winscp/libs/mfc/source/olevar.cpp

// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.

#include "stdafx.h"
#include <afxtempl.h>
#include <math.h>

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// helpers

void AFXAPI AfxCheckError(SCODE sc)
{
	if (FAILED(sc))
	{
		if (sc == E_OUTOFMEMORY)
			AfxThrowMemoryException();
		else
			AfxThrowOleException(sc);
	}
}

AFX_STATIC BOOL AFXAPI _AfxCompareSafeArrays(SAFEARRAY* parray1, SAFEARRAY* parray2)
{
	BOOL bCompare = FALSE;

	// If one is NULL they must both be NULL to compare
	if (parray1 == NULL || parray2 == NULL)
	{
		return parray1 == parray2;
	}

	// Dimension must match and if 0, then arrays compare
	DWORD dwDim1 = ::SafeArrayGetDim(parray1);
	DWORD dwDim2 = ::SafeArrayGetDim(parray2);
	if (dwDim1 != dwDim2)
		return FALSE;
	else if (dwDim1 == 0)
		return TRUE;

	// Element size must match
	DWORD dwSize1 = ::SafeArrayGetElemsize(parray1);
	DWORD dwSize2 = ::SafeArrayGetElemsize(parray2);
	if (dwSize1 != dwSize2)
		return FALSE;

	long* pLBound1 = NULL;
	long* pLBound2 = NULL;
	long* pUBound1 = NULL;
	long* pUBound2 = NULL;

	void* pData1 = NULL;
	void* pData2 = NULL;

	TRY
	{
		// Bounds must match
		pLBound1 = new long[dwDim1];
		pLBound2 = new long[dwDim2];
		pUBound1 = new long[dwDim1];
		pUBound2 = new long[dwDim2];

		size_t nTotalElements = 1;

		// Get and compare bounds
		for (DWORD dwIndex = 0; dwIndex < dwDim1; dwIndex++)
		{
			AfxCheckError(::SafeArrayGetLBound(
				parray1, dwIndex+1, &pLBound1[dwIndex]));
			AfxCheckError(::SafeArrayGetLBound(
				parray2, dwIndex+1, &pLBound2[dwIndex]));
			AfxCheckError(::SafeArrayGetUBound(
				parray1, dwIndex+1, &pUBound1[dwIndex]));
			AfxCheckError(::SafeArrayGetUBound(
				parray2, dwIndex+1, &pUBound2[dwIndex]));

			// Check the magnitude of each bound
			if (pUBound1[dwIndex] - pLBound1[dwIndex] !=
				pUBound2[dwIndex] - pLBound2[dwIndex])
			{
				delete[] pLBound1;
				delete[] pLBound2;
				delete[] pUBound1;
				delete[] pUBound2;

				return FALSE;
			}

			// Increment the element count
			nTotalElements *= pUBound1[dwIndex] - pLBound1[dwIndex] + 1;
		}

		// Access the data
		AfxCheckError(::SafeArrayAccessData(parray1, &pData1));
		AfxCheckError(::SafeArrayAccessData(parray2, &pData2));

		// Calculate the number of bytes of data and compare
		size_t nSize = nTotalElements * dwSize1;
		int nOffset = memcmp(pData1, pData2, nSize);
		bCompare = nOffset == 0;

		// Release the array locks
		AfxCheckError(::SafeArrayUnaccessData(parray1));
		AfxCheckError(::SafeArrayUnaccessData(parray2));
	}
	CATCH_ALL(e)
	{
		// Clean up bounds arrays
		delete[] pLBound1;
		delete[] pLBound2;
		delete[] pUBound1;
		delete[] pUBound2;

		// Release the array locks
		if (pData1 != NULL)
			AfxCheckError(::SafeArrayUnaccessData(parray1));
		if (pData2 != NULL)
			AfxCheckError(::SafeArrayUnaccessData(parray2));

		THROW_LAST();
	}
	END_CATCH_ALL

	// Clean up bounds arrays
	delete[] pLBound1;
	delete[] pLBound2;
	delete[] pUBound1;
	delete[] pUBound2;

	return bCompare;
}

AFX_STATIC void AFXAPI _AfxCreateOneDimArray(VARIANT& varSrc, DWORD dwSize)
{
	UINT nDim;

	// Clear VARIANT and re-create SafeArray if necessary
	if (varSrc.vt != (VT_UI1 | VT_ARRAY) ||
		(nDim = ::SafeArrayGetDim(varSrc.parray)) != 1)
	{
		VERIFY(::VariantClear(&varSrc) == NOERROR);
		varSrc.vt = VT_UI1 | VT_ARRAY;

		SAFEARRAYBOUND bound;
		bound.cElements = dwSize;
		bound.lLbound = 0;
		varSrc.parray = ::SafeArrayCreate(VT_UI1, 1, &bound);
		if (varSrc.parray == NULL)
			AfxThrowMemoryException();
	}
	else
	{
		// Must redimension array if necessary
		long lLower, lUpper;
		AfxCheckError(::SafeArrayGetLBound(varSrc.parray, 1, &lLower));
		AfxCheckError(::SafeArrayGetUBound(varSrc.parray, 1, &lUpper));

		// Upper bound should always be greater than lower bound
		long lSize = lUpper - lLower;
		if (lSize < 0)
		{
			ASSERT(FALSE);
			lSize = 0;

		}

		if ((DWORD)lSize != dwSize)
		{
			SAFEARRAYBOUND bound;
			bound.cElements = dwSize;
			bound.lLbound = lLower;
			AfxCheckError(::SafeArrayRedim(varSrc.parray, &bound));
		}
	}
}

AFX_STATIC void AFXAPI _AfxCopyBinaryData(SAFEARRAY* parray, const void* pvSrc, DWORD dwSize)
{
	// Access the data, copy it and unaccess it.
	void* pDest;
	AfxCheckError(::SafeArrayAccessData(parray, &pDest));
	memcpy(pDest, pvSrc, dwSize);
	AfxCheckError(::SafeArrayUnaccessData(parray));
}

/////////////////////////////////////////////////////////////////////////////
// COleVariant class

COleVariant::COleVariant(const VARIANT& varSrc)
{
	AfxVariantInit(this);
	AfxCheckError(::VariantCopy(this, (LPVARIANT)&varSrc));
}

COleVariant::COleVariant(LPCVARIANT pSrc)
{
	AfxVariantInit(this);
	AfxCheckError(::VariantCopy(this, (LPVARIANT)pSrc));
}

COleVariant::COleVariant(const COleVariant& varSrc)
{
	AfxVariantInit(this);
	AfxCheckError(::VariantCopy(this, (LPVARIANT)&varSrc));
}

COleVariant::COleVariant(LPCTSTR lpszSrc, VARTYPE vtSrc)
{
	USES_CONVERSION;
	ASSERT(vtSrc == VT_BSTR || vtSrc == VT_BSTRT);
	UNUSED(vtSrc);

	vt = VT_BSTR;
	bstrVal = NULL;

	if (lpszSrc != NULL)
	{
#ifndef _UNICODE
		if (vtSrc == VT_BSTRT)
		{
			int nLen = lstrlen(lpszSrc);
			bstrVal = ::SysAllocStringByteLen(lpszSrc, nLen);
		}
		else
#endif
		{
			bstrVal = ::SysAllocString(T2COLE(lpszSrc));
		}

		if (bstrVal == NULL)
			AfxThrowMemoryException();
	}
}



void COleVariant::SetString(LPCTSTR lpszSrc, VARTYPE vtSrc)
{
	USES_CONVERSION;
	ASSERT(vtSrc == VT_BSTR || vtSrc == VT_BSTRT);
	UNUSED(vtSrc);

	// Free up previous VARIANT
	Clear();

	vt = VT_BSTR;
	bstrVal = NULL;

	if (lpszSrc != NULL)
	{
#ifndef _UNICODE
		if (vtSrc == VT_BSTRT)
		{
			int nLen = lstrlen(lpszSrc);
			bstrVal = ::SysAllocStringByteLen(lpszSrc, nLen);
		}
		else
#endif
		{
			bstrVal = ::SysAllocString(T2COLE(lpszSrc));
		}

		if (bstrVal == NULL)
			AfxThrowMemoryException();
	}
}

COleVariant::COleVariant(short nSrc, VARTYPE vtSrc)
{
	ASSERT(vtSrc == VT_I2 || vtSrc == VT_BOOL);

	if (vtSrc == VT_BOOL)
	{
		vt = VT_BOOL;
		if (!nSrc)
			V_BOOL(this) = AFX_OLE_FALSE;
		else
			V_BOOL(this) = AFX_OLE_TRUE;
	}
	else
	{
		vt = VT_I2;
		iVal = nSrc;
	}
}

COleVariant::COleVariant(long lSrc, VARTYPE vtSrc)
{
	ASSERT(vtSrc == VT_I4 || vtSrc == VT_ERROR || vtSrc == VT_BOOL);

	if (vtSrc == VT_ERROR)
	{
		vt = VT_ERROR;
		scode = lSrc;
	}
	else if (vtSrc == VT_BOOL)
	{
		vt = VT_BOOL;
		if (!lSrc)
			V_BOOL(this) = AFX_OLE_FALSE;
		else
			V_BOOL(this) = AFX_OLE_TRUE;
	}
	else
	{
		vt = VT_I4;
		lVal = lSrc;
	}
}

// Operations
void COleVariant::_ClearCompat()
{
	Clear();
}

void COleVariant::ChangeType(VARTYPE vartype, LPVARIANT pSrc)
{
	// If pSrc is NULL, convert type in place
	if (pSrc == NULL)
		pSrc = this;
	if (pSrc != this || vartype != vt)
		AfxCheckError(::VariantChangeType(this, pSrc, 0, vartype));
}

void COleVariant::Attach(VARIANT& varSrc)
{
	// Free up previous VARIANT
	Clear();

	// give control of data to COleVariant
	memcpy(this, &varSrc, sizeof(varSrc));
	varSrc.vt = VT_EMPTY;
}

VARIANT COleVariant::Detach()
{
	VARIANT varResult = *this;
	vt = VT_EMPTY;
	return varResult;
}

// Literal comparison. Types and values must match.
BOOL COleVariant::operator==(const VARIANT& var) const
{
	if (&var == this)
		return TRUE;

	// Variants not equal if types don't match
	if (var.vt != vt)
		return FALSE;

