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/*
 * File:   G4ArrayOps.hh
 * Author: B. Wendt (wendbryc@isu.edu)
 *
 * Created on July 28, 2012, 16:08
 */

// All the arrays that use the functions in this namespace MUST have a
// [] (bracket) operator for element-wise access

#ifndef G4ARRAYOPS_HH
#define	G4ARRAYOPS_HH

#include <vector>

#include "globals.hh"

/** G4ArrayOps is a namespace that provides template functions for
 *  performing basic arithmatic operations on any data type that
 *  is accessed with the [] operator.
 */
namespace G4ArrayOps
{
    /** Set's all the values in an array to a constant */
    template< class T >
    void Set( G4int Elements,
               T* To,
               T Value )
    {
        for(G4int position = 0; position < Elements; position++)
        {
            To[position] = Value;
        }
    }

    /** Copy values from one array to another */
    template< class T >
    void Copy( G4int Elements,
               T* To,
               T* From )
    {
        for(G4int position = 0; position < Elements; position++)
        {
            To[position] = From[position];
        }
    }

    /** Add two arrays together. If the second array is NULL then the
     *  'To' array is used as if the function were the += operator.
     */
    template< class T >
    void Add( G4int Elements,
              T* To,
              T* A1,
              T* A2 = NULL )
    {
        if(A2 == NULL)
        {
            A2 = To;
        }

        for(G4int position = 0; position < Elements; position++)
        {
            To[position] = A2[position] + A1[position];
        }
    }

    /** Add a constant to an array. If the second array is NULL then the
     *  'To' array is used as if the function were the += operator.
     */
    template< class T >
    void Add( G4int Elements,
              T* To,
              T A1,
              T* A2 = NULL )
    {
        if(A2 == NULL)
        {
            A2 = To;
        }

        for(G4int position = 0; position < Elements; position++)
        {
            To[position] = A1 + A2[position];
        }
    }

    /** Subtract an array from another. If the second array is NULL then the
     *  'To' array is used as if the function were the -= operator.
     */
    template< class T >
    void Subtract( G4int Elements,
                   T* To,
                   T* Minuend,
                   T* Subtrahend = NULL )
    {
        if(Subtrahend == NULL)
        {
            Subtrahend = Minuend;
            Minuend = To;
        }

        for(G4int position = 0; position < Elements; position++)
        {
            To[position] = Minuend[position] - Subtrahend[position];
        }
    }

    /** Multiply two arrays together. If the second array is NULL then the
     *  'To' array is used as if the function were the *= operator.
     */
    template< class T >
    void Multiply( G4int Elements,
                   T* To,
                   T* M1,
                   T* M2 = NULL )
    {
        if(M2 == NULL)
        {
            M2 = To;
        }

        for(G4int position = 0; position < Elements; position++)
        {
            To[position] = M2[position] * M1[position];
        }
    }

    /** Multiply an array by a constant. If the second array is NULL then the
     *  'To' array is used as if the function were the *= operator.
     */
    template< class T >
    void Multiply( G4int Elements,
                   T* To,
                   T M1,
                   T* M2 = NULL )
    {
        if(M2 == NULL)
        {
            M2 = To;
        }

        for(G4int position = 0; position < Elements; position++)
        {
            To[position] = M2[position] * M1;
        }
    }

    /** Divide an array by another. If the second array is NULL then the
     *  'To' array is used as if the function were the /= operator.
     */
    template< class T >
    void Divide( G4int Elements,
                 T* To,
                 T* Numerator,
                 T* Denominator = NULL )
    {
        if(Denominator == NULL)
        {
            Denominator = Numerator;
            Numerator = To;
        }

        for(G4int position = 0; position < Elements; position++)
        {
            To[position] = Numerator[position] / Denominator[position];
        }
    }

    /** Divide a constant by an array. If the second array is NULL then the
     *  'To' array is used as if the function were the /= operator.
     */
    template< class T >
    void Divide( G4int Elements,
                 T* To,
                 T Numerator,
                 T* Denominator = NULL )
    {
        if(Denominator == NULL)
        {
            Denominator = To;
        }

        for(G4int position = 0; position < Elements; position++)
        {
            To[position] = Numerator / Denominator[position];
        }
    }

    template< class T >
    void DeleteVectorOfPointers( std::vector< T >& Vector )
    {
    	for(unsigned int i = 0; i < Vector.size(); i++)
    	{
			delete Vector[i];
		}

    	delete &Vector;
    }
}

#endif  /** G4ARRAYOPS_HH */