xdr_mem.c
上传用户:nvosite88
上传日期:2007-01-17
资源大小:4983k
文件大小:5k
- /* xdr_mem.c - XDR implementation using memory buffers */
- /* Copyright 1984-1999 Wind River Systems, Inc. */
- #include "copyright_wrs.h"
- /*
- * Copyright (C) 1984, Sun Microsystems, Inc.
- *
- * 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
- */
- /*
- modification history
- --------------------
- 01g,27jul99,elg Add xdrmem_putlongs() and xdrmem_putwords() routines.
- 01f,26may92,rrr the tree shuffle
- -changed includes to have absolute path from h/
- 01e,04oct91,rrr passed through the ansification filter
- -changed includes to have absolute path from h/
- -changed copyright notice
- 01d,19apr90,hjb de-linted.
- 01c,27oct89,hjb upgraded to 4.0
- 01b,11nov87,jlf added wrs copyright, title, mod history, etc.
- 01a,01nov87,rdc first VxWorks version
- */
- #ifndef lint
- /* static char sccsid[] = "@(#)xdr_mem.c 1.1 86/02/03 Copyr 1984 Sun Micro"; */
- #endif
- /*
- * xdr_mem.c, XDR implementation using memory buffers.
- *
- * 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/rpctypes.h"
- #include "rpc/xdr.h"
- #include "netinet/in.h"
- #include "vxWorks.h"
- LOCAL bool_t xdrmem_getlong();
- LOCAL bool_t xdrmem_putlong();
- LOCAL bool_t xdrmem_getbytes();
- LOCAL bool_t xdrmem_putbytes();
- LOCAL bool_t xdrmem_putwords();
- LOCAL bool_t xdrmem_putlongs();
- LOCAL u_int xdrmem_getpos();
- LOCAL bool_t xdrmem_setpos();
- LOCAL long * xdrmem_inline();
- LOCAL void xdrmem_destroy();
- static struct xdr_ops xdrmem_ops = {
- xdrmem_getlong,
- xdrmem_putlong,
- xdrmem_getbytes,
- xdrmem_putbytes,
- xdrmem_putwords,
- xdrmem_putlongs,
- 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;
- }
- LOCAL void /* 4.0 */
- xdrmem_destroy(/*xdrs*/)
- /*XDR *xdrs;*/
- {
- }
- LOCAL bool_t /* 4.0 */
- xdrmem_getlong(xdrs, lp)
- register XDR *xdrs;
- long *lp;
- {
- if ((xdrs->x_handy -= sizeof(long)) < 0)
- return (FALSE);
- *lp = ntohl(*((u_long *)(xdrs->x_private)));
- xdrs->x_private += sizeof(long);
- return (TRUE);
- }
- LOCAL bool_t /* 4.0 */
- xdrmem_putlong(xdrs, lp)
- register XDR *xdrs;
- long *lp;
- {
- if ((xdrs->x_handy -= sizeof(long)) < 0)
- return (FALSE);
- *(u_long *)xdrs->x_private = htonl((u_long) *lp);
- xdrs->x_private += sizeof(long);
- return (TRUE);
- }
- LOCAL bool_t /* 4.0 */
- 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, (int) len);
- xdrs->x_private += len;
- return (TRUE);
- }
- LOCAL bool_t /* 4.0 */
- 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, (int) len);
- xdrs->x_private += len;
- return (TRUE);
- }
- LOCAL bool_t /* 4.0 */
- xdrmem_putwords (xdrs, addr, len)
- register XDR * xdrs;
- caddr_t addr;
- register u_int len;
- {
- if ((xdrs->x_handy -= len * 2) < 0)
- return (FALSE);
- bcopyWords (addr, xdrs->x_private, (int) len);
- xdrs->x_private += len * 2;
- return (TRUE);
- }
- LOCAL bool_t /* 4.0 */
- xdrmem_putlongs (xdrs, addr, len)
- register XDR * xdrs;
- caddr_t addr;
- register u_int len;
- {
- if ((xdrs->x_handy -= len * 4) < 0)
- return (FALSE);
- bcopyLongs (addr, xdrs->x_private, (int) len);
- xdrs->x_private += len * 4;
- return (TRUE);
- }
- LOCAL u_int /* 4.0 */
- xdrmem_getpos(xdrs)
- register XDR *xdrs;
- {
- return ((u_int)xdrs->x_private - (u_int)xdrs->x_base);
- }
- LOCAL bool_t /* 4.0 */
- 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);
- }
- LOCAL long * /* 4.0 */
- 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);
- }