xref: /openbsd-src/gnu/llvm/libcxx/src/valarray.cpp (revision 4bdff4bed0e3d54e55670334c7d0077db4170f86)
1*4bdff4beSrobert //===----------------------------------------------------------------------===//
246035553Spatrick //
346035553Spatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
446035553Spatrick // See https://llvm.org/LICENSE.txt for license information.
546035553Spatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
646035553Spatrick //
746035553Spatrick //===----------------------------------------------------------------------===//
846035553Spatrick 
9*4bdff4beSrobert #include <valarray>
1046035553Spatrick 
1146035553Spatrick _LIBCPP_BEGIN_NAMESPACE_STD
1246035553Spatrick 
1346035553Spatrick // These two symbols are part of the v1 ABI but not part of the >=v2 ABI.
1446035553Spatrick #if _LIBCPP_ABI_VERSION == 1
1546035553Spatrick template _LIBCPP_FUNC_VIS valarray<size_t>::valarray(size_t);
1646035553Spatrick template _LIBCPP_FUNC_VIS valarray<size_t>::~valarray();
1746035553Spatrick #endif
1846035553Spatrick 
1946035553Spatrick template void valarray<size_t>::resize(size_t, size_t);
2046035553Spatrick 
2146035553Spatrick void
__init(size_t __start)2246035553Spatrick gslice::__init(size_t __start)
2346035553Spatrick {
2446035553Spatrick     valarray<size_t> __indices(__size_.size());
2546035553Spatrick     size_t __k = __size_.size() != 0;
2646035553Spatrick     for (size_t __i = 0; __i < __size_.size(); ++__i)
2746035553Spatrick         __k *= __size_[__i];
2846035553Spatrick     __1d_.resize(__k);
2946035553Spatrick     if (__1d_.size())
3046035553Spatrick     {
3146035553Spatrick         __k = 0;
3246035553Spatrick         __1d_[__k] = __start;
3346035553Spatrick         while (true)
3446035553Spatrick         {
3546035553Spatrick             size_t __i = __indices.size() - 1;
3646035553Spatrick             while (true)
3746035553Spatrick             {
3846035553Spatrick                 if (++__indices[__i] < __size_[__i])
3946035553Spatrick                 {
4046035553Spatrick                     ++__k;
4146035553Spatrick                     __1d_[__k] = __1d_[__k-1] + __stride_[__i];
4246035553Spatrick                     for (size_t __j = __i + 1; __j != __indices.size(); ++__j)
4346035553Spatrick                         __1d_[__k] -= __stride_[__j] * (__size_[__j] - 1);
4446035553Spatrick                     break;
4546035553Spatrick                 }
4646035553Spatrick                 else
4746035553Spatrick                 {
4846035553Spatrick                     if (__i == 0)
4946035553Spatrick                         return;
5046035553Spatrick                     __indices[__i--] = 0;
5146035553Spatrick                 }
5246035553Spatrick             }
5346035553Spatrick         }
5446035553Spatrick     }
5546035553Spatrick }
5646035553Spatrick 
5746035553Spatrick _LIBCPP_END_NAMESPACE_STD
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