334 lines
8.3 KiB
C++
334 lines
8.3 KiB
C++
//+--------------------------------------------------------------
|
|
//
|
|
// Microsoft Windows
|
|
// Copyright (C) Microsoft Corporation, 1992 - 1992.
|
|
//
|
|
// File: expiter.cxx
|
|
//
|
|
// Contents: CExposedIterator implementation
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
#include <exphead.cxx>
|
|
|
|
#include <expiter.hxx>
|
|
#include <sstream.hxx>
|
|
#include <pubiter.hxx>
|
|
|
|
//+--------------------------------------------------------------
|
|
//
|
|
// Member: CExposedIterator::CExposedIterator, public
|
|
//
|
|
// Synopsis: Constructor
|
|
//
|
|
// Arguments: [ppi] - Public iterator
|
|
// [ulOffset] - Initial offset
|
|
// [pdfb] - DocFile basis
|
|
// [ppc] - Context
|
|
// [fOwnContext] - Whether this object owns the context
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
CExposedIterator::CExposedIterator(CPubIter *ppi,
|
|
ULONG ulOffset)
|
|
{
|
|
olDebugOut((DEB_ITRACE, "In CExposedIterator::CExposedIterator("
|
|
"%p, %lu)\n", ppi, ulOffset));
|
|
_ppi = ppi;
|
|
_ulOffset = ulOffset;
|
|
_cReferences = 1;
|
|
_ulAccessLockBase = 0;
|
|
_sig = CEXPOSEDITER_SIG;
|
|
olDebugOut((DEB_ITRACE, "Out CExposedIterator::CExposedIterator\n"));
|
|
}
|
|
|
|
//+--------------------------------------------------------------
|
|
//
|
|
// Member: CExposedIterator::~CExposedIterator, public
|
|
//
|
|
// Synopsis: Destructor
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
CExposedIterator::~CExposedIterator(void)
|
|
{
|
|
olDebugOut((DEB_ITRACE, "In CExposedIterator::~CExposedIterator\n"));
|
|
_sig = CEXPOSEDITER_SIGDEL;
|
|
olAssert(_cReferences == 0);
|
|
if (_ppi)
|
|
_ppi->CPubIter::vRelease();
|
|
olDebugOut((DEB_ITRACE, "Out CExposedIterator::~CExposedIterator\n"));
|
|
}
|
|
|
|
//+--------------------------------------------------------------
|
|
//
|
|
// Member: CExposedIterator::Next, public
|
|
//
|
|
// Synopsis: Gets N entries from an iterator
|
|
//
|
|
// Arguments: [celt] - Count of elements
|
|
// [rgelt] - Array for element return
|
|
// [pceltFetched] - If non-NULL, contains the number of
|
|
// elements fetched
|
|
//
|
|
// Returns: Appropriate status code
|
|
//
|
|
// Modifies: [rgelt]
|
|
// [pceltFetched]
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
TSTDMETHODIMP CExposedIterator::Next(ULONG celt,
|
|
STATSTGW FAR *rgelt,
|
|
ULONG *pceltFetched)
|
|
{
|
|
SCODE sc;
|
|
STATSTGW *pelt = rgelt;
|
|
ULONG celtDone;
|
|
|
|
olDebugOut((DEB_ITRACE, "In CExposedIterator::Next(%lu, %p, %p)\n",
|
|
celt, rgelt, pceltFetched));
|
|
TRY
|
|
{
|
|
if (pceltFetched == NULL && celt > 1)
|
|
olErr(EH_Err, STG_E_INVALIDPARAMETER);
|
|
olAssert(0xffffUL/sizeof(STATSTGW) >= celt);
|
|
