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74 lines
3.1 KiB
74 lines
3.1 KiB
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
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<HTML>
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<HEAD>
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<TITLE>Mini-XML Programmers Manual, Version 2.2.1</TITLE>
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<META NAME="author" CONTENT="Michael Sweet">
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<META NAME="copyright" CONTENT="Copyright 2003-2005">
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<META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=iso-iso-8859-1">
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<LINK REL="Start" HREF="index.html">
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<LINK REL="Contents" HREF="toc.html">
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<LINK REL="Prev" HREF="Nodes.html">
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<LINK REL="Next" HREF="SavingXML.html">
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<STYLE TYPE="text/css"><!--
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BODY { font-family: serif }
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H1 { font-family: sans-serif }
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H2 { font-family: sans-serif }
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H3 { font-family: sans-serif }
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H4 { font-family: sans-serif }
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H5 { font-family: sans-serif }
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H6 { font-family: sans-serif }
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SUB { font-size: smaller }
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SUP { font-size: smaller }
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PRE { font-family: monospace }
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--></STYLE>
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</HEAD>
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<BODY>
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<A HREF="toc.html">Contents</A>
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<A HREF="Nodes.html">Previous</A>
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<A HREF="SavingXML.html">Next</A>
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<HR NOSHADE>
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<H2><A NAME="3_3">Loading XML</A></H2>
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<P>You load an XML file using the <A href="mxmlLoadFile.html#mxmlLoadFile">
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<TT>mxmlLoadFile()</TT></A> function:</P>
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<PRE>
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FILE *fp;
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<A href="mxmlnodet.html#mxml_node_t">mxml_node_t</A> *tree;
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fp = fopen("filename.xml", "r");
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tree = <A href="mxmlLoadFile.html#mxmlLoadFile">mxmlLoadFile</A>(NULL, fp, MXML_NO_CALLBACK);
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fclose(fp);
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</PRE>
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<P>The first argument specifies an existing XML parent node, if any.
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Normally you will pass <TT>NULL</TT> for this argument unless you are
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combining multiple XML sources. The XML file must contain a complete
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XML document including the <TT>?xml</TT> element if the parent node is <TT>
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NULL</TT>.</P>
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<P>The second argument specifies the stdio file to read from, as opened
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by <TT>fopen()</TT> or <TT>popen()</TT>. You can also use <TT>stdin</TT>
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if you are implementing an XML filter program.</P>
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<P>The third argument specifies a callback function which returns the
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value type of the immediate children for a new element node: <TT>
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MXML_INTEGER</TT>, <TT>MXML_OPAQUE</TT>, <TT>MXML_REAL</TT>, or <TT>
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MXML_TEXT</TT>. Load callbacks are described in detail in <A href="LoadCallbacks.html#LOAD_CALLBACKS">
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Chapter 3</A>. The example code uses the <TT>MXML_NO_CALLBACK</TT>
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constant which specifies that all data nodes in the document contain
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whitespace-separated text values.</P>
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<P>The <A href="mxmlLoadString.html#mxmlLoadString"><TT>mxmlLoadString()</TT>
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</A> function loads XML node trees from a string:</P>
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<PRE>
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char buffer[8192];
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<A href="mxmlnodet.html#mxml_node_t">mxml_node_t</A> *tree;
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...
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tree = <A href="mxmlLoadString.html#mxmlLoadString">mxmlLoadString</A>(NULL, buffer, MXML_NO_CALLBACK);
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</PRE>
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<P>The first and third arguments are the same as used for <TT>
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mxmlLoadFile()</TT>. The second argument specifies the string or
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character buffer to load and must be a complete XML document including
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the <TT>?xml</TT> element if the parent node is <TT>NULL</TT>.</P>
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<HR NOSHADE>
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<A HREF="toc.html">Contents</A>
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<A HREF="Nodes.html">Previous</A>
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<A HREF="SavingXML.html">Next</A>
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</BODY>
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</HTML>
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