/**

 * section: Tree

 * synopsis: Navigates a tree to print element names

 * purpose: Parse a file to a tree, use xmlDocGetRootElement() to

 *          get the root element, then walk the document and print

 *          all the element name in document order.

 * usage: tree1 filename_or_URL

 * test: tree1 test2.xml > tree1.tmp && diff tree1.tmp $(srcdir)/tree1.res

 * author: Dodji Seketeli

 * copy: see Copyright for the status of this software.

 */

#include <stdio.h>

#include <libxml/parser.h>

#include <libxml/tree.h>

#ifdef LIBXML_TREE_ENABLED

/*

 *To compile this file using gcc you can type

 *gcc `xml2-config --cflags --libs` -o xmlexample libxml2-example.c

 */

/**

 * print_element_names:

 * @a_node: the initial xml node to consider.

 *

 * Prints the names of the all the xml elements

 * that are siblings or children of a given xml node.

 */

static void

print_element_names(xmlNode * a_node)

{

    xmlNode *cur_node = NULL;

    for (cur_node = a_node; cur_node; cur_node = cur_node->next) {

        if (cur_node->type == XML_ELEMENT_NODE) {

            printf("node type: Element, name: %s\n", cur_node->name);

        }

        print_element_names(cur_node->children);

    }

}

/**

 * Simple example to parse a file called "file.xml", 

 * walk down the DOM, and print the name of the 

 * xml elements nodes.

 */

int

main(int argc, char **argv)

{

    xmlDoc *doc = NULL;

    xmlNode *root_element = NULL;

    if (argc != 2)

        return(1);

    /*

     * this initialize the library and check potential ABI mismatches

     * between the version it was compiled for and the actual shared

     * library used.

     */

    LIBXML_TEST_VERSION

    /*parse the file and get the DOM */

    doc = xmlReadFile(argv[1], NULL, 0);

    if (doc == NULL) {

        printf("error: could not parse file %s\n", argv[1]);

    }

    /*Get the root element node */

    root_element = xmlDocGetRootElement(doc);

    print_element_names(root_element);

    /*free the document */

    xmlFreeDoc(doc);

    /*

     *Free the global variables that may

     *have been allocated by the parser.

     */

    xmlCleanupParser();

    return 0;

}

#else

int main(void) {

    fprintf(stderr, "Tree support not compiled in\n");

    exit(1);

}

#endif