olChkTo(EH_RetSc, ValidateOutBuffer(rgelt,
|
|
(size_t)(sizeof(STATSTGW)*celt)));
|
|
memset(rgelt, 0, (size_t)(sizeof(STATSTGW)*celt));
|
|
olChk(Validate());
|
|
olChk(_ppi->CheckReverted());
|
|
for (; pelt<rgelt+celt; pelt++)
|
|
{
|
|
sc = _ppi->Next(_ulOffset, pelt);
|
|
if (sc == S_FALSE || FAILED(sc))
|
|
break;
|
|
_ulOffset++;
|
|
}
|
|
}
|
|
CATCH(CException, e)
|
|
{
|
|
sc = e.GetErrorCode();
|
|
}
|
|
END_CATCH
|
|
olDebugOut((DEB_ITRACE, "Out CExposedIterator::Next => %lX\n", sc));
|
|
EH_Err:
|
|
celtDone = pelt-rgelt;
|
|
if (FAILED(sc))
|
|
{
|
|
ULONG i;
|
|
|
|
for (i = 0; i<celtDone; i++)
|
|
delete[] rgelt[i].pwcsName;
|
|
memset(rgelt, 0, (size_t)(sizeof(STATSTGW)*celt));
|
|
}
|
|
else if (pceltFetched)
|
|
*pceltFetched = celtDone;
|
|
EH_RetSc:
|
|
return sc;
|
|
}
|
|
|
|
//+--------------------------------------------------------------
|
|
//
|
|
// Member: CExposedIterator::Skip, public
|
|
//
|
|
// Synopsis: Skips N entries from an iterator
|
|
//
|
|
// Arguments: [celt] - Count of elements
|
|
//
|
|
// Returns: Appropriate status code
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
STDMETHODIMP CExposedIterator::Skip(ULONG celt)
|
|
{
|
|
SCODE sc;
|
|
|
|
olDebugOut((DEB_ITRACE, "In CExposedIterator::Skip(%lu)\n", celt));
|
|
TRY
|
|
{
|
|
olChk(Validate());
|
|
sc = hSkip(celt);
|
|
}
|
|
CATCH(CException, e)
|
|
{
|
|
sc = e.GetErrorCode();
|
|
}
|
|
END_CATCH
|
|
olDebugOut((DEB_ITRACE, "Out CExposedIterator::Skip\n"));
|
|
EH_Err:
|
|
return ResultFromScode(sc);
|
|
}
|
|
|
|
//+--------------------------------------------------------------
|
|
//
|
|
// Member: CExposedIterator::Reset, public
|
|
//
|
|
// Synopsis: Rewinds the iterator
|
|
//
|
|
// Returns: Appropriate status code
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
STDMETHODIMP CExposedIterator::Reset(void)
|
|
{
|
|
SCODE sc;
|
|
|
|
olDebugOut((DEB_ITRACE, "In CExposedIterator::Reset()\n"));
|
|
TRY
|
|
{
|
|
olChk(Validate());
|
|
sc = hReset();
|
|
}
|
|
CATCH(CException, e)
|
|
{
|
|
sc = e.GetErrorCode();
|
|
}
|
|
END_CATCH
|
|
olDebugOut((DEB_ITRACE, "Out CExposedIterator::Reset\n"));
|
|
EH_Err:
|
|
return ResultFromScode(sc);
|
|
}
|
|
|
|
//+--------------------------------------------------------------
|
|
//
|
|
// Member: CExposedIterator::Clone, public
|
|
//
|
|
// Synopsis: Clones this iterator
|
|
//
|
|
// Arguments: [ppenm] - Clone return
|
|
//
|
|
// Returns: Appropriate status code
|
|
//
|
|
// Modifies: [ppenm]
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
STDMETHODIMP CExposedIterator::Clone(IEnumSTATSTG **ppenm)
|
|
{
|
|
SCODE sc;
|
|
CExposedIterator *piExp;
|
|
|
|
olDebugOut((DEB_ITRACE, "In CExposedIterator::Clone(%p)\n", ppenm));
|
|
TRY
|
|
{
|
|
olChk(ValidateOutPtrBuffer(ppenm));
