home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
C Programming Starter Kit 2.0
/
SamsPublishing-CProgrammingStarterKit-v2.0-Win31.iso
/
bc45
/
ocfinc.pak
/
OLEUTIL.H
< prev
Wrap
C/C++ Source or Header
|
1997-07-23
|
16KB
|
448 lines
//
//----------------------------------------------------------------------------
// ObjectComponents
// (C) Copyright 1994 by Borland International, All Rights Reserved
//
// Low level OLE Utility class definitions
//----------------------------------------------------------------------------
#if !defined(OCF_OLEUTIL_H)
#define OCF_OLEUTIL_H
#if !defined(OSL_DEFS_H)
# include <osl/defs.h>
#endif
#if !defined(__CSTRING_H)
# include <cstring.h>
#endif
#if !defined(OSL_EXCEPT_H)
# include <osl/except.h>
#endif
// For 16bit Ole2, can grab the headers now if the're not included already,
// For 32bit Ole2, it is too late
//
#if defined(BI_PLAT_WIN16)
# if !defined(__OLE2_H)
# include <ole2.h>
# endif
# if !defined(__DISPATCH_H)
# include <dispatch.h>
# endif
# if !defined(__OLENLS_H)
# include <olenls.h>
# endif
#endif
#if defined(BI_PLAT_WIN32) && !defined(__OLE2_H) && !defined(_OLE2_H_)
# error INC_OLE2 must be defined before osl/defs.h is included. Include ocdefs.h first
#endif
// Force this pointers and vtable pointers far on interfaces
//
#if !defined(_ICLASS)
# if defined(__BORLANDC__)
# if defined(BI_PLAT_WIN16)
# define _ICLASS __huge
# else
# define _ICLASS
# endif
# else
# define _ICLASS FAR
# endif
#endif
#define _IFUNC STDMETHODCALLTYPE
class TRegList;
//____________________________________________________________________________
//
// TXOle - OLE API related exception object
//____________________________________________________________________________
class TXOle : public TXBase {
public:
TXOle(const string& msg, HRESULT stat);
TXOle(const TXOle& src);
~TXOle();
TXOle* Clone();
void Throw();
static void Check(HRESULT stat, const char far* msg);
static void Check(HRESULT stat);
static void Throw(HRESULT stat, const char far* msg);
static void OleErrorFromCode(HRESULT stat, char far* buffer, int size);
const long Stat;
};
inline TXOle::TXOle(const string& msg, HRESULT stat)
: TXBase(msg), Stat((long)stat) {}
inline TXOle::TXOle(const TXOle& src)
: TXBase(src), Stat(src.Stat) {}
#if (__DEBUG > 0) || defined(__WARN)
# define OLECALL(func, msg) TXOle::Check(func, msg)
#else
# define OLECALL(func, msg) TXOle::Check(func)
#endif
//____________________________________________________________________________
//
// TComRef - encapsulation of OLE interface pointers
//____________________________________________________________________________
template<class T> class TComRefBase {
public:
operator T far*() {return I;}
operator T far* far*() {TComRefBase::~TComRefBase(); return &I;}
int operator !() {return I==0;}
void operator delete(void* p) {((TComRefBase<T> far*)p)->I=0;}
protected:
TComRefBase(const TComRefBase<T>& i) : I(i.I) {I->AddRef();}
TComRefBase(T far* i) : I(i) {}
TComRefBase() : I(0) {}
~TComRefBase() {if (I) I->Release(); I = 0;}
T* I;
private:
void* operator new(size_t) {return 0;} // prohibit use of new
};
template<class T> class TComRef : public TComRefBase<T> {
public:
TComRef() : TComRefBase<T>() {}
TComRef(T far* iface) : TComRefBase<T>(iface) {}
TComRef(const TComRef<T>& i) : TComRefBase<T>(i) {}
T far* operator =(T far* iface) {if(I)I->Release(); return I = iface;}
T far* operator =(const TComRef<T>& i) {if(I)I->Release(); return I=i.I;}
T far* operator->() {return I;} // should throw exception if I==0
};
//____________________________________________________________________________
//
// TBSTR - BASIC global string encapsulation
//____________________________________________________________________________
class TBSTR {
public:
TBSTR() : P(0) {}
TBSTR(BSTR p) : P(p) {}
~TBSTR() {::SysFreeString(P);}
BSTR operator =(BSTR p) {if(P)::SysFreeString(P); return P = p;}
TBSTR& operator =(const TBSTR& p){if(P)::SysFreeString(P);P=p.P;return *this;}
operator BSTR() {return P;}
operator BSTR far*() {if(P)::SysFreeString(P); return &P;}
int operator !() {return P==0;}
void operator ~() {if (P)::SysFreeString(P); P = 0;}
protected:
BSTR P;
private:
void* operator new(size_t) {return 0;} // prohibit use of new, delete, etc
void operator delete(void*) {}
};
//____________________________________________________________________________
//
// TOleAllocator - object to initialize OLE and access memory manager
