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438 lines
12 KiB
438 lines
12 KiB
//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 2000
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//
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// File: genifilt.cxx
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//
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// Contents: C++ filter 'class factory'.
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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#include <pch.cxx>
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#pragma hdrstop
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#include <filtreg.hxx>
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#include "gen.hxx"
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#include "genifilt.hxx"
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#include "genflt.hxx"
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long gulcInstances = 0;
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extern "C" CLSID TYPID_GenIFilter = { /* c4aac357-d152-493b-8c39-d08f575be46e */
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0xc4aac357,
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0xd152,
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0x493b,
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{0x8c, 0x39, 0xd0, 0x8f, 0x57, 0x5b, 0xe4, 0x6e}
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};
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extern "C" CLSID CLSID_GenIFilter = { /* d0c093a9-8f6d-4816-aaad-df054aad0cbc */
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0xd0c093a9,
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0x8f6d,
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0x4816,
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{0xaa, 0xad, 0xdf, 0x05, 0x4a, 0xad, 0x0c, 0xbc}
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};
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extern "C" CLSID CLSID_GenClass = { /* 7322e01d-d56f-494b-a8df-4685cc402f59 */
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0x7322e01d,
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0xd56f,
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0x494b,
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{0xa8, 0xdf, 0x46, 0x85, 0xcc, 0x40, 0x2f, 0x59}
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};
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//+-------------------------------------------------------------------------
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//
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// Method: GenIFilterBase::GenIFilterBase
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//
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// Synopsis: Base constructor
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//
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// Effects: Manages global refcount
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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GenIFilterBase::GenIFilterBase()
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{
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_uRefs = 1;
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InterlockedIncrement( &gulcInstances );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: GenIFilterBase::~GenIFilterBase
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//
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// Synopsis: Base destructor
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//
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// Effects: Manages global refcount
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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GenIFilterBase::~GenIFilterBase()
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{
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InterlockedDecrement( &gulcInstances );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: GenIFilterBase::QueryInterface
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//
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// Synopsis: Rebind to other interface
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//
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// Arguments: [riid] -- IID of new interface
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// [ppvObject] -- New interface * returned here
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//
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// Returns: S_OK if bind succeeded, E_NOINTERFACE if bind failed
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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SCODE STDMETHODCALLTYPE GenIFilterBase::QueryInterface( REFIID riid,
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void ** ppvObject)
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{
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SCODE sc = S_OK;
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if ( 0 == ppvObject )
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return E_INVALIDARG;
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*ppvObject = 0;
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if ( IID_IFilter == riid )
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*ppvObject = (IUnknown *)(IFilter *)this;
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else if ( IID_IPersist == riid )
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*ppvObject = (IUnknown *)(IPersist *)(IPersistFile *)this;
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else if ( IID_IPersistFile == riid )
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*ppvObject = (IUnknown *)(IPersistFile *)this;
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else if ( IID_IUnknown == riid )
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*ppvObject = (IUnknown *)(IPersist *)(IPersistFile *)this;
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else
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sc = E_NOINTERFACE;
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if ( SUCCEEDED( sc ) )
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AddRef();
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return sc;
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} //QueryInterface
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//+-------------------------------------------------------------------------
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//
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// Method: GenIFilterBase::AddRef
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//
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// Synopsis: Increments refcount
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE GenIFilterBase::AddRef()
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{
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return InterlockedIncrement( &_uRefs );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: GenIFilterBase::Release
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//
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// Synopsis: Decrement refcount. Delete if necessary.
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE GenIFilterBase::Release()
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{
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unsigned long uTmp = InterlockedDecrement( &_uRefs );
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if ( 0 == uTmp )
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delete this;
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return(uTmp);
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}
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//+-------------------------------------------------------------------------
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//
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// Method: GenIFilterCF::GenIFilterCF
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//
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// Synopsis: Text IFilter class factory constructor
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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GenIFilterCF::GenIFilterCF()
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{
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_uRefs = 1;
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long c = InterlockedIncrement( &gulcInstances );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: GenIFilterCF::~GenIFilterCF
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//
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// Synopsis: Text IFilter class factory constructor
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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GenIFilterCF::~GenIFilterCF()
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{
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long c = InterlockedDecrement( &gulcInstances );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: GenIFilterCF::QueryInterface
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//
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// Synopsis: Rebind to other interface
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//
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// Arguments: [riid] -- IID of new interface
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// [ppvObject] -- New interface * returned here
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//
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// Returns: S_OK if bind succeeded, E_NOINTERFACE if bind failed
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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SCODE STDMETHODCALLTYPE GenIFilterCF::QueryInterface( REFIID riid,
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void ** ppvObject )
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{
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SCODE sc = S_OK;
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if ( 0 == ppvObject )
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return E_INVALIDARG;
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*ppvObject = 0;
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if ( IID_IClassFactory == riid )
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*ppvObject = (IUnknown *)(IClassFactory *)this;
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else if ( IID_ITypeLib == riid )
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sc = E_NOTIMPL;
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else if ( IID_IUnknown == riid )
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*ppvObject = (IUnknown *)(IClassFactory *)this;
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else
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sc = E_NOINTERFACE;
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if ( SUCCEEDED( sc ) )
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AddRef();
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return sc;
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} //QueryInterface
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//+-------------------------------------------------------------------------
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//
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// Method: GenIFilterCF::AddRef
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//
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// Synopsis: Increments refcount
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE GenIFilterCF::AddRef()
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{
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return InterlockedIncrement( &_uRefs );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: GenIFilterCF::Release
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//
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// Synopsis: Decrement refcount. Delete if necessary.
