1086 lines
29 KiB
C++
1086 lines
29 KiB
C++
/*
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SPDX-License-Identifier: MIT
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Copyright © 1991-2022 Amebis
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Copyright © 2016 GÉANT
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*/
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#pragma once
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#include "Common.h"
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#include <unknwn.h>
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#include <string>
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namespace winstd
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{
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/// \addtogroup WinStdExceptions
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/// @{
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///
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/// COM runtime error
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///
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/// \note Must be defined as derived class from num_runtime_error<> to allow correct type info for dynamic typecasting and prevent folding with other derivates of num_runtime_error<>.
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///
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class com_runtime_error : public num_runtime_error<HRESULT>
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{
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public:
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///
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/// Constructs an exception
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///
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/// \param[in] num COM error code
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/// \param[in] msg Error message
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///
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com_runtime_error(_In_ error_type num, _In_ const std::string& msg) : num_runtime_error<HRESULT>(num, msg)
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{
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}
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///
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/// Constructs an exception
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///
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/// \param[in] num COM error code
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/// \param[in] msg Error message
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///
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com_runtime_error(_In_ error_type num, _In_opt_z_ const char *msg = nullptr) : num_runtime_error<HRESULT>(num, msg)
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{
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}
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};
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/// @}
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///
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/// \defgroup WinStdCOM COM object management
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/// Provides helper templates for Windows COM object manipulation
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///
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/// @{
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///
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/// Deleter for unique_ptr using CoTaskMemFree
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///
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struct CoTaskMemFree_delete
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{
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///
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/// Default constructor
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///
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CoTaskMemFree_delete() noexcept {}
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///
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/// Delete a pointer
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///
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/// \sa [CoTaskMemFree function](https://docs.microsoft.com/en-us/windows/desktop/api/combaseapi/nf-combaseapi-cotaskmemfree)
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///
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template <class _T>
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void operator()(_T *_Ptr) const
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{
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CoTaskMemFree(_Ptr);
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}
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};
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///
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/// COM object wrapper template
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///
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/// \sa [CoCreateInstance function](https://msdn.microsoft.com/en-us/library/windows/desktop/ms686615.aspx)
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///
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template <class T>
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class com_obj : public dplhandle<T*, NULL>
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{
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WINSTD_DPLHANDLE_IMPL(com_obj, NULL)
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public:
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///
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/// Queries the object for another interface and creates new class with it
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///
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/// \sa [IUnknown::QueryInterface method](https://msdn.microsoft.com/en-us/library/windows/desktop/ms682521.aspx)
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///
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template <class _Other>
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com_obj(_In_ _Other *other)
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{
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assert(other);
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other->QueryInterface(__uuidof(T), (void**)&m_h);
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}
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///
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/// Queries the object for another interface and creates new class with it
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///
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/// \sa [IUnknown::QueryInterface method](https://msdn.microsoft.com/en-us/library/windows/desktop/ms682521.aspx)
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///
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template <class _Other>
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com_obj(_In_ com_obj<_Other> &other)
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{
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other->QueryInterface(__uuidof(T), (void**)&m_h);
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}
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///
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/// Releases object
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///
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virtual ~com_obj()
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{
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if (m_h != invalid)
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free_internal();
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}
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///
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/// Queries the object for another interface
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///
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/// \sa [IUnknown::QueryInterface method](https://msdn.microsoft.com/en-us/library/windows/desktop/ms682521.aspx)
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///
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template <class _Other>
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HRESULT query_interface(_Out_ _Other **h) const
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{
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assert(h);
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assert(m_h);
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return m_h->QueryInterface(__uuidof(_Other), (void**)h);
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}
