xdr_stdio.c revision 1.3.4.1
1 /* $NetBSD: xdr_stdio.c,v 1.3.4.1 1996/09/16 23:44:49 jtc 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 #if defined(LIBC_SCCS) && !defined(lint) 33 /*static char *sccsid = "from: @(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro";*/ 34 /*static char *sccsid = "from: @(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC";*/ 35 static char *rcsid = "$NetBSD: xdr_stdio.c,v 1.3.4.1 1996/09/16 23:44:49 jtc Exp $"; 36 #endif 37 38 /* 39 * xdr_stdio.c, XDR implementation on standard i/o file. 40 * 41 * Copyright (C) 1984, Sun Microsystems, Inc. 42 * 43 * This set of routines implements a XDR on a stdio stream. 44 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes 45 * from the stream. 46 */ 47 48 #include "namespace.h" 49 #include <rpc/types.h> 50 #include <stdio.h> 51 #include <rpc/xdr.h> 52 53 #ifdef __weak_alias 54 __weak_alias(xdrstdio_create,_xdrstdio_create); 55 #endif 56 57 static bool_t xdrstdio_getlong(); 58 static bool_t xdrstdio_putlong(); 59 static bool_t xdrstdio_getbytes(); 60 static bool_t xdrstdio_putbytes(); 61 static u_int xdrstdio_getpos(); 62 static bool_t xdrstdio_setpos(); 63 static int32_t *xdrstdio_inline(); 64 static void xdrstdio_destroy(); 65 66 /* 67 * Ops vector for stdio type XDR 68 */ 69 static struct xdr_ops xdrstdio_ops = { 70 xdrstdio_getlong, /* deseraialize a long int */ 71 xdrstdio_putlong, /* seraialize a long int */ 72 xdrstdio_getbytes, /* deserialize counted bytes */ 73 xdrstdio_putbytes, /* serialize counted bytes */ 74 xdrstdio_getpos, /* get offset in the stream */ 75 xdrstdio_setpos, /* set offset in the stream */ 76 xdrstdio_inline, /* prime stream for inline macros */ 77 xdrstdio_destroy /* destroy stream */ 78 }; 79 80 /* 81 * Initialize a stdio xdr stream. 82 * Sets the xdr stream handle xdrs for use on the stream file. 83 * Operation flag is set to op. 84 */ 85 void 86 xdrstdio_create(xdrs, file, op) 87 register XDR *xdrs; 88 FILE *file; 89 enum xdr_op op; 90 { 91 92 xdrs->x_op = op; 93 xdrs->x_ops = &xdrstdio_ops; 94 xdrs->x_private = (caddr_t)file; 95 xdrs->x_handy = 0; 96 xdrs->x_base = 0; 97 } 98 99 /* 100 * Destroy a stdio xdr stream. 101 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. 102 */ 103 static void 104 xdrstdio_destroy(xdrs) 105 register XDR *xdrs; 106 { 107 (void)fflush((FILE *)xdrs->x_private); 108 /* xx should we close the file ?? */ 109 }; 110 111 static bool_t 112 xdrstdio_getlong(xdrs, lp) 113 XDR *xdrs; 114 register long *lp; 115 { 116 117 if (fread((caddr_t)lp, sizeof(int32_t), 1, 118 (FILE *)xdrs->x_private) != 1) 119 return (FALSE); 120 *lp = (long)ntohl((int32_t)*lp); 121 return (TRUE); 122 } 123 124 static bool_t 125 xdrstdio_putlong(xdrs, lp) 126 XDR *xdrs; 127 long *lp; 128 { 129 long mycopy = (long)htonl((int32_t)*lp); 130 131 if (fwrite((caddr_t)&mycopy, sizeof(int32_t), 1, 132 (FILE *)xdrs->x_private) != 1) 133 return (FALSE); 134 return (TRUE); 135 } 136 137 static bool_t 138 xdrstdio_getbytes(xdrs, addr, len) 139 XDR *xdrs; 140 caddr_t addr; 141 u_int len; 142 { 143 144 if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 145 return (FALSE); 146 return (TRUE); 147 } 148 149 static bool_t 150 xdrstdio_putbytes(xdrs, addr, len) 151 XDR *xdrs; 152 caddr_t addr; 153 u_int len; 154 { 155 156 if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 157 return (FALSE); 158 return (TRUE); 159 } 160 161 static u_int 162 xdrstdio_getpos(xdrs) 163 XDR *xdrs; 164 { 165 166 return ((u_int) ftell((FILE *)xdrs->x_private)); 167 } 168 169 static bool_t 170 xdrstdio_setpos(xdrs, pos) 171 XDR *xdrs; 172 u_int pos; 173 { 174 175 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 176 FALSE : TRUE); 177 } 178 179 static int32_t * 180 xdrstdio_inline(xdrs, len) 181 XDR *xdrs; 182 u_int len; 183 { 184 185 /* 186 * Must do some work to implement this: must insure 187 * enough data in the underlying stdio buffer, 188 * that the buffer is aligned so that we can indirect through a 189 * long *, and stuff this pointer in xdrs->x_buf. Doing 190 * a fread or fwrite to a scratch buffer would defeat 191 * most of the gains to be had here and require storage 192 * management on this buffer, so we don't do this. 193 */ 194 return (NULL); 195 } 196
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