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Annotation of 43BSDTahoe/new/sunrpc/xdr_array.c, revision 1.1.1.1

1.1       root        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: #ifndef lint
                     30: static char sccsid[] = "@(#)xdr_array.c 1.2 85/02/26 Copyr 1984 Sun Micro";
                     31: #endif
                     32: 
                     33: /*
                     34:  * xdr_array.c, Generic XDR routines impelmentation.
                     35:  *
                     36:  * Copyright (C) 1984, Sun Microsystems, Inc.
                     37:  *
                     38:  * These are the "non-trivial" xdr primitives used to serialize and de-serialize
                     39:  * arrays.  See xdr.h for more info on the interface to xdr.
                     40:  */
                     41: 
                     42: #include "types.h"
                     43: #include "xdr.h"
                     44: #include <stdio.h>
                     45: #define LASTUNSIGNED   ((u_int)0-1)
                     46: 
                     47: char *mem_alloc();
                     48: 
                     49: /*
                     50:  * XDR an array of arbitrary elements
                     51:  * *addrp is a pointer to the array, *sizep is the number of elements.
                     52:  * If addrp is NULL (*sizep * elsize) bytes are allocated.
                     53:  * elsize is the size (in bytes) of each element, and elproc is the
                     54:  * xdr procedure to call to handle each element of the array.
                     55:  */
                     56: bool_t
                     57: xdr_array(xdrs, addrp, sizep, maxsize, elsize, elproc)
                     58:        register XDR *xdrs;
                     59:        caddr_t *addrp;         /* array pointer */
                     60:        u_int *sizep;           /* number of elements */
                     61:        u_int maxsize;          /* max numberof elements */
                     62:        u_int elsize;           /* size in bytes of each element */
                     63:        xdrproc_t elproc;       /* xdr routine to handle each element */
                     64: {
                     65:        register u_int i;
                     66:        register caddr_t target = *addrp;
                     67:        register u_int c;  /* the actual element count */
                     68:        register bool_t stat = TRUE;
                     69:        register int nodesize;
                     70: 
                     71:        /* like strings, arrays are really counted arrays */
                     72:        if (! xdr_u_int(xdrs, sizep)) {
                     73:                return (FALSE);
                     74:        }
                     75:        c = *sizep;
                     76:        if ((c > maxsize) && (xdrs->x_op != XDR_FREE)) {
                     77:                return (FALSE);
                     78:        }
                     79:        nodesize = c * elsize;
                     80: 
                     81:        /*
                     82:         * if we are deserializing, we may need to allocate an array.
                     83:         * We also save time by checking for a null array if we are freeing.
                     84:         */
                     85:        if (target == NULL)
                     86:                switch (xdrs->x_op) {
                     87:                case XDR_DECODE:
                     88:                        if (c == 0)
                     89:                                return (TRUE);
                     90:                        *addrp = target = mem_alloc(nodesize);
                     91:                        if (target == NULL) {
                     92:                                fprintf(stderr, "xdr_array: out of memory\n");
                     93:                                return (FALSE);
                     94:                        }
                     95:                        bzero(target, nodesize);
                     96:                        break;
                     97: 
                     98:                case XDR_FREE:
                     99:                        return (TRUE);
                    100:        }
                    101:        
                    102:        /*
                    103:         * now we xdr each element of array
                    104:         */
                    105:        for (i = 0; (i < c) && stat; i++) {
                    106:                stat = (*elproc)(xdrs, target, LASTUNSIGNED);
                    107:                target += elsize;
                    108:        }
                    109: 
                    110:        /*
                    111:         * the array may need freeing
                    112:         */
                    113:        if (xdrs->x_op == XDR_FREE) {
                    114:                mem_free(*addrp, nodesize);
                    115:                *addrp = NULL;
                    116:        }
                    117:        return (stat);
                    118: }

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