protozero
1.6.8
Minimalistic protocol buffer decoder and encoder in C++.
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Go to the documentation of this file. 1 #ifndef PROTOZERO_ITERATORS_HPP
2 #define PROTOZERO_ITERATORS_HPP
22 #if PROTOZERO_BYTE_ORDER != PROTOZERO_LITTLE_ENDIAN
38 template <
typename T,
typename P = std::pair<T, T>>
40 #ifdef PROTOZERO_STRICT_API
53 using value_type =
typename std::iterator_traits<T>::value_type;
69 P{std::forward<iterator>(first_iterator),
70 std::forward<iterator>(last_iterator)} {
98 constexpr
bool empty()
const noexcept {
107 std::size_t
size()
const noexcept {
108 return static_cast<size_t>(std::distance(
begin(),
end()));
117 protozero_assert(!
empty());
118 return *(this->first);
127 protozero_assert(!
empty());
138 swap(this->first, other.first);
139 swap(this->second, other.second);
150 template <
typename T>
159 template <
typename T>
163 const char* m_data =
nullptr;
169 using iterator_category = std::random_access_iterator_tag;
170 using value_type = T;
171 using difference_type = std::ptrdiff_t;
172 using pointer = value_type*;
173 using reference = value_type&;
189 value_type operator*()
const noexcept {
191 std::memcpy(&result, m_data,
sizeof(value_type));
192 #if PROTOZERO_BYTE_ORDER != PROTOZERO_LITTLE_ENDIAN
199 m_data +=
sizeof(value_type);
210 m_data -=
sizeof(value_type);
221 return lhs.m_data == rhs.m_data;
225 return !(lhs == rhs);
229 return lhs.m_data < rhs.m_data;
245 m_data += (
sizeof(value_type) * val);
251 tmp.m_data += (
sizeof(value_type) * rhs);
257 tmp.m_data += (
sizeof(value_type) * lhs);
262 m_data -= (
sizeof(value_type) * val);
268 tmp.m_data -= (
sizeof(value_type) * rhs);
273 return static_cast<difference_type>(lhs.m_data - rhs.m_data) / static_cast<difference_type>(
sizeof(T));
276 value_type operator[](difference_type n)
const noexcept {
288 template <
typename T>
294 const char*
m_data =
nullptr;
297 const char*
m_end =
nullptr;
303 using iterator_category = std::forward_iterator_tag;
304 using value_type = T;
305 using difference_type = std::ptrdiff_t;
306 using pointer = value_type*;
307 using reference = value_type&;
318 return std::count_if(begin.
m_data, end.
m_data, [](
char c) noexcept {
319 return (static_cast<unsigned char>(c) & 0x80U) == 0;
338 value_type operator*()
const {
362 return !(*
this == rhs);
373 template <
typename T>
380 using iterator_category = std::forward_iterator_tag;
381 using value_type = T;
382 using difference_type = std::ptrdiff_t;
383 using pointer = value_type*;
384 using reference = value_type&;
402 value_type operator*()
const {
403 protozero_assert(this->
m_data);
404 const char* d = this->
m_data;
409 protozero_assert(this->
m_data);
415 protozero_assert(this->
m_data);
481 #endif // PROTOZERO_ITERATORS_HPP
std::size_t size() const noexcept
Definition: iterators.hpp:106
bool operator>=(const data_view lhs, const data_view rhs) noexcept
Definition: data_view.hpp:227
constexpr iterator_range()
Definition: iterators.hpp:57
Contains macro checks for different configurations.
All parts of the protozero header-only library are in this namespace.
Definition: byteswap.hpp:22
Contains functions to swap bytes in values (for different endianness).
Definition: iterators.hpp:373
Definition: iterators.hpp:288
constexpr int64_t decode_zigzag64(uint64_t value) noexcept
Definition: varint.hpp:198
constexpr iterator cend() const noexcept
Return iterator to end of range.
Definition: iterators.hpp:88
Definition: iterators.hpp:38
bool operator<(const data_view lhs, const data_view rhs) noexcept
Definition: data_view.hpp:197
constexpr bool operator==(const data_view lhs, const data_view rhs) noexcept
Definition: data_view.hpp:175
value_type front() const
Definition: iterators.hpp:115
Definition: iterators.hpp:159
bool operator>(const data_view lhs, const data_view rhs) noexcept
Definition: data_view.hpp:217
constexpr iterator cbegin() const noexcept
Return iterator to beginning of range.
Definition: iterators.hpp:83
const char * m_data
Pointer to current iterator position.
Definition: iterators.hpp:293
void swap(iterator_range &other) noexcept
Definition: iterators.hpp:135
T iterator
The type of the iterators in this range.
Definition: iterators.hpp:49
void swap(data_view &lhs, data_view &rhs) noexcept
Definition: data_view.hpp:164
constexpr iterator begin() const noexcept
Return iterator to beginning of range.
Definition: iterators.hpp:73
typename std::iterator_traits< T >::value_type value_type
The value type of the underlying iterator.
Definition: iterators.hpp:52
bool operator<=(const data_view lhs, const data_view rhs) noexcept
Definition: data_view.hpp:207
void byteswap_inplace(uint32_t *ptr) noexcept
byteswap the data pointed to by ptr in-place.
Definition: byteswap.hpp:54
constexpr iterator end() const noexcept
Return iterator to end of range.
Definition: iterators.hpp:78
uint64_t decode_varint(const char **data, const char *end)
Definition: varint.hpp:88
constexpr bool empty() const noexcept
Definition: iterators.hpp:97
void skip_varint(const char **data, const char *end)
Definition: varint.hpp:111
constexpr bool operator!=(const data_view lhs, const data_view rhs) noexcept
Definition: data_view.hpp:187
Contains low-level varint and zigzag encoding and decoding functions.
const char * m_end
Pointer to end iterator position.
Definition: iterators.hpp:296
void swap(iterator_range< T > &lhs, iterator_range< T > &rhs) noexcept
Definition: iterators.hpp:150
void drop_front()
Definition: iterators.hpp:125