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[/] [or1k/] [trunk/] [rtems-20020807/] [cpukit/] [librpc/] [src/] [xdr/] [xdr_array.c] - Blame information for rev 1765

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1 1026 ivang
/*
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 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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 * unrestricted use provided that this legend is included on all tape
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 * media and as a part of the software program in whole or part.  Users
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 * may copy or modify Sun RPC without charge, but are not authorized
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 * to license or distribute it to anyone else except as part of a product or
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 * program developed by the user.
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 *
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 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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 *
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 * Sun RPC is provided with no support and without any obligation on the
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 * part of Sun Microsystems, Inc. to assist in its use, correction,
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 * modification or enhancement.
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 *
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 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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 * OR ANY PART THEREOF.
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 *
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 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
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 * or profits or other special, indirect and consequential damages, even if
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 * Sun has been advised of the possibility of such damages.
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 *
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 * Sun Microsystems, Inc.
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 * 2550 Garcia Avenue
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 * Mountain View, California  94043
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 */
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#if defined(LIBC_SCCS) && !defined(lint)
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/*static char *sccsid = "from: @(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro";*/
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/*static char *sccsid = "from: @(#)xdr_array.c  2.1 88/07/29 4.0 RPCSRC";*/
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static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr_array.c,v 1.8 1999/08/28 00:02:55 peter Exp $";
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#endif
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/*
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 * xdr_array.c, Generic XDR routines impelmentation.
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 *
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 * Copyright (C) 1984, Sun Microsystems, Inc.
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 *
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 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
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 * arrays.  See xdr.h for more info on the interface to xdr.
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#define LASTUNSIGNED ((u_int) 0-1)
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/*
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 * XDR an array of arbitrary elements
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 * *addrp is a pointer to the array, *sizep is the number of elements.
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 * If addrp is NULL (*sizep * elsize) bytes are allocated.
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 * elsize is the size (in bytes) of each element, and elproc is the
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 * xdr procedure to call to handle each element of the array.
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 */
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bool_t
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xdr_array(xdrs, addrp, sizep, maxsize, elsize, elproc)
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        register XDR *xdrs;
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        caddr_t *addrp;         /* array pointer */
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        u_int *sizep;           /* number of elements */
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        u_int maxsize;          /* max numberof elements */
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        u_int elsize;           /* size in bytes of each element */
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        xdrproc_t elproc;       /* xdr routine to handle each element */
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{
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        register u_int i;
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        register caddr_t target = *addrp;
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        register u_int c;  /* the actual element count */
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        register bool_t stat = TRUE;
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        register u_int nodesize;
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        /* like strings, arrays are really counted arrays */
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        if (! xdr_u_int(xdrs, sizep)) {
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                return (FALSE);
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        }
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        c = *sizep;
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        if ((c > maxsize) && (xdrs->x_op != XDR_FREE)) {
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                return (FALSE);
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        }
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        nodesize = c * elsize;
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        /*
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         * if we are deserializing, we may need to allocate an array.
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         * We also save time by checking for a null array if we are freeing.
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         */
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        if (target == NULL)
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                switch (xdrs->x_op) {
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                case XDR_DECODE:
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                        if (c == 0)
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                                return (TRUE);
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                        *addrp = target = mem_alloc(nodesize);
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                        if (target == NULL) {
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                                (void) fprintf(stderr,
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                                        "xdr_array: out of memory\n");
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                                return (FALSE);
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                        }
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                        memset(target, 0, nodesize);
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                        break;
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                case XDR_FREE:
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                        return (TRUE);
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                case XDR_ENCODE:  /* to avoid warning */
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                        break;
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        }
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        /*
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         * now we xdr each element of array
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         */
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        for (i = 0; (i < c) && stat; i++) {
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                stat = (*elproc)(xdrs, target, LASTUNSIGNED);
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                target += elsize;
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        }
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        /*
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         * the array may need freeing
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         */
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        if (xdrs->x_op == XDR_FREE) {
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                mem_free(*addrp, nodesize);
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                *addrp = NULL;
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        }
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        return (stat);
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}
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/*
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 * xdr_vector():
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 *
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 * XDR a fixed length array. Unlike variable-length arrays,
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 * the storage of fixed length arrays is static and unfreeable.
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 * > basep: base of the array
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 * > size: size of the array
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 * > elemsize: size of each element
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 * > xdr_elem: routine to XDR each element
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 */
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bool_t
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xdr_vector(xdrs, basep, nelem, elemsize, xdr_elem)
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        register XDR *xdrs;
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        register char *basep;
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        register u_int nelem;
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        register u_int elemsize;
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        register xdrproc_t xdr_elem;
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{
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        register u_int i;
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        register char *elptr;
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        elptr = basep;
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        for (i = 0; i < nelem; i++) {
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                if (! (*xdr_elem)(xdrs, elptr, LASTUNSIGNED)) {
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                        return(FALSE);
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                }
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                elptr += elemsize;
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        }
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        return(TRUE);
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}
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