190 lines
4.5 KiB
C
190 lines
4.5 KiB
C
/* $NetBSD: xdr_mem.c,v 1.3 1995/02/25 03:02:07 cgd Exp $ */
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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/*static char *sccsid = "from: @(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro";*/
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/*static char *sccsid = "from: @(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC";*/
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static char *rcsid = "$NetBSD: xdr_mem.c,v 1.3 1995/02/25 03:02:07 cgd Exp $";
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#endif
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/*
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* xdr_mem.h, XDR implementation using memory buffers.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*
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* If you have some data to be interpreted as external data representation
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* or to be converted to external data representation in a memory buffer,
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* then this is the package for you.
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*
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*/
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#include <netinet/in.h>
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static bool_t xdrmem_getlong();
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static bool_t xdrmem_putlong();
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static bool_t xdrmem_getbytes();
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static bool_t xdrmem_putbytes();
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static u_int xdrmem_getpos(); /* XXX w/64-bit pointers, u_int not enough! */
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static bool_t xdrmem_setpos();
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static int32_t *xdrmem_inline();
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static void xdrmem_destroy();
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static struct xdr_ops xdrmem_ops = {
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xdrmem_getlong,
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xdrmem_putlong,
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xdrmem_getbytes,
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xdrmem_putbytes,
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xdrmem_getpos,
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xdrmem_setpos,
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xdrmem_inline,
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xdrmem_destroy
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};
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/*
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* The procedure xdrmem_create initializes a stream descriptor for a
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* memory buffer.
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*/
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void
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xdrmem_create(xdrs, addr, size, op)
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register XDR *xdrs;
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caddr_t addr;
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u_int size;
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enum xdr_op op;
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{
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xdrs->x_op = op;
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xdrs->x_ops = &xdrmem_ops;
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xdrs->x_private = xdrs->x_base = addr;
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xdrs->x_handy = size;
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}
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static void
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xdrmem_destroy(/*xdrs*/)
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/*XDR *xdrs;*/
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{
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}
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static bool_t
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xdrmem_getlong(xdrs, lp)
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register XDR *xdrs;
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long *lp;
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{
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if ((xdrs->x_handy -= sizeof(int32_t)) < 0)
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return (FALSE);
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*lp = (long)ntohl((u_int32_t)(*((int32_t *)(xdrs->x_private))));
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xdrs->x_private += sizeof(int32_t);
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return (TRUE);
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}
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static bool_t
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xdrmem_putlong(xdrs, lp)
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register XDR *xdrs;
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long *lp;
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{
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if ((xdrs->x_handy -= sizeof(int32_t)) < 0)
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return (FALSE);
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*(int32_t *)xdrs->x_private = (int32_t)htonl((int32_t)(*lp));
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xdrs->x_private += sizeof(int32_t);
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return (TRUE);
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}
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static bool_t
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xdrmem_getbytes(xdrs, addr, len)
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register XDR *xdrs;
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caddr_t addr;
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register u_int len;
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{
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if ((xdrs->x_handy -= len) < 0)
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return (FALSE);
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bcopy(xdrs->x_private, addr, len);
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xdrs->x_private += len;
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return (TRUE);
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}
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static bool_t
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xdrmem_putbytes(xdrs, addr, len)
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register XDR *xdrs;
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caddr_t addr;
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register u_int len;
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{
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if ((xdrs->x_handy -= len) < 0)
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return (FALSE);
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bcopy(addr, xdrs->x_private, len);
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xdrs->x_private += len;
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return (TRUE);
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}
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static u_int
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xdrmem_getpos(xdrs)
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register XDR *xdrs;
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{
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/* XXX w/64-bit pointers, u_int not enough! */
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return ((u_long)xdrs->x_private - (u_long)xdrs->x_base);
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}
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static bool_t
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xdrmem_setpos(xdrs, pos)
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register XDR *xdrs;
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u_int pos;
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{
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register caddr_t newaddr = xdrs->x_base + pos;
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register caddr_t lastaddr = xdrs->x_private + xdrs->x_handy;
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if ((long)newaddr > (long)lastaddr)
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return (FALSE);
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xdrs->x_private = newaddr;
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xdrs->x_handy = (long)lastaddr - (long)newaddr;
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return (TRUE);
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}
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static int32_t *
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xdrmem_inline(xdrs, len)
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register XDR *xdrs;
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int len;
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{
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int32_t *buf = 0;
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if (xdrs->x_handy >= len) {
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xdrs->x_handy -= len;
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buf = (int32_t *) xdrs->x_private;
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xdrs->x_private += len;
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}
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return (buf);
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}
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