XML简单解析程序__C实现

#include <libxml/xmlreader.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <stdlib.h>

#define TEST

char * get_xml_value(xmlTextReaderPtr reader);
char * get_xml_key(xmlTextReaderPtr reader);
int parse_xml(const char *xml_buf, int xml_buf_size);

#ifdef TEST
int main()
{

char *xml_buf = "<xmlTest xmlns=/"http://www.openuri.org//"><userName>1234567</userName><dstFolder>dddd</dstFolder><subject>test</subject></xmlTest>";
parse_xml(xml_buf, strlen(xml_buf)); /*这里只是测试，不对返回值做判断*/
return 0;
}
#endif

/*分解提交过来的XML串，当然也可以是一个文件，只要更改相关调用函数*/
int parse_xml(const char *xml_buf, int xml_buf_size)
{
int ret = 0;
int node_depth = 0;
int node_type = 0;
xmlTextReaderPtr xml_reader;

xml_reader = xmlReaderForMemory(xml_buf, xml_buf_size, NULL, NULL, 0);
if (NULL == xml_reader) {
return -1;
}

while (1 == (ret = xmlTextReaderRead(xml_reader))) {

/*  这块是判断节点深度的，您可以对分解深度做一个限制
node_depth = xmlTextReaderDepth(xml_reader);
if (5 < node_depth) {
ret = -2;
break;
}
*/

/*判断当前节点的类型*/
node_type = xmlTextReaderNodeType(xml_reader);
switch(node_type) {
case 1:
get_xml_key(xml_reader);
break;
case 3:
get_xml_value(xml_reader);
break;

}
}

xmlFreeTextReader(xml_reader);
return ret;
}

/*取得当前节点的KEY值*/
char * get_xml_key(xmlTextReaderPtr reader)
{
const xmlChar *key;
key = xmlTextReaderConstName(reader);
if (NULL == key) {
return NULL;
}
printf("KEY : %s/n", key);
}
/*取得当前节点的VALUE值*/
char * get_xml_value(xmlTextReaderPtr reader)
{
const xmlChar *value;

value = xmlTextReaderConstValue(reader);
if (NULL == value) {
return NULL;
}
printf("VALUE : %s/n", value);
}