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- /***
- * comutil.h - Native C++ compiler COM support - BSTR, VARIANT wrappers header
- *
- * Copyright (C) 1996-1997 Microsoft Corporation
- * All rights reserved.
- *
- ****/
-
- #if !defined(_INC_COMUTIL)
- #pragma option push -b -a8 -pc -A- -w-inl /*P_O_Push __BORLANDC__: This file was forgotten in the PSDK so it was taken from the VC++ 6.0 */
- #define _INC_COMUTIL
-
- #if _MSC_VER > 1000
- #pragma once
- #endif
-
- #include <ole2.h>
-
- #pragma warning(push)
- #pragma warning(disable:4290)
- #pragma warning(disable:4310)
-
- class _com_error;
-
- void __stdcall _com_issue_error(HRESULT)
- #ifdef __BORLANDC__
- throw(_com_error)
- #endif
- ;
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Forward class declarations
- //
- //////////////////////////////////////////////////////////////////////////////
-
- class _bstr_t;
- class _variant_t;
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Error checking routines
- //
- //////////////////////////////////////////////////////////////////////////////
-
- namespace _com_util {
- inline void CheckError(HRESULT hr) throw(_com_error)
- {
- if (FAILED(hr)) {
- _com_issue_error(hr);
- }
- }
- }
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Routines for handling conversions between BSTR and char*
- //
- //////////////////////////////////////////////////////////////////////////////
-
- namespace _com_util {
- // Convert char * to BSTR
- //
- BSTR __stdcall ConvertStringToBSTR(const char* pSrc) throw(_com_error);
-
- // Convert BSTR to char *
- //
- char* __stdcall ConvertBSTRToString(BSTR pSrc) throw(_com_error);
- }
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Wrapper class for BSTR
- //
- //////////////////////////////////////////////////////////////////////////////
-
- class _bstr_t {
- public:
- // Constructors
- //
- _bstr_t() throw();
- _bstr_t(const _bstr_t& s) throw();
- _bstr_t(const char* s) throw(_com_error);
- _bstr_t(const wchar_t* s) throw(_com_error);
- _bstr_t(const _variant_t& var) throw(_com_error);
- _bstr_t(BSTR bstr, bool fCopy) throw(_com_error);
-
- // Destructor
- //
- ~_bstr_t() throw();
-
- // Assignment operators
- //
- _bstr_t& operator=(const _bstr_t& s) throw();
- _bstr_t& operator=(const char* s) throw(_com_error);
- _bstr_t& operator=(const wchar_t* s) throw(_com_error);
- _bstr_t& operator=(const _variant_t& var) throw(_com_error);
-
- // Operators
- //
- _bstr_t& operator+=(const _bstr_t& s) throw(_com_error);
- _bstr_t operator+(const _bstr_t& s) const throw(_com_error);
-
- // Friend operators
- //
- friend _bstr_t operator+(const char* s1, const _bstr_t& s2) throw(_com_error);
- friend _bstr_t operator+(const wchar_t* s1, const _bstr_t& s2) throw(_com_error);
-
- // Extractors
- //
- operator const wchar_t*() const throw();
- operator wchar_t*() const throw();
- operator const char*() const throw(_com_error);
- operator char*() const throw(_com_error);
-
- // Comparison operators
- //
- bool operator!() const throw();
- bool operator==(const _bstr_t& str) const throw();
- bool operator!=(const _bstr_t& str) const throw();
- bool operator<(const _bstr_t& str) const throw();
- bool operator>(const _bstr_t& str) const throw();
- bool operator<=(const _bstr_t& str) const throw();
- bool operator>=(const _bstr_t& str) const throw();
-
- // Low-level helper functions
- //
- BSTR copy() const throw(_com_error);
- unsigned int length() const throw();
-
- // Binary string assign
- //
- void Assign(BSTR s) throw(_com_error);
-
- private:
- // Referenced counted wrapper
- //
- class Data_t {
- public:
- // Constructors
- //
- Data_t(const char* s) throw(_com_error);
- Data_t(const wchar_t* s) throw(_com_error);
- Data_t(BSTR bstr, bool fCopy) throw(_com_error);
- Data_t(const _bstr_t& s1, const _bstr_t& s2) throw(_com_error);
-
- // Reference counting routines
- //
- unsigned long AddRef() throw();
- unsigned long Release() throw();
-
- // Extractors
- //
- operator const wchar_t*() const throw();
- operator const char*() const throw(_com_error);
-
- // Low-level helper functions
- //
- const wchar_t* GetWString() const throw();
- const char* GetString() const throw(_com_error);
-
- BSTR Copy() const throw(_com_error);
- void Assign(BSTR s) throw(_com_error);
- unsigned int Length() const throw();
- int Compare(const Data_t& str) const throw();
-
- private:
- wchar_t* m_wstr;
- mutable char* m_str;
- unsigned long m_RefCount;
-
- // Never allow default construction
- //
- Data_t() throw();
-
- // Never allow copy
- //
- Data_t(const Data_t& s) throw();
-
- // Prevent deletes from outside. Release() must be used.
