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/*

 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for

 * unrestricted use provided that this legend is included on all tape

 * media and as a part of the software program in whole or part.  Users

 * may copy or modify Sun RPC without charge, but are not authorized

 * to license or distribute it to anyone else except as part of a product or

 * program developed by the user.

 *

 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE

 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.

 *

 * Sun RPC is provided with no support and without any obligation on the

 * part of Sun Microsystems, Inc. to assist in its use, correction,

 * modification or enhancement.

 *

 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE

 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC

 * OR ANY PART THEREOF.

 *

 * In no event will Sun Microsystems, Inc. be liable for any lost revenue

 * or profits or other special, indirect and consequential damages, even if

 * Sun has been advised of the possibility of such damages.

 *

 * Sun Microsystems, Inc.

 * 2550 Garcia Avenue

 * Mountain View, California  94043

 */

/*

 * xdr_sizeof.c

 *

 * Copyright 1990 Sun Microsystems, Inc.

 *

 * General purpose routine to see how much space something will use

 * when serialized using XDR.

 */

#include <rpc/types.h>

#include <rpc/xdr.h>

#include <sys/types.h>

#include <stdlib.h>

/* ARGSUSED */

static bool_t

x_putlong(xdrs, longp)

        XDR *xdrs;

        long *longp;

{

        xdrs->x_handy += BYTES_PER_XDR_UNIT;

        return (TRUE);

}

/* ARGSUSED */

static bool_t

x_putbytes(xdrs, bp, len)

        XDR *xdrs;

        char  *bp;

        int len;

{

        xdrs->x_handy += len;

        return (TRUE);

}

static u_int

x_getpostn(xdrs)

        XDR *xdrs;

{

        return (xdrs->x_handy);

}

/* ARGSUSED */

static bool_t

x_setpostn(xdrs, pos)

        XDR *xdrs;

        u_int pos;

{

        /* This is not allowed */

        return (FALSE);

}

static int32_t *

x_inline(xdrs, len)

        XDR *xdrs;

        long len;

{

        if (len == 0) {

                return (NULL);

        }

        if (xdrs->x_op != XDR_ENCODE) {

                return (NULL);

        }

        if (len < (long) xdrs->x_base) {

                /* x_private was already allocated */

                xdrs->x_handy += len;

                return ((int32_t *) xdrs->x_private);

        } else {

                /* Free the earlier space and allocate new area */

                if (xdrs->x_private)

                        free(xdrs->x_private);

                if ((xdrs->x_private = (caddr_t) malloc(len)) == NULL) {

                        xdrs->x_base = 0;

                        return (NULL);

                }

                xdrs->x_base = (caddr_t) len;

                xdrs->x_handy += len;

                return ((int32_t *) xdrs->x_private);

        }

}

static int

harmless()

{

        /* Always return FALSE/NULL, as the case may be */

        return (0);

}

static void

x_destroy(xdrs)

        XDR *xdrs;

{

        xdrs->x_handy = 0;

        xdrs->x_base = 0;

        if (xdrs->x_private) {

                free(xdrs->x_private);

                xdrs->x_private = NULL;

        }

        return;

}

unsigned long

xdr_sizeof(func, data)

        xdrproc_t func;

        void *data;

{

        XDR x;

        struct xdr_ops ops;

        bool_t stat;

        /* to stop ANSI-C compiler from complaining */

        typedef  bool_t (* dummyfunc1)(XDR *, long *);

        typedef  bool_t (* dummyfunc2)(XDR *, caddr_t, u_int);

        ops.x_putlong = x_putlong;

        ops.x_putbytes = x_putbytes;

        ops.x_inline = x_inline;

        ops.x_getpostn = x_getpostn;

        ops.x_setpostn = x_setpostn;

        ops.x_destroy = x_destroy;

        /* the other harmless ones */

        ops.x_getlong =  (dummyfunc1) harmless;

        ops.x_getbytes = (dummyfunc2) harmless;

        x.x_op = XDR_ENCODE;

        x.x_ops = &ops;

        x.x_handy = 0;

        x.x_private = (caddr_t) NULL;

        x.x_base = (caddr_t) 0;

        stat = func(&x, data);

        if (x.x_private)

                free(x.x_private);

        return (stat == TRUE ? (unsigned) x.x_handy: 0);

}