We are going to parse an XML sample file and print the data to stdout.
Like all examples we start by including Eina: 
 We declare 2 booleans to keep track of tags: 
#define EINA_FALSE
boolean value FALSE (numerical value 0)
Definition: eina_types.h:533
unsigned char Eina_Bool
Type to mimic a boolean.
Definition: eina_types.h:527
  Here we declare some variables and initialize eina: 
 
int
main(void)
{
   FILE *file;
   long size;
   char *buffer;
 
int eina_init(void)
Initializes the Eina library.
Definition: eina_main.c:279
Type for an array of data.
Definition: eina_array.h:229
 We fill buffer with the XML data from chat.xml: 
 
   if ((file = fopen("chat.xml", "rb")))
     {
        fseek(file, 0, SEEK_END);
        size = ftell(file);
        fseek(file, 0, SEEK_SET);
 
        if (size < 0)
          {
             return 0;
          }
 
        if ((buffer = malloc(size)))
          {
             if (fread(buffer, 1, size, file) != (unsigned long)size)
#define EINA_LOG_ERR(fmt,...)
Logs a message with level ERROR on the default domain with the specified format.
Definition: eina_log.h:376
 We will use an Eina_Array to store the data: 
Eina_Array * eina_array_new(unsigned int step)
Creates a new array.
Definition: eina_array.c:276
  Here we call eina_simple_xml_parse(). We pass the buffer with data, its size, we ask to strip leading and trailing whitespace, we give the callback function and the array to store the formatted data: 
                                   _xml_tag_cb, array);
Eina_Bool eina_simple_xml_parse(const char *buf, unsigned buflen, Eina_Bool strip, Eina_Simple_XML_Cb func, const void *data)
Parses a section of XML string text.
Definition: eina_simple_xml_parser.c:284
#define EINA_TRUE
boolean value TRUE (numerical value 1)
Definition: eina_types.h:539
  This will loop over the array and print the data using _print callback: 
static Eina_Bool eina_array_foreach(Eina_Array *array, Eina_Each_Cb cb, void *fdata)
Iterates over an array using a callback function.
  This is the main XML parser callback, it will check for known tags and get the corresponding values: 
_xml_tag_cb(void *data, Eina_Simple_XML_Type type, const char *content,
{
   char buffer[length+1];
   char str[512] = {'\0'};
#define EINA_UNUSED
Used to indicate that a function parameter is purposely unused.
Definition: eina_types.h:339
  We first check for opening tag: 
@ EINA_SIMPLE_XML_OPEN
Definition: eina_simple_xml_parser.h:195
  If we know the tag should have attributes, then we find them using eina_simple_xml_tag_attributes_find() and give them to another parsing function using eina_simple_xml_attributes_parse(): 
     {
        if(!strncmp("post", content, strlen("post")))
          {
                                                                    length);
                                              _xml_attr_cb, str);
Eina_Bool eina_simple_xml_attributes_parse(const char *buf, unsigned buflen, Eina_Simple_XML_Attribute_Cb func, const void *data)
Given a buffer with xml attributes, parse them to key=value pairs.
Definition: eina_simple_xml_parser.c:501
const char * eina_simple_xml_tag_attributes_find(const char *buf, unsigned buflen)
Given the contents of a tag, find where the attributes start.
Definition: eina_simple_xml_parser.c:476
 We check for other known tags: 
          }
        else if (!strncmp("login>", content, strlen("login>")))
          {
          }
        else if (!strncmp("message>", content, strlen("message>")))
          {
 We then check data for corresponding tag: 
          }
     }
     {
          {
@ EINA_SIMPLE_XML_DATA
Definition: eina_simple_xml_parser.h:198
size_t eina_strlcat(char *dst, const char *src, size_t siz)
Appends a c-string.
Definition: eina_str.c:349
size_t eina_strlcpy(char *dst, const char *src, size_t siz)
Copies a c-string to another.
Definition: eina_str.c:317
 We are doing the formatting in same time and put all the <post> children in str. 
 Finally, we store our string in the array: 
static Eina_Bool eina_array_push(Eina_Array *array, const void *data)
Appends a data item to an array.
  This is the callback to parse the attributes, we check for key name and keep the value: 
_xml_attr_cb(void *data, const char *key, const char *value)
{
   char *str = data;
 
   if(!strcmp("id", key))
   {
      snprintf(str, sizeof(value) + 3, "(%s) ", value);
  This is the function that simply print items of the array: 
 You can see the full source code here.