- //
- ~Data_t() throw();
-
- void _Free() throw();
- };
-
- private:
- // Reference counted representation
- //
- Data_t* m_Data;
-
- private:
- // Low-level utilities
- //
- void _AddRef() throw();
- void _Free() throw();
- int _Compare(const _bstr_t& str) const throw();
- };
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Constructors
- //
- //////////////////////////////////////////////////////////////////////////////
-
- // Default constructor
- //
- inline _bstr_t::_bstr_t() throw()
- : m_Data(NULL)
- {
- }
-
- // Copy constructor
- //
- inline _bstr_t::_bstr_t(const _bstr_t& s) throw()
- : m_Data(s.m_Data)
- {
- _AddRef();
- }
-
- // Construct a _bstr_t from a const char*
- //
- inline _bstr_t::_bstr_t(const char* s) throw(_com_error)
- : m_Data(new Data_t(s))
- {
- if (m_Data == NULL) {
- _com_issue_error(E_OUTOFMEMORY);
- }
- }
-
- // Construct a _bstr_t from a const whar_t*
- //
- inline _bstr_t::_bstr_t(const wchar_t* s) throw(_com_error)
- : m_Data(new Data_t(s))
- {
- if (m_Data == NULL) {
- _com_issue_error(E_OUTOFMEMORY);
- }
- }
-
- // Construct a _bstr_t from a BSTR. If fCopy is FALSE, give control of
- // data to the _bstr_t without making a new copy.
- //
- inline _bstr_t::_bstr_t(BSTR bstr, bool fCopy) throw(_com_error)
- : m_Data(new Data_t(bstr, fCopy))
- {
- if (m_Data == NULL) {
- _com_issue_error(E_OUTOFMEMORY);
- }
- }
-
- // Destructor
- //
- inline _bstr_t::~_bstr_t() throw()
- {
- _Free();
- }
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Assignment operators
- //
- //////////////////////////////////////////////////////////////////////////////
-
- // Default assign operator
- //
- inline _bstr_t& _bstr_t::operator=(const _bstr_t& s) throw()
- {
- const_cast<_bstr_t*>(&s)->_AddRef();
- _Free();
- m_Data = s.m_Data;
-
- return *this;
- }
-
- // Assign a const char* to a _bstr_t
- //
- inline _bstr_t& _bstr_t::operator=(const char* s) throw(_com_error)
- {
- _Free();
- m_Data = new Data_t(s);
-
- return *this;
- }
-
- // Assign a const wchar_t* to a _bstr_t
- //
- inline _bstr_t& _bstr_t::operator=(const wchar_t* s) throw(_com_error)
- {
- _Free();
- m_Data = new Data_t(s);
-
- return *this;
- }
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Operators
- //
- //////////////////////////////////////////////////////////////////////////////
-
- // Concatenate a _bstr_t onto this _bstr_t
- //
- inline _bstr_t& _bstr_t::operator+=(const _bstr_t& s) throw(_com_error)
- {
- Data_t* newData = new Data_t(*this, s);
-
- _Free();
- m_Data = newData;
-
- return *this;
- }
-
- // Return the concatenation of this _bstr_t with another _bstr_t
- //
- inline _bstr_t _bstr_t::operator+(const _bstr_t& s) const throw(_com_error)
- {
- _bstr_t b = *this;
- b += s;
-
- return b;
- }
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Friend Operators
- //
- //////////////////////////////////////////////////////////////////////////////
-
- // Return the concatenation of a const char* with a _bstr_t
- //
- inline _bstr_t operator+(const char* s1, const _bstr_t& s2) throw(_com_error)
- {
- _bstr_t b = s1;
- b += s2;
-
- return b;
- }
-
- // Return the concatenation of a const char* with a _bstr_t
- //
- inline _bstr_t operator+(const wchar_t* s1, const _bstr_t& s2) throw(_com_error)
- {
- _bstr_t b = s1;
- b += s2;
-
- return b;
- }
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Extractors
- //
- //////////////////////////////////////////////////////////////////////////////
-
- // Extract a const wchar_t*
- //
- inline _bstr_t::operator const wchar_t*() const throw()
- {
- return (m_Data != NULL) ? m_Data->GetWString() : NULL;
