190 lines
4.6 KiB
C
190 lines
4.6 KiB
C
/* @(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC */
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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(lint) && defined(SCCSIDS)
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static char sccsid[] = "@(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro";
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#endif
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/*
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* xdr_stdio.c, XDR implementation on standard i/o file.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*
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* This set of routines implements a XDR on a stdio stream.
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* XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes
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* from the stream.
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*/
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#include <rpc/types.h>
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#include <stdio.h>
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#include <rpc/xdr.h>
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static bool_t xdrstdio_getlong();
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static bool_t xdrstdio_putlong();
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static bool_t xdrstdio_getbytes();
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static bool_t xdrstdio_putbytes();
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static u_int xdrstdio_getpos();
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static bool_t xdrstdio_setpos();
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static long * xdrstdio_inline();
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static void xdrstdio_destroy();
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/*
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* Ops vector for stdio type XDR
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*/
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static struct xdr_ops xdrstdio_ops = {
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xdrstdio_getlong, /* deseraialize a long int */
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xdrstdio_putlong, /* seraialize a long int */
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xdrstdio_getbytes, /* deserialize counted bytes */
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xdrstdio_putbytes, /* serialize counted bytes */
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xdrstdio_getpos, /* get offset in the stream */
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xdrstdio_setpos, /* set offset in the stream */
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xdrstdio_inline, /* prime stream for inline macros */
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xdrstdio_destroy /* destroy stream */
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};
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/*
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* Initialize a stdio xdr stream.
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* Sets the xdr stream handle xdrs for use on the stream file.
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* Operation flag is set to op.
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*/
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void
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xdrstdio_create(xdrs, file, op)
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register XDR *xdrs;
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FILE *file;
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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 = &xdrstdio_ops;
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xdrs->x_private = (caddr_t)file;
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xdrs->x_handy = 0;
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xdrs->x_base = 0;
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}
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/*
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* Destroy a stdio xdr stream.
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* Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
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*/
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static void
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xdrstdio_destroy(xdrs)
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register XDR *xdrs;
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{
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(void)fflush((FILE *)xdrs->x_private);
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/* xx should we close the file ?? */
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};
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static bool_t
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xdrstdio_getlong(xdrs, lp)
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XDR *xdrs;
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register long *lp;
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{
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if (fread((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1)
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return (FALSE);
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#ifndef mc68000
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*lp = ntohl(*lp);
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#endif
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return (TRUE);
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}
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static bool_t
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xdrstdio_putlong(xdrs, lp)
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XDR *xdrs;
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long *lp;
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{
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#ifndef mc68000
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long mycopy = htonl(*lp);
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lp = &mycopy;
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#endif
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if (fwrite((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1)
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return (FALSE);
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return (TRUE);
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}
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static bool_t
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xdrstdio_getbytes(xdrs, addr, len)
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XDR *xdrs;
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caddr_t addr;
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u_int len;
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{
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if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
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return (FALSE);
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return (TRUE);
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}
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static bool_t
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xdrstdio_putbytes(xdrs, addr, len)
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XDR *xdrs;
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caddr_t addr;
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u_int len;
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{
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if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
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return (FALSE);
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return (TRUE);
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}
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static u_int
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xdrstdio_getpos(xdrs)
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XDR *xdrs;
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{
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return ((u_int) ftell((FILE *)xdrs->x_private));
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}
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static bool_t
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xdrstdio_setpos(xdrs, pos)
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XDR *xdrs;
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u_int pos;
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{
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return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ?
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FALSE : TRUE);
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}
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static long *
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xdrstdio_inline(xdrs, len)
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XDR *xdrs;
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u_int len;
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{
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/*
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* Must do some work to implement this: must insure
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* enough data in the underlying stdio buffer,
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* that the buffer is aligned so that we can indirect through a
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* long *, and stuff this pointer in xdrs->x_buf. Doing
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* a fread or fwrite to a scratch buffer would defeat
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* most of the gains to be had here and require storage
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* management on this buffer, so we don't do this.
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*/
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return (NULL);
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}
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