release/src/router/libxml2/doc/examples/tree2.c

   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