1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/* @(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC */
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
#if 0
static char sccsid[] = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro";
#endif
/*
* xdr_array.c, Generic XDR routines implementation.
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*
* These are the "non-trivial" xdr primitives used to serialize and de-serialize
* arrays. See xdr.h for more info on the interface to xdr.
*/
#include <stdio.h>
#include <string.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <limits.h>
#define LASTUNSIGNED ((u_int)0-1)
/*
* XDR an array of arbitrary elements
* *addrp is a pointer to the array, *sizep is the number of elements.
* If addrp is NULL (*sizep * elsize) bytes are allocated.
* elsize is the size (in bytes) of each element, and elproc is the
* xdr procedure to call to handle each element of the array.
*/
bool_t
xdr_array (XDR *xdrs, caddr_t *addrp, u_int *sizep, u_int maxsize, u_int elsize, xdrproc_t elproc)
{
u_int i;
caddr_t target = *addrp;
u_int c; /* the actual element count */
bool_t stat = TRUE;
u_int nodesize;
/* like strings, arrays are really counted arrays */
if (!xdr_u_int (xdrs, sizep))
{
return FALSE;
}
c = *sizep;
/*
* XXX: Let the overflow possibly happen with XDR_FREE because mem_free()
* doesn't actually use its second argument anyway.
*/
if ((c > maxsize || c > UINT_MAX / elsize) && (xdrs->x_op != XDR_FREE))
{
return FALSE;
}
nodesize = c * elsize;
/*
* if we are deserializing, we may need to allocate an array.
* We also save time by checking for a null array if we are freeing.
*/
if (target == NULL)
switch (xdrs->x_op)
{
case XDR_DECODE:
if (c == 0)
return TRUE;
*addrp = target = mem_alloc (nodesize);
if (target == NULL)
{
(void) fputs ("xdr_array: out of memory\n", stderr);
return FALSE;
}
memset (target, 0, nodesize);
break;
case XDR_FREE:
return TRUE;
default:
break;
}
/*
* now we xdr each element of array
*/
for (i = 0; (i < c) && stat; i++)
{
stat = (*elproc) (xdrs, target, LASTUNSIGNED);
target += elsize;
}
/*
* the array may need freeing
*/
if (xdrs->x_op == XDR_FREE)
{
mem_free (*addrp, nodesize);
*addrp = NULL;
}
return stat;
}
libc_hidden_def(xdr_array)
/*
* xdr_vector():
*
* XDR a fixed length array. Unlike variable-length arrays,
* the storage of fixed length arrays is static and unfreeable.
* > basep: base of the array
* > size: size of the array
* > elemsize: size of each element
* > xdr_elem: routine to XDR each element
*/
bool_t
xdr_vector (XDR *xdrs, char *basep, u_int nelem, u_int elemsize,
xdrproc_t xdr_elem)
{
u_int i;
char *elptr;
elptr = basep;
for (i = 0; i < nelem; i++)
{
if (!(*xdr_elem) (xdrs, elptr, LASTUNSIGNED))
{
return FALSE;
}
elptr += elemsize;
}
return TRUE;
}
|
