CITS3002 Computer Networks  
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The SunOS XDR Library, continued

Example:

The XDR routine to convert an integer is declared as 

  bool    xdr_int(XDR *xdrs, int *ip)

If we wish to XDR encode an integer and send it to standard out we would firstly create an XDR stream to encode data: 

  XDR *xdrs;
  int i;
          .
          .
  xdrstdio_create(xdrs, stdout, XDR_ENCODE);

and then call the function 

  i = 23;
  if(!xdr_int(xdrs, &i)) {
          error-handling
  }

To decode reading from standard input we would create the stream using 

  xdrstdio_create(xdrs, stdin, XDR_DECODE);

and use the same function call 

  if(!xdr_int(xdrs, &i)) {
          error-handling
  }

to receive the integer into variable i.

CITS3002 Computer Networks, Lecture 10, Architecture independent applications, p21, 8th May 2024.