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📄 algo.h(102.35 KB)
📄 algobase.h(10.88 KB)
📄 algorithm(1.35 KB)
📄 algorithmfwd.h(29.46 KB)
📄 balanced_quicksort.h(15.78 KB)
📄 base.h(12.02 KB)
📄 basic_iterator.h(1.57 KB)
📄 checkers.h(4.5 KB)
📄 compatibility.h(10.06 KB)
📄 compiletime_settings.h(2.75 KB)
📄 equally_split.h(3.12 KB)
📄 features.h(3.5 KB)
📄 find.h(13.96 KB)
📄 find_selectors.h(6.93 KB)
📄 for_each.h(3.58 KB)
📄 for_each_selectors.h(9.57 KB)
📄 iterator.h(5.15 KB)
📄 list_partition.h(5.79 KB)
📄 losertree.h(25.12 KB)
📄 merge.h(9.33 KB)
📄 multiseq_selection.h(16.31 KB)
📄 multiway_merge.h(71.04 KB)
📄 multiway_mergesort.h(15.12 KB)
📄 numeric(19.04 KB)
📄 numericfwd.h(6.77 KB)
📄 omp_loop.h(3.9 KB)
📄 omp_loop_static.h(3.94 KB)
📄 par_loop.h(4.43 KB)
📄 parallel.h(1.54 KB)
📄 partial_sum.h(6.88 KB)
📄 partition.h(14.56 KB)
📄 queue.h(4.79 KB)
📄 quicksort.h(5.78 KB)
📄 random_number.h(3.72 KB)
📄 random_shuffle.h(17.28 KB)
📄 search.h(5.47 KB)
📄 set_operations.h(14.13 KB)
📄 settings.h(10.73 KB)
📄 sort.h(7.25 KB)
📄 tags.h(5.96 KB)
📄 types.h(4.02 KB)
📄 unique_copy.h(5.67 KB)
📄 workstealing.h(9.85 KB)

Editing: find_selectors.h

// -*- C++ -*-

// Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the terms
// of the GNU General Public License as published by the Free Software
// Foundation; either version 3, or (at your option) any later
// version.

// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file parallel/find_selectors.h
 *  @brief Function objects representing different tasks to be plugged
 *  into the parallel find algorithm.
 *  This file is a GNU parallel extension to the Standard C++ Library.
 */

// Written by Felix Putze.

#ifndef _GLIBCXX_PARALLEL_FIND_SELECTORS_H
#define _GLIBCXX_PARALLEL_FIND_SELECTORS_H 1

#include <parallel/tags.h>
#include <parallel/basic_iterator.h>
#include <bits/stl_pair.h>

namespace __gnu_parallel
{
  /** @brief Base class of all __gnu_parallel::find_template selectors. */
  struct generic_find_selector
  { };

/** 
   *  @brief Test predicate on a single element, used for std::find()
   *  and std::find_if ().
   */
  struct find_if_selector : public generic_find_selector
  {
    /** @brief Test on one position.
     * @param i1 Iterator on first sequence.
     * @param i2 Iterator on second sequence (unused).
     * @param pred Find predicate.
     */
    template<typename RandomAccessIterator1, typename RandomAccessIterator2,
	     typename Pred>
      bool 
      operator()(RandomAccessIterator1 i1, RandomAccessIterator2 i2, Pred pred)
      { return pred(*i1); }

/** @brief Corresponding sequential algorithm on a sequence.
     *  @param begin1 Begin iterator of first sequence.
     *  @param end1 End iterator of first sequence.
     *  @param begin2 Begin iterator of second sequence.
     *  @param pred Find predicate.
     */
    template<typename RandomAccessIterator1, typename RandomAccessIterator2,
	     typename Pred>
      std::pair<RandomAccessIterator1, RandomAccessIterator2> 
      sequential_algorithm(RandomAccessIterator1 begin1,
			   RandomAccessIterator1 end1,
			   RandomAccessIterator2 begin2, Pred pred)
      { return std::make_pair(find_if(begin1, end1, pred,
				      sequential_tag()), begin2); }
  };