- }
-
- // Extract a wchar_t*
- //
- inline _bstr_t::operator wchar_t*() const throw()
- {
- return const_cast<wchar_t*>((m_Data != NULL) ? m_Data->GetWString() : NULL);
- }
-
- // Extract a const char_t*
- //
- inline _bstr_t::operator const char*() const throw(_com_error)
- {
- return (m_Data != NULL) ? m_Data->GetString() : NULL;
- }
-
- // Extract a char_t*
- //
- inline _bstr_t::operator char*() const throw(_com_error)
- {
- return const_cast<char*>((m_Data != NULL) ? m_Data->GetString() : NULL);
- }
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Comparison operators
- //
- //////////////////////////////////////////////////////////////////////////////
-
- inline bool _bstr_t::operator!() const throw()
- {
- return (m_Data != NULL) ? !m_Data->GetWString() : true;
- }
-
- inline bool _bstr_t::operator==(const _bstr_t& str) const throw()
- {
- return _Compare(str) == 0;
- }
-
- inline bool _bstr_t::operator!=(const _bstr_t& str) const throw()
- {
- return _Compare(str) != 0;
- }
-
- inline bool _bstr_t::operator<(const _bstr_t& str) const throw()
- {
- return _Compare(str) < 0;
- }
-
- inline bool _bstr_t::operator>(const _bstr_t& str) const throw()
- {
- return _Compare(str) > 0;
- }
-
- inline bool _bstr_t::operator<=(const _bstr_t& str) const throw()
- {
- return _Compare(str) <= 0;
- }
-
- inline bool _bstr_t::operator>=(const _bstr_t& str) const throw()
- {
- return _Compare(str) >= 0;
- }
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Low-level help functions
- //
- //////////////////////////////////////////////////////////////////////////////
-
- // Extract a copy of the wrapped BSTR
- //
- inline BSTR _bstr_t::copy() const throw(_com_error)
- {
- return (m_Data != NULL) ? m_Data->Copy() : NULL;
- }
-
- // Return the length of the wrapped BSTR
- //
- inline unsigned int _bstr_t::length() const throw()
- {
- return (m_Data != NULL) ? m_Data->Length() : 0;
- }
-
- // Binary string assign
- //
- inline void _bstr_t::Assign(BSTR s) throw(_com_error)
- {
- if (m_Data != NULL) {
- m_Data->Assign(s);
- }
- else {
- m_Data = new Data_t(s, TRUE);
- if (m_Data == NULL) {
- _com_issue_error(E_OUTOFMEMORY);
- }
- }
- }
-
- // AddRef the BSTR
- //
- inline void _bstr_t::_AddRef() throw()
- {
- if (m_Data != NULL) {
- m_Data->AddRef();
- }
- }
-
- // Free the BSTR
- //
- inline void _bstr_t::_Free() throw()
- {
- if (m_Data != NULL) {
- m_Data->Release();
- m_Data = NULL;
- }
- }
-
- // Compare two _bstr_t objects
- //
- inline int _bstr_t::_Compare(const _bstr_t& str) const throw()
- {
- if (m_Data == str.m_Data) {
- return 0;
- }
-
- if (m_Data == NULL) {
- return -1;
- }
-
- if (str.m_Data == NULL) {
- return 1;
- }
-
- return m_Data->Compare(*str.m_Data);
- }
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Reference counted wrapper - Constructors
- //
- //////////////////////////////////////////////////////////////////////////////
-
- // Construct a Data_t from a const char*
- //
- inline _bstr_t::Data_t::Data_t(const char* s) throw(_com_error)
- : m_str(NULL), m_RefCount(1)
- {
- m_wstr = _com_util::ConvertStringToBSTR(s);
-
- if (m_wstr == NULL && s != NULL) {
- _com_issue_error(E_OUTOFMEMORY);
- }
- }
-
- // Construct a Data_t from a const wchar_t*
- //
- inline _bstr_t::Data_t::Data_t(const wchar_t* s) throw(_com_error)
- : m_str(NULL), m_RefCount(1)
- {
- m_wstr = ::SysAllocString(s);
-
- if (m_wstr == NULL && s != NULL) {
- _com_issue_error(E_OUTOFMEMORY);
- }
- }
-
- // Construct a Data_t from a BSTR. If fCopy is FALSE, give control of
- // data to the Data_t without doing a SysAllocStringByteLen.
