1028 lines
26 KiB
C++
1028 lines
26 KiB
C++
//
|
|
// comutil.h - Native C++ compiler COM support - BSTR, VARIANT wrappers header
|
|
//
|
|
|
|
#pragma once
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
class _bstr_t;
|
|
class auto_var;
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Wrapper class for VARIANT
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
/*
|
|
* VARENUM usage key,
|
|
*
|
|
* * [V] - may appear in a VARIANT
|
|
* * [T] - may appear in a TYPEDESC
|
|
* * [P] - may appear in an OLE property set
|
|
* * [S] - may appear in a Safe Array
|
|
* * [C] - supported by class auto_var
|
|
*
|
|
*
|
|
* VT_EMPTY [V] [P] nothing
|
|
* VT_NULL [V] [P] SQL style Null
|
|
* VT_I2 [V][T][P][S][C] 2 byte signed int
|
|
* VT_I4 [V][T][P][S][C] 4 byte signed int
|
|
* VT_R4 [V][T][P][S][C] 4 byte real
|
|
* VT_R8 [V][T][P][S][C] 8 byte real
|
|
* VT_CY [V][T][P][S][C] currency
|
|
* VT_DATE [V][T][P][S][C] date
|
|
* VT_BSTR [V][T][P][S][C] OLE Automation string
|
|
* VT_DISPATCH [V][T][P][S][C] IDispatch *
|
|
* VT_ERROR [V][T] [S][C] SCODE
|
|
* VT_BOOL [V][T][P][S][C] True=-1, False=0
|
|
* VT_VARIANT [V][T][P][S] VARIANT *
|
|
* VT_UNKNOWN [V][T] [S][C] IUnknown *
|
|
* VT_DECIMAL [V][T] [S][C] 16 byte fixed point
|
|
* VT_I1 [T] signed char
|
|
* VT_UI1 [V][T][P][S][C] unsigned char
|
|
* VT_UI2 [T][P] unsigned short
|
|
* VT_UI4 [T][P] unsigned short
|
|
* VT_I8 [T][P] signed 64-bit int
|
|
* VT_UI8 [T][P] unsigned 64-bit int
|
|
* VT_INT [T] signed machine int
|
|
* VT_UINT [T] unsigned machine int
|
|
* VT_VOID [T] C style void
|
|
* VT_HRESULT [T] Standard return type
|
|
* VT_PTR [T] pointer type
|
|
* VT_SAFEARRAY [T] (use VT_ARRAY in VARIANT)
|
|
* VT_CARRAY [T] C style array
|
|
* VT_USERDEFINED [T] user defined type
|
|
* VT_LPSTR [T][P] null terminated string
|
|
* VT_LPWSTR [T][P] wide null terminated string
|
|
* VT_FILETIME [P] FILETIME
|
|
* VT_BLOB [P] Length prefixed bytes
|
|
* VT_STREAM [P] Name of the stream follows
|
|
* VT_STORAGE [P] Name of the storage follows
|
|
* VT_STREAMED_OBJECT [P] Stream contains an object
|
|
* VT_STORED_OBJECT [P] Storage contains an object
|
|
* VT_BLOB_OBJECT [P] Blob contains an object
|
|
* VT_CF [P] Clipboard format
|
|
* VT_CLSID [P] A Class ID
|
|
* VT_VECTOR [P] simple counted array
|
|
* VT_ARRAY [V] SAFEARRAY*
|
|
* VT_BYREF [V] void* for local use
|
|
*/
|
|
|
|
class auto_var : public ::tagVARIANT {
|
|
public:
|
|
// Constructors
|
|
//
|
|
auto_var() throw();
|
|
|
|
auto_var(const VARIANT& varSrc) throw(_com_error);
|
|
auto_var(const VARIANT* pSrc) throw(_com_error);
|
|
auto_var(const auto_var& varSrc) throw(_com_error);
|
|
|
|
auto_var(VARIANT& varSrc, bool fCopy) throw(_com_error); // Attach VARIANT if !fCopy
|
|
|
|
auto_var(short sSrc, VARTYPE vtSrc = VT_I2) throw(_com_error); // Creates a VT_I2, or a VT_BOOL
|
|
auto_var(long lSrc, VARTYPE vtSrc = VT_I4) throw(_com_error); // Creates a VT_I4, a VT_ERROR, or a VT_BOOL
|
|
auto_var(float fltSrc) throw(); // Creates a VT_R4
|
|
auto_var(double dblSrc, VARTYPE vtSrc = VT_R8) throw(_com_error); // Creates a VT_R8, or a VT_DATE
|
|
auto_var(const CY& cySrc) throw(); // Creates a VT_CY
|
|
auto_var(const _bstr_t& bstrSrc) throw(_com_error); // Creates a VT_BSTR
|
|
auto_var(const wchar_t *pSrc) throw(_com_error); // Creates a VT_BSTR
|
|
auto_var(const char* pSrc) throw(_com_error); // Creates a VT_BSTR
|
|
auto_var(IDispatch* pSrc, bool fAddRef = true) throw(); // Creates a VT_DISPATCH
|
|
auto_var(bool bSrc) throw(); // Creates a VT_BOOL
|
|
auto_var(IUnknown* pSrc, bool fAddRef = true) throw(); // Creates a VT_UNKNOWN
|
|
auto_var(const DECIMAL& decSrc) throw(); // Creates a VT_DECIMAL
|
|
auto_var(BYTE bSrc) throw(); // Creates a VT_UI1
|
|
|
|
// Destructor
|
|
//
|
|
~auto_var() throw(_com_error);
|
|
|
|
// Extractors
|
|
//
|
|
operator short() const throw(_com_error); // Extracts a short from a VT_I2
|
|
