contrib/libc++/src/valarray.cpp

   1 //===------------------------ valarray.cpp --------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__;
  11
  12 #include "valarray"
  13
  14 _LIBCPP_BEGIN_NAMESPACE_STD
  15
  16 template valarray<size_t>::valarray(size_t);
  17 template valarray<size_t>::~valarray();
  18 template void valarray<size_t>::resize(size_t, size_t);
  19
  20 void
  21 gslice::__init(size_t __start)
  22 {
  23     valarray<size_t> __indices(__size_.size());
  24     size_t __k = __size_.size() != 0;
  25     for (size_t __i = 0; __i < __size_.size(); ++__i)
  26         __k *= __size_[__i];
  27     __1d_.resize(__k);
  28     if (__1d_.size())
  29     {
  30         __k = 0;
  31         __1d_[__k] = __start;
  32         while (true)
  33         {
  34             size_t __i = __indices.size() - 1;
  35             while (true)
  36             {
  37                 if (++__indices[__i] < __size_[__i])
  38                 {
  39                     ++__k;
  40                     __1d_[__k] = __1d_[__k-1] + __stride_[__i];
  41                     for (size_t __j = __i + 1; __j != __indices.size(); ++__j)
  42                         __1d_[__k] -= __stride_[__j] * (__size_[__j] - 1);
  43                     break;
  44                 }
  45                 else
  46                 {
  47                     if (__i == 0)
  48                         return;
  49                     __indices[__i--] = 0;
  50                 }
  51             }
  52         }
  53     }
  54 }
  55
  56 _LIBCPP_END_NAMESPACE_STD