//____________________________________________________________________________
class TOleAllocator {
public:
TOleAllocator(); // gets allocator, does not initialize OLE
TOleAllocator(IMalloc* mem);// use 0 to initialize with OLE task allocator
~TOleAllocator();
void far* Alloc(unsigned long size);
void Free(void far* pv);
IMalloc* Mem;
private:
bool Initialized;
};
inline
TOleAllocator::TOleAllocator(IMalloc* mem) : Initialized(true)
{
OLECALL(OleInitialize(mem), "OleInitialize");
OLECALL(CoGetMalloc(MEMCTX_TASK, &Mem), "CoGetMalloc");
}
inline
TOleAllocator::TOleAllocator() : Initialized(false)
{
OLECALL(CoGetMalloc(MEMCTX_TASK, &Mem), "CoGetMalloc");
}
inline
TOleAllocator::~TOleAllocator()
{
if (Mem)
Mem->Release();
if (Initialized)
::OleUninitialize();
}
inline void
TOleAllocator::Free(void far* pv)
{
Mem->Free(pv);
}
//____________________________________________________________________________
//
// TClassId - GUID/IID/CLSID management
//____________________________________________________________________________
class far TClassId {
public:
enum TGenerate {Generate};
TClassId(const GUID far& guid);
TClassId(const char far* idtxt);
TClassId(const TClassId& copy);
TClassId(TGenerate);
TClassId & operator =(const TClassId& copy);
TClassId(const GUID far& guid, int offset);
~TClassId();
operator GUID&();
operator const char*();
protected:
TClassId();
GUID Guid;
const char* Text;
};
inline TClassId::TClassId(const GUID far& guid) : Text(0) { Guid = guid; }
inline TClassId::TClassId(const TClassId& copy) : Guid(copy.Guid), Text(0) {}
inline TClassId::TClassId() : Text(0) {} // Guid must be set by derived class
inline TClassId::operator GUID&() { return Guid; }
inline TClassId& TClassId::operator =(const TClassId& copy)
{Guid = copy.Guid; Text=0; return *this;}
class TBaseClassId : public TClassId {
public:
TBaseClassId(TRegList& regInfo, int maxAlloc = 256);
TBaseClassId(const GUID far& guid, int maxAlloc = 256);
TBaseClassId(const char far* idtxt, int maxAlloc = 256);
TBaseClassId(TGenerate, int maxAlloc = 256);
TClassId operator [](int offset);
int AllocId();
int GetOffset(const GUID far& guid); // returns -1 if not within range
private:
int Offset; // last offset given out by AllocId(), creator reserves 0
int MaxAlloc;
};
//____________________________________________________________________________
//
// Fast GUID compare functions, assume that low word has already matched OK
//____________________________________________________________________________
void CmpGuid12(IUnknown* This, REFIID req, REFIID ref, void far*far* pif);
void CmpGuidOle(IUnknown* This, REFIID req, void far*far* pif);
//____________________________________________________________________________
//
// TUnknown - Standard implementation of a controlling IUnknown for an object,
// to be inherited with other COM interfaces into an implementation
// class whose IUnknown implementation delegates to TUnknown::Outer.
//____________________________________________________________________________
class _ICLASS TUnknown {
public:
operator IUnknown&() {return *Outer;}
operator IUnknown*() {Outer->AddRef(); return Outer;}
IUnknown* SetOuter(IUnknown* outer = 0);
IUnknown* GetOuter() {return Outer;}
unsigned long GetRefCount();
unsigned long AdjustRefCount(int i);
IUnknown& Aggregate(TUnknown& inner); // returns outermost IUnknown
protected:
IUnknown& ThisUnknown() {return I;}
IUnknown* Outer;
TUnknown();
virtual ~TUnknown();
virtual HRESULT QueryObject(const GUID far& iid, void far* far* pif);
private:
class _ICLASS TUnknownI : public IUnknown {
public:
HRESULT _IFUNC QueryInterface(const GUID far& iid, void far*far* pif);
unsigned long _IFUNC AddRef();
unsigned long _IFUNC Release();
TUnknownI() : RefCnt(0), Inner(0) {}
~TUnknownI();
unsigned RefCnt; // object's reference count, remains 1 if aggregated
TUnknown* Inner; // chain of TUnknown-aggregated objects
private:
TUnknown& Host();
} I;
friend class TUnknownI;
};
inline IUnknown* TUnknown::SetOuter(IUnknown* outer)
{
if (outer) {
Outer = outer;
if (I.Inner)
I.Inner->SetOuter(outer);
}
return &I;
}
inline TUnknown& TUnknown::TUnknownI::Host()
{
return *(TUnknown*)((char*)this-(int)(&((TUnknown*)0)->I));
}
inline unsigned long TUnknown::AdjustRefCount(int i)
{
return (unsigned long)(I.RefCnt += i);
}
//____________________________________________________________________________
//
// Macros to generate COM mixin classes for use with TUnknown
// Each base class must have an inline QueryInterface wrapper defined.
