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ezxml_wrapper.c
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ezxml_wrapper.c
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/*
* Copyright (c) 2023 roleo.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "string.h"
#include "ezxml_wrapper.h"
#include "utils.h"
#include "log.h"
ezxml_t root_xml;
/**
* Init xml parser
* @param buffer The buffer contaning the xml file
* @param buffer_size The size of the buffer
*/
void init_xml(char *buffer, int buffer_size)
{
root_xml = ezxml_parse_str(buffer, buffer_size);
}
/**
* Init xml parser
* @param buffer The name of the xml file
*/
void init_xml_from_file(char *file)
{
root_xml = ezxml_parse_file(file);
}
/**
* Close xml parser
*/
void close_xml()
{
ezxml_free(root_xml);
}
/**
* Get the method (the 1st element after <Body>)
* @param skip_prefix 1 to skip the prefix of the element (<prefix:method>)
* @return A pointer to the name of the method, NULL if not found
*/
const char *get_method(int skip_prefix)
{
ezxml_t xml;
char first_node[256];
int len;
char *c;
// Check if "Body" element exists
strcpy(first_node, "Body");
xml = root_xml->child;
while (xml && strcmp(first_node, xml->name)) xml = xml->ordered;
if ((xml) && (xml->child)) {
if (skip_prefix) {
c = strchr(xml->child->name, ':');
if (c == NULL) {
return xml->child->name;
} else {
c++;
return c;
}
}
}
// Check if "something:Body" element exists
xml = root_xml->child;
strcpy(first_node, ":Body");
while (xml) {
len = strlen(xml->name);
if (strcmp(first_node, &(xml->name)[len - 5]) == 0) break;
xml = xml->ordered;
}
if ((xml) && (xml->child)) {
if (skip_prefix) {
c = strchr(xml->child->name, ':');
if (c == NULL) {
return xml->child->name;
} else {
c++;
return c;
}
}
}
return NULL;
}
int go_to_parent;
/**
* Internal recursive function: get the 1st element with name "name" starting from "first_node"
* @param xml The xml structure
* @param name The name of the element to find
* @param first_node The node where to find the element
* @return A pointer to the value of the element, NULL if not found
*/
const char *get_element_rec(ezxml_t xml, char *name, char *first_node)
{
const char *ret;
char name_copy[256];
ezxml_t px, pk;
if (go_to_parent) return NULL;
// If it's the root of the document choose the first node ("Header" or "Body")
if (xml->parent == NULL) {
px = xml->child;
strcpy(name_copy, first_node);
while (px) {
if (strcmp(first_node, &(px->name)[strlen(px->name) - strlen(first_node)]) == 0) {
ret = get_element_rec(px, name, first_node);
return ret;
} else {
px = px->ordered;
}
}
// 1st node not found, exit
} else {
// Check if this node is "<name>"
if (strcmp(name, xml->name) == 0) {
return xml->txt;
}
// Check if this node is "<something:name>"
name_copy[0] = ':';
strcpy(&name_copy[1], name);
if (strcmp(name_copy, &(xml->name)[strlen(xml->name) - strlen(name_copy)]) == 0) {
return xml->txt;
}
// Check children
if (xml->child) {
ret = get_element_rec(xml->child, name, first_node);
go_to_parent = 0;
if (ret != NULL) return ret;
}
// Check brothers
while(pk = xml->ordered) {
ret = get_element_rec(pk, name, first_node);
if (go_to_parent) return NULL;
if (ret != NULL) return ret;
}
go_to_parent = 1;
}
return NULL;
}
/**
* Get the 1st element with name "name" starting from "first_node"
* @param name The name of the element to find
* @param first_node The node where to find the element
* @return A pointer to the value of the element, NULL if not found
*/
const char *get_element(char *name, char *first_node)
{
char *ret;
go_to_parent = 0;
ret = (char *) get_element_rec(root_xml, name, first_node);
if (ret == NULL) return NULL;
else return trim_mf(ret);
// Warning: the line above change the xml content
// ret should be a (const char *)
}
/**
* Internal recursive function: get the 1st element with name "name" starting from "first_node"
* @param xml The xml structure
* @param name The name of the element to find
* @param first_node The node where to find the element
* @return ezxml_t type pointing to the element, NULL if not found
