// Copyright(c) 2015-present, Gabi Melman & spdlog contributors. // Distributed under the MIT License (http://opensource.org/licenses/MIT) #pragma once #include <chrono> #include <type_traits> #include <spdlog/fmt/fmt.h> #include <spdlog/common.h> // Some fmt helpers to efficiently format and pad ints and strings namespace spdlog { namespace details { namespace fmt_helper { inline spdlog::string_view_t to_string_view(const memory_buf_t &buf) SPDLOG_NOEXCEPT { return spdlog::string_view_t{buf.data(), buf.size()}; } inline void append_string_view(spdlog::string_view_t view, memory_buf_t &dest) { auto *buf_ptr = view.data(); dest.append(buf_ptr, buf_ptr + view.size()); } template<typename T> inline void append_int(T n, memory_buf_t &dest) { fmt::format_int i(n); dest.append(i.data(), i.data() + i.size()); } template<typename T> inline unsigned int count_digits(T n) { using count_type = typename std::conditional<(sizeof(T) > sizeof(uint32_t)), uint64_t, uint32_t>::type; return static_cast<unsigned int>(fmt:: // fmt 7.0.0 renamed the internal namespace to detail. // See: https://github.com/fmtlib/fmt/issues/1538 #if FMT_VERSION < 70000 internal #else detail #endif ::count_digits(static_cast<count_type>(n))); } inline void pad2(int n, memory_buf_t &dest) { if (n >= 0 && n < 100) // 0-99 { dest.push_back(static_cast<char>('0' + n / 10)); dest.push_back(static_cast<char>('0' + n % 10)); } else // unlikely, but just in case, let fmt deal with it { fmt::format_to(dest, "{:02}", n); } } template<typename T> inline void pad_uint(T n, unsigned int width, memory_buf_t &dest) { static_assert(std::is_unsigned<T>::value, "pad_uint must get unsigned T"); for (auto digits = count_digits(n); digits < width; digits++) { dest.push_back('0'); } append_int(n, dest); } template<typename T> inline void pad3(T n, memory_buf_t &dest) { static_assert(std::is_unsigned<T>::value, "pad3 must get unsigned T"); if (n < 1000) { dest.push_back(static_cast<char>(n / 100 + '0')); n = n % 100; dest.push_back(static_cast<char>((n / 10) + '0')); dest.push_back(static_cast<char>((n % 10) + '0')); } else { append_int(n, dest); } } template<typename T> inline void pad6(T n, memory_buf_t &dest) { pad_uint(n, 6, dest); } template<typename T> inline void pad9(T n, memory_buf_t &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(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