- //
- inline _bstr_t::Data_t::Data_t(BSTR bstr, bool fCopy) throw(_com_error)
- : m_str(NULL), m_RefCount(1)
- {
- if (fCopy && bstr != NULL) {
- m_wstr = ::SysAllocStringByteLen(reinterpret_cast<char*>(bstr),
- ::SysStringByteLen(bstr));
-
- if (m_wstr == NULL) {
- _com_issue_error(E_OUTOFMEMORY);
- }
- }
- else {
- m_wstr = bstr;
- }
- }
-
- // Construct a Data_t from the concatenation of two _bstr_t objects
- //
- inline _bstr_t::Data_t::Data_t(const _bstr_t& s1, const _bstr_t& s2) throw(_com_error)
- : m_str(NULL), m_RefCount(1)
- {
- const unsigned int l1 = s1.length();
- const unsigned int l2 = s2.length();
-
- m_wstr = ::SysAllocStringByteLen(NULL, (l1 + l2) * sizeof(wchar_t));
-
- if (m_wstr == NULL) {
- if (l1 + l2 == 0) {
- return;
- }
- _com_issue_error(E_OUTOFMEMORY);
- }
-
- const wchar_t* wstr1 = static_cast<const wchar_t*>(s1);
-
- if (wstr1 != NULL) {
- memcpy(m_wstr, wstr1, (l1 + 1) * sizeof(wchar_t));
- }
-
- const wchar_t* wstr2 = static_cast<const wchar_t*>(s2);
-
- if (wstr2 != NULL) {
- memcpy(m_wstr + l1, wstr2, (l2 + 1) * sizeof(wchar_t));
- }
- }
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Reference counted wrapper - reference counting routines
- //
- //////////////////////////////////////////////////////////////////////////////
-
- inline unsigned long _bstr_t::Data_t::AddRef() throw()
- {
- InterlockedIncrement(reinterpret_cast<long*>(&m_RefCount));
- return m_RefCount;
- }
-
- inline unsigned long _bstr_t::Data_t::Release() throw()
- {
- if (!InterlockedDecrement(reinterpret_cast<long*>(&m_RefCount))) {
- delete this;
- return 0;
- }
-
- return m_RefCount;
- }
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Reference counted wrapper - extractors
- //
- //////////////////////////////////////////////////////////////////////////////
-
- // Extract a const wchar_t*
- //
- inline _bstr_t::Data_t::operator const wchar_t*() const throw()
- {
- return m_wstr;
- }
-
- // Extract a const char_t*
- //
- inline _bstr_t::Data_t::operator const char*() const throw(_com_error)
- {
- return GetString();
- }
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // Reference counted wrapper - helper functions
- //
- //////////////////////////////////////////////////////////////////////////////
-
- inline const wchar_t* _bstr_t::Data_t::GetWString() const throw()
- {
- return m_wstr;
- }
-
- inline const char* _bstr_t::Data_t::GetString() const throw(_com_error)
- {
- if (m_str == NULL) {
- m_str = _com_util::ConvertBSTRToString(m_wstr);
-
- if (m_str == NULL && m_wstr != NULL) {
- _com_issue_error(E_OUTOFMEMORY);
- }
- }
-
- return m_str;
- }
-
- // Return a copy of the wrapped BSTR
- //
- inline BSTR _bstr_t::Data_t::Copy() const throw(_com_error)
- {
- if (m_wstr != NULL) {
- BSTR bstr = ::SysAllocStringByteLen(reinterpret_cast<char*>(m_wstr),
- ::SysStringByteLen(m_wstr));
-
- if (bstr == NULL) {
- _com_issue_error(E_OUTOFMEMORY);
- }
-
- return bstr;
- }
-
- return NULL;
- }
-
- inline void _bstr_t::Data_t::Assign(BSTR s) throw(_com_error)
- {
- _Free();
- if (s != NULL) {
- m_wstr = ::SysAllocStringByteLen(reinterpret_cast<char*>(s),
- ::SysStringByteLen(s));
- }
- }
-
- // Return the length of the wrapper BSTR
- //
- inline unsigned int _bstr_t::Data_t::Length() const throw()
- {
- return m_wstr ? ::SysStringLen(m_wstr) : 0;
- }
-
- // Compare two wrapped BSTRs
- //
- inline int _bstr_t::Data_t::Compare(const _bstr_t::Data_t& str) const throw()
- {
- if (m_wstr == NULL) {
- return str.m_wstr ? -1 : 0;
- }
-
- if (str.m_wstr == NULL) {
- return 1;
- }
-
- const unsigned int l1 = ::SysStringLen(m_wstr);
