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199 lines
6.0 KiB
199 lines
6.0 KiB
<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<title>Mini-XML Home Page</title>
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<style><!--
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h1, h2, h3, p { font-family: sans-serif; text-align: justify; }
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h1.title, p.title { font-family: sans-serif; text-align: center; }
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tt, pre, pre a:link, pre a:visited, tt a:link, tt a:visited { font-weight: bold; color: #7f0000; }
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--></style>
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</head>
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<body>
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<p class="title" align="center">[ <a
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href="../index.html">Back to Home Page</a> ]</p>
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<h1 class="title" align="center">Mini-XML Home Page</h1>
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<p class="title" align="center">Current Release: v0.93 [ <a
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href="mxml-0.93.tar.gz">Download Source (.tar.gz 40k)</a> |
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<a href="CHANGES">View Change Log</a> ]</p>
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<h2>Introduction</h2>
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<p>Mini-XML is a small XML parsing library that you can use to
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read XML and XML-like data files in your application without
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requiring large non-standard libraries. Mini-XML only requires
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an ANSI C compatible compiler (GCC works, as do most vendors'
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ANSI C compilers) and a "make" program.</p>
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<p>Mini-XML was created to support the basic hierarchy provided
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by XML and some simple data types, but doesn't do validation or
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other types of processing on the data.</p>
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<h2>Building Mini-XML</h2>
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<p>Mini-XML comes with an autoconf-based configure script; just
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type the following command to get things going:</p>
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<pre>
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./configure
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</pre>
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<p>The default install prefix is /usr/local, which can be
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overridden using the --prefix option:</p>
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<pre>
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./configure --prefix=/foo
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</pre>
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<p>Once you have configured the software, type "make" to do the
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build and then run the test program to verify that things are
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working, as follows:</p>
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<pre>
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make
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./testmxml test.xml
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</pre>
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<h2>Installing Mini-XML</h2>
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<p>The "install" target will install Mini-XML in the lib and
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include directories:</p>
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<pre>
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make install
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</pre>
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<p>Once you have installed it, use the "-lmxml" option to link
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your application against it.</p>
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<h2>Documentation</h2>
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<p>The documentation is currently just in this page. At some
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point I'll probably do some proper documentation, but for now
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just read here and look at the <tt><a
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href="testmxml.c">testmxml.c</a></tt> source file for an
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example of reading and printing the contents of an XML file to
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stdout.</p>
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<p>Mini-XML provides a single header file which you include:</p>
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<pre>
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<a href="mxml.h">#include <mxml.h></a>
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</pre>
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<p>Nodes are defined by the <tt>mxml_node_t</tt> structure; the
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<tt>type</tt> member defines the node type (element, integer,
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opaque, real, or text) which determines which value you want to
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look at in the <tt>value</tt> union. New nodes can be created
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using the <tt>mxmlNewElement()</tt>, <tt>mxmlNewInteger()</tt>,
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<tt>mxmlNewOpaque()</tt>, <tt>mxmlNewReal()</tt>, and
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<tt>mxmlNewText()</tt> functions. Only elements can have child
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nodes, and the top node must be an element, usually "?xml".</p>
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<p>You load an XML file using the <tt>mxmlLoadFile()</tt> function:</p>
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<pre>
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FILE *fp;
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mxml_node_t *tree;
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fp = fopen("filename.xml", "r");
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tree = mxmlLoadFile(NULL, fp, MXML_NO_CALLBACK);
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fclose(fp);
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</pre>
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<p>Similarly, you save an XML file using the <tt>mxmlSaveFile()</tt>
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function:</p>
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<pre>
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FILE *fp;
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mxml_node_t *tree;
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fp = fopen("filename.xml", "w");
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mxmlSaveFile(tree, fp);
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fclose(fp);
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</pre>
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<p>You can find a named element/node using the
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<tt>mxmlFindElement()</tt> function:</p>
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<pre>
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mxml_node_t *node = mxmlFindElement(tree, tree, "name", "attr",
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"value", MXML_DESCEND);
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</pre>
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<p>The <tt>name</tt>, <tt>attr</tt>, and <tt>value</tt>
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arguments can be passed as <tt>NULL</tt> to act as wildcards,
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e.g.:</p>
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<pre>
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/* Find the first "a" element */
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node = mxmlFindElement(tree, tree, "a", NULL, NULL, MXML_DESCEND);
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/* Find the first "a" element with "href" attribute */
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node = mxmlFindElement(tree, tree, "a", "href", NULL, MXML_DESCEND);
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/* Find the first "a" element with "href" to a URL */
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node = mxmlFindElement(tree, tree, "a", "href",
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"http://www.easysw.com/~mike/mxml/", MXML_DESCEND);
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/* Find the first element with a "src" attribute*/
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node = mxmlFindElement(tree, tree, NULL, "src", NULL, MXML_DESCEND);
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/* Find the first element with a "src" = "foo.jpg" */
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node = mxmlFindElement(tree, tree, NULL, "src", "foo.jpg", MXML_DESCEND);
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</pre>
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<p>You can also iterate with the same function:</p>
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<pre>
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mxml_node_t *node;
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for (node = mxmlFindElement(tree, tree, "name", NULL, NULL, MXML_DESCEND);
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node != NULL;
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node = mxmlFindElement(node, tree, "name", NULL, NULL, MXML_DESCEND))
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{
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... do something ...
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}
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</pre>
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<p>Finally, once you are done with the XML data, use the
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<tt>mxmlDelete()</tt> function to recursively free the memory
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that is used for a particular node or the entire tree:</p>
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<pre>
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mxmlDelete(tree);
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</pre>
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<h2>Getting Help and Reporting Problems</h2>
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<p>You can email me at "mxml <i>at</i> easysw <i>dot</i> com" to
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report problems and/or ask for help. Just don't expect an
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instant response, as I get a <i>lot</i> of email...</p>
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<h2>Legal Stuff</h2>
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<p>The Mini-XML library is Copyright 2003 by Michael Sweet.</p>
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<p>This library is free software; you can redistribute it
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and/or modify it under the terms of the GNU Library General
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Public License as published by the Free Software Foundation;
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either version 2 of the License, or (at your option) any
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later version.</p>
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<p>This library is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied
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warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the GNU Library General Public License for
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more details.</p>
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<p>You should have received a copy of the GNU Library General
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Public License along with this library; if not, write to the
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Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA
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02139, USA.</p>
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</body>
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</html>
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