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818 lines
32 KiB
818 lines
32 KiB
11 years ago
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/*
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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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*
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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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||
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* \see \c replace_copy
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||
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* \see \c replace_copy_if
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||
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*/
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|
template<typename DerivedPolicy, typename ForwardIterator, typename InputIterator, typename Predicate, typename T>
|
||
|
|
void replace_if(const thrust::detail::execution_policy_base<DerivedPolicy> &exec,
|
||
|
|
ForwardIterator first, ForwardIterator last,
|
||
|
|
InputIterator stencil,
|
||
|
|
Predicate pred,
|
||
|
|
const T &new_value);
|
||
|
|
|
||
|
|
|
||
|
|
/*! \p replace_if replaces every element in the range <tt>[first, last)</tt> for which
|
||
|
|
* <tt>pred(*s)</tt> returns \c true with \p new_value. That is: for every iterator
|
||
|
|
* \c i in the range <tt>[first, last)</tt>, and \c s in the range <tt>[stencil, stencil + (last - first))</tt>,
|
||
|
|
* if <tt>pred(*s)</tt> is \c true then it performs the assignment <tt>*i = new_value</tt>.
|
||
|
|
*
|
||
|
|
* \param first The beginning of the sequence of interest.
|
||
|
|
* \param last The end of the sequence of interest.
|
||
|
|
* \param stencil The beginning of the stencil sequence.
|
||
|
|
* \param pred The predicate to test on every value of the range <tt>[first,last)</tt>.
|
||
|
|
* \param new_value The new value to replace elements which <tt>pred(*i)</tt> evaluates
|
||
|
|
* to \c true.
|
||
|
|
*
|
||
|
|
* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a>,
|
||
|
|
* and \p ForwardIterator is mutable.
|
||
|
|
* \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 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 ForwardIterator's \c value_type.
|
||
|
|
*
|
||
|
|
* The following code snippet demonstrates how to use \p replace_if to replace
|
||
|
|
* a \c device_vector's element with \c 0 when its corresponding stencil element is less than zero.
|
||
|
|
*
|
||
|
|
* \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;
|
||
|
|
*
|
||
|
|
* is_less_than_zero pred;
|
||
|
|
* thrust::replace_if(A.begin(), A.end(), S.begin(), pred, 0);
|
||
|
|
*
|
||
|
|
* // A contains [0, 20, 0, 40]
|
||
|
|
* \endcode
|
||
|
|
*
|
||
|
|
* \see http://www.sgi.com/tech/stl/replace_if.html
|
||
|
|
* \see \c replace
|
||
|
|
* \see \c replace_copy
|
||
|
|
* \see \c replace_copy_if
|
||
|
|
*/
|
||
|
|
template<typename ForwardIterator, typename InputIterator, typename Predicate, typename T>
|
||
|
|
void replace_if(ForwardIterator first, ForwardIterator last,
|
||
|
|
InputIterator stencil,
|
||
|
|
Predicate pred,
|
||
|
|
const T &new_value);
|
||
|
|
|
||
|
|
|
||
|
|
/*! \p replace_copy copies elements from the range <tt>[first, last)</tt> to the range
|
||
|
|
* <tt>[result, result + (last-first))</tt>, except that any element equal to \p old_value
|
||
|
|
* 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
|
||
|
|
* performs the assignment <tt>*(result+n) = new_value</tt> if <tt>*(first+n) == old_value</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 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 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>.
|
||
|
|
* \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>
|
||
|
|
* #include <thrust/execution_policy.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(thrust::device, 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 DerivedPolicy, typename InputIterator, typename OutputIterator, typename T>
|
||
|
|
OutputIterator replace_copy(const thrust::detail::execution_policy_base<DerivedPolicy> &exec,
|
||
|
|
InputIterator first, InputIterator last,
|
||
|
|
OutputIterator result,
|
||
|
|
const T &old_value,
|
||
|
|
const T &new_value);
|
||
|
|
|
||
|
|
|
||
|
|
/*! \p replace_copy copies elements from the range <tt>[first, last)</tt> to the range
|
||
|
|
* <tt>[result, result + (last-first))</tt>, except that any element equal to \p old_value
|
||
|
|
* 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
|
||
|
|
* performs the assignment <tt>*(result+n) = new_value</tt> if <tt>*(first+n) == old_value</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 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>
|
||
|
|
|