994 lines
25 KiB
C++
994 lines
25 KiB
C++
/***
|
|
* comip.h - Native C++ compiler COM support - COM interface pointers header
|
|
*
|
|
* Copyright (c) Microsoft Corporation. All rights reserved.
|
|
*
|
|
****/
|
|
|
|
#if _MSC_VER > 1000
|
|
#pragma once
|
|
#endif
|
|
|
|
#ifdef _M_CEE_PURE
|
|
#error comip.h header cannot be included under /clr:safe or /clr:pure
|
|
#endif
|
|
|
|
#if !defined(_INC_COMIP)
|
|
#define _INC_COMIP
|
|
|
|
#include <ole2.h>
|
|
#include <malloc.h>
|
|
|
|
#include <comutil.h>
|
|
|
|
#pragma warning(push)
|
|
#pragma warning(disable: 4290)
|
|
|
|
#pragma push_macro("new")
|
|
#undef new
|
|
|
|
#include <new.h>
|
|
|
|
class _com_error;
|
|
|
|
void __stdcall _com_issue_error(HRESULT);
|
|
struct __declspec(uuid("00000000-0000-0000-c000-000000000046")) IUnknown;
|
|
|
|
// Provide Interface to IID association
|
|
//
|
|
template<typename _Interface, const IID* _IID /*= &__uuidof(_Interface)*/>
|
|
class _com_IIID {
|
|
public:
|
|
typedef _Interface Interface;
|
|
|
|
static _Interface* GetInterfacePtr() throw()
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static _Interface& GetInterface() throw()
|
|
{
|
|
return *GetInterfacePtr();
|
|
}
|
|
|
|
static const IID& GetIID() throw()
|
|
{
|
|
return *_IID;
|
|
}
|
|
};
|
|
|
|
template<typename _IIID> class _com_ptr_t {
|
|
public:
|
|
// Declare interface type so that the type may be available outside
|
|
// the scope of this template.
|
|
//
|
|
typedef _IIID ThisIIID;
|
|
typedef typename _IIID::Interface Interface;
|
|
|
|
// When the compiler supports references in template parameters,
|
|
// _CLSID will be changed to a reference. To avoid conversion
|
|
// difficulties this function should be used to obtain the
|
|
// CLSID.
|
|
//
|
|
static const IID& GetIID() throw()
|
|
{
|
|
return ThisIIID::GetIID();
|
|
}
|
|
|
|
// Constructs a smart-pointer from any other smart pointer.
|
|
//
|
|
template<typename _OtherIID> _com_ptr_t(const _com_ptr_t<_OtherIID>& p)
|
|
: m_pInterface(NULL)
|
|
{
|
|
HRESULT hr = _QueryInterface(p);
|
|
|
|
if (FAILED(hr) && (hr != E_NOINTERFACE)) {
|
|
_com_issue_error(hr);
|
|
}
|
|
}
|
|
|
|
// Constructs a smart-pointer from any IUnknown-based interface pointer.
|
|
//
|
|
template<typename _InterfaceType> _com_ptr_t(_InterfaceType* p)
|
|
: m_pInterface(NULL)
|
|
{
|
|
HRESULT hr = _QueryInterface(p);
|
|
|
|
if (FAILED(hr) && (hr != E_NOINTERFACE)) {
|
|
_com_issue_error(hr);
|
|
}
|
|
}
|
|
|
|
// Make sure correct ctor is called
|
|
//
|
|
template<> _com_ptr_t(_In_ LPSTR str)
|
|
{
|
|
new(this) _com_ptr_t(static_cast<LPCSTR> (str), NULL);
|
|
}
|
|
|
|
// Make sure correct ctor is called
|
|
//
|
|
template<> _com_ptr_t(_In_ LPWSTR str)
|
|
{
|
|
new(this) _com_ptr_t(static_cast<LPCWSTR> (str), NULL);
|
|
}
|
|
|
|
// Disable conversion using _com_ptr_t* specialization of
|
|
// template<typename _InterfaceType> _com_ptr_t(_InterfaceType* p)
|
|
//
|
|
template<> explicit _com_ptr_t(_com_ptr_t* p)
|
|
: m_pInterface(NULL)
|
|
{
|
|
if (p == NULL) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
else {
|
|
m_pInterface = p->m_pInterface;
|
|
AddRef();
|
|
}
|
|
}
|
|
|
|
// Default constructor.
