21namespace seqan3::detail
35template <
typename char_t,
typename traits_t = std::
char_traits<
char_t>>
36class fast_ostreambuf_iterator
40 stream_buffer_exposer<char_t, traits_t> * stream_buf =
nullptr;
46 using difference_type = ptrdiff_t;
47 using value_type = char_t;
48 using reference = char_t;
56 fast_ostreambuf_iterator() noexcept = default;
57 fast_ostreambuf_iterator(fast_ostreambuf_iterator const &) noexcept = default;
58 fast_ostreambuf_iterator(fast_ostreambuf_iterator &&) noexcept = default;
59 fast_ostreambuf_iterator & operator=(fast_ostreambuf_iterator const &) noexcept = default;
60 fast_ostreambuf_iterator & operator=(fast_ostreambuf_iterator &&) noexcept = default;
61 ~fast_ostreambuf_iterator() noexcept = default;
64 explicit fast_ostreambuf_iterator(
std::basic_streambuf<char_t, traits_t> & ibuf) :
65 stream_buf{
reinterpret_cast<stream_buffer_exposer<char_t, traits_t> *
>(&ibuf)}
67 assert(stream_buf !=
nullptr);
68 if (stream_buf->pptr() == stream_buf->epptr())
69 stream_buf->overflow();
77 fast_ostreambuf_iterator & operator++()
82 fast_ostreambuf_iterator & operator++(
int)
89 fast_ostreambuf_iterator & operator*()
95 fast_ostreambuf_iterator & operator=(char_t
const c)
97 assert(stream_buf !=
nullptr);
98 if (stream_buf->pptr() == stream_buf->epptr())
100 if (stream_buf->sputc(c) == traits_t::eof())
109 *stream_buf->pptr() = c;
110 stream_buf->pbump(1);
116 bool failed() const noexcept
118 return stream_buf->overflow() == traits_t::eof();
139 template <std::ranges::forward_range range_type>
140 requires std::ranges::borrowed_range<range_type>
141 auto write_range(range_type && rng)
143 using sen_t = std::ranges::sentinel_t<range_type>;
144 using it_t = std::ranges::iterator_t<range_type>;
147 sen_t
end = std::ranges::end(rng);
151 size_t const buffer_space = stream_buf->epptr() - stream_buf->pptr();
153 if constexpr (std::ranges::sized_range<range_type>)
155 size_t const characters_to_write = std::min<size_t>(std::ranges::distance(it, end), buffer_space);
158 stream_buf->pbump(characters_to_write);
163 for (; it !=
end && i < buffer_space; ++it, ++i)
164 *stream_buf->pptr() = *it;
165 stream_buf->pbump(i);
172 if (stream_buf->overflow(*it) == traits_t::eof())
187 template <std::ranges::forward_range range_type>
188 void write_range(range_type && rng)
198 template <
typename number_type>
199 requires std::is_arithmetic_v<number_type>
200 auto write_number(number_type num)
202 if (stream_buf->epptr() - stream_buf->pptr() > 300)
204 auto res =
std::to_chars(stream_buf->pptr(), stream_buf->epptr(), num);
205 stream_buf->pbump(res.ptr - stream_buf->pptr());
210 auto res =
std::to_chars(&arithmetic_buffer[0], &arithmetic_buffer[0] +
sizeof(arithmetic_buffer), num);
211 write_range(std::ranges::subrange<char *, char *>(&arithmetic_buffer[0], res.ptr));
219 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.