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817 lines
32 KiB
817 lines
32 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 replace.h |
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* \brief Functions for replacing elements in a range with a particular value |
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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 transformations |
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* \addtogroup replacing |
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* \ingroup transformations |
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* \{ |
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*/ |
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/*! \p replace replaces every element in the range [first, last) equal to \p old_value |
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* with \p new_value. That is: for every iterator \c i, if <tt>*i == old_value</tt> |
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* then it performs the <tt>assignment *i = new_value</tt>. |
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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 of interest. |
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* \param last The end of the sequence of interest. |
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* \param old_value The value to replace. |
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* \param new_value The new value to replace \p old_value. |
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* |
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* \tparam DerivedPolicy The name of the derived execution policy. |
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* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a>, |
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* and \p ForwardIterator is mutable. |
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* \tparam T is a model of <a href="http://www.sgi.com/tech/stl/Assignable.html>Assignable.html">Assignable</a>, |
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* \p T is a model of <a href="http://www.sgi.com/tech/stl/EqualityComparable.html">EqualityComparable</a>, |
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* objects of \p T may be compared for equality with objects of |
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* \p ForwardIterator's \c value_type, |
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* and \p T is convertible to \p ForwardIterator's \c value_type. |
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* |
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* The following code snippet demonstrates how to use \p replace to replace |
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* a value of interest in a \c device_vector with another using the \p thrust::device |
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* execution policy for parallelization: |
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* |
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* \code |
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* #include <thrust/replace.h> |
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* #include <thrust/device_vector.h> |
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* #include <thrust/execution_policy.h> |
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* |
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* ... |
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* |
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* thrust::device_vector<int> A(4); |
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* A[0] = 1; |
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* A[1] = 2; |
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* A[2] = 3; |
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* A[3] = 1; |
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* |
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* thrust::replace(thrust::device, A.begin(), A.end(), 1, 99); |
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* |
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* // A contains [99, 2, 3, 99] |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/replace.html |
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* \see \c replace_if |
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* \see \c replace_copy |
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* \see \c replace_copy_if |
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*/ |
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template<typename DerivedPolicy, typename ForwardIterator, typename T> |
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void replace(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
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ForwardIterator first, ForwardIterator last, |
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const T &old_value, |
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const T &new_value); |
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/*! \p replace replaces every element in the range [first, last) equal to \p old_value |
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* with \p new_value. That is: for every iterator \c i, if <tt>*i == old_value</tt> |
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* then it performs the <tt>assignment *i = new_value</tt>. |
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* |
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* \param first The beginning of the sequence of interest. |
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* \param last The end of the sequence of interest. |
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* \param old_value The value to replace. |
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* \param new_value The new value to replace \p old_value. |
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* |
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* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a>, |
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* and \p ForwardIterator is mutable. |
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* \tparam T is a model of <a href="http://www.sgi.com/tech/stl/Assignable.html>Assignable.html">Assignable</a>, |