|
|
//
|
|
_com_ptr_t() throw()
|
|
: m_pInterface(NULL)
|
|
{
|
|
}
|
|
|
|
// This constructor is provided to allow NULL assignment. It will issue
|
|
// an error if any value other than null is assigned to the object.
|
|
//
|
|
_com_ptr_t(int null)
|
|
: m_pInterface(NULL)
|
|
{
|
|
if (null != 0) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
}
|
|
|
|
#if defined(_NATIVE_NULLPTR_SUPPORTED) && !defined(_DO_NOT_USE_NULLPTR_IN_COM_PTR_T)
|
|
|
|
// This constructor is provided to allow nullptr assignment.
|
|
_com_ptr_t(decltype(__nullptr)) : m_pInterface(NULL) { }
|
|
|
|
#endif // defined(_NATIVE_NULLPTR_SUPPORTED) && !defined(_DO_NOT_USE_NULLPTR_IN_COM_PTR_T)
|
|
|
|
// Copy the pointer and AddRef().
|
|
//
|
|
_com_ptr_t(const _com_ptr_t& cp) throw()
|
|
: m_pInterface(cp.m_pInterface)
|
|
{
|
|
_AddRef();
|
|
}
|
|
|
|
// Saves the interface.
|
|
//
|
|
template<> _com_ptr_t(Interface* pInterface) throw()
|
|
: m_pInterface(pInterface)
|
|
{
|
|
_AddRef();
|
|
}
|
|
|
|
// Copies the pointer. If fAddRef is TRUE, the interface will
|
|
// be AddRef()ed.
|
|
//
|
|
_com_ptr_t(Interface* pInterface, bool fAddRef) throw()
|
|
: m_pInterface(pInterface)
|
|
{
|
|
if (fAddRef) {
|
|
_AddRef();
|
|
}
|
|
}
|
|
|
|
// Construct a pointer for a _variant_t object.
|
|
//
|
|
_com_ptr_t(const _variant_t& varSrc)
|
|
: m_pInterface(NULL)
|
|
{
|
|
HRESULT hr = QueryStdInterfaces(varSrc);
|
|
|
|
if (FAILED(hr) && (hr != E_NOINTERFACE)) {
|
|
_com_issue_error(hr);
|
|
}
|
|
}
|
|
|
|
// Calls CoCreateClass with the provided CLSID.
|
|
//
|
|
explicit _com_ptr_t(const CLSID& clsid, IUnknown* pOuter = NULL, DWORD dwClsContext = CLSCTX_ALL)
|
|
: m_pInterface(NULL)
|
|
{
|
|
HRESULT hr = CreateInstance(clsid, pOuter, dwClsContext);
|
|
|
|
if (FAILED(hr) && (hr != E_NOINTERFACE)) {
|
|
_com_issue_error(hr);
|
|
}
|
|
}
|
|
|
|
// Calls CoCreateClass with the provided CLSID retrieved from
|
|
// the string.
|
|
//
|
|
explicit _com_ptr_t(LPCWSTR str, IUnknown* pOuter = NULL, DWORD dwClsContext = CLSCTX_ALL)
|
|
: m_pInterface(NULL)
|
|
{
|
|
HRESULT hr = CreateInstance(str, pOuter, dwClsContext);
|
|
|
|
if (FAILED(hr) && (hr != E_NOINTERFACE)) {
|
|
_com_issue_error(hr);
|
|
}
|
|
}
|
|
|
|
// Calls CoCreateClass with the provided SBCS CLSID retrieved from
|
|
// the string.
|
|
//
|
|
explicit _com_ptr_t(LPCSTR str, IUnknown* pOuter = NULL, DWORD dwClsContext = CLSCTX_ALL)
|
|
: m_pInterface(NULL)
|
|
{
|
|
HRESULT hr = CreateInstance(str, pOuter, dwClsContext);
|
|
|
|
if (FAILED(hr) && (hr != E_NOINTERFACE)) {
|
|
_com_issue_error(hr);
|
|
}
|
|
}
|
|
|
|
// Queries for interface.
