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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
/* --------------------------------------------------------------------- */
/* Is the other way around than system ntoh/hton, 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)[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))
# 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;
n = hton_s(integer);
if(fwrite(&n, sizeof(u_short), 1, f) != 1)
retval = EOF;
return retval;
}
/* --------------------------------------------------------------------- */
int pqPutLong(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, 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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