operator long() const throw(_com_error); // Extracts a long from a VT_I4
|
|
operator float() const throw(_com_error); // Extracts a float from a VT_R4
|
|
operator double() const throw(_com_error); // Extracts a double from a VT_R8
|
|
operator CY() const throw(_com_error); // Extracts a CY from a VT_CY
|
|
operator _bstr_t() const throw(_com_error); // Extracts a _bstr_t from a VT_BSTR
|
|
operator IDispatch*() const throw(_com_error); // Extracts a IDispatch* from a VT_DISPATCH
|
|
operator bool() const throw(_com_error); // Extracts a bool from a VT_BOOL
|
|
operator IUnknown*() const throw(_com_error); // Extracts a IUnknown* from a VT_UNKNOWN
|
|
operator DECIMAL() const throw(_com_error); // Extracts a DECIMAL from a VT_DECIMAL
|
|
operator BYTE() const throw(_com_error); // Extracts a BTYE (unsigned char) from a VT_UI1
|
|
|
|
// Assignment operations
|
|
//
|
|
auto_var& operator=(const VARIANT& varSrc) throw(_com_error);
|
|
auto_var& operator=(const VARIANT* pSrc) throw(_com_error);
|
|
auto_var& operator=(const auto_var& varSrc) throw(_com_error);
|
|
|
|
auto_var& operator=(short sSrc) throw(_com_error); // Assign a VT_I2, or a VT_BOOL
|
|
auto_var& operator=(long lSrc) throw(_com_error); // Assign a VT_I4, a VT_ERROR or a VT_BOOL
|
|
auto_var& operator=(float fltSrc) throw(_com_error); // Assign a VT_R4
|
|
auto_var& operator=(double dblSrc) throw(_com_error); // Assign a VT_R8, or a VT_DATE
|
|
auto_var& operator=(const CY& cySrc) throw(_com_error); // Assign a VT_CY
|
|
auto_var& operator=(const _bstr_t& bstrSrc) throw(_com_error); // Assign a VT_BSTR
|
|
auto_var& operator=(const wchar_t* pSrc) throw(_com_error); // Assign a VT_BSTR
|
|
auto_var& operator=(const char* pSrc) throw(_com_error); // Assign a VT_BSTR
|
|
auto_var& operator=(IDispatch* pSrc) throw(_com_error); // Assign a VT_DISPATCH
|
|
auto_var& operator=(bool bSrc) throw(_com_error); // Assign a VT_BOOL
|
|
auto_var& operator=(IUnknown* pSrc) throw(_com_error); // Assign a VT_UNKNOWN
|
|
auto_var& operator=(const DECIMAL& decSrc) throw(_com_error); // Assign a VT_DECIMAL
|
|
auto_var& operator=(BYTE bSrc) throw(_com_error); // Assign a VT_UI1
|
|
|
|
// Comparison operations
|
|
//
|
|
bool operator==(const VARIANT& varSrc) const throw(_com_error);
|
|
bool operator==(const VARIANT* pSrc) const throw(_com_error);
|
|
|
|
bool operator!=(const VARIANT& varSrc) const throw(_com_error);
|
|
bool operator!=(const VARIANT* pSrc) const throw(_com_error);
|
|
|
|
// Low-level operations
|
|
//
|
|
void Clear() throw(_com_error);
|
|
|
|
void Attach(VARIANT& varSrc) throw(_com_error);
|
|
VARIANT Detach() throw(_com_error);
|
|
|
|
void ChangeType(VARTYPE vartype, const auto_var* pSrc = NULL) throw(_com_error);
|
|
|
|
void SetString(const char* pSrc) throw(_com_error); // used to set ANSI string
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Constructors
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Default constructor
|
|
//
|
|
inline auto_var::auto_var() throw()
|
|
{
|
|
::VariantInit(this);
|
|
}
|
|
|
|
// Construct a auto_var from a const VARIANT&
|
|
//
|
|
inline auto_var::auto_var(const VARIANT& varSrc) throw(_com_error)
|
|
{
|
|
::VariantInit(this);
|
|
_com_util::CheckError(::VariantCopy(this, const_cast<VARIANT*>(&varSrc)));
|
|
}
|
|
|
|
// Construct a auto_var from a const VARIANT*
|
|
//
|
|
inline auto_var::auto_var(const VARIANT* pSrc) throw(_com_error)
|
|
{
|
|
::VariantInit(this);
|
|
_com_util::CheckError(::VariantCopy(this, const_cast<VARIANT*>(pSrc)));
|
|
}
|
|
|
|
// Construct a auto_var from a const auto_var&
|
|
//
|
|
inline auto_var::auto_var(const auto_var& varSrc) throw(_com_error)
|
|
{
|
|
::VariantInit(this);
|
|
_com_util::CheckError(::VariantCopy(this, const_cast<VARIANT*>(static_cast<const VARIANT*>(&varSrc))));
|
|
}
|
|
|
|
// Construct a auto_var from a VARIANT&. If fCopy is FALSE, give control of
|
|
// data to the auto_var without doing a VariantCopy.