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///
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/// Queries the object for another interface
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///
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/// \sa [IUnknown::QueryInterface method](https://msdn.microsoft.com/en-us/library/windows/desktop/ms682521.aspx)
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///
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template <class _Other>
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HRESULT query_interface(_Out_ com_obj<_Other> &h) const
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{
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assert(m_h);
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_Other *_h;
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HRESULT hr = m_h->QueryInterface(__uuidof(_Other), (void**)&_h);
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if (SUCCEEDED(hr))
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h.attach(_h);
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return hr;
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}
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protected:
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///
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/// Releases the object by decrementing reference counter
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///
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/// \sa [IUnknown::Release method](https://msdn.microsoft.com/en-us/library/windows/desktop/ms682317.aspx)
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///
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void free_internal() noexcept override
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{
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m_h->Release();
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}
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///
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/// Duplicates the object by incrementing the reference counter
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///
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/// \sa [IUnknown::AddRef method](https://msdn.microsoft.com/en-us/library/windows/desktop/ms691379.aspx)
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///
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/// \param[in] h Object handle of existing object
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///
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/// \return Duplicated object handle
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///
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handle_type duplicate_internal(_In_ handle_type h) const noexcept override
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{
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h->AddRef();
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return h;
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}
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};
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///
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/// BSTR string wrapper
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///
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class bstr : public dplhandle<BSTR, NULL>
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{
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WINSTD_DPLHANDLE_IMPL(bstr, NULL)
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public:
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///
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/// Constructs BSTR from OLE string
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///
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bstr(_In_ LPCOLESTR src) noexcept
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{
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m_h = SysAllocString(src);
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}
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///
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/// Constructs BSTR from OLE string with length
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///
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bstr(_In_ LPCOLESTR src, _In_ UINT len) noexcept
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{
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m_h = SysAllocStringLen(src, len);
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}
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///
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/// Constructs BSTR from std::basic_string
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///
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template<class _Traits, class _Ax>
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bstr(_In_ const std::basic_string<wchar_t, _Traits, _Ax> &src) noexcept
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{
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m_h = SysAllocStringLen(src.c_str(), (UINT)src.length());
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}
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///
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/// Destroys the string
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///
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/// \sa [SysFreeString function](https://msdn.microsoft.com/en-us/library/windows/desktop/ms221481.aspx)
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///
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virtual ~bstr()
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{
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if (m_h != invalid)
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free_internal();
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}
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///
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/// Returns the length of the string
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///
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/// \sa [SysStringLen function](https://msdn.microsoft.com/en-us/library/windows/desktop/ms221240.aspx)
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///
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UINT length() const noexcept
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{
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return SysStringLen(m_h);
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}
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protected:
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///
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/// Destroys the string
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///
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/// \sa [SysFreeString function](https://msdn.microsoft.com/en-us/library/windows/desktop/ms221481.aspx)
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///
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void free_internal() noexcept override
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{
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SysFreeString(m_h);
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}
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///
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/// Duplicates the string
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///
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/// \param[in] h Existing string
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///
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/// \return Duplicated string
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///
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/// \sa [SysAllocString function](https://msdn.microsoft.com/en-us/library/windows/desktop/ms221458.aspx)
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///
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handle_type duplicate_internal(_In_ handle_type h) const noexcept override
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{
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return SysAllocStringLen(h, SysStringLen(h));
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}
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};
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///
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/// VARIANT struct wrapper
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///
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#pragma warning(push)
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#pragma warning(disable: 26432) // Copy constructor and assignment operator are also present, but not detected by code analysis as they are using base type source object reference.
