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239 lines
7.5 KiB
239 lines
7.5 KiB
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "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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body, 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 a:link, pre a:visited, tt a:link, tt a:visited { font-weight: bold; color: #7f0000; }
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pre { font-weight: bold; color: #7f0000; margin-left: 2em; text-align: left }
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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: v1.1, July 20, 2003<br/>
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[ <a
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href="mxml-1.1.tar.gz">Download Source (.tar.gz 64k)</a>
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| <a
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href="mxml-1.1-1.i386.rpm">Download Linux RPM (.i386.rpm 42k)</a>
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| <a href="CHANGES">Change Log</a> | <a
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href="documentation.html">Documentation</a> | <a
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href="http://freshmeat.net/projects/mxml">Rate/Make Comments</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 provides the following functionality:</p>
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<ul>
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<li>Reading and writing of UTF-8 encoded XML files.</li>
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<li>Data is stored in a linked-list tree structure,
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preserving the XML data hierarchy.</li>
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<li>Supports arbitrary element names, attributes, and
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attribute values with no preset limits, just available
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memory.</li>
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<li>Supports integer, real, opaque ("cdata"), and text
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data types in "leaf" nodes.</li>
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<li>Functions for creating and managing trees of data.</li>
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<li>"Find" and "walk" functions for easily locating and
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navigating trees of data.</li>
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</ul>
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<p>Mini-XML doesn't do validation or other types of processing
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on the data based upon schema files or other sources of
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definition information, nor does it support character entities
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other than those required by the XML specification. Also, since
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Mini-XML does not support the UTF-16 encoding, it is technically
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not a conforming XML consumer/client.</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 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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</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 a work in progress. Aside from
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the information that follows, the <a
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href="documentation.html">documentation</a> page provides a
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handy reference and is automatically generated using Mini-XML.
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You can also look at the <tt><a
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href="testmxml.c">testmxml.c</a></tt> and <tt><a
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href="mxmldoc.c">mxmldoc.c</a></tt> source files for examples of
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using Mini-XML.</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 <a
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href="documentation.html#mxml_node_t"><tt>mxml_node_t</tt></a>
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structure; the <a
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href="documentation.html#mxml_type_t"><tt>type</tt></a> member
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defines the node type (element, integer, opaque, real, or text)
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which determines which value you want to look at in the <a
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href="documentation.html#mxml_value_t"><tt>value</tt></a>
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union. New nodes can be created using the <a
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href="documentation.html#mxmlNewElement"><tt>mxmlNewElement()</tt></a>,
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<a
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href="documentation.html#mxmlNewInteger"><tt>mxmlNewInteger()</tt></a>,
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<a
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href="documentation.html#mxmlNewOpaque"><tt>mxmlNewOpaque()</tt></a>,
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<a
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href="documentation.html#mxmlNewReal"><tt>mxmlNewReal()</tt></a>,
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and <a
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href="documentation.html#mxmlNewText"><tt>mxmlNewText()</tt></a>
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functions. Only elements can have child nodes, and the top node
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must be an element, usually "?xml".</p>
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<p>You load an XML file using the <a
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href="documentation.html#mxmlLoadFile"><tt>mxmlLoadFile()</tt></a>
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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", "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 <a
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href="documentation.html#mxmlSaveFile"><tt>mxmlSaveFile()</tt></a>
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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, MXML_NO_CALLBACK);
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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 <a
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href="documentation.html#mxmlFindElement"><tt>mxmlFindElement()</tt></a>
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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 <a
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href="documentation.html#mxmlDelete"><tt>mxmlDelete()</tt></a>
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function to recursively free the memory that is used for a
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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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