16609468613

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Merge 3dc9bc1dc into 079daa142

Pull Request Pull Request #18: From string

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/include/bitlib/bit-containers/bit_array_base.hpp

// ================================= BIT_ARRAY_BASE =================================== //
// Project:     The Experimental Bit Algorithms Library
// \file        bit_array_base.hpp
// Description: Base implementation for bit_array variants
// Creator:     Vincent Reverdy
// Contributor: Peter McLean [2025]
// License:     BSD 3-Clause License
// ========================================================================== //
#ifndef _BIT_ARRAY_BASE_HPP_INCLUDED
#define _BIT_ARRAY_BASE_HPP_INCLUDED
// ========================================================================== //

// ================================ PREAMBLE ================================ //
// C++ standard library
#include <algorithm>
#include <bit>
#include <cmath>
#include <span>
#include <string>
#include <type_traits>
#include <vector>

// Project sources
#include "bitlib/bit-algorithms/bit_algorithm.hpp"
#include "bitlib/bit-containers/bit_bitsof.hpp"
#include "bitlib/bit-containers/bit_policy.hpp"
#include "bitlib/bit-iterator/bit.hpp"

namespace bit {

template <typename T, size_t N, typename W, typename Policy>
class array_ref;

template <typename T,
          std::size_t N,
          typename W,
          typename Policy>
class array;

/**
 * @brief Base class template for array implementations
 *
 * This is a CRTP (Curiously Recurring Template Pattern) base class that provides
 * common functionality for array variants.
 *
 * @tparam Derived The derived class (CRTP pattern)
 * @tparam T The value type (typically bit_value)
 * @tparam W The word type used for storage
 * @tparam N The size of the bit array, or std::dynamic_extent for dynamic size
 * @tparam Policy The policy for integral conversion (default is typical)
 * @tparam Iterators A struct that provides iterator and const_iterator types
 */
template <typename Derived, typename T, size_t N, typename W, bool resizable, typename Policy, typename Iterators>
class array_base : public detail::container_size_storage<std::size_t, resizable, N> {
 protected:
  constexpr Derived& derived() noexcept {
    return static_cast<Derived&>(*this);
  }

  constexpr const Derived& derived() const noexcept {
    return static_cast<const Derived&>(*this);
  }

 public:
  using detail::container_size_storage<std::size_t, resizable, N>::size;
  using word_type = W;
  using value_type = T;
  using size_type = std::size_t;
  using difference_type = std::ptrdiff_t;
  using reference = typename std::conditional<std::is_same_v<T, bit_value>, bit_reference<word_type&>, T&>::type;
  using const_reference = typename std::conditional<std::is_same_v<T, bit_value>, const bit_reference<const word_type&>, const T&>::type;
  using pointer = typename std::conditional<std::is_same_v<T, bit_value>, bit_pointer<word_type>, T&>::type;
  using const_pointer = const pointer;
  using iterator = Iterators::iterator;
  using const_iterator = Iterators::const_iterator;

  constexpr array_base() noexcept : detail::container_size_storage<std::size_t, resizable, N>() {}
  constexpr array_base(const size_type& extent) noexcept
    requires(N == std::dynamic_extent)
      : detail::container_size_storage<std::size_t, resizable, N>(extent) {}

  // Element access
  constexpr reference operator[](size_type pos) {
    return derived().begin()[pos];
  }

  constexpr const_reference operator[](size_type pos) const {
    return derived().begin()[pos];
  }

  constexpr reference at(size_type pos) {
    if (pos < size()) {
      return derived().begin()[pos];
    } else {
      throw std::out_of_range("Position is out of range");
    }
  }

  constexpr const_reference at(size_type pos) const {
    if (pos < size()) {
      return derived().begin()[pos];
    } else {
      throw std::out_of_range("Position is out of range");
    }
  }

  constexpr reference front() {
    return derived().begin()[0];
  }

  constexpr const_reference front() const {
    return derived().begin()[0];
  }

  constexpr reference back() {
    return derived().begin()[size() - 1];
  }

  constexpr const_reference back() const {
    return derived().begin()[size() - 1];
  }

  constexpr iterator end() noexcept {
    return derived().begin() + size();
  }

  constexpr const_iterator end() const noexcept {
    return const_iterator(derived().begin()) + size();
  }

  constexpr const_iterator cbegin() const noexcept {
    return const_iterator(derived().begin());
  }

  constexpr const_iterator cend() const noexcept {
    return const_iterator(derived().end());
  }

