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- // This may look like C code, but it is really -*- C++ -*-
- /*
- Copyright (C) 1988, 1992 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 _SLList_h
- #ifdef __GNUG__
- //#pragma interface
- #endif
- #define _SLList_h 1
-
- #include <xpix.h>
-
- struct BaseSLNode
- {
- BaseSLNode *tl;
- void *item() {return (void*)(this+1);} // Return ((SLNode<T>*)this)->hd
- };
-
- template<class T>
- class SLNode : public BaseSLNode
- {
- public:
- T hd; // Data part of node
- SLNode() { }
- SLNode(const T& h, SLNode* t = 0)
- : hd(h) { tl = t; }
- ~SLNode() { }
- };
-
- extern int __SLListLength(BaseSLNode *ptr);
-
- class BaseSLList {
- protected:
- BaseSLNode *last;
- virtual void delete_node(BaseSLNode*node) = 0;
- virtual BaseSLNode* copy_node(void* datum) = 0;
- virtual void copy_item(void *dst, void *src) = 0;
- virtual ~BaseSLList() { }
- BaseSLList() { last = 0; }
- void copy(const BaseSLList&);
- BaseSLList& operator = (const BaseSLList& a);
- Pix ins_after(Pix p, void *datum);
- Pix prepend(void *datum);
- Pix append(void *datum);
- int remove_front(void *dst, int signal_error = 0);
- void join(BaseSLList&);
- public:
- size_t length();
- void clear();
- Pix prepend(BaseSLNode*);
- Pix append(BaseSLNode*);
- int OK();
- void error(const char* msg);
- void del_after(Pix p);
- int owns(Pix p);
- void del_front();
- };
-
- template <class T>
- class SLList : public BaseSLList
- {
- private:
- virtual void delete_node(BaseSLNode *node) { delete (SLNode<T>*)node; }
- virtual BaseSLNode* copy_node(void *datum)
- { return new SLNode<T>(*(T*)datum); }
- virtual void copy_item(void *dst, void *src) { *(T*)dst = *(T*)src; }
-
- public:
- SLList() : BaseSLList() { }
- SLList(const SLList<T>& a) : BaseSLList() { copy(a); }
- SLList<T>& operator = (const SLList<T>& a)
- { BaseSLList::operator=((const BaseSLList&) a); return *this; }
- virtual ~SLList() { clear(); }
-
- int empty() { return last == 0; }
-
- Pix prepend(T& item) {return BaseSLList::prepend(&item);}
- Pix append(T& item) {return BaseSLList::append(&item);}
- Pix prepend(SLNode<T>* node) {return BaseSLList::prepend(node);}
- Pix append(SLNode<T>* node) {return BaseSLList::append(node);}
-
- T& operator () (Pix p) {
- if (p == 0) error("null Pix");
- return ((SLNode<T>*)(p))->hd; }
- inline Pix first() { return (last == 0)? 0 : Pix(last->tl); }
- void next(Pix& p)
- { p = (p == 0 || p == last)? 0 : Pix(((SLNode<T>*)(p))->tl); }
- Pix ins_after(Pix p, T& item) { return BaseSLList::ins_after(p, &item); }
- void join(SLList<T>& a) { BaseSLList::join(a); }
-
- T& front() {
- if (last == 0) error("front: empty list");
- return ((SLNode<T>*)last->tl)->hd; }
- T& rear() {
- if (last == 0) error("rear: empty list");
- return ((SLNode<T>*)last)->hd; }
- int remove_front(T& x) { return BaseSLList::remove_front(&x); }
- T remove_front() { T dst; BaseSLList::remove_front(&dst, 1); return dst; }
- };
-
- #endif
-