xref: /freebsd/contrib/llvm-project/libcxx/src/valarray.cpp (revision 06c3fb2749bda94cb5201f81ffdb8fa6c3161b2e)
1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include <valarray>
10 
11 _LIBCPP_BEGIN_NAMESPACE_STD
12 
13 // These two symbols are part of the v1 ABI but not part of the >=v2 ABI.
14 #if _LIBCPP_ABI_VERSION == 1
15 template _LIBCPP_EXPORTED_FROM_ABI valarray<size_t>::valarray(size_t);
16 template _LIBCPP_EXPORTED_FROM_ABI valarray<size_t>::~valarray();
17 #endif
18 
19 template void valarray<size_t>::resize(size_t, size_t);
20 
21 void
22 gslice::__init(size_t __start)
23 {
24     valarray<size_t> __indices(__size_.size());
25     size_t __k = __size_.size() != 0;
26     for (size_t __i = 0; __i < __size_.size(); ++__i)
27         __k *= __size_[__i];
28     __1d_.resize(__k);
29     if (__1d_.size())
30     {
31         __k = 0;
32         __1d_[__k] = __start;
33         while (true)
34         {
35             size_t __i = __indices.size() - 1;
36             while (true)
37             {
38                 if (++__indices[__i] < __size_[__i])
39                 {
40                     ++__k;
41                     __1d_[__k] = __1d_[__k-1] + __stride_[__i];
42                     for (size_t __j = __i + 1; __j != __indices.size(); ++__j)
43                         __1d_[__k] -= __stride_[__j] * (__size_[__j] - 1);
44                     break;
45                 }
46                 else
47                 {
48                     if (__i == 0)
49                         return;
50                     __indices[__i--] = 0;
51                 }
52             }
53         }
54     }
55 }
56 
57 _LIBCPP_END_NAMESPACE_STD
58