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class variant : public VARIANT
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{
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public:
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///
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/// Constructs blank VARIANT
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///
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variant() noexcept
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{
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VariantInit(this);
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}
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///
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/// Constructs VARIANT from another
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///
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variant(_In_ const VARIANT& varSrc)
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{
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vt = VT_EMPTY;
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const HRESULT hr = VariantCopy(this, &varSrc);
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if (FAILED(hr))
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throw winstd::com_runtime_error(hr, "VariantCopy failed.");
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}
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///
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/// Moves VARIANT from another
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///
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#pragma warning(suppress: 26495) // vt member is initialized as a result of memcpy()
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variant(_Inout_ VARIANT&& varSrc) noexcept
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{
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memcpy(this, &varSrc, sizeof(VARIANT));
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varSrc.vt = VT_EMPTY;
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}
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///
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/// Constructs VARIANT from bool
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///
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variant(_In_ bool bSrc) noexcept
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{
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vt = VT_BOOL;
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boolVal = bSrc ? VARIANT_TRUE : VARIANT_FALSE;
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}
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///
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/// Constructs VARIANT from character
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///
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variant(_In_ char cSrc) noexcept
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{
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vt = VT_I1;
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cVal = cSrc;
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}
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///
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/// Constructs VARIANT from byte
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///
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variant(_In_ unsigned char nSrc) noexcept
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{
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vt = VT_UI1;
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bVal = nSrc;
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}
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///
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/// Constructs VARIANT from short
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///
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variant(_In_ short nSrc) noexcept
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{
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vt = VT_I2;
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iVal = nSrc;
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}
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///
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/// Constructs VARIANT from unsigned short
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///
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variant(_In_ unsigned short nSrc) noexcept
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{
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vt = VT_UI2;
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uiVal = nSrc;
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}
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///
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/// Constructs VARIANT from integer
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///
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variant(_In_ int nSrc, _In_ VARTYPE vtSrc = VT_I4) noexcept
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{
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assert(vtSrc == VT_I4 || vtSrc == VT_INT);
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vt = vtSrc;
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intVal = nSrc;
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}
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///
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/// Constructs VARIANT from unsigned integer
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///
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variant(_In_ unsigned int nSrc, _In_ VARTYPE vtSrc = VT_UI4) noexcept
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{
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assert(vtSrc == VT_UI4 || vtSrc == VT_UINT);
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vt = vtSrc;
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uintVal= nSrc;
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}
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///
