typeSignature.hpp

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/************************************************************************
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#ifndef _Wolframe_TYPE_SIGNATURE_HPP_INCLUDED
#define _Wolframe_TYPE_SIGNATURE_HPP_INCLUDED

#include <cstddef>
#include <cstring>
#include <stdexcept>

namespace _Wolframe {
namespace utils {

#undef _Wolframe_LOWLEVEL_DEBUG
#ifdef _Wolframe_LOWLEVEL_DEBUG
class TypeSignature
{
        static unsigned int getStmp( unsigned int objid_) {return 2654435761U*(objid_+123);}
public:
        TypeSignature( const char* objname_, unsigned int objid_)
                :m_objid(objid_)
                ,m_objinvid(getStmp(objid_))
        {
                unsigned int nn = std::strlen( objname_);
                if (nn >= objnamesize) nn = objnamesize-1;
                std::memset( m_objname, (char)m_objid, objnamesize);
                std::memcpy( m_objname, objname_, nn);
                m_objname[nn] = 0;
                m_chk = chk();
        }

        virtual ~TypeSignature()
        {
                verify();
        }

        void operator=( const TypeSignature& o)
        {
                m_objid = o.m_objid;
                m_objinvid = o.m_objinvid;
        }

private:
        void verify() const;

        unsigned int chk() const
        {
                unsigned int xx = 123,ii=0;
                for (; ii<objnamesize; ++ii) xx += (m_objname[ii]+ii) * 123;
                return xx;
        }

private:
        enum {objnamesize=32};
        unsigned int m_objid;
        unsigned int m_chk;
        char m_objname[objnamesize];
        unsigned int m_objinvid;
};

#else
class TypeSignature
{
public:
        TypeSignature( const char*, unsigned int) {}
        virtual ~TypeSignature(){}
};

}}//namespace
#endif
#endif