*/
ezxml_t get_element_rec_ptr(ezxml_t xml, char *name, char *first_node)
{
ezxml_t ret;
char name_copy[256];
ezxml_t px, pk;
if (go_to_parent) return NULL;
// If it's the root of the document choose the first node ("Header" or "Body")
if (xml->parent == NULL) {
px = xml->child;
strcpy(name_copy, first_node);
while (px) {
if (strcmp(first_node, &(px->name)[strlen(px->name) - strlen(first_node)]) == 0) {
ret = get_element_rec_ptr(px, name, first_node);
return ret;
} else {
px = px->ordered;
}
}
// 1st node not found, exit
} else {
// Check if this node is "<name>"
if (strcmp(name, xml->name) == 0) {
return xml;
}
// Check if this node is "<something:name>"
name_copy[0] = ':';
strcpy(&name_copy[1], name);
if (strcmp(name_copy, &(xml->name)[strlen(xml->name) - strlen(name_copy)]) == 0) {
return xml;
}
// Check children
if (xml->child) {
ret = get_element_rec_ptr(xml->child, name, first_node);
go_to_parent = 0;
if (ret != NULL) return ret;
}
// Check brothers
while(pk = xml->ordered) {
ret = get_element_rec_ptr(pk, name, first_node);
if (go_to_parent) return NULL;
if (ret != NULL) return ret;
}
go_to_parent = 1;
}
return NULL;
}
/**
* Get the 1st element with name "name" starting from "first_node"
* @param start_from The element where to start
* @param name The name of the element to find
* @param first_node The 1st level node where to find the element
* @return ezxml_t type pointing to the element, NULL if not found
*/
ezxml_t get_element_ptr(ezxml_t start_from, char *name, char *first_node)
{
ezxml_t ret;
go_to_parent = 0;
if (start_from == NULL)
ret = get_element_rec_ptr(root_xml, name, first_node);
else
ret = get_element_rec_ptr(start_from, name, first_node);
return ret;
}
/**
* Get the child element with name "name" starting from node "father"
* @param name The name of the element to find
* @param father The node where to find the element
* @return A pointer to the value of the element, NULL if not found
*/
const char *get_element_in_element(const char *name, ezxml_t father)
{
char name_copy[256];
ezxml_t child = father->child;
ezxml_t pk;
if (child != NULL) {
// Check if this node is "<name>"
if (strcmp(name, child->name) == 0) {
return child->txt;
}
// Check if this node is "<something:name>"
name_copy[0] = ':';
strcpy(&name_copy[1], name);
if (strcmp(name_copy, &(child->name)[strlen(child->name) - strlen(name_copy)]) == 0) {
return child->txt;
}
// Check brothers
while(pk = child->ordered) {
// Check if this node is "<name>"
if (strcmp(name, pk->name) == 0) {
return pk->txt;
}
// Check if this node is "<something:name>"
name_copy[0] = ':';
strcpy(&name_copy[1], name);
if (strcmp(name_copy, &(pk->name)[strlen(pk->name) - strlen(name_copy)]) == 0) {
return pk->txt;
}
}
}
return NULL;
}
/**
* Get the child element with name "name" starting from node "father"
* @param name The name of the element to find
* @param father The node where to find the element
* @return ezxml_t type pointing to the element, NULL if not found
*/
ezxml_t get_element_in_element_ptr(const char *name, ezxml_t father)
{
char name_copy[256];
ezxml_t child = father->child;
ezxml_t pk;
if (child != NULL) {
// Check if this node is "<name>"
if (strcmp(name, child->name) == 0) {
return child;
}
// Check if this node is "<something:name>"
name_copy[0] = ':';
strcpy(&name_copy[1], name);
if (strcmp(name_copy, &(child->name)[strlen(child->name) - strlen(name_copy)]) == 0) {
return child;
}
// Check brothers
while(pk = child->ordered) {
// Check if this node is "<name>"
if (strcmp(name, pk->name) == 0) {
return pk;
}
// Check if this node is "<something:name>"
name_copy[0] = ':';
strcpy(&name_copy[1], name);
if (strcmp(name_copy, &(pk->name)[strlen(pk->name) - strlen(name_copy)]) == 0) {
return pk;
}
}
}
return NULL;
}
/**
* Get the attribute of a node with name "name"
* @param node The node where to find the attribute
* @param name The name of the attribute to find
* @return A pointer to the value of the attribute, NULL if not found
*/
const char *get_attribute(ezxml_t node, char *name)
{
return ezxml_attr(node, name);
}