//%2006////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
// Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation, The Open Group.
// Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
// Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; VERITAS Software Corporation; The Open Group.
// Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; Symantec Corporation; The Open Group.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
// ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
// "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
// LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//==============================================================================
//
// Author: Mike Brasher (mbrasher@bmc.com)
//
// Modified By: Roger Kumpf, Hewlett-Packard Company (roger_kumpf@hp.com)
//              Karl Schopmeyer, (k.schopmeyer@opengroup.org)
//              Carol Ann Krug Graves, Hewlett-Packard Company
//                (carolann_graves@hp.com)
//              Amit K Arora, IBM (amita@in.ibm.com)
//              Adriann Schuur (schuur@de.ibm.com) PEP 164
//              Mike Brasher, Inova Europe (mike-brasher@austin.rr.com)
//
//%/////////////////////////////////////////////////////////////////////////////

#ifndef Pegasus_ValueRep_h
#define Pegasus_ValueRep_h

#include <new>
#include "Union.h"
#include "AtomicInt.h"

PEGASUS_NAMESPACE_BEGIN

class PEGASUS_COMMON_LINKAGE CIMValueRep
{
public:

    CIMValueRep();

    CIMValueRep(int*); 

    ~CIMValueRep();

    void release();

    static void ref(const CIMValueRep* rep);

    static void unref(const CIMValueRep* rep);

    AtomicInt refs;
    CIMType type;
    Boolean isArray;
    Boolean isNull;
    Union u;

    static CIMValueRep _emptyRep;
};

inline CIMValueRep::CIMValueRep() : refs(1)
{
} 

inline CIMValueRep::CIMValueRep(int*) :
    refs(2), type(CIMTYPE_BOOLEAN), isArray(false), isNull(true) 
{
    // This constructor is only used by the _emptyRep object.
    memset(&u, 0, sizeof(Union));
}

inline CIMValueRep::~CIMValueRep() 
{
    release();
}

inline void CIMValueRep::ref(const CIMValueRep* rep)
{
    if (rep != &CIMValueRep::_emptyRep)
    {
        ((CIMValueRep*)rep)->refs++;
    }
}

inline void CIMValueRep::unref(const CIMValueRep* rep)
{
    if (rep != &CIMValueRep::_emptyRep && 
	((CIMValueRep*)rep)->refs.decAndTestIfZero())
    {
	delete (CIMValueRep*)rep;
    }
}

//==============================================================================
//
// CIMValueType - template utilities used below.
//
//==============================================================================

// Functions to perform type deduction.
inline CIMType TypeOf(Boolean*) { return CIMTYPE_BOOLEAN; }
inline CIMType TypeOf(Uint8*) { return CIMTYPE_UINT8; }
inline CIMType TypeOf(Sint8*) { return CIMTYPE_SINT8; }
inline CIMType TypeOf(Uint16*) { return CIMTYPE_UINT16; }
inline CIMType TypeOf(Sint16*) { return CIMTYPE_SINT16; }
inline CIMType TypeOf(Uint32*) { return CIMTYPE_UINT32; }
inline CIMType TypeOf(Sint32*) { return CIMTYPE_SINT32; }
inline CIMType TypeOf(Uint64*) { return CIMTYPE_UINT64; }
inline CIMType TypeOf(Sint64*) { return CIMTYPE_SINT64; }
inline CIMType TypeOf(Real32*) { return CIMTYPE_REAL32; }
inline CIMType TypeOf(Real64*) { return CIMTYPE_REAL64; }
inline CIMType TypeOf(Char16*) { return CIMTYPE_CHAR16; }
inline CIMType TypeOf(String*) { return CIMTYPE_STRING; }
inline CIMType TypeOf(CIMDateTime*) { return CIMTYPE_DATETIME; }
inline CIMType TypeOf(CIMObjectPath*) { return CIMTYPE_REFERENCE; }
inline CIMType TypeOf(CIMObject*) { return CIMTYPE_OBJECT; }
#ifdef PEGASUS_EMBEDDED_INSTANCE_SUPPORT
inline CIMType TypeOf(CIMInstance*) { return CIMTYPE_INSTANCE; }
#endif // PEGASUS_EMBEDDED_INSTANCE_SUPPORT

