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1349 lines
58 KiB
1349 lines
58 KiB
/* |
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* Copyright 2008-2012 NVIDIA Corporation |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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/*! \file sort.h |
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* \brief Functions for reorganizing ranges into sorted order |
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*/ |
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#pragma once |
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#include <thrust/detail/config.h> |
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#include <thrust/detail/execution_policy.h> |
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namespace thrust |
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{ |
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/*! \addtogroup sorting |
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* \ingroup algorithms |
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* \{ |
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*/ |
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|
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/*! \p sort sorts the elements in <tt>[first, last)</tt> into |
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* ascending order, meaning that if \c i and \c j are any two valid |
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* iterators in <tt>[first, last)</tt> such that \c i precedes \c j, |
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* then \c *j is not less than \c *i. Note: \c sort is not guaranteed |
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* to be stable. That is, suppose that \c *i and \c *j are equivalent: |
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* neither one is less than the other. It is not guaranteed that the |
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* relative order of these two elements will be preserved by \p sort. |
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* |
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* This version of \p sort compares objects using \c operator<. |
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* |
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* The algorithm's execution is parallelized as determined by \p exec. |
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* |
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* \param exec The execution policy to use for parallelization. |
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* \param first The beginning of the sequence. |
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* \param last The end of the sequence. |
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* |
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* \tparam DerivedPolicy The name of the derived execution policy. |
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* \tparam RandomAccessIterator is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
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* \p RandomAccessIterator is mutable, |
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* and \p RandomAccessIterator's \c value_type is a model of <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a>, |
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* and the ordering relation on \p RandomAccessIterator's \c value_type is a <em>strict weak ordering</em>, as defined in the |
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* <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a> requirements. |
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* |
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* The following code snippet demonstrates how to use \p sort to sort |
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* a sequence of integers using the \p thrust::host execution policy for parallelization: |
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* |
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* \code |
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* #include <thrust/sort.h> |
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* #include <thrust/execution_policy.h> |
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* ... |
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* const int N = 6; |
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* int A[N] = {1, 4, 2, 8, 5, 7}; |
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* thrust::sort(thrust::host, A, A + N); |
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* // A is now {1, 2, 4, 5, 7, 8} |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/sort.html |
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* \see \p stable_sort |
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* \see \p sort_by_key |
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*/ |
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template<typename DerivedPolicy, typename RandomAccessIterator> |
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void sort(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
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RandomAccessIterator first, |
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RandomAccessIterator last); |
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|
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|
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/*! \p sort sorts the elements in <tt>[first, last)</tt> into |
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* ascending order, meaning that if \c i and \c j are any two valid |
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* iterators in <tt>[first, last)</tt> such that \c i precedes \c j, |
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* then \c *j is not less than \c *i. Note: \c sort is not guaranteed |
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* to be stable. That is, suppose that \c *i and \c *j are equivalent: |
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* neither one is less than the other. It is not guaranteed that the |
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* relative order of these two elements will be preserved by \p sort. |
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* |
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* This version of \p sort compares objects using \c operator<. |
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* |
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* \param first The beginning of the sequence. |
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* \param last The end of the sequence. |
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* |
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* \tparam RandomAccessIterator is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
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* \p RandomAccessIterator is mutable, |
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* and \p RandomAccessIterator's \c value_type is a model of <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a>, |
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* and the ordering relation on \p RandomAccessIterator's \c value_type is a <em>strict weak ordering</em>, as defined in the |
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* <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a> requirements. |
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* |
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* The following code snippet demonstrates how to use \p sort to sort |
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* a sequence of integers. |
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* |
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* \code |
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* #include <thrust/sort.h> |
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* ... |
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* const int N = 6; |
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* int A[N] = {1, 4, 2, 8, 5, 7}; |
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* thrust::sort(A, A + N); |
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* // A is now {1, 2, 4, 5, 7, 8} |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/sort.html |
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* \see \p stable_sort |
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* \see \p sort_by_key |
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*/ |
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template<typename RandomAccessIterator> |
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void sort(RandomAccessIterator first, |
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RandomAccessIterator last); |
