xdr_stdio.c revision 1.17.44.1
1 /* $NetBSD: xdr_stdio.c,v 1.17.44.1 2013/03/14 22:03:14 riz Exp $ */ 2 3 /* 4 * Copyright (c) 2010, Oracle America, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above 13 * copyright notice, this list of conditions and the following 14 * disclaimer in the documentation and/or other materials 15 * provided with the distribution. 16 * * Neither the name of the "Oracle America, Inc." nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 #if defined(LIBC_SCCS) && !defined(lint) 36 #if 0 37 static char *sccsid = "@(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro"; 38 static char *sccsid = "@(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC"; 39 #else 40 __RCSID("$NetBSD: xdr_stdio.c,v 1.17.44.1 2013/03/14 22:03:14 riz Exp $"); 41 #endif 42 #endif 43 44 /* 45 * xdr_stdio.c, XDR implementation on standard i/o file. 46 * 47 * Copyright (C) 1984, Sun Microsystems, Inc. 48 * 49 * This set of routines implements a XDR on a stdio stream. 50 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes 51 * from the stream. 52 */ 53 54 #include "namespace.h" 55 56 #include <stdio.h> 57 58 #include <rpc/types.h> 59 #include <rpc/xdr.h> 60 61 #ifdef __weak_alias 62 __weak_alias(xdrstdio_create,_xdrstdio_create) 63 #endif 64 65 static void xdrstdio_destroy __P((XDR *)); 66 static bool_t xdrstdio_getlong __P((XDR *, long *)); 67 static bool_t xdrstdio_putlong __P((XDR *, const long *)); 68 static bool_t xdrstdio_getbytes __P((XDR *, char *, u_int)); 69 static bool_t xdrstdio_putbytes __P((XDR *, const char *, u_int)); 70 static u_int xdrstdio_getpos __P((XDR *)); 71 static bool_t xdrstdio_setpos __P((XDR *, u_int)); 72 static int32_t *xdrstdio_inline __P((XDR *, u_int)); 73 74 /* 75 * Ops vector for stdio type XDR 76 */ 77 static const struct xdr_ops xdrstdio_ops = { 78 xdrstdio_getlong, /* deseraialize a long int */ 79 xdrstdio_putlong, /* seraialize a long int */ 80 xdrstdio_getbytes, /* deserialize counted bytes */ 81 xdrstdio_putbytes, /* serialize counted bytes */ 82 xdrstdio_getpos, /* get offset in the stream */ 83 xdrstdio_setpos, /* set offset in the stream */ 84 xdrstdio_inline, /* prime stream for inline macros */ 85 xdrstdio_destroy, /* destroy stream */ 86 NULL, /* xdrstdio_control */ 87 }; 88 89 /* 90 * Initialize a stdio xdr stream. 91 * Sets the xdr stream handle xdrs for use on the stream file. 92 * Operation flag is set to op. 93 */ 94 void 95 xdrstdio_create(xdrs, file, op) 96 XDR *xdrs; 97 FILE *file; 98 enum xdr_op op; 99 { 100 101 xdrs->x_op = op; 102 xdrs->x_ops = &xdrstdio_ops; 103 xdrs->x_private = file; 104 xdrs->x_handy = 0; 105 xdrs->x_base = 0; 106 } 107 108 /* 109 * Destroy a stdio xdr stream. 110 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. 111 */ 112 static void 113 xdrstdio_destroy(xdrs) 114 XDR *xdrs; 115 { 116 (void)fflush((FILE *)xdrs->x_private); 117 /* XXX: should we close the file ?? */ 118 } 119 120 static bool_t 121 xdrstdio_getlong(xdrs, lp) 122 XDR *xdrs; 123 long *lp; 124 { 125 u_int32_t temp; 126 127 if (fread(&temp, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 128 return (FALSE); 129 *lp = (long)ntohl(temp); 130 return (TRUE); 131 } 132 133 static bool_t 134 xdrstdio_putlong(xdrs, lp) 135 XDR *xdrs; 136 const long *lp; 137 { 138 int32_t mycopy = htonl((u_int32_t)*lp); 139 140 if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 141 return (FALSE); 142 return (TRUE); 143 } 144 145 static bool_t 146 xdrstdio_getbytes(xdrs, addr, len) 147 XDR *xdrs; 148 char *addr; 149 u_int len; 150 { 151 152 if ((len != 0) && (fread(addr, (size_t)len, 1, (FILE *)xdrs->x_private) != 1)) 153 return (FALSE); 154 return (TRUE); 155 } 156 157 static bool_t 158 xdrstdio_putbytes(xdrs, addr, len) 159 XDR *xdrs; 160 const char *addr; 161 u_int len; 162 { 163 164 if ((len != 0) && (fwrite(addr, (size_t)len, 1, 165 (FILE *)xdrs->x_private) != 1)) 166 return (FALSE); 167 return (TRUE); 168 } 169 170 static u_int 171 xdrstdio_getpos(xdrs) 172 XDR *xdrs; 173 { 174 175 return ((u_int) ftell((FILE *)xdrs->x_private)); 176 } 177 178 static bool_t 179 xdrstdio_setpos(xdrs, pos) 180 XDR *xdrs; 181 u_int pos; 182 { 183 184 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 185 FALSE : TRUE); 186 } 187 188 /* ARGSUSED */ 189 static int32_t * 190 xdrstdio_inline(xdrs, len) 191 XDR *xdrs; 192 u_int len; 193 { 194 195 /* 196 * Must do some work to implement this: must insure 197 * enough data in the underlying stdio buffer, 198 * that the buffer is aligned so that we can indirect through a 199 * long *, and stuff this pointer in xdrs->x_buf. Doing 200 * a fread or fwrite to a scratch buffer would defeat 201 * most of the gains to be had here and require storage 202 * management on this buffer, so we don't do this. 203 */ 204 return (NULL); 205 } 206
Indexes created Tue Sep 30 06:09:59 GMT 2025