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

304 lines
7.9 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_mem.h, XDR implementation using memory buffers.
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*
* If you have some data to be interpreted as external data representation
* or to be converted to external data representation in a memory buffer,
* then this is the package for you.
*
*/
#include <sys/types.h>
#include <string.h>
#include <limits.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 xdrmem_destroy (XDR *);
static bool_t xdrmem_getlong_aligned (XDR *, long *);
static bool_t xdrmem_putlong_aligned (XDR *, const long *);
static bool_t xdrmem_getlong_unaligned (XDR *, long *);
static bool_t xdrmem_putlong_unaligned (XDR *, const long *);
static bool_t xdrmem_getbytes (XDR *, char *, u_int);
static bool_t xdrmem_putbytes (XDR *, const char *, u_int);
/* XXX: w/64-bit pointers, u_int not enough! */
static u_int xdrmem_getpos (XDR *);
static bool_t xdrmem_setpos (XDR *, u_int);
static int32_t * xdrmem_inline_aligned (XDR *, u_int);
static int32_t * xdrmem_inline_unaligned (XDR *, u_int);
static bool_t xdrmem_getint32_aligned (XDR *, int32_t *);
static bool_t xdrmem_putint32_aligned (XDR *, const int32_t *);
static bool_t xdrmem_getint32_unaligned (XDR *, int32_t *);
static bool_t xdrmem_putint32_unaligned (XDR *, const int32_t *);
static const struct xdr_ops xdrmem_ops_aligned = {
xdrmem_getlong_aligned,
xdrmem_putlong_aligned,
xdrmem_getbytes,
xdrmem_putbytes,
xdrmem_getpos,
xdrmem_setpos,
xdrmem_inline_aligned,
xdrmem_destroy,
xdrmem_getint32_aligned,
xdrmem_putint32_aligned
};
static const struct xdr_ops xdrmem_ops_unaligned = {
xdrmem_getlong_unaligned,
xdrmem_putlong_unaligned,
xdrmem_getbytes,
xdrmem_putbytes,
xdrmem_getpos,
xdrmem_setpos,
xdrmem_inline_unaligned,
xdrmem_destroy,
xdrmem_getint32_unaligned,
xdrmem_putint32_unaligned
};
/*
* The procedure xdrmem_create initializes a stream descriptor for a
* memory buffer.
*/
void
xdrmem_create (XDR * xdrs,
caddr_t addr,
u_int size,
enum xdr_op op)
{
xdrs->x_op = op;
xdrs->x_ops = ((unsigned long)addr & (sizeof (int32_t) - 1))
? (struct xdr_ops *)&xdrmem_ops_unaligned
: (struct xdr_ops *)&xdrmem_ops_aligned;
xdrs->x_private = xdrs->x_base = addr;
xdrs->x_handy = size;
}
static void
xdrmem_destroy (XDR * xdrs)
{
}
static bool_t
xdrmem_getlong_aligned (XDR * xdrs,
long *lp)
{
if (xdrs->x_handy < sizeof (int32_t))
return FALSE;
xdrs->x_handy -= sizeof (int32_t);
*lp = (int32_t) ntohl (*(u_int32_t *) xdrs->x_private);
xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
return TRUE;
}
static bool_t
xdrmem_putlong_aligned (XDR * xdrs,
const long *lp)
{
if (xdrs->x_handy < sizeof (int32_t))
return FALSE;
xdrs->x_handy -= sizeof (int32_t);
*(u_int32_t *) xdrs->x_private = htonl ((u_int32_t) * lp);
xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
return TRUE;
}
static bool_t
xdrmem_getlong_unaligned (XDR * xdrs,
long *lp)
{
u_int32_t l;
if (xdrs->x_handy < sizeof (int32_t))
return FALSE;
