cmp.hpp

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/*****************************************************************************
    
    cmp.hpp -- Comparisions.

    Ýòîò ôàéë ÿâëÿåòñÿ ÷àñòüþ áèáëèîòåêè Arageli.

    Copyright (C) Nikolai Yu. Zolotykh, 1999--2006
    Copyright (C) Sergey S. Lyalin, 2005
    University of Nizhni Novgorod, Russia

*****************************************************************************/

#ifndef _ARAGELI_cmp_hpp_
#define _ARAGELI_cmp_hpp_

#include "config.hpp"
#include "exception.hpp"
#include "factory.hpp"

#include "std_import.hpp"


namespace Arageli
{



template <typename T1, typename T2>
inline int cmp (const T1& a, const T2& b)
{
    if(a < b)return -1;
    else if(a > b)return +1;
    else
    {
        ARAGELI_ASSERT_0(a == b);
        return 0;
    }
}



template <typename T>
inline int sign (const T& x)
{ return cmp(x, null(x)); }


template <typename T>
inline bool is_even (const T& x)
{ return is_null(x & unit(x)); }


template <typename T>
inline bool is_odd (const T& x)
{ return !is_null(x & unit(x)); }


template <typename T1, typename T2>
inline bool is_divisible (const T1& a, const T2& b)
{ return is_null(a%b); }


template <typename T>
inline bool is_positive (const T& x)
{ return x > null(x); }

template <typename T>
inline bool is_negative (const T& x)
{ return x < null(x); }


template <typename T>
inline bool is_integer (const T& x)
{ return is_null(frac(x)); }


} // namespace Arageli


//#ifdef ARAGELI_INCLUDE_CPP_WITH_EXPORT_TEMPLATE
//  #define ARAGELI_INCLUDE_CPP_WITH_EXPORT_TEMPLATE_CMP
//  #include "cmp.cpp"
//  #undef  ARAGELI_INCLUDE_CPP_WITH_EXPORT_TEMPLATE_CMP
//#endif


#endif  //  #ifndef _ARAGELI_cmp_hpp_

---