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 
__init(size_t __start)21 void gslice::__init(size_t __start) {
22   valarray<size_t> __indices(__size_.size());
23   size_t __k = __size_.size() != 0;
24   for (size_t __i = 0; __i < __size_.size(); ++__i)
25     __k *= __size_[__i];
26   __1d_.resize(__k);
27   if (__1d_.size()) {
28     __k        = 0;
29     __1d_[__k] = __start;
30     while (true) {
31       size_t __i = __indices.size() - 1;
32       while (true) {
33         if (++__indices[__i] < __size_[__i]) {
34           ++__k;
35           __1d_[__k] = __1d_[__k - 1] + __stride_[__i];
36           for (size_t __j = __i + 1; __j != __indices.size(); ++__j)
37             __1d_[__k] -= __stride_[__j] * (__size_[__j] - 1);
38           break;
39         } else {
40           if (__i == 0)
41             return;
42           __indices[__i--] = 0;
43         }
44       }
45     }
46   }
47 }
48 
49 _LIBCPP_END_NAMESPACE_STD
50