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* \p T is a model of <a href="http://www.sgi.com/tech/stl/EqualityComparable.html">EqualityComparable</a>, |
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* objects of \p T may be compared for equality with objects of |
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* \p ForwardIterator's \c value_type, |
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* and \p T is convertible to \p ForwardIterator's \c value_type. |
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* |
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* The following code snippet demonstrates how to use \p replace to replace |
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* a value of interest in a \c device_vector with another. |
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* |
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* \code |
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* #include <thrust/replace.h> |
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* #include <thrust/device_vector.h> |
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* |
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* ... |
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* |
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* thrust::device_vector<int> A(4); |
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* A[0] = 1; |
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* A[1] = 2; |
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* A[2] = 3; |
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* A[3] = 1; |
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* |
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* thrust::replace(A.begin(), A.end(), 1, 99); |
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* |
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* // A contains [99, 2, 3, 99] |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/replace.html |
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* \see \c replace_if |
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* \see \c replace_copy |
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* \see \c replace_copy_if |
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*/ |
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template<typename ForwardIterator, typename T> |
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void replace(ForwardIterator first, ForwardIterator last, const T &old_value, |
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const T &new_value); |
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/*! \p replace_if replaces every element in the range <tt>[first, last)</tt> for which |
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* \p pred returns \c true with \p new_value. That is: for every iterator \c i, if |
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* <tt>pred(*i)</tt> is \c true then it performs the assignment <tt>*i = new_value</tt>. |
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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 of interest. |
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* \param last The end of the sequence of interest. |
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* \param pred The predicate to test on every value of the range <tt>[first,last)</tt>. |
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* \param new_value The new value to replace elements which <tt>pred(*i)</tt> evaluates |
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* to \c true. |
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* |
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* \tparam DerivedPolicy The name of the derived execution policy. |
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* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a>, |
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* \p ForwardIterator is mutable, |
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* and \p ForwardIterator's \c value_type is convertible to \p Predicate's \c argument_type. |
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* \tparam Predicate is a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>. |
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* \tparam T is a model of <a href="http://www.sgi.com/tech/stl/Assignable.html">Assignable</a>, |
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* and \p T is convertible to \p ForwardIterator's \c value_type. |
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* |
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* The following code snippet demonstrates how to use \p replace_if to replace |
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* a \c device_vector's negative elements with \c 0 using the \p thrust::device execution policy |
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* for parallelization: |
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* |
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* \code |
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* #include <thrust/replace.h> |
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* #include <thrust/device_vector.h> |
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* #include <thrust/execution_policy.h> |
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* ... |
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* struct is_less_than_zero |
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* { |
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* __host__ __device__ |
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* bool operator()(int x) |
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* { |
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* return x < 0; |
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* } |
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* }; |
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* |
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* ... |
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* |
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* thrust::device_vector<int> A(4); |
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* A[0] = 1; |
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* A[1] = -3; |