|
|
//
|
|
template<typename _OtherIID> _com_ptr_t& operator=(const _com_ptr_t<_OtherIID>& p)
|
|
{
|
|
HRESULT hr = _QueryInterface(p);
|
|
|
|
if (FAILED(hr) && (hr != E_NOINTERFACE)) {
|
|
_com_issue_error(hr);
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Queries for interface.
|
|
//
|
|
template<typename _InterfaceType> _com_ptr_t& operator=(_InterfaceType* p)
|
|
{
|
|
HRESULT hr = _QueryInterface(p);
|
|
|
|
if (FAILED(hr) && (hr != E_NOINTERFACE)) {
|
|
_com_issue_error(hr);
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Saves the interface.
|
|
//
|
|
template<> _com_ptr_t& operator=(Interface* pInterface) throw()
|
|
{
|
|
if (m_pInterface != pInterface) {
|
|
Interface* pOldInterface = m_pInterface;
|
|
|
|
m_pInterface = pInterface;
|
|
|
|
_AddRef();
|
|
|
|
if (pOldInterface != NULL) {
|
|
pOldInterface->Release();
|
|
}
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
// Copies and AddRef()'s the interface.
|
|
//
|
|
_com_ptr_t& operator=(const _com_ptr_t& cp) throw()
|
|
{
|
|
return operator=(cp.m_pInterface);
|
|
}
|
|
|
|
// This operator is provided to permit the assignment of NULL to the class.
|
|
// It will issue an error if any value other than NULL is assigned to it.
|
|
//
|
|
_com_ptr_t& operator=(int null)
|
|
{
|
|
if (null != 0) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
|
|
return operator=(reinterpret_cast<Interface*>(NULL));
|
|
}
|
|
|
|
// Construct a pointer for a _variant_t object.
|
|
//
|
|
_com_ptr_t& operator=(const _variant_t& varSrc)
|
|
{
|
|
HRESULT hr = QueryStdInterfaces(varSrc);
|
|
|
|
if (FAILED(hr) && (hr != E_NOINTERFACE)) {
|
|
_com_issue_error(hr);
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
// If we still have an interface then Release() it. The interface
|
|
// may be NULL if Detach() has previously been called, or if it was
|
|
// never set.
|
|
//
|
|
~_com_ptr_t() throw()
|
|
{
|
|
_Release();
|
|
}
|
|
|
|
// Saves/sets the interface without AddRef()ing. This call
|
|
// will release any previously acquired interface.
|
|
//
|
|
void Attach(Interface* pInterface) throw()
|
|
{
|
|
_Release();
|
|
m_pInterface = pInterface;
|
|
}
|
|
|
|
// Saves/sets the interface only AddRef()ing if fAddRef is TRUE.
|
|
// This call will release any previously acquired interface.
|
|
//
|
|
void Attach(Interface* pInterface, bool fAddRef) throw()
|
|
{
|
|
_Release();
|
|
m_pInterface = pInterface;
|
|
|
|
if (fAddRef) {
|
|
if (pInterface == NULL) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
else {
|
|
pInterface->AddRef();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Simply NULL the interface pointer so that it isn't Released()'ed.
|
|
//
|
|
Interface* Detach() throw()
|
|
{
|
|
Interface* const old = m_pInterface;
|
|
m_pInterface = NULL;
|
|
return old;
|
|
}
|
|
|
|
// Return the interface. This value may be NULL.
|
|
//
|
|
operator Interface*() const throw()
|
|
{
|
|
return m_pInterface;
|
|
}
|
|
|
|
// Queries for the unknown and return it
|
|
// Provides minimal level error checking before use.
|
|
//
|
|
operator Interface&() const
|
|
{
|
|
if (m_pInterface == NULL) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
|
|
return *m_pInterface;
|
|
}
|
|
|
|
// Allows an instance of this class to act as though it were the
|
|
// actual interface. Also provides minimal error checking.