  // Capacity
  constexpr bool empty() const noexcept {
    return 0 == size();
  }

  constexpr size_type max_size() const noexcept {
    return size();
  }

  // String representation
  constexpr std::string debug_string() const {
    return debug_string(derived().begin(), derived().end());
  }

  constexpr std::string debug_string(const_iterator first, const_iterator last) const {
    std::string ret = "";
    auto position = 0;
    for (auto it = first; it != last; ++it) {
      if (position % bitsof<word_type>() == 0 && position != 0) {
        ret += " ";
      } else if (position % 8 == 0 && position != 0) {
        ret += '.';
      }
      ret += *it == bit1 ? '1' : '0';
      ++position;
    }
    return ret;
  }

  /**
   * @brief Slice operations - returns a array_ref
   */
  constexpr auto operator()(size_type offset, size_type right) const noexcept {
    return array_ref<value_type, std::dynamic_extent, const word_type, Policy>(&this->at(offset), right - offset);
  }

  /**
   * @brief Slice operations - returns a array_ref
   */
  constexpr auto operator()(size_type offset, size_type right) noexcept {
    return array_ref<value_type, std::dynamic_extent, word_type, Policy>(&this->at(offset), right - offset);
  }

  // Common operations
  constexpr void fill(value_type bit_val) noexcept {
    std::fill(derived().begin(), derived().end(), bit_val);
  }

  /**
   * @brief Explicit conversion to integral types
   */
  template <std::integral U>
  explicit constexpr operator U() const noexcept {
    assert(size() <= bitsof<U>());
    U integral;

    if constexpr (N == std::dynamic_extent) {
      if (size() > bitsof<U>()) {
        Policy::truncation::template to_integral<U, N>(derived(), integral);
      } else {
        ::bit::copy(derived().begin(), end(), &integral);
      }
      if (size() < bitsof<U>()) {
        Policy::extension::template to_integral<U, N>(detail::uninitialized, derived(), integral);
      }
    } else {
      if constexpr (N > bitsof<U>()) {
        Policy::truncation::template to_integral<U, N>(derived(), integral);
      } else {
        ::bit::copy(derived().begin(), end(), &integral);
      }
      if constexpr (N < bitsof<U>()) {
        Policy::extension::template to_integral<U, N>(detail::uninitialized, derived(), integral);
      }
    }

    return integral;
  }

  using compatible_bitarray = array<value_type, N, word_type, Policy>;

  constexpr compatible_bitarray operator~() {
    compatible_bitarray result(detail::uninitialized, size());
    transform(derived().begin(), derived().end(), result.begin(), [](const word_type& bits) -> word_type { return ~bits; });
    return result;
  }

  constexpr compatible_bitarray operator|(const bit_sized_range auto& other) const {
    assert(other.size() == size());
    compatible_bitarray result(detail::uninitialized, size());
    transform(derived().begin(), derived().end(), other.begin(), result.begin(),
              [](const word_type& a, const word_type& b) -> word_type { return a | b; });
    return result;
  }
  constexpr Derived& operator|=(bit_sized_range auto& other) {
    assert(other.size() == size());
    transform(derived().begin(), derived().end(), other.begin(), derived().begin(),
              [](const word_type& a, const word_type& b) -> word_type { return a | b; });
    return derived();
  }
  constexpr compatible_bitarray operator&(const bit_sized_range auto& other) const {
    assert(other.size() == size());
    compatible_bitarray result(detail::uninitialized, size());
    transform(derived().begin(), derived().end(), other.begin(), result.begin(),
              [](const word_type& a, const word_type& b) -> word_type { return a & b; });
    return result;
  }
  constexpr Derived& operator&=(bit_sized_range auto& other) {
    assert(other.size() == size());
    transform(derived().begin(), derived().end(), other.begin(), derived().begin(),
              [](const word_type& a, const word_type& b) -> word_type { return a & b; });
    return derived();
  }
  constexpr compatible_bitarray operator^(const bit_sized_range auto& other) const {
    assert(other.size() == size());
    compatible_bitarray result(detail::uninitialized, size());
    transform(derived().begin(), derived().end(), other.begin(), result.begin(),
              [](const word_type& a, const word_type& b) -> word_type { return a ^ b; });
    return result;
  }
  constexpr Derived& operator^=(bit_sized_range auto& other) {
    assert(other.size() == size());
    transform(derived().begin(), derived().end(), other.begin(), derived().begin(),
              [](const word_type& a, const word_type& b) -> word_type { return a ^ b; });
    return derived();
  }

