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authorAndrey Khalyavin <halyavin@gmail.com>2022-02-10 16:46:30 +0300
committerDaniil Cherednik <dcherednik@yandex-team.ru>2022-02-10 16:46:30 +0300
commit4b839d0704ee9be1dabb0310a1f03af24963637b (patch)
tree1a2c5ffcf89eb53ecd79dbc9bc0a195c27404d0c /contrib/libs/cxxsupp/libcxx/include/__algorithm/sift_down.h
parentf773626848a7c7456803654292e716b83d69cc12 (diff)
downloadydb-4b839d0704ee9be1dabb0310a1f03af24963637b.tar.gz
Restoring authorship annotation for Andrey Khalyavin <halyavin@gmail.com>. Commit 2 of 2.
Diffstat (limited to 'contrib/libs/cxxsupp/libcxx/include/__algorithm/sift_down.h')
-rw-r--r--contrib/libs/cxxsupp/libcxx/include/__algorithm/sift_down.h158
1 files changed, 79 insertions, 79 deletions
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/sift_down.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/sift_down.h
index b158824b9c..6e801b48b4 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/sift_down.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/sift_down.h
@@ -1,79 +1,79 @@
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP___ALGORITHM_SIFT_DOWN_H
-#define _LIBCPP___ALGORITHM_SIFT_DOWN_H
-
-#include <__config>
-#include <__iterator/iterator_traits.h>
-#include <__utility/move.h>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
-#endif
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-template <class _Compare, class _RandomAccessIterator>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 void
-__sift_down(_RandomAccessIterator __first, _RandomAccessIterator /*__last*/,
- _Compare __comp,
- typename iterator_traits<_RandomAccessIterator>::difference_type __len,
- _RandomAccessIterator __start)
-{
- typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type;
- typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type;
- // left-child of __start is at 2 * __start + 1
- // right-child of __start is at 2 * __start + 2
- difference_type __child = __start - __first;
-
- if (__len < 2 || (__len - 2) / 2 < __child)
- return;
-
- __child = 2 * __child + 1;
- _RandomAccessIterator __child_i = __first + __child;
-
- if ((__child + 1) < __len && __comp(*__child_i, *(__child_i + 1))) {
- // right-child exists and is greater than left-child
- ++__child_i;
- ++__child;
- }
-
- // check if we are in heap-order
- if (__comp(*__child_i, *__start))
- // we are, __start is larger than it's largest child
- return;
-
- value_type __top(_VSTD::move(*__start));
- do
- {
- // we are not in heap-order, swap the parent with its largest child
- *__start = _VSTD::move(*__child_i);
- __start = __child_i;
-
- if ((__len - 2) / 2 < __child)
- break;
-
- // recompute the child based off of the updated parent
- __child = 2 * __child + 1;
- __child_i = __first + __child;
-
- if ((__child + 1) < __len && __comp(*__child_i, *(__child_i + 1))) {
- // right-child exists and is greater than left-child
- ++__child_i;
- ++__child;
- }
-
- // check if we are in heap-order
- } while (!__comp(*__child_i, __top));
- *__start = _VSTD::move(__top);
-}
-
-_LIBCPP_END_NAMESPACE_STD
-
-#endif // _LIBCPP___ALGORITHM_SIFT_DOWN_H
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP___ALGORITHM_SIFT_DOWN_H
+#define _LIBCPP___ALGORITHM_SIFT_DOWN_H
+
+#include <__config>
+#include <__iterator/iterator_traits.h>
+#include <__utility/move.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+template <class _Compare, class _RandomAccessIterator>
+_LIBCPP_CONSTEXPR_AFTER_CXX11 void
+__sift_down(_RandomAccessIterator __first, _RandomAccessIterator /*__last*/,
+ _Compare __comp,
+ typename iterator_traits<_RandomAccessIterator>::difference_type __len,
+ _RandomAccessIterator __start)
+{
+ typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type;
+ typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type;
+ // left-child of __start is at 2 * __start + 1
+ // right-child of __start is at 2 * __start + 2
+ difference_type __child = __start - __first;
+
+ if (__len < 2 || (__len - 2) / 2 < __child)
+ return;
+
+ __child = 2 * __child + 1;
+ _RandomAccessIterator __child_i = __first + __child;
+
+ if ((__child + 1) < __len && __comp(*__child_i, *(__child_i + 1))) {
+ // right-child exists and is greater than left-child
+ ++__child_i;
+ ++__child;
+ }
+
+ // check if we are in heap-order
+ if (__comp(*__child_i, *__start))
+ // we are, __start is larger than it's largest child
+ return;
+
+ value_type __top(_VSTD::move(*__start));
+ do
+ {
+ // we are not in heap-order, swap the parent with its largest child
+ *__start = _VSTD::move(*__child_i);
+ __start = __child_i;
+
+ if ((__len - 2) / 2 < __child)
+ break;
+
+ // recompute the child based off of the updated parent
+ __child = 2 * __child + 1;
+ __child_i = __first + __child;
+
+ if ((__child + 1) < __len && __comp(*__child_i, *(__child_i + 1))) {
+ // right-child exists and is greater than left-child
+ ++__child_i;
+ ++__child;
+ }
+
+ // check if we are in heap-order
+ } while (!__comp(*__child_i, __top));
+ *__start = _VSTD::move(__top);
+}
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___ALGORITHM_SIFT_DOWN_H