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Annotation of 43BSD/contrib/sunrpc/xdr_reference.c, revision 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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