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/*! \p sort sorts the elements in <tt>[first, last)</tt> into |
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* ascending order, meaning that if \c i and \c j are any two valid |
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* iterators in <tt>[first, last)</tt> such that \c i precedes \c j, |
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* then \c *j is not less than \c *i. Note: \c sort is not guaranteed |
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* to be stable. That is, suppose that \c *i and \c *j are equivalent: |
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* neither one is less than the other. It is not guaranteed that the |
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* relative order of these two elements will be preserved by \p sort. |
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* |
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* This version of \p sort compares objects using a function object |
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* \p comp. |
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* |
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* The algorithm's execution is parallelized as determined by \p exec. |
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* |
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* \param exec The execution policy to use for parallelization. |
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* \param first The beginning of the sequence. |
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* \param last The end of the sequence. |
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* \param comp Comparison operator. |
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* |
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* \tparam DerivedPolicy The name of the derived execution policy. |
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* \tparam RandomAccessIterator is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
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* \p RandomAccessIterator is mutable, |
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* and \p RandomAccessIterator's \c value_type is convertible to \p StrictWeakOrdering's |
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* \c first_argument_type and \c second_argument_type. |
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* \tparam StrictWeakOrdering is a model of <a href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">Strict Weak Ordering</a>. |
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* |
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* The following code demonstrates how to sort integers in descending order |
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* using the greater<int> comparison operator using the \p thrust::host execution policy for parallelization: |
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* |
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* \code |
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* #include <thrust/sort.h> |
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* #include <thrust/functional.h> |
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* #include <thrust/execution_policy.h> |
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* ... |
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* const int N = 6; |
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* int A[N] = {1, 4, 2, 8, 5, 7}; |
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* thrust::sort(thrust::host, A, A + N, thrust::greater<int>()); |
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* // A is now {8, 7, 5, 4, 2, 1}; |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/sort.html |
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* \see \p stable_sort |
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* \see \p sort_by_key |
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*/ |
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template<typename DerivedPolicy, |
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typename RandomAccessIterator, |
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typename StrictWeakOrdering> |
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void sort(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
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RandomAccessIterator first, |
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RandomAccessIterator last, |
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StrictWeakOrdering comp); |
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|
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|
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/*! \p sort sorts the elements in <tt>[first, last)</tt> into |
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* ascending order, meaning that if \c i and \c j are any two valid |
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* iterators in <tt>[first, last)</tt> such that \c i precedes \c j, |
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* then \c *j is not less than \c *i. Note: \c sort is not guaranteed |
|
* to be stable. That is, suppose that \c *i and \c *j are equivalent: |
|
* neither one is less than the other. It is not guaranteed that the |
|
* relative order of these two elements will be preserved by \p sort. |
|
* |
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* This version of \p sort compares objects using a function object |
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* \p comp. |
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* |
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* \param first The beginning of the sequence. |
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* \param last The end of the sequence. |
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* \param comp Comparison operator. |
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* |
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* \tparam RandomAccessIterator is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
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* \p RandomAccessIterator is mutable, |
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* and \p RandomAccessIterator's \c value_type is convertible to \p StrictWeakOrdering's |
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* \c first_argument_type and \c second_argument_type. |
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* \tparam StrictWeakOrdering is a model of <a href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">Strict Weak Ordering</a>. |
|
* |
|
* The following code demonstrates how to sort integers in descending order |
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* using the greater<int> comparison operator. |
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* |
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* \code |
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* #include <thrust/sort.h> |
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* #include <thrust/functional.h> |
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* ... |
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* const int N = 6; |
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* int A[N] = {1, 4, 2, 8, 5, 7}; |
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* thrust::sort(A, A + N, thrust::greater<int>()); |
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* // A is now {8, 7, 5, 4, 2, 1}; |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/sort.html |
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* \see \p stable_sort |
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* \see \p sort_by_key |
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*/ |
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template<typename RandomAccessIterator, |
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typename StrictWeakOrdering> |
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void sort(RandomAccessIterator first, |
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RandomAccessIterator last, |
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StrictWeakOrdering comp); |
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|
|
|
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/*! \p stable_sort is much like \c sort: it sorts the elements in |
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* <tt>[first, last)</tt> into ascending order, meaning that if \c i |
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* and \c j are any two valid iterators in <tt>[first, last)</tt> such |
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* that \c i precedes \c j, then \c *j is not less than \c *i. |
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* |
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* As the name suggests, \p stable_sort is stable: it preserves the |
