libstdc++-v3/src/valarray-inst.cc

   1 // Explicit instantiation file.
   2
   3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
   4 // Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 // As a special exception, you may use this file as part of a free software
  23 // library without restriction.  Specifically, if other files instantiate
  24 // templates or use macros or inline functions from this file, or you compile
  25 // this file and link it with other files to produce an executable, this
  26 // file does not by itself cause the resulting executable to be covered by
  27 // the GNU General Public License.  This exception does not however
  28 // invalidate any other reasons why the executable file might be covered by
  29 // the GNU General Public License.
  30
  31 //
  32 // ISO C++ 14882:
  33 //
  34
  35 #include <valarray>
  36
  37 _GLIBCXX_BEGIN_NAMESPACE(std)
  38
  39   // Some explicit instantiations.
  40   template void
  41      __valarray_fill(size_t* __restrict__, size_t, const size_t&);
  42
  43   template void
  44      __valarray_copy(const size_t* __restrict__, size_t, size_t* __restrict__);
  45
  46   template valarray<size_t>::valarray(size_t);
  47   template valarray<size_t>::valarray(const valarray<size_t>&);
  48   template valarray<size_t>::~valarray();
  49   template size_t valarray<size_t>::size() const;
  50   template size_t& valarray<size_t>::operator[](size_t);
  51
  52   inline size_t
  53   __valarray_product(const valarray<size_t>& __a)
  54   {
  55     typedef const size_t* __restrict__ _Tp;
  56     const size_t __n = __a.size();
  57     // XXX: This ugly cast is necessary because
  58     //      valarray::operator[]() const return a VALUE!
  59     //      Try to get the committee to correct that gross error.
  60     valarray<size_t>& __t = const_cast<valarray<size_t>&>(__a);
  61     return __valarray_product(&__t[0], &__t[0] + __n);
  62   }
  63
  64   // Map a gslice, described by its multidimensional LENGTHS
  65   // and corresponding STRIDES, to a linear array of INDEXES
  66   // for the purpose of indexing a flat, one-dimensional array
  67   // representation of a gslice_array.
  68   void
  69   __gslice_to_index(size_t __o, const valarray<size_t>& __l,
  70                     const valarray<size_t>& __s, valarray<size_t>& __i)
  71   {
  72     // There are as many dimensions as there are strides.
  73     const size_t __n = __l.size();
  74
  75     // Holds current multi-index as we go through the gslice for the
  76     // purpose of computing its linear-image.
  77     valarray<size_t> __t(__l);
  78
  79     // Note that this should match the product of all numbers appearing
  80     // in __l which describes the multidimensional sizes of the
  81     // generalized slice.
  82     const size_t __z = __i.size();
  83
  84     for (size_t __j = 0; __j < __z; ++__j)
  85       {
  86         // Compute the linear-index image of (t_0, ... t_{n-1}).
  87         __i[__j] = __o;
  88
  89         --__t[__n - 1];
  90         __o += __s[__n - 1];
  91
  92         // Process the next multi-index.  The loop ought to be
  93         // backward since we're making a lexicographical visit.
  94         for (size_t __k2 = __n - 1; __k2 && !__t[__k2]; --__k2)
  95           {
  96             __o -= __s[__k2] * __l[__k2];
  97             __t[__k2] = __l[__k2];
  98
  99             --__t[__k2 - 1];
 100             __o += __s[__k2 - 1];
 101           }
 102       }
 103   }
 104
 105   gslice::_Indexer::_Indexer(size_t __o, const valarray<size_t>& __l,
 106                              const valarray<size_t>& __s)
 107   : _M_count(1), _M_start(__o), _M_size(__l), _M_stride(__s),
 108     _M_index(__l.size() == 0 ? 0 : __valarray_product(__l))
 109   { __gslice_to_index(__o, __l, __s, _M_index); }
 110
 111 _GLIBCXX_END_NAMESPACE