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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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
/* ARGSUSED */
static bool_t
x_putlong(XDR *xdrs, const long *longp)
{
xdrs->x_handy += BYTES_PER_XDR_UNIT;
return (TRUE);
}
/* ARGSUSED */
static bool_t
x_putbytes(XDR *xdrs, const char *bp, u_int len)
{
xdrs->x_handy += len;
return (TRUE);
}
static u_int
x_getpostn(XDR *xdrs)
{
return (xdrs->x_handy);
}
/* ARGSUSED */
static bool_t
x_setpostn(XDR *xdrs, u_int pos)
{
/* This is not allowed */
return (FALSE);
}
static int32_t *
x_inline(XDR *xdrs, u_int len)
{
if (len == 0) {
return (NULL);
}
if (xdrs->x_op != XDR_ENCODE) {
return (NULL);
}
if (len < (u_int)(uintptr_t)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, M_RPC);
if ((xdrs->x_private = (caddr_t) malloc(len, M_RPC, M_WAITOK)) == NULL) {
xdrs->x_base = 0;
return (NULL);
}
xdrs->x_base = (caddr_t)(uintptr_t) len;
xdrs->x_handy += len;
return ((int32_t *) xdrs->x_private);
}
}
static int
harmless(void)
{
/* Always return FALSE/NULL, as the case may be */
return (0);
}
static void
x_destroy(XDR *xdrs)
{
xdrs->x_handy = 0;
xdrs->x_base = 0;
if (xdrs->x_private) {
free(xdrs->x_private, M_RPC);
xdrs->x_private = NULL;
}
return;
}
unsigned long
xdr_sizeof(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, M_RPC);
return (stat == TRUE ? (unsigned) x.x_handy: 0);
}
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