XorHandler.h

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/****************************************************************************** 
 * 
 *  file:  XorHandler.h
 * 
 *  Copyright (c) 2003, Michael E. Smoot .
 *  Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
 *  All rights reverved.
 * 
 *  See the file COPYING in the top directory of this distribution for
 *  more information.
 *  
 *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
 *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
 *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
 *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 *  DEALINGS IN THE SOFTWARE.  
 *  
 *****************************************************************************/ 

#ifndef TCLAP_XORHANDLER_H
#define TCLAP_XORHANDLER_H

#include <mrpt/otherlibs/tclap/Arg.h>
#include <string>
#include <vector>
#include <algorithm>
#include <iostream>

namespace TCLAP {

/**
 * This class handles lists of Arg's that are to be XOR'd on the command
 * line.  This is used by CmdLine and you shouldn't ever use it.
 */
class XorHandler
{
        protected:

                /**
                 * The list of of lists of Arg's to be or'd together.
                 */
                std::vector< std::vector<Arg*> > _orList;

        public:

                /**
                 * Constructor.  Does nothing.
                 */
                XorHandler( ) {}

                /**
                 * Add a list of Arg*'s that will be orred together.
                 * \param ors - list of Arg* that will be xor'd.
                 */
                void add( std::vector<Arg*>& ors );
                        
                /**
                 * Checks whether the specified Arg is in one of the xor lists and
                 * if it does match one, returns the size of the xor list that the
                 * Arg matched.  If the Arg matches, then it also sets the rest of
                 * the Arg's in the list. You shouldn't use this.  
                 * \param a - The Arg to be checked.
                 */
                int check( const Arg* a );

                /**
                 * Returns the XOR specific short usage.
                 */
                std::string shortUsage();

                /**
                 * Prints the XOR specific long usage.
                 * \param os - Stream to print to.
                 */
                void printLongUsage(std::ostream& os);

                /**
                 * Simply checks whether the Arg is contained in one of the arg
                 * lists.
                 * \param a - The Arg to be checked.
                 */
                bool contains( const Arg* a );

                std::vector< std::vector<Arg*> >& getXorList(); 

};


//////////////////////////////////////////////////////////////////////
//BEGIN XOR.cpp
//////////////////////////////////////////////////////////////////////
inline void XorHandler::add( std::vector<Arg*>& ors )
{ 
        _orList.push_back( ors );
}

inline int XorHandler::check( const Arg* a ) 
{
        // iterate over each XOR list
        for ( int i = 0; static_cast<unsigned int>(i) < _orList.size(); i++ )
        {
                // if the XOR list contains the arg..
                ArgVectorIterator ait = std::find( _orList[i].begin(), 
                                                   _orList[i].end(), a );
                if ( ait != _orList[i].end() )
                {
                        // go through and set each arg that is not a
                        for ( ArgVectorIterator it = _orList[i].begin(); 
                                  it != _orList[i].end(); 
                                  it++ )        
                                if ( a != (*it) )
                                        (*it)->xorSet();

                        // return the number of required args that have now been set
                        if ( (*ait)->allowMore() )
                                return 0;
                        else
                                return static_cast<int>(_orList[i].size());
                }
        }

        if ( a->isRequired() )
                return 1;
        else
                return 0;
}

inline bool XorHandler::contains( const Arg* a )
{
        for ( int i = 0; static_cast<unsigned int>(i) < _orList.size(); i++ )
                for ( ArgVectorIterator it = _orList[i].begin(); 
                          it != _orList[i].end(); 
                          it++ )        
                        if ( a == (*it) )
                                return true;

        return false;
}

inline std::vector< std::vector<Arg*> >& XorHandler::getXorList() 
{
        return _orList;
}



//////////////////////////////////////////////////////////////////////
//END XOR.cpp
//////////////////////////////////////////////////////////////////////

} //namespace TCLAP

#endif