xdr_mem.c /* @(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC */ /* * 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 */ #if !defined(lint) && defined(SCCSIDS) static char sccsid[] = "@(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro"; #endif /* * 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 <rpc/types.h> #include <rpc/xdr.h> #include <netinet/in.h> #include <strings.h> static bool_t xdrmem_getlong(); static bool_t xdrmem_putlong(); static bool_t xdrmem_getbytes(); static bool_t xdrmem_putbytes(); static u_int xdrmem_getpos(); static bool_t xdrmem_setpos(); static long * xdrmem_inline(); static void xdrmem_destroy(); static struct xdr_ops xdrmem_ops = { xdrmem_getlong, xdrmem_putlong, xdrmem_getbytes, xdrmem_putbytes, xdrmem_getpos, xdrmem_setpos, xdrmem_inline, xdrmem_destroy }; /* * The procedure xdrmem_create initializes a stream descriptor for a * memory buffer. */ void xdrmem_create(xdrs, addr, size, op) register XDR *xdrs; caddr_t addr; u_int size; enum xdr_op op; { xdrs->x_op = op; xdrs->x_ops = &xdrmem_ops; xdrs->x_private = xdrs->x_base = addr; xdrs->x_handy = size; } static void xdrmem_destroy(/*xdrs*/) /*XDR *xdrs;*/ { } static bool_t xdrmem_getlong(xdrs, lp) register XDR *xdrs; long *lp; { if ((xdrs->x_handy -= sizeof(long)) < 0) return (FALSE); *lp = (long)ntohl((u_long)(*((long *)(xdrs->x_private)))); xdrs->x_private += sizeof(long); return (TRUE); } static bool_t xdrmem_putlong(xdrs, lp) register XDR *xdrs; long *lp; { if ((xdrs->x_handy -= sizeof(long)) < 0) return (FALSE); *(long *)xdrs->x_private = (long)htonl((u_long)(*lp)); xdrs->x_private += sizeof(long); return (TRUE); } static bool_t xdrmem_getbytes(xdrs, addr, len) register XDR *xdrs; caddr_t addr; register u_int len; { if ((xdrs->x_handy -= len) < 0) return (FALSE); bcopy(xdrs->x_private, addr, len); xdrs->x_private += len; return (TRUE); } static bool_t xdrmem_putbytes(xdrs, addr, len) register XDR *xdrs; caddr_t addr; register u_int len; { if ((xdrs->x_handy -= len) < 0) return (FALSE); bcopy(addr, xdrs->x_private, len); xdrs->x_private += len; return (TRUE); } static u_int xdrmem_getpos(xdrs) register XDR *xdrs; { return ((u_int)xdrs->x_private - (u_int)xdrs->x_base); } static bool_t xdrmem_setpos(xdrs, pos) register XDR *xdrs; u_int pos; { register caddr_t newaddr = xdrs->x_base + pos; register caddr_t lastaddr = xdrs->x_private + xdrs->x_handy; if ((long)newaddr > (long)lastaddr) return (FALSE); xdrs->x_private = newaddr; xdrs->x_handy = (int)lastaddr - (int)newaddr; return (TRUE); } static long * xdrmem_inline(xdrs, len) register XDR *xdrs; int len; { long *buf = 0; if (xdrs->x_handy >= len) { xdrs->x_handy -= len; buf = (long *) xdrs->x_private; xdrs->x_private += len; } return (buf); }