1 /* $NetBSD: xdr_stdio.c,v 1.14 2000/01/22 22:19:19 mycroft Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 /*static char *sccsid = "from: @(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro";*/ 35 /*static char *sccsid = "from: @(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC";*/ 36 static char *rcsid = "$FreeBSD$"; 37 #endif 38 39 /* 40 * xdr_stdio.c, XDR implementation on standard i/o file. 41 * 42 * Copyright (C) 1984, Sun Microsystems, Inc. 43 * 44 * This set of routines implements a XDR on a stdio stream. 45 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes 46 * from the stream. 47 */ 48 49 #include "namespace.h" 50 #include <stdio.h> 51 52 #include <rpc/types.h> 53 #include <rpc/xdr.h> 54 #include "un-namespace.h" 55 56 static void xdrstdio_destroy __P((XDR *)); 57 static bool_t xdrstdio_getlong __P((XDR *, long *)); 58 static bool_t xdrstdio_putlong __P((XDR *, const long *)); 59 static bool_t xdrstdio_getbytes __P((XDR *, char *, u_int)); 60 static bool_t xdrstdio_putbytes __P((XDR *, const char *, u_int)); 61 static u_int xdrstdio_getpos __P((XDR *)); 62 static bool_t xdrstdio_setpos __P((XDR *, u_int)); 63 static int32_t *xdrstdio_inline __P((XDR *, u_int)); 64 65 /* 66 * Ops vector for stdio type XDR 67 */ 68 static const struct xdr_ops xdrstdio_ops = { 69 xdrstdio_getlong, /* deseraialize a long int */ 70 xdrstdio_putlong, /* seraialize a long int */ 71 xdrstdio_getbytes, /* deserialize counted bytes */ 72 xdrstdio_putbytes, /* serialize counted bytes */ 73 xdrstdio_getpos, /* get offset in the stream */ 74 xdrstdio_setpos, /* set offset in the stream */ 75 xdrstdio_inline, /* prime stream for inline macros */ 76 xdrstdio_destroy /* destroy stream */ 77 }; 78 79 /* 80 * Initialize a stdio xdr stream. 81 * Sets the xdr stream handle xdrs for use on the stream file. 82 * Operation flag is set to op. 83 */ 84 void 85 xdrstdio_create(xdrs, file, op) 86 XDR *xdrs; 87 FILE *file; 88 enum xdr_op op; 89 { 90 91 xdrs->x_op = op; 92 xdrs->x_ops = &xdrstdio_ops; 93 xdrs->x_private = file; 94 xdrs->x_handy = 0; 95 xdrs->x_base = 0; 96 } 97 98 /* 99 * Destroy a stdio xdr stream. 100 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. 101 */ 102 static void 103 xdrstdio_destroy(xdrs) 104 XDR *xdrs; 105 { 106 (void)fflush((FILE *)xdrs->x_private); 107 /* XXX: should we close the file ?? */ 108 } 109 110 static bool_t 111 xdrstdio_getlong(xdrs, lp) 112 XDR *xdrs; 113 long *lp; 114 { 115 116 if (fread(lp, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 117 return (FALSE); 118 *lp = (long)ntohl((u_int32_t)*lp); 119 return (TRUE); 120 } 121 122 static bool_t 123 xdrstdio_putlong(xdrs, lp) 124 XDR *xdrs; 125 const long *lp; 126 { 127 long mycopy = (long)htonl((u_int32_t)*lp); 128 129 if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 130 return (FALSE); 131 return (TRUE); 132 } 133 134 static bool_t 135 xdrstdio_getbytes(xdrs, addr, len) 136 XDR *xdrs; 137 char *addr; 138 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(xdrs, addr, len) 148 XDR *xdrs; 149 const char *addr; 150 u_int len; 151 { 152 153 if ((len != 0) && (fwrite(addr, (size_t)len, 1, 154 (FILE *)xdrs->x_private) != 1)) 155 return (FALSE); 156 return (TRUE); 157 } 158 159 static u_int 160 xdrstdio_getpos(xdrs) 161 XDR *xdrs; 162 { 163 164 return ((u_int) ftell((FILE *)xdrs->x_private)); 165 } 166 167 static bool_t 168 xdrstdio_setpos(xdrs, pos) 169 XDR *xdrs; 170 u_int pos; 171 { 172 173 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 174 FALSE : TRUE); 175 } 176 177 /* ARGSUSED */ 178 static int32_t * 179 xdrstdio_inline(xdrs, len) 180 XDR *xdrs; 181 u_int len; 182 { 183 184 /* 185 * Must do some work to implement this: must insure 186 * enough data in the underlying stdio buffer, 187 * that the buffer is aligned so that we can indirect through a 188 * long *, and stuff this pointer in xdrs->x_buf. Doing 189 * a fread or fwrite to a scratch buffer would defeat 190 * most of the gains to be had here and require storage 191 * management on this buffer, so we don't do this. 192 */ 193 return (NULL); 194 } 195