source: rtems/cpukit/librpc/src/xdr/xdr_sizeof.c @ f26145b

4.104.114.84.95
Last change on this file since f26145b was df49c60, checked in by Joel Sherrill <joel.sherrill@…>, on Jun 12, 2000 at 3:00:15 PM

Merged from 4.5.0-beta3a

  • Property mode set to 100644
File size: 3.6 KB
Line 
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 <rpc/types.h>
39#include <rpc/xdr.h>
40#include <sys/types.h>
41#include <stdlib.h>
42
43/* ARGSUSED */
44static bool_t
45x_putlong(xdrs, longp)
46        XDR *xdrs;
47        long *longp;
48{
49        xdrs->x_handy += BYTES_PER_XDR_UNIT;
50        return (TRUE);
51}
52
53/* ARGSUSED */
54static bool_t
55x_putbytes(xdrs, bp, len)
56        XDR *xdrs;
57        char  *bp;
58        int len;
59{
60        xdrs->x_handy += len;
61        return (TRUE);
62}
63
64static u_int
65x_getpostn(xdrs)
66        XDR *xdrs;
67{
68        return (xdrs->x_handy);
69}
70
71/* ARGSUSED */
72static bool_t
73x_setpostn(xdrs, pos)
74        XDR *xdrs;
75        u_int pos;
76{
77        /* This is not allowed */
78        return (FALSE);
79}
80
81static int32_t *
82x_inline(xdrs, len)
83        XDR *xdrs;
84        long len;
85{
86        if (len == 0) {
87                return (NULL);
88        }
89        if (xdrs->x_op != XDR_ENCODE) {
90                return (NULL);
91        }
92        if (len < (long) xdrs->x_base) {
93                /* x_private was already allocated */
94                xdrs->x_handy += len;
95                return ((int32_t *) xdrs->x_private);
96        } else {
97                /* Free the earlier space and allocate new area */
98                if (xdrs->x_private)
99                        free(xdrs->x_private);
100                if ((xdrs->x_private = (caddr_t) malloc(len)) == NULL) {
101                        xdrs->x_base = 0;
102                        return (NULL);
103                }
104                xdrs->x_base = (caddr_t) len;
105                xdrs->x_handy += len;
106                return ((int32_t *) xdrs->x_private);
107        }
108}
109
110static int
111harmless()
112{
113        /* Always return FALSE/NULL, as the case may be */
114        return (0);
115}
116
117static void
118x_destroy(xdrs)
119        XDR *xdrs;
120{
121        xdrs->x_handy = 0;
122        xdrs->x_base = 0;
123        if (xdrs->x_private) {
124                free(xdrs->x_private);
125                xdrs->x_private = NULL;
126        }
127        return;
128}
129
130unsigned long
131xdr_sizeof(func, data)
132        xdrproc_t func;
133        void *data;
134{
135        XDR x;
136        struct xdr_ops ops;
137        bool_t stat;
138        /* to stop ANSI-C compiler from complaining */
139        typedef  bool_t (* dummyfunc1)(XDR *, long *);
140        typedef  bool_t (* dummyfunc2)(XDR *, caddr_t, u_int);
141
142        ops.x_putlong = x_putlong;
143        ops.x_putbytes = x_putbytes;
144        ops.x_inline = x_inline;
145        ops.x_getpostn = x_getpostn;
146        ops.x_setpostn = x_setpostn;
147        ops.x_destroy = x_destroy;
148
149        /* the other harmless ones */
150        ops.x_getlong =  (dummyfunc1) harmless;
151        ops.x_getbytes = (dummyfunc2) harmless;
152
153        x.x_op = XDR_ENCODE;
154        x.x_ops = &ops;
155        x.x_handy = 0;
156        x.x_private = (caddr_t) NULL;
157        x.x_base = (caddr_t) 0;
158
159        stat = func(&x, data);
160        if (x.x_private)
161                free(x.x_private);
162        return (stat == TRUE ? (unsigned) x.x_handy: 0);
163}
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