xdr_stdio.c revision 1.10
1 /* $NetBSD: xdr_stdio.c,v 1.10 1998/07/26 11:38:24 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 #if 0 35 static char *sccsid = "@(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro"; 36 static char *sccsid = "@(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC"; 37 #else 38 __RCSID("$NetBSD: xdr_stdio.c,v 1.10 1998/07/26 11:38:24 mycroft Exp $"); 39 #endif 40 #endif 41 42 /* 43 * xdr_stdio.c, XDR implementation on standard i/o file. 44 * 45 * Copyright (C) 1984, Sun Microsystems, Inc. 46 * 47 * This set of routines implements a XDR on a stdio stream. 48 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes 49 * from the stream. 50 */ 51 52 #include "namespace.h" 53 54 #include <stdio.h> 55 56 #include <rpc/types.h> 57 #include <rpc/xdr.h> 58 59 #ifdef __weak_alias 60 __weak_alias(xdrstdio_create,_xdrstdio_create); 61 #endif 62 63 static void xdrstdio_destroy __P((XDR *)); 64 static bool_t xdrstdio_getlong __P((XDR *, long *)); 65 static bool_t xdrstdio_putlong __P((XDR *, long *)); 66 static bool_t xdrstdio_getbytes __P((XDR *, caddr_t, u_int)); 67 static bool_t xdrstdio_putbytes __P((XDR *, caddr_t, u_int)); 68 static u_int xdrstdio_getpos __P((XDR *)); 69 static bool_t xdrstdio_setpos __P((XDR *, u_int)); 70 static int32_t *xdrstdio_inline __P((XDR *, u_int)); 71 72 /* 73 * Ops vector for stdio type XDR 74 */ 75 static const struct xdr_ops xdrstdio_ops = { 76 xdrstdio_getlong, /* deseraialize a long int */ 77 xdrstdio_putlong, /* seraialize a long int */ 78 xdrstdio_getbytes, /* deserialize counted bytes */ 79 xdrstdio_putbytes, /* serialize counted bytes */ 80 xdrstdio_getpos, /* get offset in the stream */ 81 xdrstdio_setpos, /* set offset in the stream */ 82 xdrstdio_inline, /* prime stream for inline macros */ 83 xdrstdio_destroy /* destroy stream */ 84 }; 85 86 /* 87 * Initialize a stdio xdr stream. 88 * Sets the xdr stream handle xdrs for use on the stream file. 89 * Operation flag is set to op. 90 */ 91 void 92 xdrstdio_create(xdrs, file, op) 93 XDR *xdrs; 94 FILE *file; 95 enum xdr_op op; 96 { 97 98 xdrs->x_op = op; 99 xdrs->x_ops = &xdrstdio_ops; 100 xdrs->x_private = (caddr_t)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(xdrs) 111 XDR *xdrs; 112 { 113 (void)fflush((FILE *)xdrs->x_private); 114 /* xx should we close the file ?? */ 115 }; 116 117 static bool_t 118 xdrstdio_getlong(xdrs, lp) 119 XDR *xdrs; 120 long *lp; 121 { 122 123 if (fread((caddr_t)lp, sizeof(int32_t), 1, 124 (FILE *)xdrs->x_private) != 1) 125 return (FALSE); 126 *lp = (long)ntohl((int32_t)*lp); 127 return (TRUE); 128 } 129 130 static bool_t 131 xdrstdio_putlong(xdrs, lp) 132 XDR *xdrs; 133 long *lp; 134 { 135 long mycopy = (long)htonl((int32_t)*lp); 136 137 if (fwrite((caddr_t)&mycopy, sizeof(int32_t), 1, 138 (FILE *)xdrs->x_private) != 1) 139 return (FALSE); 140 return (TRUE); 141 } 142 143 static bool_t 144 xdrstdio_getbytes(xdrs, addr, len) 145 XDR *xdrs; 146 caddr_t addr; 147 u_int len; 148 { 149 150 if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 151 return (FALSE); 152 return (TRUE); 153 } 154 155 static bool_t 156 xdrstdio_putbytes(xdrs, addr, len) 157 XDR *xdrs; 158 caddr_t addr; 159 u_int len; 160 { 161 162 if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 163 return (FALSE); 164 return (TRUE); 165 } 166 167 static u_int 168 xdrstdio_getpos(xdrs) 169 XDR *xdrs; 170 { 171 172 return ((u_int) ftell((FILE *)xdrs->x_private)); 173 } 174 175 static bool_t 176 xdrstdio_setpos(xdrs, pos) 177 XDR *xdrs; 178 u_int pos; 179 { 180 181 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 182 FALSE : TRUE); 183 } 184 185 static int32_t * 186 xdrstdio_inline(xdrs, len) 187 XDR *xdrs; 188 u_int len; 189 { 190 191 /* 192 * Must do some work to implement this: must insure 193 * enough data in the underlying stdio buffer, 194 * that the buffer is aligned so that we can indirect through a 195 * long *, and stuff this pointer in xdrs->x_buf. Doing 196 * a fread or fwrite to a scratch buffer would defeat 197 * most of the gains to be had here and require storage 198 * management on this buffer, so we don't do this. 199 */ 200 return (NULL); 201 } 202
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