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Diffstat (limited to 'matching/include/spdlog/details/fmt_helper.h')
-rw-r--r-- | matching/include/spdlog/details/fmt_helper.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/matching/include/spdlog/details/fmt_helper.h b/matching/include/spdlog/details/fmt_helper.h new file mode 100644 index 0000000..d76aac4 --- /dev/null +++ b/matching/include/spdlog/details/fmt_helper.h @@ -0,0 +1,122 @@ +// +// Created by gabi on 6/15/18. +// + +#pragma once + +#include <chrono> +#include <type_traits> +#include "spdlog/fmt/fmt.h" + +// Some fmt helpers to efficiently format and pad ints and strings +namespace spdlog { +namespace details { +namespace fmt_helper { + +template<size_t Buffer_Size> +inline spdlog::string_view_t to_string_view(const fmt::basic_memory_buffer<char, Buffer_Size> &buf) SPDLOG_NOEXCEPT +{ + return spdlog::string_view_t(buf.data(), buf.size()); +} + +template<size_t Buffer_Size1, size_t Buffer_Size2> +inline void append_buf(const fmt::basic_memory_buffer<char, Buffer_Size1> &buf, fmt::basic_memory_buffer<char, Buffer_Size2> &dest) +{ + auto *buf_ptr = buf.data(); + dest.append(buf_ptr, buf_ptr + buf.size()); +} + +template<size_t Buffer_Size> +inline void append_string_view(spdlog::string_view_t view, fmt::basic_memory_buffer<char, Buffer_Size> &dest) +{ + auto *buf_ptr = view.data(); + if (buf_ptr != nullptr) + { + dest.append(buf_ptr, buf_ptr + view.size()); + } +} + +template<typename T, size_t Buffer_Size> +inline void append_int(T n, fmt::basic_memory_buffer<char, Buffer_Size> &dest) +{ + fmt::format_int i(n); + dest.append(i.data(), i.data() + i.size()); +} + +template<typename T> +inline unsigned count_digits(T n) +{ + using count_type = typename std::conditional<(sizeof(T) > sizeof(uint32_t)), uint64_t, uint32_t>::type; + return static_cast<unsigned>(fmt::internal::count_digits(static_cast<count_type>(n))); +} + +template<size_t Buffer_Size> +inline void pad2(int n, fmt::basic_memory_buffer<char, Buffer_Size> &dest) +{ + if (n > 99) + { + append_int(n, dest); + } + else if (n > 9) // 10-99 + { + dest.push_back(static_cast<char>('0' + n / 10)); + dest.push_back(static_cast<char>('0' + n % 10)); + } + else if (n >= 0) // 0-9 + { + dest.push_back('0'); + dest.push_back(static_cast<char>('0' + n)); + } + else // negatives (unlikely, but just in case, let fmt deal with it) + { + fmt::format_to(dest, "{:02}", n); + } +} + +template<typename T, size_t Buffer_Size> +inline void pad_uint(T n, unsigned int width, fmt::basic_memory_buffer<char, Buffer_Size> &dest) +{ + static_assert(std::is_unsigned<T>::value, "pad_uint must get unsigned T"); + auto digits = count_digits(n); + if (width > digits) + { + const char *zeroes = "0000000000000000000"; + dest.append(zeroes, zeroes + width - digits); + } + append_int(n, dest); +} + +template<typename T, size_t Buffer_Size> +inline void pad3(T n, fmt::basic_memory_buffer<char, Buffer_Size> &dest) +{ + pad_uint(n, 3, dest); +} + +template<typename T, size_t Buffer_Size> +inline void pad6(T n, fmt::basic_memory_buffer<char, Buffer_Size> &dest) +{ + pad_uint(n, 6, dest); +} + +template<typename T, size_t Buffer_Size> +inline void pad9(T n, fmt::basic_memory_buffer<char, Buffer_Size> &dest) +{ + pad_uint(n, 9, dest); +} + +// return fraction of a second of the given time_point. +// e.g. +// fraction<std::milliseconds>(tp) -> will return the millis part of the second +template<typename ToDuration> +inline ToDuration time_fraction(const log_clock::time_point &tp) +{ + using std::chrono::duration_cast; + using std::chrono::seconds; + auto duration = tp.time_since_epoch(); + auto secs = duration_cast<seconds>(duration); + return duration_cast<ToDuration>(duration) - duration_cast<ToDuration>(secs); +} + +} // namespace fmt_helper +} // namespace details +} // namespace spdlog |