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/* $OpenBSD: xdr_stdio.c,v 1.12 2008/12/09 19:40:10 otto Exp $ */
/*
* 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_stdio.c, XDR implementation on standard i/o file.
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*
* This set of routines implements a XDR on a stdio stream.
* XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes
* from the stream.
*/
#include <stdio.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
static bool_t xdrstdio_getlong(XDR *, long *);
static bool_t xdrstdio_putlong(XDR *, long *);
static bool_t xdrstdio_getbytes(XDR *, caddr_t, u_int);
static bool_t xdrstdio_putbytes(XDR *, caddr_t, u_int);
static u_int xdrstdio_getpos(XDR *);
static bool_t xdrstdio_setpos(XDR *, u_int);
static int32_t *xdrstdio_inline(XDR *, u_int);
static void xdrstdio_destroy(XDR *);
/*
* Ops vector for stdio type XDR
*/
static struct xdr_ops xdrstdio_ops = {
xdrstdio_getlong, /* deserialize a long int */
xdrstdio_putlong, /* serialize a long int */
xdrstdio_getbytes, /* deserialize counted bytes */
xdrstdio_putbytes, /* serialize counted bytes */
xdrstdio_getpos, /* get offset in the stream */
xdrstdio_setpos, /* set offset in the stream */
xdrstdio_inline, /* prime stream for inline macros */
xdrstdio_destroy, /* destroy stream */
NULL, /* xdrstdio_control */
};
/*
* Initialize a stdio xdr stream.
* Sets the xdr stream handle xdrs for use on the stream file.
* Operation flag is set to op.
*/
void
xdrstdio_create(XDR *xdrs, FILE *file, enum xdr_op op)
{
xdrs->x_op = op;
xdrs->x_ops = &xdrstdio_ops;
xdrs->x_private = (caddr_t)file;
xdrs->x_handy = 0;
xdrs->x_base = 0;
}
/*
* Destroy a stdio xdr stream.
* Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
*/
static void
xdrstdio_destroy(XDR *xdrs)
{
(void)fflush((FILE *)xdrs->x_private);
/* xx should we close the file ?? */
}
static bool_t
xdrstdio_getlong(XDR *xdrs, long int *lp)
{
u_int32_t temp;
if (fread(&temp, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1)
return (FALSE);
*lp = (long)ntohl(temp);
return (TRUE);
}
static bool_t
xdrstdio_putlong(XDR *xdrs, long int *lp)
{
int32_t mycopy = htonl((u_int32_t)*lp);
if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1)
return (FALSE);
return (TRUE);
}
static bool_t
xdrstdio_getbytes(XDR *xdrs, caddr_t addr, u_int len)
{
if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
return (FALSE);
return (TRUE);
}
static bool_t
xdrstdio_putbytes(XDR *xdrs, caddr_t addr, u_int len)
{
if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
return (FALSE);
return (TRUE);
}
static u_int
xdrstdio_getpos(XDR *xdrs)
{
return ((u_int) ftell((FILE *)xdrs->x_private));
}
static bool_t
xdrstdio_setpos(XDR *xdrs, u_int pos)
{
return ((fseek((FILE *)xdrs->x_private, (long)pos, SEEK_SET) < 0) ?
FALSE : TRUE);
}
/* ARGSUSED */
static int32_t *
xdrstdio_inline(XDR *xdrs, u_int len)
{
/*
* Must do some work to implement this: must ensure
* enough data in the underlying stdio buffer,
* that the buffer is aligned so that we can indirect through a
* long *, and stuff this pointer in xdrs->x_buf. Doing
* a fread or fwrite to a scratch buffer would defeat
* most of the gains to be had here and require storage
* management on this buffer, so we don't do this.
*/
return (NULL);
}
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