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* A[2] = 2; |
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* A[3] = -1; |
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* |
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* is_less_than_zero pred; |
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* |
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* thrust::replace_if(thrust::device, A.begin(), A.end(), pred, 0); |
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* |
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* // A contains [1, 0, 2, 0] |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/replace_if.html |
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* \see \c replace |
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* \see \c replace_copy |
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* \see \c replace_copy_if |
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*/ |
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template<typename DerivedPolicy, typename ForwardIterator, typename Predicate, typename T> |
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void replace_if(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
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ForwardIterator first, ForwardIterator last, |
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Predicate pred, |
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const T &new_value); |
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/*! \p replace_if replaces every element in the range <tt>[first, last)</tt> for which |
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* \p pred returns \c true with \p new_value. That is: for every iterator \c i, if |
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* <tt>pred(*i)</tt> is \c true then it performs the assignment <tt>*i = new_value</tt>. |
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* |
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* \param first The beginning of the sequence of interest. |
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* \param last The end of the sequence of interest. |
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* \param pred The predicate to test on every value of the range <tt>[first,last)</tt>. |
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* \param new_value The new value to replace elements which <tt>pred(*i)</tt> evaluates |
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* to \c true. |
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* |
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* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a>, |
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* \p ForwardIterator is mutable, |
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* and \p ForwardIterator's \c value_type is convertible to \p Predicate's \c argument_type. |
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* \tparam Predicate is a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>. |
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* \tparam T is a model of <a href="http://www.sgi.com/tech/stl/Assignable.html">Assignable</a>, |
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* and \p T is convertible to \p ForwardIterator's \c value_type. |
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* |
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* The following code snippet demonstrates how to use \p replace_if to replace |
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* a \c device_vector's negative elements with \c 0. |
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* |
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* \code |
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* #include <thrust/replace.h> |
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* #include <thrust/device_vector.h> |
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* ... |
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* struct is_less_than_zero |
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* { |
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* __host__ __device__ |
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* bool operator()(int x) |
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* { |
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* return x < 0; |
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* } |
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* }; |
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* |
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* ... |
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* |
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* thrust::device_vector<int> A(4); |
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* A[0] = 1; |
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* A[1] = -3; |
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* A[2] = 2; |
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* A[3] = -1; |
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* |
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* is_less_than_zero pred; |
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* |
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* thrust::replace_if(A.begin(), A.end(), pred, 0); |
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* |
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* // A contains [1, 0, 2, 0] |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/replace_if.html |
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* \see \c replace |
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* \see \c replace_copy |
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* \see \c replace_copy_if |
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*/ |
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template<typename ForwardIterator, typename Predicate, typename T> |
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void replace_if(ForwardIterator first, ForwardIterator last, |
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Predicate pred, |
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const T &new_value); |
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/*! \p replace_if replaces every element in the range <tt>[first, last)</tt> for which |