|
|
*ppenm = NULL;
|
|
olChk(Validate());
|
|
olChk(_ppi->CheckReverted());
|
|
olMem(piExp = new CExposedIterator(_ppi, _ulOffset));
|
|
_ppi->vAddRef();
|
|
*ppenm = piExp;
|
|
}
|
|
CATCH(CException, e)
|
|
{
|
|
sc = e.GetErrorCode();
|
|
}
|
|
END_CATCH
|
|
olDebugOut((DEB_ITRACE, "Out CExposedIterator::Clone => %p\n",
|
|
*ppenm));
|
|
// Fall through
|
|
EH_Err:
|
|
return ResultFromScode(sc);
|
|
}
|
|
|
|
//+--------------------------------------------------------------
|
|
//
|
|
// Member: CExposedIterator::Release, public
|
|
//
|
|
// Synopsis: Releases resources for the iterator
|
|
//
|
|
// Returns: Appropriate status code
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
STDMETHODIMP_(ULONG) CExposedIterator::Release(void)
|
|
{
|
|
LONG lRet;
|
|
|
|
olDebugOut((DEB_ITRACE, "In CExposedIterator::Release()\n"));
|
|
TRY
|
|
{
|
|
if (FAILED(Validate()))
|
|
return 0;
|
|
if ((lRet = hRelease()) == 0)
|
|
delete this;
|
|
}
|
|
CATCH(CException, e)
|
|
{
|
|
UNREFERENCED_PARM(e);
|
|
lRet = 0;
|
|
}
|
|
END_CATCH
|
|
olDebugOut((DEB_ITRACE, "Out CExposedIterator::Release\n"));
|
|
return lRet;
|
|
}
|
|
|
|
//+--------------------------------------------------------------
|
|
//
|
|
// Member: CExposedIterator::AddRef, public
|
|
//
|
|
// Synopsis: Increments the ref count
|
|
//
|
|
// Returns: Appropriate status code
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
STDMETHODIMP_(ULONG) CExposedIterator::AddRef(void)
|
|
{
|
|
ULONG ulRet;
|
|
|
|
olDebugOut((DEB_ITRACE, "In CExposedIterator::AddRef()\n"));
|
|
TRY
|
|
{
|
|
if (FAILED(Validate()))
|
|
return 0;
|
|
ulRet = hAddRef();
|
|
}
|
|
CATCH(CException, e)
|
|
{
|
|
UNREFERENCED_PARM(e);
|
|
ulRet = 0;
|
|
}
|
|
END_CATCH
|
|
olDebugOut((DEB_ITRACE, "Out CExposedIterator::AddRef\n"));
|
|
return ulRet;
|
|
}
|
|
|
|
//+--------------------------------------------------------------
|
|
//
|
|
// Member: CExposedIterator::QueryInterface, public
|
|
//
|
|
// Synopsis: Returns an object for the requested interface
|
|
//
|
|
// Arguments: [iid] - Interface ID
|
|
// [ppvObj] - Object return
|
|
//
|
|
// Returns: Appropriate status code
|
|
//
|
|
// Modifies: [ppvObj]
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
STDMETHODIMP CExposedIterator::QueryInterface(REFIID iid, void **ppvObj)
|
|
{
|
|
SCODE sc;
|
|
|
|
olDebugOut((DEB_ITRACE, "In CExposedIterator::QueryInterface(?, %p)\n",
|
|
ppvObj));
|
|
TRY
|
|
{
|
|
olChk(Validate());
|
|
sc = hQueryInterface(iid, IID_IEnumSTATSTG, ppvObj);
|
|
}
|
|
CATCH(CException, e)
|
|
{
|
|
sc = e.GetErrorCode();
|
|
}
|
|
END_CATCH
|
|
olDebugOut((DEB_ITRACE, "Out CExposedIterator::QueryInterface => %p\n",
|
|
ppvObj));
|
|
EH_Err:
|
|
return ResultFromScode(sc);
|
|
}
|