<?xml version='1.0' encoding='utf-8'?>
<UnlimitRectCubes>
<RectCubes>
<depth>0</depth>
<rectangle>
<height>0</height>
<width>0</width>
</rectangle>
</RectCubes>
<RectCubes>
<depth>1</depth>
<rectangle>
<height>11</height>
<width>101</width>
</rectangle>
</RectCubes>
<RectCubes>
<depth>2</depth>
<rectangle>
<height>22</height>
<width>202</width>
</rectangle>
</RectCubes>
</UnlimitRectCubes>Note: I've also included, .xml file
void print_element_names(xmlNode *a_node, char **findStr)
{
xmlNode *cur_node = NULL;
char *key = *findStr;
cur_node = a_node;
int len = 0;
while (cur_node)
{
if ((!xmlStrcmp(cur_node->name, (const xmlChar *)key)))
{
len++; //len is int type
}
cur_node = cur_node->next;
}
printf("%d", len);
//int i = 0;
//xmlChar *array = (xmlChar *)calloc(1, sizeof(xmlChar));
for (cur_node = a_node; cur_node; cur_node = cur_node->next)
{
if ((cur_node->type == XML_ELEMENT_NODE))
{
if ((!xmlStrcmp(cur_node->name, (const xmlChar *)key)))
{
//printf("%s", cur_node->children->content);
}
}
print_element_names(cur_node->children, findStr);
}
}
int main(int argc, char **argv)
{
xmlDoc *doc = NULL; /* an xml document */
xmlNode *root_element = NULL; /* a node in a xml tree */
if (argc != 2)
{
return (1);
}
LIBXML_TEST_VERSION
/* parse the file and get the DOM */
doc = xmlReadFile(argv[1], NULL, 0);
if (doc == NULL)
{
printf("error could not parse");
return;
}
/*Get the root element*/
root_element = xmlDocGetRootElement(doc);
char *myStr = "depth";
print_element_names(root_element, &myStr);
xmlFreeDoc(doc);
/*
*free the global variables that may have been allocated by the parser
*/
xmlCleanupParser();
return 0;
}
Output: 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
I need to find the frequency of occurrence of a particular tag in an .xml file, which here I have passed as a key (char*) to a function, and using xmlStrCmp() to validate the right tag.
The len is supposed to print integer value, but it seems to output this: Please refer output above. There is actually 3 occurrence of a particular tag, and output show has 3 1's. I believe, I am not traversing the XML tree properly, what is the right way to do it? or is there any XML function available to achieve this?
Input: .xml file and a tag of interest passed as key Expected Output: No. of occurence of a tag, in this case I should get 3.
for (cur_node = a_node; cur_node; cur_node = cur_node->next)
{
if ((cur_node->type == XML_ELEMENT_NODE))
{
if ((!xmlStrcmp(cur_node->children->name, (const xmlChar *)key)))
{
//printf("%s\n", cur_node->children->content);
}
printf("%s", cur_node->name);
}
len += print_element_names(cur_node->children, findStr);
}
printf("%d ", len);
Updated Output: UnlimitRectCubes0 RectCubes0 depth0 2 0 rectangle0 height0 2 0 width0 2 0 10 0 11 0 RectCubes0 depth0 2 0 rectangle0 height0 2 0 width0 2 0 10 0 11 0 RectCubes0 depth0 2 0 rectangle0 height0 2 0 width0 2 0 10 0 11 0 17 3
You do not propagate the number of found tags on one level up to the calling level.
I tried this code and got correct result:
/*
* Compile with:
* > gcc `xml2-config --cflags` -std=c99 -o test test.c `xml2-config --libs`
* */
#include <stdio.h>
#include <stdlib.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
int print_element_names(xmlNode *a_node, char **findStr)
{
xmlNode *cur_node = a_node;
char *key = *findStr;
int len = 0;
if (a_node == NULL)
return 0;
printf("a_node->name=%s\n", a_node->name);
while (cur_node)
{
printf("cur_node->name=%s, type=%d\n", cur_node->name, cur_node->type);
if ((!xmlStrcmp(cur_node->name, (const xmlChar *)key)))
{
len++; //len is int type
}
cur_node = cur_node->next;
}
printf("found=%d\n", len);
for (cur_node = a_node; cur_node; cur_node = cur_node->next)
{
if ((cur_node->type == XML_ELEMENT_NODE))
{
printf("search children for cur_node->name=%s, type=%d\n", cur_node->name, cur_node->type);
len += print_element_names(cur_node->children, findStr);
}
}
printf("found total for a_node->name %s: %d\n", a_node->name, len);
return len;
}
int main(int argc, char **argv)
{
xmlDoc *doc = NULL; /* an xml document */
xmlNode *root_element = NULL; /* a node in a xml tree */
LIBXML_TEST_VERSION
/* parse the file and get the DOM */
doc = xmlReadFile("test.xml", NULL, 0);
if (doc == NULL)
{
printf("error could not parse");
return 1;
}
/*Get the root element*/
root_element = xmlDocGetRootElement(doc);
char *myStr = "depth";
print_element_names(root_element, &myStr);
xmlFreeDoc(doc);
xmlCleanupParser();
return 0;
}