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// MyCom.h
#ifndef __MYCOM_H
#define __MYCOM_H
#include "MyWindows.h"
#ifndef RINOK
#define RINOK(x) { HRESULT __result_ = (x); if (__result_ != S_OK) return __result_; }
#endif
template <class T>
class CMyComPtr
{
T* _p;
public:
// typedef T _PtrClass;
CMyComPtr() { _p = NULL;}
CMyComPtr(T* p) {if ((_p = p) != NULL) p->AddRef(); }
CMyComPtr(const CMyComPtr<T>& lp)
{
if ((_p = lp._p) != NULL)
_p->AddRef();
}
~CMyComPtr() { if (_p) _p->Release(); }
void Release() { if (_p) { _p->Release(); _p = NULL; } }
operator T*() const { return (T*)_p; }
// T& operator*() const { return *_p; }
T** operator&() { return &_p; }
T* operator->() const { return _p; }
T* operator=(T* p)
{
if (p != 0)
p->AddRef();
if (_p)
_p->Release();
_p = p;
return p;
}
T* operator=(const CMyComPtr<T>& lp) { return (*this = lp._p); }
bool operator!() const { return (_p == NULL); }
// bool operator==(T* pT) const { return _p == pT; }
// Compare two objects for equivalence
void Attach(T* p2)
{
Release();
_p = p2;
}
T* Detach()
{
T* pt = _p;
_p = NULL;
return pt;
}
#ifdef _WIN32
HRESULT CoCreateInstance(REFCLSID rclsid, REFIID iid, LPUNKNOWN pUnkOuter = NULL, DWORD dwClsContext = CLSCTX_ALL)
{
return ::CoCreateInstance(rclsid, pUnkOuter, dwClsContext, iid, (void**)&_p);
}
#endif
/*
HRESULT CoCreateInstance(LPCOLESTR szProgID, LPUNKNOWN pUnkOuter = NULL, DWORD dwClsContext = CLSCTX_ALL)
{
CLSID clsid;
HRESULT hr = CLSIDFromProgID(szProgID, &clsid);
ATLASSERT(_p == NULL);
if (SUCCEEDED(hr))
hr = ::CoCreateInstance(clsid, pUnkOuter, dwClsContext, __uuidof(T), (void**)&_p);
return hr;
}
*/
template <class Q>
HRESULT QueryInterface(REFGUID iid, Q** pp) const
{
return _p->QueryInterface(iid, (void**)pp);
}
};
//////////////////////////////////////////////////////////
inline HRESULT StringToBstr(LPCOLESTR src, BSTR *bstr)
{
*bstr = ::SysAllocString(src);
return (*bstr != 0) ? S_OK : E_OUTOFMEMORY;
}
class CMyComBSTR
{
public:
BSTR m_str;
CMyComBSTR(): m_str(NULL) {}
CMyComBSTR(LPCOLESTR src) { m_str = ::SysAllocString(src); }
// CMyComBSTR(int nSize) { m_str = ::SysAllocStringLen(NULL, nSize); }
// CMyComBSTR(int nSize, LPCOLESTR sz) { m_str = ::SysAllocStringLen(sz, nSize); }
CMyComBSTR(const CMyComBSTR& src) { m_str = src.MyCopy(); }
/*
CMyComBSTR(REFGUID src)
{
LPOLESTR szGuid;
StringFromCLSID(src, &szGuid);
m_str = ::SysAllocString(szGuid);
CoTaskMemFree(szGuid);
}
*/
~CMyComBSTR() { ::SysFreeString(m_str); }
CMyComBSTR& operator=(const CMyComBSTR& src)
{
if (m_str != src.m_str)
{
if (m_str)
::SysFreeString(m_str);
m_str = src.MyCopy();
}
return *this;
}
CMyComBSTR& operator=(LPCOLESTR src)
{
::SysFreeString(m_str);
