//=========================================================================================
// A failure here could leave the list in a bad state.
bool MultiList::Item::Unlink( MultiList* list )
{
ItemData* itemData = FindItemData( list );
if( !itemData )
return false;
Item* left = itemData->left;
Item* right = itemData->right;
if( left )
{
itemData = left->FindItemData( list );
if( !itemData )
return false;
itemData->right = right;
}
if( right )
{
itemData = right->FindItemData( list );
if( !itemData )
return false;
itemData->left = left;
}
itemData = FindItemData( list );
if( !itemDataList.Remove( itemData, false ) )
return false;
if( !list->DeallocateItemData( itemData ) )
return false;
return true;
}
//=========================================================================================
void MultiList::UnbindFromList( List& list )
{
for( Item* item = ( Item* )list.leftMost; item; item = ( Item* )item->right )
{
ItemData* itemData = item->FindItemData( this );
itemData->left = ( Item* )item->left;
itemData->right = ( Item* )item->right;
item->left = 0;
item->right = 0;
item->list = 0;
}
list.leftMost = 0;
list.rightMost = 0;
list.count = 0;
}