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/// Constructs VARIANT from long
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///
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variant(_In_ long nSrc, _In_ VARTYPE vtSrc = VT_I4) noexcept
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{
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assert(vtSrc == VT_I4 || vtSrc == VT_ERROR);
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vt = vtSrc;
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lVal = nSrc;
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}
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///
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/// Constructs VARIANT from unsigned long
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///
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variant(_In_ unsigned long nSrc) noexcept
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{
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vt = VT_UI4;
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ulVal = nSrc;
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}
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///
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/// Constructs VARIANT from float
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///
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variant(_In_ float fltSrc) noexcept
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{
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vt = VT_R4;
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fltVal = fltSrc;
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}
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///
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/// Constructs VARIANT from double or variant date
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///
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variant(_In_ double dblSrc, _In_ VARTYPE vtSrc = VT_R8) noexcept
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{
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assert(vtSrc == VT_R8 || vtSrc == VT_DATE);
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vt = vtSrc;
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dblVal = dblSrc;
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}
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///
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/// Constructs VARIANT from 64-bit integer
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///
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variant(_In_ long long nSrc) noexcept
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{
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vt = VT_I8;
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llVal = nSrc;
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}
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///
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/// Constructs VARIANT from unsigned integer
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///
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variant(_In_ unsigned long long nSrc) noexcept
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{
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vt = VT_UI8;
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ullVal = nSrc;
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}
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///
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/// Constructs VARIANT from CY (64-bit integer)
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///
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variant(_In_ CY cySrc) noexcept
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{
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vt = VT_CY;
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cyVal.Hi = cySrc.Hi;
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cyVal.Lo = cySrc.Lo;
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}
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///
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/// Constructs VARIANT from OLE string
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///
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variant(_In_z_ LPCOLESTR lpszSrc) noexcept
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{
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vt = VT_EMPTY;
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*this = lpszSrc;
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}
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///
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/// Constructs VARIANT from BSTR
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///
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variant(_In_z_ BSTR bstr) noexcept
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{
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vt = VT_EMPTY;
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*this = bstr;
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}
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///
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/// Constructs VARIANT from IDispatch
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///
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variant(_In_opt_ IDispatch* pSrc)
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{
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vt = VT_DISPATCH;
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pdispVal = pSrc;
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if (pdispVal != NULL)
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pdispVal->AddRef();
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}
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///
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/// Constructs VARIANT from IUnknown
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///
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variant(_In_opt_ IUnknown* pSrc)
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{
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vt = VT_UNKNOWN;