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* relative ordering of equivalent elements. That is, if \c x and \c y |
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* are elements in <tt>[first, last)</tt> such that \c x precedes \c y, |
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* and if the two elements are equivalent (neither <tt>x < y</tt> nor |
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* <tt>y < x</tt>) then a postcondition of \p stable_sort is that \c x |
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* still precedes \c y. |
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* |
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* This version of \p stable_sort compares objects using \c operator<. |
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* |
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* The algorithm's execution is parallelized as determined by \p exec. |
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* |
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* \param exec The execution policy to use for parallelization. |
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* \param first The beginning of the sequence. |
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* \param last The end of the sequence. |
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* |
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* \tparam DerivedPolicy The name of the derived execution policy. |
|
* \tparam RandomAccessIterator is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
|
* \p RandomAccessIterator is mutable, |
|
* and \p RandomAccessIterator's \c value_type is a model of <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a>, |
|
* and the ordering relation on \p RandomAccessIterator's \c value_type is a <em>strict weak ordering</em>, as defined in the |
|
* <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a> requirements. |
|
* |
|
* The following code snippet demonstrates how to use \p sort to sort |
|
* a sequence of integers using the \p thrust::host execution policy for parallelization: |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* #include <thrust/execution_policy.h> |
|
* ... |
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* const int N = 6; |
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* int A[N] = {1, 4, 2, 8, 5, 7}; |
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* thrust::stable_sort(thrust::host, A, A + N); |
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* // A is now {1, 2, 4, 5, 7, 8} |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/stable_sort.html |
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* \see \p sort |
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* \see \p stable_sort_by_key |
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*/ |
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template<typename DerivedPolicy, typename RandomAccessIterator> |
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void stable_sort(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
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RandomAccessIterator first, |
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RandomAccessIterator last); |
|
|
|
|
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/*! \p stable_sort is much like \c sort: it sorts the elements in |
|
* <tt>[first, last)</tt> into ascending order, meaning that if \c i |
|
* and \c j are any two valid iterators in <tt>[first, last)</tt> such |
|
* that \c i precedes \c j, then \c *j is not less than \c *i. |
|
* |
|
* As the name suggests, \p stable_sort is stable: it preserves the |
|
* relative ordering of equivalent elements. That is, if \c x and \c y |
|
* are elements in <tt>[first, last)</tt> such that \c x precedes \c y, |
|
* and if the two elements are equivalent (neither <tt>x < y</tt> nor |
|
* <tt>y < x</tt>) then a postcondition of \p stable_sort is that \c x |
|
* still precedes \c y. |
|
* |
|
* This version of \p stable_sort compares objects using \c operator<. |
|
* |
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* \param first The beginning of the sequence. |
|
* \param last The end of the sequence. |
|
* |
|
* \tparam RandomAccessIterator is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
|
* \p RandomAccessIterator is mutable, |
|
* and \p RandomAccessIterator's \c value_type is a model of <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a>, |
|
* and the ordering relation on \p RandomAccessIterator's \c value_type is a <em>strict weak ordering</em>, as defined in the |
|
* <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a> requirements. |
|
* |
|
* The following code snippet demonstrates how to use \p sort to sort |
|
* a sequence of integers. |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* ... |
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* const int N = 6; |
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* int A[N] = {1, 4, 2, 8, 5, 7}; |
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* thrust::stable_sort(A, A + N); |
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* // A is now {1, 2, 4, 5, 7, 8} |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/stable_sort.html |
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* \see \p sort |
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* \see \p stable_sort_by_key |
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*/ |
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template<typename RandomAccessIterator> |
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void stable_sort(RandomAccessIterator first, |
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RandomAccessIterator last); |
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|
|
|
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/*! \p stable_sort is much like \c sort: it sorts the elements in |
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* <tt>[first, last)</tt> into ascending order, meaning that if \c i |
|
* and \c j are any two valid iterators in <tt>[first, last)</tt> such |
|
* that \c i precedes \c j, then \c *j is not less than \c *i. |
|
* |
|
* As the name suggests, \p stable_sort is stable: it preserves the |
|
* relative ordering of equivalent elements. That is, if \c x and \c y |
|
* are elements in <tt>[first, last)</tt> such that \c x precedes \c y, |
|
* and if the two elements are equivalent (neither <tt>x < y</tt> nor |
|
* <tt>y < x</tt>) then a postcondition of \p stable_sort is that \c x |
|
* still precedes \c y. |
|
* |
|
* This version of \p stable_sort compares objects using a function object |
|
* \p comp. |
|
* |
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* The algorithm's execution is parallelized as determined by \p exec. |
|
* |
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* \param exec The execution policy to use for parallelization. |
|
* \param first The beginning of the sequence. |
|
* \param last The end of the sequence. |
|
* \param comp Comparison operator. |
|
* |
|
* \tparam DerivedPolicy The name of the derived execution policy. |
|
* \tparam RandomAccessIterator is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
|
* \p RandomAccessIterator is mutable, |
|
* and \p RandomAccessIterator's \c value_type is convertible to \p StrictWeakOrdering's |
|
* \c first_argument_type and \c second_argument_type. |
|
* \tparam StrictWeakOrdering is a model of <a href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">Strict Weak Ordering</a>. |
|
* |
|
* The following code demonstrates how to sort integers in descending order |
|
* using the greater<int> comparison operator using the \p thrust::host execution policy for parallelization: |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* #include <thrust/functional.h> |
|
* #include <thrust/execution_policy.h> |
|
* ... |
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* const int N = 6; |
|
* int A[N] = {1, 4, 2, 8, 5, 7}; |
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* thrust::sort(A, A + N, thrust::greater<int>()); |
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* // A is now {8, 7, 5, 4, 2, 1}; |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/stable_sort.html |
|
* \see \p sort |
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* \see \p stable_sort_by_key |
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*/ |
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template<typename DerivedPolicy, |
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typename RandomAccessIterator, |
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typename StrictWeakOrdering> |
|
void stable_sort(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
|
RandomAccessIterator first, |
|
RandomAccessIterator last, |
|
StrictWeakOrdering comp); |
|
|
|
|
|
/*! \p stable_sort is much like \c sort: it sorts the elements in |
