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29 #include <afsconfig.h>
30 #include <afs/param.h>
38 * xdr_array.c, Generic XDR routines impelmentation.
40 * Copyright (C) 1984, Sun Microsystems, Inc.
42 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
43 * arrays. See xdr.h for more info on the interface to xdr.
46 #if defined(KERNEL) && !defined(UKERNEL)
47 #include <sys/param.h>
48 #ifdef AFS_LINUX20_ENV
51 #define bzero(A,C) memset((A), 0, (C))
54 #include <sys/systm.h>
61 #define LASTUNSIGNED ((u_int)0-1)
65 * XDR an array of arbitrary elements
66 * *addrp is a pointer to the array, *sizep is the number of elements.
67 * If addrp is NULL (*sizep * elsize) bytes are allocated.
68 * elsize is the size (in bytes) of each element, and elproc is the
69 * xdr procedure to call to handle each element of the array.
72 caddr_t *addrp; * array pointer *
73 u_int *sizep; * number of elements *
74 u_int maxsize; * max numberof elements *
75 u_int elsize; * size in bytes of each element *
76 xdrproc_t elproc; * xdr routine to handle each element *
80 xdr_arrayN(register XDR * xdrs, caddr_t * addrp, u_int * sizep, u_int maxsize,
81 u_int elsize, xdrproc_t elproc)
84 register caddr_t target = *addrp;
85 register u_int c; /* the actual element count */
86 register bool_t stat = TRUE;
87 register u_int nodesize;
89 i = ((~0) >> 1) / elsize;
93 /* like strings, arrays are really counted arrays */
94 if (!xdr_u_int(xdrs, sizep)) {
98 if ((c > maxsize) && (xdrs->x_op != XDR_FREE)) {
101 nodesize = c * elsize;
104 * if we are deserializing, we may need to allocate an array.
105 * We also save time by checking for a null array if we are freeing.
108 switch (xdrs->x_op) {
112 *addrp = target = (caddr_t) osi_alloc(nodesize);
113 if (target == NULL) {
116 memset(target, 0, (u_int) nodesize);
127 * now we xdr each element of array
129 for (i = 0; (i < c) && stat; i++) {
130 stat = (*elproc) (xdrs, target, LASTUNSIGNED);
135 * the array may need freeing
137 if (xdrs->x_op == XDR_FREE) {
138 osi_free(*addrp, nodesize);