|
|
//
|
|
Interface& operator*() const
|
|
{
|
|
if (m_pInterface == NULL) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
|
|
return *m_pInterface;
|
|
}
|
|
|
|
// Returns the address of the interface pointer contained in this
|
|
// class. This is useful when using the COM/OLE interfaces to create
|
|
// this interface.
|
|
//
|
|
Interface** operator&() throw()
|
|
{
|
|
_Release();
|
|
m_pInterface = NULL;
|
|
return &m_pInterface;
|
|
}
|
|
|
|
// Allows this class to be used as the interface itself.
|
|
// Also provides simple error checking.
|
|
//
|
|
Interface* operator->() const
|
|
{
|
|
if (m_pInterface == NULL) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
|
|
return m_pInterface;
|
|
}
|
|
|
|
// This operator is provided so that simple boolean expressions will
|
|
// work. For example: "if (p) ...".
|
|
// Returns TRUE if the pointer is not NULL.
|
|
//
|
|
operator bool() const throw()
|
|
{
|
|
return m_pInterface != NULL;
|
|
}
|
|
|
|
// Compare two smart pointers
|
|
//
|
|
template<typename _OtherIID> bool operator==(const _com_ptr_t<_OtherIID>& p) const
|
|
{
|
|
return _CompareUnknown(p) == 0;
|
|
}
|
|
|
|
// Compare two pointers
|
|
//
|
|
template<typename _InterfaceType> bool operator==(_InterfaceType* p) const
|
|
{
|
|
return _CompareUnknown(p) == 0;
|
|
}
|
|
|
|
// Compare with other interface
|
|
//
|
|
template<> bool operator==(Interface* p) const
|
|
{
|
|
return (m_pInterface == p)
|
|
? true
|
|
: _CompareUnknown(p) == 0;
|
|
}
|
|
|
|
// Compare two smart pointers
|
|
//
|
|
template<> bool operator==(const _com_ptr_t& p) const throw()
|
|
{
|
|
return operator==(p.m_pInterface);
|
|
}
|
|
|
|
// For comparison to NULL
|
|
//
|
|
bool operator==(int null) const
|
|
{
|
|
if (null != 0) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
|
|
return m_pInterface == NULL;
|
|
}
|
|
|
|
// Compare two smart pointers
|
|
//
|
|
template<typename _OtherIID> bool operator!=(const _com_ptr_t<_OtherIID>& p) const
|
|
{
|
|
return !(operator==(p));
|
|
}
|
|
|
|
// Compare two pointers
|
|
//
|
|
template<typename _InterfaceType> bool operator!=(_InterfaceType* p) const
|
|
{
|
|
return !(operator==(p));
|
|
}
|
|
|
|
// For comparison to NULL
|
|
//
|
|
bool operator!=(int null) const
|
|
{
|
|
return !(operator==(null));
|
|
}
|
|
|
|
// Compare two smart pointers
|
|
//
|
|
template<typename _OtherIID> bool operator<(const _com_ptr_t<_OtherIID>& p) const
|
|
{
|
|
return _CompareUnknown(p) < 0;
|
|
}
|
|
|
|
// Compare two pointers
|
|
//
|
|
template<typename _InterfaceType> bool operator<(_InterfaceType* p) const
|
|
{
|
|
return _CompareUnknown(p) < 0;
|
|
}
|
|
|
|
// Compare two smart pointers
|
|
//
|
|
template<typename _OtherIID> bool operator>(const _com_ptr_t<_OtherIID>& p) const
|
|
{
|
|
return _CompareUnknown(p) > 0;
|
|
}
|
|
|
|
// Compare two pointers
|
|
//
|
|
template<typename _InterfaceType> bool operator>(_InterfaceType* p) const
|
|
{
|
|
return _CompareUnknown(p) > 0;
|
|
}
|
|
|
|
// Compare two smart pointers
|
|
//
|
|
template<typename _OtherIID> bool operator<=(const _com_ptr_t<_OtherIID>& p) const
|
|
{
|
|
return _CompareUnknown(p) <= 0;
|
|
}
|
|
|
|
// Compare two pointers
|
|
//
|
|
template<typename _InterfaceType> bool operator<=(_InterfaceType* p) const
|
|
{
|
|
return _CompareUnknown(p) <= 0;
|
|
}
|
|
|
|
// Compare two smart pointers
|
|
//
|
|
template<typename _OtherIID> bool operator>=(const _com_ptr_t<_OtherIID>& p) const
|
|
{
|
|
return _CompareUnknown(p) >= 0;
|
|
}
|
|
|
|
// Compare two pointers
|
|
//
|
|
template<typename _InterfaceType> bool operator>=(_InterfaceType* p) const
|
|
{
|
|
return _CompareUnknown(p) >= 0;
|
|
}
|
|
|
|
// Provides error-checking Release()ing of this interface.
