<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<!-- xmlstreamlint.qdoc -->
<head>
<title>Qt 4.6: XML Stream Lint Example</title>
<link href="classic.css" rel="stylesheet" type="text/css" />
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="left" valign="top" width="32"><a href="http://qt.nokia.com/"><img src="images/qt-logo.png" align="left" border="0" /></a></td>
<td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="functions.html"><font color="#004faf">All Functions</font></a> · <a href="overviews.html"><font color="#004faf">Overviews</font></a></td></tr></table><h1 class="title">XML Stream Lint Example<br /><span class="subtitle"></span>
</h1>
<p>Files:</p>
<ul>
<li><a href="xml-xmlstreamlint-main-cpp.html">xml/xmlstreamlint/main.cpp</a></li>
<li><a href="xml-xmlstreamlint-xmlstreamlint-pro.html">xml/xmlstreamlint/xmlstreamlint.pro</a></li>
</ul>
<p>The XML Stream Lint example provides a simple command line utility that accepts a file name as its single argument and writes it to the standard output file.</p>
<p>The specified file is parsed using an <a href="qxmlstreamreader.html">QXmlStreamReader</a> object and written to the standard output file using an <a href="qxmlstreamwriter.html">QXmlStreamWriter</a> object. If the file does not contain a well-formed XML document or the use of namespaces in the document is incorrect, a description of the error is printed to the standard error file and will appear in the console.</p>
<a name="basic-operation"></a>
<h2>Basic Operation</h2>
<p>The main function of the example opens the file specified by the user for input (<tt>inputFile</tt>), and it uses <a href="qfile.html">QFile</a> to access the standard output file.</p>
<p>Reading XML is handled by an instance of the <a href="qxmlstreamreader.html">QXmlStreamReader</a> class, which operates on the input file object; writing is handled by an instance of <a href="qxmlstreamwriter.html">QXmlStreamWriter</a> operating on the output file object:</p>
<pre> QXmlStreamReader reader(&inputFile);
QXmlStreamWriter writer(&outputFile);</pre>
<p>The work of parsing and rewriting the XML is done in a while loop, and is driven by input from the reader:</p>
<pre> while (!reader.atEnd())
{
reader.readNext();
if (reader.error())
{
errorStream << XmlStreamLint::tr(
"Error: %1 in file %2 at line %3, column %4.\n").arg(
reader.errorString(), inputFilePath,
QString::number(reader.lineNumber()),
QString::number(reader.columnNumber()));
return ParseFailure;</pre>
<p>If more input is available, the next token from the input file is read and parsed. If an error occurred, information is written to the standard error file via a stream, and the example exits by returning a non-zero value from the main function.</p>
<pre> } else
writer.writeCurrentToken(reader);
}</pre>
<p>For valid input, the writer is fed the current token from the reader, and this is written to the output file that was specified when it was constructed.</p>
<p>When there is no more input, the loop terminates, and the example can exit successfully.</p>
<p /><address><hr /><div align="center">
<table width="100%" cellspacing="0" border="0"><tr class="address">
<td width="40%" align="left">Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)</td>
<td width="20%" align="center"><a href="trademarks.html">Trademarks</a></td>
<td width="40%" align="right"><div align="right">Qt 4.6.3</div></td>
</tr></table></div></address></body>
</html>
distrib
>
Mandriva
>
current
>
i586
>
media
>
main-updates
>
by-pkgid
>
8e6051afcdb111a0317a58fb64c2abf5
>
files
>
6489
