xdr_stdio.c revision 1.1
1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 */ 29 30 #if defined(LIBC_SCCS) && !defined(lint) 31 /*static char *sccsid = "from: @(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro";*/ 32 /*static char *sccsid = "from: @(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC";*/ 33 static char *rcsid = "$Id: xdr_stdio.c,v 1.1 1993/10/07 07:30:30 cgd Exp $"; 34 #endif 35 36 /* 37 * xdr_stdio.c, XDR implementation on standard i/o file. 38 * 39 * Copyright (C) 1984, Sun Microsystems, Inc. 40 * 41 * This set of routines implements a XDR on a stdio stream. 42 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes 43 * from the stream. 44 */ 45 46 #include <rpc/types.h> 47 #include <stdio.h> 48 #include <rpc/xdr.h> 49 50 static bool_t xdrstdio_getlong(); 51 static bool_t xdrstdio_putlong(); 52 static bool_t xdrstdio_getbytes(); 53 static bool_t xdrstdio_putbytes(); 54 static u_int xdrstdio_getpos(); 55 static bool_t xdrstdio_setpos(); 56 static long * xdrstdio_inline(); 57 static void xdrstdio_destroy(); 58 59 /* 60 * Ops vector for stdio type XDR 61 */ 62 static struct xdr_ops xdrstdio_ops = { 63 xdrstdio_getlong, /* deseraialize a long int */ 64 xdrstdio_putlong, /* seraialize a long int */ 65 xdrstdio_getbytes, /* deserialize counted bytes */ 66 xdrstdio_putbytes, /* serialize counted bytes */ 67 xdrstdio_getpos, /* get offset in the stream */ 68 xdrstdio_setpos, /* set offset in the stream */ 69 xdrstdio_inline, /* prime stream for inline macros */ 70 xdrstdio_destroy /* destroy stream */ 71 }; 72 73 /* 74 * Initialize a stdio xdr stream. 75 * Sets the xdr stream handle xdrs for use on the stream file. 76 * Operation flag is set to op. 77 */ 78 void 79 xdrstdio_create(xdrs, file, op) 80 register XDR *xdrs; 81 FILE *file; 82 enum xdr_op op; 83 { 84 85 xdrs->x_op = op; 86 xdrs->x_ops = &xdrstdio_ops; 87 xdrs->x_private = (caddr_t)file; 88 xdrs->x_handy = 0; 89 xdrs->x_base = 0; 90 } 91 92 /* 93 * Destroy a stdio xdr stream. 94 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. 95 */ 96 static void 97 xdrstdio_destroy(xdrs) 98 register XDR *xdrs; 99 { 100 (void)fflush((FILE *)xdrs->x_private); 101 /* xx should we close the file ?? */ 102 }; 103 104 static bool_t 105 xdrstdio_getlong(xdrs, lp) 106 XDR *xdrs; 107 register long *lp; 108 { 109 110 if (fread((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1) 111 return (FALSE); 112 #ifndef mc68000 113 *lp = ntohl(*lp); 114 #endif 115 return (TRUE); 116 } 117 118 static bool_t 119 xdrstdio_putlong(xdrs, lp) 120 XDR *xdrs; 121 long *lp; 122 { 123 124 #ifndef mc68000 125 long mycopy = htonl(*lp); 126 lp = &mycopy; 127 #endif 128 if (fwrite((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1) 129 return (FALSE); 130 return (TRUE); 131 } 132 133 static bool_t 134 xdrstdio_getbytes(xdrs, addr, len) 135 XDR *xdrs; 136 caddr_t addr; 137 u_int len; 138 { 139 140 if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 141 return (FALSE); 142 return (TRUE); 143 } 144 145 static bool_t 146 xdrstdio_putbytes(xdrs, addr, len) 147 XDR *xdrs; 148 caddr_t addr; 149 u_int len; 150 { 151 152 if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 153 return (FALSE); 154 return (TRUE); 155 } 156 157 static u_int 158 xdrstdio_getpos(xdrs) 159 XDR *xdrs; 160 { 161 162 return ((u_int) ftell((FILE *)xdrs->x_private)); 163 } 164 165 static bool_t 166 xdrstdio_setpos(xdrs, pos) 167 XDR *xdrs; 168 u_int pos; 169 { 170 171 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 172 FALSE : TRUE); 173 } 174 175 static long * 176 xdrstdio_inline(xdrs, len) 177 XDR *xdrs; 178 u_int len; 179 { 180 181 /* 182 * Must do some work to implement this: must insure 183 * enough data in the underlying stdio buffer, 184 * that the buffer is aligned so that we can indirect through a 185 * long *, and stuff this pointer in xdrs->x_buf. Doing 186 * a fread or fwrite to a scratch buffer would defeat 187 * most of the gains to be had here and require storage 188 * management on this buffer, so we don't do this. 189 */ 190 return (NULL); 191 } 192
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