|
|
//
|
|
inline auto_var::auto_var(VARIANT& varSrc, bool fCopy) throw(_com_error)
|
|
{
|
|
if (fCopy) {
|
|
::VariantInit(this);
|
|
_com_util::CheckError(::VariantCopy(this, &varSrc));
|
|
} else {
|
|
memcpy(this, &varSrc, sizeof(varSrc));
|
|
V_VT(&varSrc) = VT_EMPTY;
|
|
}
|
|
}
|
|
|
|
// Construct either a VT_I2 VARIANT or a VT_BOOL VARIANT from
|
|
// a short (the default is VT_I2)
|
|
//
|
|
inline auto_var::auto_var(short sSrc, VARTYPE vtSrc) throw(_com_error)
|
|
{
|
|
if ((vtSrc != VT_I2) && (vtSrc != VT_BOOL)) {
|
|
_com_issue_error(E_INVALIDARG);
|
|
}
|
|
|
|
if (vtSrc == VT_BOOL) {
|
|
V_VT(this) = VT_BOOL;
|
|
V_BOOL(this) = (sSrc ? VARIANT_TRUE : VARIANT_FALSE);
|
|
}
|
|
else {
|
|
V_VT(this) = VT_I2;
|
|
V_I2(this) = sSrc;
|
|
}
|
|
}
|
|
|
|
// Construct either a VT_I4 VARIANT, a VT_BOOL VARIANT, or a
|
|
// VT_ERROR VARIANT from a long (the default is VT_I4)
|
|
//
|
|
inline auto_var::auto_var(long lSrc, VARTYPE vtSrc) throw(_com_error)
|
|
{
|
|
if ((vtSrc != VT_I4) && (vtSrc != VT_ERROR) && (vtSrc != VT_BOOL)) {
|
|
_com_issue_error(E_INVALIDARG);
|
|
}
|
|
|
|
if (vtSrc == VT_ERROR) {
|
|
V_VT(this) = VT_ERROR;
|
|
V_ERROR(this) = lSrc;
|
|
}
|
|
else if (vtSrc == VT_BOOL) {
|
|
V_VT(this) = VT_BOOL;
|
|
V_BOOL(this) = (lSrc ? VARIANT_TRUE : VARIANT_FALSE);
|
|
}
|
|
else {
|
|
V_VT(this) = VT_I4;
|
|
V_I4(this) = lSrc;
|
|
}
|
|
}
|
|
|
|
// Construct a VT_R4 VARIANT from a float
|
|
//
|
|
inline auto_var::auto_var(float fltSrc) throw()
|
|
{
|
|
V_VT(this) = VT_R4;
|
|
V_R4(this) = fltSrc;
|
|
}
|
|
|
|
// Construct either a VT_R8 VARIANT, or a VT_DATE VARIANT from
|
|
// a double (the default is VT_R8)
|
|
//
|
|
inline auto_var::auto_var(double dblSrc, VARTYPE vtSrc) throw(_com_error)
|
|
{
|
|
if ((vtSrc != VT_R8) && (vtSrc != VT_DATE)) {
|
|
_com_issue_error(E_INVALIDARG);
|
|
}
|
|
|
|
if (vtSrc == VT_DATE) {
|
|
V_VT(this) = VT_DATE;
|
|
V_DATE(this) = dblSrc;
|
|
}
|
|
else {
|
|
V_VT(this) = VT_R8;
|
|
V_R8(this) = dblSrc;
|
|
}
|
|
}
|
|
|
|
// Construct a VT_CY from a CY
|
|
//
|
|
inline auto_var::auto_var(const CY& cySrc) throw()
|
|
{
|
|
V_VT(this) = VT_CY;
|
|
V_CY(this) = cySrc;
|
|
}
|
|
|
|
// Construct a VT_BSTR VARIANT from a const _bstr_t&
|
|
//
|
|
inline auto_var::auto_var(const _bstr_t& bstrSrc) throw(_com_error)
|
|
{
|
|
V_VT(this) = VT_BSTR;
|
|
|
|
BSTR bstr = static_cast<wchar_t*>(bstrSrc);
|
|
V_BSTR(this) = ::SysAllocStringByteLen(reinterpret_cast<char*>(bstr),
|
|
::SysStringByteLen(bstr));
|
|
|
|
if (V_BSTR(this) == NULL) {
|
|
_com_issue_error(E_OUTOFMEMORY);
|
|
}
|
|
}
|
|
|
|
// Construct a VT_BSTR VARIANT from a const wchar_t*
|
|
//
|
|
inline auto_var::auto_var(const wchar_t* pSrc) throw(_com_error)
|
|
{
|
|
V_VT(this) = VT_BSTR;
|
|
V_BSTR(this) = ::SysAllocString(pSrc);
|
|
|
|
if (V_BSTR(this) == NULL && pSrc != NULL) {
|
|
_com_issue_error(E_OUTOFMEMORY);
|
|
}
|
|
}
|
|
|
|
// Construct a VT_BSTR VARIANT from a const char*
|
|
//
|
|
inline auto_var::auto_var(const char* pSrc) throw(_com_error)
|
|
{
|
|
V_VT(this) = VT_BSTR;
|
|
V_BSTR(this) = _com_util::ConvertStringToBSTR(pSrc);
|
|
|
|
if (V_BSTR(this) == NULL && pSrc != NULL) {
|
|
_com_issue_error(E_OUTOFMEMORY);
