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*/
25int
26main(int argc, char **argv)
27{
28    xmlDocPtr doc = NULL;       /* document pointer */
29    xmlNodePtr root_node = NULL, node = NULL, node1 = NULL;/* node pointers */
30    xmlDtdPtr dtd = NULL;       /* DTD pointer */
31    char buff[256];
32    int i, j;
33
34    LIBXML_TEST_VERSION;
35
36    /*
37     * Creates a new document, a node and set it as a root node
38     */
39    doc = xmlNewDoc(BAD_CAST "1.0");
40    root_node = xmlNewNode(NULL, BAD_CAST "root");
41    xmlDocSetRootElement(doc, root_node);
42
43    /*
44     * Creates a DTD declaration. Isn't mandatory.
45     */
46    dtd = xmlCreateIntSubset(doc, BAD_CAST "root", NULL, BAD_CAST "tree2.dtd");
47
48    /*
49     * xmlNewChild() creates a new node, which is "attached" as child node
50     * of root_node node.
51     */
52    xmlNewChild(root_node, NULL, BAD_CAST "node1",
53                BAD_CAST "content of node 1");
54    /*
55     * The same as above, but the new child node doesn't have a content
56     */
57    xmlNewChild(root_node, NULL, BAD_CAST "node2", NULL);
58
59    /*
60     * xmlNewProp() creates attributes, which is "attached" to an node.
61     * It returns xmlAttrPtr, which isn't used here.
62     */
63    node =
64        xmlNewChild(root_node, NULL, BAD_CAST "node3",
65                    BAD_CAST "this node has attributes");
66    xmlNewProp(node, BAD_CAST "attribute", BAD_CAST "yes");
67    xmlNewProp(node, BAD_CAST "foo", BAD_CAST "bar");
68
69    /*
70     * Here goes another way to create nodes. xmlNewNode() and xmlNewText
71     * creates a node and a text node separately. They are "attached"
72     * by xmlAddChild()
73     */
74    node = xmlNewNode(NULL, BAD_CAST "node4");
75    node1 = xmlNewText(BAD_CAST
76                   "other way to create content (which is also a node)");
77    xmlAddChild(node, node1);
78    xmlAddChild(root_node, node);
79
80    /*
81     * A simple loop that "automates" nodes creation
82     */
83    for (i = 5; i < 7; i++) {
84        sprintf(buff, "node%d", i);
85        node = xmlNewChild(root_node, NULL, BAD_CAST buff, NULL);
86        for (j = 1; j < 4; j++) {
87            sprintf(buff, "node%d%d", i, j);
88            node1 = xmlNewChild(node, NULL, BAD_CAST buff, NULL);
89            xmlNewProp(node1, BAD_CAST "odd", BAD_CAST((j % 2) ? "no" : "yes"));
90        }
91    }
92
93    /*
94     * Dumping document to stdio or file
95     */
96    xmlSaveFormatFileEnc(argc > 1 ? argv[1] : "-", doc, "UTF-8", 1);
97
98    /*free the document */
99    xmlFreeDoc(doc);
100
101    /*
102     *Free the global variables that may
103     *have been allocated by the parser.
104     */
105    xmlCleanupParser();
106
107    /*
108     * this is to debug memory for regression tests
109     */
110    xmlMemoryDump();
111    return(0);
112}
113#else
114int main(void) {
115    fprintf(stderr, "tree support not compiled in\n");
116    exit(1);
117}
118#endif
119