|
* <tt>[first, last)</tt> into ascending order, meaning that if \c i |
|
* and \c j are any two valid iterators in <tt>[first, last)</tt> such |
|
* that \c i precedes \c j, then \c *j is not less than \c *i. |
|
* |
|
* As the name suggests, \p stable_sort is stable: it preserves the |
|
* relative ordering of equivalent elements. That is, if \c x and \c y |
|
* are elements in <tt>[first, last)</tt> such that \c x precedes \c y, |
|
* and if the two elements are equivalent (neither <tt>x < y</tt> nor |
|
* <tt>y < x</tt>) then a postcondition of \p stable_sort is that \c x |
|
* still precedes \c y. |
|
* |
|
* This version of \p stable_sort compares objects using a function object |
|
* \p comp. |
|
* |
|
* \param first The beginning of the sequence. |
|
* \param last The end of the sequence. |
|
* \param comp Comparison operator. |
|
* |
|
* \tparam RandomAccessIterator is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
|
* \p RandomAccessIterator is mutable, |
|
* and \p RandomAccessIterator's \c value_type is convertible to \p StrictWeakOrdering's |
|
* \c first_argument_type and \c second_argument_type. |
|
* \tparam StrictWeakOrdering is a model of <a href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">Strict Weak Ordering</a>. |
|
* |
|
* The following code demonstrates how to sort integers in descending order |
|
* using the greater<int> comparison operator. |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* #include <thrust/functional.h> |
|
* ... |
|
* const int N = 6; |
|
* int A[N] = {1, 4, 2, 8, 5, 7}; |
|
* thrust::sort(A, A + N, thrust::greater<int>()); |
|
* // A is now {8, 7, 5, 4, 2, 1}; |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/stable_sort.html |
|
* \see \p sort |
|
* \see \p stable_sort_by_key |
|
*/ |
|
template<typename RandomAccessIterator, |
|
typename StrictWeakOrdering> |
|
void stable_sort(RandomAccessIterator first, |
|
RandomAccessIterator last, |
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StrictWeakOrdering comp); |
|
|
|
|
|
/////////////// |
|
// Key Value // |
|
/////////////// |
|
|
|
|
|
/*! \p sort_by_key performs a key-value sort. That is, \p sort_by_key sorts the |
|
* elements in <tt>[keys_first, keys_last)</tt> and <tt>[values_first, |
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* values_first + (keys_last - keys_first))</tt> into ascending key order, |
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* meaning that if \c i and \c j are any two valid iterators in <tt>[keys_first, |
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* keys_last)</tt> such that \c i precedes \c j, and \c p and \c q are iterators |
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* in <tt>[values_first, values_first + (keys_last - keys_first))</tt> |
|
* corresponding to \c i and \c j respectively, then \c *j is not less than |
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* \c *i. |
|
* |
|
* Note: \c sort_by_key is not guaranteed to be stable. That is, suppose that |
|
* \c *i and \c *j are equivalent: neither one is less than the other. It is not |
|
* guaranteed that the relative order of these two keys or the relative |
|
* order of their corresponding values will be preserved by \p sort_by_key. |
|
* |
|
* This version of \p sort_by_key compares key objects using \c operator<. |
|
* |
|
* The algorithm's execution is parallelized as determined by \p exec. |
|
* |
|
* \param exec The execution policy to use for parallelization. |
|
* \param keys_first The beginning of the key sequence. |
|
* \param keys_last The end of the key sequence. |
|
* \param values_first The beginning of the value sequence. |
|
* |
|
* \tparam DerivedPolicy The name of the derived execution policy. |
|
* \tparam RandomAccessIterator1 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
|
* \p RandomAccessIterator1 is mutable, |
|
* and \p RandomAccessIterator1's \c value_type is a model of <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a>, |
|
* and the ordering relation on \p RandomAccessIterator1's \c value_type is a <em>strict weak ordering</em>, as defined in the |
|
* <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a> requirements. |
|
* \tparam RandomAccessIterator2 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.hml">Random Access Iterator</a>, |
|
* and \p RandomAccessIterator2 is mutable. |
|
* |
|
* \pre The range <tt>[keys_first, keys_last))</tt> shall not overlap the range <tt>[values_first, values_first + (keys_last - keys_first))</tt>. |
|
* |
|
* The following code snippet demonstrates how to use \p sort_by_key to sort |
|
* an array of character values using integers as sorting keys using the \p thrust::host execution policy |
|
* for parallelization: |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* #include <thrust/execution_policy.h> |
|
* ... |
|
* const int N = 6; |
|
* int keys[N] = { 1, 4, 2, 8, 5, 7}; |
|
* char values[N] = {'a', 'b', 'c', 'd', 'e', 'f'}; |
|
* thrust::sort_by_key(thrust::host, keys, keys + N, values); |
|
* // keys is now { 1, 2, 4, 5, 7, 8} |
|
* // values is now {'a', 'c', 'b', 'e', 'f', 'd'} |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/sort.html |
|
* \see \p stable_sort_by_key |
|
* \see \p sort |
|
*/ |
|
template<typename DerivedPolicy, |
|
typename RandomAccessIterator1, |
|
typename RandomAccessIterator2> |
|
void sort_by_key(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
|
RandomAccessIterator1 keys_first, |
|
RandomAccessIterator1 keys_last, |
|
RandomAccessIterator2 values_first); |
|
|
|
|
|
/*! \p sort_by_key performs a key-value sort. That is, \p sort_by_key sorts the |
|
* elements in <tt>[keys_first, keys_last)</tt> and <tt>[values_first, |
|
* values_first + (keys_last - keys_first))</tt> into ascending key order, |
|
* meaning that if \c i and \c j are any two valid iterators in <tt>[keys_first, |
|
* keys_last)</tt> such that \c i precedes \c j, and \c p and \c q are iterators |
|
* in <tt>[values_first, values_first + (keys_last - keys_first))</tt> |
|
* corresponding to \c i and \c j respectively, then \c *j is not less than |
|
* \c *i. |
|
* |
|
* Note: \c sort_by_key is not guaranteed to be stable. That is, suppose that |
|
* \c *i and \c *j are equivalent: neither one is less than the other. It is not |
|
* guaranteed that the relative order of these two keys or the relative |
|
* order of their corresponding values will be preserved by \p sort_by_key. |
|
* |
|
* This version of \p sort_by_key compares key objects using \c operator<. |
|
* |
|
* \param keys_first The beginning of the key sequence. |
|
* \param keys_last The end of the key sequence. |
|
* \param values_first The beginning of the value sequence. |
|
* |
|
* \tparam RandomAccessIterator1 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
|
* \p RandomAccessIterator1 is mutable, |
|
* and \p RandomAccessIterator1's \c value_type is a model of <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a>, |
|
* and the ordering relation on \p RandomAccessIterator1's \c value_type is a <em>strict weak ordering</em>, as defined in the |
|
* <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a> requirements. |
|
* \tparam RandomAccessIterator2 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.hml">Random Access Iterator</a>, |
|
* and \p RandomAccessIterator2 is mutable. |
|
* |
|
* \pre The range <tt>[keys_first, keys_last))</tt> shall not overlap the range <tt>[values_first, values_first + (keys_last - keys_first))</tt>. |
|
* |
|
* The following code snippet demonstrates how to use \p sort_by_key to sort |
|
* an array of character values using integers as sorting keys. |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* ... |
|
* const int N = 6; |
|
* int keys[N] = { 1, 4, 2, 8, 5, 7}; |
|
* char values[N] = {'a', 'b', 'c', 'd', 'e', 'f'}; |
|
* thrust::sort_by_key(keys, keys + N, values); |
|
* // keys is now { 1, 2, 4, 5, 7, 8} |
|
* // values is now {'a', 'c', 'b', 'e', 'f', 'd'} |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/sort.html |
|
* \see \p stable_sort_by_key |
|
* \see \p sort |
|
*/ |
|
template<typename RandomAccessIterator1, |
|
typename RandomAccessIterator2> |
|
void sort_by_key(RandomAccessIterator1 keys_first, |
|
RandomAccessIterator1 keys_last, |
|
RandomAccessIterator2 values_first); |
|
|
|
|
|
/*! \p sort_by_key performs a key-value sort. That is, \p sort_by_key sorts the |
|
* elements in <tt>[keys_first, keys_last)</tt> and <tt>[values_first, |
|
* values_first + (keys_last - keys_first))</tt> into ascending key order, |
|
* meaning that if \c i and \c j are any two valid iterators in <tt>[keys_first, |
|
* keys_last)</tt> such that \c i precedes \c j, and \c p and \c q are iterators |
|
* in <tt>[values_first, values_first + (keys_last - keys_first))</tt> |
|
* corresponding to \c i and \c j respectively, then \c *j is not less than |
|
* \c *i. |
|
* |
|
* Note: \c sort_by_key is not guaranteed to be stable. That is, suppose that |
