IndirectObject.h

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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Written (W) 2009 Soeren Sonnenburg
 * Copyright (C) 2009 Fraunhofer Institute FIRST and Max Planck Society
 */
#ifndef __INDIRECTOBJECT_H__
#define __INDIRECTOBJECT_H__

#include <shogun/lib/config.h>

#include <shogun/lib/common.h>

namespace shogun
{
template <class T, class P> class CIndirectObject
{
    public:
        CIndirectObject() : index(-1)
        {
        }

        CIndirectObject(int32_t idx)
        {
            index=idx;
        }

        static void set_array(P a)
        {
            array=a;
        }

        static P get_array()
        {
            return array;
        }

        static void init_slice(CIndirectObject<T,P>* a, int32_t len, int32_t start=0, int32_t stop=-1)
        {
            if (stop==-1)
                stop=len;

            for (int32_t i=start; i<stop && i<len; i++)
                a[i].index=i;
        }

        CIndirectObject<T,P>& operator=(const CIndirectObject<T,P>& x)
        {
            index=x.index;
            return *this;
        }

        T operator|(const CIndirectObject<T,P>& x) const
        {
            return (*array)[index] | *(x.array)[x.index];
        }

        const T operator&(const CIndirectObject<T,P>& x) const
        {
            return (*array)[index] & *(x.array)[x.index];
        }

        T operator<<(int shift)
        {
            return (*array)[index] << shift;
        }

        T operator>>(int shift)
        {
            return (*array)[index] >> shift;
        }

        T operator^(const CIndirectObject<T,P>& x) const
        {
            return (*array)[index] ^ *(x.array)[x.index];
        }

        T operator+(const CIndirectObject<T,P> &x) const
        {
            return (*array)[index] + *(x.array)[x.index];
        }

        T operator-(const CIndirectObject<T,P> &x) const
        {
            return (*array)[index] - *(x.array)[x.index];
        }

        T operator/(const CIndirectObject<T,P> &x) const
        {
            return (*array)[index] / *(x.array)[x.index];
        }

        T operator*(const CIndirectObject<T,P> &x) const
        {
            return (*array)[index] * *(x.array)[x.index];
        }

        CIndirectObject<T,P>& operator+=(const CIndirectObject<T,P> &x)
        {
            (*array)[index]+=*(x.array)[x.index];
            return *this;
        }

        CIndirectObject<T,P>& operator-=(const CIndirectObject<T,P> &x)
        {
            (*array)[index]-=*(x.array)[x.index];
            return *this;
        }

        CIndirectObject<T,P>& operator*=(const CIndirectObject<T,P> &x)
        {
            (*array)[index]*=*(x.array)[x.index];
            return *this;
        }

        CIndirectObject<T,P>& operator/=(const CIndirectObject<T,P> &x)
        {
            (*array)[index]/=*(x.array)[x.index];
            return *this;
        }

        bool operator==(const CIndirectObject<T,P> &x) const
        {
            return (*array)[index]==*(x.array)[x.index];
        }

        bool operator>=(const CIndirectObject<T,P> &x) const
        {
            return (*array)[index]>=*(x.array)[x.index];
        }

        bool operator<=(const CIndirectObject<T,P> &x) const
        {
            return (*array)[index]<=*(x.array)[x.index];
        }

        bool operator>(const CIndirectObject<T,P> &x) const
        {
            return (*array)[index]>(*(x.array))[x.index];
        }

        bool operator<(const CIndirectObject<T,P> &x) const
        {
            return (*array)[index]<(*(x.array))[x.index];
        }

        bool operator!=(const CIndirectObject<T,P> &x) const
        {
            return (*array)[index]!=(*(x.array))[x.index];
        }

        CIndirectObject<T,P>& operator|=(const CIndirectObject<T,P>& x)
        {
            (*array)[index]|=(*(x.array))[x.index];
            return *this;
        }

        CIndirectObject<T,P>& operator&=(const CIndirectObject<T,P>& x)
        {
            (*array)[index]&=(*(x.array))[x.index];
            return *this;
        }

        CIndirectObject<T,P>& operator^=(const CIndirectObject<T,P>& x)
        {
            (*array)[index]^=(*(x.array))[x.index];
            return *this;
        }

        CIndirectObject<T,P>& operator<<=(int shift)
        {
            *this=*this<<shift;
            return *this;
        }

        CIndirectObject<T,P>& operator>>=(int shift)
        {
            *this=*this>>shift;
            return *this;
        }

        T operator~()
        {
            return ~(*array)[index];
        }

        operator T() const { return (*array)[index]; }

        CIndirectObject<T,P>& operator--()
        {
            (*array)[index]--;
            return *this;
        }

        CIndirectObject<T,P>& operator++()
        {
            (*array)[index]++;
            return *this;
        }

    protected:
        static P array;

        int32_t index;
};

template <class T, class P> P CIndirectObject<T,P>::array;
}
#endif //__INDIRECTOBJECT_H__