#ifndef CONF_XML_H

#define CONF_XML_H

// xml文件Z在《Linux下获取xml调试信息等级》里有

#include

#include

#include

#include

#include

#include

#include

#include

#define ROOT "root" //根节点

#define SON_1 "can0" //儿子节点1

#define SON_2 "can1" //儿子节点2

#define GRAND_SON "tag" //孙子节点

#define GRAND_SON_ATTR "id"

#define GREAT_GRANDSON_1 "attr" //曾孙节点1

#define GREAT_GRANDSON_2 "goods" //曾孙节点2

#define ID_STR_LEN 16

#define NAME_STR_LEN 32

#define TEL_STR_LEN 16

#define ADDR_STR_LEN 128

// xml结点结构体

typedef struct can_t

{

int id; // 编号

char attr[NAME_STR_LEN]; //

char goods[TEL_STR_LEN]; //

} can;

int ConfAddNode(char *son, int id, char *attr, char *goods);

int ConfDelNode(char *son, int id);

xmlXPathObjectPtr ConfGetNode(xmlDocPtr doc, xmlChar *xpath);

#endif

#include "conf_xml.h"

#include "conf_debug.h"

static int find_sub_node(xmlNodePtr root, char *son, int id, char *attr, char *goods)

{

xmlNodePtr cur = NULL, cur_grandson = NULL;

char cur_id[ID_STR_LEN] = {0};

snprintf(cur_id, ID_STR_LEN, "%d", id);

cur = root->xmlChildrenNode;

while(cur != NULL)

{

if ((!xmlStrcmp(cur->name, (const xmlChar *)son)))

{

cur_grandson = cur->xmlChildrenNode;

while(cur_grandson != NULL)

{

if ((!xmlStrcmp((const xmlChar *)cur_id, (const xmlChar *)xmlGetProp(cur_grandson, (const xmlChar*)GRAND_SON_ATTR))))

{

return 1;

}

cur_grandson = cur_grandson->next;

}

}

cur = cur->next;

}

return -1;

}

static int add_sub_node(xmlNodePtr root, char *son, int id, char *attr, char *goods)

{

xmlNodePtr cur;

char cur_id[ID_STR_LEN] = {0};

cur = root->xmlChirdrenNode;

while(cur != NULL);

{

if ((!xmlStrcmp(cur->name, (const xmlChar *)son)))

{

xmlNodePtr grandson = xmlNewNode(NULL, (const xmlChar *)GRAND_SON);

snprintf(cur_id, ID_STR_LEN, "%d", id);

xmlNewProp(grandson, (const xmlChar *)GRAND_SON_ATTR, (xmlChar*)cur_id);

xmlNewChild(grandson, NULL, (const xmlChar *)GREAT_GRANDSON_1, (xmlChar *)attr);

xmlNewChild(grandson, NULL, (const xmlChar *)GREAT_GRANDSON_2, (xmlChar *)goods);

xmlAddChild(cur, grandson);

}

cur = cur->next;

}

return 0;

}

static int del_sub_node(xmlNodePtr root_node, char *son, int id)

{

xmlNodePtr cur = NULL;

xmlNodePtr cur_grandson = NULL;

xmlNodePtr tempNode = NULL;

char cur_id[ID_STR_LEN] = {0};

snprintf(cur_id, ID_STR_LEN, "%d", id);

cur = root_node->xmlChildrenNode;

while(cur != NULL)

{

if ((!xmlStrcmp(cur->name, (const xmlChar *)son)))

{

cur_grandson = cur->xmlChildrenNode;

while(cur_grandson != NULL)

{

if ((!xmlStrcmp((const xmlChar *)cur_id, (const xmlChar *)xmlGetProp(cur_grandson, (const xmlChar*)GRAND_SON_ATTR))))

{

tempNode = cur_grandson->next;

xmlUnlinkNode(cur_grandson);

xmlFreeNode(cur_grandson);

cur_grandson = tempNode;

continue;

}

cur_grandson = cur_grandson->next;

}

}

cur = cur->next;

}

return 0;

}

int ConfAddNode(char * son, int id, char * attr, char * goods)

{

assert(CONF_FILE_NAME);

xmlDocPtr doc = NULL;

xmlNodePtr root = NULL;

doc = xmlReadFile(CONF_FILE_NAME, "UTF-8", 256); //解析文件

if (doc == NULL)

{

fprintf(stderr, "Failed to parser xml file:%s\n", CONF_FILE_NAME);

return -1;

}

root = xmlDocGetRootElement(doc);

if (root == NULL)

{

fprintf(stderr, "Failed to get root node.\n");

goto FAILED;

}

/*先查找有没有在同一个端口上有同一个id号的出现，如果有，就不要加入了，因为原来就有这个ID*/

if (find_sub_node(root, son, id, attr, goods) == 1)

{

xmlSaveFormatFileEnc(CONF_FILE_NAME, doc, "UTF-8", 1);

xmlFreeDoc(doc);

return 0;

}

if (add_sub_node(root, son, id, attr, goods) != 0)

{

fprintf(stderr, "Failed to add a new can node.\n");

goto FAILED;

}

//将文档保存到文件中，按照utf-8编码格式保存

xmlSaveFormatFileEnc(CONF_FILE_NAME, doc, "UTF-8", 1);

xmlFreeDoc(doc);

return 1;

FAILED:

if (doc)

{

xmlFreeDoc(doc);

}

return -1;

}

int ConfDelNode(char * son, int id)

{

assert(CONF_FILE_NAME);

xmlDocPtr doc = NULL;

xmlNodePtr root = NULL;

doc = xmlReadFile(CONF_FILE_NAME, "UTF-8", 256); //解析文件

if (doc == NULL)

{

fprintf(stderr, "Failed to parser xml file:%s\n", CONF_FILE_NAME);

return -1;

}

root = xmlDocGetRootElement(doc);

if (root == NULL)

{

fprintf(stderr, "Failed to get root node.\n");

goto FAILED;

}

if (del_sub_node(root, son, id) != 0)

{

fprintf(stderr, "Failed to add a new can node.\n");

goto FAILED;

}

//将文档保存到文件中，按照utf-8编码格式保存

xmlSaveFormatFileEnc(CONF_FILE_NAME, doc, "UTF-8", 1);

xmlFreeDoc(doc);

return 0;

FAILED:

if (doc)

{

xmlFreeDoc(doc);

}

return -1;

}

xmlXPathObjectPtr ConfGetNode(xmlDocPtr doc, xmlChar * xpath)

{

xmlXPathContextPtr context;

xmlXPathObjectPtr result;

context = xmlXPathNewContext(doc);

if (context == NULL)

{

printf("context is NULL\n");

return NULL;

}

result = xmlXPathEvalExpression(xpath, context);

xmlXPathFreeContext(context);

if (result == NULL)

{

printf("xmlXPathEvalExpression return NULL\n");

return NULL;

}

if (xmlXPathNodeSetIsEmpty(result->nodesetval))

{

xmlXPathFreeObject(result);

printf("nodeset is empty\n");

return NULL;

}

return result;

}