|
|
//
|
|
void Release()
|
|
{
|
|
if (m_pInterface == NULL) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
else {
|
|
m_pInterface->Release();
|
|
m_pInterface = NULL;
|
|
}
|
|
}
|
|
|
|
// Provides error-checking AddRef()ing of this interface.
|
|
//
|
|
void AddRef()
|
|
{
|
|
if (m_pInterface == NULL) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
else {
|
|
m_pInterface->AddRef();
|
|
}
|
|
}
|
|
|
|
// Another way to get the interface pointer without casting.
|
|
//
|
|
Interface* GetInterfacePtr() const throw()
|
|
{
|
|
return m_pInterface;
|
|
}
|
|
|
|
// Another way to get the interface pointer without casting.
|
|
// Use for [in, out] parameter passing
|
|
Interface*& GetInterfacePtr() throw()
|
|
{
|
|
return m_pInterface;
|
|
}
|
|
|
|
// Loads an interface for the provided CLSID.
|
|
// Returns an HRESULT. Any previous interface is unconditionally released.
|
|
//
|
|
HRESULT CreateInstance(const CLSID& rclsid, IUnknown* pOuter = NULL, DWORD dwClsContext = CLSCTX_ALL) throw()
|
|
{
|
|
HRESULT hr;
|
|
|
|
_Release();
|
|
|
|
if (dwClsContext & (CLSCTX_LOCAL_SERVER | CLSCTX_REMOTE_SERVER)) {
|
|
IUnknown* pIUnknown;
|
|
hr = CoCreateInstance(rclsid, pOuter, dwClsContext, __uuidof(IUnknown), reinterpret_cast<void**>(&pIUnknown));
|
|
|
|
if (SUCCEEDED(hr)) {
|
|
hr = OleRun(pIUnknown);
|
|
|
|
if (SUCCEEDED(hr)) {
|
|
hr = pIUnknown->QueryInterface(GetIID(), reinterpret_cast<void**>(&m_pInterface));
|
|
}
|
|
|
|
pIUnknown->Release();
|
|
}
|
|
}
|
|
else {
|
|
hr = CoCreateInstance(rclsid, pOuter, dwClsContext, GetIID(), reinterpret_cast<void**>(&m_pInterface));
|
|
}
|
|
|
|
if (FAILED(hr)) {
|
|
// just in case refcount = 0 and dtor gets called
|
|
m_pInterface = NULL;
|
|
}
|
|
|
|
return hr;
|
|
}
|
|
|
|
// Creates the class specified by clsidString. clsidString may
|
|
// contain a class id, or a prog id string.
|
|
//
|
|
HRESULT CreateInstance(LPCWSTR clsidString, IUnknown* pOuter = NULL, DWORD dwClsContext = CLSCTX_ALL) throw()
|
|
{
|
|
if (clsidString == NULL) {
|
|
return E_INVALIDARG;
|
|
}
|
|
|
|
CLSID clsid;
|
|
HRESULT hr;
|
|
|
|
if (clsidString[0] == L'{') {
|
|
hr = CLSIDFromString(const_cast<LPWSTR> (clsidString), &clsid);
|
|
}
|
|
else {
|
|
hr = CLSIDFromProgID(const_cast<LPWSTR> (clsidString), &clsid);
|
|
}
|
|
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
|
|
return CreateInstance(clsid, pOuter, dwClsContext);
|
|
}
|
|
|
|
// Creates the class specified by SBCS clsidString. clsidString may
|
|
// contain a class id, or a prog id string.
