4.3BSD - /usr/src/new/sunrpc/xdr_reference.c

   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: }

Defined functions

Defined variables

Defined macros