xdr_stdio.c revision 1.8
1 /* $NetBSD: xdr_stdio.c,v 1.8 1998/02/12 01:57:56 lukem 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 1.8 1998/02/12 01:57:56 lukem 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 #include <rpc/types.h> 54 #include <stdio.h> 55 #include <rpc/xdr.h> 56 57 #ifdef __weak_alias 58 __weak_alias(xdrstdio_create,_xdrstdio_create); 59 #endif 60 61 static void xdrstdio_destroy __P((XDR *)); 62 static bool_t xdrstdio_getlong __P((XDR *, long *)); 63 static bool_t xdrstdio_putlong __P((XDR *, long *)); 64 static bool_t xdrstdio_getbytes __P((XDR *, caddr_t, u_int)); 65 static bool_t xdrstdio_putbytes __P((XDR *, caddr_t, u_int)); 66 static u_int xdrstdio_getpos __P((XDR *)); 67 static bool_t xdrstdio_setpos __P((XDR *, u_int)); 68 static int32_t *xdrstdio_inline __P((XDR *, u_int)); 69 70 /* 71 * Ops vector for stdio type XDR 72 */ 73 static struct xdr_ops xdrstdio_ops = { 74 xdrstdio_getlong, /* deseraialize a long int */ 75 xdrstdio_putlong, /* seraialize a long int */ 76 xdrstdio_getbytes, /* deserialize counted bytes */ 77 xdrstdio_putbytes, /* serialize counted bytes */ 78 xdrstdio_getpos, /* get offset in the stream */ 79 xdrstdio_setpos, /* set offset in the stream */ 80 xdrstdio_inline, /* prime stream for inline macros */ 81 xdrstdio_destroy /* destroy stream */ 82 }; 83 84 /* 85 * Initialize a stdio xdr stream. 86 * Sets the xdr stream handle xdrs for use on the stream file. 87 * Operation flag is set to op. 88 */ 89 void 90 xdrstdio_create(xdrs, file, op) 91 register XDR *xdrs; 92 FILE *file; 93 enum xdr_op op; 94 { 95 96 xdrs->x_op = op; 97 xdrs->x_ops = &xdrstdio_ops; 98 xdrs->x_private = (caddr_t)file; 99 xdrs->x_handy = 0; 100 xdrs->x_base = 0; 101 } 102 103 /* 104 * Destroy a stdio xdr stream. 105 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. 106 */ 107 static void 108 xdrstdio_destroy(xdrs) 109 register XDR *xdrs; 110 { 111 (void)fflush((FILE *)xdrs->x_private); 112 /* xx should we close the file ?? */ 113 }; 114 115 static bool_t 116 xdrstdio_getlong(xdrs, lp) 117 XDR *xdrs; 118 register long *lp; 119 { 120 121 if (fread((caddr_t)lp, sizeof(int32_t), 1, 122 (FILE *)xdrs->x_private) != 1) 123 return (FALSE); 124 *lp = (long)ntohl((int32_t)*lp); 125 return (TRUE); 126 } 127 128 static bool_t 129 xdrstdio_putlong(xdrs, lp) 130 XDR *xdrs; 131 long *lp; 132 { 133 long mycopy = (long)htonl((int32_t)*lp); 134 135 if (fwrite((caddr_t)&mycopy, sizeof(int32_t), 1, 136 (FILE *)xdrs->x_private) != 1) 137 return (FALSE); 138 return (TRUE); 139 } 140 141 static bool_t 142 xdrstdio_getbytes(xdrs, addr, len) 143 XDR *xdrs; 144 caddr_t addr; 145 u_int len; 146 { 147 148 if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 149 return (FALSE); 150 return (TRUE); 151 } 152 153 static bool_t 154 xdrstdio_putbytes(xdrs, addr, len) 155 XDR *xdrs; 156 caddr_t addr; 157 u_int len; 158 { 159 160 if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 161 return (FALSE); 162 return (TRUE); 163 } 164 165 static u_int 166 xdrstdio_getpos(xdrs) 167 XDR *xdrs; 168 { 169 170 return ((u_int) ftell((FILE *)xdrs->x_private)); 171 } 172 173 static bool_t 174 xdrstdio_setpos(xdrs, pos) 175 XDR *xdrs; 176 u_int pos; 177 { 178 179 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 180 FALSE : TRUE); 181 } 182 183 static int32_t * 184 xdrstdio_inline(xdrs, len) 185 XDR *xdrs; 186 u_int len; 187 { 188 189 /* 190 * Must do some work to implement this: must insure 191 * enough data in the underlying stdio buffer, 192 * that the buffer is aligned so that we can indirect through a 193 * long *, and stuff this pointer in xdrs->x_buf. Doing 194 * a fread or fwrite to a scratch buffer would defeat 195 * most of the gains to be had here and require storage 196 * management on this buffer, so we don't do this. 197 */ 198 return (NULL); 199 } 200
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