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/*
* xdr_stdio.c, XDR implementation on standard i/o file.
*
* Copyright (c) 2010, Oracle America, Inc.
*
* 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 the "Oracle America, 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.
*
* 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 <rpc/types.h>
#include <stdio.h>
#include <rpc/xdr.h>
#ifdef USE_IN_LIBIO
# include <libio/iolibio.h>
# define fflush(s) INTUSE(_IO_fflush) (s)
# define fread(p, m, n, s) INTUSE(_IO_fread) (p, m, n, s)
# define ftell(s) INTUSE(_IO_ftell) (s)
# define fwrite(p, m, n, s) INTUSE(_IO_fwrite) (p, m, n, s)
#endif
static bool_t xdrstdio_getlong (XDR *, long *);
static bool_t xdrstdio_putlong (XDR *, const long *);
static bool_t xdrstdio_getbytes (XDR *, caddr_t, u_int);
static bool_t xdrstdio_putbytes (XDR *, const char *, u_int);
static u_int xdrstdio_getpos (const XDR *);
static bool_t xdrstdio_setpos (XDR *, u_int);
static int32_t *xdrstdio_inline (XDR *, u_int);
static void xdrstdio_destroy (XDR *);
static bool_t xdrstdio_getint32 (XDR *, int32_t *);
static bool_t xdrstdio_putint32 (XDR *, const int32_t *);
/*
* Ops vector for stdio type XDR
*/
static const 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 */
xdrstdio_getint32, /* deserialize a int */
xdrstdio_putint32 /* serialize a int */
};
/*
* 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;
/* We have to add the const since the `struct xdr_ops' in `struct XDR'
is not `const'. */
xdrs->x_ops = (struct xdr_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 *lp)
{
u_int32_t mycopy;
if (fread ((caddr_t) &mycopy, 4, 1, (FILE *) xdrs->x_private) != 1)
return FALSE;
*lp = (long) ntohl (mycopy);
return TRUE;
}
static bool_t
xdrstdio_putlong (XDR *xdrs, const long *lp)
{
int32_t mycopy = htonl ((u_int32_t) *lp);
if (fwrite ((caddr_t) &mycopy, 4, 1, (FILE *) xdrs->x_private) != 1)
return FALSE;
return TRUE;
}
static bool_t
xdrstdio_getbytes (XDR *xdrs, const 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, const char *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 (const 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, 0) < 0 ? FALSE : TRUE;
}
static int32_t *
xdrstdio_inline (XDR *xdrs, u_int len)
{
/*
* Must do some work to implement this: must insure
* 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;
}
static bool_t
xdrstdio_getint32 (XDR *xdrs, int32_t *ip)
{
int32_t mycopy;
if (fread ((caddr_t) &mycopy, 4, 1, (FILE *) xdrs->x_private) != 1)
return FALSE;
*ip = ntohl (mycopy);
return TRUE;
}
static bool_t
xdrstdio_putint32 (XDR *xdrs, const int32_t *ip)
{
int32_t mycopy = htonl (*ip);
ip = &mycopy;
if (fwrite ((caddr_t) ip, 4, 1, (FILE *) xdrs->x_private) != 1)
return FALSE;
return TRUE;
}
libc_hidden_def (xdrstdio_create)
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