|
* \c *i and \c *j are equivalent: neither one is less than the other. It is not |
|
* guaranteed that the relative order of these two keys or the relative |
|
* order of their corresponding values will be preserved by \p sort_by_key. |
|
* |
|
* This version of \p sort_by_key compares key objects using a function object |
|
* \c comp. |
|
* |
|
* The algorithm's execution is parallelized as determined by \p exec. |
|
* |
|
* \param exec The execution policy to use for parallelization. |
|
* \param keys_first The beginning of the key sequence. |
|
* \param keys_last The end of the key sequence. |
|
* \param values_first The beginning of the value sequence. |
|
* \param comp Comparison operator. |
|
* |
|
* \tparam DerivedPolicy The name of the derived execution policy. |
|
* \tparam RandomAccessIterator1 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
|
* \p RandomAccessIterator1 is mutable, |
|
* and \p RandomAccessIterator1's \c value_type is convertible to \p StrictWeakOrdering's |
|
* \c first_argument_type and \c second_argument_type. |
|
* \tparam RandomAccessIterator2 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.hml">Random Access Iterator</a>, |
|
* and \p RandomAccessIterator2 is mutable. |
|
* \tparam StrictWeakOrdering is a model of <a href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">Strict Weak Ordering</a>. |
|
* |
|
* \pre The range <tt>[keys_first, keys_last))</tt> shall not overlap the range <tt>[values_first, values_first + (keys_last - keys_first))</tt>. |
|
* |
|
* The following code snippet demonstrates how to use \p sort_by_key to sort |
|
* an array of character values using integers as sorting keys using the \p thrust::host execution policy |
|
* for parallelization.The keys are sorted in descending order using the <tt>greater<int></tt> comparison operator. |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* #include <thrust/execution_policy.h> |
|
* ... |
|
* const int N = 6; |
|
* int keys[N] = { 1, 4, 2, 8, 5, 7}; |
|
* char values[N] = {'a', 'b', 'c', 'd', 'e', 'f'}; |
|
* thrust::sort_by_key(thrust::host, keys, keys + N, values, thrust::greater<int>()); |
|
* // keys is now { 8, 7, 5, 4, 2, 1} |
|
* // values is now {'d', 'f', 'e', 'b', 'c', 'a'} |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/sort.html |
|
* \see \p stable_sort_by_key |
|
* \see \p sort |
|
*/ |
|
template<typename DerivedPolicy, |
|
typename RandomAccessIterator1, |
|
typename RandomAccessIterator2, |
|
typename StrictWeakOrdering> |
|
void sort_by_key(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
|
RandomAccessIterator1 keys_first, |
|
RandomAccessIterator1 keys_last, |
|
RandomAccessIterator2 values_first, |
|
StrictWeakOrdering comp); |
|
|
|
|
|
/*! \p sort_by_key performs a key-value sort. That is, \p sort_by_key sorts the |
|
* elements in <tt>[keys_first, keys_last)</tt> and <tt>[values_first, |
|
* values_first + (keys_last - keys_first))</tt> into ascending key order, |
|
* meaning that if \c i and \c j are any two valid iterators in <tt>[keys_first, |
|
* keys_last)</tt> such that \c i precedes \c j, and \c p and \c q are iterators |
|
* in <tt>[values_first, values_first + (keys_last - keys_first))</tt> |
|
* corresponding to \c i and \c j respectively, then \c *j is not less than |
|
* \c *i. |
|
* |
|
* Note: \c sort_by_key is not guaranteed to be stable. That is, suppose that |
|
* \c *i and \c *j are equivalent: neither one is less than the other. It is not |
|
* guaranteed that the relative order of these two keys or the relative |
|
* order of their corresponding values will be preserved by \p sort_by_key. |
|
* |
|
* This version of \p sort_by_key compares key objects using a function object |
|
* \c comp. |
|
* |
|
* \param keys_first The beginning of the key sequence. |
|
* \param keys_last The end of the key sequence. |
|
* \param values_first The beginning of the value sequence. |
|
* \param comp Comparison operator. |
|
* |
|
* \tparam RandomAccessIterator1 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
|
* \p RandomAccessIterator1 is mutable, |
|
* and \p RandomAccessIterator1's \c value_type is convertible to \p StrictWeakOrdering's |
|
* \c first_argument_type and \c second_argument_type. |
|
* \tparam RandomAccessIterator2 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.hml">Random Access Iterator</a>, |
|
* and \p RandomAccessIterator2 is mutable. |
|
* \tparam StrictWeakOrdering is a model of <a href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">Strict Weak Ordering</a>. |
|
* |
|
* \pre The range <tt>[keys_first, keys_last))</tt> shall not overlap the range <tt>[values_first, values_first + (keys_last - keys_first))</tt>. |
|
* |
|
* The following code snippet demonstrates how to use \p sort_by_key to sort |
|
* an array of character values using integers as sorting keys. The keys |
|
* are sorted in descending order using the greater<int> comparison operator. |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* ... |
|
* const int N = 6; |
|
* int keys[N] = { 1, 4, 2, 8, 5, 7}; |
|
* char values[N] = {'a', 'b', 'c', 'd', 'e', 'f'}; |
|
* thrust::sort_by_key(keys, keys + N, values, thrust::greater<int>()); |
|
* // keys is now { 8, 7, 5, 4, 2, 1} |
|
* // values is now {'d', 'f', 'e', 'b', 'c', 'a'} |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/sort.html |
|
* \see \p stable_sort_by_key |
|
* \see \p sort |
|
*/ |
|
template<typename RandomAccessIterator1, |
|
typename RandomAccessIterator2, |
|
typename StrictWeakOrdering> |
|
void sort_by_key(RandomAccessIterator1 keys_first, |
|
RandomAccessIterator1 keys_last, |
|
RandomAccessIterator2 values_first, |
|
StrictWeakOrdering comp); |
|
|
|
|
|
/*! \p stable_sort_by_key performs a key-value sort. That is, \p stable_sort_by_key |
|
* sorts the elements in <tt>[keys_first, keys_last)</tt> and <tt>[values_first, |
|
* values_first + (keys_last - keys_first))</tt> into ascending key order, |
|
* meaning that if \c i and \c j are any two valid iterators in <tt>[keys_first, |
|
* keys_last)</tt> such that \c i precedes \c j, and \c p and \c q are iterators |
|
* in <tt>[values_first, values_first + (keys_last - keys_first))</tt> |
|
* corresponding to \c i and \c j respectively, then \c *j is not less than |
|
* \c *i. |
|
* |
|
* As the name suggests, \p stable_sort_by_key is stable: it preserves the |
|
* relative ordering of equivalent elements. That is, if \c x and \c y |
|
* are elements in <tt>[keys_first, keys_last)</tt> such that \c x precedes \c y, |
|
* and if the two elements are equivalent (neither <tt>x < y</tt> nor |
|
* <tt>y < x</tt>) then a postcondition of \p stable_sort_by_key is that \c x |
|
* still precedes \c y. |
|
* |
|
* This version of \p stable_sort_by_key compares key objects using \c operator<. |
|
* |
|
* The algorithm's execution is parallelized as determined by \p exec. |
|
* |
|
* \param exec The execution policy to use for parallelization. |
|
* \param keys_first The beginning of the key sequence. |
|
* \param keys_last The end of the key sequence. |
|
* \param values_first The beginning of the value sequence. |
|
* |
|
* \tparam DerivedPolicy The name of the derived execution policy. |
|
* \tparam RandomAccessIterator1 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
|
* \p RandomAccessIterator1 is mutable, |
|
* and \p RandomAccessIterator1's \c value_type is a model of <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a>, |
|
* and the ordering relation on \p RandomAccessIterator1's \c value_type is a <em>strict weak ordering</em>, as defined in the |
|
* <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a> requirements. |
|
* \tparam RandomAccessIterator2 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.hml">Random Access Iterator</a>, |
|
* and \p RandomAccessIterator2 is mutable. |
|
* |
|
* \pre The range <tt>[keys_first, keys_last))</tt> shall not overlap the range <tt>[values_first, values_first + (keys_last - keys_first))</tt>. |
|
* |
|
* The following code snippet demonstrates how to use \p stable_sort_by_key to sort |
|
* an array of characters using integers as sorting keys using the \p thrust::host execution policy for |
|
* parallelization: |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* #include <thrust/execution_policy.h> |
|
* ... |
|
* const int N = 6; |
|
* int keys[N] = { 1, 4, 2, 8, 5, 7}; |
|
* char values[N] = {'a', 'b', 'c', 'd', 'e', 'f'}; |
|
* thrust::stable_sort_by_key(thrust::host, keys, keys + N, values); |
|
* // keys is now { 1, 2, 4, 5, 7, 8} |
|
* // values is now {'a', 'c', 'b', 'e', 'f', 'd'} |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/sort.html |
|
* \see \p sort_by_key |
|
* \see \p stable_sort |
|
*/ |
|
template<typename DerivedPolicy, |
|
typename RandomAccessIterator1, |
|
typename RandomAccessIterator2> |
|
void stable_sort_by_key(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
|
RandomAccessIterator1 keys_first, |
|
RandomAccessIterator1 keys_last, |