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* <tt>pred(*s)</tt> returns \c true with \p new_value. That is: for every iterator |
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* \c i in the range <tt>[first, last)</tt>, and \c s in the range <tt>[stencil, stencil + (last - first))</tt>, |
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* if <tt>pred(*s)</tt> is \c true then it performs the assignment <tt>*i = new_value</tt>. |
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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 of interest. |
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* \param last The end of the sequence of interest. |
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* \param stencil The beginning of the stencil sequence. |
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* \param pred The predicate to test on every value of the range <tt>[first,last)</tt>. |
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* \param new_value The new value to replace elements which <tt>pred(*i)</tt> evaluates |
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* to \c true. |
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* |
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* \tparam DerivedPolicy The name of the derived execution policy. |
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* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a>, |
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* and \p ForwardIterator is mutable. |
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* \tparam InputIterator is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>, |
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* and \p InputIterator's \c value_type is convertible to \p Predicate's \c argument_type. |
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* \tparam Predicate is a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>. |
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* \tparam T is a model of <a href="http://www.sgi.com/tech/stl/Assignable.html">Assignable</a>, |
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* and \p T is convertible to \p ForwardIterator's \c value_type. |
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* |
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* The following code snippet demonstrates how to use \p replace_if to replace |
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* a \c device_vector's element with \c 0 when its corresponding stencil element is less than zero |
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* using the \p thrust::device execution policy for parallelization: |
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* |
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* \code |
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* #include <thrust/replace.h> |
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* #include <thrust/device_vector.h> |
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* #include <thrust/execution_policy.h> |
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* |
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* struct is_less_than_zero |
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* { |
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* __host__ __device__ |
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* bool operator()(int x) |
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* { |
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* return x < 0; |
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* } |
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* }; |
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* |
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* ... |
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* |
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* thrust::device_vector<int> A(4); |
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* A[0] = 10; |
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* A[1] = 20; |
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* A[2] = 30; |
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* A[3] = 40; |
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* |
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* thrust::device_vector<int> S(4); |
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* S[0] = -1; |
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* S[1] = 0; |
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* S[2] = -1; |
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* S[3] = 0; |
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* |
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* is_less_than_zero pred; |
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* thrust::replace_if(thrust::device, A.begin(), A.end(), S.begin(), pred, 0); |
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* |
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* // A contains [0, 20, 0, 40] |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/replace_if.html |
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* \see \c replace |
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* \see \c replace_copy |
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* \see \c replace_copy_if |
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*/ |
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template<typename DerivedPolicy, typename ForwardIterator, typename InputIterator, typename Predicate, typename T> |
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void replace_if(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
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ForwardIterator first, ForwardIterator last, |
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InputIterator stencil, |
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Predicate pred, |
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const T &new_value); |
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|
|
|
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/*! \p replace_if replaces every element in the range <tt>[first, last)</tt> for which |
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* <tt>pred(*s)</tt> returns \c true with \p new_value. That is: for every iterator |
