Bug Summary

File:doc/examples/tree2.c
Location:line 46, column 5
Description:Value stored to 'dtd' is never read

Annotated Source Code

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 tree2.res ; rm tree2.tmp
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((void*)0); /* document pointer */
29 xmlNodePtr root_node = NULL((void*)0), node = NULL((void*)0), node1 = NULL((void*)0);/* node pointers */
30 xmlDtdPtr dtd = NULL((void*)0); /* DTD pointer */
31 char buff[256];
32 int i, j;
33
34 LIBXML_TEST_VERSIONxmlCheckVersion(20703);;
35
36 /*
37 * Creates a new document, a node and set it as a root node
38 */
39 doc = xmlNewDoc(BAD_CAST(xmlChar *) "1.0");
40 root_node = xmlNewNode(NULL((void*)0), BAD_CAST(xmlChar *) "root");
41 xmlDocSetRootElement(doc, root_node);
42
43 /*
44 * Creates a DTD declaration. Isn't mandatory.
45 */
46 dtd = xmlCreateIntSubset(doc, BAD_CAST(xmlChar *) "root", NULL((void*)0), BAD_CAST(xmlChar *) "tree2.dtd");
Value stored to 'dtd' is never read
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((void*)0), BAD_CAST(xmlChar *) "node1",
53 BAD_CAST(xmlChar *) "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((void*)0), BAD_CAST(xmlChar *) "node2", NULL((void*)0));
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((void*)0), BAD_CAST(xmlChar *) "node3",
65 BAD_CAST(xmlChar *) "this node has attributes");
66 xmlNewProp(node, BAD_CAST(xmlChar *) "attribute", BAD_CAST(xmlChar *) "yes");
67 xmlNewProp(node, BAD_CAST(xmlChar *) "foo", BAD_CAST(xmlChar *) "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((void*)0), BAD_CAST(xmlChar *) "node4");
75 node1 = xmlNewText(BAD_CAST(xmlChar *)
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((void*)0), BAD_CAST(xmlChar *) buff, NULL((void*)0));
86 for (j = 1; j < 4; j++) {
87 sprintf(buff, "node%d%d", i, j);
88 node1 = xmlNewChild(node, NULL((void*)0), BAD_CAST(xmlChar *) buff, NULL((void*)0));
89 xmlNewProp(node1, BAD_CAST(xmlChar *) "odd", BAD_CAST(xmlChar *)((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(stderrstderr, "tree support not compiled in\n");
116 exit(1);
117}
118#endif