Tizen Native API
3.0
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We are going to parse an XML sample file and print the data to stdout.
Like all examples we start by including Eina:
#include <Eina.h>
We declare 2 booleans to keep track of tags:
Eina_Bool tag_login = EINA_FALSE; Eina_Bool tag_message = EINA_FALSE;
Here we declare some variables and initialize eina:
int main(void) { FILE *file; long size; char *buffer; Eina_Array *array; eina_init();
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 ((buffer = malloc(size))) { fread(buffer, 1, size, file);
We will use an Eina_Array to store the data:
array = eina_array_new(10);
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:
eina_simple_xml_parse(buffer, size, EINA_TRUE, _xml_tag_cb, array);
This will loop over the array and print the data using _print callback:
eina_array_foreach(array, _print, NULL);
This is the main XML parser callback, it will check for known tags and get the corresponding values:
static Eina_Bool _xml_tag_cb(void *data, Eina_Simple_XML_Type type, const char *content, unsigned offset EINA_UNUSED, unsigned length) { char buffer[length+1]; Eina_Array *array = data; char str[512];
We first check for opening tag:
if (type == EINA_SIMPLE_XML_OPEN)
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"))) { const char *tags = eina_simple_xml_tag_attributes_find(content, length); eina_simple_xml_attributes_parse(tags, length - (tags - content), _xml_attr_cb, str);
We check for other known tags:
} else if (!strncmp("login>", content, strlen("login>"))) { tag_login = EINA_TRUE; } else if (!strncmp("message>", content, strlen("message>"))) { tag_message = EINA_TRUE;
We then check data for corresponding tag:
} } else if (type == EINA_SIMPLE_XML_DATA) { if (tag_login == EINA_TRUE) { snprintf(buffer, sizeof(buffer), content); strncat(str, "<", 1); strncat(str, buffer, sizeof(buffer)); strncat(str, "> ", 2); tag_login = EINA_FALSE;
We are doing the formatting in same time and put all the <post> children in str.
} else if (tag_message == EINA_TRUE) { snprintf(buffer, sizeof(buffer), content); strncat(str, buffer, sizeof(buffer)); tag_message = EINA_FALSE;
Finally, we store our string in the array:
eina_array_push(array, strdup(str));
This is the callback to parse the attributes, we check for key name and keep the value:
static Eina_Bool _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:
} return EINA_TRUE;
You can see the full source code here.