/**
* Test the first iterator is before the second.
*/
bool_t _hashtable_iterator_before(_hashtable_iterator_t it_first, _hashtable_iterator_t it_second)
{
_hashtable_iterator_t it_iter;
_hashtable_t* pt_hashtable = NULL;
assert(_hashtable_iterator_belong_to_hashtable(_HASHTABLE_ITERATOR_HASHTABLE(it_first), it_first));
assert(_hashtable_iterator_belong_to_hashtable(_HASHTABLE_ITERATOR_HASHTABLE(it_second), it_second));
assert(_HASHTABLE_ITERATOR_HASHTABLE(it_first) == _HASHTABLE_ITERATOR_HASHTABLE(it_second));
if(_HASHTABLE_ITERATOR_COREPOS(it_first) == _HASHTABLE_ITERATOR_COREPOS(it_second))
{
return false;
}
pt_hashtable = _HASHTABLE_ITERATOR_HASHTABLE(it_first);
for(it_iter = it_first;
!_hashtable_iterator_equal(it_iter, _hashtable_end(pt_hashtable));
it_iter = _hashtable_iterator_next(it_iter))
{
if(_hashtable_iterator_equal(it_iter, it_second))
{
return true;
}
}
if(_hashtable_iterator_equal(it_second, _hashtable_end(pt_hashtable)))
{
return true;
}
else
{
return false;
}
}
/*
* Erase a range of element in an hashtable.
*/
void _hashtable_erase_range(
_hashtable_t* pt_hashtable, _hashtable_iterator_t it_begin, _hashtable_iterator_t it_end)
{
_hashtable_iterator_t it_iter;
_hashtable_iterator_t it_next;
assert(pt_hashtable != NULL);
assert(_hashtable_is_inited(pt_hashtable));
assert(_hashtable_iterator_belong_to_hashtable(pt_hashtable, it_begin));
assert(_hashtable_iterator_belong_to_hashtable(pt_hashtable, it_end));
assert(_hashtable_iterator_equal(it_begin, it_end) || _hashtable_iterator_before(it_begin, it_end));
it_iter = it_next = it_begin;
if(!_hashtable_iterator_equal(it_next, _hashtable_end(pt_hashtable)))
{
it_next = _hashtable_iterator_next(it_next);
}
while(!_hashtable_iterator_equal(it_iter, it_end))
{
_hashtable_erase_pos(pt_hashtable, it_iter);
it_iter = it_next;
if(!_hashtable_iterator_equal(it_next, _hashtable_end(pt_hashtable)))
{
it_next = _hashtable_iterator_next(it_next);
}
}
}
/**
* Test the two hashtable iterator are equal.
*/
bool_t _hashtable_iterator_equal(_hashtable_iterator_t it_first, _hashtable_iterator_t it_second)
{
assert(_hashtable_iterator_belong_to_hashtable(_HASHTABLE_ITERATOR_HASHTABLE(it_first), it_first));
assert(_hashtable_iterator_belong_to_hashtable(_HASHTABLE_ITERATOR_HASHTABLE(it_second), it_second));
assert(_HASHTABLE_ITERATOR_HASHTABLE(it_first) == _HASHTABLE_ITERATOR_HASHTABLE(it_second));
if(_HASHTABLE_ITERATOR_BUCKETPOS(it_first) == _HASHTABLE_ITERATOR_BUCKETPOS(it_second) &&
_HASHTABLE_ITERATOR_COREPOS(it_first) == _HASHTABLE_ITERATOR_COREPOS(it_second))
{
return true;
}
else
{
return false;
}
}
/**
* Return iterator reference previous element.