 protected:
  template <typename U>
  constexpr void from_integral(const U& integral) {
    if constexpr (N == std::dynamic_extent) {
      if ((size() * bitsof<value_type>()) < bitsof<U>()) {
        Policy::truncation::template from_integral<U, N>(derived(), integral);
      } else {
        ::bit::copy(&integral, &integral + 1, derived().begin());
      }
      if (bitsof<U>() < (size() * bitsof<value_type>())) {
        Policy::extension::template from_integral<U, N>(detail::uninitialized, derived(), integral);
      }
    } else {
      if constexpr ((N * bitsof<value_type>()) < bitsof<U>()) {
        Policy::truncation::template from_integral<U, N>(derived(), integral);
      } else {
        ::bit::copy(&integral, &integral + 1, derived().begin());
      }
      if constexpr (bitsof<U>() < (N * bitsof<value_type>())) {
        Policy::extension::template from_integral<U, N>(detail::uninitialized, derived(), integral);
      }
    }
  }
};

constexpr bool operator==(const bit_sized_range auto& lhs, const bit_sized_range auto& rhs) {
  if (lhs.size() != rhs.size()) {
    return false;
  }
  return ::bit::equal(lhs.begin(), lhs.end(), rhs.begin());
}

}  // namespace bit

#endif  // _BIT_ARRAY_BASE_HPP_INCLUDED

1	// ================================= BIT_ARRAY_BASE =================================== //
2	// Project: The Experimental Bit Algorithms Library
3	// \file bit_array_base.hpp
4	// Description: Base implementation for bit_array variants
5	// Creator: Vincent Reverdy
6	// Contributor: Peter McLean [2025]
7	// License: BSD 3-Clause License
8	// ========================================================================== //
9	#ifndef _BIT_ARRAY_BASE_HPP_INCLUDED
10	#define _BIT_ARRAY_BASE_HPP_INCLUDED
11	// ========================================================================== //
12
13	// ================================ PREAMBLE ================================ //
14	// C++ standard library
15	#include <algorithm>
16	#include <bit>
17	#include <cmath>
18	#include <span>
19	#include <string>
20	#include <type_traits>
21	#include <vector>
22
23	// Project sources
24	#include "bitlib/bit-algorithms/bit_algorithm.hpp"
25	#include "bitlib/bit-containers/bit_bitsof.hpp"
26	#include "bitlib/bit-containers/bit_policy.hpp"
27	#include "bitlib/bit-iterator/bit.hpp"
28
29	namespace bit {
30
31	template <typename T, size_t N, typename W, typename Policy>
32	class array_ref;
33
34	template <typename T,
35	std::size_t N,
36	typename W,
37	typename Policy>
38	class array;
39
40	/**
41	* @brief Base class template for array implementations
42	*
43	* This is a CRTP (Curiously Recurring Template Pattern) base class that provides
44	* common functionality for array variants.
45	*
46	* @tparam Derived The derived class (CRTP pattern)
47	* @tparam T The value type (typically bit_value)
48	* @tparam W The word type used for storage
49	* @tparam N The size of the bit array, or std::dynamic_extent for dynamic size
50	* @tparam Policy The policy for integral conversion (default is typical)
51	* @tparam Iterators A struct that provides iterator and const_iterator types
52	*/
53	template <typename Derived, typename T, size_t N, typename W, bool resizable, typename Policy, typename Iterators>
54	class array_base : public detail::container_size_storage<std::size_t, resizable, N> {
55	protected:
56	constexpr Derived& derived() noexcept {	4,072✔
57	return static_cast<Derived&>(*this);	4,072✔
58	}	2,036✔
59
60	constexpr const Derived& derived() const noexcept {	168✔
61	return static_cast<const Derived&>(*this);	168✔
62	}	84✔
63
64	public:
65	using detail::container_size_storage<std::size_t, resizable, N>::size;
66	using word_type = W;
67	using value_type = T;
68	using size_type = std::size_t;
69	using difference_type = std::ptrdiff_t;
70	using reference = typename std::conditional<std::is_same_v<T, bit_value>, bit_reference<word_type&>, T&>::type;
71	using const_reference = typename std::conditional<std::is_same_v<T, bit_value>, const bit_reference<const word_type&>, const T&>::type;
72	using pointer = typename std::conditional<std::is_same_v<T, bit_value>, bit_pointer<word_type>, T&>::type;
