xdr_stdio.c revision 1.18
1 /* $NetBSD: xdr_stdio.c,v 1.18 2012/03/20 17:14:50 matt 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 1.18 2012/03/20 17:14:50 matt 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(XDR *); 64 static bool_t xdrstdio_getlong(XDR *, long *); 65 static bool_t xdrstdio_putlong(XDR *, const long *); 66 static bool_t xdrstdio_getbytes(XDR *, char *, u_int); 67 static bool_t xdrstdio_putbytes(XDR *, const char *, u_int); 68 static u_int xdrstdio_getpos(XDR *); 69 static bool_t xdrstdio_setpos(XDR *, u_int); 70 static int32_t *xdrstdio_inline(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 NULL, /* xdrstdio_control */ 85 }; 86 87 /* 88 * Initialize a stdio xdr stream. 89 * Sets the xdr stream handle xdrs for use on the stream file. 90 * Operation flag is set to op. 91 */ 92 void 93 xdrstdio_create(XDR *xdrs, FILE *file, enum xdr_op op) 94 { 95 96 xdrs->x_op = op; 97 xdrs->x_ops = &xdrstdio_ops; 98 xdrs->x_private = 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(XDR *xdrs) 109 { 110 (void)fflush((FILE *)xdrs->x_private); 111 /* XXX: should we close the file ?? */ 112 } 113 114 static bool_t 115 xdrstdio_getlong(XDR *xdrs, long *lp) 116 { 117 u_int32_t temp; 118 119 if (fread(&temp, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 120 return (FALSE); 121 *lp = (long)ntohl(temp); 122 return (TRUE); 123 } 124 125 static bool_t 126 xdrstdio_putlong(XDR *xdrs, const long *lp) 127 { 128 int32_t mycopy = htonl((u_int32_t)*lp); 129 130 if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 131 return (FALSE); 132 return (TRUE); 133 } 134 135 static bool_t 136 xdrstdio_getbytes(XDR *xdrs, char *addr, u_int len) 137 { 138 139 if ((len != 0) && (fread(addr, (size_t)len, 1, (FILE *)xdrs->x_private) != 1)) 140 return (FALSE); 141 return (TRUE); 142 } 143 144 static bool_t 145 xdrstdio_putbytes(XDR *xdrs, const char *addr, u_int len) 146 { 147 148 if ((len != 0) && (fwrite(addr, (size_t)len, 1, 149 (FILE *)xdrs->x_private) != 1)) 150 return (FALSE); 151 return (TRUE); 152 } 153 154 static u_int 155 xdrstdio_getpos(XDR *xdrs) 156 { 157 158 return ((u_int) ftell((FILE *)xdrs->x_private)); 159 } 160 161 static bool_t 162 xdrstdio_setpos(XDR *xdrs, u_int pos) 163 { 164 165 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 166 FALSE : TRUE); 167 } 168 169 /* ARGSUSED */ 170 static int32_t * 171 xdrstdio_inline(XDR *xdrs, u_int len) 172 { 173 174 /* 175 * Must do some work to implement this: must insure 176 * enough data in the underlying stdio buffer, 177 * that the buffer is aligned so that we can indirect through a 178 * long *, and stuff this pointer in xdrs->x_buf. Doing 179 * a fread or fwrite to a scratch buffer would defeat 180 * most of the gains to be had here and require storage 181 * management on this buffer, so we don't do this. 182 */ 183 return (NULL); 184 } 185
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