|
RandomAccessIterator2 values_first); |
|
|
|
|
|
/*! \p stable_sort_by_key performs a key-value sort. That is, \p stable_sort_by_key |
|
* sorts the elements in <tt>[keys_first, keys_last)</tt> and <tt>[values_first, |
|
* values_first + (keys_last - keys_first))</tt> into ascending key order, |
|
* meaning that if \c i and \c j are any two valid iterators in <tt>[keys_first, |
|
* keys_last)</tt> such that \c i precedes \c j, and \c p and \c q are iterators |
|
* in <tt>[values_first, values_first + (keys_last - keys_first))</tt> |
|
* corresponding to \c i and \c j respectively, then \c *j is not less than |
|
* \c *i. |
|
* |
|
* As the name suggests, \p stable_sort_by_key is stable: it preserves the |
|
* relative ordering of equivalent elements. That is, if \c x and \c y |
|
* are elements in <tt>[keys_first, keys_last)</tt> such that \c x precedes \c y, |
|
* and if the two elements are equivalent (neither <tt>x < y</tt> nor |
|
* <tt>y < x</tt>) then a postcondition of \p stable_sort_by_key is that \c x |
|
* still precedes \c y. |
|
* |
|
* This version of \p stable_sort_by_key compares key objects using \c operator<. |
|
* |
|
* \param keys_first The beginning of the key sequence. |
|
* \param keys_last The end of the key sequence. |
|
* \param values_first The beginning of the value sequence. |
|
* |
|
* \tparam RandomAccessIterator1 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
|
* \p RandomAccessIterator1 is mutable, |
|
* and \p RandomAccessIterator1's \c value_type is a model of <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a>, |
|
* and the ordering relation on \p RandomAccessIterator1's \c value_type is a <em>strict weak ordering</em>, as defined in the |
|
* <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a> requirements. |
|
* \tparam RandomAccessIterator2 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.hml">Random Access Iterator</a>, |
|
* and \p RandomAccessIterator2 is mutable. |
|
* |
|
* \pre The range <tt>[keys_first, keys_last))</tt> shall not overlap the range <tt>[values_first, values_first + (keys_last - keys_first))</tt>. |
|
* |
|
* The following code snippet demonstrates how to use \p stable_sort_by_key to sort |
|
* an array of characters using integers as sorting keys. |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* ... |
|
* const int N = 6; |
|
* int keys[N] = { 1, 4, 2, 8, 5, 7}; |
|
* char values[N] = {'a', 'b', 'c', 'd', 'e', 'f'}; |
|
* thrust::stable_sort_by_key(keys, keys + N, values); |
|
* // keys is now { 1, 2, 4, 5, 7, 8} |
|
* // values is now {'a', 'c', 'b', 'e', 'f', 'd'} |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/sort.html |
|
* \see \p sort_by_key |
|
* \see \p stable_sort |
|
*/ |
|
template<typename RandomAccessIterator1, |
|
typename RandomAccessIterator2> |
|
void stable_sort_by_key(RandomAccessIterator1 keys_first, |
|
RandomAccessIterator1 keys_last, |
|
RandomAccessIterator2 values_first); |
|
|
|
|
|
/*! \p stable_sort_by_key performs a key-value sort. That is, \p stable_sort_by_key |
|
* sorts the elements in <tt>[keys_first, keys_last)</tt> and <tt>[values_first, |
|
* values_first + (keys_last - keys_first))</tt> into ascending key order, |
|
* meaning that if \c i and \c j are any two valid iterators in <tt>[keys_first, |
|
* keys_last)</tt> such that \c i precedes \c j, and \c p and \c q are iterators |
|
* in <tt>[values_first, values_first + (keys_last - keys_first))</tt> |
|
* corresponding to \c i and \c j respectively, then \c *j is not less than |
|
* \c *i. |
|
* |
|
* As the name suggests, \p stable_sort_by_key is stable: it preserves the |
|
* relative ordering of equivalent elements. That is, if \c x and \c y |
|
* are elements in <tt>[keys_first, keys_last)</tt> such that \c x precedes \c y, |
|
* and if the two elements are equivalent (neither <tt>x < y</tt> nor |
|
* <tt>y < x</tt>) then a postcondition of \p stable_sort_by_key is that \c x |
|
* still precedes \c y. |
|
* |
|
* This version of \p stable_sort_by_key compares key objects using the function |
|
* object \p comp. |
|
* |
|
* The algorithm's execution is parallelized as determined by \p exec. |
|
* |
|
* \param exec The execution policy to use for parallelization. |
|
* \param keys_first The beginning of the key sequence. |
|
* \param keys_last The end of the key sequence. |
|
* \param values_first The beginning of the value sequence. |
|
* \param comp Comparison operator. |
|
* |
|
* \tparam DerivedPolicy The name of the derived execution policy. |
|
* \tparam RandomAccessIterator1 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
|
* \p RandomAccessIterator1 is mutable, |
|
* and \p RandomAccessIterator1's \c value_type is convertible to \p StrictWeakOrdering's |
|
* \c first_argument_type and \c second_argument_type. |
|
* \tparam RandomAccessIterator2 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.hml">Random Access Iterator</a>, |
|
* and \p RandomAccessIterator2 is mutable. |
|
* \tparam StrictWeakOrdering is a model of <a href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">Strict Weak Ordering</a>. |
|
* |
|
* \pre The range <tt>[keys_first, keys_last))</tt> shall not overlap the range <tt>[values_first, values_first + (keys_last - keys_first))</tt>. |
|
* |
|
* The following code snippet demonstrates how to use \p sort_by_key to sort |
|
* an array of character values using integers as sorting keys using the \p thrust::host execution policy for |
|
* parallelization. The keys are sorted in descending order using the <tt>greater<int></tt> comparison operator. |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* #include <thrust/execution_policy.h> |
|
* ... |
|
* const int N = 6; |
|
* int keys[N] = { 1, 4, 2, 8, 5, 7}; |
|
* char values[N] = {'a', 'b', 'c', 'd', 'e', 'f'}; |
|
* thrust::stable_sort_by_key(thrust::host, keys, keys + N, values, thrust::greater<int>()); |
|
* // keys is now { 8, 7, 5, 4, 2, 1} |
|
* // values is now {'d', 'f', 'e', 'b', 'c', 'a'} |
|
* \endcode |
|
* |
|
* |
|
* \see http://www.sgi.com/tech/stl/sort.html |
|
* \see \p sort_by_key |
|
* \see \p stable_sort |
|
*/ |
|
template<typename DerivedPolicy, |
|
typename RandomAccessIterator1, |
|
typename RandomAccessIterator2, |
|
typename StrictWeakOrdering> |
|
void stable_sort_by_key(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
|
RandomAccessIterator1 keys_first, |
|
RandomAccessIterator1 keys_last, |
|
RandomAccessIterator2 values_first, |
|
StrictWeakOrdering comp); |
|
|
|
|
|
/*! \p stable_sort_by_key performs a key-value sort. That is, \p stable_sort_by_key |
|
* sorts the elements in <tt>[keys_first, keys_last)</tt> and <tt>[values_first, |
|
* values_first + (keys_last - keys_first))</tt> into ascending key order, |
|
* meaning that if \c i and \c j are any two valid iterators in <tt>[keys_first, |
|
* keys_last)</tt> such that \c i precedes \c j, and \c p and \c q are iterators |
|
* in <tt>[values_first, values_first + (keys_last - keys_first))</tt> |
|
* corresponding to \c i and \c j respectively, then \c *j is not less than |
|
* \c *i. |
|
* |
|
* As the name suggests, \p stable_sort_by_key is stable: it preserves the |
|
* relative ordering of equivalent elements. That is, if \c x and \c y |
|
* are elements in <tt>[keys_first, keys_last)</tt> such that \c x precedes \c y, |
|
* and if the two elements are equivalent (neither <tt>x < y</tt> nor |
|
* <tt>y < x</tt>) then a postcondition of \p stable_sort_by_key is that \c x |
|
* still precedes \c y. |
|
* |
|
* This version of \p stable_sort_by_key compares key objects using the function |
|
* object \p comp. |
|
* |
|
* \param keys_first The beginning of the key sequence. |
|
* \param keys_last The end of the key sequence. |
|
* \param values_first The beginning of the value sequence. |
|
* \param comp Comparison operator. |
|
* |
|
* \tparam RandomAccessIterator1 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>, |
|
* \p RandomAccessIterator1 is mutable, |
|
* and \p RandomAccessIterator1's \c value_type is convertible to \p StrictWeakOrdering's |
|
* \c first_argument_type and \c second_argument_type. |
|
* \tparam RandomAccessIterator2 is a model of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.hml">Random Access Iterator</a>, |
|
* and \p RandomAccessIterator2 is mutable. |
|
* \tparam StrictWeakOrdering is a model of <a href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">Strict Weak Ordering</a>. |
|
* |
|
* \pre The range <tt>[keys_first, keys_last))</tt> shall not overlap the range <tt>[values_first, values_first + (keys_last - keys_first))</tt>. |
|
* |
|
* The following code snippet demonstrates how to use \p sort_by_key to sort |
|
* an array of character values using integers as sorting keys. The keys |
|
* are sorted in descending order using the greater<int> comparison operator. |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* ... |
|
* const int N = 6; |
|
* int keys[N] = { 1, 4, 2, 8, 5, 7}; |
|
