120 lines
2.1 KiB
C++
120 lines
2.1 KiB
C++
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1995 - 1995.
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// File: dutil.cxx
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// Contents: Utility functions and macros for data objects
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// History: 14-Dec-95 BruceFo Created
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#include "headers.hxx"
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#pragma hdrstop
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#include "dutil.hxx"
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LPIDA
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DataObj_GetHIDA(
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LPDATAOBJECT pdtobj,
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STGMEDIUM* pmedium
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)
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{
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FORMATETC fmte = {g_cfHIDA, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
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if (NULL != pmedium)
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{
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pmedium->pUnkForRelease = NULL;
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pmedium->hGlobal = NULL;
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}
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if (NULL == pmedium)
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{
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if (SUCCEEDED(pdtobj->QueryGetData(&fmte)))
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{
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return (LPIDA)TRUE;
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}
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else
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{
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return (LPIDA)FALSE;
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}
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}
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else if (SUCCEEDED(pdtobj->GetData(&fmte, pmedium)))
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{
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return (LPIDA)GlobalLock(pmedium->hGlobal);
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}
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return NULL;
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}
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VOID
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HIDA_ReleaseStgMedium(
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LPIDA pida,
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STGMEDIUM* pmedium
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)
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{
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if ((NULL != pmedium->hGlobal) && (pmedium->tymed==TYMED_HGLOBAL))
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{
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#if DBG == 1
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if (NULL != pida)
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{
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LPIDA pidaT = (LPIDA)GlobalLock(pmedium->hGlobal);
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appAssert(pidaT == pida);
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GlobalUnlock(pmedium->hGlobal);
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}
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#endif
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GlobalUnlock(pmedium->hGlobal);
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}
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else
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{
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appAssert(FALSE);
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}
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ReleaseStgMedium(pmedium);
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}
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LPITEMIDLIST*
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ILA_Clone(
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UINT cidl,
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LPCITEMIDLIST* apidl
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)
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{
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LPITEMIDLIST* aNewPidl = new LPITEMIDLIST[cidl];
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if (NULL == aNewPidl)
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{
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return NULL;
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}
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for (UINT i = 0; i < cidl; i++)
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{
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aNewPidl[i] = ILClone(apidl[i]);
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if (NULL == aNewPidl[i])
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{
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// delete what we've allocated so far
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for (UINT j = 0; j < i; j++)
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{
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ILFree(aNewPidl[i]);
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}
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delete[] aNewPidl;
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return NULL;
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}
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}
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return aNewPidl;
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}
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VOID
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ILA_Free(
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UINT cidl,
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LPITEMIDLIST* apidl
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)
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{
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for (UINT i = 0; i < cidl; i++)
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{
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ILFree(apidl[i]);
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}
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delete[] apidl;
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}
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