tpl_dynarray_set.H

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/*
                          Aleph_w
 
  Data structures & Algorithms
  version 2.0.0b
  https://github.com/lrleon/Aleph-w
 
  This file is part of Aleph-w library
 
  Copyright (c) 2002-2026 Leandro Rabindranath Leon
 
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
 
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
 
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
*/
 
 
# ifndef TPL_DYNARRAY_SET_H
# define TPL_DYNARRAY_SET_H
 
# include <stdexcept>
# include <utility>
 
# include <tpl_dynArray.H>
# include <tpl_sort_utils.H>
 # include <ah-errors.H>
 
namespace Aleph
{
 
  template <typename T, class Equal = Aleph::equal_to<T>>
  class DynArray_Set : public DynArray<T>
  {
    using Base = DynArray<T>;
 
    Equal eq;
 
  public:
    using Item_Type = T;
    using Key_Type = T;
 
    using Base::Base;
 
    explicit DynArray_Set(Equal __eq) : Base(), eq(std::move(__eq))
    {
      // empty
    }
 
    DynArray_Set(Equal __eq, const size_t dim) : Base(dim), eq(std::move(__eq))
    {
      // empty
    }
 
    DynArray_Set(Equal __eq, size_t _pow_dir, size_t _pow_seg, size_t _pow_block)
      : Base(_pow_dir, _pow_seg, _pow_block), eq(std::move(__eq))
    {
      // empty
    }
 
    const Equal & get_equal() const noexcept { return eq; }
 
    void set_equal(Equal __eq) { eq = std::move(__eq); }
 
    T * insert(const T & item)
    {
      return &this->append(item);
    }
 
    T * insert(T && item)
    {
      return &this->append(std::forward<T>(item));
    }
 
    T * search(const T & key) noexcept
    {
      for (size_t i = 0; i < this->size(); ++i)
        if (eq(this->access(i), key))
          return &this->access(i);
      return nullptr;
    }
 
    const T * search(const T & key) const noexcept
    {
      return const_cast<DynArray_Set *>(this)->search(key);
    }
 
    bool contains(const T & key) const noexcept
    {
      return search(key) != nullptr;
    }
 
    T & find(const T & key)
    {
      auto * p = search(key);
      ah_domain_error_if(p == nullptr) << "key not found";
      return *p;
    }
 
    const T & find(const T & key) const
    {
      return const_cast<DynArray_Set *>(this)->find(key);
    }
 
    size_t count(const T & key) const noexcept
    {
      size_t n = 0;
      for (size_t i = 0; i < this->size(); ++i)
        if (eq(this->access(i), key))
          ++n;
      return n;
    }
 
    bool remove_one(const T & key)
    {
      auto * p = search(key);
      if (p == nullptr)
        return false;
      this->remove(*p);
      return true;
    }
 
    size_t remove_all(const T & key)
    {
      size_t removed = 0;
      for (size_t i = 0; i < this->size();)
        {
          if (eq(this->access(i), key))
            {
              this->remove(this->access(i));
              ++removed;
            }
          else
            ++i;
        }
      return removed;
    }
  };
 
}
 
# endif // TPL_DYNARRAY_SET_H