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punkVal = pSrc;
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if (punkVal != NULL)
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punkVal->AddRef();
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}
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///
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/// Constructs VARIANT from SAFEARRAY
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///
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variant(_In_ const SAFEARRAY *pSrc)
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{
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assert(pSrc != NULL);
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LPSAFEARRAY pCopy;
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const HRESULT hr = SafeArrayCopy(const_cast<LPSAFEARRAY>(pSrc), &pCopy);
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if (FAILED(hr))
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throw winstd::com_runtime_error(hr, "SafeArrayCopy failed.");
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SafeArrayGetVartype(const_cast<LPSAFEARRAY>(pSrc), &vt);
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vt |= VT_ARRAY;
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parray = pCopy;
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}
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///
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/// Destroys VARIANT
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///
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virtual ~variant()
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{
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VariantClear(this);
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}
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///
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/// Copy from another VARIANT
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///
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variant& operator=(_In_ const VARIANT& varSrc)
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{
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if (this != &varSrc) {
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const HRESULT hr = VariantCopy(this, &varSrc);
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if (FAILED(hr))
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throw winstd::com_runtime_error(hr, "VariantCopy failed.");
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}
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return *this;
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}
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|
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///
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/// Moves from another VARIANT
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///
|
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variant& operator=(_Inout_ VARIANT&& varSrc) noexcept
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{
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if (this != &varSrc) {
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VariantClear(this);
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memcpy(this, &varSrc, sizeof(VARIANT));
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varSrc.vt = VT_EMPTY;
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}
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return *this;
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}
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|
|
///
|
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/// Copy from bool value
|
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///
|
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variant& operator=(_In_ bool bSrc) noexcept
|
|
{
|
|
if (vt != VT_BOOL) {
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VariantClear(this);
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vt = VT_BOOL;
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}
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boolVal = bSrc ? VARIANT_TRUE : VARIANT_FALSE;
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return *this;
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}
|
|
|
|
///
|
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/// Copy from char value
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///
|
|
variant& operator=(_In_ char cSrc) noexcept
|
|
{
|
|
if (vt != VT_I1) {
|
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VariantClear(this);
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vt = VT_I1;
|
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}
|
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cVal = cSrc;
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return *this;
|
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}
|
|
|
|
///
|
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/// Copy from unsigned char value
|
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///
|
|
variant& operator=(_In_ unsigned char nSrc) noexcept
|
|
{
|
|
if (vt != VT_UI1) {
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VariantClear(this);
|
|
vt = VT_UI1;
|
|
}
|
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bVal = nSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from short value
|
|
///
|
|
variant& operator=(_In_ short nSrc) noexcept
|
|
{
|
|
if (vt != VT_I2) {
|
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VariantClear(this);
|
|
vt = VT_I2;
|
|
}
|
|
iVal = nSrc;
|
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return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from unsigned short value
|
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///
|
|
variant& operator=(_In_ unsigned short nSrc) noexcept
|
|
{
|
|
if (vt != VT_UI2) {
|
|
VariantClear(this);
|
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vt = VT_UI2;
|
|
}
|
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uiVal = nSrc;
|
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return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from int value
|
|
