#include "position.h"

#include <string.h>
#include <stdarg.h>
#include <exception>

Position::Position() :
    iDims( 0 ),
    aiValues( 0 )
{
}

Position::Position( int iDims ) :
    iDims( iDims ),
    aiValues( 0 )
{
    aiValues = new int[iDims];
    memset( aiValues, 0, sizeof(int)*iDims );
}

Position::Position( int iDims, int iX, ...) :
    iDims( iDims ),
    aiValues( 0 )
{
    aiValues = new int[iDims];
    memset( aiValues, 0, sizeof(int)*iDims );

    aiValues[0] = iX;
    va_list ap;
    va_start( ap, iX );
    for( int j = 1; j < iDims; j++ )
    {
        aiValues[j] = va_arg( ap, int );
    }
    va_end( ap );
}

Position::Position( const Position &rhs ) :
    iDims( rhs.iDims ),
    aiValues( 0 )
{
    aiValues = new int[iDims];
    memcpy( aiValues, rhs.aiValues, sizeof(int)*iDims );
}

Position::~Position()
{
    delete[] aiValues;
}

int Position::operator[]( int iIdx ) const
{
    if( iIdx < 0 )
        throw std::exception();
    else if( iIdx >= iDims )
        throw std::exception();

    return aiValues[iIdx];
}

int &Position::operator[]( int iIdx )
{
    if( iIdx < 0 )
        throw std::exception();
    else if( iIdx >= iDims )
        throw std::exception();

    return aiValues[iIdx];
}

Position &Position::operator=( const Position &rhs )
{
    delete[] aiValues;
    iDims = rhs.iDims;
    aiValues = new int[iDims];
    memcpy( aiValues, rhs.aiValues, sizeof(int)*iDims );

    return *this;
}

int Position::getDims() const
{
    return iDims;
}