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Brian Harris
2012-11-26 12:58:24 -06:00
parent a5214f79ef
commit 5016f605b8
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neo/idlib/containers/Stack.h Normal file
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/*
===========================================================================
Doom 3 BFG Edition GPL Source Code
Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company.
This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").
Doom 3 BFG Edition Source Code 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 3 of the License, or
(at your option) any later version.
Doom 3 BFG Edition Source Code 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 Doom 3 BFG Edition Source Code. If not, see <http://www.gnu.org/licenses/>.
In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code. If not, please request a copy in writing from id Software at the address below.
If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
===========================================================================
*/
#ifndef __STACK_H__
#define __STACK_H__
/*
===============================================================================
Stack template
===============================================================================
*/
#define idStack( type, next ) idStackTemplate<type, (int)&(((type*)NULL)->next)>
template< class type, int nextOffset >
class idStackTemplate {
public:
idStackTemplate();
void Add( type *element );
type * Get();
private:
type * top;
type * bottom;
};
#define STACK_NEXT_PTR( element ) (*(type**)(((byte*)element)+nextOffset))
template< class type, int nextOffset >
idStackTemplate<type,nextOffset>::idStackTemplate() {
top = bottom = NULL;
}
template< class type, int nextOffset >
void idStackTemplate<type,nextOffset>::Add( type *element ) {
STACK_NEXT_PTR(element) = top;
top = element;
if ( !bottom ) {
bottom = element;
}
}
template< class type, int nextOffset >
type *idStackTemplate<type,nextOffset>::Get() {
type *element;
element = top;
if ( element ) {
top = STACK_NEXT_PTR(top);
if ( bottom == element ) {
bottom = NULL;
}
STACK_NEXT_PTR(element) = NULL;
}
return element;
}
#endif /* !__STACK_H__ */