Plex.hpp

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/*********************************************************************
*      This file is part of the source code of BORDERBASIX software. *
*      (C) B. Mourrain,  INRIA                                       *
**********************************************************************
History: 
$Id: Plex.hpp,v 1.1.1.1 2006/10/06 08:01:40 trebuche Exp $
**********************************************************************/
#ifndef _Plex_H_
#define _Plex_H_

template <class M> struct Plex 
{
   static bool less (const M &, const M &);
   bool operator() (const M &, const M &);
};
 
template <class M>
inline bool Plex<M>::less(const M & m1, const M & m2) {
   int n1 = m1.Lvar(), n2 =m2.Lvar();
   int i = std::max(n1,n2);
    
   if(n1 <0 && n2>0) return true;
   if(n2 <0 && n1>0) return false;

   while( m1.GetDegree(i) == m2.GetDegree(i) && i>=0) i--;
   if(i <0) 
     return false;     
   else 
     return (m1.GetDegree(i)< m2.GetDegree(i));
}

template <class M>
bool Plex<M>::operator()(const M & m1, const M & m2) {
    return less(m1,m2);
}

#endif // //_Plex_H_