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164 lines
3.6 KiB
C
164 lines
3.6 KiB
C
/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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/*
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* xdr_sizeof.c
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*
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* Copyright 1990 Sun Microsystems, Inc.
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*
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* General purpose routine to see how much space something will use
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* when serialized using XDR.
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*/
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#include <sys/types.h>
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#include <stdlib.h>
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/* ARGSUSED */
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static bool_t
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x_putlong(xdrs, longp)
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XDR *xdrs;
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long *longp;
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{
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xdrs->x_handy += BYTES_PER_XDR_UNIT;
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return (TRUE);
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}
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/* ARGSUSED */
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static bool_t
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x_putbytes(xdrs, bp, len)
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XDR *xdrs;
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char *bp;
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int len;
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{
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xdrs->x_handy += len;
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return (TRUE);
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}
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static u_int
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x_getpostn(xdrs)
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XDR *xdrs;
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{
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return (xdrs->x_handy);
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}
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/* ARGSUSED */
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static bool_t
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x_setpostn(xdrs, pos)
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XDR *xdrs;
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u_int pos;
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{
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/* This is not allowed */
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return (FALSE);
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}
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static int32_t *
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x_inline(xdrs, len)
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XDR *xdrs;
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int len;
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{
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if (len == 0) {
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return (NULL);
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}
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if (xdrs->x_op != XDR_ENCODE) {
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return (NULL);
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}
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if (len < (int) xdrs->x_base) {
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/* x_private was already allocated */
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xdrs->x_handy += len;
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return ((int32_t *) xdrs->x_private);
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} else {
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/* Free the earlier space and allocate new area */
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if (xdrs->x_private)
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free(xdrs->x_private);
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if ((xdrs->x_private = (caddr_t) malloc(len)) == NULL) {
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xdrs->x_base = 0;
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return (NULL);
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}
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xdrs->x_base = (caddr_t) len;
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xdrs->x_handy += len;
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return ((int32_t *) xdrs->x_private);
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}
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}
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static int
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harmless()
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{
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/* Always return FALSE/NULL, as the case may be */
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return (0);
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}
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static void
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x_destroy(xdrs)
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XDR *xdrs;
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{
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xdrs->x_handy = 0;
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xdrs->x_base = 0;
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if (xdrs->x_private) {
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free(xdrs->x_private);
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xdrs->x_private = NULL;
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}
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return;
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}
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unsigned long
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xdr_sizeof(func, data)
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xdrproc_t func;
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void *data;
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{
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XDR x;
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struct xdr_ops ops;
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bool_t stat;
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/* to stop ANSI-C compiler from complaining */
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typedef bool_t (* dummyfunc1)(XDR *, long *);
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typedef bool_t (* dummyfunc2)(XDR *, caddr_t, u_int);
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ops.x_putlong = x_putlong;
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ops.x_putbytes = x_putbytes;
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ops.x_inline = x_inline;
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ops.x_getpostn = x_getpostn;
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ops.x_setpostn = x_setpostn;
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ops.x_destroy = x_destroy;
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/* the other harmless ones */
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ops.x_getlong = (dummyfunc1) harmless;
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ops.x_getbytes = (dummyfunc2) harmless;
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x.x_op = XDR_ENCODE;
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x.x_ops = &ops;
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x.x_handy = 0;
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x.x_private = (caddr_t) NULL;
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x.x_base = (caddr_t) 0;
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stat = func(&x, data);
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if (x.x_private)
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free(x.x_private);
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return (stat == TRUE ? (unsigned) x.x_handy: 0);
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}
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