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Annotation of 43BSDReno/lib/librpc/xdr_reference.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_reference.c 1.2 85/02/26 Copyr 1984 Sun Micro";
                     31: #endif
                     32: 
                     33: /*
                     34:  * xdr_reference.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:  * "pointers".  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 indirect pointer
                     51:  * xdr_reference is for recursively translating a structure that is
                     52:  * referenced by a pointer inside the structure that is currently being
                     53:  * translated.  pp references a pointer to storage. If *pp is null
                     54:  * the  necessary storage is allocated.
                     55:  * size is the sizeof the referneced structure.
                     56:  * proc is the routine to handle the referenced structure.
                     57:  */
                     58: bool_t
                     59: xdr_reference(xdrs, pp, size, proc)
                     60:        register XDR *xdrs;
                     61:        caddr_t *pp;            /* the pointer to work on */
                     62:        u_int size;             /* size of the object pointed to */
                     63:        xdrproc_t proc;         /* xdr routine to handle the object */
                     64: {
                     65:        register caddr_t loc = *pp;
                     66:        register bool_t stat;
                     67: 
                     68:        if (loc == NULL)
                     69:                switch (xdrs->x_op) {
                     70:                case XDR_FREE:
                     71:                        return (TRUE);
                     72: 
                     73:                case XDR_DECODE:
                     74:                        *pp = loc = mem_alloc(size);
                     75:                        if (loc == NULL) {
                     76:                                fprintf(stderr,
                     77:                                    "xdr_reference: out of memory\n");
                     78:                                return (FALSE);
                     79:                        }
                     80:                        bzero(loc, (int)size);
                     81:                        break;
                     82:        }
                     83: 
                     84:        stat = (*proc)(xdrs, loc, LASTUNSIGNED);
                     85: 
                     86:        if (xdrs->x_op == XDR_FREE) {
                     87:                mem_free(loc, size);
                     88:                *pp = NULL;
                     89:        }
                     90:        return (stat);
                     91: }

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