CACFData.h

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#if !defined(__CACFData_h__)
#define __CACFData_h__

//=============================================================================
//  Includes
//=============================================================================

#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
    #include <CoreAudio/CoreAudioTypes.h>
    #include <CoreFoundation/CFData.h>
#else
    #include <CoreAudioTypes.h>
    #include <CFData.h>
#endif

#include "CADebugMacros.h"

//=============================================================================
//  CACFData
//=============================================================================

class CACFData
{

//  Construction/Destruction
public:
                CACFData(CFDataRef inCFData, bool inWillRelease = true) : mCFData(inCFData), mWillRelease(inWillRelease) {}
                CACFData(const void* inData, UInt32 inDataSize) : mCFData(NULL), mWillRelease(true) { mCFData = CFDataCreate(NULL, static_cast<const UInt8*>(inData), inDataSize); }
                ~CACFData() { Release(); }
                CACFData(const CACFData& inNumber) : mCFData(inNumber.mCFData), mWillRelease(inNumber.mWillRelease) { Retain(); }
    CACFData&   operator=(const CACFData& inNumber) { Release(); mCFData = inNumber.mCFData; mWillRelease = inNumber.mWillRelease; Retain(); return *this; }
    CACFData&   operator=(CFDataRef inCFData) { Release(); mCFData = inCFData; mWillRelease = true; return *this; }

private:
    void        Retain() { if(mWillRelease && (mCFData != NULL)) { CFRetain(mCFData); } }
    void        Release() { if(mWillRelease && (mCFData != NULL)) { CFRelease(mCFData); } }
    
    CFDataRef   mCFData;
    bool        mWillRelease;

//  Operations
public:
    void        AllowRelease() { mWillRelease = true; }
    void        DontAllowRelease() { mWillRelease = false; }
    bool        IsValid() { return mCFData != NULL; }

//  Value Access
public:
    CFDataRef   GetCFData() const { return mCFData; }
    CFDataRef   CopyCFData() const { if(mCFData != NULL) { CFRetain(mCFData); } return mCFData; }
    
    UInt32      GetSize() const { return ToUInt32(CFDataGetLength(mCFData)); }
    const void* GetDataPtr() const { return CFDataGetBytePtr(mCFData); }
    void        CopyData(UInt32 inStartOffset, void* outData, UInt32 inDataSize) const { CFRange theRange = { inStartOffset, inDataSize }; CFDataGetBytes(mCFData, theRange, static_cast<UInt8*>(outData)); }
    
    SInt32      GetSInt32() const { SInt32 theAnswer = 0; CopyData(0, &theAnswer, SizeOf32(SInt32)); return theAnswer; }
    Float32     GetFloat32() const { Float32 theAnswer = 0; CopyData(0, &theAnswer, SizeOf32(Float32)); return theAnswer; }

};

#endif