Subject: Re: Encoding of doulbes by xdr
To: J.T. Conklin <>
From: Kent Vander Velden <>
List: current-users
Date: 03/21/1995 22:12:03
In message <>, wri
>> Has anyone else noticed the xdr library does not seem to encode doubles
>> properly?  At least this seems to be the case with version 12.1 of libc.
>Do you have some example code that fails?  On what architecture are you
>encountering failures.

  i386 architecture

  example code:

#include <stdio.h>
#include <stdlib.h>
#include <rpc/types.h>
#include <rpc/xdr.h>

main(void) {
  double x=3.14159;
  double y=0.0;
  char *xdr_buffer=NULL;
  XDR xdrs;
  int nbytes=sizeof(double);

  xdr_buffer = (char*)malloc(nbytes);

  xdrmem_create(&xdrs, xdr_buffer, nbytes, XDR_ENCODE);
  xdr_double(&xdrs, &x);

  xdrmem_create(&xdrs, xdr_buffer, nbytes, XDR_DECODE);
  xdr_double(&xdrs, &y);


  printf("before encoding=%f\nafter encoding=%f\n", x, y);

  return 0;

example results:

before encoding=3.141590
after encoding=-10683321609893104454175034763405708008063329617849858696815696097337486842230719357143679172008298562466964440577435979420962398737579232393354786421772637683370419217363074653701888571608996294938219310663181602857278529041210540032.000000

>I tested this extensively when I first made it work, but it is
>possible that someone's broken it since then.
>I'll take a look.
>	--jtc

  I noticed and a friend pointed out that xdr_float.c was updated in the last
couple of days.  The last time that I built and installed current was on March

Kent Vander Velden