	// Check type specific values
	switch (vt)
	{
	case VT_EMPTY:
	case VT_NULL:
		return TRUE;

	case VT_BOOL:
		return V_BOOL(&var) == V_BOOL(this);

	case VT_UI1:
		return var.bVal == bVal;

	case VT_I2:
		return var.iVal == iVal;

	case VT_I4:
		return var.lVal == lVal;

	case VT_CY:
		return (var.cyVal.Hi == cyVal.Hi && var.cyVal.Lo == cyVal.Lo);

	case VT_R4:
		return var.fltVal == fltVal;

	case VT_R8:
		return var.dblVal == dblVal;

	case VT_DATE:
		return var.date == date;

	case VT_BSTR:
		return SysStringByteLen(var.bstrVal) == SysStringByteLen(bstrVal) &&
			memcmp(var.bstrVal, bstrVal, SysStringByteLen(bstrVal)) == 0;

	case VT_ERROR:
		return var.scode == scode;

	case VT_DISPATCH:
	case VT_UNKNOWN:
		return var.punkVal == punkVal;

	default:
		if (vt & VT_ARRAY && !(vt & VT_BYREF))
			return _AfxCompareSafeArrays(var.parray, parray);
		else
			ASSERT(FALSE);  // VT_BYREF not supported
		// fall through
	}

	return FALSE;
}

const COleVariant& COleVariant::operator=(const VARIANT& varSrc)
{
	AfxCheckError(::VariantCopy(this, (LPVARIANT)&varSrc));
	return *this;
}

const COleVariant& COleVariant::operator=(LPCVARIANT pSrc)
{
	AfxCheckError(::VariantCopy(this, (LPVARIANT)pSrc));
	return *this;
}

const COleVariant& COleVariant::operator=(const COleVariant& varSrc)
{
	AfxCheckError(::VariantCopy(this, (LPVARIANT)&varSrc));
	return *this;
}

const COleVariant& COleVariant::operator=(const LPCTSTR lpszSrc)
{
	USES_CONVERSION;
	// Free up previous VARIANT
	Clear();

	vt = VT_BSTR;
	if (lpszSrc == NULL)
		bstrVal = NULL;
	else
	{
		bstrVal = ::SysAllocString(T2COLE(lpszSrc));
		if (bstrVal == NULL)
			AfxThrowMemoryException();
	}
	return *this;
}

const COleVariant& COleVariant::operator=(const CString& strSrc)
{
	USES_CONVERSION;
	// Free up previous VARIANT
	Clear();

	vt = VT_BSTR;
	bstrVal = ::SysAllocString(T2COLE(strSrc));
	if (bstrVal == NULL)
		AfxThrowMemoryException();

	return *this;
}

const COleVariant& COleVariant::operator=(BYTE nSrc)
{
	// Free up previous VARIANT if necessary
	if (vt != VT_UI1)
	{
		Clear();
		vt = VT_UI1;
	}

	bVal = nSrc;
	return *this;
}

const COleVariant& COleVariant::operator=(short nSrc)
{
	if (vt == VT_I2)
		iVal = nSrc;
	else if (vt == VT_BOOL)
	{
		if (!nSrc)
			V_BOOL(this) = AFX_OLE_FALSE;
		else
			V_BOOL(this) = AFX_OLE_TRUE;
	}
	else
	{
		// Free up previous VARIANT
		Clear();
		vt = VT_I2;
		iVal = nSrc;
	}

	return *this;
}

const COleVariant& COleVariant::operator=(long lSrc)
{
	if (vt == VT_I4)
		lVal = lSrc;
	else if (vt == VT_ERROR)
		scode = lSrc;
	else if (vt == VT_BOOL)
	{
		if (!lSrc)
			V_BOOL(this) = AFX_OLE_FALSE;
		else
			V_BOOL(this) = AFX_OLE_TRUE;
	}
	else
	{
		// Free up previous VARIANT
		Clear();
		vt = VT_I4;
		lVal = lSrc;
	}

	return *this;
}

const COleVariant& COleVariant::operator=(const COleCurrency& curSrc)
{
	// Free up previous VARIANT if necessary
	if (vt != VT_CY)
	{
		Clear();
		vt = VT_CY;
	}

	cyVal = curSrc.m_cur;
	return *this;
}

const COleVariant& COleVariant::operator=(float fltSrc)
{
	// Free up previous VARIANT if necessary
	if (vt != VT_R4)
	{
		Clear();
		vt = VT_R4;
	}

	fltVal = fltSrc;
	return *this;
}

const COleVariant& COleVariant::operator=(double dblSrc)
{
	// Free up previous VARIANT if necessary
	if (vt != VT_R8)
	{
		Clear();
		vt = VT_R8;
	}

	dblVal = dblSrc;
	return *this;
}

const COleVariant& COleVariant::operator=(const COleDateTime& dateSrc)
{
	// Free up previous VARIANT if necessary
	if (vt != VT_DATE)
	{
		Clear();
		vt = VT_DATE;
	}

	date = dateSrc.m_dt;
	return *this;
}

const COleVariant& COleVariant::operator=(const CByteArray& arrSrc)
{
	int nSize = arrSrc.GetSize();

	// Set the correct type and make sure SafeArray can hold data
	_AfxCreateOneDimArray(*this, (DWORD)nSize);

	// Copy the data into the SafeArray
	_AfxCopyBinaryData(parray, arrSrc.GetData(), (DWORD)nSize);

	return *this;
}

const COleVariant& COleVariant::operator=(const CLongBinary& lbSrc)
{
	// Set the correct type and make sure SafeArray can hold data
	_AfxCreateOneDimArray(*this, lbSrc.m_dwDataLength);

	// Copy the data into the SafeArray
	BYTE* pData = (BYTE*)::GlobalLock(lbSrc.m_hData);
	_AfxCopyBinaryData(parray, pData, lbSrc.m_dwDataLength);
	::GlobalUnlock(lbSrc.m_hData);

	return *this;
}

void AFXAPI AfxVariantInit(LPVARIANT pVar)
{
	memset(pVar, 0, sizeof(*pVar));
}

/////////////////////////////////////////////////////////////////////////////
// Diagnostics

#ifdef _DEBUG
CDumpContext& AFXAPI operator <<(CDumpContext& dc, COleVariant varSrc)
{
	LPCVARIANT pSrc = (LPCVARIANT)varSrc;

	dc << "\nCOleVariant Object:";
	dc << "\n\t vt = " << pSrc->vt;

	// No support for VT_BYREF & VT_ARRAY
	if (pSrc->vt & VT_BYREF || pSrc->vt & VT_ARRAY)
		return dc;

	switch (pSrc->vt)
	{
	case VT_BOOL:
		return dc << "\n\t VT_BOOL = " << V_BOOL(pSrc);

	case VT_UI1:
		return dc << "\n\t bVal = " << pSrc->bVal;

	case VT_I2:
		return dc << "\n\t iVal = " << pSrc->iVal;

	case VT_I4:
		return dc << "\n\t lVal = " << pSrc->lVal;

	case VT_CY:
		{
			COleVariant var(varSrc);
			var.ChangeType(VT_BSTR);
			return dc << "\n\t cyVal = " << var.bstrVal;
		}

	case VT_R4:
		return dc << "\n\t fltVal = " << pSrc->fltVal;

	case VT_R8:
		return dc << "\n\t dblVal = " << pSrc->dblVal;

	case VT_DATE:
		{
			COleVariant var(varSrc);
			var.ChangeType(VT_BSTR);
			return dc << "\n\t date = " << var.bstrVal;
		}

	case VT_BSTR:
		return dc << "\n\t bstrVal = " << pSrc->bstrVal;

	case VT_ERROR:
		return dc << "\n\t scode = " << pSrc->scode;

	case VT_DISPATCH:
	case VT_UNKNOWN:
		return dc << "\n\t punkVal = " << pSrc->punkVal;

	case VT_EMPTY:
	case VT_NULL:
		return dc;

	default:
		ASSERT(FALSE);
		return dc;
	}
}
#endif // _DEBUG

CArchive& AFXAPI operator<<(CArchive& ar, COleVariant varSrc)
{
	LPCVARIANT pSrc = (LPCVARIANT)varSrc;

	ar << pSrc->vt;

	// No support for VT_BYREF & VT_ARRAY
	if (pSrc->vt & VT_BYREF || pSrc->vt & VT_ARRAY)
		return ar;

	switch (pSrc->vt)
	{
	case VT_BOOL:
		return ar << (WORD)V_BOOL(pSrc);

	case VT_UI1:
		return ar << pSrc->bVal;

	case VT_I2:
		return ar << (WORD)pSrc->iVal;

	case VT_I4:
		return ar << pSrc->lVal;

	case VT_CY:
		ar << pSrc->cyVal.Lo;
		return ar << pSrc->cyVal.Hi;

	case VT_R4:
		return ar << pSrc->fltVal;

	case VT_R8:
		return ar << pSrc->dblVal;

	case VT_DATE:
		return ar << pSrc->date;

	case VT_BSTR:
		{
			DWORD nLen = SysStringByteLen(pSrc->bstrVal);
			ar << nLen;
			if (nLen > 0)
				ar.Write(pSrc->bstrVal, nLen * sizeof(BYTE));

			return ar;
		}

	case VT_ERROR:
		return ar << pSrc->scode;

	case VT_DISPATCH:
	case VT_UNKNOWN:
		{
			LPPERSISTSTREAM pPersistStream;
			CArchiveStream stm(&ar);

			// QI for IPersistStream or IPeristStreamInit
			SCODE sc = pSrc->punkVal->QueryInterface(
				IID_IPersistStream, (void**)&pPersistStream);
#ifndef _AFX_NO_OCC_SUPPORT
			if (FAILED(sc))
				sc = pSrc->punkVal->QueryInterface(
					IID_IPersistStreamInit, (void**)&pPersistStream);
#endif
			AfxCheckError(sc);

			TRY
			{
				// Get and archive the CLSID (GUID)
				CLSID clsid;
				AfxCheckError(pPersistStream->GetClassID(&clsid));
				ar << clsid.Data1;
				ar << clsid.Data2;
				ar << clsid.Data3;
				ar.Write(&clsid.Data4[0], sizeof clsid.Data4);

				// Always assume object is dirty
				AfxCheckError(pPersistStream->Save(&stm, TRUE));
			}
			CATCH_ALL(e)
			{
				pPersistStream->Release();
				THROW_LAST();
			}
			END_CATCH_ALL
			pPersistStream->Release();
		}
		return ar;

	case VT_EMPTY:
	case VT_NULL:
		// do nothing
		return ar;

	default:
		ASSERT(FALSE);
		return ar;
	}
}

CArchive& AFXAPI operator>>(CArchive& ar, COleVariant& varSrc)
{
	LPVARIANT pSrc = &varSrc;

	// Free up current data if necessary
	if (pSrc->vt != VT_EMPTY)
		VariantClear(pSrc);
	ar >> pSrc->vt;

	// No support for VT_BYREF & VT_ARRAY
	if (pSrc->vt & VT_BYREF || pSrc->vt & VT_ARRAY)
		return ar;

	switch (pSrc->vt)
	{
	case VT_BOOL:
		return ar >> (WORD&)V_BOOL(pSrc);

	case VT_UI1:
		return ar >> pSrc->bVal;

	case VT_I2:
		return ar >> (WORD&)pSrc->iVal;

	case VT_I4:
		return ar >> pSrc->lVal;

	case VT_CY:
		ar >> pSrc->cyVal.Lo;
		return ar >> pSrc->cyVal.Hi;

	case VT_R4:
		return ar >> pSrc->fltVal;

	case VT_R8:
		return ar >> pSrc->dblVal;

	case VT_DATE:
		return ar >> pSrc->date;

	case VT_BSTR:
		{
			DWORD nLen;
			ar >> nLen;
			if (nLen > 0)
			{
				pSrc->bstrVal = SysAllocStringByteLen(NULL, nLen);
				if (pSrc->bstrVal == NULL)
					AfxThrowMemoryException();
				ar.Read(pSrc->bstrVal, nLen * sizeof(BYTE));
			}
			else
				pSrc->bstrVal = NULL;

			return ar;
		}
		break;

	case VT_ERROR:
		return ar >> pSrc->scode;

	case VT_DISPATCH:
	case VT_UNKNOWN:
		{
			LPPERSISTSTREAM pPersistStream = NULL;
			CArchiveStream stm(&ar);

