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

207 lines
5.8 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_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>
#include "xdr_private.h"
#ifndef ntohl
# define ntohl(x) xdr_ntohl(x)
#endif
#ifndef htonl
# define htonl(x) xdr_htonl(x)
#endif
static void xdrstdio_destroy (XDR *);
static bool_t xdrstdio_getlong (XDR *, long *);
static bool_t xdrstdio_putlong (XDR *, const long *);
static bool_t xdrstdio_getbytes (XDR *, char *, u_int);
static bool_t xdrstdio_putbytes (XDR *, const char *, 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 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, /* deseraialize a long int */
xdrstdio_putlong, /* seraialize 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, /* deseraialize an int */
xdrstdio_putint32 /* seraialize an long 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;
xdrs->x_ops = (struct xdr_ops *) &xdrstdio_ops;
xdrs->x_private = (void *) 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);
/* XXX: should we close the file ?? */
}
static bool_t
xdrstdio_getlong (XDR * xdrs,
long *lp)
{
u_int32_t temp;
if (fread (&temp, sizeof (int32_t), 1, (FILE *) xdrs->x_private) != 1)
return FALSE;
*lp = (long) (int32_t) ntohl (temp);
return TRUE;
}
static bool_t
xdrstdio_putlong (XDR * xdrs,
const long *lp)
{
u_int32_t temp = htonl ((u_int32_t) * lp);
if (fwrite (&temp, sizeof (int32_t), 1, (FILE *) xdrs->x_private) != 1)
return FALSE;
return TRUE;
}
static bool_t
xdrstdio_getbytes (XDR * xdrs,
char *addr,
u_int len)
{
if ((len != 0) && (fread (addr, (size_t) 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, (size_t) 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, 0) < 0) ?
FALSE : TRUE);
}
/* ARGSUSED */
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 temp;
if (fread (&temp, sizeof (int32_t), 1, (FILE *) xdrs->x_private) != 1)
return FALSE;
*ip = ntohl (temp);
return TRUE;
}
static bool_t
xdrstdio_putint32 (XDR *xdrs,
const int32_t *ip)
{
int32_t temp = htonl (*ip);
if (fwrite (&temp, sizeof (int32_t), 1, (FILE *) xdrs->x_private) != 1)
return FALSE;
return TRUE;
}