73	using const_pointer = const pointer;
74	using iterator = Iterators::iterator;
75	using const_iterator = Iterators::const_iterator;
76
77	constexpr array_base() noexcept : detail::container_size_storage<std::size_t, resizable, N>() {}	432✔
78	constexpr array_base(const size_type& extent) noexcept	123✔
79	requires(N == std::dynamic_extent)
80	: detail::container_size_storage<std::size_t, resizable, N>(extent) {}	246✔
81
82	// Element access
83	constexpr reference operator[](size_type pos) {	3,576✔
84	return derived().begin()[pos];	5,364✔
85	}	1,788✔
86
87	constexpr const_reference operator[](size_type pos) const {
88	return derived().begin()[pos];
89	}
90
91	constexpr reference at(size_type pos) {	26✔
92	if (pos < size()) {	26!
93	return derived().begin()[pos];	30✔
94	} else {	10✔
95	throw std::out_of_range("Position is out of range");	6✔
96	}	3✔
97	}	13✔
98
99	constexpr const_reference at(size_type pos) const {
100	if (pos < size()) {
101	return derived().begin()[pos];
102	} else {
103	throw std::out_of_range("Position is out of range");
104	}
105	}
106
107	constexpr reference front() {	6✔
108	return derived().begin()[0];	9✔
109	}	3✔
110
111	constexpr const_reference front() const {
112	return derived().begin()[0];
113	}
114
115	constexpr reference back() {	6✔
116	return derived().begin()[size() - 1];	9✔
117	}	3✔
118
119	constexpr const_reference back() const {
120	return derived().begin()[size() - 1];
121	}
122
123	constexpr iterator end() noexcept {	152✔
124	return derived().begin() + size();	152✔
125	}	76✔
126
127	constexpr const_iterator end() const noexcept {	130✔
128	return const_iterator(derived().begin()) + size();	130✔
129	}	65✔
130
131	constexpr const_iterator cbegin() const noexcept {
132	return const_iterator(derived().begin());
133	}
134
135	constexpr const_iterator cend() const noexcept {
136	return const_iterator(derived().end());
137	}
138
139	// Capacity
140	constexpr bool empty() const noexcept {	8✔
141	return 0 == size();	8✔
142	}	4✔
143
144	constexpr size_type max_size() const noexcept {	2✔
145	return size();	2✔
146	}	1✔
147
148	// String representation
149	constexpr std::string debug_string() const {
150	return debug_string(derived().begin(), derived().end());
151	}
152
153	constexpr std::string debug_string(const_iterator first, const_iterator last) const {
154	std::string ret = "";
155	auto position = 0;
156	for (auto it = first; it != last; ++it) {
157	if (position % bitsof<word_type>() == 0 && position != 0) {
158	ret += " ";
159	} else if (position % 8 == 0 && position != 0) {
160	ret += '.';
161	}
162	ret += *it == bit1 ? '1' : '0';
163	++position;
164	}
165	return ret;
166	}
167
168	/**
169	* @brief Slice operations - returns a array_ref
170	*/
171	constexpr auto operator()(size_type offset, size_type right) const noexcept {
172	return array_ref<value_type, std::dynamic_extent, const word_type, Policy>(&this->at(offset), right - offset);
173	}
174
175	/**
176	* @brief Slice operations - returns a array_ref
177	*/
178	constexpr auto operator()(size_type offset, size_type right) noexcept {	16✔
179	return array_ref<value_type, std::dynamic_extent, word_type, Policy>(&this->at(offset), right - offset);	16✔
180	}	8✔
181
182	// Common operations
183	constexpr void fill(value_type bit_val) noexcept {	78✔
184	std::fill(derived().begin(), derived().end(), bit_val);	78✔
185	}	78✔
186
187	/**
188	* @brief Explicit conversion to integral types
189	*/
190	template <std::integral U>
191	explicit constexpr operator U() const noexcept {	16✔
192	assert(size() <= bitsof<U>());	16!
193	U integral;	16✔
194
195	if constexpr (N == std::dynamic_extent) {	8✔
196	if (size() > bitsof<U>()) {	4!
197	Policy::truncation::template to_integral<U, N>(derived(), integral);	×
198	} else {	2✔
199	::bit::copy(derived().begin(), end(), &integral);	4✔
200	}	2✔
201	if (size() < bitsof<U>()) {	4!
NEW 202	Policy::extension::template to_integral<U, N>(detail::uninitialized, derived(), integral);	×
UNCOV 203	}
204	} else {	6✔
205	if constexpr (N > bitsof<U>()) {
206	Policy::truncation::template to_integral<U, N>(derived(), integral);
207	} else {	6✔
