223 lines
4.9 KiB
HTML
223 lines
4.9 KiB
HTML
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
|
|
<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
|
||
|
|
<title>xdr_union()--Translate between Unions and Their XDR</title>
|
||
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
||
|
|
<!-- US Government Users Restricted Rights -->
|
||
|
|
<!-- Use, duplication or disclosure restricted by -->
|
||
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
||
|
|
<!-- Begin Header Records ========================================== -->
|
||
|
|
<!-- RPCMST SCRIPT A converted by B2H R4.1 (346) (CMS) by PMHALL at -->
|
||
|
|
<!-- RCHVMW2 on 7 Oct 1998 at 23:43:14 -->
|
||
|
|
<!-- Edited by Kersten Feb 02 -->
|
||
|
|
<!--End Header Records -->
|
||
|
|
<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<a name="Top_of_Page"></a>
|
||
|
|
<!-- Java sync-link -->
|
||
|
|
<script language="Javascript" src="../rzahg/synch.js" type="text/javascript">
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<h2>xdr_union()--Translate between Unions and Their XDR</h2>
|
||
|
|
|
||
|
|
<div class="box" style="width: 60%;">
|
||
|
|
<br>
|
||
|
|
Syntax<br>
|
||
|
|
|
||
|
|
<pre>
|
||
|
|
#include <rpc/xdr.h>
|
||
|
|
|
||
|
|
bool_t xdr_union(XDR *<em>xdrs</em>,
|
||
|
|
enum_t *<em>dscmp</em>,
|
||
|
|
char *<em>unp</em>,
|
||
|
|
const struct xdr_discrim *<em>choices</em>,
|
||
|
|
const xdrproc_t (*<em>defaultarm</em>));
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
Service Program Name: QZNFTRPC<br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
Default Public Authority: *USE<br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
Threadsafe: No<br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<p>The <strong>xdr_union()</strong> function is a filter primitive that
|
||
|
|
translates between discriminated C unions and their corresponding external
|
||
|
|
representations.</p>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Parameters</h3>
|
||
|
|
|
||
|
|
<dl>
|
||
|
|
<dt><strong>xdrs</strong> (Input) </dt>
|
||
|
|
|
||
|
|
<dd>A pointer to the eXternal Data Representation (XDR) stream handle.<br>
|
||
|
|
<br>
|
||
|
|
</dd>
|
||
|
|
|
||
|
|
<dt><strong>dscmp</strong> (Input) </dt>
|
||
|
|
|
||
|
|
<dd>The address of the union's discriminant. The discriminant is an enumeration
|
||
|
|
(<strong>enum_t</strong>) value.<br>
|
||
|
|
<br>
|
||
|
|
</dd>
|
||
|
|
|
||
|
|
<dt><strong>unp</strong> (I/O) </dt>
|
||
|
|
|
||
|
|
<dd>The address of the union.<br>
|
||
|
|
<br>
|
||
|
|
</dd>
|
||
|
|
|
||
|
|
<dt><strong>choices</strong> (Input) </dt>
|
||
|
|
|
||
|
|
<dd>A pointer to an array of <em>xdr_discrim</em> structures.<br>
|
||
|
|
<br>
|
||
|
|
</dd>
|
||
|
|
|
||
|
|
<dt><strong>defaultarm</strong> (Input) </dt>
|
||
|
|
|
||
|
|
<dd>A structure provided in case no discriminants are found. This parameter can
|
||
|
|
have a null value.</dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Authorities</h3>
|
||
|
|
|
||
|
|
<p>No authorization is required.</p>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Return Value</h3>
|
||
|
|
|
||
|
|
<table cellpadding="5">
|
||
|
|
<!-- cols="15 85" -->
|
||
|
|
<tr>
|
||
|
|
<td valign="top"><em>TRUE (1)</em></td>
|
||
|
|
<td valign="top">Successful</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td valign="top"><em>FALSE (0)</em></td>
|
||
|
|
<td valign="top">Unsuccessful</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<br>
|
||
|
|
<h3>Error Conditions</h3>
|
||
|
|
|
||
|
|
<p>None.</p>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Error Messages</h3>
|
||
|
|
|
||
|
|
<table width="100%" cellpadding="5">
|
||
|
|
<!-- cols="15 85" -->
|
||
|
|
<tr>
|
||
|
|
<th align="left" valign="top">Message ID</th>
|
||
|
|
<th align="left" valign="top">Error Message Text</th>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td width="15%" valign="top">CPE3418 E</td>
|
||
|
|
<td width="85%" valign="top">Possible APAR condition or hardware failure.</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td valign="top">CPF3CF2 E</td>
|
||
|
|
<td valign="top">Error(s) occurred during running of &1 API.</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td valign="top">CPF9872 E</td>
|
||
|
|
<td valign="top">Program or service program &1 in library &2 ended.
|
||
|
|
Reason code &3.</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Usage Notes</h3>
|
||
|
|
|
||
|
|
<p>The size of any enum data types passed to the <strong>xdr_union()</strong>
|
||
|
|
must be defined as 4 bytes.</p>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Example</h3>
|
||
|
|
|
||
|
|
<p>See <a href="../apiref/aboutapis.htm#codedisclaimer">Code disclaimer information</a>
|
||
|
|
for information pertaining to code examples.</p>
|
||
|
|
|
||
|
|
<p>The following example shows how <strong>xdr_union()</strong> is used:</p>
|
||
|
|
|
||
|
|
<pre>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <xdr.h>
|
||
|
|
|
||
|
|
#pragma enum size(4) /* Set enum size to 4 bytes */
|
||
|
|
|
||
|
|
typedef enum time_type {END=0,DC,CT} time_type ;
|
||
|
|
|
||
|
|
#pragma enum size() /* Reset enum size */
|
||
|
|
|
||
|
|
typedef union time_value
|
||
|
|
{
|
||
|
|
int discrete_time;
|
||
|
|
float continuous_time;
|
||
|
|
} time_value ;
|
||
|
|
|
||
|
|
typedef struct time
|
||
|
|
{
|
||
|
|
time_type type;
|
||
|
|
time_value value;
|
||
|
|
} time;
|
||
|
|
|
||
|
|
bool_t xdr_time(XDR *xdrs, time *p_time)
|
||
|
|
{
|
||
|
|
struct xdr_discrim handlers[] =
|
||
|
|
{
|
||
|
|
{DT,(xdrproc_t)xdr_int},
|
||
|
|
{CT,(xdrproc_t)xdr_float},
|
||
|
|
{END,NULL}
|
||
|
|
};
|
||
|
|
return
|
||
|
|
<strong>xdr_union</strong>(xdrs,(enum_t *)(&(p_time->type)),
|
||
|
|
(caddr_t)&(p_time->value),handlers,NULL);
|
||
|
|
}
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<hr>
|
||
|
|
API introduced: V4R2
|
||
|
|
|
||
|
|
<hr>
|
||
|
|
<table cellpadding="2" cellspacing="2" align="center">
|
||
|
|
<tr align="center">
|
||
|
|
<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
|
||
|
|
"rpc1.htm">Remote Procedure Call (RPC) APIs</a> | <a href="aplist.htm">APIs by
|
||
|
|
category</a></td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</body>
|
||
|
|
</html>
|
||
|
|
|