|
|
//
|
|
HRESULT CreateInstance(LPCSTR clsidStringA, IUnknown* pOuter = NULL, DWORD dwClsContext = CLSCTX_ALL) throw()
|
|
{
|
|
if (clsidStringA == NULL) {
|
|
return E_INVALIDARG;
|
|
}
|
|
|
|
int size = lstrlenA(clsidStringA) + 1;
|
|
int destSize = MultiByteToWideChar(CP_ACP, 0, clsidStringA, size, NULL, 0);
|
|
|
|
if (destSize == 0) {
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
LPWSTR clsidStringW;
|
|
clsidStringW = static_cast<LPWSTR>(_malloca(destSize * sizeof(WCHAR)));
|
|
|
|
if (clsidStringW == NULL) {
|
|
return E_OUTOFMEMORY;
|
|
}
|
|
|
|
if (MultiByteToWideChar(CP_ACP, 0, clsidStringA, size, clsidStringW, destSize) == 0) {
|
|
_freea(clsidStringW);
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
HRESULT hr=CreateInstance(clsidStringW, pOuter, dwClsContext);
|
|
_freea(clsidStringW);
|
|
return hr;
|
|
}
|
|
|
|
// Attach to the active object specified by rclsid.
|
|
// Any previous interface is released.
|
|
//
|
|
HRESULT GetActiveObject(const CLSID& rclsid) throw()
|
|
{
|
|
_Release();
|
|
|
|
IUnknown* pIUnknown;
|
|
|
|
HRESULT hr = ::GetActiveObject(rclsid, NULL, &pIUnknown);
|
|
|
|
if (SUCCEEDED(hr)) {
|
|
hr = pIUnknown->QueryInterface(GetIID(), reinterpret_cast<void**>(&m_pInterface));
|
|
|
|
pIUnknown->Release();
|
|
}
|
|
|
|
if (FAILED(hr)) {
|
|
// just in case refcount = 0 and dtor gets called
|
|
m_pInterface = NULL;
|
|
}
|
|
|
|
return hr;
|
|
}
|
|
|
|
// Attach to the active object specified by clsidString.
|
|
// First convert the LPCWSTR to a CLSID.
|
|
//
|
|
HRESULT GetActiveObject(LPCWSTR clsidString) throw()
|
|
{
|
|
if (clsidString == NULL) {
|
|
return E_INVALIDARG;
|
|
}
|
|
|
|
CLSID clsid;
|
|
HRESULT hr;
|
|
|
|
if (clsidString[0] == '{') {
|
|
hr = CLSIDFromString(const_cast<LPWSTR> (clsidString), &clsid);
|
|
}
|
|
else {
|
|
hr = CLSIDFromProgID(const_cast<LPWSTR> (clsidString), &clsid);
|
|
}
|
|
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
|
|
return GetActiveObject(clsid);
|
|
}
|
|
|
|
// Attach to the active object specified by clsidStringA.
|
|
// First convert the LPCSTR to a LPCWSTR.
|
|
//
|
|
HRESULT GetActiveObject(LPCSTR clsidStringA) throw()
|
|
{
|
|
if (clsidStringA == NULL) {
|
|
return E_INVALIDARG;
|
|
}
|
|
|
|
int size = lstrlenA(clsidStringA) + 1;
|
|
int destSize = MultiByteToWideChar(CP_ACP, 0, clsidStringA, size, NULL, 0);
|
|
|
|
LPWSTR clsidStringW;
|
|
__try {
|
|
clsidStringW = static_cast<LPWSTR>(_alloca(destSize * sizeof(WCHAR)));
|
|
}
|
|
__except (GetExceptionCode() == STATUS_STACK_OVERFLOW) {
|
|
clsidStringW = NULL;
|
|
}
|
|
|
|
if (clsidStringW == NULL) {
|
|
return E_OUTOFMEMORY;
|
|
}
|
|
|
|
if (MultiByteToWideChar(CP_ACP, 0, clsidStringA, size, clsidStringW, destSize) == 0) {
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
return GetActiveObject(clsidStringW);
|
|
}
|
|
|
|
// Performs the QI for the specified IID and returns it in p.
|
|
// As with all QIs, the interface will be AddRef'd.
