undefval.h

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#pragma once
/*+
________________________________________________________________________
 
 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        A.H. Lammertink
 Date:          13/01/2005
 RCS:           $Id$
________________________________________________________________________
 
-*/
 
#include "basicmod.h"
#include "commondefs.h"
#include "plftypes.h"
 
#define __mUndefDValue            1e30
#define __mUndefFValue            1e30f
#define __mIsUndefinedD(x)         (((x)>9.99999e29)&&((x)<1.00001e30))
#define __mIsUndefinedF(x)         (((x)>9.99999e29f)&&((x)<1.00001e30f))
#define __mIsUndefinedI(x,udfval)  (((x)>=udfval)||((x)<=-udfval))
#define __mUndefIntVal            2109876543
#define __mUndefIntVal64          9223344556677889900LL
 
 
namespace Values
{
 
template<class T>
mClass(Basic) Undef
{
public:
    static T            val();
    static bool         hasUdf();
    static bool         isUdf(T);
    void                setUdf(T&);
};
 
 
template<>
mClass(Basic) Undef<od_int16>
{
public:
    static od_int16     val()                   { return 32766; }
    static bool         hasUdf()                { return false; }
    static bool         isUdf( od_int16 i )     { return i == 32766; }
    static void         setUdf( od_int16& i )   { i = 32766; }
};
 
 
template<>
mClass(Basic) Undef<od_uint16>
{
public:
    static od_uint16    val()                   { return 65534; }
    static bool         hasUdf()                { return false; }
    static bool         isUdf( od_uint16 i )    { return i == 65534; }
    static void         setUdf( od_uint16& i )  { i = 65534; }
};
 
 
template<>
mClass(Basic) Undef<od_int32>
{
public:
    static od_int32     val()                   { return __mUndefIntVal; }
    static bool         hasUdf()                { return true; }
    static bool         isUdf( od_int32 i )
                        { return i>=__mUndefIntVal || i<=-__mUndefIntVal; }
    static void         setUdf( od_int32& i )   { i = __mUndefIntVal; }
};
 
 
template<>
mClass(Basic) Undef<od_uint32>
{
public:
    static od_uint32    val()                   { return __mUndefIntVal; }
    static bool         hasUdf()                { return true; }
    static bool         isUdf( od_uint32 i )    { return i >= __mUndefIntVal; }
    static void         setUdf( od_uint32& i )  { i = __mUndefIntVal; }
};
 
 
template<>
mClass(Basic) Undef<od_int64>
{
public:
    static od_int64     val()                   { return __mUndefIntVal64; }
    static bool         hasUdf()                { return true; }
    static bool         isUdf( od_int64 i )
                        { return i>=__mUndefIntVal64 || i<=-__mUndefIntVal64; }
    static void         setUdf( od_int64& i )   { i = __mUndefIntVal64; }
};
 
 
template<>
mClass(Basic) Undef<od_uint64>
{
public:
    static od_uint64    val()                   { return __mUndefIntVal64; }
    static bool         hasUdf()                { return true; }
    static bool         isUdf( od_uint64 i )    { return i >= __mUndefIntVal64;}
    static void         setUdf( od_uint64& i )  { i = __mUndefIntVal64; }
};
 
 
template<>
mClass(Basic) Undef<bool>
{
public:
    static bool         val()                   { return false; }
    static bool         hasUdf()                { return false; }
    static bool         isUdf( bool )           { return false; }
    static void         setUdf( bool& b )       { b = false; }
};
 
 
template<>
mClass(Basic) Undef<float>
{
public:
    static float        val()                   { return __mUndefFValue; }
    static bool         hasUdf()                { return true; }
    static bool         isUdf( float f )        { return __mIsUndefinedF(f); }
    static void         setUdf( float& f )      { f = __mUndefFValue; }
};
 
 
template<>
mClass(Basic) Undef<double>
{
public:
    static double       val()                   { return __mUndefDValue; }
    static bool         hasUdf()                { return true; }
    static bool         isUdf( double d )       { return __mIsUndefinedD(d); }
    static void         setUdf( double& d )     { d = __mUndefDValue; }
};
 
 
template<>
mClass(Basic) Undef<const char*>
{
public:
    static const char*  val()                   { return ""; }
    static bool         hasUdf()                { return true; }
    static bool         isUdf( const char* s )  { return !s || !*s; }
    static void         setUdf( const char*& )  {}
};
 
 
template<>
mClass(Basic) Undef<char*>
{
public:
    static const char*  val()                   { return ""; }
    static bool         hasUdf()                { return true; }
    static bool         isUdf( const char* s )  { return !s || !*s; }
    static void         setUdf( char*& s )      { if ( s ) *s = '\0'; }
};
 
 
template<>
mClass(Basic) Undef<char>
{
public:
    static char         val()                   { return -127; }
    static bool         hasUdf()                { return true; }
    static bool         isUdf( const char s )   { return s==-127; }
    static void         setUdf( char& s )       { s = -127; }
};
 
 
 
template <class T> inline
bool isUdf( const T& t )
{
    return Undef<T>::isUdf(t);
}
 
template <class T> inline
const T& udfVal( const T& )
{
    mDefineStaticLocalObject( T, u, = Undef<T>::val() );
    return u;
}
 
template <class T> inline
bool hasUdf()
{
    return Undef<T>::hasUdf();
}
 
template <class T> inline
T& setUdf( T& u )
{
    Undef<T>::setUdf( u );
    return u;
}
 
}
 
 
#define mUdf(type) Values::Undef<type>::val()
#define mSetUdf(val) Values::setUdf(val)
 
 
 
template <class T>
inline bool isUdfImpl( T val )
    { return Values::isUdf( val ); }
 
mGlobal(Basic) bool isUdfImpl(float);
mGlobal(Basic) bool isUdfImpl(double);
 
 
# define mIsUdf(val) isUdfImpl(val)
 
 
#define mFastMaxReasonableFloat 1e20f
#define mFastIsFloatDefined(fval) \
    ( (fval>-mFastMaxReasonableFloat && fval<mFastMaxReasonableFloat) || \
      (!__mIsUndefinedF(fval) && Math::IsNormalNumber(fval)) )