|
|
}
|
|
}
|
|
|
|
// Construct a VT_DISPATCH VARIANT from an IDispatch*
|
|
//
|
|
inline auto_var::auto_var(IDispatch* pSrc, bool fAddRef) throw()
|
|
{
|
|
V_VT(this) = VT_DISPATCH;
|
|
V_DISPATCH(this) = pSrc;
|
|
|
|
// Need the AddRef() as VariantClear() calls Release(), unless fAddRef
|
|
// false indicates we're taking ownership
|
|
//
|
|
if (fAddRef) {
|
|
V_DISPATCH(this)->AddRef();
|
|
}
|
|
}
|
|
|
|
// Construct a VT_BOOL VARIANT from a bool
|
|
//
|
|
inline auto_var::auto_var(bool bSrc) throw()
|
|
{
|
|
V_VT(this) = VT_BOOL;
|
|
V_BOOL(this) = (bSrc ? VARIANT_TRUE : VARIANT_FALSE);
|
|
}
|
|
|
|
// Construct a VT_UNKNOWN VARIANT from an IUnknown*
|
|
//
|
|
inline auto_var::auto_var(IUnknown* pSrc, bool fAddRef) throw()
|
|
{
|
|
V_VT(this) = VT_UNKNOWN;
|
|
V_UNKNOWN(this) = pSrc;
|
|
|
|
// Need the AddRef() as VariantClear() calls Release(), unless fAddRef
|
|
// false indicates we're taking ownership
|
|
//
|
|
if (fAddRef) {
|
|
V_UNKNOWN(this)->AddRef();
|
|
}
|
|
}
|
|
|
|
// Construct a VT_DECIMAL VARIANT from a DECIMAL
|
|
//
|
|
inline auto_var::auto_var(const DECIMAL& decSrc) throw()
|
|
{
|
|
// Order is important here! Setting V_DECIMAL wipes out the entire VARIANT
|
|
//
|
|
V_DECIMAL(this) = decSrc;
|
|
V_VT(this) = VT_DECIMAL;
|
|
}
|
|
|
|
// Construct a VT_UI1 VARIANT from a BYTE (unsigned char)
|
|
//
|
|
inline auto_var::auto_var(BYTE bSrc) throw()
|
|
{
|
|
V_VT(this) = VT_UI1;
|
|
V_UI1(this) = bSrc;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Extractors
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Extracts a VT_I2 into a short
|
|
//
|
|
inline auto_var::operator short() const throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_I2) {
|
|
return V_I2(this);
|
|
}
|
|
|
|
auto_var varDest;
|
|
|
|
varDest.ChangeType(VT_I2, this);
|
|
|
|
return V_I2(&varDest);
|
|
}
|
|
|
|
// Extracts a VT_I4 into a long
|
|
//
|
|
inline auto_var::operator long() const throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_I4) {
|
|
return V_I4(this);
|
|
}
|
|
|
|
auto_var varDest;
|
|
|
|
varDest.ChangeType(VT_I4, this);
|
|
|
|
return V_I4(&varDest);
|
|
}
|
|
|
|
// Extracts a VT_R4 into a float
|
|
//
|
|
inline auto_var::operator float() const throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_R4) {
|
|
return V_R4(this);
|
|
}
|
|
|
|
auto_var varDest;
|
|
|
|
varDest.ChangeType(VT_R4, this);
|
|
|
|
return V_R4(&varDest);
|
|
}
|
|
|
|
// Extracts a VT_R8 into a double
|
|
//
|
|
inline auto_var::operator double() const throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_R8) {
|
|
return V_R8(this);
|
|
}
|
|
|
|
auto_var varDest;
|
|
|
|
varDest.ChangeType(VT_R8, this);
|
|
|
|
return V_R8(&varDest);
|
|
}
|
|
|
|
// Extracts a VT_CY into a CY
|
|
//
|
|
inline auto_var::operator CY() const throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_CY) {
|
|
return V_CY(this);
|
|
}
|
|
|
|
auto_var varDest;
|
|
|
|
varDest.ChangeType(VT_CY, this);
|
|
|
|
return V_CY(&varDest);
|
|
}
|
|
|
|
// Extracts a VT_BSTR into a _bstr_t
|
|
//
|
|
inline auto_var::operator _bstr_t() const throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_BSTR) {
|
|
return V_BSTR(this);