- const unsigned int l2 = ::SysStringLen(str.m_wstr);
-
- unsigned int len = l1;
- if (len > l2) {
- len = l2;
- }
-
- BSTR bstr1 = m_wstr;
- BSTR bstr2 = str.m_wstr;
-
- while (len-- > 0) {
- if (*bstr1++ != *bstr2++) {
- return bstr1[-1] - bstr2[-1];
- }
- }
-
- return (l1 < l2) ? -1 : (l1 == l2) ? 0 : 1;
- }
-
- // Destruct this object
- //
- inline _bstr_t::Data_t::~Data_t() throw()
- {
- _Free();
- }
-
- // Free up this object
- //
- inline void _bstr_t::Data_t::_Free() throw()
- {
- if (m_wstr != NULL) {
- ::SysFreeString(m_wstr);
- }
-
- if (m_str != NULL) {
- delete [] m_str;
- }
- }
-
- //////////////////////////////////////////////////////////////////////////////
- //
- // 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 _variant_t
- *
- *
- * 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 _variant_t : public ::tagVARIANT {
- public:
- // Constructors
- //
- _variant_t() throw();
-
- _variant_t(const VARIANT& varSrc) throw(_com_error);
- _variant_t(const VARIANT* pSrc) throw(_com_error);
- _variant_t(const _variant_t& varSrc) throw(_com_error);
-
- _variant_t(VARIANT& varSrc, bool fCopy) throw(_com_error); // Attach VARIANT if !fCopy
-
- _variant_t(short sSrc, VARTYPE vtSrc = VT_I2) throw(_com_error); // Creates a VT_I2, or a VT_BOOL
- _variant_t(long lSrc, VARTYPE vtSrc = VT_I4) throw(_com_error); // Creates a VT_I4, a VT_ERROR, or a VT_BOOL
- _variant_t(float fltSrc) throw(); // Creates a VT_R4
- _variant_t(double dblSrc, VARTYPE vtSrc = VT_R8) throw(_com_error); // Creates a VT_R8, or a VT_DATE
- _variant_t(const CY& cySrc) throw(); // Creates a VT_CY
- _variant_t(const _bstr_t& bstrSrc) throw(_com_error); // Creates a VT_BSTR
- _variant_t(const wchar_t *pSrc) throw(_com_error); // Creates a VT_BSTR
- _variant_t(const char* pSrc) throw(_com_error); // Creates a VT_BSTR
- _variant_t(IDispatch* pSrc, bool fAddRef = true) throw(); // Creates a VT_DISPATCH
- _variant_t(bool bSrc) throw(); // Creates a VT_BOOL
- _variant_t(IUnknown* pSrc, bool fAddRef = true) throw(); // Creates a VT_UNKNOWN
- _variant_t(const DECIMAL& decSrc) throw(); // Creates a VT_DECIMAL
- _variant_t(BYTE bSrc) throw(); // Creates a VT_UI1
-
- // Destructor
- //
- ~_variant_t() 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
- //
- _variant_t& operator=(const VARIANT& varSrc) throw(_com_error);
- _variant_t& operator=(const VARIANT* pSrc) throw(_com_error);
- _variant_t& operator=(const _variant_t& varSrc) throw(_com_error);
-
- _variant_t& operator=(short sSrc) throw(_com_error); // Assign a VT_I2, or a VT_BOOL
- _variant_t& operator=(long lSrc) throw(_com_error); // Assign a VT_I4, a VT_ERROR or a VT_BOOL
- _variant_t& operator=(float fltSrc) throw(_com_error); // Assign a VT_R4
- _variant_t& operator=(double dblSrc) throw(_com_error); // Assign a VT_R8, or a VT_DATE
- _variant_t& operator=(const CY& cySrc) throw(_com_error); // Assign a VT_CY
- _variant_t& operator=(const _bstr_t& bstrSrc) throw(_com_error); // Assign a VT_BSTR
- _variant_t& operator=(const wchar_t* pSrc) throw(_com_error); // Assign a VT_BSTR
- _variant_t& operator=(const char* pSrc) throw(_com_error); // Assign a VT_BSTR
- _variant_t& operator=(IDispatch* pSrc) throw(_com_error); // Assign a VT_DISPATCH
- _variant_t& operator=(bool bSrc) throw(_com_error); // Assign a VT_BOOL
- _variant_t& operator=(IUnknown* pSrc) throw(_com_error); // Assign a VT_UNKNOWN
- _variant_t& operator=(const DECIMAL& decSrc) throw(_com_error); // Assign a VT_DECIMAL
- _variant_t& 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 _variant_t* pSrc = NULL) throw(_com_error);
