## Parsing example code

Example 2. `rdfprint.c`: Parse an RDF/XML file and print the triples

    #include <stdio.h>
    #include <raptor2.h>

    /* rdfprint.c: print triples from parsing RDF/XML */

    static void
    print_triple(void* user_data, raptor_statement* triple)
    {
      raptor_statement_print_as_ntriples(triple, stdout);
      fputc('\n', stdout);
    }

    int
    main(int argc, char *argv[])
    {
      raptor_world *world = NULL;
      raptor_parser* rdf_parser = NULL;
      unsigned char *uri_string;
      raptor_uri *uri, *base_uri;

      world = raptor_new_world();

      rdf_parser = raptor_new_parser(world, "rdfxml");

      raptor_parser_set_statement_handler(rdf_parser, NULL, print_triple);

      uri_string = raptor_uri_filename_to_uri_string(argv[1]);
      uri = raptor_new_uri(world, uri_string);
      base_uri = raptor_uri_copy(uri);

      raptor_parser_parse_file(rdf_parser, uri, base_uri);

      raptor_free_parser(rdf_parser);

      raptor_free_uri(base_uri);
      raptor_free_uri(uri);
      raptor_free_memory(uri_string);

      raptor_free_world(world);

      return 0;
    }

Compile it like this:

    $ gcc -o rdfprint rdfprint.c `pkg-config raptor2 --cflags --libs`

and run it on an RDF file as:

    $ ./rdfprint raptor.rdf
    _:genid1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://usefulinc.com/ns/doap#Project> .
    _:genid1 <http://usefulinc.com/ns/doap#name> "Raptor" .
    _:genid1 <http://usefulinc.com/ns/doap#homepage> <http://librdf.org/raptor/> .
    ...