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* \c i in the range <tt>[first, last)</tt>, and \c s in the range <tt>[stencil, stencil + (last - first))</tt>, |
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* if <tt>pred(*s)</tt> is \c true then it performs the assignment <tt>*i = new_value</tt>. |
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* |
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* \param first The beginning of the sequence of interest. |
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* \param last The end of the sequence of interest. |
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* \param stencil The beginning of the stencil sequence. |
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* \param pred The predicate to test on every value of the range <tt>[first,last)</tt>. |
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* \param new_value The new value to replace elements which <tt>pred(*i)</tt> evaluates |
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* to \c true. |
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* |
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* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a>, |
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* and \p ForwardIterator is mutable. |
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* \tparam InputIterator is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>, |
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* and \p InputIterator's \c value_type is convertible to \p Predicate's \c argument_type. |
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* \tparam Predicate is a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>. |
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* \tparam T is a model of <a href="http://www.sgi.com/tech/stl/Assignable.html">Assignable</a>, |
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* and \p T is convertible to \p ForwardIterator's \c value_type. |
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* |
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* The following code snippet demonstrates how to use \p replace_if to replace |
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* a \c device_vector's element with \c 0 when its corresponding stencil element is less than zero. |
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* |
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* \code |
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* #include <thrust/replace.h> |
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* #include <thrust/device_vector.h> |
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* |
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* struct is_less_than_zero |
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* { |
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* __host__ __device__ |
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* bool operator()(int x) |
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* { |
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* return x < 0; |
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* } |
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* }; |
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* |
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* ... |
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* |
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* thrust::device_vector<int> A(4); |
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* A[0] = 10; |
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* A[1] = 20; |
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* A[2] = 30; |
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* A[3] = 40; |
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* |
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* thrust::device_vector<int> S(4); |
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* S[0] = -1; |
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* S[1] = 0; |
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* S[2] = -1; |
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* S[3] = 0; |
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* |
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* is_less_than_zero pred; |
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* thrust::replace_if(A.begin(), A.end(), S.begin(), pred, 0); |
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* |
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* // A contains [0, 20, 0, 40] |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/replace_if.html |
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* \see \c replace |
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* \see \c replace_copy |
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* \see \c replace_copy_if |
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*/ |
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template<typename ForwardIterator, typename InputIterator, typename Predicate, typename T> |
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void replace_if(ForwardIterator first, ForwardIterator last, |
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InputIterator stencil, |
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Predicate pred, |
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const T &new_value); |
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|
|
|
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/*! \p replace_copy copies elements from the range <tt>[first, last)</tt> to the range |
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* <tt>[result, result + (last-first))</tt>, except that any element equal to \p old_value |
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* is not copied; \p new_value is copied instead. |
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* |
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* More precisely, for every integer \c n such that <tt>0 <= n < last-first</tt>, \p replace_copy |
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* performs the assignment <tt>*(result+n) = new_value</tt> if <tt>*(first+n) == old_value</tt>, |
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* and <tt>*(result+n) = *(first+n)</tt> otherwise. |
