Range.cc

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#include <iostream>
//#include "zypp/base/Logger.h"

#include "zypp/Range.h"

using std::endl;

namespace zypp
{ 

  namespace range_detail
  {
    bool overlaps( Rel lhs, Rel rhs, int cmp )
    {
      if ( lhs == Rel::NONE || rhs == Rel::NONE )
        return false;
      if ( lhs == Rel::ANY || rhs == Rel::ANY )
        return true;

      if ( lhs == Rel::NE )
      {
          if ( cmp < 0 )
          {
              // lhs < rhs
              return( rhs == Rel::GE 
                      || rhs == Rel::EQ );
          } else if ( cmp > 0)
          {
              // lhs > rhs
              return( rhs == Rel::LT
                      || rhs == Rel::EQ );            
          } else 
          {
              //lhs == rhs
              return ( rhs == Rel::GT
                       || rhs == Rel::LT );
          }
      }
      
      if ( rhs == Rel::NE )
      {
          if ( cmp < 0 )
          {
              // lhs < rhs
              return(  lhs == Rel::LE
                       || lhs == Rel::EQ );
          } else if ( cmp > 0)
          {
              // lhs > rhs
              return(  lhs == Rel::GT
                       || lhs == Rel::EQ );           
          } else
          {
              //lhs == rhs
              return ( lhs == Rel::GT
                       || lhs == Rel::LT );
          }
      }

      if ( cmp < 0 )
        {
          // lhs < rhs: either lhs includes greater values or rhs includes lower.
          return(    lhs == Rel::GT
                  || lhs == Rel::GE
                  || rhs == Rel::LT
                  || rhs == Rel::LE );
        }

      if ( cmp > 0 )
        {
          // lhs > rhs: either lhs includes lower values or rhs includes greater.
          return(    lhs == Rel::LT
                  || lhs == Rel::LE
                  || rhs == Rel::GT
                  || rhs == Rel::GE );
        }

      // lhs == rhs: either both ranges include Rel::EQ, or both head
      // into the same direction.
      if (    ( lhs == Rel::LE || lhs == Rel::EQ || lhs == Rel::GE )
           && ( rhs == Rel::LE || rhs == Rel::EQ || rhs == Rel::GE ) )
        return true;
      if (    ( lhs == Rel::LT && ( rhs == Rel::LT || rhs == Rel::LE ) )
           || ( lhs == Rel::GT && ( rhs == Rel::GT || rhs == Rel::GE ) )
           || ( rhs == Rel::LT && ( lhs == Rel::LT || lhs == Rel::LE ) )
           || ( rhs == Rel::GT && ( lhs == Rel::GT || lhs == Rel::GE ) ) )
        return true;
      // else
      return false;

    }
  }


} // namespace zypp