/* @(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC */ /* * Sun RPC is a product of Sun Microsystems, Inc. and is provided for * unrestricted use provided that this legend is included on all tape * media and as a part of the software program in whole or part. Users * may copy or modify Sun RPC without charge, but are not authorized * to license or distribute it to anyone else except as part of a product or * program developed by the user. * * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. * * Sun RPC is provided with no support and without any obligation on the * part of Sun Microsystems, Inc. to assist in its use, correction, * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC * OR ANY PART THEREOF. * * In no event will Sun Microsystems, Inc. be liable for any lost revenue * or profits or other special, indirect and consequential damages, even if * Sun has been advised of the possibility of such damages. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California 94043 */ #if 0 static char sccsid[] = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro"; #endif /* * xdr_array.c, Generic XDR routines implementation. * * Copyright (C) 1984, Sun Microsystems, Inc. * * These are the "non-trivial" xdr primitives used to serialize and de-serialize * arrays. See xdr.h for more info on the interface to xdr. */ #define __FORCE_GLIBC #define _GNU_SOURCE #include <features.h> #include <stdio.h> #include <string.h> #include <rpc/types.h> #include <rpc/xdr.h> #include <limits.h> #ifdef USE_IN_LIBIO # include <wchar.h> #endif #define LASTUNSIGNED ((u_int)0-1) /* * XDR an array of arbitrary elements * *addrp is a pointer to the array, *sizep is the number of elements. * If addrp is NULL (*sizep * elsize) bytes are allocated. * elsize is the size (in bytes) of each element, and elproc is the * xdr procedure to call to handle each element of the array. */ bool_t xdr_array (xdrs, addrp, sizep, maxsize, elsize, elproc) XDR *xdrs; caddr_t *addrp; /* array pointer */ u_int *sizep; /* number of elements */ u_int maxsize; /* max numberof elements */ u_int elsize; /* size in bytes of each element */ xdrproc_t elproc; /* xdr routine to handle each element */ { u_int i; caddr_t target = *addrp; u_int c; /* the actual element count */ bool_t stat = TRUE; u_int nodesize; /* like strings, arrays are really counted arrays */ if (!xdr_u_int (xdrs, sizep)) { return FALSE; } c = *sizep; /* * XXX: Let the overflow possibly happen with XDR_FREE because mem_free() * doesn't actually use its second argument anyway. */ if ((c > maxsize || c > UINT_MAX / elsize) && (xdrs->x_op != XDR_FREE)) { return FALSE; } nodesize = c * elsize; /* * if we are deserializing, we may need to allocate an array. * We also save time by checking for a null array if we are freeing. */ if (target == NULL) switch (xdrs->x_op) { case XDR_DECODE: if (c == 0) return TRUE; *addrp = target = mem_alloc (nodesize); if (target == NULL) { #ifdef USE_IN_LIBIO if (_IO_fwide (stderr, 0) > 0) (void) __fwprintf (stderr, L"%s", _("xdr_array: out of memory\n")); else #endif (void) fputs (_("xdr_array: out of memory\n"), stderr); return FALSE; } memset (target, 0, nodesize); break; case XDR_FREE: return TRUE; default: break; } /* * now we xdr each element of array */ for (i = 0; (i < c) && stat; i++) { stat = (*elproc) (xdrs, target, LASTUNSIGNED); target += elsize; } /* * the array may need freeing */ if (xdrs->x_op == XDR_FREE) { mem_free (*addrp, nodesize); *addrp = NULL; } return stat; } /* * xdr_vector(): * * XDR a fixed length array. Unlike variable-length arrays, * the storage of fixed length arrays is static and unfreeable. * > basep: base of the array * > size: size of the array * > elemsize: size of each element * > xdr_elem: routine to XDR each element */ bool_t xdr_vector (xdrs, basep, nelem, elemsize, xdr_elem) XDR *xdrs; char *basep; u_int nelem; u_int elemsize; xdrproc_t xdr_elem; { u_int i; char *elptr; elptr = basep; for (i = 0; i < nelem; i++) { if (!(*xdr_elem) (xdrs, elptr, LASTUNSIGNED)) { return FALSE; } elptr += elemsize; } return TRUE; }