* char values[N] = {'a', 'b', 'c', 'd', 'e', 'f'}; |
|
* thrust::stable_sort_by_key(keys, keys + N, values, thrust::greater<int>()); |
|
* // keys is now { 8, 7, 5, 4, 2, 1} |
|
* // values is now {'d', 'f', 'e', 'b', 'c', 'a'} |
|
* \endcode |
|
* |
|
* |
|
* \see http://www.sgi.com/tech/stl/sort.html |
|
* \see \p sort_by_key |
|
* \see \p stable_sort |
|
*/ |
|
template<typename RandomAccessIterator1, |
|
typename RandomAccessIterator2, |
|
typename StrictWeakOrdering> |
|
void stable_sort_by_key(RandomAccessIterator1 keys_first, |
|
RandomAccessIterator1 keys_last, |
|
RandomAccessIterator2 values_first, |
|
StrictWeakOrdering comp); |
|
|
|
|
|
/*! \} // end sorting |
|
*/ |
|
|
|
|
|
/*! \addtogroup reductions |
|
* \{ |
|
* \addtogroup predicates |
|
* \{ |
|
*/ |
|
|
|
|
|
/*! \p is_sorted returns \c true if the range <tt>[first, last)</tt> is |
|
* sorted in ascending order, and \c false otherwise. |
|
* |
|
* Specifically, this version of \p is_sorted returns \c false if for |
|
* some iterator \c i in the range <tt>[first, last - 1)</tt> the |
|
* expression <tt>*(i + 1) < *i</tt> is \c true. |
|
* |
|
* The algorithm's execution is parallelized as determined by \p exec. |
|
* |
|
* \param exec The execution policy to use for parallelization. |
|
* \param first The beginning of the sequence. |
|
* \param last The end of the sequence. |
|
* \return \c true, if the sequence is sorted; \c false, otherwise. |
|
* |
|
* \tparam DerivedPolicy The name of the derived execution policy. |
|
* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a>, |
|
* \p ForwardIterator's \c value_type is a model of <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a>, |
|
* and the ordering on objects of \p ForwardIterator's \c value_type is a <em>strict weak ordering</em>, as defined |
|
* in the <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a> requirements. |
|
* |
|
* |
|
* The following code demonstrates how to use \p is_sorted to test whether the |
|
* contents of a \c device_vector are stored in ascending order using the \p thrust::device execution policy |
|
* for parallelization: |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* #include <thrust/device_vector.h> |
|
* #include <thrust/sort.h> |
|
* #include <thrust/execution_policy.h> |
|
* ... |
|
* thrust::device_vector<int> v(6); |
|
* v[0] = 1; |
|
* v[1] = 4; |
|
* v[2] = 2; |
|
* v[3] = 8; |
|
* v[4] = 5; |
|
* v[5] = 7; |
|
* |
|
* bool result = thrust::is_sorted(thrust::device, v.begin(), v.end()); |
|
* |
|
* // result == false |
|
* |
|
* thrust::sort(v.begin(), v.end()); |
|
* result = thrust::is_sorted(thrust::device, v.begin(), v.end()); |
|
* |
|
* // result == true |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/is_sorted.html |
|
* \see is_sorted_until |
|
* \see \c sort |
|
* \see \c stable_sort |
|
* \see \c less<T> |
|
*/ |
|
template<typename DerivedPolicy, typename ForwardIterator> |
|
bool is_sorted(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
|
ForwardIterator first, |
|
ForwardIterator last); |
|
|
|
|
|
/*! \p is_sorted returns \c true if the range <tt>[first, last)</tt> is |
|
* sorted in ascending order, and \c false otherwise. |
|
* |
|
* Specifically, this version of \p is_sorted returns \c false if for |
|
* some iterator \c i in the range <tt>[first, last - 1)</tt> the |
|
* expression <tt>*(i + 1) < *i</tt> is \c true. |
|
* |
|
* \param first The beginning of the sequence. |
|
* \param last The end of the sequence. |
|
* \return \c true, if the sequence is sorted; \c false, otherwise. |
|
* |
|
* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a>, |
|
* \p ForwardIterator's \c value_type is a model of <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a>, |
|
* and the ordering on objects of \p ForwardIterator's \c value_type is a <em>strict weak ordering</em>, as defined |
|
* in the <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a> requirements. |
|
* |
|
* |
|
* The following code demonstrates how to use \p is_sorted to test whether the |
|
* contents of a \c device_vector are stored in ascending order. |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* #include <thrust/device_vector.h> |
|
* #include <thrust/sort.h> |
|
* ... |
|
* thrust::device_vector<int> v(6); |
|
* v[0] = 1; |
|
* v[1] = 4; |
|
* v[2] = 2; |
|
* v[3] = 8; |
|
* v[4] = 5; |
|
* v[5] = 7; |
|
* |
|
* bool result = thrust::is_sorted(v.begin(), v.end()); |
|
* |
|
* // result == false |
|
* |
|
* thrust::sort(v.begin(), v.end()); |
|
* result = thrust::is_sorted(v.begin(), v.end()); |
|
* |
|
* // result == true |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/is_sorted.html |
|
* \see is_sorted_until |
|
* \see \c sort |
|
* \see \c stable_sort |
|
* \see \c less<T> |
|
*/ |
|
template<typename ForwardIterator> |
|
bool is_sorted(ForwardIterator first, |
|
ForwardIterator last); |
|
|
|
|
|
/*! \p is_sorted returns \c true if the range <tt>[first, last)</tt> is sorted in ascending |
|
* order accoring to a user-defined comparison operation, and \c false otherwise. |
|
* |
|
* Specifically, this version of \p is_sorted returns \c false if for some iterator \c i in |
|
* the range <tt>[first, last - 1)</tt> the expression <tt>comp(*(i + 1), *i)</tt> is \c true. |
|
* |
|
* The algorithm's execution is parallelized as determined by \p exec. |
|
* |
|
* \param exec The execution policy to use for parallelization. |
|
* \param first The beginning of the sequence. |
|
* \param last The end of the sequence. |
|
* \param comp Comparison operator. |
|
* \return \c true, if the sequence is sorted according to comp; \c false, otherwise. |
|
* |
|
* \tparam DerivedPolicy The name of the derived execution policy. |
|
* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a>, |
|
* and \p ForwardIterator's \c value_type is convertible to both \c StrictWeakOrdering's \c first_argument_type |
|
* and \c second_argument_type. |
|
* \tparam Compare is a model of <a href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">Strict Weak Ordering</a>. |
|
* |
|
* The following code snippet demonstrates how to use \p is_sorted to test whether the |
|
* contents of a \c device_vector are stored in descending order using the \p thrust::device execution |
|
* policy for parallelization: |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* #include <thrust/functional.h> |
|
* #include <thrust/device_vector.h> |
|
* #include <thrust/execution_policy.h> |
|
* ... |
|
* thrust::device_vector<int> v(6); |
|
* v[0] = 1; |
|
* v[1] = 4; |
|
* v[2] = 2; |
|
* v[3] = 8; |
|
* v[4] = 5; |
|
* v[5] = 7; |
|
* |
|
* thrust::greater<int> comp; |
|
* bool result = thrust::is_sorted(thrust::device, v.begin(), v.end(), comp); |
|
* |
|
* // result == false |
|
* |
|
* thrust::sort(v.begin(), v.end(), comp); |
|
* result = thrust::is_sorted(thrust::device, v.begin(), v.end(), comp); |
|
* |
|
* // result == true |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/is_sorted.html |
|
* \see \c sort |
|
* \see \c stable_sort |
|
* \see \c less<T> |
|
*/ |
|
template<typename DerivedPolicy, typename ForwardIterator, typename Compare> |
|
bool is_sorted(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
|
ForwardIterator first, |
|
ForwardIterator last, |
|
Compare comp); |
|
|
|
|
|
/*! \p is_sorted returns \c true if the range <tt>[first, last)</tt> is sorted in ascending |
|
* order accoring to a user-defined comparison operation, and \c false otherwise. |
|
* |
|
* Specifically, this version of \p is_sorted returns \c false if for some iterator \c i in |
|
* the range <tt>[first, last - 1)</tt> the expression <tt>comp(*(i + 1), *i)</tt> is \c true. |
|
* |
|
* \param first The beginning of the sequence. |
|
* \param last The end of the sequence. |
|
* \param comp Comparison operator. |
|
* \return \c true, if the sequence is sorted according to comp; \c false, otherwise. |
|
* |
|
* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a>, |
|
* and \p ForwardIterator's \c value_type is convertible to both \c StrictWeakOrdering's \c first_argument_type |
|
* and \c second_argument_type. |
|
* \tparam Compare is a model of <a href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">Strict Weak Ordering</a>. |
|
* |
|
* The following code snippet demonstrates how to use \p is_sorted to test whether the |
|
* contents of a \c device_vector are stored in descending order. |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* #include <thrust/functional.h> |
|
* #include <thrust/device_vector.h> |
|
* ... |
|
* thrust::device_vector<int> v(6); |
|
* v[0] = 1; |
|
* v[1] = 4; |
|
* v[2] = 2; |
|
* v[3] = 8; |
|
* v[4] = 5; |
|
* v[5] = 7; |
|
* |
|
* thrust::greater<int> comp; |
|
* bool result = thrust::is_sorted(v.begin(), v.end(), comp); |
|
* |
|
* // result == false |
|
* |
|
* thrust::sort(v.begin(), v.end(), comp); |
|
* result = thrust::is_sorted(v.begin(), v.end(), comp); |
|
* |
|
* // result == true |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/is_sorted.html |
