186 lines
3.2 KiB
C++
186 lines
3.2 KiB
C++
//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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//
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// Copyright (C) Microsoft Corporation, 1997 - 1999
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//
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// File: fmtetc.cpp
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//
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//--------------------------------------------------------------------------
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#include "pch.h"
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#pragma hdrstop
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#include "fmtetc.h"
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CEnumFormatEtc::CEnumFormatEtc(
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UINT cFormats,
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LPFORMATETC prgFormats
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) : m_cRef(0),
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m_cFormats(0),
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m_iCurrent(0),
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m_prgFormats(NULL),
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m_hrCtor(NOERROR)
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{
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m_hrCtor = AddFormats(cFormats, prgFormats);
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}
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CEnumFormatEtc::CEnumFormatEtc(
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const CEnumFormatEtc& ef
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) : m_cRef(0),
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m_cFormats(0),
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m_iCurrent(0),
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m_prgFormats(NULL),
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m_hrCtor(NOERROR)
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{
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m_hrCtor = AddFormats(ef.m_cFormats, ef.m_prgFormats);
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}
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CEnumFormatEtc::~CEnumFormatEtc(
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VOID
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)
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{
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delete[] m_prgFormats;
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}
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STDMETHODIMP
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CEnumFormatEtc::QueryInterface(
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REFIID riid,
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LPVOID *ppv
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)
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{
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static const QITAB qit[] = {
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QITABENT(CEnumFormatEtc, IEnumFORMATETC),
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{ 0 },
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};
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return QISearch(this, qit, riid, ppv);
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}
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STDMETHODIMP_(ULONG)
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CEnumFormatEtc::AddRef(
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VOID
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)
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{
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InterlockedIncrement(&m_cRef);
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return m_cRef;
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}
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STDMETHODIMP_(ULONG)
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CEnumFormatEtc::Release(
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VOID
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)
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{
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if (0 != InterlockedDecrement(&m_cRef))
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return m_cRef;
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delete this;
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return 0;
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}
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STDMETHODIMP
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CEnumFormatEtc::Next(
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DWORD cFormats,
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LPFORMATETC pFormats,
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LPDWORD pcReturned
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)
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{
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HRESULT hr = S_OK;
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DWORD iFormats = 0;
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if (NULL == pFormats)
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return E_INVALIDARG;
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while(cFormats-- > 0)
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{
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if (m_iCurrent < m_cFormats)
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{
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*(pFormats + iFormats++) = m_prgFormats[m_iCurrent++];
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}
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else
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{
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hr = S_FALSE;
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break;
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}
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}
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if (NULL != pcReturned)
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*pcReturned = iFormats;
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return hr;
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}
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STDMETHODIMP
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CEnumFormatEtc::Skip(
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DWORD cFormats
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)
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{
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while((cFormats-- > 0) && (m_iCurrent < m_cFormats))
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m_iCurrent++;
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return cFormats == 0 ? S_OK : S_FALSE;
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}
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STDMETHODIMP
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CEnumFormatEtc::Reset(
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VOID
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)
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{
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m_iCurrent = 0;
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return S_OK;
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}
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STDMETHODIMP
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CEnumFormatEtc::Clone(
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IEnumFORMATETC **ppvOut
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)
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{
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HRESULT hr = E_OUTOFMEMORY;
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CEnumFormatEtc *pNew = new CEnumFormatEtc(*this);
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if (NULL != pNew)
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{
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hr = pNew->QueryInterface(IID_IEnumFORMATETC, (LPVOID *)ppvOut);
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}
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return hr;
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}
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HRESULT
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CEnumFormatEtc::AddFormats(
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UINT cFormats,
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LPFORMATETC pFormats
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)
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{
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HRESULT hr = E_OUTOFMEMORY;
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LPFORMATETC pNew = new FORMATETC[m_cFormats + cFormats];
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if (NULL != pNew)
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{
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FORMATETC *pSrc = m_prgFormats;
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FORMATETC *pDest = pNew;
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int i;
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for (i = 0; i < m_cFormats; i++)
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{
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*pDest++ = *pSrc++; // Copy original formats.
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}
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pSrc = pFormats;
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for (i = 0; i < int(cFormats); i++)
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{
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*pDest++ = *pSrc++; // Add new formats.
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}
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delete[] m_prgFormats;
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m_cFormats += cFormats;
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m_prgFormats = pNew;
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hr = NOERROR;
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}
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return hr;
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}
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