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29 #include <afsconfig.h>
30 #include <afs/param.h>
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 #if defined(KERNEL) && !defined(UKERNEL)
46 #include <sys/param.h>
47 #ifdef AFS_LINUX20_ENV
48 #include "../h/string.h"
50 #define bzero(A,C) memset((A), 0, (C))
53 #include <sys/systm.h>
59 #if defined(KERNEL) && !defined(UKERNEL)
61 #include <afs/longc_procs.h>
65 #define LASTUNSIGNED ((u_int)0-1)
69 * XDR an array of arbitrary elements
70 * *addrp is a pointer to the array, *sizep is the number of elements.
71 * If addrp is NULL (*sizep * elsize) bytes are allocated.
72 * elsize is the size (in bytes) of each element, and elproc is the
73 * xdr procedure to call to handle each element of the array.
76 caddr_t *addrp; * array pointer *
77 u_int *sizep; * number of elements *
78 u_int maxsize; * max numberof elements *
79 u_int elsize; * size in bytes of each element *
80 xdrproc_t elproc; * xdr routine to handle each element *
83 bool_t xdr_arrayN(register XDR *xdrs, caddr_t *addrp, u_int *sizep,
84 u_int maxsize, u_int elsize, xdrproc_t elproc)
87 register caddr_t target = *addrp;
88 register u_int c; /* the actual element count */
89 register bool_t stat = TRUE;
90 register u_int nodesize;
92 i = ((~0) >> 1) / elsize;
93 if (maxsize > i) maxsize = i;
95 /* like strings, arrays are really counted arrays */
96 if (! xdr_u_int(xdrs, sizep)) {
100 if ((c > maxsize) && (xdrs->x_op != XDR_FREE)) {
103 nodesize = c * elsize;
106 * if we are deserializing, we may need to allocate an array.
107 * We also save time by checking for a null array if we are freeing.
110 switch (xdrs->x_op) {
114 *addrp = target = (caddr_t) osi_alloc(nodesize);
115 if (target == NULL) {
118 memset(target, 0, (u_int)nodesize);
126 * now we xdr each element of array
128 for (i = 0; (i < c) && stat; i++) {
129 stat = (*elproc)(xdrs, target, LASTUNSIGNED);
134 * the array may need freeing
136 if (xdrs->x_op == XDR_FREE) {
137 osi_free(*addrp, nodesize);