//
// DECLARE_COMBASES1(classname, base) // declares support for 1 interface
// DECLARE_COMBASES2(classname, base, base) // mixes in for 2 interfaces
// .......
// DEFINE_COMBASES1(classname, base) // implements IUnknown for 1 interface
// DEFINE_COMBASES2(classname, base, base) // implements for 2 interfaces
// ......
//
// Macros to generate inline QueryInterface wrappers for interfaces/delegates
// (low GUID word may specify an explicit integer or an IID_whatever.Data1)
// For efficiency they are void functions; check result pointer for success
//
// DEFINE_QI_BASE(cls, low) // Inherited COM interface with IUnknown base
// DEFINE_QI_OLEBASE(cls, low) // Inherited OLE interface using an OLE GUID
// DEFINE_QI_DERIVED(cls, base, low) // COM interface derived from another
// DEFINE_QI_OLEDERIVED(cls, base, low) // OLE interface derived from another
// DEFINE_QI_DELEGATE(cls, member) // Inherited object with COM member
// DEFINE_QI_DELEGATE_TEST(cls, member) // Object whose COM member may be 0
// DEFINE_QI_MEMBER(name, member) // Used inside object with COM member
// DEFINE_QI_MEMBER_TEST(name, member) // Where object's COM member may be 0
//
// Macro to invoke inline QueryInterface wrappers and return if successful
// A list of these is generated by the DEFINE_COMBASESn(...) macro
//
// COMBASEQUERY(name) // Calls name_QueryInterface(), returns OK if success
//
// Macro to provide standard IUnknown implementation which forwards to Outer
// This macro is automatically invoked by the DEFINE_COMBASESn(...) macro
//
// IUNKNOWN_FORWARD(cls, outer) // cls IUnknown implementation forwards to outer
//
// Example of user-written COM class inheriting from macro-generated mixin
//
// class TSample : public classname {
// public:
// TSample(IUnknown* outer, IUnknown*far* pif) { *pif = SetOuter(outer); }
// };
//____________________________________________________________________________
#define COMBASES_D(cls, bases) \
class cls : public TUnknown, bases { \
protected: \
virtual HRESULT _IFUNC QueryInterface(const GUID far& iid, void far*far* pif); \
virtual unsigned long _IFUNC AddRef(); \
virtual unsigned long _IFUNC Release(); \
virtual HRESULT QueryObject(const GUID far& iid, void far*far* pif); \
HRESULT QueryBases(const GUID far& iid, void far*far* pif) \
{return cls::QueryObject(iid, pif);} \
}; // QueryBases() is an inline wrapper to this QueryObject() implementation
#define COMQRY1BASES(i1) protected i1
#define COMQRY2BASES(i1,i2) protected i1, COMQRY1BASES(i2)
#define COMQRY3BASES(i1,i2,i3) protected i1, COMQRY2BASES(i2,i3)
#define COMQRY4BASES(i1,i2,i3,i4) protected i1, COMQRY3BASES(i2,i3,i4)
#define COMQRY5BASES(i1,i2,i3,i4,i5) protected i1, COMQRY4BASES(i2,i3,i4,i5)
#define DECLARE_COMBASES1(cls,i1) \
COMBASES_D(cls,COMQRY1BASES(i1))
#define DECLARE_COMBASES2(cls,i1,i2) \
COMBASES_D(cls,COMQRY2BASES(i1,i2))
#define DECLARE_COMBASES3(cls,i1,i2,i3) \
COMBASES_D(cls,COMQRY3BASES(i1,i2,i3))
#define DECLARE_COMBASES4(cls,i1,i2,i3,i4) \
COMBASES_D(cls,COMQRY4BASES(i1,i2,i3,i4))
