1 /* $NetBSD: xdr_stdio.c,v 1.19 2013/03/11 20:19:30 tron 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 1.19 2013/03/11 20:19:30 tron 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(XDR *); 66 static bool_t xdrstdio_getlong(XDR *, long *); 67 static bool_t xdrstdio_putlong(XDR *, const long *); 68 static bool_t xdrstdio_getbytes(XDR *, char *, u_int); 69 static bool_t xdrstdio_putbytes(XDR *, const char *, u_int); 70 static u_int xdrstdio_getpos(XDR *); 71 static bool_t xdrstdio_setpos(XDR *, u_int); 72 static int32_t *xdrstdio_inline(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(XDR *xdrs, FILE *file, enum xdr_op op) 96 { 97 98 xdrs->x_op = op; 99 xdrs->x_ops = &xdrstdio_ops; 100 xdrs->x_private = file; 101 xdrs->x_handy = 0; 102 xdrs->x_base = 0; 103 } 104 105 /* 106 * Destroy a stdio xdr stream. 107 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. 108 */ 109 static void 110 xdrstdio_destroy(XDR *xdrs) 111 { 112 (void)fflush((FILE *)xdrs->x_private); 113 /* XXX: should we close the file ?? */ 114 } 115 116 static bool_t 117 xdrstdio_getlong(XDR *xdrs, long *lp) 118 { 119 u_int32_t temp; 120 121 if (fread(&temp, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 122 return (FALSE); 123 *lp = (long)ntohl(temp); 124 return (TRUE); 125 } 126 127 static bool_t 128 xdrstdio_putlong(XDR *xdrs, const long *lp) 129 { 130 int32_t mycopy = htonl((u_int32_t)*lp); 131 132 if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 133 return (FALSE); 134 return (TRUE); 135 } 136 137 static bool_t 138 xdrstdio_getbytes(XDR *xdrs, char *addr, u_int len) 139 { 140 141 if ((len != 0) && (fread(addr, (size_t)len, 1, (FILE *)xdrs->x_private) != 1)) 142 return (FALSE); 143 return (TRUE); 144 } 145 146 static bool_t 147 xdrstdio_putbytes(XDR *xdrs, const char *addr, u_int len) 148 { 149 150 if ((len != 0) && (fwrite(addr, (size_t)len, 1, 151 (FILE *)xdrs->x_private) != 1)) 152 return (FALSE); 153 return (TRUE); 154 } 155 156 static u_int 157 xdrstdio_getpos(XDR *xdrs) 158 { 159 160 return ((u_int) ftell((FILE *)xdrs->x_private)); 161 } 162 163 static bool_t 164 xdrstdio_setpos(XDR *xdrs, u_int pos) 165 { 166 167 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 168 FALSE : TRUE); 169 } 170 171 /* ARGSUSED */ 172 static int32_t * 173 xdrstdio_inline(XDR *xdrs, u_int len) 174 { 175 176 /* 177 * Must do some work to implement this: must insure 178 * enough data in the underlying stdio buffer, 179 * that the buffer is aligned so that we can indirect through a 180 * long *, and stuff this pointer in xdrs->x_buf. Doing 181 * a fread or fwrite to a scratch buffer would defeat 182 * most of the gains to be had here and require storage 183 * management on this buffer, so we don't do this. 184 */ 185 return (NULL); 186 } 187
Indexes created Wed Sep 24 15:09:51 GMT 2025