windows-nt/Source/XPSP1/NT/enduser/stuff/itss/txfac.cpp

62 lines
2.1 KiB
C++
Raw Normal View History

2020-09-26 03:20:57 -05:00
// txfac.cpp -- Class factory for LZX transform instances
#include "stdafx.h"
STDMETHODIMP CLZX_TransformFactory::Create(IUnknown *punkOuter, REFIID riid, PVOID *ppv)
{
PCLZX_TransformFactory pTxFac = New CLZX_TransformFactory(punkOuter);
if (pTxFac == NULL)
return STG_E_INSUFFICIENTMEMORY;
HRESULT hr = pTxFac->m_ImpITXFactory.Init();
if (hr == S_OK)
hr = pTxFac->QueryInterface(riid, ppv);
if (hr != S_OK)
delete pTxFac;
return hr;
}
HRESULT STDMETHODCALLTYPE CLZX_TransformFactory::CImpITransformFactory::DefaultControlData
(XformControlData **ppXFCD)
{
LZX_Control_Data *pXFCD = PLZX_Control_Data(OLEHeap()->Alloc(sizeof(LZX_Control_Data)));
if (!pXFCD)
return E_OUTOFMEMORY;
pXFCD->cdwControlData = 6;
pXFCD->dwLZXMagic = LZX_MAGIC;
pXFCD->dwVersion = LZX_Current_Version;
pXFCD->dwMulResetBlock = RESET_BLOCK_SIZE;
pXFCD->dwMulWindowSize = WINDOW_SIZE;
pXFCD->dwMulSecondPartition = SECOND_PARTITION_SIZE;
pXFCD->dwOptions = LXZ_DEF_OPT_FLAGS;
*ppXFCD = PXformControlData(pXFCD);
return NO_ERROR;
}
HRESULT STDMETHODCALLTYPE CLZX_TransformFactory::CImpITransformFactory::CreateTransformInstance
(ITransformInstance *pITxInstMedium, // Container data span for transformed data
ULARGE_INTEGER cbUntransformedSize, // Untransformed size of data
PXformControlData pXFCD, // Control data for this instance
const CLSID *rclsidXForm, // Transform Class ID
const WCHAR *pwszDataSpaceName, // Data space name for this instance
ITransformServices *pXformServices, // Utility routines
IKeyInstance *pKeyManager, // Interface to get enciphering keys
ITransformInstance **ppTransformInstance // Out: Instance transform interface
)
{
return CTransformInstance::Create
(pITxInstMedium, cbUntransformedSize, pXFCD,
rclsidXForm, pwszDataSpaceName,
pXformServices, pKeyManager, ppTransformInstance
);
}