61 lines
4.2 KiB
HTML
61 lines
4.2 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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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="security" content="public" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="task" />
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<meta name="DC.Title" content="Convert dynamic strings to and from EBCDIC, Unicode, and UTF-8" />
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<meta name="abstract" content="To manipulate string variables that are computed at run time, it may be necessary to convert strings to and from extended binary-coded decimal interchange (EBCDIC), Unicode, and UTF-8." />
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<meta name="description" content="To manipulate string variables that are computed at run time, it may be necessary to convert strings to and from extended binary-coded decimal interchange (EBCDIC), Unicode, and UTF-8." />
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<meta name="DC.Relation" scheme="URI" content="strings.htm" />
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<meta name="DC.Relation" scheme="URI" content="literal.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="dynamic" />
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<meta name="DC.Language" content="en-us" />
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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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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Convert dynamic strings to and from EBCDIC, Unicode, and UTF-8</title>
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</head>
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<body id="dynamic"><a name="dynamic"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Convert dynamic strings to and from EBCDIC, Unicode, and UTF-8</h1>
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<div><p>To manipulate string variables that are computed at run time, it
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may be necessary to convert strings to and from extended binary-coded decimal
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interchange (EBCDIC), Unicode, and UTF-8.</p>
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<div class="section"><p>The system API that provides for code page conversion function
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is iconv(). To use iconv(), follow these steps:</p>
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</div>
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<ol><li><span>Create a conversion descriptor with <samp class="codeph">QtqIconvOpen()</samp>.</span></li>
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<li><span>Call <samp class="codeph">iconv()</samp> to use the descriptor to convert
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to a string.</span></li>
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<li><span>Close the descriptor by using <samp class="codeph">iconv_close</samp>.</span></li>
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</ol>
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<div class="section"><p>In <a href="jniex.htm">Example 3 of the using the Java™ Native
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Interface for native methods examples</a>, the routine creates, uses, and
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then destroys the iconv conversion descriptor within the routine. This scheme
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avoids the problems with multithreaded use of an iconv_t descriptor, but for
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performance sensitive code it is better to create a conversion descriptor
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in static storage, and moderate multiple access to it using a mutual exclusion
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(mutex) or other synchronization facility.</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="strings.htm" title="Many Java Native Interface (JNI) functions accept C language-style strings as parameters. For example, the FindClass() JNI function accepts a string parameter that specifies the fully-qualified name of a classfile. If the classfile is found, it is loaded by FindClass, and a reference to it is returned to the caller of FindClass.">Strings in native methods</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="literal.htm" title="It is easier to encode literal strings in UTF-8 if the string is composed of characters with a 7-bit American Standard Code for Information Interchange (ASCII) representation.">Literal strings in native methods</a></div>
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</div>
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</div>
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</body>
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</html>
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