24namespace seqan3::detail
38template <
typename char_t,
typename traits_t = std::
char_traits<
char_t>>
39class fast_ostreambuf_iterator
43 stream_buffer_exposer<char_t, traits_t> * stream_buf =
nullptr;
49 using difference_type = ptrdiff_t;
50 using value_type = char_t;
51 using reference = char_t;
59 fast_ostreambuf_iterator() noexcept = default;
60 fast_ostreambuf_iterator(fast_ostreambuf_iterator const &) noexcept = default;
61 fast_ostreambuf_iterator(fast_ostreambuf_iterator &&) noexcept = default;
62 fast_ostreambuf_iterator & operator=(fast_ostreambuf_iterator const &) noexcept = default;
63 fast_ostreambuf_iterator & operator=(fast_ostreambuf_iterator &&) noexcept = default;
64 ~fast_ostreambuf_iterator() noexcept = default;
67 explicit fast_ostreambuf_iterator(
std::basic_streambuf<char_t, traits_t> & ibuf) :
68 stream_buf{
reinterpret_cast<stream_buffer_exposer<char_t, traits_t> *
>(&ibuf)}
70 assert(stream_buf !=
nullptr);
71 if (stream_buf->pptr() == stream_buf->epptr())
72 stream_buf->overflow();
80 fast_ostreambuf_iterator & operator++()
85 fast_ostreambuf_iterator & operator++(
int)
92 fast_ostreambuf_iterator & operator*()
98 fast_ostreambuf_iterator & operator=(char_t
const c)
100 assert(stream_buf !=
nullptr);
101 if (stream_buf->pptr() == stream_buf->epptr())
103 if (stream_buf->sputc(c) == traits_t::eof())
112 *stream_buf->pptr() = c;
113 stream_buf->pbump(1);
119 bool failed() const noexcept
121 return stream_buf->overflow() == traits_t::eof();
142 template <std::ranges::forward_range range_type>
143 requires std::ranges::borrowed_range<range_type>
144 auto write_range(range_type && rng)
146 using sen_t = std::ranges::sentinel_t<range_type>;
147 using it_t = std::ranges::iterator_t<range_type>;
150 sen_t
end = std::ranges::end(rng);
154 size_t const buffer_space = stream_buf->epptr() - stream_buf->pptr();
156 if constexpr (std::ranges::sized_range<range_type>)
158 size_t const characters_to_write = std::min<size_t>(std::ranges::distance(it, end), buffer_space);
161 stream_buf->pbump(characters_to_write);
166 for (; it !=
end && i < buffer_space; ++it, ++i)
167 *stream_buf->pptr() = *it;
168 stream_buf->pbump(i);
175 if (stream_buf->overflow(*it) == traits_t::eof())
190 template <std::ranges::forward_range range_type>
191 void write_range(range_type && rng)
201 template <
typename number_type>
202 requires std::is_arithmetic_v<number_type>
203 auto write_number(number_type num)
205 if (stream_buf->epptr() - stream_buf->pptr() > 300)
207 auto res =
std::to_chars(stream_buf->pptr(), stream_buf->epptr(), num);
208 stream_buf->pbump(res.ptr - stream_buf->pptr());
213 auto res =
std::to_chars(&arithmetic_buffer[0], &arithmetic_buffer[0] +
sizeof(arithmetic_buffer), num);
214 write_range(std::ranges::subrange<char *, char *>(&arithmetic_buffer[0], res.ptr));
222 void write_end_of_line(
bool const add_cr)
The <charconv> header from C++17's standard library.
SeqAn specific customisations in the standard namespace.
Provides seqan3::detail::stream_buffer_exposer.