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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 1.4 1996/12/31 07:29:17 bryanh 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)
{
int status;
if (f == NULL)
return 1;
if (debug) fputs("To backend>", debug);
while (len--) {
status = fputc(*s,f);
if (debug)
fputc(*s,debug);
s++;
if (status == EOF)
return 1;
}
if (debug) fputc('\n', debug);
return 0;
}
/* pqGetnchar:
get a string of exactly len length from stream f
*/
int
pqGetnchar(char* s, int len, FILE *f, FILE *debug)
{
int c;
if (f == NULL)
return 1;
while (len-- && (c = getc(f)) != EOF)
*s++ = c;
*s = '\0';
if (debug) {
fprintf(debug, "From backend> %s\n", 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;
if (f == NULL)
return 1;
while (len-- && (c = getc(f)) != EOF && c)
*s++ = c;
*s = '\0';
if (debug) {
fprintf(debug, "From backend> %s\n", s);
}
return 0;
}
/* pgPutInt
send an integer of up to 4 bytesto the file stream
do this one byte at at time.
This insures that machines with different ENDIANness can talk to each other
get a n-byte integer from the stream into result
returns 0 if successful, 1 otherwise
*/
int
pqPutInt(const int integer, int bytes, FILE* f, FILE *debug)
{
int i;
int status;
i = integer;
if (bytes > 4)
bytes = 4;
while (bytes--) {
status = fputc(i & 0xff, f);
i >>= 8;
if (status == EOF) {
return 1;
}
}
if (debug) fprintf(debug, "To backend (#)> %d\n", integer);
return 0;
}
/* pgGetInt
reconstructs the integer one byte at a time.
This insures that machines with different ENDIANness can talk to each other
get a n-byte integer from the stream into result
returns 0 if successful
*/
int
pqGetInt(int* result, int bytes, FILE* f, FILE *debug)
{
int c;
int p;
int n;
if (f == NULL)
return 1;
p = 0;
n = 0;
while (bytes && (c = getc(f)) != EOF)
{
n |= (c & 0xff) << p;
p += 8;
bytes--;
}
if (bytes != 0)
return 1;
*result = n;
if (debug)
fprintf(debug,"From backend (#)> %d\n",*result);
return 0;
}
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 EOF 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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