///
|
|
variant& operator=(_In_ int nSrc) noexcept
|
|
{
|
|
if (vt != VT_I4) {
|
|
VariantClear(this);
|
|
vt = VT_I4;
|
|
}
|
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intVal = nSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from unsigned int value
|
|
///
|
|
variant& operator=(_In_ unsigned int nSrc) noexcept
|
|
{
|
|
if (vt != VT_UI4) {
|
|
VariantClear(this);
|
|
vt = VT_UI4;
|
|
}
|
|
uintVal= nSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from long value
|
|
///
|
|
variant& operator=(_In_ long nSrc) noexcept
|
|
{
|
|
if (vt != VT_I4) {
|
|
VariantClear(this);
|
|
vt = VT_I4;
|
|
}
|
|
lVal = nSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from unsigned long value
|
|
///
|
|
variant& operator=(_In_ unsigned long nSrc) noexcept
|
|
{
|
|
if (vt != VT_UI4) {
|
|
VariantClear(this);
|
|
vt = VT_UI4;
|
|
}
|
|
ulVal = nSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from long long value
|
|
///
|
|
variant& operator=(_In_ long long nSrc) noexcept
|
|
{
|
|
if (vt != VT_I8) {
|
|
VariantClear(this);
|
|
vt = VT_I8;
|
|
}
|
|
llVal = nSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from unsigned long long value
|
|
///
|
|
variant& operator=(_In_ unsigned long long nSrc) noexcept
|
|
{
|
|
if (vt != VT_UI8) {
|
|
VariantClear(this);
|
|
vt = VT_UI8;
|
|
}
|
|
ullVal = nSrc;
|
|
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from float value
|
|
///
|
|
variant& operator=(_In_ float fltSrc) noexcept
|
|
{
|
|
if (vt != VT_R4) {
|
|
VariantClear(this);
|
|
vt = VT_R4;
|
|
}
|
|
fltVal = fltSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from double value
|
|
///
|
|
variant& operator=(_In_ double dblSrc) noexcept
|
|
{
|
|
if (vt != VT_R8) {
|
|
VariantClear(this);
|
|
vt = VT_R8;
|
|
}
|
|
dblVal = dblSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from CY value
|
|
///
|
|
variant& operator=(_In_ CY cySrc) noexcept
|
|
{
|
|
if (vt != VT_CY) {
|
|
VariantClear(this);
|
|
vt = VT_CY;
|
|
}
|
|
cyVal.Hi = cySrc.Hi;
|
|
cyVal.Lo = cySrc.Lo;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from OLE string value
|
|
///
|
|
variant& operator=(_In_z_ LPCOLESTR lpszSrc) noexcept
|
|
{
|
|
VariantClear(this);
|
|
vt = VT_BSTR;
|
|
bstrVal = SysAllocString(lpszSrc);
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from IDispatch
|
|
///
|
|
variant& operator=(_Inout_opt_ IDispatch* pSrc)
|
|
{
|
|
VariantClear(this);
|
|
vt = VT_DISPATCH;
|
|
pdispVal = pSrc;
|
|
if (pdispVal != NULL)
|
|
pdispVal->AddRef();
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from IUnknown
|
|
///
|
|
variant& operator=(_Inout_opt_ IUnknown* pSrc)
|
|
{
|
|
VariantClear(this);
|
|
vt = VT_UNKNOWN;
|
|
punkVal = pSrc;
|
|
if (punkVal != NULL)
|
|
punkVal->AddRef();
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from unsigned char reference
|
|
///
|
|
variant& operator=(_In_ unsigned char* pbSrc) noexcept
|
|
{
|
|
if (vt != (VT_UI1|VT_BYREF)) {
|
|
VariantClear(this);
|
|
vt = VT_UI1|VT_BYREF;
|
|
}
|
|
pbVal = pbSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from short reference
|
|
///
|
|
variant& operator=(_In_ short* pnSrc) noexcept
|
|
{
|
|
if (vt != (VT_I2|VT_BYREF)) {
|
|
VariantClear(this);
|
|
vt = VT_I2|VT_BYREF;
|
|
}
|
|
piVal = pnSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from unsigned short reference
|
|
///
|
|
variant& operator=(_In_ unsigned short* pnSrc) noexcept
|
|
{
|
|
if (vt != (VT_UI2|VT_BYREF)) {
|
|
VariantClear(this);
|
|
vt = VT_UI2|VT_BYREF;
|
|
}
|
|
puiVal = pnSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from int reference
|
|
///
|
|
variant& operator=(_In_ int* pnSrc) noexcept
|
|
{
|
|
if (vt != (VT_I4|VT_BYREF)) {
|
|
VariantClear(this);
|
|
vt = VT_I4|VT_BYREF;
|
|
}
|
|
pintVal = pnSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from unsigned int reference
|
|
///
|
|
variant& operator=(_In_ unsigned int* pnSrc) noexcept
|
|
{
|
|
if (vt != (VT_UI4|VT_BYREF)) {
|
|
VariantClear(this);
|
|
vt = VT_UI4|VT_BYREF;
|
|
}
|
|
puintVal = pnSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from long reference
|
|
///
|
|
variant& operator=(_In_ long* pnSrc) noexcept
|
|
{
|
|
if (vt != (VT_I4|VT_BYREF)) {
|
|
VariantClear(this);
|
|
vt = VT_I4|VT_BYREF;
|
|
}
|
|
plVal = pnSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from unsigned long reference
|
|
///
|
|
variant& operator=(_In_ unsigned long* pnSrc) noexcept
|
|
{
|
|
if (vt != (VT_UI4|VT_BYREF)) {
|
|
VariantClear(this);
|
|
vt = VT_UI4|VT_BYREF;
|
|
}
|
|
pulVal = pnSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from long long reference
|
|
///
|
|
variant& operator=(_In_ long long* pnSrc) noexcept
|
|
{
|
|
if (vt != (VT_I8|VT_BYREF)) {
|
|
VariantClear(this);
|
|
vt = VT_I8|VT_BYREF;
|
|
}
|
|
pllVal = pnSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from unsigned long long reference
|
|
///
|
|
variant& operator=(_In_ unsigned long long* pnSrc) noexcept
|
|
{
|
|
if (vt != (VT_UI8|VT_BYREF)) {
|
|
VariantClear(this);
|
|
vt = VT_UI8|VT_BYREF;
|
|
}
|
|
pullVal = pnSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from float reference
|
|
///
|
|
variant& operator=(_In_ float* pfSrc) noexcept
|
|
{
|
|
if (vt != (VT_R4|VT_BYREF)) {
|
|
VariantClear(this);
|
|
vt = VT_R4|VT_BYREF;
|
|
}
|
|
pfltVal = pfSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from double reference
|
|
///
|
|
variant& operator=(_In_ double* pfSrc) noexcept
|
|
{
|
|
if (vt != (VT_R8|VT_BYREF)) {
|
|
VariantClear(this);
|
|
vt = VT_R8|VT_BYREF;
|
|
}
|
|
pdblVal = pfSrc;
|
|
return *this;
|
|
}
|
|
|
|
///
|
|
/// Copy from SAFEARRAY
|
|
///
|
|
variant& operator=(_In_ const SAFEARRAY *pSrc) noexcept
|
|
{
|
|
assert(pSrc != NULL);
|
|
VariantClear(this);
|
|
|
|
LPSAFEARRAY pCopy;
|
|
const HRESULT hr = SafeArrayCopy(const_cast<LPSAFEARRAY>(pSrc), &pCopy);
|
|
if (SUCCEEDED(hr)) {
|
|
SafeArrayGetVartype(const_cast<LPSAFEARRAY>(pSrc), &vt);
|
|
vt |= VT_ARRAY;
|
|
parray = pCopy;
|
|
} else
|
|
assert(0);
|
|
|
|
return *this;
|
|
}
|
|
|
|
public:
|
|
///
|
|
/// Is variant equal to?
|
|
///
|
|
/// \param[in] varSrc Variant to compare against
|
|
/// \return
|
|
/// - Non zero when variant is equal to \p varSrc;
|
|
/// - Zero otherwise.
