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#include <stdlib.h>
#include <stdio.h>
#include "postgres.h"
#include "libpq/pqcomm.h"
#ifdef HAVE_ENDIAN_H
#include <endian.h>
#endif
/* --------------------------------------------------------------------- */
/* These definitions for ntoh/hton are the other way around from the
* default system definitions, so we roll our own here.
*/
#ifndef BYTE_ORDER
#error BYTE_ORDER must be defined as LITTLE_ENDIAN, BIG_ENDIAN or PDP_ENDIAN
#endif
#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
#else /* BYTE_ORDER != LITTLE_ENDIAN */
#if BYTE_ORDER == BIG_ENDIAN
#define ntoh_s(n) (u_short)(((u_char *)&n)[1] << 8 \
| ((u_char *)&n)[0])
#define ntoh_l(n) (uint32) (((u_char *)&n)[3] << 24 \
| ((u_char *)&n)[2] << 16 \
| ((u_char *)&n)[1] << 8 \
| ((u_char *)&n)[0])
#define hton_s(n) (ntoh_s(n))
#define hton_l(n) (ntoh_l(n))
#else
/* BYTE_ORDER != BIG_ENDIAN */
#if BYTE_ORDER == PDP_ENDIAN
#error PDP_ENDIAN macros not written yet
#else
/* BYTE_ORDER != anything known */
#error BYTE_ORDER not defined as anything understood
#endif /* BYTE_ORDER == PDP_ENDIAN */
#endif /* BYTE_ORDER == BIG_ENDIAN */
#endif /* BYTE_ORDER == LITTLE_ENDIAN */
/* --------------------------------------------------------------------- */
int
pqPutShort(int integer, FILE *f)
{
int retval = 0;
u_short n,
s;
s = integer;
n = hton_s(s);
if (fwrite(&n, sizeof(u_short), 1, f) != 1)
retval = EOF;
return retval;
}
/* --------------------------------------------------------------------- */
int
pqPutLong(int integer, FILE *f)
{
int retval = 0;
uint32 n;
n = hton_l(integer);
if (fwrite(&n, sizeof(uint32), 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;
uint32 n;
if (fread(&n, sizeof(uint32), 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, size_t 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, size_t len, FILE *f)
{
if (f == NULL)
return 0;
if (fwrite(s, 1, len, f) != len)
return EOF;
return 0;
}
/* --------------------------------------------------------------------- */
int
pqGetString(char *s, size_t 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(int c, FILE *f)
{
if (!f)
return 0;
return (putc(c, f) == c) ? 0 : EOF;
}
/* --------------------------------------------------------------------- */
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