1 /**
2 * section: Tree
3 * synopsis: Navigates a tree to print element names
4 * purpose: Parse a file to a tree, use xmlDocGetRootElement() to
5 * get the root element, then walk the document and print
6 * all the element name in document order.
7 * usage: tree1 filename_or_URL
8 * test: tree1 test2.xml > tree1.tmp && diff tree1.tmp $(srcdir)/tree1.res
9 * author: Dodji Seketeli
10 * copy: see Copyright for the status of this software.
11 */
12 #include <stdio.h>
13 #include <libxml/parser.h>
14 #include <libxml/tree.h>
15
16 /*
17 *To compile this file using gcc you can type
18 *gcc `xml2-config --cflags --libs` -o xmlexample libxml2-example.c
19 */
20
21 /**
22 * print_element_names:
23 * @a_node: the initial xml node to consider.
24 *
25 * Prints the names of the all the xml elements
26 * that are siblings or children of a given xml node.
27 */
28 static void
print_element_names(xmlNode * a_node)29 print_element_names(xmlNode * a_node)
30 {
31 xmlNode *cur_node = NULL;
32
33 for (cur_node = a_node; cur_node; cur_node = cur_node->next) {
34 if (cur_node->type == XML_ELEMENT_NODE) {
35 printf("node type: Element, name: %s\n", cur_node->name);
36 }
37
38 print_element_names(cur_node->children);
39 }
40 }
41
42
43 /**
44 * Simple example to parse a file called "file.xml",
45 * walk down the DOM, and print the name of the
46 * xml elements nodes.
47 */
48 int
main(int argc,char ** argv)49 main(int argc, char **argv)
50 {
51 xmlDoc *doc = NULL;
52 xmlNode *root_element = NULL;
53
54 if (argc != 2)
55 return(1);
56
57 /*
58 * this initialize the library and check potential ABI mismatches
59 * between the version it was compiled for and the actual shared
60 * library used.
61 */
62 LIBXML_TEST_VERSION
63
64 /*parse the file and get the DOM */
65 doc = xmlReadFile(argv[1], NULL, 0);
66
67 if (doc == NULL) {
68 printf("error: could not parse file %s\n", argv[1]);
69 }
70
71 /*Get the root element node */
72 root_element = xmlDocGetRootElement(doc);
73
74 print_element_names(root_element);
75
76 /*free the document */
77 xmlFreeDoc(doc);
78
79 return 0;
80 }
81