			// Retrieve the CLSID (GUID) and create an instance
			CLSID clsid;
			ar >> clsid.Data1;
			ar >> clsid.Data2;
			ar >> clsid.Data3;
			ar.Read(&clsid.Data4[0], sizeof clsid.Data4);

			// Create the object
			SCODE sc = CoCreateInstance(clsid, NULL, CLSCTX_ALL | CLSCTX_REMOTE_SERVER,
				pSrc->vt == VT_UNKNOWN ? IID_IUnknown : IID_IDispatch,
				(void**)&pSrc->punkVal);
			if (sc == E_INVALIDARG)
			{
				// may not support CLSCTX_REMOTE_SERVER, so try without
				sc = CoCreateInstance(clsid, NULL,
					CLSCTX_ALL & ~CLSCTX_REMOTE_SERVER,
					pSrc->vt == VT_UNKNOWN ? IID_IUnknown : IID_IDispatch,
					(void**)&pSrc->punkVal);
			}
			AfxCheckError(sc);

			TRY
			{
				// QI for IPersistStream or IPeristStreamInit
				sc = pSrc->punkVal->QueryInterface(
					IID_IPersistStream, (void**)&pPersistStream);
#ifndef _AFX_NO_OCC_SUPPORT
				if (FAILED(sc))
					sc = pSrc->punkVal->QueryInterface(
						IID_IPersistStreamInit, (void**)&pPersistStream);
#endif
				AfxCheckError(sc);

				// Always assumes object is dirty
				AfxCheckError(pPersistStream->Load(&stm));
			}
			CATCH_ALL(e)
			{
				// Clean up
				if (pPersistStream != NULL)
					pPersistStream->Release();

				pSrc->punkVal->Release();
				THROW_LAST();
			}
			END_CATCH_ALL

			pPersistStream->Release();
		}
		return ar;

	case VT_EMPTY:
	case VT_NULL:
		// do nothing
		return ar;

	default:
		ASSERT(FALSE);
		return ar;
	}
}

/////////////////////////////////////////////////////////////////////////////
// COleVariant Helpers

#if _MSC_VER >= 1100
template <> void AFXAPI ConstructElements<COleVariant> (COleVariant* pElements, int nCount)
#else
void AFXAPI ConstructElements(COleVariant* pElements, int nCount)
#endif
{
	ASSERT(nCount == 0 ||
		AfxIsValidAddress(pElements, nCount * sizeof(COleVariant)));

	for (; nCount--; ++pElements)
		new(pElements) COleVariant;
}

#if _MSC_VER >= 1100
template <> void AFXAPI DestructElements<COleVariant> (COleVariant* pElements, int nCount)
#else
void AFXAPI DestructElements(COleVariant* pElements, int nCount)
#endif
{
	ASSERT(nCount == 0 ||
		AfxIsValidAddress(pElements, nCount * sizeof(COleVariant)));

	for (; nCount--; ++pElements)
		pElements->~COleVariant();
}

#if _MSC_VER >= 1100
template <> void AFXAPI CopyElements<COleVariant> (COleVariant* pDest, const COleVariant* pSrc, int nCount)
#else
void AFXAPI CopyElements(COleVariant* pDest, const COleVariant* pSrc, int nCount)
#endif
{
	ASSERT(nCount == 0 ||
		AfxIsValidAddress(pDest, nCount * sizeof(COleVariant)));
	ASSERT(nCount == 0 ||
		AfxIsValidAddress(pSrc, nCount * sizeof(COleVariant)));

	for (; nCount--; ++pDest, ++pSrc)
		*pDest = *pSrc;
}

#if _MSC_VER >= 1100
template <> void AFXAPI SerializeElements<COleVariant> (CArchive& ar, COleVariant* pElements, int nCount)
#else
void AFXAPI SerializeElements(CArchive& ar, COleVariant* pElements, int nCount)
#endif
{
	ASSERT(nCount == 0 ||
		AfxIsValidAddress(pElements, nCount * sizeof(COleVariant)));

	if (ar.IsStoring())
	{
		for (; nCount--; ++pElements)
			ar << *pElements;
	}
	else
	{
		for (; nCount--; ++pElements)
			ar >> *pElements;
	}
}

#ifdef _DEBUG
#if _MSC_VER >= 1100
template <> void AFXAPI DumpElements<COleVariant> (CDumpContext& dc, const COleVariant* pElements, int nCount)
#else
void AFXAPI DumpElements(CDumpContext& dc, const COleVariant* pElements, int nCount)
#endif
{
	for (; nCount--; ++pElements)
		dc << *pElements;
}
#endif // _DEBUG

#if _MSC_VER >= 1100
template<> UINT AFXAPI HashKey<const struct tagVARIANT&> (const struct tagVARIANT& var)
#else
UINT AFXAPI HashKey(const struct tagVARIANT& var)
#endif
{
	switch (var.vt)
	{
	case VT_EMPTY:
	case VT_NULL:
		return 0;
	case VT_I2:
#if _MSC_VER >= 1100
		return HashKey<DWORD>((DWORD)var.iVal);
#else
		return HashKey((DWORD)var.iVal);
#endif
	case VT_I4:
#if _MSC_VER >= 1100
		return HashKey<DWORD>((DWORD)var.lVal);
#else
		return HashKey((DWORD)var.lVal);
#endif
	case VT_R4:
		return (UINT)(var.fltVal / 16);
	case VT_R8:
	case VT_CY:
		return (UINT)(var.dblVal / 16);
	case VT_BOOL:
#if _MSC_VER >= 1100
		return HashKey<DWORD>((DWORD)V_BOOL(&var));
#else
		return HashKey((DWORD)V_BOOL(&var));
#endif
	case VT_ERROR:
#if _MSC_VER >= 1100
		return HashKey<DWORD>((DWORD)var.scode);
#else
		return HashKey((DWORD)var.scode);
#endif
	case VT_DATE:
		return (UINT)(var.date / 16);
	case VT_BSTR:
#if _MSC_VER >= 1100
		return HashKey<LPCOLESTR>(var.bstrVal);
#else
		return HashKey((LPCOLESTR)var.bstrVal);
#endif
	case VT_DISPATCH:
	case VT_UNKNOWN:
#if _MSC_VER >= 1100
		return HashKey<DWORD>((DWORD)var.punkVal);
#else
		return HashKey((DWORD)var.punkVal);
#endif

	default:
		// No support for VT_BYREF, VT_ARRAY, VT_VARIANT, VT_DECIMAL, & VT_UI1
		ASSERT(FALSE);

		// Fall through
	}

	return 0;
}

/////////////////////////////////////////////////////////////////////////////
// COleCurrency class helpers

// Return the highest order bit composing dwTarget in wBit
#define HI_BIT(dwTarget, wBit) \
	do \
	{ \
		if (dwTarget != 0) \
			for (wBit = 32; (dwTarget & (0x00000001 << (wBit-1))) == 0; wBit--);\
		else \
			wBit = 0; \
	} while (0)

// Left shift an (assumed unsigned) currency by wBits
#define LSHIFT_UCUR(cur, wBits) \
	do \
	{ \
		for (WORD wTempBits = wBits; wTempBits > 0; wTempBits--) \
		{ \
			cur.m_cur.Hi = ((DWORD)cur.m_cur.Hi << 1); \
			cur.m_cur.Hi |= (cur.m_cur.Lo & 0x80000000) >> 31; \
			cur.m_cur.Lo = cur.m_cur.Lo << 1; \
		} \
	} while (0)

// Right shift an (assumed unsigned) currency by wBits
#define RSHIFT_UCUR(cur, wBits) \
	do \
	{ \
		for (WORD wTempBits = wBits; wTempBits > 0; wTempBits--) \
		{ \
			cur.m_cur.Lo = cur.m_cur.Lo >> 1; \
			cur.m_cur.Lo |= (cur.m_cur.Hi & 0x00000001) << 31; \
			cur.m_cur.Hi = ((DWORD)cur.m_cur.Hi >> 1); \
		} \
	} while (0)

/////////////////////////////////////////////////////////////////////////////
// COleCurrency class (internally currency is 8-byte int scaled by 10,000)

COleCurrency::COleCurrency(long nUnits, long nFractionalUnits)
{
	SetCurrency(nUnits, nFractionalUnits);
	SetStatus(valid);
}

const COleCurrency& COleCurrency::operator=(CURRENCY cySrc)
{
	m_cur = cySrc;
	SetStatus(valid);
	return *this;
}

const COleCurrency& COleCurrency::operator=(const COleCurrency& curSrc)
{
	m_cur = curSrc.m_cur;
	m_status = curSrc.m_status;
	return *this;
}

const COleCurrency& COleCurrency::operator=(const VARIANT& varSrc)
{
	if (varSrc.vt != VT_CY)
	{
		TRY
		{
			COleVariant varTemp(varSrc);
			varTemp.ChangeType(VT_CY);
			m_cur = varTemp.cyVal;
			SetStatus(valid);
		}
		// Catch COleException from ChangeType, but not CMemoryException
		CATCH(COleException, e)
		{
			// Not able to convert VARIANT to CURRENCY
			m_cur.Hi = 0;
			m_cur.Lo = 0;
			SetStatus(invalid);
			DELETE_EXCEPTION(e);
		}
		END_CATCH
	}
	else
	{
		m_cur = varSrc.cyVal;
		SetStatus(valid);
	}

	return *this;
}

BOOL COleCurrency::operator<(const COleCurrency& cur) const
{
	ASSERT(GetStatus() == valid);
	ASSERT(cur.GetStatus() == valid);

	return((m_cur.Hi == cur.m_cur.Hi) ?
		(m_cur.Lo < cur.m_cur.Lo) : (m_cur.Hi < cur.m_cur.Hi));
}

BOOL COleCurrency::operator>(const COleCurrency& cur) const
{
	ASSERT(GetStatus() == valid);
	ASSERT(cur.GetStatus() == valid);

	return((m_cur.Hi == cur.m_cur.Hi) ?
		(m_cur.Lo > cur.m_cur.Lo) : (m_cur.Hi > cur.m_cur.Hi));
}

BOOL COleCurrency::operator<=(const COleCurrency& cur) const
{
	ASSERT(GetStatus() == valid);
	ASSERT(cur.GetStatus() == valid);

	return((m_cur.Hi == cur.m_cur.Hi) ?
		(m_cur.Lo <= cur.m_cur.Lo) : (m_cur.Hi < cur.m_cur.Hi));
}

BOOL COleCurrency::operator>=(const COleCurrency& cur) const
{
	ASSERT(GetStatus() == valid);
	ASSERT(cur.GetStatus() == valid);

	return((m_cur.Hi == cur.m_cur.Hi) ?
		(m_cur.Lo >= cur.m_cur.Lo) : (m_cur.Hi > cur.m_cur.Hi));
}

COleCurrency COleCurrency::operator+(const COleCurrency& cur) const
{
	COleCurrency curResult;

	// If either operand Null, result Null
	if (GetStatus() == null || cur.GetStatus() == null)
	{
		curResult.SetStatus(null);
		return curResult;
	}

	// If either operand Invalid, result Invalid
	if (GetStatus() == invalid || cur.GetStatus() == invalid)
	{
		curResult.SetStatus(invalid);
		return curResult;
	}

	// Add separate CURRENCY components
	curResult.m_cur.Hi = m_cur.Hi + cur.m_cur.Hi;
	curResult.m_cur.Lo = m_cur.Lo + cur.m_cur.Lo;

	// Increment Hi if Lo overflows
	if (m_cur.Lo > curResult.m_cur.Lo)
		curResult.m_cur.Hi++;

