valarray_array.h (__valarray_get_storage): New function.

[gcc.git] / libstdc++-v3 / src / valarray-inst.cc

#include <bits/std_valarray.h>

namespace std
{
    // Some explicit instanciations.
    template void
    __valarray_fill(size_t* __restrict__, size_t, const size_t&);

    template void
    __valarray_copy(const size_t* __restrict__, size_t, size_t* __restrict__);

    template size_t
    __valarray_product(const size_t* __restrict__, const size_t* __restrict__);

    template valarray<size_t>::valarray(size_t);
    template valarray<size_t>::valarray(const valarray<size_t>&);
    template valarray<size_t>::~valarray();
    template size_t valarray<size_t>::size() const;
    template size_t& valarray<size_t>::operator[](size_t);


    inline size_t
    __valarray_product(const valarray<size_t>& __a)
    {
        typedef const size_t* __restrict__ _Tp;
        const size_t __n = __a.size();
        // XXX: This ugly cast is necessary because
        //      valarray::operator[]() const return a VALUE!
        //      Try to get the committee to correct that gross error.
        valarray<size_t>& __t = const_cast<valarray<size_t>&>(__a);
        return __valarray_product(&__t[0], &__t[0] + __n);
    }
    
    void __gslice_to_index(size_t __o, const valarray<size_t>& __l,
                           const valarray<size_t>& __s,
                           valarray<size_t>& __i)
    {
        size_t __n = __l.size();
        size_t* const __t = static_cast<size_t*>
            (__builtin_alloca(__n*sizeof(size_t)));
        __valarray_fill(__t, __n, size_t(0));
        const size_t __z = __i.size();
        __valarray_fill(&__i[0], __z, __o);
        for (size_t __j=0; __j<__z; ++__j) {
            for (size_t __k=0; __k<__n; ++__k)
                __i[__j] += __s[__k]*__t[__k];
            ++__t[__n-1];
            for (size_t __k=__n-1; __k; --__k) {
                if (__t[__k] >= __l[__k]) {
                    __t[__k] = 0;
                    ++__t[__k-1];
                }
            }
        }
    }
    
    gslice::_Indexer::_Indexer(size_t __o, const valarray<size_t>& __s,
                               const valarray<size_t>& __l)
            : _M_count(1), _M_start(__o), _M_size(__s), _M_stride(__l),
              _M_index(__l.size() ? __valarray_product(__l) : 0)
    { __gslice_to_index(__o, __l, __s, _M_index); }

}