81 lines
1.8 KiB
C++
81 lines
1.8 KiB
C++
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/*
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*
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* Copyright (c) 1998,1999 Microsoft Corporation. All rights reserved.
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* EXEMPT: copyright change only, no build required
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*
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*/
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#ifndef _RAWSTACK_HXX
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#define _RAWSTACK_HXX
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#pragma once
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//===========================================================================
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// This is a raw stack based on a contiguous block of memory that is divided
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// up into chunks.
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//
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// This is a Non-GC class because it is used in the tokenizer.
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//
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class RawStack
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{
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public:
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RawStack(long entrySize, long growth);
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~RawStack();
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protected:
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inline char* _push() { if (_ncSize == _ncUsed) return __push(); return &_pStack[_lEntrySize * _ncUsed++]; }
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inline char* _pop() { if (_ncUsed > 0) _ncUsed--; return _peek(); }
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inline char* _peek() { if (_ncUsed == 0) return NULL; return &_pStack[_lEntrySize * (_ncUsed - 1)]; }
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inline char* _item(long index) { return &_pStack[_lEntrySize * index]; }
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long _lEntrySize;
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char* _pStack;
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long _ncUsed;
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long _ncSize;
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long _lGrowth;
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private:
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char* __push();
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};
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//===========================================================================
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// This class implements a raw stack of C primitive types (or structs).
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template <class T> class _rawstack : public RawStack
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{
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public:
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_rawstack<T>(long growth) : RawStack(sizeof(T),growth)
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{
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}
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T* push()
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{
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return (T*)_push();
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}
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T* pop()
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{
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return (T*)_pop();
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}
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T* peek()
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{
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return (T*)_peek();
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}
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long size()
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{
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return _ncSize;
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}
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long used()
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{
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return _ncUsed;
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}
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T* operator[](long index)
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{
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return (T*)_item(index);
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}
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};
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#endif _RAWSTACK_HXX
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