|
* \see \c sort |
|
* \see \c stable_sort |
|
* \see \c less<T> |
|
*/ |
|
template<typename ForwardIterator, typename Compare> |
|
bool is_sorted(ForwardIterator first, |
|
ForwardIterator last, |
|
Compare comp); |
|
|
|
|
|
/*! This version of \p is_sorted_until returns the last iterator \c i in <tt>[first,last]</tt> for |
|
* which the range <tt>[first,last)</tt> is sorted using \c operator<. If <tt>distance(first,last) < 2</tt>, |
|
* \p is_sorted_until simply returns \p last. |
|
* |
|
* The algorithm's execution is parallelized as determined by \p exec. |
|
* |
|
* \param exec The execution policy to use for parallelization. |
|
* \param first The beginning of the range of interest. |
|
* \param last The end of the range of interest. |
|
* \return The last iterator in the input range for which it is sorted. |
|
* |
|
* \tparam DerivedPolicy The name of the derived execution policy. |
|
* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a> and |
|
* \p ForwardIterator's \c value_type is a model of <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a>. |
|
* |
|
* The following code snippet demonstrates how to use \p is_sorted_until to find the first position |
|
* in an array where the data becomes unsorted using the \p thrust::host execution policy for |
|
* parallelization: |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* #include <thrust/execution_policy.h> |
|
* |
|
* ... |
|
* |
|
* int A[8] = {0, 1, 2, 3, 0, 1, 2, 3}; |
|
* |
|
* int * B = thrust::is_sorted_until(thrust::host, A, A + 8); |
|
* |
|
* // B - A is 4 |
|
* // [A, B) is sorted |
|
* \endcode |
|
* |
|
* \see \p is_sorted |
|
* \see \p sort |
|
* \see \p sort_by_key |
|
* \see \p stable_sort |
|
* \see \p stable_sort_by_key |
|
*/ |
|
template<typename DerivedPolicy, typename ForwardIterator> |
|
ForwardIterator is_sorted_until(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
|
ForwardIterator first, |
|
ForwardIterator last); |
|
|
|
|
|
/*! This version of \p is_sorted_until returns the last iterator \c i in <tt>[first,last]</tt> for |
|
* which the range <tt>[first,last)</tt> is sorted using \c operator<. If <tt>distance(first,last) < 2</tt>, |
|
* \p is_sorted_until simply returns \p last. |
|
* |
|
* \param first The beginning of the range of interest. |
|
* \param last The end of the range of interest. |
|
* \return The last iterator in the input range for which it is sorted. |
|
* |
|
* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a> and |
|
* \p ForwardIterator's \c value_type is a model of <a href="http://www.sgi.com/tech/stl/LessThanComparable.html">LessThan Comparable</a>. |
|
* |
|
* The following code snippet demonstrates how to use \p is_sorted_until to find the first position |
|
* in an array where the data becomes unsorted: |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* |
|
* ... |
|
* |
|
* int A[8] = {0, 1, 2, 3, 0, 1, 2, 3}; |
|
* |
|
* int * B = thrust::is_sorted_until(A, A + 8); |
|
* |
|
* // B - A is 4 |
|
* // [A, B) is sorted |
|
* \endcode |
|
* |
|
* \see \p is_sorted |
|
* \see \p sort |
|
* \see \p sort_by_key |
|
* \see \p stable_sort |
|
* \see \p stable_sort_by_key |
|
*/ |
|
template<typename ForwardIterator> |
|
ForwardIterator is_sorted_until(ForwardIterator first, |
|
ForwardIterator last); |
|
|
|
|
|
/*! This version of \p is_sorted_until returns the last iterator \c i in <tt>[first,last]</tt> for |
|
* which the range <tt>[first,last)</tt> is sorted using the function object \c comp. If <tt>distance(first,last) < 2</tt>, |
|
* \p is_sorted_until simply returns \p last. |
|
* |
|
* The algorithm's execution is parallelized as determined by \p exec. |
|
* |
|
* \param exec The execution policy to use for parallelization: |
|
* \param first The beginning of the range of interest. |
|
* \param last The end of the range of interest. |
|
* \param comp The function object to use for comparison. |
|
* \return The last iterator in the input range for which it is sorted. |
|
* |
|
* \tparam DerivedPolicy The name of the derived execution policy. |
|
* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a> and |
|
* \p ForwardIterator's \c value_type is convertible to \p Compare's \c argument_type. |
|
* \tparam Compare is a model of <a href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">Strict Weak Ordering</a>. |
|
* |
|
* The following code snippet demonstrates how to use \p is_sorted_until to find the first position |
|
* in an array where the data becomes unsorted in descending order using the \p thrust::host execution |
|
* policy for parallelization: |
|
* |
|
* \code |
|
* #include <thrust/sort.h> |
|
* #include <thrust/functional.h> |
|
* #include <thrust/execution_policy.h> |
|
* |
|
* ... |
|
* |
|
* int A[8] = {3, 2, 1, 0, 3, 2, 1, 0}; |
|
* |
|
* thrust::greater<int> comp; |
|
* int * B = thrust::is_sorted_until(thrust::host, A, A + 8, comp); |
|
* |
|
* // B - A is 4 |
|
* // [A, B) is sorted in descending order |
|
* \endcode |
|
* |
|
* \see \p is_sorted |
|
* \see \p sort |
|
* \see \p sort_by_key |
|
* \see \p stable_sort |
|
* \see \p stable_sort_by_key |
|
*/ |
|
template<typename DerivedPolicy, typename ForwardIterator, typename Compare> |
|
ForwardIterator is_sorted_until(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
|
ForwardIterator first, |
|
ForwardIterator last, |
|
Compare comp); |
|
|
|
|
|
/*! This version of \p is_sorted_until returns the last iterator \c i in <tt>[first,last]</tt> for |
|
* which the range <tt>[first,last)</tt> is sorted using the function object \c comp. If <tt>distance(first,last) < 2</tt>, |
|
* \p is_sorted_until simply returns \p last. |
|
* |
|
* \param first The beginning of the range of interest. |
|
* \param last The end of the range of interest. |
|
* \param comp The function object to use for comparison. |
|
* \return The last iterator in the input range for which it is sorted. |
|
* |
|
* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a> and |
|
* \p ForwardIterator's \c value_type is convertible to \p Compare's \c argument_type. |
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* \tparam Compare is a model of <a href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">Strict Weak Ordering</a>. |
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* |
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* The following code snippet demonstrates how to use \p is_sorted_until to find the first position |
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* in an array where the data becomes unsorted in descending order: |
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* |
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* \code |
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* #include <thrust/sort.h> |
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* #include <thrust/functional.h> |
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* |
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* ... |
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* |
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* int A[8] = {3, 2, 1, 0, 3, 2, 1, 0}; |
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* |
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* thrust::greater<int> comp; |
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* int * B = thrust::is_sorted_until(A, A + 8, comp); |
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* |
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* // B - A is 4 |
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* // [A, B) is sorted in descending order |
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* \endcode |
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* |
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* \see \p is_sorted |
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* \see \p sort |
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* \see \p sort_by_key |
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* \see \p stable_sort |
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* \see \p stable_sort_by_key |
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*/ |
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template<typename ForwardIterator, typename Compare> |
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ForwardIterator is_sorted_until(ForwardIterator first, |
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ForwardIterator last, |
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Compare comp); |
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/*! \} // end predicates |
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* \} // end reductions |
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*/ |
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} // end namespace thrust |
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#include <thrust/detail/sort.inl> |
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