);
if (debug)
{
fprintf(debug, "To backend> %s\n", s);
}
return 0;
}
/* --------------------------------------------------------------------- */
void
pqFlush(FILE *f, FILE *debug)
{
if (f)
fflush(f);
if (debug)
fflush(debug);
}
/* --------------------------------------------------------------------- */
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