	// Overflow if operands same sign and result sign different
	if (!((m_cur.Hi ^ cur.m_cur.Hi) & 0x80000000) &&
		((m_cur.Hi ^ curResult.m_cur.Hi) & 0x80000000))
	{
		curResult.SetStatus(invalid);
	}

	return curResult;
}

COleCurrency COleCurrency::operator-(const COleCurrency& cur) const
{
	COleCurrency curResult;

	// If either operand Null, result Null
	if (GetStatus() == null || cur.GetStatus() == null)
	{
		curResult.SetStatus(null);
		return curResult;
	}

	// If either operand Invalid, result Invalid
	if (GetStatus() == invalid || cur.GetStatus() == invalid)
	{
		curResult.SetStatus(invalid);
		return curResult;
	}

	// Subtract separate CURRENCY components
	curResult.m_cur.Hi = m_cur.Hi - cur.m_cur.Hi;
	curResult.m_cur.Lo = m_cur.Lo - cur.m_cur.Lo;

	// Decrement Hi if Lo overflows
	if (m_cur.Lo < curResult.m_cur.Lo)
		curResult.m_cur.Hi--;

	// Overflow if operands not same sign and result not same sign
	if (((m_cur.Hi ^ cur.m_cur.Hi) & 0x80000000) &&
		((m_cur.Hi ^ curResult.m_cur.Hi) & 0x80000000))
	{
		curResult.SetStatus(invalid);
	}

	return curResult;
}

COleCurrency COleCurrency::operator-() const
{
	// If operand not Valid, just return
	if (!GetStatus() == valid)
		return *this;

	COleCurrency curResult;

	// Negating MIN_CURRENCY,will set invalid
	if (m_cur.Hi == 0x80000000 && m_cur.Lo == 0x00000000)
	{
		curResult.SetStatus(invalid);
	}

	curResult.m_cur.Hi = ~m_cur.Hi;
	curResult.m_cur.Lo = -(long)m_cur.Lo;

	// If cy was -1 make sure Hi correctly set
	if (curResult.m_cur.Lo == 0)
		curResult.m_cur.Hi++;

	return curResult;
}

COleCurrency COleCurrency::operator*(long nOperand) const
{
	// If operand not Valid, just return
	if (!GetStatus() == valid)
		return *this;

	COleCurrency curResult(m_cur);
	DWORD nTempOp;

	// Return now if one operand is 0 (optimization)
	if ((m_cur.Hi == 0x00000000 && m_cur.Lo == 0x00000000) || nOperand == 0)
	{
		curResult.m_cur.Hi = 0;
		curResult.m_cur.Lo = 0;
		return curResult;
	}

	// Handle only valid case of multiplying MIN_CURRENCY
	if (m_cur.Hi == 0x80000000 && m_cur.Lo == 0x00000000 && nOperand == 1)
		return curResult;

	// Compute absolute values.
	if (m_cur.Hi < 0)
		curResult = -curResult;

	nTempOp = labs(nOperand);

	// Check for overflow
	if (curResult.m_cur.Hi != 0)
	{
		WORD wHiBitCur, wHiBitOp;
		HI_BIT(curResult.m_cur.Hi, wHiBitCur);
		HI_BIT(nTempOp, wHiBitOp);

		// 63-bit limit on result. (n bits)*(m bits) = (n+m-1) bits.
		if (wHiBitCur + wHiBitOp - 1 > 63)
		{
			// Overflow!
			curResult.SetStatus(invalid);

			// Set to maximum negative value
			curResult.m_cur.Hi = 0x80000000;
			curResult.m_cur.Lo = 0x00000000;

			return curResult;
		}
	}

	// Break up into WORDs
	WORD wCy4, wCy3, wCy2, wCy1, wL2, wL1;

	wCy4 = HIWORD(curResult.m_cur.Hi);
	wCy3 = LOWORD(curResult.m_cur.Hi);
	wCy2 = HIWORD(curResult.m_cur.Lo);
	wCy1 = LOWORD(curResult.m_cur.Lo);

	wL2 = HIWORD(nTempOp);
	wL1 = LOWORD(nTempOp);

	// Multiply each set of WORDs
	DWORD dwRes11, dwRes12, dwRes21, dwRes22;
	DWORD dwRes31, dwRes32, dwRes41;  // Don't need dwRes42

	dwRes11 = wCy1 * wL1;
	dwRes12 = wCy1 * wL2;
	dwRes21 = wCy2 * wL1;
	dwRes22 = wCy2 * wL2;

	dwRes31 = wCy3 * wL1;
	dwRes32 = wCy3 * wL2;
	dwRes41 = wCy4 * wL1;

	// Add up low order pieces
	dwRes11 += dwRes12<<16;
	curResult.m_cur.Lo = dwRes11 + (dwRes21<<16);
	curResult.m_cur.Hi = 0;

	// Check if carry required
	if (dwRes11 < dwRes12<<16)
		curResult.m_cur.Hi++;
	if ((DWORD)curResult.m_cur.Lo < dwRes11)
		curResult.m_cur.Hi++;

	// Add up the high order pieces
	curResult.m_cur.Hi += dwRes31 + (dwRes32<<16) + (dwRes41<<16) +
		dwRes22 + (dwRes12>>16) + (dwRes21>>16);

	// Compute result sign
	if ((m_cur.Hi ^ nOperand) & 0x80000000)
		curResult = -curResult;

	return curResult;
}

COleCurrency COleCurrency::operator/(long nOperand) const
{
	// If operand not Valid, just return
	if (!GetStatus() == valid)
		return *this;

	COleCurrency curTemp(m_cur);
	DWORD nTempOp;

	// Check for divide by 0
	if (nOperand == 0)
	{
		curTemp.SetStatus(invalid);

		// Set to maximum negative value
		curTemp.m_cur.Hi = 0x80000000;
		curTemp.m_cur.Lo = 0x00000000;

		return curTemp;
	}

	// Compute absolute values
	if (curTemp.m_cur.Hi < 0)
		curTemp = -curTemp;

	nTempOp = labs(nOperand);

	// Optimization - division is simple if Hi == 0
	if (curTemp.m_cur.Hi == 0x0000)
	{
		curTemp.m_cur.Lo = m_cur.Lo / nTempOp;

		// Compute result sign
		if ((m_cur.Hi ^ nOperand) & 0x80000000)
			curTemp = -curTemp;

		return curTemp;
	}

	// Now curTemp represents remainder
	COleCurrency curResult; // Initializes to zero
	COleCurrency curTempResult;
	COleCurrency curOperand;

	curOperand.m_cur.Lo = nTempOp;

	WORD wHiBitRem;
	WORD wScaleOp;

	// Quit if remainder can be truncated
	while (curTemp >= curOperand)
	{
		// Scale up and divide Hi portion
		HI_BIT(curTemp.m_cur.Hi, wHiBitRem);

		if (wHiBitRem != 0)
			wHiBitRem += 32;
		else
			HI_BIT(curTemp.m_cur.Lo, wHiBitRem);

		WORD wShift = (WORD)(64 - wHiBitRem);
		LSHIFT_UCUR(curTemp, wShift);

		// If Operand bigger than Hi it must be scaled
		wScaleOp = (WORD)((nTempOp > (DWORD)curTemp.m_cur.Hi) ? 1 : 0);

		// Perform synthetic division
		curTempResult.m_cur.Hi =
			(DWORD)curTemp.m_cur.Hi / (nTempOp >> wScaleOp);

		// Scale back to get correct result and remainder
		RSHIFT_UCUR(curTemp, wShift);
		wShift = (WORD)(wShift - wScaleOp);
		RSHIFT_UCUR(curTempResult, wShift);

		// Now calculate result and remainder
		curResult += curTempResult;
		curTemp -= curTempResult * nTempOp;
	}

	// Compute result sign
	if ((m_cur.Hi ^ nOperand) & 0x80000000)
		curResult = -curResult;

	return curResult;
}

void COleCurrency::SetCurrency(long nUnits, long nFractionalUnits)
{
	COleCurrency curUnits;              // Initializes to 0
	COleCurrency curFractionalUnits;    // Initializes to 0

	// Set temp currency value to Units (need to multiply by 10,000)
	curUnits.m_cur.Lo = (DWORD)labs(nUnits);
	curUnits = curUnits * 10000;
	if (nUnits < 0)
		curUnits = -curUnits;

	curFractionalUnits.m_cur.Lo = (DWORD)labs(nFractionalUnits);
	if (nFractionalUnits < 0)
		curFractionalUnits = -curFractionalUnits;

	// Now add together Units and FractionalUnits
	*this = curUnits + curFractionalUnits;

	SetStatus(valid);
}

BOOL COleCurrency::ParseCurrency(LPCTSTR lpszCurrency,
	DWORD dwFlags,  LCID lcid)
{
	USES_CONVERSION;
	CString strCurrency = lpszCurrency;

	SCODE sc;
	if ( FAILED(sc = VarCyFromStr((LPOLESTR)T2COLE(strCurrency),
		lcid, dwFlags, &m_cur)))
	{
		if (sc == DISP_E_TYPEMISMATCH)
		{
			// Can't convert string to CURRENCY, set 0 & invalid
			m_cur.Hi = 0x00000000;
			m_cur.Lo = 0x00000000;
			SetStatus(invalid);
			return FALSE;
		}
		else if (sc == DISP_E_OVERFLOW)
		{
			// Can't convert string to CURRENCY, set max neg & invalid
			m_cur.Hi = 0x80000000;
			m_cur.Lo = 0x00000000;
			SetStatus(invalid);
			return FALSE;
		}
		else
		{
			TRACE0("\nCOleCurrency VarCyFromStr call failed.\n\t");
			if (sc == E_OUTOFMEMORY)
				AfxThrowMemoryException();
			else
				AfxThrowOleException(sc);
		}
	}

	SetStatus(valid);
	return TRUE;
}

CString COleCurrency::Format(DWORD dwFlags, LCID lcid) const
{
	USES_CONVERSION;
	CString strCur;

	// If null, return empty string
	if (GetStatus() == null)
		return strCur;

	// If invalid, return Currency resource string
	if (GetStatus() == invalid)
	{
		VERIFY(strCur.LoadString(AFX_IDS_INVALID_CURRENCY));
		return strCur;
	}

	COleVariant var;
	// Don't need to trap error. Should not fail due to type mismatch
	AfxCheckError(VarBstrFromCy(m_cur, lcid, dwFlags, &V_BSTR(&var)));
	var.vt = VT_BSTR;
	return OLE2CT(V_BSTR(&var));
}


// serialization
#ifdef _DEBUG
CDumpContext& AFXAPI operator<<(CDumpContext& dc, COleCurrency curSrc)
{
	dc << "\nCOleCurrency Object:";
	dc << "\n\tm_status = " << (long)curSrc.m_status;

	COleVariant var(curSrc);
	var.ChangeType(VT_CY);
	return dc << "\n\tCurrency = " << var.bstrVal;
}
#endif // _DEBUG

CArchive& AFXAPI operator<<(CArchive& ar, COleCurrency curSrc)
{
	ar << (long)curSrc.m_status;
	ar << curSrc.m_cur.Hi;
	return ar << curSrc.m_cur.Lo;
}

CArchive& AFXAPI operator>>(CArchive& ar, COleCurrency& curSrc)
{
	ar >> (long&)curSrc.m_status;
	ar >> curSrc.m_cur.Hi;
	return ar >> curSrc.m_cur.Lo;
}