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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 to copy from. |
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* \param last The end of the sequence to copy from. |
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* \param result The beginning of the sequence to copy to. |
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* \param old_value The value to replace. |
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* \param new_value The replacement value for which <tt>*i == old_value</tt> evaluates to \c true. |
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* \return <tt>result + (last-first)</tt> |
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* |
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* \tparam DerivedPolicy The name of the derived execution policy. |
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* \tparam InputIterator is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>. |
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* \tparam OutputIterator is a model of <a href="http://www.sgi.com/tech/stl/OutputIterator.html">Output Iterator</a>. |
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* \tparam T is a model of <a href="http://www.sgi.com/tech/stl/Assignable.html">Assignable</a>, |
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* \p T is a model of <a href="http://www.sgi.com/tech/stl/EqualityComparable.html">Equality Comparable</a>, |
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* \p T may be compared for equality with \p InputIterator's \c value_type, |
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* and \p T is convertible to \p OutputIterator's \c value_type. |
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* |
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* \pre \p first may equal \p result, but the ranges <tt>[first, last)</tt> and <tt>[result, result + (last - first))</tt> shall not overlap otherwise. |
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* |
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* \code |
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* #include <thrust/replace.h> |
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* #include <thrust/device_vector.h> |
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* #include <thrust/execution_policy.h> |
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* ... |
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* thrust::device_vector<int> A(4); |
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* A[0] = 1; |
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* A[1] = 2; |
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* A[2] = 3; |
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* A[3] = 1; |
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* |
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* thrust::device_vector<int> B(4); |
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* |
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* thrust::replace_copy(thrust::device, A.begin(), A.end(), B.begin(), 1, 99); |
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* |
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* // B contains [99, 2, 3, 99] |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/replace_copy.html |
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* \see \c copy |
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* \see \c replace |
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* \see \c replace_if |
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* \see \c replace_copy_if |
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*/ |
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template<typename DerivedPolicy, typename InputIterator, typename OutputIterator, typename T> |
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OutputIterator replace_copy(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
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InputIterator first, InputIterator last, |
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OutputIterator result, |
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const T &old_value, |
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const T &new_value); |
|
|
|
|
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/*! \p replace_copy copies elements from the range <tt>[first, last)</tt> to the range |
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* <tt>[result, result + (last-first))</tt>, except that any element equal to \p old_value |
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* is not copied; \p new_value is copied instead. |
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* |
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* More precisely, for every integer \c n such that <tt>0 <= n < last-first</tt>, \p replace_copy |
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* performs the assignment <tt>*(result+n) = new_value</tt> if <tt>*(first+n) == old_value</tt>, |
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* and <tt>*(result+n) = *(first+n)</tt> otherwise. |
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* |
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* \param first The beginning of the sequence to copy from. |
|
* \param last The end of the sequence to copy from. |
|
* \param result The beginning of the sequence to copy to. |
|
* \param old_value The value to replace. |
|
* \param new_value The replacement value for which <tt>*i == old_value</tt> evaluates to \c true. |
|
* \return <tt>result + (last-first)</tt> |
|
* |
|
* \tparam InputIterator is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>. |
|
* \tparam OutputIterator is a model of <a href="http://www.sgi.com/tech/stl/OutputIterator.html">Output Iterator</a>. |
|
* \tparam T is a model of <a href="http://www.sgi.com/tech/stl/Assignable.html">Assignable</a>, |
|
* \p T is a model of <a href="http://www.sgi.com/tech/stl/EqualityComparable.html">Equality Comparable</a>, |
|
* \p T may be compared for equality with \p InputIterator's \c value_type, |
|
* and \p T is convertible to \p OutputIterator's \c value_type. |
|
* |
|
* \pre \p first may equal \p result, but the ranges <tt>[first, last)</tt> and <tt>[result, result + (last - first))</tt> shall not overlap otherwise. |
|
* |
|
* \code |
