Passing a Variable-Length Array Example

This section describes the procedure for passing a variable-length array example.

struct varintarr {
    int *data;
    int arrlnth;
} arr;

callrpc(hostname, PROGNUM, VERSNUM, PROCNUM,
        xdr_varintarr, &arr...);

xdr_varintarr(xdrsp, arrp)
    XDR *xdrsp;
    struct varintarr *arrp;
{
    return (xdr_array(xdrsp, &arrp->data, &arrp->arrlnth, 
        MAXLEN, sizeof(int), xdr_int));
}

This routine's parameters are the eXternal Data Representation (XDR) handle (xdrsp), a pointer to the array (aarp->data), a pointer to the size of the array (aarp->arrlnth), the maximum allowable array size (MAXLEN), the size of each array element (sizeof), and an XDR routine for handling each array element (xdr_int).