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LISTIMP.H
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C/C++ Source or Header
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1992-02-18
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18KB
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582 lines
/*------------------------------------------------------------------------*/
/* */
/* LISTIMP.H */
/* */
/* Copyright Borland International 1991 */
/* All Rights Reserved */
/* */
/*------------------------------------------------------------------------*/
#if !defined( __LISTIMP_H )
#define __LISTIMP_H
#if !defined( ___DEFS_H )
#include <_defs.h>
#endif // ___DEFS_H
#if !defined( __MEMMGR_H )
#include <MemMgr.h>
#endif // __MEMMGR_H
/*------------------------------------------------------------------------*/
/* */
/* template <class T> class BI_ListElement */
/* */
/* Node for templates BI_ListImp<T> and BI_IListImp<T> */
/* */
/*------------------------------------------------------------------------*/
template <class T> class _CLASSTYPE BI_ListImp;
template <class T> class _CLASSTYPE BI_ListBlockInitializer
{
protected:
BI_ListBlockInitializer()
{
PRECONDITION( count != UINT_MAX );
if( count++ == 0 )
BI_ListElement<T>::mgr =
new MemBlocks( sizeof(BI_ListElement<T>), 20 );
}
~BI_ListBlockInitializer()
{
PRECONDITION( count != 0 );
if( --count == 0 )
{
delete BI_ListElement<T>::mgr;
BI_ListElement<T>::mgr = 0;
}
}
static unsigned count;
};
template <class T> unsigned BI_ListBlockInitializer<T>::count = 0;
template <class T> class _CLASSTYPE BI_ListElement
{
public:
BI_ListElement( T t, BI_ListElement<T> _FAR *p ) :
data(t)
{
next = p->next;
p->next = this;
}
BI_ListElement();
BI_ListElement<T> _FAR *next;
T data;
void _FAR *operator new( size_t sz );
void operator delete( void _FAR * );
private:
friend class BI_ListBlockInitializer<T>;
static MemBlocks *mgr;
};
template <class T> MemBlocks *BI_ListElement<T>::mgr = 0;
template <class T> inline BI_ListElement<T>::BI_ListElement()
{
next = 0;
}
template <class T> void _FAR *BI_ListElement<T>::operator new( size_t sz )
{
PRECONDITION( mgr != 0 );
return mgr->allocate( sz );
}
template <class T> void BI_ListElement<T>::operator delete( void _FAR *b )
{
PRECONDITION( mgr != 0 );
mgr->free( b );
}
inline BI_ListElement<void _FAR *>::BI_ListElement()
{
next = 0;
data = 0;
}
/*------------------------------------------------------------------------*/
/* */
/* template <class T> class BI_ListImp */
/* */
/* Implements a list of objects of type T. Assumes that */
/* T has meaningful copy semantics and a default constructor. */
/* */
/*------------------------------------------------------------------------*/
template <class T> class _CLASSTYPE BI_ListIteratorImp;
template <class T> class _CLASSTYPE BI_ListImp :
private BI_ListBlockInitializer<T>
{
public:
friend class BI_ListIteratorImp<T>;
BI_ListImp()
{
initList();
}
~BI_ListImp()
{
flush();
}
T peekHead() const
{
return head.next->data;
}
void add( T );
void detach( T, int = 0 );
void flush( int del = 0 );
int isEmpty() const
{
return head.next == &tail;
}
void forEach( void (_FAR *)(T _FAR &, void _FAR *), void _FAR * );
T _FAR *firstThat( int (_FAR *)(const T _FAR &, void _FAR *),
void _FAR *
) const;
T _FAR *lastThat( int (_FAR *)(const T _FAR &, void _FAR *),
void _FAR *
) const;
protected:
BI_ListElement<T> head, tail;
virtual BI_ListElement<T> _FAR *findDetach( T t )
{
return findPred(t);
}
virtual BI_ListElement<T> _FAR *findPred( T );
private:
virtual void removeData( BI_ListElement<T> _FAR * )
{
}
void initList();
};
template <class T> void BI_ListImp<T>::initList()
{
head.next = &tail;
tail.next = &tail;
}
template <class T> void BI_ListImp<T>::add( T toAdd )
{
new BI_ListElement<T>( toAdd, &head );
}
template <class T> BI_ListElement<T> _FAR *BI_ListImp<T>::findPred( T t )
{
tail.data = t;
BI_ListElement<T> _FAR *cursor = &head;
while( !(t == cursor->next->data) )
cursor = cursor->next;
return cursor;
}
template <class T> void BI_ListImp<T>::detach( T toDetach, int del )
{
BI_ListElement<T> _FAR *pred = findDetach( toDetach );