/////////////////////////////////////////////////////////////////////////////
// COleDateTime class HELPER definitions

// Verifies will fail if the needed buffer size is too large
#define MAX_TIME_BUFFER_SIZE    128         // matches that in timecore.cpp
#define MIN_DATE                (-657434L)  // about year 100
#define MAX_DATE                2958465L    // about year 9999

// Half a second, expressed in days
#define HALF_SECOND  (1.0/172800.0)

// One-based array of days in year at month start
AFX_STATIC_DATA int _afxMonthDays[13] =
	{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365};

/////////////////////////////////////////////////////////////////////////////
// COleDateTime class HELPERS - implementation

AFX_STATIC BOOL AFXAPI _AfxOleDateFromTm(WORD wYear, WORD wMonth, WORD wDay,
	WORD wHour, WORD wMinute, WORD wSecond, DATE& dtDest)
{
	// Validate year and month (ignore day of week and milliseconds)
	if (wYear > 9999 || wMonth < 1 || wMonth > 12)
		return FALSE;

	//  Check for leap year and set the number of days in the month
	BOOL bLeapYear = ((wYear & 3) == 0) &&
		((wYear % 100) != 0 || (wYear % 400) == 0);

	int nDaysInMonth =
		_afxMonthDays[wMonth] - _afxMonthDays[wMonth-1] +
		((bLeapYear && wDay == 29 && wMonth == 2) ? 1 : 0);

	// Finish validating the date
	if (wDay < 1 || wDay > nDaysInMonth ||
		wHour > 23 || wMinute > 59 ||
		wSecond > 59)
	{
		return FALSE;
	}

	// Cache the date in days and time in fractional days
	long nDate;
	double dblTime;

	//It is a valid date; make Jan 1, 1AD be 1
	nDate = wYear*365L + wYear/4 - wYear/100 + wYear/400 +
		_afxMonthDays[wMonth-1] + wDay;

	//  If leap year and it's before March, subtract 1:
	if (wMonth <= 2 && bLeapYear)
		--nDate;

	//  Offset so that 12/30/1899 is 0
	nDate -= 693959L;

	dblTime = (((long)wHour * 3600L) +  // hrs in seconds
		((long)wMinute * 60L) +  // mins in seconds
		((long)wSecond)) / 86400.;

	dtDest = (double) nDate + ((nDate >= 0) ? dblTime : -dblTime);

	return TRUE;
}

AFX_STATIC BOOL AFXAPI _AfxTmFromOleDate(DATE dtSrc, struct tm& tmDest)
{
	// The legal range does not actually span year 0 to 9999.
	if (dtSrc > MAX_DATE || dtSrc < MIN_DATE) // about year 100 to about 9999
		return FALSE;

	long nDays;             // Number of days since Dec. 30, 1899
	long nDaysAbsolute;     // Number of days since 1/1/0
	long nSecsInDay;        // Time in seconds since midnight
	long nMinutesInDay;     // Minutes in day

	long n400Years;         // Number of 400 year increments since 1/1/0
	long n400Century;       // Century within 400 year block (0,1,2 or 3)
	long n4Years;           // Number of 4 year increments since 1/1/0
	long n4Day;             // Day within 4 year block
							//  (0 is 1/1/yr1, 1460 is 12/31/yr4)
	long n4Yr;              // Year within 4 year block (0,1,2 or 3)
	BOOL bLeap4 = TRUE;     // TRUE if 4 year block includes leap year

	double dblDate = dtSrc; // tempory serial date

	// If a valid date, then this conversion should not overflow
	nDays = (long)dblDate;

	// Round to the second
	dblDate += ((dtSrc > 0.0) ? HALF_SECOND : -HALF_SECOND);

	nDaysAbsolute = (long)dblDate + 693959L; // Add days from 1/1/0 to 12/30/1899

	dblDate = fabs(dblDate);
	nSecsInDay = (long)((dblDate - floor(dblDate)) * 86400.);

	// Calculate the day of week (sun=1, mon=2...)
	//   -1 because 1/1/0 is Sat.  +1 because we want 1-based
	tmDest.tm_wday = (int)((nDaysAbsolute - 1) % 7L) + 1;

	// Leap years every 4 yrs except centuries not multiples of 400.
	n400Years = (long)(nDaysAbsolute / 146097L);

	// Set nDaysAbsolute to day within 400-year block
	nDaysAbsolute %= 146097L;

	// -1 because first century has extra day
	n400Century = (long)((nDaysAbsolute - 1) / 36524L);

	// Non-leap century
	if (n400Century != 0)
	{
		// Set nDaysAbsolute to day within century
		nDaysAbsolute = (nDaysAbsolute - 1) % 36524L;

		// +1 because 1st 4 year increment has 1460 days
		n4Years = (long)((nDaysAbsolute + 1) / 1461L);

		if (n4Years != 0)
			n4Day = (long)((nDaysAbsolute + 1) % 1461L);
		else
		{
			bLeap4 = FALSE;
			n4Day = (long)nDaysAbsolute;
		}
	}
	else
	{
		// Leap century - not special case!
		n4Years = (long)(nDaysAbsolute / 1461L);
		n4Day = (long)(nDaysAbsolute % 1461L);
	}

	if (bLeap4)
	{
		// -1 because first year has 366 days
		n4Yr = (n4Day - 1) / 365;

		if (n4Yr != 0)
			n4Day = (n4Day - 1) % 365;
	}
	else
	{
		n4Yr = n4Day / 365;
		n4Day %= 365;
	}

	// n4Day is now 0-based day of year. Save 1-based day of year, year number
	tmDest.tm_yday = (int)n4Day + 1;
	tmDest.tm_year = n400Years * 400 + n400Century * 100 + n4Years * 4 + n4Yr;

	// Handle leap year: before, on, and after Feb. 29.
	if (n4Yr == 0 && bLeap4)
	{
		// Leap Year
		if (n4Day == 59)
		{
			/* Feb. 29 */
			tmDest.tm_mon = 2;
			tmDest.tm_mday = 29;
			goto DoTime;
		}

		// Pretend it's not a leap year for month/day comp.
		if (n4Day >= 60)
			--n4Day;
	}

	// Make n4DaY a 1-based day of non-leap year and compute
	//  month/day for everything but Feb. 29.
	++n4Day;

	// Month number always >= n/32, so save some loop time */
	for (tmDest.tm_mon = (n4Day >> 5) + 1;
		n4Day > _afxMonthDays[tmDest.tm_mon]; tmDest.tm_mon++);

	tmDest.tm_mday = (int)(n4Day - _afxMonthDays[tmDest.tm_mon-1]);

DoTime:
	if (nSecsInDay == 0)
		tmDest.tm_hour = tmDest.tm_min = tmDest.tm_sec = 0;
	else
	{
		tmDest.tm_sec = (int)nSecsInDay % 60L;
		nMinutesInDay = nSecsInDay / 60L;
		tmDest.tm_min = (int)nMinutesInDay % 60;
		tmDest.tm_hour = (int)nMinutesInDay / 60;
	}

	return TRUE;
}

AFX_STATIC void AFXAPI _AfxTmConvertToStandardFormat(struct tm& tmSrc)
{
	// Convert afx internal tm to format expected by runtimes (_tcsftime, etc)
	tmSrc.tm_year -= 1900;  // year is based on 1900
	tmSrc.tm_mon -= 1;      // month of year is 0-based
	tmSrc.tm_wday -= 1;     // day of week is 0-based
	tmSrc.tm_yday -= 1;     // day of year is 0-based
}

AFX_STATIC double AFXAPI _AfxDoubleFromDate(DATE dt)
{
	// No problem if positive
	if (dt >= 0)
		return dt;

	// If negative, must convert since negative dates not continuous
	// (examples: -1.25 to -.75, -1.50 to -.50, -1.75 to -.25)
	double temp = ceil(dt);
	return temp - (dt - temp);
}

AFX_STATIC DATE AFXAPI _AfxDateFromDouble(double dbl)
{
	// No problem if positive
	if (dbl >= 0)
		return dbl;

	// If negative, must convert since negative dates not continuous
	// (examples: -.75 to -1.25, -.50 to -1.50, -.25 to -1.75)
	double temp = floor(dbl); // dbl is now whole part
	return temp + (temp - dbl);
}

/////////////////////////////////////////////////////////////////////////////
// COleDateTime class

COleDateTime PASCAL COleDateTime::GetCurrentTime()
{
	return COleDateTime(::time(NULL));
}

BOOL COleDateTime::GetAsSystemTime(SYSTEMTIME& sysTime) const
{
	BOOL bRetVal = FALSE;
	if (GetStatus() == valid)
	{
		struct tm tmTemp;
		if (_AfxTmFromOleDate(m_dt, tmTemp))
		{
			sysTime.wYear = (WORD) tmTemp.tm_year;
			sysTime.wMonth = (WORD) tmTemp.tm_mon;
			sysTime.wDayOfWeek = (WORD) (tmTemp.tm_wday - 1);
			sysTime.wDay = (WORD) tmTemp.tm_mday;
			sysTime.wHour = (WORD) tmTemp.tm_hour;
			sysTime.wMinute = (WORD) tmTemp.tm_min;
			sysTime.wSecond = (WORD) tmTemp.tm_sec;
			sysTime.wMilliseconds = 0;

			bRetVal = TRUE;
		}
	}

	return bRetVal;
}

int COleDateTime::GetYear() const
{
	struct tm tmTemp;

	if (GetStatus() == valid && _AfxTmFromOleDate(m_dt, tmTemp))
		return tmTemp.tm_year;
	else
		return AFX_OLE_DATETIME_ERROR;
}

int COleDateTime::GetMonth() const
{
	struct tm tmTemp;

	if (GetStatus() == valid && _AfxTmFromOleDate(m_dt, tmTemp))
		return tmTemp.tm_mon;
	else
		return AFX_OLE_DATETIME_ERROR;
}

int COleDateTime::GetDay() const
{
	struct tm tmTemp;

	if (GetStatus() == valid && _AfxTmFromOleDate(m_dt, tmTemp))
		return tmTemp.tm_mday;
	else
		return AFX_OLE_DATETIME_ERROR;
}

int COleDateTime::GetHour() const
{
	struct tm tmTemp;

	if (GetStatus() == valid && _AfxTmFromOleDate(m_dt, tmTemp))
		return tmTemp.tm_hour;
	else
		return AFX_OLE_DATETIME_ERROR;
}

int COleDateTime::GetMinute() const
{
	struct tm tmTemp;

	if (GetStatus() == valid && _AfxTmFromOleDate(m_dt, tmTemp))
		return tmTemp.tm_min;
	else
		return AFX_OLE_DATETIME_ERROR;
}

int COleDateTime::GetSecond() const
{
	struct tm tmTemp;

	if (GetStatus() == valid && _AfxTmFromOleDate(m_dt, tmTemp))
		return tmTemp.tm_sec;
	else
		return AFX_OLE_DATETIME_ERROR;
}

int COleDateTime::GetDayOfWeek() const
{
	struct tm tmTemp;

	if (GetStatus() == valid && _AfxTmFromOleDate(m_dt, tmTemp))
		return tmTemp.tm_wday;
	else
		return AFX_OLE_DATETIME_ERROR;
}

int COleDateTime::GetDayOfYear() const
{
	struct tm tmTemp;

	if (GetStatus() == valid && _AfxTmFromOleDate(m_dt, tmTemp))
		return tmTemp.tm_yday;
	else
		return AFX_OLE_DATETIME_ERROR;
}

