60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
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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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