|
|
///
|
|
bool operator==(_In_ const VARIANT& varSrc) const noexcept
|
|
{
|
|
if (vt == VT_NULL && varSrc.vt == VT_NULL) return true;
|
|
if (vt != varSrc.vt) return false;
|
|
return compare(static_cast<const VARIANT&>(*this), varSrc, LOCALE_USER_DEFAULT, 0) == static_cast<HRESULT>(VARCMP_EQ);
|
|
}
|
|
|
|
///
|
|
/// Is variant not equal to?
|
|
///
|
|
/// \param[in] varSrc Variant to compare against
|
|
/// \return
|
|
/// - Non zero when variant is not equal to \p varSrc;
|
|
/// - Zero otherwise.
|
|
///
|
|
bool operator!=(_In_ const VARIANT& varSrc) const noexcept
|
|
{
|
|
return !operator==(varSrc);
|
|
}
|
|
|
|
///
|
|
/// Is variant less than?
|
|
///
|
|
/// \param[in] varSrc Variant to compare against
|
|
/// \return
|
|
/// - Non zero when variant is less than \p varSrc;
|
|
/// - Zero otherwise.
|
|
///
|
|
bool operator<(_In_ const VARIANT& varSrc) const noexcept
|
|
{
|
|
if (vt == VT_NULL && varSrc.vt == VT_NULL) return false;
|
|
return compare(static_cast<const VARIANT&>(*this), varSrc, LOCALE_USER_DEFAULT, 0)== static_cast<HRESULT>(VARCMP_LT);
|
|
}
|
|
|
|
///
|
|
/// Is variant greater than?
|
|
///
|
|
/// \param[in] varSrc Variant to compare against
|
|
/// \return
|
|
/// - Non zero when variant is greater than \p varSrc;
|
|
/// - Zero otherwise.
|
|
///
|
|
bool operator>(_In_ const VARIANT& varSrc) const noexcept
|
|
{
|
|
if (vt == VT_NULL && varSrc.vt == VT_NULL) return false;
|
|
return compare(static_cast<const VARIANT&>(*this), varSrc, LOCALE_USER_DEFAULT, 0)== static_cast<HRESULT>(VARCMP_GT);
|
|
}
|
|
|
|
///
|
|
/// Is variant less than or equal to?
|
|
///
|
|
/// \param[in] varSrc Variant to compare against
|
|
/// \return
|
|
/// - Non zero when variant is less than or equal to \p varSrc;
|
|
/// - Zero otherwise.
|
|
///
|
|
bool operator<=(_In_ const VARIANT& varSrc) const noexcept
|
|
{
|
|
return !operator>(varSrc);
|
|
}
|
|
|
|
///
|
|
/// Is variant greater than or equal to?
|
|
///
|
|
/// \param[in] varSrc Variant to compare against
|
|
/// \return
|
|
/// - Non zero when variant is greater than or equal to \p varSrc;
|
|
/// - Zero otherwise.
|
|
///
|
|
bool operator>=(_In_ const VARIANT& varSrc) const noexcept
|
|
{
|
|
return !operator<(varSrc);
|
|
}
|
|
|
|
///
|
|
/// Converts a variant from one type to another.
