forked from bartvdbraak/blender
165 lines
3.7 KiB
C++
165 lines
3.7 KiB
C++
/**
|
|
* $Id$
|
|
*
|
|
* ***** BEGIN GPL LICENSE BLOCK *****
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
|
|
* All rights reserved.
|
|
*
|
|
* The Original Code is: all of this file.
|
|
*
|
|
* Contributor(s): none yet.
|
|
*
|
|
* ***** END GPL LICENSE BLOCK *****
|
|
*/
|
|
#ifndef __SG_QLIST
|
|
#define __SG_QLIST
|
|
|
|
#include "SG_DList.h"
|
|
|
|
/**
|
|
* Double-Double circular linked list
|
|
* For storing an object is two lists simultaneously
|
|
*/
|
|
class SG_QList : public SG_DList
|
|
{
|
|
protected :
|
|
SG_QList* m_fqlink;
|
|
SG_QList* m_bqlink;
|
|
|
|
public:
|
|
template<typename T> class iterator
|
|
{
|
|
private:
|
|
SG_QList& m_head;
|
|
T* m_current;
|
|
public:
|
|
typedef iterator<T> _myT;
|
|
iterator(SG_QList& head, SG_QList* current=NULL) : m_head(head) { m_current = (T*)current; }
|
|
~iterator() {}
|
|
|
|
void begin()
|
|
{
|
|
m_current = (T*)m_head.QPeek();
|
|
}
|
|
void back()
|
|
{
|
|
m_current = (T*)m_head.QBack();
|
|
}
|
|
bool end()
|
|
{
|
|
return (m_current == (T*)m_head.Self());
|
|
}
|
|
bool add_back(T* item)
|
|
{
|
|
return m_current->QAddBack(item);
|
|
}
|
|
T* operator*()
|
|
{
|
|
return m_current;
|
|
}
|
|
_myT& operator++()
|
|
{
|
|
m_current = (T*)m_current->QPeek();
|
|
return *this;
|
|
}
|
|
_myT& operator--()
|
|
{
|
|
// no check on NULL! make sure you don't try to increment beyond end
|
|
m_current = (T*)m_current->QBack();
|
|
return *this;
|
|
}
|
|
};
|
|
|
|
SG_QList() : SG_DList()
|
|
{
|
|
m_fqlink = m_bqlink = this;
|
|
}
|
|
SG_QList(const SG_QList& other) : SG_DList()
|
|
{
|
|
m_fqlink = m_bqlink = this;
|
|
}
|
|
virtual ~SG_QList()
|
|
{
|
|
QDelink();
|
|
}
|
|
|
|
inline bool QEmpty() // Check for empty queue
|
|
{
|
|
return ( m_fqlink == this );
|
|
}
|
|
bool QAddBack( SG_QList *item ) // Add to the back
|
|
{
|
|
if (!item->QEmpty())
|
|
return false;
|
|
item->m_bqlink = m_bqlink;
|
|
item->m_fqlink = this;
|
|
m_bqlink->m_fqlink = item;
|
|
m_bqlink = item;
|
|
return true;
|
|
}
|
|
bool QAddFront( SG_QList *item ) // Add to the back
|
|
{
|
|
if (!item->Empty())
|
|
return false;
|
|
item->m_fqlink = m_fqlink;
|
|
item->m_bqlink = this;
|
|
m_fqlink->m_bqlink = item;
|
|
m_fqlink = item;
|
|
return true;
|
|
}
|
|
SG_QList *QRemove() // Remove from the front
|
|
{
|
|
if (QEmpty())
|
|
{
|
|
return NULL;
|
|
}
|
|
SG_QList* item = m_fqlink;
|
|
m_fqlink = item->m_fqlink;
|
|
m_fqlink->m_bqlink = this;
|
|
item->m_fqlink = item->m_bqlink = item;
|
|
return item;
|
|
}
|
|
bool QDelink() // Remove from the middle
|
|
{
|
|
if (QEmpty())
|
|
return false;
|
|
m_bqlink->m_fqlink = m_fqlink;
|
|
m_fqlink->m_bqlink = m_bqlink;
|
|
m_fqlink = m_bqlink = this;
|
|
return true;
|
|
}
|
|
inline SG_QList *QPeek() // Look at front without removing
|
|
{
|
|
return m_fqlink;
|
|
}
|
|
inline SG_QList *QBack() // Look at front without removing
|
|
{
|
|
return m_bqlink;
|
|
}
|
|
|
|
|
|
#ifdef WITH_CXX_GUARDEDALLOC
|
|
public:
|
|
void *operator new( unsigned int num_bytes) { return MEM_mallocN(num_bytes, "GE:SG_QList"); }
|
|
void operator delete( void *mem ) { MEM_freeN(mem); }
|
|
#endif
|
|
};
|
|
|
|
#endif //__SG_QLIST
|
|
|