|
* #include <thrust/replace.h> |
|
* #include <thrust/device_vector.h> |
|
* ... |
|
* thrust::device_vector<int> A(4); |
|
* A[0] = 1; |
|
* A[1] = 2; |
|
* A[2] = 3; |
|
* A[3] = 1; |
|
* |
|
* thrust::device_vector<int> B(4); |
|
* |
|
* thrust::replace_copy(A.begin(), A.end(), B.begin(), 1, 99); |
|
* |
|
* // B contains [99, 2, 3, 99] |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/replace_copy.html |
|
* \see \c copy |
|
* \see \c replace |
|
* \see \c replace_if |
|
* \see \c replace_copy_if |
|
*/ |
|
template<typename InputIterator, typename OutputIterator, typename T> |
|
OutputIterator replace_copy(InputIterator first, InputIterator last, |
|
OutputIterator result, const T &old_value, |
|
const T &new_value); |
|
|
|
|
|
/*! \p replace_copy_if copies elements from the range <tt>[first, last)</tt> to the range |
|
* <tt>[result, result + (last-first))</tt>, except that any element for which \p pred |
|
* is \c true is not copied; \p new_value is copied instead. |
|
* |
|
* More precisely, for every integer \c n such that 0 <= n < last-first, |
|
* \p replace_copy_if performs the assignment <tt>*(result+n) = new_value</tt> if |
|
* <tt>pred(*(first+n))</tt>, and <tt>*(result+n) = *(first+n)</tt> otherwise. |
|
* |
|
* 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 to copy from. |
|
* \param last The end of the sequence to copy from. |
|
* \param result The beginning of the sequence to copy to. |
|
* \param pred The predicate to test on every value of the range <tt>[first,last)</tt>. |
|
* \param new_value The replacement value to assign <tt>pred(*i)</tt> evaluates to \c true. |
|
* \return <tt>result + (last-first)</tt> |
|
* |
|
* \tparam DerivedPolicy The name of the derived execution policy. |
|
* \tparam InputIterator is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>, |
|
* and \p InputIterator's \c value_type is convertible to \p Predicate's \c argument_type. |
|
* \tparam OutputIterator is a model of <a href="http://www.sgi.com/tech/stl/OutputIterator.html">Output Iterator</a>. |
|
* \tparam Predicate is a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>. |
|
* \tparam T is a model of <a href="http://www.sgi.com/tech/stl/Assignable.html">Assignable</a>, |
|
* and \p T is convertible to \p OutputIterator's \c value_type. |
|
* |
|
* \pre \p first may equal \p result, but the ranges <tt>[first, last)</tt> and <tt>[result, result + (last - first))</tt> shall not overlap otherwise. |
|
* |
|
* \code |
|
* #include <thrust/replace.h> |
|
* #include <thrust/device_vector.h> |
|
* #include <thrust/execution_policy.h> |
|
* |
|
* struct is_less_than_zero |
|
* { |
|
* __host__ __device__ |
|
* bool operator()(int x) |
|
* { |
|
* return x < 0; |
|
* } |
|
* }; |
|
* |
|
* ... |
|
* |
|
* thrust::device_vector<int> A(4); |
|
* A[0] = 1; |
|
* A[1] = -3; |
|
* A[2] = 2; |
|
* A[3] = -1; |
|
|
|
* thrust::device_vector<int> B(4); |
|
* is_less_than_zero pred; |
|
* |
|
* thrust::replace_copy_if(thrust::device, A.begin(), A.end(), B.begin(), pred, 0); |
|
* |
|
* // B contains [1, 0, 2, 0] |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/replace_copy_if.html |
|
* \see \c replace |
|
* \see \c replace_if |
|
* \see \c replace_copy |
|
*/ |
|
template<typename DerivedPolicy, typename InputIterator, typename OutputIterator, typename Predicate, typename T> |
|
OutputIterator replace_copy_if(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
|
InputIterator first, InputIterator last, |
|
OutputIterator result, |
|
Predicate pred, |
|
const T &new_value); |
|
|
|
|
|
/*! \p replace_copy_if copies elements from the range <tt>[first, last)</tt> to the range |
|
* <tt>[result, result + (last-first))</tt>, except that any element for which \p pred |
|
* is \c true is not copied; \p new_value is copied instead. |
|
* |
|
* More precisely, for every integer \c n such that 0 <= n < last-first, |
|
* \p replace_copy_if performs the assignment <tt>*(result+n) = new_value</tt> if |
|
* <tt>pred(*(first+n))</tt>, and <tt>*(result+n) = *(first+n)</tt> otherwise. |
|
* |
|
* \param first The beginning of the sequence to copy from. |
|
* \param last The end of the sequence to copy from. |
|
* \param result The beginning of the sequence to copy to. |
|
* \param pred The predicate to test on every value of the range <tt>[first,last)</tt>. |
|
* \param new_value The replacement value to assign <tt>pred(*i)</tt> evaluates to \c true. |
|
* \return <tt>result + (last-first)</tt> |
|
* |
|
* \tparam InputIterator is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>, |
|
* and \p InputIterator's \c value_type is convertible to \p Predicate's \c argument_type. |
|
* \tparam OutputIterator is a model of <a href="http://www.sgi.com/tech/stl/OutputIterator.html">Output Iterator</a>. |
|
* \tparam Predicate is a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>. |
|
* \tparam T is a model of <a href="http://www.sgi.com/tech/stl/Assignable.html">Assignable</a>, |
|
* and \p T is convertible to \p OutputIterator's \c value_type. |
|
* |
|
* \pre \p first may equal \p result, but the ranges <tt>[first, last)</tt> and <tt>[result, result + (last - first))</tt> shall not overlap otherwise. |
|
* |
|
* \code |
|
* #include <thrust/replace.h> |
|
* #include <thrust/device_vector.h> |
|
* |
|
* struct is_less_than_zero |
|
* { |
|
* __host__ __device__ |
|
* bool operator()(int x) |
|
* { |
|
* return x < 0; |
|
* } |
|
* }; |
|
* |
|
* ... |
|
* |
|
* thrust::device_vector<int> A(4); |
|
* A[0] = 1; |
|
* A[1] = -3; |
|
* A[2] = 2; |
|
* A[3] = -1; |
|
|
|
* thrust::device_vector<int> B(4); |
|
* is_less_than_zero pred; |
|
* |
|
* thrust::replace_copy_if(A.begin(), A.end(), B.begin(), pred, 0); |
|
* |
|
* // B contains [1, 0, 2, 0] |
|
* \endcode |
|
* |
|
* \see http://www.sgi.com/tech/stl/replace_copy_if.html |
|
* \see \c replace |
|
* \see \c replace_if |
|
* \see \c replace_copy |
|
*/ |
|
template<typename InputIterator, typename OutputIterator, typename Predicate, typename T> |
|
OutputIterator replace_copy_if(InputIterator first, InputIterator last, |
|
OutputIterator result, |
|
Predicate pred, |
|
const T &new_value); |
|
|
|
|
|
/*! This version of \p replace_copy_if copies elements from the range <tt>[first, last)</tt> to the range |
|
* <tt>[result, result + (last-first))</tt>, except that any element whose corresponding stencil |
|