-
- void SetString(const char* pSrc) throw(_com_error); // used to set ANSI string
- };
-
- //////////////////////////////////////////////////////////////////////////////////////////
- //
- // Constructors
- //
- //////////////////////////////////////////////////////////////////////////////////////////
-
- // Default constructor
- //
- inline _variant_t::_variant_t() throw()
- {
- ::VariantInit(this);
- }
-
- // Construct a _variant_t from a const VARIANT&
- //
- inline _variant_t::_variant_t(const VARIANT& varSrc) throw(_com_error)
- {
- ::VariantInit(this);
- _com_util::CheckError(::VariantCopy(this, const_cast<VARIANT*>(&varSrc)));
- }
-
- // Construct a _variant_t from a const VARIANT*
- //
- inline _variant_t::_variant_t(const VARIANT* pSrc) throw(_com_error)
- {
- ::VariantInit(this);
- _com_util::CheckError(::VariantCopy(this, const_cast<VARIANT*>(pSrc)));
- }
-
- // Construct a _variant_t from a const _variant_t&
- //
- inline _variant_t::_variant_t(const _variant_t& varSrc) throw(_com_error)
- {
- ::VariantInit(this);
- _com_util::CheckError(::VariantCopy(this, const_cast<VARIANT*>(static_cast<const VARIANT*>(&varSrc))));
- }
-
- // Construct a _variant_t from a VARIANT&. If fCopy is FALSE, give control of
- // data to the _variant_t without doing a VariantCopy.
- //
- inline _variant_t::_variant_t(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 _variant_t::_variant_t(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 _variant_t::_variant_t(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 _variant_t::_variant_t(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 _variant_t::_variant_t(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 _variant_t::_variant_t(const CY& cySrc) throw()
- {
- V_VT(this) = VT_CY;
- V_CY(this) = cySrc;
- }
-
- // Construct a VT_BSTR VARIANT from a const _bstr_t&
- //
- inline _variant_t::_variant_t(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 _variant_t::_variant_t(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 _variant_t::_variant_t(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 _variant_t::_variant_t(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 _variant_t::_variant_t(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 _variant_t::_variant_t(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 _variant_t::_variant_t(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 _variant_t::_variant_t(BYTE bSrc) throw()
- {
- V_VT(this) = VT_UI1;
- V_UI1(this) = bSrc;
- }
-
- //////////////////////////////////////////////////////////////////////////////////////////
- //
- // Extractors
- //
- //////////////////////////////////////////////////////////////////////////////////////////
-
- // Extracts a VT_I2 into a short
- //
- inline _variant_t::operator short() const throw(_com_error)
- {
- if (V_VT(this) == VT_I2) {
- return V_I2(this);
- }
-
- _variant_t varDest;
-
- varDest.ChangeType(VT_I2, this);
-
- return V_I2(&varDest);
- }
-
- // Extracts a VT_I4 into a long
- //
- inline _variant_t::operator long() const throw(_com_error)
- {
- if (V_VT(this) == VT_I4) {
- return V_I4(this);
- }
-
- _variant_t varDest;
-
- varDest.ChangeType(VT_I4, this);
-
- return V_I4(&varDest);
- }
-
- // Extracts a VT_R4 into a float
- //
- inline _variant_t::operator float() const throw(_com_error)
- {
- if (V_VT(this) == VT_R4) {
- return V_R4(this);
- }
-
- _variant_t varDest;
-
- varDest.ChangeType(VT_R4, this);
-
- return V_R4(&varDest);
- }
-
- // Extracts a VT_R8 into a double
- //
- inline _variant_t::operator double() const throw(_com_error)
