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DLList.hP
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1993-06-29
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// This may look like C code, but it is really -*- C++ -*-
// WARNING: This file is obsolete. Use ../DLList.h, if you can.
/*
Copyright (C) 1988 Free Software Foundation
written by Doug Lea (dl@rocky.oswego.edu)
This file is part of the GNU C++ Library. This library is free
software; you can redistribute it and/or modify it under the terms of
the GNU Library General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your
option) any later version. This library is distributed in the hope
that it will be useful, but WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the GNU Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _<T>DLList_h
#ifdef __GNUG__
#pragma interface
#endif
#define _<T>DLList_h 1
#include <Pix.h>
#include "<T>.defs.h"
#ifndef _<T>DLListNode_h
#define _<T>DLListNode_h 1
struct <T>DLListNode
{
<T>DLListNode* bk;
<T>DLListNode* fd;
<T> hd;
<T>DLListNode();
<T>DLListNode(const <T&> h,
<T>DLListNode* p = 0,
<T>DLListNode* n = 0);
~<T>DLListNode();
};
inline <T>DLListNode::<T>DLListNode() {}
inline <T>DLListNode::<T>DLListNode(const <T&> h, <T>DLListNode* p,
<T>DLListNode* n)
:hd(h), bk(p), fd(n) {}
inline <T>DLListNode::~<T>DLListNode() {}
typedef <T>DLListNode* <T>DLListNodePtr;
#endif
class <T>DLList
{
friend class <T>DLListTrav;
<T>DLListNode* h;
public:
<T>DLList();
<T>DLList(const <T>DLList& a);
~<T>DLList();
<T>DLList& operator = (const <T>DLList& a);
int empty();
int length();
void clear();
Pix prepend(<T&> item);
Pix append(<T&> item);
void join(<T>DLList&);
<T>& front();
<T> remove_front();
void del_front();
<T>& rear();
<T> remove_rear();
void del_rear();
<T>& operator () (Pix p);
Pix first();
Pix last();
void next(Pix& p);
void prev(Pix& p);
int owns(Pix p);
Pix ins_after(Pix p, <T&> item);
Pix ins_before(Pix p, <T&> item);
void del(Pix& p, int dir = 1);
void del_after(Pix& p);
void error(const char* msg);
int OK();
};
inline <T>DLList::~<T>DLList()
{
clear();
}
inline <T>DLList::<T>DLList()
{
h = 0;
}
inline int <T>DLList::empty()
{
return h == 0;
}
inline void <T>DLList::next(Pix& p)
{
p = (p == 0 || p == h->bk)? 0 : Pix(((<T>DLListNode*)p)->fd);
}
inline void <T>DLList::prev(Pix& p)
{
p = (p == 0 || p == h)? 0 : Pix(((<T>DLListNode*)p)->bk);
}
inline Pix <T>DLList::first()
{
return Pix(h);
}
inline Pix <T>DLList::last()
{
return (h == 0)? 0 : Pix(h->bk);
}
inline <T>& <T>DLList::operator () (Pix p)
{
if (p == 0) error("null Pix");
return ((<T>DLListNode*)p)->hd;
}
inline <T>& <T>DLList::front()
{
if (h == 0) error("front: empty list");
return h->hd;
}
inline <T>& <T>DLList::rear()
{
if (h == 0) error("rear: empty list");
return h->bk->hd;
}
#endif