|
|
///
|
|
/// \sa [VariantChangeType function](https://msdn.microsoft.com/en-us/library/windows/desktop/ms221258.aspx)
|
|
///
|
|
HRESULT change_type(_In_ VARTYPE _vt, _In_opt_ USHORT wFlags = 0) noexcept
|
|
{
|
|
return VariantChangeType(this, this, wFlags, _vt);
|
|
}
|
|
|
|
private:
|
|
/// \cond internal
|
|
HRESULT compare(_In_ const VARIANT &varLeft, _In_ const VARIANT &varRight, _In_ LCID lcid, _In_ ULONG dwFlags) const noexcept
|
|
{
|
|
switch(vt) {
|
|
case VT_I1: return varLeft.cVal == varRight.cVal ? VARCMP_EQ : varLeft.cVal > varRight.cVal ? VARCMP_GT : VARCMP_LT;
|
|
case VT_UI2: return varLeft.uiVal == varRight.uiVal ? VARCMP_EQ : varLeft.uiVal > varRight.uiVal ? VARCMP_GT : VARCMP_LT;
|
|
case VT_UI4: return varLeft.uintVal == varRight.uintVal ? VARCMP_EQ : varLeft.uintVal > varRight.uintVal ? VARCMP_GT : VARCMP_LT;
|
|
case VT_UI8: return varLeft.ullVal == varRight.ullVal ? VARCMP_EQ : varLeft.ullVal > varRight.ullVal ? VARCMP_GT : VARCMP_LT;
|
|
default: return VarCmp(const_cast<LPVARIANT>(&varLeft), const_cast<LPVARIANT>(&varRight), lcid, dwFlags);
|
|
}
|
|
}
|
|
/// \endcond
|
|
};
|
|
#pragma warning(pop)
|
|
|
|
///
|
|
/// Context scope automatic COM (un)initialization
|
|
///
|
|
class com_initializer
|
|
{
|
|
WINSTD_NONCOPYABLE(com_initializer)
|
|
WINSTD_NONMOVABLE(com_initializer)
|
|
|
|
public:
|
|
///
|
|
/// Initializes the COM library on the current thread and identifies the concurrency model as single-thread apartment (STA).
|
|
///
|
|
/// \sa [CoInitialize function](https://msdn.microsoft.com/en-us/library/windows/desktop/ms678543.aspx)
|
|
///
|
|
com_initializer(_In_opt_ LPVOID pvReserved) noexcept
|
|
{
|
|
m_result = CoInitialize(pvReserved);
|
|
}
|
|
|
|
///
|
|
/// Initializes the COM library for use by the calling thread, sets the thread's concurrency model, and creates a new apartment for the thread if one is required.
|
|
///
|
|
/// \sa [CoInitializeEx function](https://msdn.microsoft.com/en-us/library/windows/desktop/ms695279.aspx)
|
|
///
|
|
com_initializer(_In_opt_ LPVOID pvReserved, _In_ DWORD dwCoInit) noexcept
|
|
{
|
|
m_result = CoInitializeEx(pvReserved, dwCoInit);
|
|
}
|
|
|
|
///
|
|
/// Uninitializes COM.
|
|
///
|
|
/// \sa [CoUninitialize function](https://msdn.microsoft.com/en-us/library/windows/desktop/ms688715.aspx)
|
|
///
|
|
virtual ~com_initializer()
|
|
{
|
|
if (SUCCEEDED(m_result))
|
|
CoUninitialize();
|
|
}
|
|
|
|
///
|
|
/// Return result of `CoInitialize()` call.
|
|
///
|
|
/// \sa [CoInitialize function](https://msdn.microsoft.com/en-us/library/windows/desktop/ms678543.aspx)
|
|
///
|
|
HRESULT status() const noexcept
|
|
{
|
|
return m_result;
|
|
}
|
|
|
|
protected:
|
|
HRESULT m_result; ///< Result of CoInitialize call
|
|
};
|
|
|
|
/// @}
|
|
}
|
|
|
|
/// \addtogroup WinStdCOM
|
|
/// @{
|
|
|
|
///
|
|
/// Creates and default-initializes a single object of the class associated with a specified CLSID
|
|
///
|
|
/// \sa [CoCreateInstance function](https://msdn.microsoft.com/en-us/library/windows/desktop/ms686615.aspx)
|
|
///
|
|
template <class T>
|
|
static _Check_return_ HRESULT CoCreateInstance(_In_ REFCLSID rclsid, _In_opt_ LPUNKNOWN pUnkOuter, _In_ DWORD dwClsContext, _Inout_ winstd::com_obj<T> &v)
|
|
{
|
|
T* ppv;
|
|
HRESULT hr = CoCreateInstance(rclsid, pUnkOuter, dwClsContext, __uuidof(T), (LPVOID*)&ppv);
|
|
if (SUCCEEDED(hr))
|
|
v.attach(ppv);
|
|
return hr;
|
|
}
|
|
|
|
/// @}
|