145 lines
3.8 KiB
C
145 lines
3.8 KiB
C
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/* @doc INTERNAL
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*
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* @module _ARRAY.H Generic Array Class |
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*
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* This module declares a generic array class for constant sized
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* elements (although the elements themselves may be of any size).
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*
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* Original Author: <nl>
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* Christian Fortini
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*
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* History: <nl>
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* 6/25/95 alexgo Cleanup and Commenting
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*
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* Copyright (c) 1995-1997, Microsoft Corporation. All rights reserved.
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*/
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#ifndef _ARRAY_H
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#define _ARRAY_H
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class CFormatRunPtr;
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/*
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* ArrayFlag
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*
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* @enum Defines flags used with the array class
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*/
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enum tagArrayFlag
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{
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AF_KEEPMEM = 1, //@emem Don't delete any memory
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AF_DELETEMEM = 2, //@emem Delete as much memory as possible
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};
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//@type ArrayFlag | flags controlling the usage of generic arrays
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//(and specifically how memory is handled)
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typedef enum tagArrayFlag ArrayFlag;
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/*
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* CArrayBase
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*
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* @class The CArrayBase class implements a generic array class. It should
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* never be used directly; use the type-safe template, <c CArray>, instead.
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*
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* @devnote There are exactly two legal states for an array: empty or not.
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* If an array is empty, the following must be true:
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*
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* <md CArrayBase::_prgel> == NULL; <nl>
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* <md CArrayBase::_cel> == 0; <nl>
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* <md CArrayBase::_celMax> == 0;
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*
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* Otherwise, the following must be true:
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*
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* <md CArrayBase::_prgel> != NULL; <nl>
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* <md CArrayBase::_cel> <lt>= <md CArrayBase::_celMax>; <nl>
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* <md CArrayBase::_celMax> <gt> 0;
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*
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*
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* An array starts empty, transitions to not-empty as elements are inserted
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* and will transistion back to empty if all of the array elements are
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* removed.
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*
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*/
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class CArrayBase
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{
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//@access Public Methods
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public:
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#ifdef DEBUG
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BOOL Invariant() const; //@cmember Validates state consistentency
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void* Elem(LONG iel) const; //@cmember Get ptr to <p iel>'th run
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#else
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void* Elem(LONG iel) const {return _prgel + iel*_cbElem;}
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#endif
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CArrayBase (LONG cbElem); //@cmember Constructor
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~CArrayBase () {Clear(AF_DELETEMEM);}
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void Clear (ArrayFlag flag); //@cmember Delete all runs in array
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LONG Count() const {return _cel;}//@cmember Get count of runs in array
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//@cmember Remove <p celFree> runs from
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// array, starting at run <p ielFirst>
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void Remove(LONG ielFirst, LONG celFree);
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//@cmember Replace runs <p iel> through
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// <p iel+cel-1> with runs from <p par>
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BOOL Replace (LONG iel, LONG cel, CArrayBase *par);
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LONG Size() const {return _cbElem;}//@cmember Get size of a run
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//@access Protected Methods
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protected:
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void* ArAdd (LONG cel, LONG *pielIns); //@cmember Add <p cel> runs
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void* ArInsert(LONG iel, LONG celIns); //@cmember Insert <p celIns>
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// runs
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//@access Protected Data
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protected:
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char* _prgel; //@cmember Pointer to actual array data
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LONG _cel; //@cmember Count of used entries in array
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LONG _celMax; //@cmember Count of allocated entries in array
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LONG _cbElem; //@cmember Byte count of an individual array element
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};
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/*
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* CArray
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*
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* @class
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* An inline template class providing type-safe access to CArrayBase
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*
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* @tcarg class | ELEM | the class or struct to be used as array elements
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*/
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template <class ELEM>
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class CArray : public CArrayBase
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{
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//@access Public Methods
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public:
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CArray () //@cmember Constructor
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: CArrayBase(sizeof(ELEM))
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{}
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ELEM * Elem(LONG iel) const //@cmember Get ptr to <p iel>'th
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{ // element
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return (ELEM *)CArrayBase::Elem(iel);
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}
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ELEM& GetAt(LONG iel) const //@cmember Get <p iel>'th element
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{
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return *(ELEM *)CArrayBase::Elem(iel);
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}
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ELEM* Add (LONG cel, LONG *pielIns) //@cmember Adds <p cel> elements
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{ // to end of array
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return (ELEM*)ArAdd(cel, pielIns);
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}
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ELEM* Insert (LONG iel, LONG celIns) //@cmember Insert <p celIns>
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{ // elements at index <p iel>
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return (ELEM*)ArInsert(iel, celIns);
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}
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};
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#endif
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