167 lines
3.5 KiB
C++
167 lines
3.5 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1997.
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//
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// File: enumstr.hxx
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//
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// Contents: Implementation of IEnumString
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//
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// Classes: CEnumString
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//
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// History: 3-19-97 srikants Created
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//
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//----------------------------------------------------------------------------
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#pragma once
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//+---------------------------------------------------------------------------
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//
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// Class: CEnumString
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//
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// Purpose: A string enumerator class.
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//
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// History: 3-19-97 srikants Created
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//
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// Notes: I have assumed that the pointers returned in the "Next" call
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// are "read only" pointers. If we are required to make copies,
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// we have to change the implementation.
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//
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//----------------------------------------------------------------------------
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class CEnumString : INHERIT_VIRTUAL_UNWIND, public IEnumString
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{
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INLINE_UNWIND( CEnumString );
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public:
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CEnumString( ULONG cInitSize = 16 )
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: _aStr( cInitSize ),
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_iCurrEnum(0),
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_cValid(0),
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_refCount(1)
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{
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END_CONSTRUCTION( CEnumString );
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}
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//
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// IUnknown methods.
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//
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STDMETHOD(QueryInterface) (THIS_ REFIID riid,LPVOID *ppiuk );
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STDMETHOD_(ULONG, AddRef) (THIS);
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STDMETHOD_(ULONG, Release) (THIS);
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//
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// IEnumString methods.
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//
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STDMETHOD(Next) (
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ULONG celt,
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LPOLESTR *rgelt,
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ULONG *pceltFetched);
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STDMETHOD(Skip)(ULONG celt);
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STDMETHOD(Reset) (void)
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{
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_iCurrEnum = 0;
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return S_OK;
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}
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STDMETHOD(Clone) (
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IEnumString ** ppenum);
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//
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// Private methods.
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//
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void Append( WCHAR const * pwszString );
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private:
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long _refCount;
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ULONG _cValid; // Number of valid strings.
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CDynArray<WCHAR> _aStr; // Array of NULL terminated WCHAR * pointers.
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ULONG _iCurrEnum; // Current enumeration context
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};
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//+---------------------------------------------------------------------------
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//
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// Class: CEnumWorkid
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//
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// Purpose: Implementation of ICiEnumWorkids
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//
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// History: 3-19-97 srikants Created
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//
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//----------------------------------------------------------------------------
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class CEnumWorkid : INHERIT_VIRTUAL_UNWIND, public ICiEnumWorkids
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{
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INLINE_UNWIND( CEnumWorkid );
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public:
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//
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// IUnknown methods.
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//
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STDMETHOD(QueryInterface) (THIS_ REFIID riid,LPVOID *ppiuk );
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STDMETHOD_(ULONG, AddRef) (THIS);
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STDMETHOD_(ULONG, Release) (THIS);
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//
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// ICiEnumWorkids methods.
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//
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STDMETHOD(Count) (
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ULONG *pcWorkIds)
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{
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return _cValid;
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}
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STDMETHOD(Reset) (void)
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{
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_iCurrEnum = 0;
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return S_OK;
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}
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STDMETHOD(Next) (
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ULONG celt,
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WORKID * rgelt,
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ULONG * pceltFetched);
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STDMETHOD(Skip) (
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ULONG celt);
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//
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// Private methods.
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//
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CEnumWorkid( ULONG cInitSize = 16 )
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: _aWorkids( cInitSize ),
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_iCurrEnum(0),
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_cValid(0),
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_refCount(1)
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{
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END_CONSTRUCTION( CEnumWorkid );
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}
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void Append( WORKID wid );
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private:
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long _refCount;
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ULONG _cValid; // Number of valid strings.
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CDynArrayInPlace<WORKID>
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_aWorkids; // Array of NULL terminated WCHAR * pointers.
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ULONG _iCurrEnum; // Current enumeration context
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};
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