xdr_stdio.c revision 1.4
1 /* $NetBSD: xdr_stdio.c,v 1.4 1997/07/13 20:13:33 christos 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 1.4 1997/07/13 20:13:33 christos 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 <rpc/types.h> 53 #include <stdio.h> 54 #include <rpc/xdr.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 *, long *)); 59 static bool_t xdrstdio_getbytes __P((XDR *, caddr_t, u_int)); 60 static bool_t xdrstdio_putbytes __P((XDR *, caddr_t, 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 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 register 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 = (caddr_t)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 register XDR *xdrs; 105 { 106 (void)fflush((FILE *)xdrs->x_private); 107 /* xx should we close the file ?? */ 108 }; 109 110 static bool_t 111 xdrstdio_getlong(xdrs, lp) 112 XDR *xdrs; 113 register long *lp; 114 { 115 116 if (fread((caddr_t)lp, sizeof(int32_t), 1, 117 (FILE *)xdrs->x_private) != 1) 118 return (FALSE); 119 *lp = (long)ntohl((int32_t)*lp); 120 return (TRUE); 121 } 122 123 static bool_t 124 xdrstdio_putlong(xdrs, lp) 125 XDR *xdrs; 126 long *lp; 127 { 128 long mycopy = (long)htonl((int32_t)*lp); 129 130 if (fwrite((caddr_t)&mycopy, sizeof(int32_t), 1, 131 (FILE *)xdrs->x_private) != 1) 132 return (FALSE); 133 return (TRUE); 134 } 135 136 static bool_t 137 xdrstdio_getbytes(xdrs, addr, len) 138 XDR *xdrs; 139 caddr_t addr; 140 u_int len; 141 { 142 143 if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 144 return (FALSE); 145 return (TRUE); 146 } 147 148 static bool_t 149 xdrstdio_putbytes(xdrs, addr, len) 150 XDR *xdrs; 151 caddr_t addr; 152 u_int len; 153 { 154 155 if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 156 return (FALSE); 157 return (TRUE); 158 } 159 160 static u_int 161 xdrstdio_getpos(xdrs) 162 XDR *xdrs; 163 { 164 165 return ((u_int) ftell((FILE *)xdrs->x_private)); 166 } 167 168 static bool_t 169 xdrstdio_setpos(xdrs, pos) 170 XDR *xdrs; 171 u_int pos; 172 { 173 174 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 175 FALSE : TRUE); 176 } 177 178 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
Indexes created Sat Sep 27 14:09:57 GMT 2025