inline bool IsRaw(Boolean*) { return true; }
inline bool IsRaw(Uint8*) { return true; }
inline bool IsRaw(Sint8*) { return true; }
inline bool IsRaw(Uint16*) { return true; }
inline bool IsRaw(Sint16*) { return true; }
inline bool IsRaw(Uint32*) { return true; }
inline bool IsRaw(Sint32*) { return true; }
inline bool IsRaw(Uint64*) { return true; }
inline bool IsRaw(Sint64*) { return true; }
inline bool IsRaw(Real32*) { return true; }
inline bool IsRaw(Real64*) { return true; }
inline bool IsRaw(Char16*) { return true; }
inline bool IsRaw(String*) { return false; }
inline bool IsRaw(CIMDateTime*) { return false; }
inline bool IsRaw(CIMObjectPath*) { return false; }
inline bool IsRaw(CIMObject*) { return false; }
#ifdef PEGASUS_EMBEDDED_INSTANCE_SUPPORT
inline bool IsRaw(CIMInstance*) { return false; }
#endif // PEGASUS_EMBEDDED_INSTANCE_SUPPORT

template<class T>
struct CIMValueType
{
public:

    static T* ptr(const CIMValueRep* rep)
    {
	return (T*)(&rep->u);
    }

    static T& ref(const CIMValueRep* rep)
    {
	return *((T*)((void*)&rep->u));
    }

    static Array<T>* aptr(const CIMValueRep* rep)
    {
	return (Array<T>*)(&rep->u);
    }

    static Array<T>& aref(const CIMValueRep* rep)
    {
	return *((Array<T>*)((void*)&rep->u));
    }

    static void defaultConstruct(CIMValueRep* rep)
    {
	if (IsRaw((T*)0))
	    rep->u._uint64Value = (Uint64)0;
	else
	    new((T*)((void*)&rep->u)) T();
    }

    static void copyConstruct(CIMValueRep* rep, const T& x)
    {
	new((T*)((void*)&rep->u)) T(x);
    }

    static void copyConstructArray(CIMValueRep* rep, const Array<T>& x)
    {
	new((Array<T>*)((void*)&rep->u)) Array<T>(x);
    }

    static void constructArrayWithSize(CIMValueRep* rep, Uint32 arraySize)
    {
	new((Array<T>*)((void*)&rep->u)) Array<T>(arraySize);
    }

    static void destruct(CIMValueRep* rep)
    {
	((T*)((void*)&rep->u))->~T();
    }

    static void destructArray(CIMValueRep* rep)
    {
	((Array<T>*)((void*)&rep->u))->~Array<T>();
    }

    static void setNull(
	CIMValueRep* rep, CIMType type_, bool isArray_, Uint32 arraySize_)
    {
	rep->type = type_;
	rep->isArray = isArray_;
	rep->isNull = true;

	if (isArray_)
	    constructArrayWithSize(rep, arraySize_);
	else
	    defaultConstruct(rep);
    }

    static void set(CIMValueRep* rep, const T& x)
    {
	rep->type = TypeOf((T*)0);
	rep->isArray = false;
	rep->isNull = false;
	copyConstruct(rep, x);
    }

    static void setArray(CIMValueRep* rep, const Array<T>& x)
    {
	rep->type = TypeOf((T*)0);
	rep->isArray = true;
	rep->isNull = false;
	copyConstructArray(rep, x);
    }

    static Uint32 arraySize(CIMValueRep* rep)
    {
	return aref(rep).size();
    }

    static bool equal(const CIMValueRep* r1, const CIMValueRep* r2)
    {
	return ref(r1) == ref(r2);
    }

    static bool equalArray(const CIMValueRep* r1, const CIMValueRep* r2)
    {
	return aref(r1) == aref(r2);
    }
};

PEGASUS_NAMESPACE_END

#endif /* Pegasus_ValueRep_h */