Initialize void pointer to point to an array
- by idealistikz
Suppose I have the following:
typedef struct {
int itemSize;
int count;
void *list;
} Mystruct;
Mystruct *InitStruct(int itemSize, int count)
{
Mystruct *my = malloc(sizeof(Mystruct));
my->itemSize = itemSize;
my->count = count;
//What is the best way to initialize list? For example:
//my->list = malloc(count * sizeof(void *)); OR
//my->list = malloc(count * sizeof(itemSize));
}
//The following should return a pointer to the element stored at a given index
void *Retrieve(const MyStruct *my, int index)
{
void *item;
//What is the best way to return a pointer to the item at the given index from
//my->list?
}
Mystruct is similar to an array and void *list is supposed to store the elements or pointers to the elements. Mystruct *InitStruct is a function that initializes a Mystruct pointer and void *Retrieve is a function that returns a pointer to the element stored at a given index.
First, how should I initialize void* list? Should it hold the actual elements or be an array of pointers pointing to the elements?
Second, using the void *Retrieve function, how do I return a pointer to the element stored at a given index in my-list?
