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106 lines
4.2 KiB
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<title>Parsing example code</title>
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<link rel="start" href="index.html" title="Raptor RDF Syntax Parsing and Serializing Library Manual">
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<link rel="up" href="tutorial-parsing.html" title="Parsing syntaxes to RDF Triples">
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<link rel="part" href="tutorial.html" title="Part I. Raptor Tutorial">
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<link rel="chapter" href="tutorial-initialising-finishing.html" title="Initialising and Finishing using the Library">
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<link rel="chapter" href="tutorial-querying-functionality.html" title="Listing built-in functionality">
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<link rel="chapter" href="tutorial-parsing.html" title="Parsing syntaxes to RDF Triples">
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<link rel="part" href="reference-manual.html" title="Part II. Raptor Reference Manual">
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<link rel="chapter" href="raptor-parsers.html" title="Parsers in Raptor (syntax to triples)">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="tutorial-parser-example"></a>Parsing example code</h2></div></div></div>
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<div class="example">
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<a name="raptor-example-rdfprint"></a><p class="title"><b>Example 2. <code class="filename">rdfprint.c</code>: Parse an RDF/XML file and print the triples</b></p>
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<div class="example-contents">
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<pre class="programlisting">
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#include <stdio.h>
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#include <raptor.h>
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/* rdfprint.c: print triples from parsing RDF/XML */
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void
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print_triple(void* user_data, const raptor_statement* triple)
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{
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raptor_print_statement_as_ntriples(triple, stdout);
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fputc('\n', stdout);
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}
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int
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main(int argc, char *argv[])
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{
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raptor_parser* rdf_parser=NULL;
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unsigned char *uri_string;
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raptor_uri *uri, *base_uri;
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raptor_init();
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rdf_parser=raptor_new_parser("rdfxml");
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raptor_set_statement_handler(rdf_parser, NULL, print_triple);
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uri_string=raptor_uri_filename_to_uri_string(argv[1]);
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uri=raptor_new_uri(uri_string);
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base_uri=raptor_uri_copy(uri);
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raptor_parse_file(rdf_parser, uri, base_uri);
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raptor_free_parser(rdf_parser);
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raptor_free_uri(base_uri);
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raptor_free_uri(uri);
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raptor_free_memory(uri_string);
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raptor_finish();
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}
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</pre>
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<p>Compile it like this:
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</p>
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<pre class="screen">
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$ gcc -o rdfprint rdfprint.c `raptor-config --cflags` `raptor-config --libs`
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</pre>
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<p>
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and run it on an RDF file as:
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</p>
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<pre class="screen">
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$ ./rdfprint raptor.rdf
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_:genid1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://usefulinc.com/ns/doap#Project> .
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_:genid1 <http://usefulinc.com/ns/doap#name> "Raptor" .
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_:genid1 <http://usefulinc.com/ns/doap#homepage> <http://librdf.org/raptor/> .
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...
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</pre>
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<p>
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</p>
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</div>
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</div>
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<br class="example-break">
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