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 #ifdef LIBXML_TREE_ENABLED
17
18 /*
19 *To compile this file using gcc you can type
20 *gcc `xml2-config --cflags --libs` -o xmlexample libxml2-example.c
21 */
22
23 /**
24 * print_element_names:
25 * @a_node: the initial xml node to consider.
26 *
27 * Prints the names of the all the xml elements
28 * that are siblings or children of a given xml node.
29 */
30 static void
print_element_names(xmlNode * a_node)31 print_element_names(xmlNode * a_node)
32 {
33 xmlNode *cur_node = NULL;
34
35 for (cur_node = a_node; cur_node; cur_node = cur_node->next) {
36 if (cur_node->type == XML_ELEMENT_NODE) {
37 printf("node type: Element, name: %s\n", cur_node->name);
38 }
39
40 print_element_names(cur_node->children);
41 }
42 }
43
44
45 /**
46 * Simple example to parse a file called "file.xml",
47 * walk down the DOM, and print the name of the
48 * xml elements nodes.
49 */
50 int
main(int argc,char ** argv)51 main(int argc, char **argv)
52 {
53 xmlDoc *doc = NULL;
54 xmlNode *root_element = NULL;
55
56 if (argc != 2)
57 return(1);
58
59 /*
60 * this initialize the library and check potential ABI mismatches
61 * between the version it was compiled for and the actual shared
62 * library used.
63 */
64 LIBXML_TEST_VERSION
65
66 /*parse the file and get the DOM */
67 doc = xmlReadFile(argv[1], NULL, 0);
68
69 if (doc == NULL) {
70 printf("error: could not parse file %s\n", argv[1]);
71 }
72
73 /*Get the root element node */
74 root_element = xmlDocGetRootElement(doc);
75
76 print_element_names(root_element);
77
78 /*free the document */
79 xmlFreeDoc(doc);
80
81 /*
82 *Free the global variables that may
83 *have been allocated by the parser.
84 */
85 xmlCleanupParser();
86
87 return 0;
88 }
89 #else
main(void)90 int main(void) {
91 fprintf(stderr, "Tree support not compiled in\n");
92 exit(1);
93 }
94 #endif
95