#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "list.h"

struct ListHead* list_create()
{
	return calloc(1, sizeof(struct ListHead));
}

int list_add(struct ListHead* head, void* data, size_t size)
{
	assert(head);

	struct ListElem* p = malloc(sizeof(struct ListElem) + size);
	if(!p)
		return -1;

	p->next = NULL;
	p->dataSize = size;
	memcpy((char*)p + sizeof(struct ListElem), data, size);
	p->dataStart = (char*)p + sizeof(struct ListElem);

	// First elem to ever be added?
	if(!head->end)
	{
		head->end = head->start = p;
	}
	else
	{
		head->end->next = p;
		head->end = p;
	}

	return 0;
}

// todo:
int list_free(struct ListHead* head)
{
	struct ListElem* p = head->start;

	while(p)
	{
		struct ListElem* pOld = p;
		p = p->next;

		free(pOld);
	}

	free(head);

	return 0;
}