|
|
}
|
|
|
|
auto_var varDest;
|
|
|
|
varDest.ChangeType(VT_BSTR, this);
|
|
|
|
return V_BSTR(&varDest);
|
|
}
|
|
|
|
// Extracts a VT_DISPATCH into an IDispatch*
|
|
//
|
|
inline auto_var::operator IDispatch*() const throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_DISPATCH) {
|
|
V_DISPATCH(this)->AddRef();
|
|
return V_DISPATCH(this);
|
|
}
|
|
|
|
auto_var varDest;
|
|
|
|
varDest.ChangeType(VT_DISPATCH, this);
|
|
|
|
V_DISPATCH(&varDest)->AddRef();
|
|
return V_DISPATCH(&varDest);
|
|
}
|
|
|
|
// Extract a VT_BOOL into a bool
|
|
//
|
|
inline auto_var::operator bool() const throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_BOOL) {
|
|
return V_BOOL(this) ? true : false;
|
|
}
|
|
|
|
auto_var varDest;
|
|
|
|
varDest.ChangeType(VT_BOOL, this);
|
|
|
|
return V_BOOL(&varDest) ? true : false;
|
|
}
|
|
|
|
// Extracts a VT_UNKNOWN into an IUnknown*
|
|
//
|
|
inline auto_var::operator IUnknown*() const throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_UNKNOWN) {
|
|
return V_UNKNOWN(this);
|
|
}
|
|
|
|
auto_var varDest;
|
|
|
|
varDest.ChangeType(VT_UNKNOWN, this);
|
|
|
|
return V_UNKNOWN(&varDest);
|
|
}
|
|
|
|
// Extracts a VT_DECIMAL into a DECIMAL
|
|
//
|
|
inline auto_var::operator DECIMAL() const throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_DECIMAL) {
|
|
return V_DECIMAL(this);
|
|
}
|
|
|
|
auto_var varDest;
|
|
|
|
varDest.ChangeType(VT_DECIMAL, this);
|
|
|
|
return V_DECIMAL(&varDest);
|
|
}
|
|
|
|
// Extracts a VT_UI1 into a BYTE (unsigned char)
|
|
//
|
|
inline auto_var::operator BYTE() const throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_UI1) {
|
|
return V_UI1(this);
|
|
}
|
|
|
|
auto_var varDest;
|
|
|
|
varDest.ChangeType(VT_UI1, this);
|
|
|
|
return V_UI1(&varDest);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Assignment operations
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Assign a const VARIANT& (::VariantCopy handles everything)
|
|
//
|
|
inline auto_var& auto_var::operator=(const VARIANT& varSrc) throw(_com_error)
|
|
{
|
|
Clear();
|
|
_com_util::CheckError(::VariantCopy(this, const_cast<VARIANT*>(&varSrc)));
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign a const VARIANT* (::VariantCopy handles everything)
|
|
//
|
|
inline auto_var& auto_var::operator=(const VARIANT* pSrc) throw(_com_error)
|
|
{
|
|
Clear();
|
|
_com_util::CheckError(::VariantCopy(this, const_cast<VARIANT*>(pSrc)));
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign a const auto_var& (::VariantCopy handles everything)
|
|
//
|
|
inline auto_var& auto_var::operator=(const auto_var& varSrc) throw(_com_error)
|
|
{
|
|
Clear();
|
|
_com_util::CheckError(::VariantCopy(this, const_cast<VARIANT*>(static_cast<const VARIANT*>(&varSrc))));
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign a short creating either VT_I2 VARIANT or a
|
|
// VT_BOOL VARIANT (VT_I2 is the default)
|
|
//
|
|
inline auto_var& auto_var::operator=(short sSrc) throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_I2) {
|
|
V_I2(this) = sSrc;
|
|
}
|
|
else if (V_VT(this) == VT_BOOL) {
|
|
V_BOOL(this) = (sSrc ? VARIANT_TRUE : VARIANT_FALSE);
|
|
}
|
|
else {
|
|