|
|
//
|
|
template<typename _InterfaceType> HRESULT QueryInterface(const IID& iid, _InterfaceType*& p) throw ()
|
|
{
|
|
if (m_pInterface != NULL) {
|
|
return m_pInterface->QueryInterface(iid, reinterpret_cast<void**>(&p));
|
|
}
|
|
|
|
return E_POINTER;
|
|
}
|
|
|
|
// Performs the QI for the specified IID and returns it in p.
|
|
// As with all QIs, the interface will be AddRef'd.
|
|
//
|
|
template<typename _InterfaceType> HRESULT QueryInterface(const IID& iid, _InterfaceType** p) throw()
|
|
{
|
|
return QueryInterface(iid, *p);
|
|
}
|
|
|
|
private:
|
|
// The Interface.
|
|
//
|
|
Interface* m_pInterface;
|
|
|
|
// Releases only if the interface is not null.
|
|
// The interface is not set to NULL.
|
|
//
|
|
void _Release() throw()
|
|
{
|
|
if (m_pInterface != NULL) {
|
|
m_pInterface->Release();
|
|
}
|
|
}
|
|
|
|
// AddRefs only if the interface is not NULL
|
|
//
|
|
void _AddRef() throw()
|
|
{
|
|
if (m_pInterface != NULL) {
|
|
m_pInterface->AddRef();
|
|
}
|
|
}
|
|
|
|
// Performs a QI on pUnknown for the interface type returned
|
|
// for this class. The interface is stored. If pUnknown is
|
|
// NULL, or the QI fails, E_NOINTERFACE is returned and
|
|
// _pInterface is set to NULL.
|
|
//
|
|
template<typename _InterfacePtr> HRESULT _QueryInterface(_InterfacePtr p) throw()
|
|
{
|
|
HRESULT hr;
|
|
|
|
// Can't QI NULL
|
|
//
|
|
if (p != NULL) {
|
|
// Query for this interface
|
|
//
|
|
Interface* pInterface;
|
|
hr = p->QueryInterface(GetIID(), reinterpret_cast<void**>(&pInterface));
|
|
|
|
// Save the interface without AddRef()ing.
|
|
//
|
|
Attach(SUCCEEDED(hr)? pInterface: NULL);
|
|
}
|
|
else {
|
|
operator=(static_cast<Interface*>(NULL));
|
|
hr = E_NOINTERFACE;
|
|
}
|
|
|
|
return hr;
|
|
}
|
|
|
|
// Compares the provided pointer with this by obtaining IUnknown interfaces
|
|
// for each pointer and then returning the difference.
|
|
//
|
|
template<typename _InterfacePtr> int _CompareUnknown(_InterfacePtr p) const
|
|
{
|
|
IUnknown* pu1 = NULL;
|
|
IUnknown* pu2 = NULL;
|
|
|
|
if (m_pInterface != NULL) {
|
|
HRESULT hr = m_pInterface->QueryInterface(__uuidof(IUnknown), reinterpret_cast<void**>(&pu1));
|
|
|
|
if (FAILED(hr)) {
|
|
pu1 = NULL;
|
|
_com_issue_error(hr);
|
|
}
|
|
else {
|
|
pu1->Release();
|
|
}
|
|
}
|
|
|
|
if (p != NULL) {
|
|
HRESULT hr = p->QueryInterface(__uuidof(IUnknown), reinterpret_cast<void**>(&pu2));
|
|
|
|
if (FAILED(hr)) {
|
|
pu2 = NULL;
|
|
_com_issue_error(hr);
|
|
}
|
|
else {
|
|
pu2->Release();
|
|
}
|
|
}
|
|
|
|
if (pu1 == pu2)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
return (pu1 > pu2) ? 1 : -1;
|
|
}
|
|
|
|
// Try to extract either IDispatch* or an IUnknown* from
|
|
// the VARIANT
|
|
//
|
|
HRESULT QueryStdInterfaces(const _variant_t& varSrc) throw()
|
|
{
|
|
if (V_VT(&varSrc) == VT_DISPATCH) {
|
|
return _QueryInterface(V_DISPATCH(&varSrc));
|
|
}
|
|
|
|
if (V_VT(&varSrc) == VT_UNKNOWN) {
|
|
return _QueryInterface(V_UNKNOWN(&varSrc));
|
|
}
|
|
|
|
// We have something other than an IUnknown or an IDispatch.
