Need help with this xml tree example
Im gona be using xml for my game, i found this simple example which goes through the tree and prints each bit (here )
Im going to be wanting to check each name instead of printing it so i can put things into structures.
The thing im confused about is how to go about it. The function print_element_names calls itself which makes it more confusing. Im also not sure about the for loop, the bit which is usualy => 10 or whatever is just cur_node which i dont really follow.
:-| confused
Code:
/**
* section: Tree
* synopsis: Navigates a tree to print element names
* purpose: Parse a file to a tree, use xmlDocGetRootElement() to
* get the root element, then walk the document and print
* all the element name in document order.
* usage: tree1 filename_or_URL
* test: tree1 test2.xml > tree1.tmp ; diff tree1.tmp tree1.res ; rm tree1.tmp
* author: Dodji Seketeli
* copy: see Copyright for the status of this software.
*/
#include <stdio.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#ifdef LIBXML_TREE_ENABLED
/*
*To compile this file using gcc you can type
*gcc `xml2-config --cflags --libs` -o xmlexample libxml2-example.c
*/
/**
* print_element_names:
* @a_node: the initial xml node to consider.
*
* Prints the names of the all the xml elements
* that are siblings or children of a given xml node.
*/
static void
print_element_names(xmlNode * a_node)
{
xmlNode *cur_node = NULL;
for (cur_node = a_node; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
printf("node type: Element, name: %s\n", cur_node->name);
}
print_element_names(cur_node->children);
}
}
/**
* Simple example to parse a file called "file.xml",
* walk down the DOM, and print the name of the
* xml elements nodes.
*/
int
main(int argc, char **argv)
{
xmlDoc *doc = NULL;
xmlNode *root_element = NULL;
if (argc != 2)
return(1);
/*
* this initialize the library and check potential ABI mismatches
* between the version it was compiled for and the actual shared
* library used.
*/
LIBXML_TEST_VERSION
/*parse the file and get the DOM */
doc = xmlReadFile(argv[1], NULL, 0);
if (doc == NULL) {
printf("error: could not parse file %s\n", argv[1]);
}
/*Get the root element node */
root_element = xmlDocGetRootElement(doc);
print_element_names(root_element);
/*free the document */
xmlFreeDoc(doc);
/*
*Free the global variables that may
*have been allocated by the parser.
*/
xmlCleanupParser();
return 0;
}
#else
int main(void) {
fprintf(stderr, "Tree support not compiled in\n");
exit(1);
}
#endif
