Tizen Native API
4.0
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We start by including necessary headers, declaring variables, and initializing eina:
#include <stdio.h> #include <Eina.h> int main(int argc EINA_UNUSED, char **argv EINA_UNUSED) { const char *strings[] = { "even", "odd", "even", "odd", "even", "odd", "even", "odd", "even", "odd" }; const char *more_strings[] = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" }; Eina_Array *array; Eina_List *list = NULL; Eina_Accessor *acc; unsigned short int i; void *data; eina_init();
Next we populate our array and list:
array = eina_array_new(10); for (i = 0; i < 10; i++) { eina_array_push(array, strings[i]); list = eina_list_append(list, more_strings[i]); }
Now that we have two containers populated we can actually start the example and create an accessor:
acc = eina_array_accessor_new(array);
Once we have the accessor we can use it to access certain elements in the container:
for(i = 1; i < 10; i += 2) { eina_accessor_data_get(acc, i, &data); printf("%s\n", (const char *)data); }
- Note:
- Unlike iterators accessors allow us non-linear access, which allows us to print only the odd elements in the container.
As with every other resource we allocate we need to free the accessor(and the array):
eina_accessor_free(acc); eina_array_free(array);
Now we create another accessor, this time for the list:
acc = eina_list_accessor_new(list);
And now the interesting part, we use the same code we used above, to print parts of the array, to print parts of the list:
for(i = 1; i < 10; i += 2) { eina_accessor_data_get(acc, i, &data); printf("%s\n", (const char *)data); }
And to free the list we use a gimmick, instead of freeing list, we ask the accessor for its container and we free that:
Finally we shut eina down and leave:
eina_accessor_free(acc); eina_shutdown(); return 0; }
The full source code can be found in the examples folder in the eina_accessor_01.c file.