* element causes \p pred to be \c true is not copied; \p new_value is copied instead. |
|
* |
|
* More precisely, for every integer \c n such that <tt>0 <= n < last-first</tt>, |
|
* \p replace_copy_if performs the assignment <tt>*(result+n) = new_value</tt> if |
|
* <tt>pred(*(stencil+n))</tt>, and <tt>*(result+n) = *(first+n)</tt> otherwise. |
|
* |
|
* 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 to copy from. |
|
* \param last The end of the sequence to copy from. |
|
* \param stencil The beginning of the stencil sequence. |
|
* \param result The beginning of the sequence to copy to. |
|
* \param pred The predicate to test on every value of the range <tt>[stencil, stencil + (last - first))</tt>. |
|
* \param new_value The replacement value to assign when <tt>pred(*s)</tt> evaluates to \c true. |
|
* \return <tt>result + (last-first)</tt> |
|
* |
|
* \tparam DerivedPolicy The name of the derived execution policy. |
|
* \tparam InputIterator1 is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>. |
|
* \tparam InputIterator2 is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a> |
|
* and \p InputIterator2's \c value_type is convertible to \p Predicate's \c argument_type. |
|
* \tparam OutputIterator is a model of <a href="http://www.sgi.com/tech/stl/OutputIterator.html">Output Iterator</a>. |
|
* \tparam Predicate is a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>. |
|
* \tparam T is a model of <a href="http://www.sgi.com/tech/stl/Assignable.html">Assignable</a>, |
|
* and \p T is convertible to \p OutputIterator's \c value_type. |
|
* |
|
* \pre \p first may equal \p result, but the ranges <tt>[first, last)</tt> and <tt>[result, result + (last - first))</tt> shall not overlap otherwise. |
|
* \pre \p stencil may equal \p result, but the ranges <tt>[stencil, stencil + (last - first))</tt> and <tt>[result, result + (last - first))</tt> shall not overlap otherwise. |
|
* |
|
* \code |
|
* #include <thrust/replace.h> |
|
* #include <thrust/device_vector.h> |
|
* #include <thrust/execution_policy.h> |
|
* |
|
* struct is_less_than_zero |
|
* { |
|
* __host__ __device__ |
|
* bool operator()(int x) |
|
* { |
|
* return x < 0; |
|
* } |
|
* }; |
|
* |
|
* ... |
|
* |
|
* thrust::device_vector<int> A(4); |
|
* A[0] = 10; |
|
* A[1] = 20; |
|
* A[2] = 30; |
|
* A[3] = 40; |
|
* |
|
* thrust::device_vector<int> S(4); |
|
* S[0] = -1; |
|
* S[1] = 0; |
|
* S[2] = -1; |
|
* S[3] = 0; |
|
* |
|
* thrust::device_vector<int> B(4); |
|
* is_less_than_zero pred; |
|
* |
|
* thrust::replace_if(thrust::device, A.begin(), A.end(), S.begin(), B.begin(), pred, 0); |
|
* |
|
* // B contains [0, 20, 0, 40] |
|
* \endcode |
|
* |
|
* \see \c replace_copy |
|
* \see \c replace_if |
|
*/ |
|
template<typename DerivedPolicy, typename InputIterator1, typename InputIterator2, typename OutputIterator, typename Predicate, typename T> |
|
OutputIterator replace_copy_if(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
|
InputIterator1 first, InputIterator1 last, |
|
InputIterator2 stencil, |
|
OutputIterator result, |
|
Predicate pred, |
|
const T &new_value); |
|
|
|
|
|
/*! This version of \p replace_copy_if copies elements from the range <tt>[first, last)</tt> to the range |
|
* <tt>[result, result + (last-first))</tt>, except that any element whose corresponding stencil |
|
* element causes \p pred to be \c true is not copied; \p new_value is copied instead. |
|
* |
|
* More precisely, for every integer \c n such that <tt>0 <= n < last-first</tt>, |
|
* \p replace_copy_if performs the assignment <tt>*(result+n) = new_value</tt> if |
|
* <tt>pred(*(stencil+n))</tt>, and <tt>*(result+n) = *(first+n)</tt> otherwise. |
|
* |
|
* \param first The beginning of the sequence to copy from. |
|
* \param last The end of the sequence to copy from. |
|
* \param stencil The beginning of the stencil sequence. |
|
* \param result The beginning of the sequence to copy to. |
|
* \param pred The predicate to test on every value of the range <tt>[stencil, stencil + (last - first))</tt>. |
|
* \param new_value The replacement value to assign when <tt>pred(*s)</tt> evaluates to \c true. |
|
* \return <tt>result + (last-first)</tt> |
|
* |
|
* \tparam InputIterator1 is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>. |
|
* \tparam InputIterator2 is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a> |
|
* and \p InputIterator2's \c value_type is convertible to \p Predicate's \c argument_type. |
|
* \tparam OutputIterator is a model of <a href="http://www.sgi.com/tech/stl/OutputIterator.html">Output Iterator</a>. |
|
* \tparam Predicate is a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>. |
|
* \tparam T is a model of <a href="http://www.sgi.com/tech/stl/Assignable.html">Assignable</a>, |
|
* and \p T is convertible to \p OutputIterator's \c value_type. |
|
* |
|
* \pre \p first may equal \p result, but the ranges <tt>[first, last)</tt> and <tt>[result, result + (last - first))</tt> shall not overlap otherwise. |
|
* \pre \p stencil may equal \p result, but the ranges <tt>[stencil, stencil + (last - first))</tt> and <tt>[result, result + (last - first))</tt> shall not overlap otherwise. |
|
* |
|
* \code |
|
* #include <thrust/replace.h> |
|
* #include <thrust/device_vector.h> |
|
* |
|
* struct is_less_than_zero |
|
* { |
|
* __host__ __device__ |
|
* bool operator()(int x) |
|
* { |
|
* return x < 0; |
|
* } |
|
* }; |
|
* |
|
* ... |
|
* |
|
* thrust::device_vector<int> A(4); |
|
* A[0] = 10; |
|
* A[1] = 20; |
|
* A[2] = 30; |
|
* A[3] = 40; |
|
* |
|
* thrust::device_vector<int> S(4); |
|
* S[0] = -1; |
|
* S[1] = 0; |
|
* S[2] = -1; |
|
* S[3] = 0; |
|
* |
|
* thrust::device_vector<int> B(4); |
|
* is_less_than_zero pred; |
|
* |
|
* thrust::replace_if(A.begin(), A.end(), S.begin(), B.begin(), pred, 0); |
|
* |
|
* // B contains [0, 20, 0, 40] |
|
* \endcode |
|
* |
|
* \see \c replace_copy |
|
* \see \c replace_if |
|
*/ |
|
template<typename InputIterator1, typename InputIterator2, typename OutputIterator, typename Predicate, typename T> |
|
OutputIterator replace_copy_if(InputIterator1 first, InputIterator1 last, |
|
InputIterator2 stencil, |
|
OutputIterator result, |
|
Predicate pred, |
|
const T &new_value); |
|
|
|
|
|
/*! \} // end replacing |
|
* \} // transformations |
|
*/ |
|
|
|
|
|
} // end thrust |
|
|
|
#include <thrust/detail/replace.inl> |
|
|
|
|