const COleDateTime& COleDateTime::operator=(const VARIANT& varSrc)
{
	if (varSrc.vt != VT_DATE)
	{
		TRY
		{
			COleVariant varTemp(varSrc);
			varTemp.ChangeType(VT_DATE);
			m_dt = varTemp.date;
			SetStatus(valid);
		}
		// Catch COleException from ChangeType, but not CMemoryException
		CATCH(COleException, e)
		{
			// Not able to convert VARIANT to DATE
			DELETE_EXCEPTION(e);
			m_dt = 0;
			SetStatus(invalid);
		}
		END_CATCH
	}
	else
	{
		m_dt = varSrc.date;
		SetStatus(valid);
	}

	return *this;
}

const COleDateTime& COleDateTime::operator=(DATE dtSrc)
{
	m_dt = dtSrc;
	SetStatus(valid);

	return *this;
}

const COleDateTime& COleDateTime::operator=(const time_t& timeSrc)
{
	// Convert time_t to struct tm
	tm *ptm = localtime(&timeSrc);

	if (ptm != NULL)
	{
		m_status = _AfxOleDateFromTm((WORD)(ptm->tm_year + 1900),
			(WORD)(ptm->tm_mon + 1), (WORD)ptm->tm_mday,
			(WORD)ptm->tm_hour, (WORD)ptm->tm_min,
			(WORD)ptm->tm_sec, m_dt) ? valid : invalid;
	}
	else
	{
		// Local time must have failed (timsSrc before 1/1/70 12am)
		SetStatus(invalid);
		ASSERT(FALSE);
	}

	return *this;
}

const COleDateTime& COleDateTime::operator=(const SYSTEMTIME& systimeSrc)
{
	m_status = _AfxOleDateFromTm(systimeSrc.wYear, systimeSrc.wMonth,
		systimeSrc.wDay, systimeSrc.wHour, systimeSrc.wMinute,
		systimeSrc.wSecond, m_dt) ? valid : invalid;

	return *this;
}

const COleDateTime& COleDateTime::operator=(const FILETIME& filetimeSrc)
{
	// Assume UTC FILETIME, so convert to LOCALTIME
	FILETIME filetimeLocal;
	if (!FileTimeToLocalFileTime( &filetimeSrc, &filetimeLocal))
	{
#ifdef _DEBUG
		DWORD dwError = GetLastError();
		TRACE1("\nFileTimeToLocalFileTime failed. Error = %lu.\n\t", dwError);
#endif // _DEBUG
		m_status = invalid;
	}
	else
	{
		// Take advantage of SYSTEMTIME -> FILETIME conversion
		SYSTEMTIME systime;
		m_status = FileTimeToSystemTime(&filetimeLocal, &systime) ?
			valid : invalid;

		// At this point systime should always be valid, but...
		if (GetStatus() == valid)
		{
			m_status = _AfxOleDateFromTm(systime.wYear, systime.wMonth,
				systime.wDay, systime.wHour, systime.wMinute,
				systime.wSecond, m_dt) ? valid : invalid;
		}
	}

	return *this;
}

BOOL COleDateTime::operator<(const COleDateTime& date) const
{
	ASSERT(GetStatus() == valid);
	ASSERT(date.GetStatus() == valid);

	// Handle negative dates
	return _AfxDoubleFromDate(m_dt) < _AfxDoubleFromDate(date.m_dt);
}

BOOL COleDateTime::operator>(const COleDateTime& date) const
{   ASSERT(GetStatus() == valid);
	ASSERT(date.GetStatus() == valid);

	// Handle negative dates
	return _AfxDoubleFromDate(m_dt) > _AfxDoubleFromDate(date.m_dt);
}

BOOL COleDateTime::operator<=(const COleDateTime& date) const
{
	ASSERT(GetStatus() == valid);
	ASSERT(date.GetStatus() == valid);

	// Handle negative dates
	return _AfxDoubleFromDate(m_dt) <= _AfxDoubleFromDate(date.m_dt);
}

BOOL COleDateTime::operator>=(const COleDateTime& date) const
{
	ASSERT(GetStatus() == valid);
	ASSERT(date.GetStatus() == valid);

	// Handle negative dates
	return _AfxDoubleFromDate(m_dt) >= _AfxDoubleFromDate(date.m_dt);
}

COleDateTime COleDateTime::operator+(const COleDateTimeSpan& dateSpan) const
{
	COleDateTime dateResult;    // Initializes m_status to valid

	// If either operand NULL, result NULL
	if (GetStatus() == null || dateSpan.GetStatus() == null)
	{
		dateResult.SetStatus(null);
		return dateResult;
	}

	// If either operand invalid, result invalid
	if (GetStatus() == invalid || dateSpan.GetStatus() == invalid)
	{
		dateResult.SetStatus(invalid);
		return dateResult;
	}

	// Compute the actual date difference by adding underlying dates
	dateResult = _AfxDateFromDouble(_AfxDoubleFromDate(m_dt) + dateSpan.m_span);

	// Validate within range
	dateResult.CheckRange();

	return dateResult;
}

COleDateTime COleDateTime::operator-(const COleDateTimeSpan& dateSpan) const
{
	COleDateTime dateResult;    // Initializes m_status to valid

	// If either operand NULL, result NULL
	if (GetStatus() == null || dateSpan.GetStatus() == null)
	{
		dateResult.SetStatus(null);
		return dateResult;
	}

	// If either operand invalid, result invalid
	if (GetStatus() == invalid || dateSpan.GetStatus() == invalid)
	{
		dateResult.SetStatus(invalid);
		return dateResult;
	}

	// Compute the actual date difference by subtracting underlying dates
	dateResult = _AfxDateFromDouble(_AfxDoubleFromDate(m_dt) - dateSpan.m_span);

	// Validate within range
	dateResult.CheckRange();

	return dateResult;
}

COleDateTimeSpan COleDateTime::operator-(const COleDateTime& date) const
{
	COleDateTimeSpan spanResult;

	// If either operand NULL, result NULL
	if (GetStatus() == null || date.GetStatus() == null)
	{
		spanResult.SetStatus(COleDateTimeSpan::null);
		return spanResult;
	}

	// If either operand invalid, result invalid
	if (GetStatus() == invalid || date.GetStatus() == invalid)
	{
		spanResult.SetStatus(COleDateTimeSpan::invalid);
		return spanResult;
	}

	// Return result (span can't be invalid, so don't check range)
	return _AfxDoubleFromDate(m_dt) - _AfxDoubleFromDate(date.m_dt);
}

int COleDateTime::SetDateTime(int nYear, int nMonth, int nDay,
	int nHour, int nMin, int nSec)
{
	return m_status = _AfxOleDateFromTm((WORD)nYear, (WORD)nMonth,
		(WORD)nDay, (WORD)nHour, (WORD)nMin, (WORD)nSec, m_dt) ?
		valid : invalid;
}

BOOL COleDateTime::ParseDateTime(LPCTSTR lpszDate, DWORD dwFlags, LCID lcid)
{
	USES_CONVERSION;
	CString strDate = lpszDate;

	SCODE sc;
	if (FAILED(sc = VarDateFromStr((LPOLESTR)T2COLE(strDate), lcid,
		dwFlags, &m_dt)))
	{
		if (sc == DISP_E_TYPEMISMATCH)
		{
			// Can't convert string to date, set 0 and invalidate
			m_dt = 0;
			SetStatus(invalid);
			return FALSE;
		}
		else if (sc == DISP_E_OVERFLOW)
		{
			// Can't convert string to date, set -1 and invalidate
			m_dt = -1;
			SetStatus(invalid);
			return FALSE;
		}
		else
		{
			TRACE0("\nCOleDateTime VarDateFromStr call failed.\n\t");
			if (sc == E_OUTOFMEMORY)
				AfxThrowMemoryException();
			else
				AfxThrowOleException(sc);
		}
	}

	SetStatus(valid);
	return TRUE;
}

CString COleDateTime::Format(DWORD dwFlags, LCID lcid) const
{
	USES_CONVERSION;
	CString strDate;

	// If null, return empty string
	if (GetStatus() == null)
		return strDate;

	// If invalid, return DateTime resource string
	if (GetStatus() == invalid)
	{
		VERIFY(strDate.LoadString(AFX_IDS_INVALID_DATETIME));
		return strDate;
	}

	COleVariant var;
	// Don't need to trap error. Should not fail due to type mismatch
	AfxCheckError(VarBstrFromDate(m_dt, lcid, dwFlags, &V_BSTR(&var)));
	var.vt = VT_BSTR;
	return OLE2CT(V_BSTR(&var));
}

CString COleDateTime::Format(LPCTSTR pFormat) const
{
	CString strDate;
	struct tm tmTemp;

	// If null, return empty string
	if (GetStatus() == null)
		return strDate;

	// If invalid, return DateTime resource string
	if (GetStatus() == invalid || !_AfxTmFromOleDate(m_dt, tmTemp))
	{
		VERIFY(strDate.LoadString(AFX_IDS_INVALID_DATETIME));
		return strDate;
	}

	// Convert tm from afx internal format to standard format
	_AfxTmConvertToStandardFormat(tmTemp);

	// Fill in the buffer, disregard return value as it's not necessary
	LPTSTR lpszTemp = strDate.GetBufferSetLength(MAX_TIME_BUFFER_SIZE);
	_tcsftime(lpszTemp, strDate.GetLength(), pFormat, &tmTemp);
	strDate.ReleaseBuffer();

	return strDate;
}

CString COleDateTime::Format(UINT nFormatID) const
{
	CString strFormat;
	VERIFY(strFormat.LoadString(nFormatID) != 0);
	return Format(strFormat);
}

void COleDateTime::CheckRange()
{
	if (m_dt > MAX_DATE || m_dt < MIN_DATE) // about year 100 to about 9999
		SetStatus(invalid);
}

// serialization
#ifdef _DEBUG
CDumpContext& AFXAPI operator<<(CDumpContext& dc, COleDateTime dateSrc)
{
	dc << "\nCOleDateTime Object:";
	dc << "\n\tm_status = " << (long)dateSrc.m_status;

	COleVariant var(dateSrc);
	var.ChangeType(VT_BSTR);

	return dc << "\n\tdate = " << var.bstrVal;
}
#endif // _DEBUG

CArchive& AFXAPI operator<<(CArchive& ar, COleDateTime dateSrc)
{
	ar << (long)dateSrc.m_status;
	return ar << dateSrc.m_dt;
}

CArchive& AFXAPI operator>>(CArchive& ar, COleDateTime& dateSrc)
{
	ar >> (long&)dateSrc.m_status;
	return ar >> dateSrc.m_dt;
}

/////////////////////////////////////////////////////////////////////////////
// COleDateTimeSpan class helpers

#define MAX_DAYS_IN_SPAN    3615897L

/////////////////////////////////////////////////////////////////////////////
// COleDateTimeSpan class
long COleDateTimeSpan::GetHours() const
{
	ASSERT(GetStatus() == valid);

	double dblTemp;

	// Truncate days and scale up
	dblTemp = modf(m_span, &dblTemp);

	long lReturns = (long)((dblTemp + AFX_OLE_DATETIME_HALFSECOND) * 24);
	if (lReturns >= 24)
		lReturns -= 24;

	return lReturns;
}

long COleDateTimeSpan::GetMinutes() const
{
	ASSERT(GetStatus() == valid);

	double dblTemp;