/** @brief Test predicate on two adjacent elements. */
  struct adjacent_find_selector : public generic_find_selector
  {
    /** @brief Test on one position.
     *  @param i1 Iterator on first sequence.
     *  @param i2 Iterator on second sequence (unused).
     *  @param pred Find predicate.
     */
    template<typename RandomAccessIterator1, typename RandomAccessIterator2,
	     typename Pred>
      bool 
      operator()(RandomAccessIterator1 i1, RandomAccessIterator2 i2, Pred pred)
      {
	// Passed end iterator is one short.
	return pred(*i1, *(i1 + 1));
      }

/** @brief Corresponding sequential algorithm on a sequence.
     *  @param begin1 Begin iterator of first sequence.
     *  @param end1 End iterator of first sequence.
     *  @param begin2 Begin iterator of second sequence.
     *  @param pred Find predicate.
     */
    template<typename RandomAccessIterator1, typename RandomAccessIterator2,
	     typename Pred>
      std::pair<RandomAccessIterator1, RandomAccessIterator2>
      sequential_algorithm(RandomAccessIterator1 begin1,
			   RandomAccessIterator1 end1,
			   RandomAccessIterator2 begin2, Pred pred)
      {
	// Passed end iterator is one short.
	RandomAccessIterator1 spot = adjacent_find(begin1, end1 + 1,
						   pred, sequential_tag());
	if (spot == (end1 + 1))
	  spot = end1;
	return std::make_pair(spot, begin2);
      }
  };

/** @brief Test inverted predicate on a single element. */
  struct mismatch_selector : public generic_find_selector
  {
    /** 
     *  @brief Test on one position.
     *  @param i1 Iterator on first sequence.
     *  @param i2 Iterator on second sequence (unused).
     *  @param pred Find predicate. 
     */
    template<typename RandomAccessIterator1, typename RandomAccessIterator2,
	     typename Pred>
      bool 
      operator()(RandomAccessIterator1 i1, RandomAccessIterator2 i2, Pred pred)
      { return !pred(*i1, *i2); }

/** 
     *  @brief Corresponding sequential algorithm on a sequence.
     *  @param begin1 Begin iterator of first sequence.
     *  @param end1 End iterator of first sequence.
     *  @param begin2 Begin iterator of second sequence.
     *  @param pred Find predicate. 
     */
    template<typename RandomAccessIterator1, typename RandomAccessIterator2,
	     typename Pred>
      std::pair<RandomAccessIterator1, RandomAccessIterator2>
      sequential_algorithm(RandomAccessIterator1 begin1,
			   RandomAccessIterator1 end1,
			   RandomAccessIterator2 begin2, Pred pred)
      { return mismatch(begin1, end1, begin2, pred, sequential_tag()); }
  };

/** @brief Test predicate on several elements. */
  template<typename ForwardIterator>
  struct find_first_of_selector : public generic_find_selector
  {
    ForwardIterator begin;
    ForwardIterator end;

explicit find_first_of_selector(ForwardIterator begin, ForwardIterator end)
    : begin(begin), end(end) { }

/** @brief Test on one position.
     *  @param i1 Iterator on first sequence.
     *  @param i2 Iterator on second sequence (unused).
     *  @param pred Find predicate. */
    template<typename RandomAccessIterator1, typename RandomAccessIterator2,
	     typename Pred>
      bool 
      operator()(RandomAccessIterator1 i1, RandomAccessIterator2 i2, Pred pred)
      {
	for (ForwardIterator pos_in_candidates = begin;
	     pos_in_candidates != end; ++pos_in_candidates)
	  if (pred(*i1, *pos_in_candidates))
	    return true;
	return false;
      }

/** @brief Corresponding sequential algorithm on a sequence.
     *  @param begin1 Begin iterator of first sequence.
     *  @param end1 End iterator of first sequence.
     *  @param begin2 Begin iterator of second sequence.
     *  @param pred Find predicate. */
    template<typename RandomAccessIterator1, typename RandomAccessIterator2,
	     typename Pred>
      std::pair<RandomAccessIterator1, RandomAccessIterator2>
      sequential_algorithm(RandomAccessIterator1 begin1,
			   RandomAccessIterator1 end1,
			   RandomAccessIterator2 begin2, Pred pred)
      { return std::make_pair(find_first_of(begin1, end1, begin, end, pred,
					    sequential_tag()), begin2); }
  };
}

#endif /* _GLIBCXX_PARALLEL_FIND_SELECTORS_H */

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