*/
_hashtable_iterator_t _hashtable_iterator_prev(_hashtable_iterator_t it_iter)
{
vector_iterator_t it_bucket;
_hashnode_t* pt_node = NULL;
_hashnode_t* pt_prevnode = NULL;
assert(_hashtable_iterator_belong_to_hashtable(_HASHTABLE_ITERATOR_HASHTABLE(it_iter), it_iter));
assert(!_hashtable_iterator_equal(it_iter, _hashtable_begin(_HASHTABLE_ITERATOR_HASHTABLE(it_iter))));
/* hashtable end is specifical condition. corepos == NULL and bucketpos is invalid pos */
if(_hashtable_iterator_equal(it_iter, _hashtable_end(_HASHTABLE_ITERATOR_HASHTABLE(it_iter))))
{
it_bucket = iterator_prev(vector_end(&_HASHTABLE_ITERATOR_HASHTABLE(it_iter)->_vec_bucket));
_HASHTABLE_ITERATOR_BUCKETPOS(it_iter) = _VECTOR_ITERATOR_COREPOS(it_bucket);
}
pt_node = (_hashnode_t*)_HASHTABLE_ITERATOR_COREPOS(it_iter);
pt_prevnode = *(_hashnode_t**)_HASHTABLE_ITERATOR_BUCKETPOS(it_iter);
/* current node is first node in current bucket */
if(pt_prevnode == pt_node)
{
it_bucket = vector_begin(&(_HASHTABLE_ITERATOR_HASHTABLE(it_iter)->_vec_bucket));
_VECTOR_ITERATOR_COREPOS(it_bucket) = _HASHTABLE_ITERATOR_BUCKETPOS(it_iter);
for(it_bucket = iterator_prev(it_bucket);
iterator_greater_equal(it_bucket, vector_begin(&(_HASHTABLE_ITERATOR_HASHTABLE(it_iter)->_vec_bucket)));
it_bucket = iterator_prev(it_bucket))
{
pt_node = *(_hashnode_t**)_VECTOR_ITERATOR_COREPOS(it_bucket);
if(pt_node != NULL)
{
/* get the last hashnode */
while(pt_node->_pt_next != NULL)
{
pt_node = pt_node->_pt_next;
}
/* set bucket pos and core pos */
_HASHTABLE_ITERATOR_BUCKETPOS(it_iter) = _VECTOR_ITERATOR_COREPOS(it_bucket);
_HASHTABLE_ITERATOR_COREPOS(it_iter) = (_byte_t*)pt_node;
break;
}
}
}
else
{
while(pt_prevnode->_pt_next != pt_node)
{
pt_prevnode = pt_prevnode->_pt_next;
}
/* set core pos */
_HASHTABLE_ITERATOR_COREPOS(it_iter) = (_byte_t*)pt_prevnode;
}
return it_iter;
}
/**
* Get data value pointer referenced by iterator.
*/
const void* _hashtable_iterator_get_pointer(_hashtable_iterator_t it_iter)
{
assert(_hashtable_iterator_belong_to_hashtable(_HASHTABLE_ITERATOR_HASHTABLE(it_iter), it_iter));
assert(!_hashtable_iterator_equal(it_iter, _hashtable_end(_HASHTABLE_ITERATOR_HASHTABLE(it_iter))));
/* char* */
if(strncmp(_GET_HASHTABLE_TYPE_BASENAME(_HASHTABLE_ITERATOR_HASHTABLE(it_iter)), _C_STRING_TYPE, _TYPE_NAME_SIZE) == 0)
{
return (char*)string_c_str((string_t*)((_hashnode_t*)_HASHTABLE_ITERATOR_COREPOS(it_iter))->_pby_data);
}
else
{
return ((_hashnode_t*)_HASHTABLE_ITERATOR_COREPOS(it_iter))->_pby_data;
}
}
/*
* Erase an element in an hashtable from specificed position.
*/
void _hashtable_erase_pos(_hashtable_t* pt_hashtable, _hashtable_iterator_t it_pos)
{
_hashnode_t** ppt_bucket = NULL;
_hashnode_t* pt_node = NULL;
_hashnode_t* pt_deletion = NULL;
bool_t b_result = false;
assert(pt_hashtable != NULL);
assert(_hashtable_is_inited(pt_hashtable));
assert(_hashtable_iterator_belong_to_hashtable(pt_hashtable, it_pos));
assert(!_hashtable_iterator_equal(it_pos, _hashtable_end(pt_hashtable)));
/* get the previous node */
ppt_bucket = (_hashnode_t**)_GET_HASHTABLE_BUCKETPOS(it_pos);
pt_node = *ppt_bucket;
pt_deletion = (_hashnode_t*)_GET_HASHTABLE_COREPOS(it_pos);
if(pt_node == pt_deletion)
{
/* the deletion node is the first node of node list */
*ppt_bucket = pt_node->_pt_next;
}
else
{
while(pt_node->_pt_next != NULL)
{
if(pt_node->_pt_next == pt_deletion)
{
pt_node->_pt_next = pt_deletion->_pt_next;
break;
}
else
{
pt_node = pt_node->_pt_next;
}
}
}
/* delete the node */
b_result = _GET_HASHTABLE_TYPE_SIZE(pt_hashtable);
_GET_HASHTABLE_TYPE_DESTROY_FUNCTION(pt_hashtable)(pt_deletion->_pby_data, &b_result);
assert(b_result);
_alloc_deallocate(
&pt_hashtable->_t_allocator, pt_deletion, _HASHTABLE_NODE_SIZE(_GET_HASHTABLE_TYPE_SIZE(pt_hashtable)), 1);
/* update the hashtable size */
pt_hashtable->_t_nodecount--;
}
/**
* Get data value referenced by iterator.