m_str = ::SysAllocString(src);
return *this;
}
unsigned int Length() const { return ::SysStringLen(m_str); }
operator BSTR() const { return m_str; }
BSTR* operator&() { return &m_str; }
BSTR MyCopy() const
{
int byteLen = ::SysStringByteLen(m_str);
BSTR res = ::SysAllocStringByteLen(NULL, byteLen);
memcpy(res, m_str, byteLen);
return res;
}
/*
void Attach(BSTR src) { m_str = src; }
BSTR Detach()
{
BSTR s = m_str;
m_str = NULL;
return s;
}
*/
void Empty()
{
::SysFreeString(m_str);
m_str = NULL;
}
bool operator!() const { return (m_str == NULL); }
};
//////////////////////////////////////////////////////////
class CMyUnknownImp
{
public:
ULONG __m_RefCount;
CMyUnknownImp(): __m_RefCount(0) {}
};
#define MY_QUERYINTERFACE_BEGIN STDMETHOD(QueryInterface) \
(REFGUID iid, void **outObject) {
#define MY_QUERYINTERFACE_ENTRY(i) if (iid == IID_ ## i) \
{ *outObject = (void *)(i *)this; AddRef(); return S_OK; }
#define MY_QUERYINTERFACE_ENTRY_UNKNOWN(i) if (iid == IID_IUnknown) \
{ *outObject = (void *)(IUnknown *)(i *)this; AddRef(); return S_OK; }
#define MY_QUERYINTERFACE_BEGIN2(i) MY_QUERYINTERFACE_BEGIN \
MY_QUERYINTERFACE_ENTRY_UNKNOWN(i) \
MY_QUERYINTERFACE_ENTRY(i)
#define MY_QUERYINTERFACE_END return E_NOINTERFACE; }
#define MY_ADDREF_RELEASE \
STDMETHOD_(ULONG, AddRef)() { return ++__m_RefCount; } \
STDMETHOD_(ULONG, Release)() { if (--__m_RefCount != 0) \
return __m_RefCount; delete this; return 0; }
#define MY_UNKNOWN_IMP_SPEC(i) \
MY_QUERYINTERFACE_BEGIN \
i \
MY_QUERYINTERFACE_END \
MY_ADDREF_RELEASE
#define MY_UNKNOWN_IMP MY_QUERYINTERFACE_BEGIN \
MY_QUERYINTERFACE_ENTRY_UNKNOWN(IUnknown) \
MY_QUERYINTERFACE_END \
MY_ADDREF_RELEASE
#define MY_UNKNOWN_IMP1(i) MY_UNKNOWN_IMP_SPEC( \
MY_QUERYINTERFACE_ENTRY_UNKNOWN(i) \
MY_QUERYINTERFACE_ENTRY(i) \
)
#define MY_UNKNOWN_IMP2(i1, i2) MY_UNKNOWN_IMP_SPEC( \
MY_QUERYINTERFACE_ENTRY_UNKNOWN(i1) \
MY_QUERYINTERFACE_ENTRY(i1) \
MY_QUERYINTERFACE_ENTRY(i2) \
)
#define MY_UNKNOWN_IMP3(i1, i2, i3) MY_UNKNOWN_IMP_SPEC( \
MY_QUERYINTERFACE_ENTRY_UNKNOWN(i1) \
MY_QUERYINTERFACE_ENTRY(i1) \
MY_QUERYINTERFACE_ENTRY(i2) \
MY_QUERYINTERFACE_ENTRY(i3) \
)
#define MY_UNKNOWN_IMP4(i1, i2, i3, i4) MY_UNKNOWN_IMP_SPEC( \
MY_QUERYINTERFACE_ENTRY_UNKNOWN(i1) \
MY_QUERYINTERFACE_ENTRY(i1) \
MY_QUERYINTERFACE_ENTRY(i2) \
MY_QUERYINTERFACE_ENTRY(i3) \
MY_QUERYINTERFACE_ENTRY(i4) \
)
#define MY_UNKNOWN_IMP5(i1, i2, i3, i4, i5) MY_UNKNOWN_IMP_SPEC( \
MY_QUERYINTERFACE_ENTRY_UNKNOWN(i1) \
MY_QUERYINTERFACE_ENTRY(i1) \
MY_QUERYINTERFACE_ENTRY(i2) \
MY_QUERYINTERFACE_ENTRY(i3) \
MY_QUERYINTERFACE_ENTRY(i4) \
MY_QUERYINTERFACE_ENTRY(i5) \
)
#endif
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