212 lines
4.7 KiB
C++
212 lines
4.7 KiB
C++
//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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//
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// Copyright (C) Microsoft Corporation, 1999 - 1999
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//
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// File: objfmts.cpp
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//
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//--------------------------------------------------------------------------
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#include "stdafx.h"
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#include "objfmts.h"
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//____________________________________________________________________________
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//
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// Members: IEnumFORMATETC methods
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//____________________________________________________________________________
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STDMETHODIMP
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CObjFormats::Next(
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ULONG celt,
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FORMATETC *rgelt,
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ULONG *pceltFethed)
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{
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UINT cfetch = 0;
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HRESULT hr = S_FALSE; // assume less numbers
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if (m_iFmt < m_cFmt)
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{
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cfetch = m_cFmt - m_iFmt;
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if (cfetch >= celt)
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{
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cfetch = celt;
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hr = S_OK;
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}
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CopyMemory(rgelt, &m_aFmt[m_iFmt], cfetch * sizeof(FORMATETC));
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m_iFmt += cfetch;
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}
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if (pceltFethed)
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{
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*pceltFethed = cfetch;
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}
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return hr;
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}
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STDMETHODIMP
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CObjFormats::Skip(
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ULONG celt)
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{
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m_iFmt += celt;
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if (m_iFmt > m_cFmt)
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{
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m_iFmt = m_cFmt;
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return S_FALSE;
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}
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return S_OK;
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}
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STDMETHODIMP
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CObjFormats::Reset()
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{
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m_iFmt = 0;
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return S_OK;
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}
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STDMETHODIMP
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CObjFormats::Clone(
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IEnumFORMATETC ** ppenum)
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{
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return E_NOTIMPL;
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}
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//____________________________________________________________________________
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//
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// Function: Function to obtain the IEnumFORMATETC interface.
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//____________________________________________________________________________
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HRESULT
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GetObjFormats(
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UINT cfmt,
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FORMATETC * afmt,
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LPVOID * ppvObj)
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{
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ASSERT(ppvObj != NULL);
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ASSERT(afmt != NULL);
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FORMATETC * pFmt = new FORMATETC[cfmt];
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if (pFmt == NULL)
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return E_OUTOFMEMORY;
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CopyMemory(pFmt, afmt, cfmt * sizeof(FORMATETC));
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CComObject<CObjFormats>* pObjFormats;
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CComObject<CObjFormats>::CreateInstance(&pObjFormats);
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if (pObjFormats == NULL)
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{
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delete [] pFmt;
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return E_OUTOFMEMORY;
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}
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pObjFormats->Init(cfmt, pFmt);
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return pObjFormats->QueryInterface(IID_IEnumFORMATETC,
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reinterpret_cast<void**>(ppvObj));
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}
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//////////....................................................//////////////
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//////////....................................................//////////////
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//////////....................................................//////////////
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//////////....................................................//////////////
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//////////....................................................//////////////
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//////////....................................................//////////////
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//////////....................................................//////////////
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//////////....................................................//////////////
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//____________________________________________________________________________
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//
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// Members: CObjFormatsEx::IEnumFORMATETC methods
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//____________________________________________________________________________
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STDMETHODIMP
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CObjFormatsEx::Next(
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ULONG celt,
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FORMATETC *rgelt,
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ULONG *pceltFethed)
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{
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if (m_iCur == 1)
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return m_rgspEnums[1]->Next(celt, rgelt, pceltFethed);
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ULONG celtFethed1 = 0;
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HRESULT hr = m_rgspEnums[0]->Next(celt, rgelt, &celtFethed1);
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if (hr == S_OK)
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return S_OK;
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ULONG celt2 = celt - celtFethed1;
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ULONG celtFethed2 = 0;
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m_iCur = 1;
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hr = m_rgspEnums[1]->Next(celt2, &rgelt[celtFethed1], &celtFethed2);
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if (pceltFethed)
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*pceltFethed = celtFethed1 + celtFethed2;
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return hr;
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}
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STDMETHODIMP
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CObjFormatsEx::Skip(
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ULONG celt)
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{
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return E_NOTIMPL;
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}
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STDMETHODIMP
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CObjFormatsEx::Reset()
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{
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m_iCur = 0;
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m_rgspEnums[0]->Reset();
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m_rgspEnums[1]->Reset();
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return S_OK;
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}
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STDMETHODIMP
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CObjFormatsEx::Clone(
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IEnumFORMATETC ** ppenum)
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{
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return E_NOTIMPL;
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}
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HRESULT
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GetObjFormatsEx(
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IEnumFORMATETC* pEnum1,
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IEnumFORMATETC* pEnum2,
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IEnumFORMATETC** ppEnumOut)
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{
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ASSERT(pEnum1 != NULL);
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ASSERT(pEnum2 != NULL);
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ASSERT(ppEnumOut != NULL);
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if (!pEnum1 || !pEnum2 || !ppEnumOut)
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return E_INVALIDARG;
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CComObject<CObjFormatsEx>* pObj;
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CComObject<CObjFormatsEx>::CreateInstance(&pObj);
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if (pObj == NULL)
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return E_OUTOFMEMORY;
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pObj->Init(pEnum1, pEnum2);
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return pObj->QueryInterface(IID_IEnumFORMATETC,
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reinterpret_cast<void**>(ppEnumOut));
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}
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