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE GenIFilterCF::Release()
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{
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unsigned long uTmp = InterlockedDecrement( &_uRefs );
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if ( 0 == uTmp )
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delete this;
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return(uTmp);
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}
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//+-------------------------------------------------------------------------
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//
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// Method: GenIFilterCF::CreateInstance
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//
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// Synopsis: Creates new TextIFilter object
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//
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// Arguments: [pUnkOuter] -- 'Outer' IUnknown
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// [riid] -- Interface to bind
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// [ppvObject] -- Interface returned here
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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SCODE STDMETHODCALLTYPE GenIFilterCF::CreateInstance( IUnknown * pUnkOuter,
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REFIID riid,
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void * * ppvObject )
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{
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GenIFilter * pIUnk = 0;
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SCODE sc = S_OK;
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CTranslateSystemExceptions translate;
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TRY
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{
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pIUnk = new GenIFilter();
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sc = pIUnk->QueryInterface( riid , ppvObject );
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if( SUCCEEDED(sc) )
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pIUnk->Release(); // Release extra refcount from QueryInterface
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}
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CATCH(CException, e)
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{
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Win4Assert( 0 == pIUnk );
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switch( e.GetErrorCode() )
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{
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case E_OUTOFMEMORY:
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sc = (E_OUTOFMEMORY);
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break;
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default:
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sc = (E_UNEXPECTED);
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}
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}
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END_CATCH;
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return (sc);
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}
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//+-------------------------------------------------------------------------
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//
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// Method: GenIFilterCF::LockServer
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//
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// Synopsis: Force class factory to remain loaded
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//
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// Arguments: [fLock] -- TRUE if locking, FALSE if unlocking
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//
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// Returns: S_OK
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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SCODE STDMETHODCALLTYPE GenIFilterCF::LockServer(BOOL fLock)
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{
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if(fLock)
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InterlockedIncrement( &gulcInstances );
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else
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InterlockedDecrement( &gulcInstances );
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return(S_OK);
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}
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//+-------------------------------------------------------------------------
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//
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// Function: DllGetClassObject
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//
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// Synopsis: Ole DLL load class routine
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//
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// Arguments: [cid] -- Class to load
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// [iid] -- Interface to bind to on class object
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// [ppvObj] -- Interface pointer returned here
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//
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// Returns: Text filter class factory
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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extern "C" SCODE STDMETHODCALLTYPE DllGetClassObject( REFCLSID cid,
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REFIID iid,
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void ** ppvObj )
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{
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IUnknown * pResult = 0;
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SCODE sc = S_OK;
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CTranslateSystemExceptions translate;
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TRY
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{
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if ( memcmp( &cid, &CLSID_GenIFilter, sizeof(cid) ) == 0
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|| memcmp( &cid, &CLSID_GenClass, sizeof(cid) ) == 0 )
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pResult = (IUnknown *) new GenIFilterCF;
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else
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sc = E_NOINTERFACE;
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if( pResult )
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{
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sc = pResult->QueryInterface( iid, ppvObj );
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pResult->Release(); // Release extra refcount from QueryInterface
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}
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}
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CATCH(CException, e)
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{
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if ( pResult )
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pResult->Release();
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switch( e.GetErrorCode() )
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{
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case E_OUTOFMEMORY:
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sc = (E_OUTOFMEMORY);
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break;
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default:
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sc = (E_UNEXPECTED);
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}
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}
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END_CATCH;
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return (sc);
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}
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//+-------------------------------------------------------------------------
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//
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// Method: DllCanUnloadNow
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//
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// Synopsis: Notifies DLL to unload (cleanup global resources)
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//
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// Returns: S_OK if it is acceptable for caller to unload DLL.
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//
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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extern "C" SCODE STDMETHODCALLTYPE DllCanUnloadNow( void )
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{
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if ( 0 == gulcInstances )
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return( S_OK );
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else
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return( S_FALSE );
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}
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SClassEntry const aGenClasses[] =
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{
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{ L".el", L"GenFile", L"Class for generic files", L"{7322e01d-d56f-494b-a8df-4685cc402f59}", L"Class for generic files" },
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// { L".pl", L"GenFile", L"Class for generic files", L"{7322e01d-d56f-494b-a8df-4685cc402f59}", L"Class for generic files" },
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// { L".pm", L"GenFile", L"Class for generic files", L"{7322e01d-d56f-494b-a8df-4685cc402f59}", L"Class for generic files" },
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};
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SHandlerEntry const GenHandler =
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{
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L"{f7a89b42-365d-4f41-b480-f210a449410e}",
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L"Generic persistent handler",
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L"{d0c093a9-8f6d-4816-aaad-df054aad0cbc}",
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};
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SFilterEntry const GenFilter =
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{
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L"{d0c093a9-8f6d-4816-aaad-df054aad0cbc}",
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L"Generic IFilter",
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L"genflt.dll",
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L"Both"
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};
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DEFINE_DLLREGISTERFILTER( GenHandler, GenFilter, aGenClasses )
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