xdrs->x_handy -= sizeof (int32_t);
memmove (&l, xdrs->x_private, sizeof (int32_t));
*lp = ntohl (l);
xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
return TRUE;
}
static bool_t
xdrmem_putlong_unaligned (XDR * xdrs,
const long *lp)
{
u_int32_t l;
if (xdrs->x_handy < sizeof (int32_t))
return FALSE;
xdrs->x_handy -= sizeof (int32_t);
l = htonl ((u_int32_t) * lp);
memmove (xdrs->x_private, &l, sizeof (int32_t));
xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
return TRUE;
}
static bool_t
xdrmem_getbytes (XDR * xdrs,
char *addr,
u_int len)
{
if (xdrs->x_handy < len)
return FALSE;
xdrs->x_handy -= len;
memmove (addr, xdrs->x_private, len);
xdrs->x_private = (char *) xdrs->x_private + len;
return TRUE;
}
static bool_t
xdrmem_putbytes (XDR * xdrs,
const char *addr,
u_int len)
{
if (xdrs->x_handy < len)
return FALSE;
xdrs->x_handy -= len;
memmove (xdrs->x_private, addr, len);
xdrs->x_private = (char *) xdrs->x_private + len;
return TRUE;
}
static u_int
xdrmem_getpos (XDR * xdrs)
{
/* XXX w/64-bit pointers, u_int not enough! */
return (u_int) ((u_long) xdrs->x_private - (u_long) xdrs->x_base);
}
static bool_t
xdrmem_setpos (XDR * xdrs,
u_int pos)
{
caddr_t newaddr = xdrs->x_base + pos;
caddr_t lastaddr = (caddr_t) xdrs->x_private + xdrs->x_handy;
size_t handy = lastaddr - newaddr;
if (newaddr > lastaddr
|| newaddr < xdrs->x_base
|| handy != (u_int) handy)
return FALSE;
xdrs->x_private = newaddr;
xdrs->x_handy = (u_int) handy;
/* XXX sizeof(u_int) <? sizeof(ptrdiff_t) */
return TRUE;
}
static int32_t *
xdrmem_inline_aligned (XDR * xdrs,
u_int len)
{
int32_t *buf = 0;
if (xdrs->x_handy >= len)
{
xdrs->x_handy -= len;
buf = (int32_t *) xdrs->x_private;
xdrs->x_private = (char *) xdrs->x_private + len;
}
return (buf);
}
static int32_t *
xdrmem_inline_unaligned (XDR * xdrs,
u_int len)
{
return (0);
}
static bool_t
xdrmem_getint32_aligned (XDR *xdrs,
int32_t *ip)
{
if (xdrs->x_handy < sizeof(int32_t))
return FALSE;
xdrs->x_handy -= sizeof(int32_t);
*ip = (int32_t) ntohl (*(u_int32_t *) xdrs->x_private);
xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
return TRUE;
}
static bool_t
xdrmem_putint32_aligned (XDR *xdrs,
const int32_t *ip)
{
if (xdrs->x_handy < sizeof(int32_t))
return FALSE;
xdrs->x_handy -= sizeof(int32_t);
*(u_int32_t *) xdrs->x_private = htonl ((u_int32_t) * ip);
xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
return TRUE;
}
static bool_t
xdrmem_getint32_unaligned (XDR *xdrs,
int32_t *ip)
{
u_int32_t l;
if (xdrs->x_handy < sizeof(int32_t))
return FALSE;
xdrs->x_handy -= sizeof(int32_t);
memmove (&l, xdrs->x_private, sizeof (int32_t));
*ip = (int32_t) ntohl (l);
xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
return TRUE;
}
static bool_t
xdrmem_putint32_unaligned (XDR *xdrs,
const int32_t *ip)
{
u_int32_t l;
if (xdrs->x_handy < sizeof(int32_t))
return FALSE;
xdrs->x_handy -= sizeof(int32_t);
l = htonl ((u_int32_t) * ip);
memmove (xdrs->x_private, &l, sizeof (int32_t));
xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
return TRUE;
}