	// Truncate hours and scale up
	dblTemp = modf(m_span * 24, &dblTemp);

	long lReturns = (long) ((dblTemp + AFX_OLE_DATETIME_HALFSECOND) * 60);
	if (lReturns >= 60)
		lReturns -= 60;

	return lReturns;
}

long COleDateTimeSpan::GetSeconds() const
{
	ASSERT(GetStatus() == valid);

	double dblTemp;

	// Truncate minutes and scale up
	dblTemp = modf(m_span * 24 * 60, &dblTemp);

	long lReturns = (long) ((dblTemp + AFX_OLE_DATETIME_HALFSECOND) * 60);
	if (lReturns >= 60)
		lReturns -= 60;

	return lReturns;
}

const COleDateTimeSpan& COleDateTimeSpan::operator=(double dblSpanSrc)
{
	m_span = dblSpanSrc;
	SetStatus(valid);
	return *this;
}

const COleDateTimeSpan& COleDateTimeSpan::operator=(const COleDateTimeSpan& dateSpanSrc)
{
	m_span = dateSpanSrc.m_span;
	m_status = dateSpanSrc.m_status;
	return *this;
}

COleDateTimeSpan COleDateTimeSpan::operator+(const COleDateTimeSpan& dateSpan) const
{
	COleDateTimeSpan dateSpanTemp;

	// If either operand Null, result Null
	if (GetStatus() == null || dateSpan.GetStatus() == null)
	{
		dateSpanTemp.SetStatus(null);
		return dateSpanTemp;
	}

	// If either operand Invalid, result Invalid
	if (GetStatus() == invalid || dateSpan.GetStatus() == invalid)
	{
		dateSpanTemp.SetStatus(invalid);
		return dateSpanTemp;
	}

	// Add spans and validate within legal range
	dateSpanTemp.m_span = m_span + dateSpan.m_span;
	dateSpanTemp.CheckRange();

	return dateSpanTemp;
}

COleDateTimeSpan COleDateTimeSpan::operator-(const COleDateTimeSpan& dateSpan) const
{
	COleDateTimeSpan dateSpanTemp;

	// If either operand Null, result Null
	if (GetStatus() == null || dateSpan.GetStatus() == null)
	{
		dateSpanTemp.SetStatus(null);
		return dateSpanTemp;
	}

	// If either operand Invalid, result Invalid
	if (GetStatus() == invalid || dateSpan.GetStatus() == invalid)
	{
		dateSpanTemp.SetStatus(invalid);
		return dateSpanTemp;
	}

	// Subtract spans and validate within legal range
	dateSpanTemp.m_span = m_span - dateSpan.m_span;
	dateSpanTemp.CheckRange();

	return dateSpanTemp;
}

void COleDateTimeSpan::SetDateTimeSpan(
	long lDays, int nHours, int nMins, int nSecs)
{
	// Set date span by breaking into fractional days (all input ranges valid)
	m_span = lDays + ((double)nHours)/24 + ((double)nMins)/(24*60) +
		((double)nSecs)/(24*60*60);

	SetStatus(valid);
}

CString COleDateTimeSpan::Format(LPCTSTR pFormat) const
{
	CString strSpan;
	struct tm tmTemp;

	// If null, return empty string
	if (GetStatus() == null)
		return strSpan;

	// If invalid, return DateTimeSpan resource string
	if (GetStatus() == invalid || !_AfxTmFromOleDate(m_span, tmTemp))
	{
		VERIFY(strSpan.LoadString(AFX_IDS_INVALID_DATETIMESPAN));
		return strSpan;
	}

	// Convert tm from afx internal format to standard format
	_AfxTmConvertToStandardFormat(tmTemp);

	// _tcsftime() doesn't handle %D, so do it here

	CString strPreParsed;
	LPCTSTR pstrSource = pFormat;
	int nTargetChar = 0;
	int nAccumulatedLength = lstrlen(pFormat);
	LPTSTR pstrTarget = strPreParsed.GetBuffer(nAccumulatedLength);

	while (*pstrSource)
	{
		if (*pstrSource == '%' && pstrSource[1] == 'D')
		{
			TCHAR szDay[12];
			_itot(GetDays(), szDay, 10);
			strPreParsed.ReleaseBuffer(nTargetChar);
			strPreParsed += szDay;
			int nTemp = lstrlen(szDay);
			nAccumulatedLength += nTemp;
			nTargetChar += nTemp;
			pstrTarget = strPreParsed.GetBuffer(nAccumulatedLength)
				+ nTargetChar;
			pstrSource = _tcsinc(pstrSource);
			pstrSource = _tcsinc(pstrSource);
		}
		*pstrTarget = *pstrSource;
		nTargetChar++;
		pstrSource = _tcsinc(pstrSource);
		pstrTarget = _tcsinc(pstrTarget);
	}
	strPreParsed.ReleaseBuffer(nTargetChar);

	// Fill in the buffer, disregard return value as it's not necessary
	LPTSTR lpszTemp = strSpan.GetBufferSetLength(MAX_TIME_BUFFER_SIZE);
	_tcsftime(lpszTemp, strSpan.GetLength(), (LPCTSTR) strPreParsed, &tmTemp);
	strSpan.ReleaseBuffer();

	return strSpan;
}

CString COleDateTimeSpan::Format(UINT nFormatID) const
{
	CString strFormat;
	VERIFY(strFormat.LoadString(nFormatID) != 0);
	return Format(strFormat);
}

void COleDateTimeSpan::CheckRange()
{
	if(m_span < -MAX_DAYS_IN_SPAN || m_span > MAX_DAYS_IN_SPAN)
		SetStatus(invalid);
}

// serialization
#ifdef _DEBUG
CDumpContext& AFXAPI operator<<(CDumpContext& dc, COleDateTimeSpan dateSpanSrc)
{
	dc << "\nCOleDateTimeSpan Object:";
	dc << "\n\tm_status = " << (long)dateSpanSrc.m_status;

	COleVariant var(dateSpanSrc.m_span);
	var.ChangeType(VT_BSTR);

	return dc << "\n\tdateSpan = " << var.bstrVal;
}
#endif // _DEBUG

CArchive& AFXAPI operator<<(CArchive& ar, COleDateTimeSpan dateSpanSrc)
{
	ar << (long)dateSpanSrc.m_status;
	return ar << dateSpanSrc.m_span;
}

CArchive& AFXAPI operator>>(CArchive& ar, COleDateTimeSpan& dateSpanSrc)
{
	ar >> (long&)dateSpanSrc.m_status;
	return ar >> dateSpanSrc.m_span;
}

/////////////////////////////////////////////////////////////////////////////
// COleSafeArray class

COleSafeArray::COleSafeArray(const SAFEARRAY& saSrc, VARTYPE vtSrc)
{
	AfxSafeArrayInit(this);
	vt = (VARTYPE)(vtSrc | VT_ARRAY);
	AfxCheckError(::SafeArrayCopy((LPSAFEARRAY)&saSrc, &parray));
	m_dwDims = GetDim();
	m_dwElementSize = GetElemSize();
}

COleSafeArray::COleSafeArray(LPCSAFEARRAY pSrc, VARTYPE vtSrc)
{
	AfxSafeArrayInit(this);
	vt = (VARTYPE)(vtSrc | VT_ARRAY);
	AfxCheckError(::SafeArrayCopy((LPSAFEARRAY)pSrc, &parray));
	m_dwDims = GetDim();
	m_dwElementSize = GetElemSize();
}

COleSafeArray::COleSafeArray(const COleSafeArray& saSrc)
{
	AfxSafeArrayInit(this);
	*this = saSrc;
	m_dwDims = GetDim();
	m_dwElementSize = GetElemSize();
}

COleSafeArray::COleSafeArray(const VARIANT& varSrc)
{
	AfxSafeArrayInit(this);
	*this = varSrc;
	m_dwDims = GetDim();
	m_dwElementSize = GetElemSize();
}

COleSafeArray::COleSafeArray(LPCVARIANT pSrc)
{
	AfxSafeArrayInit(this);
	*this = pSrc;
	m_dwDims = GetDim();
	m_dwElementSize = GetElemSize();
}

// Operations
void COleSafeArray::Attach(VARIANT& varSrc)
{
	ASSERT(varSrc.vt & VT_ARRAY);

	// Free up previous safe array if necessary
	Clear();

	// give control of data to COleSafeArray
	memcpy(this, &varSrc, sizeof(varSrc));
	varSrc.vt = VT_EMPTY;
}

VARIANT COleSafeArray::Detach()
{
	VARIANT varResult = *this;
	vt = VT_EMPTY;
	return varResult;
}

// Assignment operators
COleSafeArray& COleSafeArray::operator=(const COleSafeArray& saSrc)
{
	ASSERT(saSrc.vt & VT_ARRAY);

	AfxCheckError(::VariantCopy(this, (LPVARIANT)&saSrc));
	return *this;
}

COleSafeArray& COleSafeArray::operator=(const VARIANT& varSrc)
{
	ASSERT(varSrc.vt & VT_ARRAY);

	AfxCheckError(::VariantCopy(this, (LPVARIANT)&varSrc));
	return *this;
}

COleSafeArray& COleSafeArray::operator=(LPCVARIANT pSrc)
{
	ASSERT(pSrc->vt & VT_ARRAY);

	AfxCheckError(::VariantCopy(this, (LPVARIANT)pSrc));
	return *this;
}

COleSafeArray& COleSafeArray::operator=(const COleVariant& varSrc)
{
	ASSERT(varSrc.vt & VT_ARRAY);

	AfxCheckError(::VariantCopy(this, (LPVARIANT)&varSrc));
	return *this;
}

// Comparison operators
BOOL COleSafeArray::operator==(const SAFEARRAY& saSrc) const
{
	return _AfxCompareSafeArrays(parray, (LPSAFEARRAY)&saSrc);
}

BOOL COleSafeArray::operator==(LPCSAFEARRAY pSrc) const
{
	return _AfxCompareSafeArrays(parray, (LPSAFEARRAY)pSrc);
}

