1 /*
2 * section: Tree
3 * synopsis: Creates a tree
4 * purpose: Shows how to create document, nodes and dump it to stdout or file.
5 * usage: tree2 <filename> -Default output: stdout
6 * test: tree2 > tree2.tmp && diff tree2.tmp $(srcdir)/tree2.res
7 * author: Lucas Brasilino <brasilino@recife.pe.gov.br>
8 * copy: see Copyright for the status of this software
9 */
10
11 #include <stdio.h>
12 #include <libxml/parser.h>
13 #include <libxml/tree.h>
14
15 #if defined(LIBXML_TREE_ENABLED) && defined(LIBXML_OUTPUT_ENABLED)
16
17 /*
18 *To compile this file using gcc you can type
19 *gcc `xml2-config --cflags --libs` -o tree2 tree2.c
20 */
21
22 /* A simple example how to create DOM. Libxml2 automagically
23 * allocates the necessary amount of memory to it.
24 */
25 int
main(int argc,char ** argv)26 main(int argc, char **argv)
27 {
28 xmlDocPtr doc = NULL; /* document pointer */
29 xmlNodePtr root_node = NULL, node = NULL, node1 = NULL;/* node pointers */
30 char buff[256];
31 int i, j;
32
33 LIBXML_TEST_VERSION;
34
35 /*
36 * Creates a new document, a node and set it as a root node
37 */
38 doc = xmlNewDoc(BAD_CAST "1.0");
39 root_node = xmlNewNode(NULL, BAD_CAST "root");
40 xmlDocSetRootElement(doc, root_node);
41
42 /*
43 * Creates a DTD declaration. Isn't mandatory.
44 */
45 xmlCreateIntSubset(doc, BAD_CAST "root", NULL, BAD_CAST "tree2.dtd");
46
47 /*
48 * xmlNewChild() creates a new node, which is "attached" as child node
49 * of root_node node.
50 */
51 xmlNewChild(root_node, NULL, BAD_CAST "node1",
52 BAD_CAST "content of node 1");
53 /*
54 * The same as above, but the new child node doesn't have a content
55 */
56 xmlNewChild(root_node, NULL, BAD_CAST "node2", NULL);
57
58 /*
59 * xmlNewProp() creates attributes, which is "attached" to an node.
60 * It returns xmlAttrPtr, which isn't used here.
61 */
62 node =
63 xmlNewChild(root_node, NULL, BAD_CAST "node3",
64 BAD_CAST "this node has attributes");
65 xmlNewProp(node, BAD_CAST "attribute", BAD_CAST "yes");
66 xmlNewProp(node, BAD_CAST "foo", BAD_CAST "bar");
67
68 /*
69 * Here goes another way to create nodes. xmlNewNode() and xmlNewText
70 * creates a node and a text node separately. They are "attached"
71 * by xmlAddChild()
72 */
73 node = xmlNewNode(NULL, BAD_CAST "node4");
74 node1 = xmlNewText(BAD_CAST
75 "other way to create content (which is also a node)");
76 xmlAddChild(node, node1);
77 xmlAddChild(root_node, node);
78
79 /*
80 * A simple loop that "automates" nodes creation
81 */
82 for (i = 5; i < 7; i++) {
83 sprintf(buff, "node%d", i);
84 node = xmlNewChild(root_node, NULL, BAD_CAST buff, NULL);
85 for (j = 1; j < 4; j++) {
86 sprintf(buff, "node%d%d", i, j);
87 node1 = xmlNewChild(node, NULL, BAD_CAST buff, NULL);
88 xmlNewProp(node1, BAD_CAST "odd", BAD_CAST((j % 2) ? "no" : "yes"));
89 }
90 }
91
92 /*
93 * Dumping document to stdio or file
94 */
95 xmlSaveFormatFileEnc(argc > 1 ? argv[1] : "-", doc, "UTF-8", 1);
96
97 /*free the document */
98 xmlFreeDoc(doc);
99
100 /*
101 *Free the global variables that may
102 *have been allocated by the parser.
103 */
104 xmlCleanupParser();
105
106 /*
107 * this is to debug memory for regression tests
108 */
109 xmlMemoryDump();
110 return(0);
111 }
112 #else
main(void)113 int main(void) {
114 fprintf(stderr, "tree support not compiled in\n");
115 exit(1);
116 }
117 #endif
118