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Lista.cpp
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Lista.cpp
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#include "Lista.h"
template <typename Tdata>
TList<Tdata>* create_list()
{
TList<Tdata>* l= new TList<Tdata>;
l->first = l->last=l->window=NULL;
return l;
}
template <typename Tdata>
bool IsEmpty(TList<Tdata>* l)
{
if(l!=NULL)
return (l->first==NULL);
}
template <typename Tdata>
void Push_back (TList<Tdata>* l, Tdata info)
{
TLNode<Tdata>* box = new TLNode<Tdata>;
box->info = info;
if(IsEmpty(l))
{
l->first=l->last=l->window=box;
box->prev=box->next=NULL;
}
else
{
l->last->next=box;
box->prev=l->last;
box->next=NULL;
l->last=box;
l->window=box;
}
}
template <typename Tdata>
void Annex (TList<Tdata>* l, Tdata info)
{
TLNode<Tdata>* box = new TLNode<Tdata>;
box->info=info;
if(IsEmpty(l))
Push_back(l,info);
else
{
if(!isEnd(l))
{
if(l->last == l->window)
{
l->last->next=box;
box->next=NULL;
box->prev=l->last;
l->last=box;
}
else
{
box->prev=l->window;
box->next=l->window->next;
l->window->next=box;
box->next->prev=box;
}
l->window=box;
}
}
}
template <typename Tdata>
void Insert (TList<Tdata>* l, Tdata info)
{
TLNode<Tdata>* box = new TLNode<Tdata>;
box->info=info;
if(IsEmpty(l))
Push_back(l,info);
else
{
if(!isEnd(l))
{
if(l->first == l->window)
{
l->first->prev=box;
box->next=l->first;
box->prev=NULL;
l->first=box;
}
else
{
box->next=l->window;
box->prev=l->window->prev;
l->window->prev=box;
box->prev->next=box;
}
l->window=box;
}
}
}
template <typename Tdata>
void Gofirst (TList<Tdata>* l)
{
if(l->window!=l->first)
l->window=l->first;
}
template <typename Tdata>
void Golast (TList<Tdata>* l)
{
if(l->window!=l->last)
l->window=l->last;
}
template <typename Tdata>
void Gonext(TList<Tdata>* l)
{
if(!IsEmpty(l)&&!isEnd(l))
l->window=l->window->next;
}
template <typename Tdata>
void Goprev (TList<Tdata>* l)
{
if(!IsEmpty(l)&&!isEnd(l))
l->window=l->window->prev;
}
template <typename Tdata>
bool isEnd (TList<Tdata>* l)
{
return l->window==NULL;
}
template <typename Tdata>
void Erase (TList<Tdata>* l)
{
if(!isEnd(l))
{
if(l->window==l->last)
{
if(l->first==l->last)
l->first=NULL;
l->last=l->last->prev;
delete l->window;
l->window=NULL;
if(l->last!=NULL)
l->last->next=NULL;
}
else
{
if(l->window==l->first)
{
if(l->first==l->last)
l->last=NULL;
l->first=l->first->next;
delete l->window;
l->window=l->first;
if(l->first!=NULL)
l->first->prev=NULL;
}
else
{
l->window->next->prev=l->window->prev;
l->window->prev->next=l->window->next;
TLNode<Tdata>* aux = l->window;
l->window=l->window->next;
delete aux;
}
}
}
}
template <typename Tdata>
void Push_front (TList<Tdata>* l, Tdata info)
{
TLNode<Tdata>* box = new TLNode<Tdata>;
box->info = info;
if(IsEmpty(l))
{
l->first=l->last=l->window=box;
box->prev=box->next=NULL;
}
else
{
l->first->prev=box;
box->next=l->first;
box->prev=NULL;
l->first=box;
l->window=box;
}
}
template <typename Tdata>
TLNode<Tdata>* Middle (TList<Tdata>*l)
{
TLNode<Tdata>* ptr=l->first;
TLNode<Tdata>* ptr2=l->first;
while(ptr2!=NULL&&ptr2!=l->last)
{
ptr=ptr->next;
ptr2=ptr2->next;
if(ptr2!=NULL)
ptr2=ptr2->next;
}
return ptr;
}