BOOL COleSafeArray::operator==(const COleSafeArray& saSrc) const
{
	if (vt != saSrc.vt)
		return FALSE;

	return _AfxCompareSafeArrays(parray, saSrc.parray);
}

BOOL COleSafeArray::operator==(const VARIANT& varSrc) const
{
	if (vt != varSrc.vt)
		return FALSE;

	return _AfxCompareSafeArrays(parray, varSrc.parray);
}

BOOL COleSafeArray::operator==(LPCVARIANT pSrc) const
{
	if (vt != pSrc->vt)
		return FALSE;

	return _AfxCompareSafeArrays(parray, pSrc->parray);
}

BOOL COleSafeArray::operator==(const COleVariant& varSrc) const
{
	if (vt != varSrc.vt)
		return FALSE;

	return _AfxCompareSafeArrays(parray, varSrc.parray);
}

#ifdef _DEBUG
void _AfxDumpSafeArrayElement(CDumpContext& dc, COleSafeArray& saSrc,
   long* piIndices)
{
   BYTE* pbData;

   pbData = (BYTE*)_alloca( saSrc.GetElemSize() );

   saSrc.GetElement(piIndices, pbData);
   switch(saSrc.vt&(~VT_ARRAY))
   {
   case VT_BOOL:
	  dc << *((VARIANT_BOOL*)pbData);
	  break;

   case VT_I1:
	  dc << *((char*)pbData);
	  break;

   case VT_I2:
	  dc << *((short*)pbData);
	  break;

   case VT_I4:
	  dc << *((long*)pbData);
	  break;

   case VT_UI1:
	  dc << *((BYTE*)pbData);
	  break;

   case VT_UI2:
	  dc << *((WORD*)pbData);
	  break;

   case VT_UI4:
	  dc << *((DWORD*)pbData);
	  break;

   case VT_R4:
	  dc << *((float*)pbData);
	  break;

   case VT_R8:
	  dc << *((double*)pbData);
	  break;

   case VT_CY:
	  {
		 COleVariant var;

		 var.vt = VT_CY;
		 var.cyVal = *((CY*)pbData);
		 var.ChangeType(VT_BSTR);
		 dc << var.bstrVal;
	  }
	  break;

   case VT_DATE:
	  {
		 COleVariant var;
		 var.vt = VT_DATE;
		 var.date = *((DATE*)pbData);
		 var.ChangeType(VT_BSTR);
		 dc << var.bstrVal;
	  }

   case VT_BSTR:
	  dc << *((BSTR*)pbData);
	  break;

   case VT_ERROR:
	  dc << *((SCODE*)pbData);
	  break;

   case VT_DISPATCH:
   case VT_UNKNOWN:
	  dc << *((IUnknown**)pbData);
	  break;

   case VT_VARIANT:
	  {
		 COleVariant var;

		 var = *((VARIANT*)pbData);
		 dc << var;
	  }
	  break;

   default:
	  ASSERT(FALSE);
	  break;
   }
}

CDumpContext& AFXAPI operator<<(CDumpContext& dc, COleSafeArray& saSrc)
{
   long iDimension;
   long nDimensions;
   long* piLBounds;
   long* piUBounds;
   long* piIndices;
   BOOL bWrapped;

   dc << "\nCOleSafeArray Object:";
   dc << "\n\tvt = " << saSrc.vt;
   dc << "\n\tbounds:";

   nDimensions = saSrc.GetDim();
   piLBounds = (long*)_alloca( nDimensions*sizeof( long ) );
   piUBounds = (long*)_alloca( nDimensions*sizeof( long ) );
   piIndices = (long*)_alloca( nDimensions*sizeof( long ) );
   // Dump the bounds
   for( iDimension = 0; iDimension < nDimensions; iDimension++ )
   {
	  saSrc.GetLBound( iDimension+1, &piLBounds[iDimension] );
	  saSrc.GetUBound( iDimension+1, &piUBounds[iDimension] );
	  dc << "\n\t(" << piLBounds[iDimension] << ", " <<
		 piUBounds[iDimension] << ")";
   }

   if( dc.GetDepth() > 0 )
   {
	  // Dump the contents of the array.
	  for( iDimension = 0; iDimension < nDimensions; iDimension++ )
	  {
		 piIndices[iDimension] = piLBounds[iDimension];
	  }

	  while( piIndices[0] <= piUBounds[0] )
	  {
		 dc << "\n\t";
		 for( iDimension = 0; iDimension < nDimensions; iDimension++ )
		 {
			dc << "[" << piIndices[iDimension] << "]";
		 }
		 dc << " = ";

		 // Dump the value of the element
		 _AfxDumpSafeArrayElement(dc, saSrc, piIndices);

		 // Increment the rightmost index, with wraparound and carry logic
		 iDimension = nDimensions-1;
		 bWrapped = TRUE;
		 do
		 {
			bWrapped = FALSE;
			piIndices[iDimension]++;
			if( piIndices[iDimension] > piUBounds[iDimension] )
			{
			   if( iDimension > 0 )
			   {
				  // We've overstepped the bounds of this dimension, so wrap
				  // around to the lower bound and make sure to increment the
				  // next dimension to the left.
				  bWrapped = TRUE;
				  piIndices[iDimension] = piLBounds[iDimension];
				  iDimension--;
			   }
			}
		 } while( bWrapped && (iDimension >= 0) );
	  }
   }

   return dc;
}
#endif // _DEBUG

void COleSafeArray::CreateOneDim(VARTYPE vtSrc, DWORD dwElements,
	const void* pvSrcData, long nLBound)
{
	ASSERT(dwElements > 0);

	// Setup the bounds and create the array
	SAFEARRAYBOUND rgsabound;
	rgsabound.cElements = dwElements;
	rgsabound.lLbound = nLBound;
	Create(vtSrc, 1, &rgsabound);

	// Copy over the data if neccessary
	if (pvSrcData != NULL)
	{
		void* pvDestData;
		AccessData(&pvDestData);
		memcpy(pvDestData, pvSrcData, GetElemSize() * dwElements);
		UnaccessData();
	}
}

DWORD COleSafeArray::GetOneDimSize()
{
	ASSERT(GetDim() == 1);

	long nUBound, nLBound;

	GetUBound(1, &nUBound);
	GetLBound(1, &nLBound);

	return nUBound + 1 - nLBound;
}

void COleSafeArray::ResizeOneDim(DWORD dwElements)
{
	ASSERT(GetDim() == 1);

	SAFEARRAYBOUND rgsabound;

	rgsabound.cElements = dwElements;
	rgsabound.lLbound = 0;

	Redim(&rgsabound);
}

void COleSafeArray::Create(VARTYPE vtSrc, DWORD dwDims, DWORD* rgElements)
{
	ASSERT(rgElements != NULL);

	// Allocate and fill proxy array of bounds (with lower bound of zero)
	SAFEARRAYBOUND* rgsaBounds = new SAFEARRAYBOUND[dwDims];

	for (DWORD dwIndex = 0; dwIndex < dwDims; dwIndex++)
	{
		// Assume lower bound is 0 and fill in element count
		rgsaBounds[dwIndex].lLbound = 0;
		rgsaBounds[dwIndex].cElements = rgElements[dwIndex];
	}

	TRY
	{
		Create(vtSrc, dwDims, rgsaBounds);
	}
	CATCH_ALL(e)
	{
		// Must free up memory
		delete[] rgsaBounds;
		THROW_LAST();
	}
	END_CATCH_ALL

	delete[] rgsaBounds;
}

void COleSafeArray::Create(VARTYPE vtSrc, DWORD dwDims, SAFEARRAYBOUND* rgsabound)
{
	ASSERT(dwDims > 0);
	ASSERT(rgsabound != NULL);

	// Validate the VARTYPE for SafeArrayCreate call
	ASSERT(!(vtSrc & VT_ARRAY));
	ASSERT(!(vtSrc & VT_BYREF));
	ASSERT(!(vtSrc & VT_VECTOR));
	ASSERT(vtSrc != VT_EMPTY);
	ASSERT(vtSrc != VT_NULL);

	// Free up old safe array if necessary
	Clear();

	parray = ::SafeArrayCreate(vtSrc, dwDims, rgsabound);

	if (parray == NULL)
		AfxThrowMemoryException();

#ifdef __BORLANDC__
	vt = (unsigned short)(vtSrc | VT_ARRAY);
#else
	vt = unsigned short(vtSrc | VT_ARRAY);
#endif //__BORLANDC__

	m_dwDims = dwDims;
	m_dwElementSize = GetElemSize();
}

void COleSafeArray::AccessData(void** ppvData)
{
	AfxCheckError(::SafeArrayAccessData(parray, ppvData));
}

void COleSafeArray::UnaccessData()
{
	AfxCheckError(::SafeArrayUnaccessData(parray));
}

void COleSafeArray::AllocData()
{
	AfxCheckError(::SafeArrayAllocData(parray));
}

void COleSafeArray::AllocDescriptor(DWORD dwDims)
{
	AfxCheckError(::SafeArrayAllocDescriptor(dwDims, &parray));
}

void COleSafeArray::Copy(LPSAFEARRAY* ppsa)
{
	AfxCheckError(::SafeArrayCopy(parray, ppsa));
}

void COleSafeArray::GetLBound(DWORD dwDim, long* pLbound)
{
	AfxCheckError(::SafeArrayGetLBound(parray, dwDim, pLbound));
}

void COleSafeArray::GetUBound(DWORD dwDim, long* pUbound)
{
	AfxCheckError(::SafeArrayGetUBound(parray, dwDim, pUbound));
}

void COleSafeArray::GetElement(long* rgIndices, void* pvData)
{
	AfxCheckError(::SafeArrayGetElement(parray, rgIndices, pvData));
}

void COleSafeArray::PtrOfIndex(long* rgIndices, void** ppvData)
{
	AfxCheckError(::SafeArrayPtrOfIndex(parray, rgIndices, ppvData));
}

void COleSafeArray::PutElement(long* rgIndices, void* pvData)
{
	AfxCheckError(::SafeArrayPutElement(parray, rgIndices, pvData));
}

void COleSafeArray::Redim(SAFEARRAYBOUND* psaboundNew)
{
	AfxCheckError(::SafeArrayRedim(parray, psaboundNew));
}

void COleSafeArray::Lock()
{
	AfxCheckError(::SafeArrayLock(parray));
}

void COleSafeArray::Unlock()
{
	AfxCheckError(::SafeArrayUnlock(parray));
}

void COleSafeArray::Destroy()
{
	AfxCheckError(::SafeArrayDestroy(parray));
}

void COleSafeArray::DestroyData()
{
	AfxCheckError(::SafeArrayDestroyData(parray));
}

void COleSafeArray::DestroyDescriptor()
{
	AfxCheckError(::SafeArrayDestroyDescriptor(parray));
}

///////////////////////////////////////////////////////////////////////////////
// COleSafeArray Helpers
void AFXAPI AfxSafeArrayInit(COleSafeArray* psa)
{
	memset(psa, 0, sizeof(*psa));
}

/////////////////////////////////////////////////////////////////////////////
// Simple field formatting to text item - see dlgdata.cpp for base types

void AFXAPI DDX_Text(CDataExchange* pDX, int nIDC, COleDateTime& value)
{
	HWND hWndCtrl = pDX->PrepareEditCtrl(nIDC);
	if (pDX->m_bSaveAndValidate)
	{
		int nLen = ::GetWindowTextLength(hWndCtrl);
		CString strTemp;

		::GetWindowText(hWndCtrl, strTemp.GetBufferSetLength(nLen), nLen+1);
		strTemp.ReleaseBuffer();

		if (!value.ParseDateTime(strTemp))  // throws exception
		{
			// Can't convert string to datetime
			AfxMessageBox(AFX_IDP_PARSE_DATETIME);
			pDX->Fail();    // throws exception
		}
	}
	else
	{
		CString strTemp = value.Format();
		AfxSetWindowText(hWndCtrl, strTemp);
	}
}

void AFXAPI DDX_Text(CDataExchange* pDX, int nIDC, COleCurrency& value)
{
	HWND hWndCtrl = pDX->PrepareEditCtrl(nIDC);
	if (pDX->m_bSaveAndValidate)
	{
		int nLen = ::GetWindowTextLength(hWndCtrl);
		CString strTemp;

		::GetWindowText(hWndCtrl, strTemp.GetBufferSetLength(nLen), nLen+1);
		strTemp.ReleaseBuffer();

		if (!value.ParseCurrency(strTemp))  // throws exception
		{
			// Can't convert string to currency
			AfxMessageBox(AFX_IDP_PARSE_CURRENCY);
			pDX->Fail();    // throws exception
		}
	}
	else
	{
		CString strTemp = value.Format();
		AfxSetWindowText(hWndCtrl, strTemp);
	}
}

/////////////////////////////////////////////////////////////////////////////