arrayUtilsImpl.h

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// arrayUtilsImpl.h:
// -----------------
//

#ifndef __IPSDKUTIL_TOOLS_DETAIL_ARRAYUTILSIMPL_H__
#define __IPSDKUTIL_TOOLS_DETAIL_ARRAYUTILSIMPL_H__

#include <IPSDKUtil/IPSDKUtilExports.h>

namespace ipsdk {
namespace arrayop {
namespace detail {


// structures CopyArray and CopyArray_, used to copy a given
// number of elements from a source array to a destination array
template <int begin, int end> struct CopyArray_
{
    template <typename T>
    static IPSDK_FORCEINLINE void act(const T* src, T* dest)
    {
        dest[begin] = src[begin];
        CopyArray_<begin+1, end>::act(src, dest);
    }
};

template <int end> struct CopyArray_<end, end> {
    template <typename T>
    static IPSDK_FORCEINLINE void act(const T* src, T* dest)
    {
        dest[end] = src[end];
    }
};

template <int how_many> struct CopyArray {
    template <typename T>
    static IPSDK_FORCEINLINE void act(const T* src, T* dest)
    {
        CopyArray_<0, how_many-1>::act(src, dest);
    }
};

// structures IndexedIncrement and IndexedIncrement_, used to increment a given
// number of elements of an array
// given by their indexes
// \param a: array, whose elements have to be incremented
// \param idx: array of indexes of the elements in a to be increments
template <int begin, int end> struct IndexedIncrement_
{
    template <typename T> static IPSDK_FORCEINLINE void act(T* a, ipInt32* idx)
    {
        a[idx[begin]] = a[idx[begin]] + 1;
        IndexedIncrement_<begin+1, end>::act(a, idx);
    }
};

template <int end> struct IndexedIncrement_<end, end> {
    template <typename T> static IPSDK_FORCEINLINE void act(T* a, ipInt32* idx)
    {
        a[idx[end]] = a[idx[end]] + 1;
    }
};

template <int how_many> struct IndexedIncrement {
    template <typename T> static IPSDK_FORCEINLINE void act(T* a, ipInt32* idx)
    {
        IndexedIncrement_<0, how_many-1>::act(a, idx);
    }
};


} // end of namespace detail
} // end of namespace arrayop
} // end of namespace ipsdk

#endif // __IPSDKUTIL_TOOLS_DETAIL_ARRAYUTILSIMPL_H__