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 * xdr_sizeof.c 31 * 32 * Copyright 1990 Sun Microsystems, Inc. 33 * 34 * General purpose routine to see how much space something will use 35 * when serialized using XDR. 36 */ 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include "namespace.h" 42 #include <rpc/types.h> 43 #include <rpc/xdr.h> 44 #include <sys/types.h> 45 #include <stdlib.h> 46 #include "un-namespace.h" 47 48 /* ARGSUSED */ 49 static bool_t 50 x_putlong(xdrs, longp) 51 XDR *xdrs; 52 long *longp; 53 { 54 xdrs->x_handy += BYTES_PER_XDR_UNIT; 55 return (TRUE); 56 } 57 58 /* ARGSUSED */ 59 static bool_t 60 x_putbytes(xdrs, bp, len) 61 XDR *xdrs; 62 char *bp; 63 u_int len; 64 { 65 xdrs->x_handy += len; 66 return (TRUE); 67 } 68 69 static u_int 70 x_getpostn(xdrs) 71 XDR *xdrs; 72 { 73 return (xdrs->x_handy); 74 } 75 76 /* ARGSUSED */ 77 static bool_t 78 x_setpostn(xdrs, pos) 79 XDR *xdrs; 80 u_int pos; 81 { 82 /* This is not allowed */ 83 return (FALSE); 84 } 85 86 static int32_t * 87 x_inline(xdrs, len) 88 XDR *xdrs; 89 u_int len; 90 { 91 if (len == 0) { 92 return (NULL); 93 } 94 if (xdrs->x_op != XDR_ENCODE) { 95 return (NULL); 96 } 97 if (len < (u_int)xdrs->x_base) { 98 /* x_private was already allocated */ 99 xdrs->x_handy += len; 100 return ((int32_t *) xdrs->x_private); 101 } else { 102 /* Free the earlier space and allocate new area */ 103 if (xdrs->x_private) 104 free(xdrs->x_private); 105 if ((xdrs->x_private = (caddr_t) malloc(len)) == NULL) { 106 xdrs->x_base = 0; 107 return (NULL); 108 } 109 xdrs->x_base = (caddr_t) len; 110 xdrs->x_handy += len; 111 return ((int32_t *) xdrs->x_private); 112 } 113 } 114 115 static int 116 harmless() 117 { 118 /* Always return FALSE/NULL, as the case may be */ 119 return (0); 120 } 121 122 static void 123 x_destroy(xdrs) 124 XDR *xdrs; 125 { 126 xdrs->x_handy = 0; 127 xdrs->x_base = 0; 128 if (xdrs->x_private) { 129 free(xdrs->x_private); 130 xdrs->x_private = NULL; 131 } 132 return; 133 } 134 135 unsigned long 136 xdr_sizeof(func, data) 137 xdrproc_t func; 138 void *data; 139 { 140 XDR x; 141 struct xdr_ops ops; 142 bool_t stat; 143 /* to stop ANSI-C compiler from complaining */ 144 typedef bool_t (* dummyfunc1)(XDR *, long *); 145 typedef bool_t (* dummyfunc2)(XDR *, caddr_t, u_int); 146 147 ops.x_putlong = x_putlong; 148 ops.x_putbytes = x_putbytes; 149 ops.x_inline = x_inline; 150 ops.x_getpostn = x_getpostn; 151 ops.x_setpostn = x_setpostn; 152 ops.x_destroy = x_destroy; 153 154 /* the other harmless ones */ 155 ops.x_getlong = (dummyfunc1) harmless; 156 ops.x_getbytes = (dummyfunc2) harmless; 157 158 x.x_op = XDR_ENCODE; 159 x.x_ops = &ops; 160 x.x_handy = 0; 161 x.x_private = (caddr_t) NULL; 162 x.x_base = (caddr_t) 0; 163 164 stat = func(&x, data); 165 if (x.x_private) 166 free(x.x_private); 167 return (stat == TRUE ? (unsigned) x.x_handy: 0); 168 } 169