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//
// /home/ms/sources/sidplay/libsidplay/include/RCS/smart.h,v
//
#ifndef SMART_H
#define SMART_H
#include <iostream.h>
#include <iomanip.h>
#include <ctype.h>
#include "mytypes.h"
template <class T>
class smartPtrBase
{
public: // ----------------------------------------------------------------
// --- constructors ---
smartPtrBase(T* pBuffer, udword bufferLen, bool bufOwner = false) : dummy(0)
{
doFree = bufOwner;
if ( bufferLen >= 1 )
{
pBufCurrent = ( pBufBegin = pBuffer );
pBufEnd = pBufBegin + bufferLen;
bufLen = bufferLen;
status = true;
}
else
{
pBufCurrent = ( pBufBegin = ( pBufEnd = 0 ));
bufLen = 0;
status = false;
}
}
// --- destructor ---
virtual ~smartPtrBase()
{
if ( doFree && (pBufBegin != 0) )
{
delete[] pBufBegin;
}
}
// --- public member functions ---
virtual T* tellBegin() { return pBufBegin; }
virtual udword tellLength() { return bufLen; }
virtual udword tellPos() { return (udword)(pBufCurrent-pBufBegin); }
virtual bool reset()
{
if ( bufLen >= 1 )
{
pBufCurrent = pBufBegin;
return (status = true);
}
else
{
return (status = false);
}
}
virtual bool good()
{
if ( pBufCurrent < pBufEnd )
return true;
else
return false;
}
virtual bool fail()
{
if ( pBufCurrent == pBufEnd )
return true;
else
return false;
}
virtual void operator ++()
{
if ( status && !fail() )
{
pBufCurrent++;
}
else
{
status = false;
}
}
virtual void operator ++(int)
{
if ( status && !fail() )
{
pBufCurrent++;
}
else
{
status = false;
}
}
virtual void operator --()
{
if ( status && (pBufCurrent > pBufBegin) )
{
pBufCurrent--;
}
else
{
status = false;
}
}
virtual void operator --(int)
{
if ( status && (pBufCurrent > pBufBegin) )
{
pBufCurrent--;
}
else
{
status = false;
}
}
virtual void operator +=(udword offset)
{
if ( status && ((pBufCurrent + offset) < pBufEnd) )
{
pBufCurrent += offset;
}
else
{
status = false;
}
}
virtual void operator -=(udword offset)
{
if ( status && ((pBufCurrent - offset) >= pBufBegin) )
{
pBufCurrent -= offset;
}
else
{
status = false;
}
}
T operator*()
{
if ( status && good() )
{
return *pBufCurrent;
}
else
{
status = false;
return dummy;
}
}
T& operator [](udword index)
{
if ( status && ((pBufCurrent + index) < pBufEnd) )
{
return pBufCurrent[index];
}
else
{
status = false;
return dummy;
}
}
virtual operator bool() { return status; }
protected: // -------------------------------------------------------------
T* pBufBegin;
T* pBufEnd;
T* pBufCurrent;
udword bufLen;
bool status;
bool doFree;
T dummy;
};
template <class T>
class smartPtr : public smartPtrBase<T>
{
public: // ----------------------------------------------------------------
// --- constructors ---
smartPtr(T* pBuffer, udword bufferLen, bool bufOwner = false) : smartPtrBase<T>(pBuffer, bufferLen, bufOwner)
{
}
};
#endif
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