reactos/dll/win32/libtirpc/src/xdr_array.c

   1
   2 /*
   3  * Copyright (c) 2009, Sun Microsystems, Inc.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  * - Redistributions of source code must retain the above copyright notice,
   9  *   this list of conditions and the following disclaimer.
  10  * - Redistributions in binary form must reproduce the above copyright notice,
  11  *   this list of conditions and the following disclaimer in the documentation
  12  *   and/or other materials provided with the distribution.
  13  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  14  *   contributors may be used to endorse or promote products derived
  15  *   from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  21  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27  * POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 //#include <sys/cdefs.h>
  31
  32 /*
  33  * xdr_array.c, Generic XDR routines impelmentation.
  34  *
  35  * Copyright (C) 1984, Sun Microsystems, Inc.
  36  *
  37  * These are the "non-trivial" xdr primitives used to serialize and de-serialize
  38  * arrays.  See xdr.h for more info on the interface to xdr.
  39  */
  40
  41 #include <wintirpc.h>
  42 #include "namespace.h"
  43 //#include <err.h>
  44 //#include <limits.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48
  49 #include <rpc/types.h>
  50 #include <rpc/xdr.h>
  51 #include "un-namespace.h"
  52
  53 /*
  54  * XDR an array of arbitrary elements
  55  * *addrp is a pointer to the array, *sizep is the number of elements.
  56  * If addrp is NULL (*sizep * elsize) bytes are allocated.
  57  * elsize is the size (in bytes) of each element, and elproc is the
  58  * xdr procedure to call to handle each element of the array.
  59  */
  60 bool_t
  61 xdr_array(xdrs, addrp, sizep, maxsize, elsize, elproc)
  62         XDR *xdrs;
  63         caddr_t *addrp;         /* array pointer */
  64         u_int *sizep;           /* number of elements */
  65         u_int maxsize;          /* max numberof elements */
  66         u_int elsize;           /* size in bytes of each element */
  67         xdrproc_t elproc;       /* xdr routine to handle each element */
  68 {
  69         u_int i;
  70         caddr_t target = *addrp;
  71         u_int c;  /* the actual element count */
  72         bool_t stat = TRUE;
  73         u_int nodesize;
  74
  75         /* like strings, arrays are really counted arrays */
  76         if (!xdr_u_int(xdrs, sizep)) {
  77                 return (FALSE);
  78         }
  79         c = *sizep;
  80         if ((c > maxsize || UINT_MAX/elsize < c) &&
  81             (xdrs->x_op != XDR_FREE)) {
  82                 return (FALSE);
  83         }
  84         nodesize = c * elsize;
  85
  86         /*
  87          * if we are deserializing, we may need to allocate an array.
  88          * We also save time by checking for a null array if we are freeing.
  89          */
  90         if (target == NULL)
  91                 switch (xdrs->x_op) {
  92                 case XDR_DECODE:
  93                         if (c == 0)
  94                                 return (TRUE);
  95                         *addrp = target = mem_alloc(nodesize);
  96                         if (target == NULL) {
  97                                 //warnx("xdr_array: out of memory");
  98                                 return (FALSE);
  99                         }
 100                         memset(target, 0, nodesize);
 101                         break;
 102
 103                 case XDR_FREE:
 104                         return (TRUE);
 105
 106                 case XDR_ENCODE:
 107                         break;
 108         }
 109
 110         /*
 111          * now we xdr each element of array
 112          */
 113         for (i = 0; (i < c) && stat; i++) {
 114                 stat = (*elproc)(xdrs, target);
 115                 target += elsize;
 116         }
 117
 118         /*
 119          * the array may need freeing
 120          */
 121         if (xdrs->x_op == XDR_FREE) {
 122                 mem_free(*addrp, nodesize);
 123                 *addrp = NULL;
 124         }
 125         return (stat);
 126 }
 127
 128 /*
 129  * xdr_vector():
 130  *
 131  * XDR a fixed length array. Unlike variable-length arrays,
 132  * the storage of fixed length arrays is static and unfreeable.
 133  * > basep: base of the array
 134  * > size: size of the array
 135  * > elemsize: size of each element
 136  * > xdr_elem: routine to XDR each element
 137  */
 138 bool_t
 139 xdr_vector(xdrs, basep, nelem, elemsize, xdr_elem)
 140         XDR *xdrs;
 141         char *basep;
 142         u_int nelem;
 143         u_int elemsize;
 144         xdrproc_t xdr_elem;
 145 {
 146         u_int i;
 147         char *elptr;
 148
 149         elptr = basep;
 150         for (i = 0; i < nelem; i++) {
 151                 if (!(*xdr_elem)(xdrs, elptr)) {
 152                         return(FALSE);
 153                 }
 154                 elptr += elemsize;
 155         }
 156         return(TRUE);
 157 }