| 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 | #include <afsconfig.h> |
| 30 | #include <afs/param.h> |
| 31 | |
| 32 | #ifndef NeXT |
| 33 | |
| 34 | #ifndef KERNEL |
| 35 | # include <roken.h> |
| 36 | #endif |
| 37 | |
| 38 | #include "rx.h" |
| 39 | |
| 40 | /* |
| 41 | * xdr_array.c, Generic XDR routines impelmentation. |
| 42 | * |
| 43 | * Copyright (C) 1984, Sun Microsystems, Inc. |
| 44 | * |
| 45 | * These are the "non-trivial" xdr primitives used to serialize and de-serialize |
| 46 | * arrays. See xdr.h for more info on the interface to xdr. |
| 47 | */ |
| 48 | |
| 49 | #if defined(KERNEL) && !defined(UKERNEL) |
| 50 | #if !defined(AFS_LINUX26_ENV) |
| 51 | #include <sys/param.h> |
| 52 | #endif |
| 53 | #ifdef AFS_LINUX20_ENV |
| 54 | #include "h/string.h" |
| 55 | #else |
| 56 | #ifndef AFS_DARWIN90_ENV |
| 57 | #include <sys/systm.h> |
| 58 | #endif |
| 59 | #endif /* AFS_LINUX20_ENV */ |
| 60 | #endif |
| 61 | #include "xdr.h" |
| 62 | |
| 63 | #define LASTUNSIGNED ((u_int)0-1) |
| 64 | |
| 65 | |
| 66 | /* |
| 67 | * XDR an array of arbitrary elements |
| 68 | * *addrp is a pointer to the array, *sizep is the number of elements. |
| 69 | * If addrp is NULL (*sizep * elsize) bytes are allocated. |
| 70 | * elsize is the size (in bytes) of each element, and elproc is the |
| 71 | * xdr procedure to call to handle each element of the array. |
| 72 | */ |
| 73 | /* |
| 74 | caddr_t *addrp; * array pointer * |
| 75 | u_int *sizep; * number of elements * |
| 76 | u_int maxsize; * max numberof elements * |
| 77 | u_int elsize; * size in bytes of each element * |
| 78 | xdrproc_t elproc; * xdr routine to handle each element * |
| 79 | */ |
| 80 | |
| 81 | bool_t |
| 82 | xdr_array(XDR * xdrs, caddr_t * addrp, u_int * sizep, u_int maxsize, |
| 83 | u_int elsize, xdrproc_t elproc) |
| 84 | { |
| 85 | u_int i; |
| 86 | caddr_t target = *addrp; |
| 87 | u_int c; /* the actual element count */ |
| 88 | bool_t stat = TRUE; |
| 89 | u_int nodesize; |
| 90 | |
| 91 | i = ((~0u) >> 1) / elsize; |
| 92 | if (maxsize > i) |
| 93 | maxsize = i; |
| 94 | |
| 95 | /* like strings, arrays are really counted arrays */ |
| 96 | if (!xdr_u_int(xdrs, sizep)) { |
| 97 | return (FALSE); |
| 98 | } |
| 99 | c = *sizep; |
| 100 | if ((c > maxsize) && (xdrs->x_op != XDR_FREE)) { |
| 101 | return (FALSE); |
| 102 | } |
| 103 | nodesize = c * elsize; |
| 104 | |
| 105 | /* |
| 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. |
| 108 | */ |
| 109 | if (target == NULL) |
| 110 | switch (xdrs->x_op) { |
| 111 | case XDR_DECODE: |
| 112 | if (c == 0) |
| 113 | return (TRUE); |
| 114 | *addrp = target = (caddr_t)osi_alloc(nodesize); |
| 115 | if (target == NULL) { |
| 116 | return (FALSE); |
| 117 | } |
| 118 | memset(target, 0, (u_int) nodesize); |
| 119 | break; |
| 120 | |
| 121 | case XDR_FREE: |
| 122 | return (TRUE); |
| 123 | |
| 124 | case XDR_ENCODE: |
| 125 | break; |
| 126 | } |
| 127 | |
| 128 | /* |
| 129 | * now we xdr each element of array |
| 130 | */ |
| 131 | for (i = 0; (i < c) && stat; i++) { |
| 132 | stat = (*elproc) (xdrs, target, LASTUNSIGNED); |
| 133 | target += elsize; |
| 134 | } |
| 135 | |
| 136 | /* |
| 137 | * the array may need freeing |
| 138 | */ |
| 139 | if (xdrs->x_op == XDR_FREE) { |
| 140 | osi_free(*addrp, nodesize); |
| 141 | *addrp = NULL; |
| 142 | } |
| 143 | return (stat); |
| 144 | } |
| 145 | #endif /* NeXT */ |