147 lines
3.7 KiB
HTML
147 lines
3.7 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>ntohl()--Convert Long Integer to Host Byte Order</title>
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<!-- Begin Header Records ========================================== -->
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- Change History: -->
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<!-- YYMMDD USERID Change description -->
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<!-- Unix8 SCRIPT J converted by B2H R4.1 (346) (CMS) by V2KEA304 -->
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<!-- at RCHVMW2 on 17 Feb 1999 at 11:05:09 -->
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<!-- Edited by Kersten Feb 02 -->
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<!-- End Header Records -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<!-- Java sync-link -->
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<script type="text/javascript" language="Javascript" src="../rzahg/synch.js">
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</script>
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<a name="Top_Of_Page"></a>
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<h2>ntohl()--Convert Long Integer to Host Byte Order</h2>
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<div class="box" style="width: 70%;">
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<br>
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BSD 4.3 Syntax<br>
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<pre>
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#include <sys/types.h>
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#include <netinet/in.h>
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unsigned long ntohl(unsigned long <em>network_long</em>)
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</pre>
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<br>
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Threadsafe: Yes<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<br>
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<div class="box" style="width: 70%;">
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<br>
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<a href="_xopen_source.htm">UNIX 98 Compatible Syntax</a><br>
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<pre>
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#define _XOPEN_SOURCE 520
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#include <netinet/in.h>
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uint32_t ntohl(uint32_t <em>network_long</em>)
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</pre>
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<br>
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Threadsafe: Yes<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<br>
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<p>The <em>ntohl()</em> function is used to convert a long (4-byte) integer
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from the standard network byte order to the local host byte order.</p>
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<p>There are two versions of the API, as shown above. The base i5/OS API uses BSD
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4.3 structures and syntax. The other uses syntax and structures compatible with the
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UNIX 98 programming interface specifications. You can select the UNIX 98 compatible
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interface with the <a href="_xopen_source.htm">_XOPEN_SOURCE</a> macro.</p>
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<br>
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<h3>Parameters</h3>
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<dl>
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<dt><strong>network_long</strong></dt>
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<dd>(Input) The 4-byte integer in standard network byte order that is to be
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converted to local host byte order.</dd>
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</dl>
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<br>
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<h3>Authorities</h3>
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<p>No authorization is required.</p>
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<br>
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<h3>Return Value</h3>
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<p><em>ntohl()</em> returns an integer. Possible values are:</p>
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<ul>
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<li>n (where n is the 4-byte integer in local host byte order)</li>
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</ul>
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<br>
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<h3>Usage Notes</h3>
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<p>On the iSeries server, the value returned to the caller is the same as the
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value that was passed to <em>ntohl()</em>, since the standard network byte
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order does not differ from the local host byte order.</p>
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<br>
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<h3>Related Information</h3>
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<ul>
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<li><a href="_xopen_source.htm">_XOPEN_SOURCE</a>--Using _XOPEN_SOURCE for the
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UNIX 98 compatible interface<br>
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<br>
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</li>
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<li><a href="htonl.htm">htonl()</a>--Convert Long Integer to Network Byte Order
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<br>
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<br>
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</li>
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<li><a href="htons.htm">htons()</a>--Convert Short Integer to Network Byte
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Order <br>
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<br>
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</li>
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<li><a href="ntohs.htm">ntohs()</a>--Convert Short Integer to Host Byte
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Order</li>
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</ul>
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<br>
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<hr>
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API introduced: V3R1
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<hr>
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<center>
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<table cellpadding="2" cellspacing="2">
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<tr align="center">
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<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
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"unix.htm">UNIX-Type APIs</a> | <a href="aplist.htm">APIs by category</a> </td>
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</tr>
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</table>
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</center>
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</body>
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</html>
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