*/
void _hashtable_iterator_get_value(_hashtable_iterator_t it_iter, void* pv_value)
{
assert(pv_value != NULL);
assert(_hashtable_iterator_belong_to_hashtable(_HASHTABLE_ITERATOR_HASHTABLE(it_iter), it_iter));
assert(!_hashtable_iterator_equal(it_iter, _hashtable_end(_HASHTABLE_ITERATOR_HASHTABLE(it_iter))));
/* char* */
if(strncmp(_GET_HASHTABLE_TYPE_BASENAME(_HASHTABLE_ITERATOR_HASHTABLE(it_iter)), _C_STRING_TYPE, _TYPE_NAME_SIZE) == 0)
{
*(char**)pv_value = (char*)string_c_str((string_t*)((_hashnode_t*)_HASHTABLE_ITERATOR_COREPOS(it_iter))->_pby_data);
}
else
{
bool_t b_result = _GET_HASHTABLE_TYPE_SIZE(_HASHTABLE_ITERATOR_HASHTABLE(it_iter));
_GET_HASHTABLE_TYPE_COPY_FUNCTION(_HASHTABLE_ITERATOR_HASHTABLE(it_iter))(
pv_value, ((_hashnode_t*)_HASHTABLE_ITERATOR_COREPOS(it_iter))->_pby_data, &b_result);
assert(b_result);
}
}
/**
* Return iterator reference next element.
*/
_hashtable_iterator_t _hashtable_iterator_next(_hashtable_iterator_t it_iter)
{
vector_iterator_t it_bucket;
_hashnode_t* pt_node = NULL;
assert(_hashtable_iterator_belong_to_hashtable(_HASHTABLE_ITERATOR_HASHTABLE(it_iter), it_iter));
assert(!_hashtable_iterator_equal(it_iter, _hashtable_end(_HASHTABLE_ITERATOR_HASHTABLE(it_iter))));
pt_node = (_hashnode_t*)_HASHTABLE_ITERATOR_COREPOS(it_iter);
assert(pt_node != NULL);
if(pt_node->_pt_next == NULL)
{
/* iterator from current bucket pos to end */
it_bucket = vector_begin(&(_HASHTABLE_ITERATOR_HASHTABLE(it_iter)->_vec_bucket));
_VECTOR_ITERATOR_COREPOS(it_bucket) = _HASHTABLE_ITERATOR_BUCKETPOS(it_iter);
for(it_bucket = iterator_next(it_bucket);
!iterator_equal(it_bucket, vector_end(&(_HASHTABLE_ITERATOR_HASHTABLE(it_iter)->_vec_bucket)));
it_bucket = iterator_next(it_bucket))
{
_HASHTABLE_ITERATOR_BUCKETPOS(it_iter) = _VECTOR_ITERATOR_COREPOS(it_bucket);
if(*(_hashnode_t**)_HASHTABLE_ITERATOR_BUCKETPOS(it_iter) != NULL)
{
_HASHTABLE_ITERATOR_COREPOS(it_iter) = (_byte_t*)(*(_hashnode_t**)_HASHTABLE_ITERATOR_BUCKETPOS(it_iter));
break;
}
}
if(iterator_equal(it_bucket, vector_end(&(_HASHTABLE_ITERATOR_HASHTABLE(it_iter)->_vec_bucket))))
{
assert((_hashnode_t*)_HASHTABLE_ITERATOR_COREPOS(it_iter) == pt_node);
_HASHTABLE_ITERATOR_COREPOS(it_iter) = NULL;
_HASHTABLE_ITERATOR_BUCKETPOS(it_iter) = _VECTOR_ITERATOR_COREPOS(it_bucket);
}
}
else
{
_HASHTABLE_ITERATOR_COREPOS(it_iter) = (_byte_t*)pt_node->_pt_next;
}
return it_iter;
}
