87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
/*
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===========================================================================
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Doom 3 GPL Source Code
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Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).
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Doom 3 Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 Source Code is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 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 Source Code. If not, please request a copy in writing from id Software at the address below.
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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.
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===========================================================================
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*/
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#ifndef __STACK_H__
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#define __STACK_H__
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/*
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===============================================================================
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Stack template
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===============================================================================
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*/
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#define idStack( type, next ) idStackTemplate<type, (int)&(((type*)NULL)->next)>
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template< class type, int nextOffset >
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class idStackTemplate {
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public:
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idStackTemplate( void );
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void Add( type *element );
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type * Get( void );
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private:
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type * top;
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type * bottom;
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};
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#define STACK_NEXT_PTR( element ) (*(type**)(((byte*)element)+nextOffset))
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template< class type, int nextOffset >
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idStackTemplate<type,nextOffset>::idStackTemplate( void ) {
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top = bottom = NULL;
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}
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template< class type, int nextOffset >
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void idStackTemplate<type,nextOffset>::Add( type *element ) {
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STACK_NEXT_PTR(element) = top;
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top = element;
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if ( !bottom ) {
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bottom = element;
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}
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}
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template< class type, int nextOffset >
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type *idStackTemplate<type,nextOffset>::Get( void ) {
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type *element;
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element = top;
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if ( element ) {
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top = STACK_NEXT_PTR(top);
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if ( bottom == element ) {
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bottom = NULL;
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}
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STACK_NEXT_PTR(element) = NULL;
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}
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return element;
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}
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#endif /* !__STACK_H__ */
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