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29 * @(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro
30 * @(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC
31 * $NetBSD: xdr_array.c,v 1.12 2000/01/22 22:19:18 mycroft Exp $
32 * $FreeBSD: src/lib/libc/xdr/xdr_array.c,v 1.15 2004/10/16 06:32:43 obrien Exp $
33 * $DragonFly: src/lib/libc/xdr/xdr_array.c,v 1.4 2005/12/05 00:47:57 swildner Exp $
37 * xdr_array.c, Generic XDR routines impelmentation.
39 * Copyright (C) 1984, Sun Microsystems, Inc.
41 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
42 * arrays. See xdr.h for more info on the interface to xdr.
45 #include "namespace.h"
52 #include <rpc/types.h>
54 #include "un-namespace.h"
57 * XDR an array of arbitrary elements
58 * *addrp is a pointer to the array, *sizep is the number of elements.
59 * If addrp is NULL (*sizep * elsize) bytes are allocated.
60 * elsize is the size (in bytes) of each element, and elproc is the
61 * xdr procedure to call to handle each element of the array.
64 * addrp: array pointer
65 * sizep: number of elements
66 * maxsize: max number of elements
67 * elsize: size in bytes of each element
68 * elproc: xdr routine to handle each element
71 xdr_array(XDR
*xdrs
, caddr_t
*addrp
, u_int
*sizep
, u_int maxsize
, u_int elsize
,
75 caddr_t target
= *addrp
;
76 u_int c
; /* the actual element count */
80 /* like strings, arrays are really counted arrays */
81 if (!xdr_u_int(xdrs
, sizep
)) {
85 if ((c
> maxsize
|| UINT_MAX
/elsize
< c
) &&
86 (xdrs
->x_op
!= XDR_FREE
)) {
89 nodesize
= c
* elsize
;
92 * if we are deserializing, we may need to allocate an array.
93 * We also save time by checking for a null array if we are freeing.
100 *addrp
= target
= mem_alloc(nodesize
);
101 if (target
== NULL
) {
102 warnx("xdr_array: out of memory");
105 memset(target
, 0, nodesize
);
116 * now we xdr each element of array
118 for (i
= 0; (i
< c
) && stat
; i
++) {
119 stat
= (*elproc
)(xdrs
, target
);
124 * the array may need freeing
126 if (xdrs
->x_op
== XDR_FREE
) {
127 mem_free(*addrp
, nodesize
);
136 * XDR a fixed length array. Unlike variable-length arrays,
137 * the storage of fixed length arrays is static and unfreeable.
138 * > basep: base of the array
139 * > size: size of the array
140 * > elemsize: size of each element
141 * > xdr_elem: routine to XDR each element
144 xdr_vector(XDR
*xdrs
, char *basep
, u_int nelem
, u_int elemsize
,
151 for (i
= 0; i
< nelem
; i
++) {
152 if (!(*xdr_elem
)(xdrs
, elptr
)) {