// Clear the VARIANT and create a VT_I2
|
|
//
|
|
Clear();
|
|
|
|
V_VT(this) = VT_I2;
|
|
V_I2(this) = sSrc;
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign a long creating either VT_I4 VARIANT, a VT_ERROR VARIANT
|
|
// or a VT_BOOL VARIANT (VT_I4 is the default)
|
|
//
|
|
inline auto_var& auto_var::operator=(long lSrc) throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_I4) {
|
|
V_I4(this) = lSrc;
|
|
}
|
|
else if (V_VT(this) == VT_ERROR) {
|
|
V_ERROR(this) = lSrc;
|
|
}
|
|
else if (V_VT(this) == VT_BOOL) {
|
|
V_BOOL(this) = (lSrc ? VARIANT_TRUE : VARIANT_FALSE);
|
|
}
|
|
else {
|
|
// Clear the VARIANT and create a VT_I4
|
|
//
|
|
Clear();
|
|
|
|
V_VT(this) = VT_I4;
|
|
V_I4(this) = lSrc;
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign a float creating a VT_R4 VARIANT
|
|
//
|
|
inline auto_var& auto_var::operator=(float fltSrc) throw(_com_error)
|
|
{
|
|
if (V_VT(this) != VT_R4) {
|
|
// Clear the VARIANT and create a VT_R4
|
|
//
|
|
Clear();
|
|
|
|
V_VT(this) = VT_R4;
|
|
}
|
|
|
|
V_R4(this) = fltSrc;
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign a double creating either a VT_R8 VARIANT, or a VT_DATE
|
|
// VARIANT (VT_R8 is the default)
|
|
//
|
|
inline auto_var& auto_var::operator=(double dblSrc) throw(_com_error)
|
|
{
|
|
if (V_VT(this) == VT_R8) {
|
|
V_R8(this) = dblSrc;
|
|
}
|
|
else if(V_VT(this) == VT_DATE) {
|
|
V_DATE(this) == dblSrc;
|
|
}
|
|
else {
|
|
// Clear the VARIANT and create a VT_R8
|
|
//
|
|
Clear();
|
|
|
|
V_VT(this) = VT_R8;
|
|
V_R8(this) = dblSrc;
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign a CY creating a VT_CY VARIANT
|
|
//
|
|
inline auto_var& auto_var::operator=(const CY& cySrc) throw(_com_error)
|
|
{
|
|
if (V_VT(this) != VT_CY) {
|
|
// Clear the VARIANT and create a VT_CY
|
|
//
|
|
Clear();
|
|
|
|
V_VT(this) = VT_CY;
|
|
}
|
|
|
|
V_CY(this) = cySrc;
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign a const _bstr_t& creating a VT_BSTR VARIANT
|
|
//
|
|
inline auto_var& auto_var::operator=(const _bstr_t& bstrSrc) throw(_com_error)
|
|
{
|
|
// Clear the VARIANT (This will SysFreeString() any previous occupant)
|
|
//
|
|
Clear();
|
|
|
|
V_VT(this) = VT_BSTR;
|
|
|
|
if (!bstrSrc) {
|
|
V_BSTR(this) = NULL;
|
|
}
|
|
else {
|
|
BSTR bstr = static_cast<wchar_t*>(bstrSrc);
|
|
V_BSTR(this) = ::SysAllocStringByteLen(reinterpret_cast<char*>(bstr),
|
|
::SysStringByteLen(bstr));
|
|
|
|
if (V_BSTR(this) == NULL) {
|
|
_com_issue_error(E_OUTOFMEMORY);
|
|
}
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign a const wchar_t* creating a VT_BSTR VARIANT
|
|
//
|
|
inline auto_var& auto_var::operator=(const wchar_t* pSrc) throw(_com_error)
|
|
{
|
|
// Clear the VARIANT (This will SysFreeString() any previous occupant)
|
|
//
|
|
Clear();
|
|
|
|
V_VT(this) = VT_BSTR;
|
|
|
|
if (pSrc == NULL) {
|
|
V_BSTR(this) = NULL;
|
|
}
|
|
else {
|
|
V_BSTR(this) = ::SysAllocString(pSrc);
|
|
|
|
if (V_BSTR(this) == NULL) {
|
|
_com_issue_error(E_OUTOFMEMORY);
|
|
}
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign a const char* creating a VT_BSTR VARIANT
|
|
//
|
|
inline auto_var& auto_var::operator=(const char* pSrc) throw(_com_error)