#define DECLARE_COMBASES5(cls,i1,i2,i3,i4,i5) \
COMBASES_D(cls,COMQRY5BASES(i1,i2,i3,i4,i5))
#define IUNKNOWN_FORWARD(cls, outer) \
HRESULT _IFUNC cls::QueryInterface(const GUID far& iid, void far* far* pif)\
{ return outer->QueryInterface(iid, pif); } \
unsigned long _IFUNC cls::AddRef() { return outer->AddRef(); } \
unsigned long _IFUNC cls::Release() { return outer->Release(); }
#define COMBASES_I(cls, tests) \
IUNKNOWN_FORWARD(cls, Outer) \
HRESULT cls::QueryObject(const GUID far& iid, void far*far* pif) \
{ *pif = 0; tests return ResultFromScode(E_NOINTERFACE); }
#define COMBASEQUERY(cls) \
cls##_QueryInterface(this,iid,pif); if(*pif) return NOERROR;
#define COMQRY1TEST(i1) COMBASEQUERY(i1)
#define COMQRY2TEST(i1,i2) COMBASEQUERY(i1) COMQRY1TEST(i2)
#define COMQRY3TEST(i1,i2,i3) COMBASEQUERY(i1) COMQRY2TEST(i2,i3)
#define COMQRY4TEST(i1,i2,i3,i4) COMBASEQUERY(i1) COMQRY3TEST(i2,i3,i4)
#define COMQRY5TEST(i1,i2,i3,i4,i5) COMBASEQUERY(i1) COMQRY3TEST(i2,i3,i4,i5)
#define DEFINE_COMBASES1(cls,i1) \
COMBASES_I(cls,COMQRY1TEST(i1))
#define DEFINE_COMBASES2(cls,i1,i2) \
COMBASES_I(cls,COMQRY2TEST(i1,i2))
#define DEFINE_COMBASES3(cls,i1,i2,i3) \
COMBASES_I(cls,COMQRY3TEST(i1,i2,i3))
#define DEFINE_COMBASES4(cls,i1,i2,i3,i4) \
COMBASES_I(cls,COMQRY4TEST(i1,i2,i3,i4))
#define DEFINE_COMBASES5(cls,i1,i2,i3,i4,i5) \
COMBASES_I(cls,COMQRY5TEST(i1,i2,i3,i4,i5))
#define DEFINE_QI_BASE(cls, low) \
inline void cls##_QueryInterface(cls* obj, REFIID iid, void FAR* FAR* pif) \
{if (iid.Data1==low) CmpGuid12(obj, iid, IID_##cls, pif);}
#define DEFINE_QI_OLEBASE(cls, low) \
inline void cls##_QueryInterface(cls* obj, REFIID iid, void FAR* FAR* pif) \
{if (iid.Data1==low) CmpGuidOle(obj, iid, pif);}
#define DEFINE_QI_DERIVED(cls, base, low) \
inline void cls##_QueryInterface(cls* obj, REFIID iid, void FAR* FAR* pif) \
{if (iid.Data1==low) CmpGuid12(obj, iid, IID_##cls, pif); \
else base##_QueryInterface(obj, iid, pif);}
#define DEFINE_QI_OLEDERIVED(cls, base, low) \
inline void cls##_QueryInterface(cls* obj, REFIID iid, void FAR* FAR* pif) \
{if (iid.Data1==low) CmpGuidOle(obj, iid, pif); \
else base##_QueryInterface(obj, iid, pif);}
#define DEFINE_QI_DELEGATE(cls, member) \
inline void cls##_QueryInterface(cls* obj, REFIID iid, void FAR* FAR* pif) \
{obj->member->QueryInterface(iid, pif);}
#define DEFINE_QI_DELEGATE_TEST(cls, member) \
inline void cls##_QueryInterface(cls* obj, REFIID iid, void FAR* FAR* pif) \
{if (obj->member) obj->member->QueryInterface(iid, pif);}
#define DEFINE_QI_MEMBER(name, member) \
void name##_QueryInterface(void far*, REFIID iid, void FAR* FAR* pif) \
{member->QueryInterface(iid, pif);}
#define DEFINE_QI_MEMBER_TEST(name, member) \
void name##_QueryInterface(void far*, REFIID iid, void FAR* FAR* pif) \
{if (member) member->QueryInterface(iid, pif);}
#define DEFINE_COMBASE_DELEGATE(cls, ifc, member) \
struct _ICLASS cls { \
cls() : member(0) {} \
ifc* member; \
DEFINE_QI_MEMBER_TEST(cls, member) \
};
#endif // OCF_OLEUTIL_H