newlib-cygwin/newlib/libc/xdr/xdr_sizeof.c

182 lines
4.6 KiB
C

/*
* Copyright (c) 2009, Sun Microsystems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of Sun Microsystems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* 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>
#include "xdr_private.h"
/* ARGSUSED */
static bool_t
_DEFUN (x_putlong, (xdrs, longp),
XDR * xdrs _AND
_CONST long *longp)
{
xdrs->x_handy += BYTES_PER_XDR_UNIT;
return TRUE;
}
/* ARGSUSED */
static bool_t
_DEFUN (x_putbytes, (xdrs, bp, len),
XDR * xdrs _AND
const char *bp _AND
u_int len)
{
xdrs->x_handy += len;
return TRUE;
}
static u_int
_DEFUN (x_getpostn, (xdrs),
XDR * xdrs)
{
return xdrs->x_handy;
}
/* ARGSUSED */
static bool_t
_DEFUN (x_setpostn, (xdrs, pos),
XDR * xdrs _AND
u_int pos)
{
/* This is not allowed */
return FALSE;
}
static int32_t *
_DEFUN (x_inline, (xdrs, len),
XDR * xdrs _AND
u_int len)
{
if (len == 0)
return NULL;
if (xdrs->x_op != XDR_ENCODE)
return NULL;
if (len < (u_int) (long int) 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)
mem_free (xdrs->x_private, sizeof (xdrs->x_private));
if ((xdrs->x_private = (caddr_t) mem_alloc (len)) == NULL)
{
xdrs->x_base = 0;
return NULL;
}
xdrs->x_base = (caddr_t) (intptr_t) len;
xdrs->x_handy += len;
return (int32_t *) xdrs->x_private;
}
}
static int
_DEFUN_VOID (harmless)
{
/* Always return FALSE/NULL, as the case may be */
return 0;
}
static void
_DEFUN (x_destroy, (xdrs),
XDR * xdrs)
{
xdrs->x_handy = 0;
xdrs->x_base = 0;
if (xdrs->x_private)
{
mem_free (xdrs->x_private, sizeof (xdrs->x_private));
xdrs->x_private = NULL;
}
return;
}
static bool_t
_DEFUN (x_putint32, (xdrs, int32p),
XDR *xdrs _AND
_CONST int32_t *int32p)
{
xdrs->x_handy += BYTES_PER_XDR_UNIT;
return TRUE;
}
unsigned long
_DEFUN (xdr_sizeof, (func, data),
xdrproc_t func _AND
_PTR data)
{
XDR x;
struct xdr_ops ops;
bool_t stat;
/* to stop ANSI-C compiler from complaining */
typedef bool_t _EXFNPTR (dummyfunc1, (XDR *, long *));
typedef bool_t _EXFNPTR (dummyfunc2, (XDR *, caddr_t, u_int));
typedef bool_t _EXFNPTR (dummyfunc3, (XDR *, int32_t *));
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;
ops.x_putint32 = x_putint32;
/* the other harmless ones */
ops.x_getlong = (dummyfunc1) harmless;
ops.x_getbytes = (dummyfunc2) harmless;
ops.x_getint32 = (dummyfunc3) 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)
mem_free (x.x_private, sizeof (x.x_private));
return (stat == TRUE ? x.x_handy : 0);
}