GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/rpc/xdr_reference.c Lines: 0 20 0.0 %
Date: 2017-11-13 Branches: 0 13 0.0 %

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/*	$OpenBSD: xdr_reference.c,v 1.12 2016/12/20 22:19:08 krw Exp $ */
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/*
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 * Copyright (c) 2010, Oracle America, Inc.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are
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 * met:
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 *
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 *     * Redistributions of source code must retain the above copyright
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 *       notice, this list of conditions and the following disclaimer.
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 *     * Redistributions in binary form must reproduce the above
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 *       copyright notice, this list of conditions and the following
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 *       disclaimer in the documentation and/or other materials
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 *       provided with the distribution.
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 *     * Neither the name of the "Oracle America, Inc." nor the names of its
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 *       contributors may be used to endorse or promote products derived
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 *       from this software without specific prior written permission.
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 *
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 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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 *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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 *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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 *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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 *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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 *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/*
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 * xdr_reference.c, Generic XDR routines implementation.
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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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 * "pointers".  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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/*
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 * XDR an indirect pointer
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 * xdr_reference is for recursively translating a structure that is
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 * referenced by a pointer inside the structure that is currently being
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 * translated.  pp references a pointer to storage. If *pp is null
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 * the  necessary storage is allocated.
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 * size is the sizeof the referneced structure.
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 * proc is the routine to handle the referenced structure.
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 */
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bool_t
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xdr_reference(XDR *xdrs,
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    caddr_t *pp,	/* the pointer to work on */
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    u_int size,		/* size of the object pointed to */
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    xdrproc_t proc)	/* xdr routine to handle the object */
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{
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	caddr_t loc = *pp;
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	bool_t stat;
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	if (loc == NULL)
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		switch (xdrs->x_op) {
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		case XDR_FREE:
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			return (TRUE);
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		case XDR_DECODE:
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			*pp = loc = (caddr_t) calloc(size, 1);
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			if (loc == NULL)
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				return (FALSE);
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			break;
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		default:
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			break;
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	}
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	stat = (*proc)(xdrs, loc);
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	if (xdrs->x_op == XDR_FREE) {
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		mem_free(loc, size);
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		*pp = NULL;
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	}
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	return (stat);
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}
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DEF_WEAK(xdr_reference);
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/*
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 * xdr_pointer():
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 *
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 * XDR a pointer to a possibly recursive data structure. This
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 * differs with xdr_reference in that it can serialize/deserialiaze
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 * trees correctly.
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 *
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 *  What's sent is actually a union:
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 *
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 *  union object_pointer switch (boolean b) {
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 *  case TRUE: object_data data;
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 *  case FALSE: void nothing;
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 *  }
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 *
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 * > objpp: Pointer to the pointer to the object.
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 * > obj_size: size of the object.
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 * > xdr_obj: routine to XDR an object.
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 *
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 */
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bool_t
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xdr_pointer(XDR *xdrs, char **objpp, u_int obj_size, xdrproc_t xdr_obj)
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{
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	bool_t more_data;
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	more_data = (*objpp != NULL);
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	if (! xdr_bool(xdrs,&more_data)) {
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		return (FALSE);
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	}
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	if (! more_data) {
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		*objpp = NULL;
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		return (TRUE);
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	}
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	return (xdr_reference(xdrs,objpp,obj_size,xdr_obj));
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}
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DEF_WEAK(xdr_pointer);