208	::bit::copy(derived().begin(), end(), &integral);	12✔
209	}	6✔
210	if constexpr (N < bitsof<U>()) {	6✔
211	Policy::extension::template to_integral<U, N>(detail::uninitialized, derived(), integral);	10✔
212	}	5✔
213	}	6✔
214
215	return integral;	16✔
216	}	8✔
217
218	using compatible_bitarray = array<value_type, N, word_type, Policy>;
219
220	constexpr compatible_bitarray operator~() {	4✔
221	compatible_bitarray result(detail::uninitialized, size());	6✔
222	transform(derived().begin(), derived().end(), result.begin(), [](const word_type& bits) -> word_type { return ~bits; });	8✔
223	return result;	6✔
224	}	2✔
225
226	constexpr compatible_bitarray operator\|(const bit_sized_range auto& other) const {	2✔
227	assert(other.size() == size());	2!
228	compatible_bitarray result(detail::uninitialized, size());	2✔
229	transform(derived().begin(), derived().end(), other.begin(), result.begin(),	2✔
230	[](const word_type& a, const word_type& b) -> word_type { return a \| b; });	3✔
231	return result;	3✔
232	}	1✔
233	constexpr Derived& operator\|=(bit_sized_range auto& other) {	2✔
234	assert(other.size() == size());	2!
235	transform(derived().begin(), derived().end(), other.begin(), derived().begin(),	2✔
236	[](const word_type& a, const word_type& b) -> word_type { return a \| b; });	3✔
237	return derived();	3✔
238	}	1✔
239	constexpr compatible_bitarray operator&(const bit_sized_range auto& other) const {	2✔
240	assert(other.size() == size());	2!
241	compatible_bitarray result(detail::uninitialized, size());	2✔
242	transform(derived().begin(), derived().end(), other.begin(), result.begin(),	2✔
243	[](const word_type& a, const word_type& b) -> word_type { return a & b; });	3✔
244	return result;	3✔
245	}	1✔
246	constexpr Derived& operator&=(bit_sized_range auto& other) {	2✔
247	assert(other.size() == size());	2!
248	transform(derived().begin(), derived().end(), other.begin(), derived().begin(),	2✔
249	[](const word_type& a, const word_type& b) -> word_type { return a & b; });	3✔
250	return derived();	3✔
251	}	1✔
252	constexpr compatible_bitarray operator^(const bit_sized_range auto& other) const {	2✔
253	assert(other.size() == size());	2!
254	compatible_bitarray result(detail::uninitialized, size());	2✔
255	transform(derived().begin(), derived().end(), other.begin(), result.begin(),	2✔
256	[](const word_type& a, const word_type& b) -> word_type { return a ^ b; });	3✔
257	return result;	3✔
258	}	1✔
259	constexpr Derived& operator^=(bit_sized_range auto& other) {	2✔
260	assert(other.size() == size());	2!
261	transform(derived().begin(), derived().end(), other.begin(), derived().begin(),	2✔
262	[](const word_type& a, const word_type& b) -> word_type { return a ^ b; });	3✔
263	return derived();	3✔
264	}	1✔
265
266	protected:
267	template <typename U>
268	constexpr void from_integral(const U& integral) {	124✔
269	if constexpr (N == std::dynamic_extent) {
270	if ((size() * bitsof<value_type>()) < bitsof<U>()) {
271	Policy::truncation::template from_integral<U, N>(derived(), integral);
272	} else {
273	::bit::copy(&integral, &integral + 1, derived().begin());
274	}
275	if (bitsof<U>() < (size() * bitsof<value_type>())) {
276	Policy::extension::template from_integral<U, N>(detail::uninitialized, derived(), integral);
277	}
278	} else {	62✔
279	if constexpr ((N * bitsof<value_type>()) < bitsof<U>()) {	62✔
280	Policy::truncation::template from_integral<U, N>(derived(), integral);	76✔
281	} else {	38✔
282	::bit::copy(&integral, &integral + 1, derived().begin());	48✔
283	}	24✔
284	if constexpr (bitsof<U>() < (N * bitsof<value_type>())) {
285	Policy::extension::template from_integral<U, N>(detail::uninitialized, derived(), integral);
286	}
287	}	62✔
288	}	124✔
289	};
290
291	constexpr bool operator==(const bit_sized_range auto& lhs, const bit_sized_range auto& rhs) {	80✔
292	if (lhs.size() != rhs.size()) {	80!
293	return false;	4✔
294	}	2✔
295	return ::bit::equal(lhs.begin(), lhs.end(), rhs.begin());	76✔
296	}	40✔
297
298	} // namespace bit
299
300	#endif // _BIT_ARRAY_BASE_HPP_INCLUDED

PeterCDMcLean / BitLib / 16609468613

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