add bozo_sort

2025-07-12 14:54:10 +00:00 · 2012-07-25 23:10:01 +09:00 · 2012-07-25 23:10:01 +09:00 · 8cd36c14bd
commit 8cd36c14bd
parent a64938fad0
24 changed files with 1322 additions and 8 deletions
--- a/sprout/algorithm/fixed/random_swap_result.hpp
+++ b/sprout/algorithm/fixed/random_swap_result.hpp
@ -0,0 +1,144 @@
+#ifndef SPROUT_ALGORITHM_FIXED_RANDOM_SWAP_RESULT_HPP
+#define SPROUT_ALGORITHM_FIXED_RANDOM_SWAP_RESULT_HPP
+
+#include <cstddef>
+#include <type_traits>
+#include <sprout/config.hpp>
+#include <sprout/array.hpp>
+#include <sprout/tuple/tuple.hpp>
+#include <sprout/container/traits.hpp>
+#include <sprout/container/functions.hpp>
+#include <sprout/iterator/operation.hpp>
+#include <sprout/utility/forward.hpp>
+#include <sprout/algorithm/fixed/result_of.hpp>
+#include <sprout/algorithm/fixed/swap_element.hpp>
+#include <sprout/random/uniform_int_distribution.hpp>
+
+namespace sprout {
+	namespace fixed {
+		namespace detail {
+			template<typename UniformRandomNumberGenerator, typename Random>
+			inline SPROUT_CONSTEXPR sprout::tuples::tuple<
+				sprout::array<std::ptrdiff_t, 2>,
+				typename std::decay<UniformRandomNumberGenerator>::type
+			> make_random_swap_result_indexes_2(
+				Random const& rnd,
+				std::ptrdiff_t i0
+				)
+			{
+				typedef sprout::tuples::tuple<
+					sprout::array<std::ptrdiff_t, 2>,
+					typename std::decay<UniformRandomNumberGenerator>::type
+				> result_type;
+				return result_type(
+					sprout::array<std::ptrdiff_t, 2>{{i0, rnd.result()}},
+					rnd.engine()
+					);
+			}
+			template<typename UniformRandomNumberGenerator, typename Random>
+			inline SPROUT_CONSTEXPR sprout::tuples::tuple<
+				sprout::array<std::ptrdiff_t, 2>,
+				typename std::decay<UniformRandomNumberGenerator>::type
+			> make_random_swap_result_indexes_1(
+				Random const& rnd
+				)
+			{
+				return sprout::fixed::detail::make_random_swap_result_indexes_2<UniformRandomNumberGenerator>(
+					rnd(),
+					rnd.result()
+					);
+			}
+			template<typename UniformRandomNumberGenerator>
+			inline SPROUT_CONSTEXPR sprout::tuples::tuple<
+				sprout::array<std::ptrdiff_t, 2>,
+				typename std::decay<UniformRandomNumberGenerator>::type
+			> make_random_swap_result_indexes(
+				std::ptrdiff_t n,
+				UniformRandomNumberGenerator&& g
+				)
+			{
+				typedef sprout::tuples::tuple<
+					sprout::array<std::ptrdiff_t, 2>,
+					typename std::decay<UniformRandomNumberGenerator>::type
+				> result_type;
+				return n > 1
+					? sprout::fixed::detail::make_random_swap_result_indexes_1<UniformRandomNumberGenerator>(
+						sprout::random::uniform_int_distribution<std::ptrdiff_t>(0, n - 1)(sprout::forward<UniformRandomNumberGenerator>(g))
+						)
+					: result_type(
+						sprout::array<std::ptrdiff_t, 2>{{}},
+						sprout::forward<UniformRandomNumberGenerator>(g)
+						)
+					;
+			}
+			template<typename UniformRandomNumberGenerator, typename Container, typename RandomSwapped>
+			inline SPROUT_CONSTEXPR sprout::tuples::tuple<
+				typename sprout::fixed::result_of::algorithm<Container>::type,
+				typename std::decay<UniformRandomNumberGenerator>::type
+			> random_swap_result_impl_1(
+				Container const& cont,
+				RandomSwapped const& random_swapped
+				)
+			{
+				typedef sprout::tuples::tuple<
+					typename sprout::fixed::result_of::algorithm<Container>::type,
+					typename std::decay<UniformRandomNumberGenerator>::type
+				> result_type;
+				return sprout::tuples::get<0>(random_swapped)[0] == sprout::tuples::get<0>(random_swapped)[1]
+					? result_type(
+						sprout::deep_copy(cont),
+						sprout::tuples::get<1>(random_swapped)
+						)
+					: result_type(
+						sprout::fixed::swap_element(
+							cont,
+							sprout::next(sprout::begin(cont), sprout::tuples::get<0>(random_swapped)[0]),
+							sprout::next(sprout::begin(cont), sprout::tuples::get<0>(random_swapped)[1])
+							),
+						sprout::tuples::get<1>(random_swapped)
+						)
+					;
+			}
+			template<typename Container, typename UniformRandomNumberGenerator>
+			inline SPROUT_CONSTEXPR sprout::tuples::tuple<
+				typename sprout::fixed::result_of::algorithm<Container>::type,
+				typename std::decay<UniformRandomNumberGenerator>::type
+			> random_swap_result_impl(
+				Container const& cont,
+				UniformRandomNumberGenerator&& g,
+				typename sprout::container_traits<Container>::size_type size
+				)
+			{
+				return sprout::fixed::detail::random_swap_result_impl_1<UniformRandomNumberGenerator>(
+					cont,
+					sprout::fixed::detail::make_random_swap_result_indexes(
+						size,
+						sprout::forward<UniformRandomNumberGenerator>(g)
+						)
+					);
+			}
+		}	// namespace detail
+		//
+		// random_swap_result
+		//
+		template<typename Container, typename UniformRandomNumberGenerator>
+		inline SPROUT_CONSTEXPR sprout::tuples::tuple<
+			typename sprout::fixed::result_of::algorithm<Container>::type,
+			typename std::decay<UniformRandomNumberGenerator>::type
+		> random_swap_result(
+			Container const& cont,
+			UniformRandomNumberGenerator&& g
+			)
+		{
+			return sprout::fixed::detail::random_swap_result_impl(
+				cont,
+				sprout::forward<UniformRandomNumberGenerator>(g),
+				sprout::size(cont)
+				);
+		}
+	}	// namespace fixed
+
+	using sprout::fixed::random_swap_result;
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_ALGORITHM_FIXED_RANDOM_SWAP_RESULT_HPP