xdr_stdio.c revision 1.3
1 /* $NetBSD: xdr_stdio.c,v 1.3 1995/02/25 03:02:09 cgd 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 1995/02/25 03:02:09 cgd 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 <rpc/types.h> 49 #include <stdio.h> 50 #include <rpc/xdr.h> 51 52 static bool_t xdrstdio_getlong(); 53 static bool_t xdrstdio_putlong(); 54 static bool_t xdrstdio_getbytes(); 55 static bool_t xdrstdio_putbytes(); 56 static u_int xdrstdio_getpos(); 57 static bool_t xdrstdio_setpos(); 58 static int32_t *xdrstdio_inline(); 59 static void xdrstdio_destroy(); 60 61 /* 62 * Ops vector for stdio type XDR 63 */ 64 static struct xdr_ops xdrstdio_ops = { 65 xdrstdio_getlong, /* deseraialize a long int */ 66 xdrstdio_putlong, /* seraialize a long int */ 67 xdrstdio_getbytes, /* deserialize counted bytes */ 68 xdrstdio_putbytes, /* serialize counted bytes */ 69 xdrstdio_getpos, /* get offset in the stream */ 70 xdrstdio_setpos, /* set offset in the stream */ 71 xdrstdio_inline, /* prime stream for inline macros */ 72 xdrstdio_destroy /* destroy stream */ 73 }; 74 75 /* 76 * Initialize a stdio xdr stream. 77 * Sets the xdr stream handle xdrs for use on the stream file. 78 * Operation flag is set to op. 79 */ 80 void 81 xdrstdio_create(xdrs, file, op) 82 register XDR *xdrs; 83 FILE *file; 84 enum xdr_op op; 85 { 86 87 xdrs->x_op = op; 88 xdrs->x_ops = &xdrstdio_ops; 89 xdrs->x_private = (caddr_t)file; 90 xdrs->x_handy = 0; 91 xdrs->x_base = 0; 92 } 93 94 /* 95 * Destroy a stdio xdr stream. 96 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. 97 */ 98 static void 99 xdrstdio_destroy(xdrs) 100 register XDR *xdrs; 101 { 102 (void)fflush((FILE *)xdrs->x_private); 103 /* xx should we close the file ?? */ 104 }; 105 106 static bool_t 107 xdrstdio_getlong(xdrs, lp) 108 XDR *xdrs; 109 register long *lp; 110 { 111 112 if (fread((caddr_t)lp, sizeof(int32_t), 1, 113 (FILE *)xdrs->x_private) != 1) 114 return (FALSE); 115 *lp = (long)ntohl((int32_t)*lp); 116 return (TRUE); 117 } 118 119 static bool_t 120 xdrstdio_putlong(xdrs, lp) 121 XDR *xdrs; 122 long *lp; 123 { 124 long mycopy = (long)htonl((int32_t)*lp); 125 126 if (fwrite((caddr_t)&mycopy, sizeof(int32_t), 1, 127 (FILE *)xdrs->x_private) != 1) 128 return (FALSE); 129 return (TRUE); 130 } 131 132 static bool_t 133 xdrstdio_getbytes(xdrs, addr, len) 134 XDR *xdrs; 135 caddr_t addr; 136 u_int len; 137 { 138 139 if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 140 return (FALSE); 141 return (TRUE); 142 } 143 144 static bool_t 145 xdrstdio_putbytes(xdrs, addr, len) 146 XDR *xdrs; 147 caddr_t addr; 148 u_int len; 149 { 150 151 if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 152 return (FALSE); 153 return (TRUE); 154 } 155 156 static u_int 157 xdrstdio_getpos(xdrs) 158 XDR *xdrs; 159 { 160 161 return ((u_int) ftell((FILE *)xdrs->x_private)); 162 } 163 164 static bool_t 165 xdrstdio_setpos(xdrs, pos) 166 XDR *xdrs; 167 u_int pos; 168 { 169 170 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 171 FALSE : TRUE); 172 } 173 174 static int32_t * 175 xdrstdio_inline(xdrs, len) 176 XDR *xdrs; 177 u_int len; 178 { 179 180 /* 181 * Must do some work to implement this: must insure 182 * enough data in the underlying stdio buffer, 183 * that the buffer is aligned so that we can indirect through a 184 * long *, and stuff this pointer in xdrs->x_buf. Doing 185 * a fread or fwrite to a scratch buffer would defeat 186 * most of the gains to be had here and require storage 187 * management on this buffer, so we don't do this. 188 */ 189 return (NULL); 190 } 191
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