- {
- if (V_VT(this) == VT_R8) {
- return V_R8(this);
- }
-
- _variant_t varDest;
-
- varDest.ChangeType(VT_R8, this);
-
- return V_R8(&varDest);
- }
-
- // Extracts a VT_CY into a CY
- //
- inline _variant_t::operator CY() const throw(_com_error)
- {
- if (V_VT(this) == VT_CY) {
- return V_CY(this);
- }
-
- _variant_t varDest;
-
- varDest.ChangeType(VT_CY, this);
-
- return V_CY(&varDest);
- }
-
- // Extracts a VT_BSTR into a _bstr_t
- //
- inline _variant_t::operator _bstr_t() const throw(_com_error)
- {
- if (V_VT(this) == VT_BSTR) {
- return V_BSTR(this);
- }
-
- _variant_t varDest;
-
- varDest.ChangeType(VT_BSTR, this);
-
- return V_BSTR(&varDest);
- }
-
- // Extracts a VT_DISPATCH into an IDispatch*
- //
- inline _variant_t::operator IDispatch*() const throw(_com_error)
- {
- if (V_VT(this) == VT_DISPATCH) {
- V_DISPATCH(this)->AddRef();
- return V_DISPATCH(this);
- }
-
- _variant_t varDest;
-
- varDest.ChangeType(VT_DISPATCH, this);
-
- V_DISPATCH(&varDest)->AddRef();
- return V_DISPATCH(&varDest);
- }
-
- // Extract a VT_BOOL into a bool
- //
- inline _variant_t::operator bool() const throw(_com_error)
- {
- if (V_VT(this) == VT_BOOL) {
- return V_BOOL(this) ? true : false;
- }
-
- _variant_t varDest;
-
- varDest.ChangeType(VT_BOOL, this);
-
- return V_BOOL(&varDest) ? true : false;
- }
-
- // Extracts a VT_UNKNOWN into an IUnknown*
- //
- inline _variant_t::operator IUnknown*() const throw(_com_error)
- {
- if (V_VT(this) == VT_UNKNOWN) {
- V_UNKNOWN(this)->AddRef();
- return V_UNKNOWN(this);
- }
-
- _variant_t varDest;
-
- varDest.ChangeType(VT_UNKNOWN, this);
-
- V_UNKNOWN(&varDest)->AddRef();
- return V_UNKNOWN(&varDest);
- }
-
- // Extracts a VT_DECIMAL into a DECIMAL
- //
- inline _variant_t::operator DECIMAL() const throw(_com_error)
- {
- if (V_VT(this) == VT_DECIMAL) {
- return V_DECIMAL(this);
- }
-
- _variant_t varDest;
-
- varDest.ChangeType(VT_DECIMAL, this);
-
- return V_DECIMAL(&varDest);
- }
-
- // Extracts a VT_UI1 into a BYTE (unsigned char)
- //
- inline _variant_t::operator BYTE() const throw(_com_error)
- {
- if (V_VT(this) == VT_UI1) {
- return V_UI1(this);
- }
-
- _variant_t varDest;
-
- varDest.ChangeType(VT_UI1, this);
-
- return V_UI1(&varDest);
- }
-
- //////////////////////////////////////////////////////////////////////////////////////////
- //
- // Assignment operations
- //
- //////////////////////////////////////////////////////////////////////////////////////////
-
- // Assign a const VARIANT& (::VariantCopy handles everything)
- //
- inline _variant_t& _variant_t::operator=(const VARIANT& varSrc) throw(_com_error)
- {
- _com_util::CheckError(::VariantCopy(this, const_cast<VARIANT*>(&varSrc)));
-
- return *this;
- }
-
- // Assign a const VARIANT* (::VariantCopy handles everything)
- //
- inline _variant_t& _variant_t::operator=(const VARIANT* pSrc) throw(_com_error)
- {
- _com_util::CheckError(::VariantCopy(this, const_cast<VARIANT*>(pSrc)));
-
- return *this;
- }
-
- // Assign a const _variant_t& (::VariantCopy handles everything)
- //
- inline _variant_t& _variant_t::operator=(const _variant_t& varSrc) throw(_com_error)
- {