|
|
{
|
|
// Clear the VARIANT (This will SysFreeString() any previous occupant)
|
|
//
|
|
Clear();
|
|
|
|
V_VT(this) = VT_BSTR;
|
|
V_BSTR(this) = _com_util::ConvertStringToBSTR(pSrc);
|
|
|
|
if (V_BSTR(this) == NULL && pSrc != NULL) {
|
|
_com_issue_error(E_OUTOFMEMORY);
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign an IDispatch* creating a VT_DISPATCH VARIANT
|
|
//
|
|
inline auto_var& auto_var::operator=(IDispatch* pSrc) throw(_com_error)
|
|
{
|
|
// Clear the VARIANT (This will Release() any previous occupant)
|
|
//
|
|
Clear();
|
|
|
|
V_VT(this) = VT_DISPATCH;
|
|
V_DISPATCH(this) = pSrc;
|
|
|
|
// Need the AddRef() as VariantClear() calls Release()
|
|
//
|
|
V_DISPATCH(this)->AddRef();
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign a bool creating a VT_BOOL VARIANT
|
|
//
|
|
inline auto_var& auto_var::operator=(bool bSrc) throw(_com_error)
|
|
{
|
|
if (V_VT(this) != VT_BOOL) {
|
|
// Clear the VARIANT and create a VT_BOOL
|
|
//
|
|
Clear();
|
|
|
|
V_VT(this) = VT_BOOL;
|
|
}
|
|
|
|
V_BOOL(this) = (bSrc ? VARIANT_TRUE : VARIANT_FALSE);
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign an IUnknown* creating a VT_UNKNOWN VARIANT
|
|
//
|
|
inline auto_var& auto_var::operator=(IUnknown* pSrc) throw(_com_error)
|
|
{
|
|
// Clear VARIANT (This will Release() any previous occupant)
|
|
//
|
|
Clear();
|
|
|
|
V_VT(this) = VT_UNKNOWN;
|
|
V_UNKNOWN(this) = pSrc;
|
|
|
|
// Need the AddRef() as VariantClear() calls Release()
|
|
//
|
|
V_UNKNOWN(this)->AddRef();
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign a DECIMAL creating a VT_DECIMAL VARIANT
|
|
//
|
|
inline auto_var& auto_var::operator=(const DECIMAL& decSrc) throw(_com_error)
|
|
{
|
|
if (V_VT(this) != VT_DECIMAL) {
|
|
// Clear the VARIANT
|
|
//
|
|
Clear();
|
|
}
|
|
|
|
// Order is important here! Setting V_DECIMAL wipes out the entire VARIANT
|
|
V_DECIMAL(this) = decSrc;
|
|
V_VT(this) = VT_DECIMAL;
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Assign a BTYE (unsigned char) creating a VT_UI1 VARIANT
|
|
//
|
|
inline auto_var& auto_var::operator=(BYTE bSrc) throw(_com_error)
|
|
{
|
|
if (V_VT(this) != VT_UI1) {
|
|
// Clear the VARIANT and create a VT_UI1
|
|
//
|
|
Clear();
|
|
|
|
V_VT(this) = VT_UI1;
|
|
}
|
|
|
|
V_UI1(this) = bSrc;
|
|
|
|
return *this;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Comparison operations
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Compare a auto_var against a const VARIANT& for equality
|
|
//
|
|
inline bool auto_var::operator==(const VARIANT& varSrc) const throw()
|
|
{
|
|
return *this == &varSrc;
|
|
}
|
|
|
|
// Compare a auto_var against a const VARIANT* for equality
|
|
//
|
|
inline bool auto_var::operator==(const VARIANT* pSrc) const throw()
|
|
{
|
|
if (this == pSrc) {
|
|
return true;
|
|
}
|
|
|
|
//
|
|
// Variants not equal if types don't match
|
|
//
|
|
if (V_VT(this) != V_VT(pSrc)) {
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// Check type specific values
|
|
//
|
|
switch (V_VT(this)) {
|
|
case VT_EMPTY:
|
|
case VT_NULL:
|
|
return true;
|
|
|
|
case VT_I2:
|
|
return V_I2(this) == V_I2(pSrc);
|
|
|
|
case VT_I4:
|
|
