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
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: 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
114: int main(void) {
115: fprintf(stderr, "tree support not compiled in\n");
116: exit(1);
117: }
118: #endif
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