- _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 _variant_t& _variant_t::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 _variant_t& _variant_t::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 _variant_t& _variant_t::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 _variant_t& _variant_t::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 _variant_t& _variant_t::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 _variant_t& _variant_t::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 _variant_t& _variant_t::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 _variant_t& _variant_t::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 _variant_t& _variant_t::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 _variant_t& _variant_t::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 _variant_t& _variant_t::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 _variant_t& _variant_t::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 _variant_t& _variant_t::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 _variant_t against a const VARIANT& for equality
- //
- inline bool _variant_t::operator==(const VARIANT& varSrc) const throw(_com_error)
- {
- return *this == &varSrc;
- }
-
- // Compare a _variant_t against a const VARIANT* for equality
- //
- inline bool _variant_t::operator==(const VARIANT* pSrc) const throw(_com_error)
- {
- 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 _variant_t against a const VARIANT& for in-equality
- //
- inline bool _variant_t::operator!=(const VARIANT& varSrc) const throw(_com_error)
- {
- return !(*this == &varSrc);
- }
-
- // Compare a _variant_t against a const VARIANT* for in-equality
- //
- inline bool _variant_t::operator!=(const VARIANT* pSrc) const throw(_com_error)
- {
- return !(*this == pSrc);
- }
-
- //////////////////////////////////////////////////////////////////////////////////////////
- //
- // Low-level operations
- //
- //////////////////////////////////////////////////////////////////////////////////////////
-
- // Clear the _variant_t
- //
- inline void _variant_t::Clear() throw(_com_error)
- {
- _com_util::CheckError(::VariantClear(this));
- }
-
- inline void _variant_t::Attach(VARIANT& varSrc) throw(_com_error)
- {
- //
- // Free up previous VARIANT
- //
- Clear();
-
- //
- // Give control of data to _variant_t
- //
- memcpy(this, &varSrc, sizeof(varSrc));
- V_VT(&varSrc) = VT_EMPTY;
- }
-
- inline VARIANT _variant_t::Detach() throw(_com_error)
- {
- VARIANT varResult = *this;
- V_VT(this) = VT_EMPTY;
-
- return varResult;
- }
-
- // Change the type and contents of this _variant_t to the type vartype and
- // contents of pSrc
- //
- inline void _variant_t::ChangeType(VARTYPE vartype, const _variant_t* 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 _variant_t::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 _variant_t::~_variant_t() throw(_com_error)
- {
- _com_util::CheckError(::VariantClear(this));
- }
-
- //////////////////////////////////////////////////////////////////////////////////////////
- //
- // Mutually-dependent definitions
- //
- //////////////////////////////////////////////////////////////////////////////////////////
-
- // Construct a _bstr_t from a const _variant_t&
- //
- inline _bstr_t::_bstr_t(const _variant_t &var) throw(_com_error)
- : m_Data(NULL)
- {
- if (V_VT(&var) == VT_BSTR) {
- *this = V_BSTR(&var);
- return;
- }
-
- _variant_t varDest;
-
- varDest.ChangeType(VT_BSTR, &var);
-
- *this = V_BSTR(&varDest);
- }
-
- // Assign a const _variant_t& to a _bstr_t
- //
- inline _bstr_t& _bstr_t::operator=(const _variant_t &var) throw(_com_error)
- {
- if (V_VT(&var) == VT_BSTR) {
- *this = V_BSTR(&var);
- return *this;
- }
-
- _variant_t varDest;
-
- varDest.ChangeType(VT_BSTR, &var);
-
- *this = V_BSTR(&varDest);
-
- return *this;
- }
-
- extern _variant_t vtMissing;
-
- #ifndef _USE_RAW
- #define bstr_t _bstr_t
- #define variant_t _variant_t
- #endif
-
- #pragma warning(pop)
-
- #pragma option pop /*P_O_Pop*/
- #endif // _INC_COMUTIL
-