BI_ListElement<T> _FAR *item = pred->next;
if( item != &tail )
{
pred->next = pred->next->next;
if( del != 0 )
removeData( item );
delete item;
}
}
template <class T> void BI_ListImp<T>::flush( int del )
{
BI_ListElement<T> _FAR *current = head.next;
while( current != &tail )
{
BI_ListElement<T> _FAR *temp = current;
current = current->next;
if( del != 0 )
removeData( temp );
delete temp;
}
initList();
}
template <class T>
void BI_ListImp<T>::forEach( void (_FAR *f)(T _FAR &, void _FAR *),
void _FAR *args
)
{
BI_ListElement<T> _FAR *cur = head.next;
while( cur->next != cur )
{
f( cur->data, args );
cur = cur->next;
}
}
template <class T>
T _FAR *BI_ListImp<T>::firstThat( int (_FAR *cond)(const T _FAR &, void _FAR *),
void _FAR *args
) const
{
BI_ListElement<T> _FAR *cur = head.next;
while( cur->next != cur )
if( cond( cur->data, args ) != 0 )
return &(cur->data);
else
cur = cur->next;
return 0;
}
template <class T>
T _FAR *BI_ListImp<T>::lastThat( int (_FAR *cond)(const T _FAR &, void _FAR *),
void _FAR *args
) const
{
T _FAR *res = 0;
BI_ListElement<T> _FAR *cur = head.next;
while( cur->next != cur )
{
if( cond( cur->data, args ) != 0 )
res = &(cur->data);
cur = cur->next;
}
return res;
}
/*------------------------------------------------------------------------*/
/* */
/* template <class T> class BI_SListImp */
/* */
/* Implements a sorted list of objects of type T. Assumes that */
/* T has meaningful copy semantics, a meaningful < operator, and a */
/* default constructor. */
/* */
/*------------------------------------------------------------------------*/
template <class T> class _CLASSTYPE BI_SListImp : public BI_ListImp<T>
{
public:
void add( T );
protected:
virtual BI_ListElement<T> _FAR *findDetach( T t );
virtual BI_ListElement<T> _FAR *findPred( T );
};
template <class T> void BI_SListImp<T>::add( T t )
{
new BI_ListElement<T>( t, findPred(t) );
}
template <class T> BI_ListElement<T> _FAR *BI_SListImp<T>::findDetach( T t )
{
BI_ListElement<T> _FAR *res = findPred(t);
if( res->next->data == t )
return res;
else
return &tail;
}
template <class T> BI_ListElement<T> _FAR *BI_SListImp<T>::findPred( T t )
{
tail.data = t;
BI_ListElement<T> _FAR *cursor = &head;
while( cursor->next->data < t )
cursor = cursor->next;
return cursor;
}
/*------------------------------------------------------------------------*/
/* */
/* template <class T> class BI_ListIteratorImp */
/* */
/* Implements a list iterator. This iterator works with any direct */
/* list. For indirect lists, see BI_IListIteratorImp. */
/* */
/*------------------------------------------------------------------------*/
template <class T> class _CLASSTYPE BI_ListIteratorImp
{
public:
BI_ListIteratorImp( const BI_ListImp<T> _FAR &l )
{
list = &l;
cur = list->head.next;
}
operator int()
{
return cur != &(list->tail);
}
T current()
{
return cur->data;
}
T operator ++ ( int )
{
BI_ListElement<T> _FAR *temp = cur;
cur = cur->next;
return temp->data;
}
T operator ++ ()
{
cur = cur->next;
return cur->data;
}
void restart()
{
cur = list->head.next;
}
private:
const BI_ListImp<T> _FAR *list;
BI_ListElement<T> _FAR *cur;
};
/*------------------------------------------------------------------------*/
/* */
/* template <class T, class Vect> class BI_InternalIListImp */
/* */
/* Implements a list of pointers to objects of type T. */
/* This is implemented through the form of BI_ListImp specified by List. */
/* Since pointers always have meaningful copy semantics, this class */
/* can handle any type of object. */
/* */
/*------------------------------------------------------------------------*/
template <class T, class List> class _CLASSTYPE BI_InternalIListImp :
public List
{
public:
T _FAR *peekHead() const
{
return (T _FAR *)List::peekHead();
}
void add( T _FAR *t )
{
List::add( t );
}
void detach( T _FAR *t, int del = 0 )
{
List::detach( t, del );
}
void forEach( void (_FAR *)(T _FAR &, void _FAR *), void _FAR * );
T _FAR *firstThat( int (_FAR *)(const T _FAR &, void _FAR *),
void _FAR *
) const;
T _FAR *lastThat( int (_FAR *)(const T _FAR &, void _FAR *),
void _FAR *
) const;
protected:
virtual BI_ListElement<void _FAR *> _FAR *findPred( void _FAR * ) = 0;
private:
virtual void removeData( BI_ListElement<void _FAR *> _FAR *block )
{
delete (T _FAR *)(block->data);
}
};
template <class T, class List>
void BI_InternalIListImp<T, List>::forEach( void (_FAR *f)(T _FAR &, void _FAR *),
void _FAR *args
)
{
BI_ListElement<void _FAR *> _FAR *cur = head.next;
while( cur->next != cur )
{
f( *(T _FAR *)cur->data, args );
cur = cur->next;
}
}
template <class T, class List>
T _FAR *BI_InternalIListImp<T, List>::firstThat( int (_FAR *cond)(const T _FAR &, void _FAR *),
void _FAR *args
) const
{
BI_ListElement<void _FAR *> _FAR *cur = head.next;
while( cur->next != cur )
if( cond( *(T _FAR *)(cur->data), args ) != 0 )
return (T _FAR *)cur->data;
else
cur = cur->next;
return 0;
}
template <class T, class List>
T _FAR *BI_InternalIListImp<T, List>::lastThat( int (_FAR *cond)(const T _FAR &, void _FAR *),
void _FAR *args
) const
{
T _FAR *res = 0;
BI_ListElement<void _FAR *> _FAR *cur = head.next;
while( cur->next != cur )
{
if( cond( *(T _FAR *)(cur->data), args ) != 0 )
res = (T _FAR *)(cur->data);
cur = cur->next;
}
return res;
}
/*------------------------------------------------------------------------*/
/* */
/* template <class T> class BI_IListImp */
/* */
/* Implements a list of pointers to objects of type T. */
/* This is implemented through the template BI_InternalIListImp. Since */
/* pointers always have meaningful copy semantics, this class */
/* can handle any type of object. */
/* */
/*------------------------------------------------------------------------*/
template <class T> class _CLASSTYPE BI_IListImp :
public BI_InternalIListImp<T, BI_ListImp<void _FAR *> >
{
protected:
virtual BI_ListElement<void _FAR *> _FAR *findPred( void _FAR * );
};
template <class T>
BI_ListElement<void _FAR *> _FAR *BI_IListImp<T>::findPred( void _FAR *t )
{
tail.data = t;
BI_ListElement<void _FAR *> _FAR *cursor = &head;
while( !(*(T _FAR *)t == *(T _FAR *)(cursor->next->data)) )
cursor = cursor->next;
return cursor;
}
/*------------------------------------------------------------------------*/
/* */
/* template <class T> class BI_ISListImp */
/* */
/* Implements a sorted list of pointers to objects of type T. */
/* This is implemented through the template BI_InternalIListImp. Since */
/* pointers always have meaningful copy semantics, this class */
/* can handle any type of object. */
/* */
/*------------------------------------------------------------------------*/
template <class T> class _CLASSTYPE BI_ISListImp :
public BI_InternalIListImp<T, BI_SListImp<void _FAR *> >
{
protected:
virtual BI_ListElement<void _FAR *> _FAR *findDetach( void _FAR * );
virtual BI_ListElement<void _FAR *> _FAR *findPred( void _FAR * );
};
template <class T>
BI_ListElement<void _FAR *> _FAR *BI_ISListImp<T>::findDetach( void _FAR *t )
{
BI_ListElement<void _FAR *> _FAR *res = findPred(t);
if( *(T _FAR *)(res->next->data) == *(T _FAR *)t )
return res;
else
return &tail;
}
template <class T>
BI_ListElement<void _FAR *> _FAR *BI_ISListImp<T>::findPred( void _FAR *t )
{
tail.data = t;
BI_ListElement<void _FAR *> _FAR *cursor = &head;
while( *(T _FAR *)(cursor->next->data) < *(T _FAR *)t )
cursor = cursor->next;
return cursor;
}
/*------------------------------------------------------------------------*/
/* */
/* template <class T> class BI_IListIteratorImp */
/* */
/* Implements a list iterator. This iterator works with any indirect */
/* list. For direct lists, see BI_ListIteratorImp. */
/* */
/*------------------------------------------------------------------------*/
template <class T>
class _CLASSTYPE BI_IListIteratorImp : public BI_ListIteratorImp<void _FAR *>
{
public:
BI_IListIteratorImp( const BI_ListImp<void _FAR *> _FAR &l ) :
BI_ListIteratorImp<void _FAR *>(l) {}
T _FAR *current()
{
return (T _FAR *)BI_ListIteratorImp<void _FAR *>::current();
}
T _FAR *operator ++ (int)
{
return (T _FAR *)BI_ListIteratorImp<void _FAR *>::operator ++ (1);
}
T _FAR *operator ++ ()
{
return (T _FAR *)BI_ListIteratorImp<void _FAR *>::operator ++ ();
}
};
#endif // __LISTIMP_H