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Fix code to do the right thing with mixed-endian clients and servers.

This commit is contained in:
Thomas G. Lockhart 1997-07-01 00:32:27 +00:00
parent bf3bcb6a6d
commit 3ded6fd511
1 changed files with 15 additions and 11 deletions
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26
src/backend/libpq/pqcomprim.c
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@ -10,10 +10,11 @@
/* --------------------------------------------------------------------- */
/* Is the other way around than system ntoh/hton, so we roll our own
here */
#ifndef BYTE_ORDER
/* 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
@ -24,11 +25,13 @@
# 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) (u_short)(((u_char *) &n)[2] << 8 | ((u_char *) &n)[3])
# define ntoh_s(n) (u_short)(((u_char *)&n)[1] << 8 \
| ((u_char *)&n)[0])
# define ntoh_l(n) (u_long) (((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
@ -43,9 +46,10 @@
int pqPutShort(int integer, FILE *f)
{
int retval = 0;
u_short n;
u_short n,s;
n = hton_s(integer);
s = integer;
n = hton_s(s);
if(fwrite(&n, sizeof(u_short), 1, f) != 1)
retval = EOF;