|
|
// Can we convert it to either one of these?
|
|
// Try IDispatch first
|
|
//
|
|
VARIANT varDest;
|
|
VariantInit(&varDest);
|
|
|
|
HRESULT hr = VariantChangeType(&varDest, const_cast<VARIANT*>(static_cast<const VARIANT*>(&varSrc)), 0, VT_DISPATCH);
|
|
if (SUCCEEDED(hr)) {
|
|
hr = _QueryInterface(V_DISPATCH(&varDest));
|
|
}
|
|
|
|
if (hr == E_NOINTERFACE) {
|
|
// That failed ... so try IUnknown
|
|
//
|
|
VariantInit(&varDest);
|
|
hr = VariantChangeType(&varDest, const_cast<VARIANT*>(static_cast<const VARIANT*>(&varSrc)), 0, VT_UNKNOWN);
|
|
if (SUCCEEDED(hr)) {
|
|
hr = _QueryInterface(V_UNKNOWN(&varDest));
|
|
}
|
|
}
|
|
|
|
VariantClear(&varDest);
|
|
return hr;
|
|
}
|
|
};
|
|
|
|
// Reverse comparison operators for _com_ptr_t
|
|
//
|
|
template<typename _InterfaceType> bool operator==(int null, const _com_ptr_t<_InterfaceType>& p)
|
|
{
|
|
if (null != 0) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
|
|
return p == NULL;
|
|
}
|
|
|
|
template<typename _Interface, typename _InterfacePtr> bool operator==(_Interface* i, const _com_ptr_t<_InterfacePtr>& p)
|
|
{
|
|
return p == i;
|
|
}
|
|
|
|
template<typename _Interface> bool operator!=(int null, const _com_ptr_t<_Interface>& p)
|
|
{
|
|
if (null != 0) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
|
|
return p != NULL;
|
|
}
|
|
|
|
template<typename _Interface, typename _InterfacePtr> bool operator!=(_Interface* i, const _com_ptr_t<_InterfacePtr>& p)
|
|
{
|
|
return p != i;
|
|
}
|
|
|
|
template<typename _Interface> bool operator<(int null, const _com_ptr_t<_Interface>& p)
|
|
{
|
|
if (null != 0) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
|
|
return p > NULL;
|
|
}
|
|
|
|
template<typename _Interface, typename _InterfacePtr> bool operator<(_Interface* i, const _com_ptr_t<_InterfacePtr>& p)
|
|
{
|
|
return p > i;
|
|
}
|
|
|
|
template<typename _Interface> bool operator>(int null, const _com_ptr_t<_Interface>& p)
|
|
{
|
|
if (null != 0) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
|
|
return p < NULL;
|
|
}
|
|
|
|
template<typename _Interface, typename _InterfacePtr> bool operator>(_Interface* i, const _com_ptr_t<_InterfacePtr>& p)
|
|
{
|
|
return p < i;
|
|
}
|
|
|
|
template<typename _Interface> bool operator<=(int null, const _com_ptr_t<_Interface>& p)
|
|
{
|
|
if (null != 0) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
|
|
return p >= NULL;
|
|
}
|
|
|
|
template<typename _Interface, typename _InterfacePtr> bool operator<=(_Interface* i, const _com_ptr_t<_InterfacePtr>& p)
|
|
{
|
|
return p >= i;
|
|
}
|
|
|
|
template<typename _Interface> bool operator>=(int null, const _com_ptr_t<_Interface>& p)
|
|
{
|
|
if (null != 0) {
|
|
_com_issue_error(E_POINTER);
|
|
}
|
|
|
|
return p <= NULL;
|
|
}
|
|
|
|
template<typename _Interface, typename _InterfacePtr> bool operator>=(_Interface* i, const _com_ptr_t<_InterfacePtr>& p)
|
|
{
|
|
return p <= i;
|
|
}
|
|
|
|
#pragma pop_macro("new")
|
|
#pragma warning(pop)
|
|
|
|
#endif // _INC_COMIP
|