return V_I4(this) == V_I4(pSrc);
|
|
|
|
case VT_R4:
|
|
return V_R4(this) == V_R4(pSrc);
|
|
|
|
case VT_R8:
|
|
return V_R8(this) == V_R8(pSrc);
|
|
|
|
case VT_CY:
|
|
return memcmp(&(V_CY(this)), &(V_CY(pSrc)), sizeof(CY)) == 0;
|
|
|
|
case VT_DATE:
|
|
return V_DATE(this) == V_DATE(pSrc);
|
|
|
|
case VT_BSTR:
|
|
return (::SysStringByteLen(V_BSTR(this)) == ::SysStringByteLen(V_BSTR(pSrc))) &&
|
|
(memcmp(V_BSTR(this), V_BSTR(pSrc), ::SysStringByteLen(V_BSTR(this))) == 0);
|
|
|
|
case VT_DISPATCH:
|
|
return V_DISPATCH(this) == V_DISPATCH(pSrc);
|
|
|
|
case VT_ERROR:
|
|
return V_ERROR(this) == V_ERROR(pSrc);
|
|
|
|
case VT_BOOL:
|
|
return V_BOOL(this) == V_BOOL(pSrc);
|
|
|
|
case VT_UNKNOWN:
|
|
return V_UNKNOWN(this) == V_UNKNOWN(pSrc);
|
|
|
|
case VT_DECIMAL:
|
|
return memcmp(&(V_DECIMAL(this)), &(V_DECIMAL(pSrc)), sizeof(DECIMAL)) == 0;
|
|
|
|
case VT_UI1:
|
|
return V_UI1(this) == V_UI1(pSrc);
|
|
|
|
default:
|
|
_com_issue_error(E_INVALIDARG);
|
|
// fall through
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// Compare a auto_var against a const VARIANT& for in-equality
|
|
//
|
|
inline bool auto_var::operator!=(const VARIANT& varSrc) const throw()
|
|
{
|
|
return !(*this == &varSrc);
|
|
}
|
|
|
|
// Compare a auto_var against a const VARIANT* for in-equality
|
|
//
|
|
inline bool auto_var::operator!=(const VARIANT* pSrc) const throw()
|
|
{
|
|
return !(*this == pSrc);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Low-level operations
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Clear the auto_var
|
|
//
|
|
inline void auto_var::Clear() throw(_com_error)
|
|
{
|
|
_com_util::CheckError(::VariantClear(this));
|
|
}
|
|
|
|
inline void auto_var::Attach(VARIANT& varSrc) throw(_com_error)
|
|
{
|
|
//
|
|
// Free up previous VARIANT
|
|
//
|
|
Clear();
|
|
|
|
//
|
|
// Give control of data to auto_var
|
|
//
|
|
memcpy(this, &varSrc, sizeof(varSrc));
|
|
V_VT(&varSrc) = VT_EMPTY;
|
|
}
|
|
|
|
inline VARIANT auto_var::Detach() throw(_com_error)
|
|
{
|
|
VARIANT varResult = *this;
|
|
V_VT(this) = VT_EMPTY;
|
|
|
|
return varResult;
|
|
}
|
|
|
|
// Change the type and contents of this auto_var to the type vartype and
|
|
// contents of pSrc
|
|
//
|
|
inline void auto_var::ChangeType(VARTYPE vartype, const auto_var* pSrc) throw(_com_error)
|
|
{
|
|
//
|
|
// If pDest is NULL, convert type in place
|
|
//
|
|
if (pSrc == NULL) {
|
|
pSrc = this;
|
|
}
|
|
|
|
if ((this != pSrc) || (vartype != V_VT(this))) {
|
|
_com_util::CheckError(::VariantChangeType(static_cast<VARIANT*>(this),
|
|
const_cast<VARIANT*>(static_cast<const VARIANT*>(pSrc)),
|
|
0, vartype));
|
|
}
|
|
}
|
|
|
|
inline void auto_var::SetString(const char* pSrc) throw(_com_error)
|
|
{
|
|
//
|
|
// Free up previous VARIANT
|
|
//
|
|
Clear();
|
|
|
|
V_VT(this) = VT_BSTR;
|
|
V_BSTR(this) = _com_util::ConvertStringToBSTR(pSrc);
|
|
|
|
if (V_BSTR(this) == NULL && pSrc != NULL) {
|
|
_com_issue_error(E_OUTOFMEMORY);
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Destructor
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
inline auto_var::~auto_var() throw(_com_error)
|
|
{
|
|
_com_util::CheckError(::VariantClear(this));
|
|
}
|
|
|