rpc.subproj/xdr_stdio.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  27  * unrestricted use provided that this legend is included on all tape
  28  * media and as a part of the software program in whole or part.  Users
  29  * may copy or modify Sun RPC without charge, but are not authorized
  30  * to license or distribute it to anyone else except as part of a product or
  31  * program developed by the user.
  32  *
  33  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  34  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  35  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  36  *
  37  * Sun RPC is provided with no support and without any obligation on the
  38  * part of Sun Microsystems, Inc. to assist in its use, correction,
  39  * modification or enhancement.
  40  *
  41  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  42  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  43  * OR ANY PART THEREOF.
  44  *
  45  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  46  * or profits or other special, indirect and consequential damages, even if
  47  * Sun has been advised of the possibility of such damages.
  48  *
  49  * Sun Microsystems, Inc.
  50  * 2550 Garcia Avenue
  51  * Mountain View, California  94043
  52  */
  53
  54 #if defined(LIBC_SCCS) && !defined(lint)
  55 /*static char *sccsid = "from: @(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro";*/
  56 /*static char *sccsid = "from: @(#)xdr_stdio.c  2.1 88/07/29 4.0 RPCSRC";*/
  57 static char *rcsid = "$Id: xdr_stdio.c,v 1.2 1999/10/14 21:56:55 wsanchez Exp $";
  58 #endif
  59
  60 /*
  61  * xdr_stdio.c, XDR implementation on standard i/o file.
  62  *
  63  * Copyright (C) 1984, Sun Microsystems, Inc.
  64  *
  65  * This set of routines implements a XDR on a stdio stream.
  66  * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes
  67  * from the stream.
  68  */
  69
  70 #include <rpc/types.h>
  71 #include <stdio.h>
  72 #include <rpc/xdr.h>
  73
  74 static bool_t   xdrstdio_getlong();
  75 static bool_t   xdrstdio_putlong();
  76 static bool_t   xdrstdio_getbytes();
  77 static bool_t   xdrstdio_putbytes();
  78 static u_int    xdrstdio_getpos();
  79 static bool_t   xdrstdio_setpos();
  80 static long *   xdrstdio_inline();
  81 static void     xdrstdio_destroy();
  82
  83 /*
  84  * Ops vector for stdio type XDR
  85  */
  86 static struct xdr_ops   xdrstdio_ops = {
  87         xdrstdio_getlong,       /* deseraialize a long int */
  88         xdrstdio_putlong,       /* seraialize a long int */
  89         xdrstdio_getbytes,      /* deserialize counted bytes */
  90         xdrstdio_putbytes,      /* serialize counted bytes */
  91         xdrstdio_getpos,        /* get offset in the stream */
  92         xdrstdio_setpos,        /* set offset in the stream */
  93         xdrstdio_inline,        /* prime stream for inline macros */
  94         xdrstdio_destroy        /* destroy stream */
  95 };
  96
  97 /*
  98  * Initialize a stdio xdr stream.
  99  * Sets the xdr stream handle xdrs for use on the stream file.
 100  * Operation flag is set to op.
 101  */
 102 void
 103 xdrstdio_create(xdrs, file, op)
 104         register XDR *xdrs;
 105         FILE *file;
 106         enum xdr_op op;
 107 {
 108
 109         xdrs->x_op = op;
 110         xdrs->x_ops = &xdrstdio_ops;
 111         xdrs->x_private = (caddr_t)file;
 112         xdrs->x_handy = 0;
 113         xdrs->x_base = 0;
 114 }
 115
 116 /*
 117  * Destroy a stdio xdr stream.
 118  * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
 119  */
 120 static void
 121 xdrstdio_destroy(xdrs)
 122         register XDR *xdrs;
 123 {
 124         (void)fflush((FILE *)xdrs->x_private);
 125         /* xx should we close the file ?? */
 126 };
 127
 128 static bool_t
 129 xdrstdio_getlong(xdrs, lp)
 130         XDR *xdrs;
 131         register long *lp;
 132 {
 133
 134         if (fread((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1)
 135                 return (FALSE);
 136 #ifndef mc68000
 137         *lp = ntohl(*lp);
 138 #endif
 139         return (TRUE);
 140 }
 141
 142 static bool_t
 143 xdrstdio_putlong(xdrs, lp)
 144         XDR *xdrs;
 145         long *lp;
 146 {
 147
 148 #ifndef mc68000
 149         long mycopy = htonl(*lp);
 150         lp = &mycopy;
 151 #endif
 152         if (fwrite((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1)
 153                 return (FALSE);
 154         return (TRUE);
 155 }
 156
 157 static bool_t
 158 xdrstdio_getbytes(xdrs, addr, len)
 159         XDR *xdrs;
 160         caddr_t addr;
 161         u_int len;
 162 {
 163
 164         if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
 165                 return (FALSE);
 166         return (TRUE);
 167 }
 168
 169 static bool_t
 170 xdrstdio_putbytes(xdrs, addr, len)
 171         XDR *xdrs;
 172         caddr_t addr;
 173         u_int len;
 174 {
 175
 176         if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
 177                 return (FALSE);
 178         return (TRUE);
 179 }
 180
 181 static u_int
 182 xdrstdio_getpos(xdrs)
 183         XDR *xdrs;
 184 {
 185
 186         return ((u_int) ftell((FILE *)xdrs->x_private));
 187 }
 188
 189 static bool_t
 190 xdrstdio_setpos(xdrs, pos)
 191         XDR *xdrs;
 192         u_int pos;
 193 {
 194
 195         return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ?
 196                 FALSE : TRUE);
 197 }
 198
 199 static long *
 200 xdrstdio_inline(xdrs, len)
 201         XDR *xdrs;
 202         u_int len;
 203 {
 204
 205         /*
 206          * Must do some work to implement this: must insure
 207          * enough data in the underlying stdio buffer,
 208          * that the buffer is aligned so that we can indirect through a
 209          * long *, and stuff this pointer in xdrs->x_buf.  Doing
 210          * a fread or fwrite to a scratch buffer would defeat
 211          * most of the gains to be had here and require storage
 212          * management on this buffer, so we don't do this.
 213          */
 214         return (NULL);
 215 }