mirror of
https://github.com/gabime/spdlog.git
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307 lines
8.7 KiB
C++
307 lines
8.7 KiB
C++
// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
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// Distributed under the MIT License (http://opensource.org/licenses/MIT)
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#pragma once
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#include <array>
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#include <atomic>
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#include <chrono>
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#include <cstdint>
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#include <cstdio>
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#include <exception>
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#include <functional>
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#include <initializer_list>
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#include <memory>
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#include <string>
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#include <type_traits>
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#include "details/null_mutex.h"
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#include "source_loc.h"
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#include "tweakme.h"
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#if __has_include(<version>)
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#include <version>
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#endif
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#ifdef SPDLOG_USE_STD_FORMAT
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#if __cpp_lib_format >= 202207L
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#include <format>
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#else
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#include <string_view>
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#endif
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#endif
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#if defined(SPDLOG_SHARED_LIB)
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#if defined(_WIN32)
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#ifdef spdlog_EXPORTS
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#define SPDLOG_API __declspec(dllexport)
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#else // !spdlog_EXPORTS
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#define SPDLOG_API __declspec(dllimport)
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#endif
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#else // !defined(_WIN32)
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#define SPDLOG_API __attribute__((visibility("default")))
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#endif
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#else // !defined(SPDLOG_SHARED_LIB)
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#define SPDLOG_API
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#endif
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#include "fmt/fmt.h"
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#if !defined(SPDLOG_USE_STD_FORMAT) && \
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FMT_VERSION >= 80000 // backward compatibility with fmt versions older than 8
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#define SPDLOG_FMT_RUNTIME(format_string) fmt::runtime(format_string)
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#if defined(SPDLOG_WCHAR_FILENAMES)
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#include "fmt/xchar.h"
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#endif
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#else
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#define SPDLOG_FMT_RUNTIME(format_string) format_string
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#endif
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#ifndef SPDLOG_FUNCTION
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#define SPDLOG_FUNCTION static_cast<const char *>(__FUNCTION__)
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#endif
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#ifdef SPDLOG_NO_EXCEPTIONS
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#define SPDLOG_TRY
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#define SPDLOG_THROW(ex) \
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do { \
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printf("spdlog fatal error: %s\n", ex.what()); \
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std::abort(); \
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} while (0)
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#define SPDLOG_CATCH_STD
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#else
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#define SPDLOG_TRY try
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#define SPDLOG_THROW(ex) throw(ex)
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#define SPDLOG_CATCH_STD \
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catch (const std::exception &) { \
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}
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#endif
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namespace spdlog {
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class formatter;
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namespace sinks {
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class sink;
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}
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#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
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using filename_t = std::wstring;
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// allow macro expansion to occur in SPDLOG_FILENAME_T
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#define SPDLOG_FILENAME_T_INNER(s) L##s
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#define SPDLOG_FILENAME_T(s) SPDLOG_FILENAME_T_INNER(s)
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#else
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using filename_t = std::string;
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#define SPDLOG_FILENAME_T(s) s
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#endif
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using log_clock = std::chrono::system_clock;
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using sink_ptr = std::shared_ptr<sinks::sink>;
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using sinks_init_list = std::initializer_list<sink_ptr>;
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using err_handler = std::function<void(const std::string &err_msg)>;
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#ifdef SPDLOG_USE_STD_FORMAT
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namespace fmt_lib = std;
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using string_view_t = std::string_view;
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using memory_buf_t = std::string;
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using wstring_view_t = std::wstring_view;
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using wmemory_buf_t = std::wstring;
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template <typename... Args>
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#if __cpp_lib_format >= 202207L
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using format_string_t = std::format_string<Args...>;
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#else
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using format_string_t = std::string_view;
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#endif
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#define SPDLOG_BUF_TO_STRING(x) x
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#else // use fmt lib instead of std::format
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namespace fmt_lib = fmt;
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using string_view_t = fmt::basic_string_view<char>;
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using memory_buf_t = fmt::basic_memory_buffer<char, 250>;
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template <typename... Args>
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using format_string_t = fmt::format_string<Args...>;
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using wstring_view_t = fmt::basic_string_view<wchar_t>;
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using wmemory_buf_t = fmt::basic_memory_buffer<wchar_t, 250>;
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#define SPDLOG_BUF_TO_STRING(x) fmt::to_string(x)
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#endif // SPDLOG_USE_STD_FORMAT
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#define SPDLOG_LEVEL_TRACE 0
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#define SPDLOG_LEVEL_DEBUG 1
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#define SPDLOG_LEVEL_INFO 2
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#define SPDLOG_LEVEL_WARN 3
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#define SPDLOG_LEVEL_ERROR 4
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#define SPDLOG_LEVEL_CRITICAL 5
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#define SPDLOG_LEVEL_OFF 6
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#if !defined(SPDLOG_ACTIVE_LEVEL)
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#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_INFO
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#endif
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// Is convertable to string_view_t ?
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template <typename T>
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using is_convertible_to_sv = std::enable_if_t<std::is_convertible_v<T, string_view_t>>;
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// Log level enum
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enum class level {
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trace = SPDLOG_LEVEL_TRACE,
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debug = SPDLOG_LEVEL_DEBUG,
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info = SPDLOG_LEVEL_INFO,
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warn = SPDLOG_LEVEL_WARN,
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err = SPDLOG_LEVEL_ERROR,
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critical = SPDLOG_LEVEL_CRITICAL,
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off = SPDLOG_LEVEL_OFF,
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n_levels
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};
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#if defined(SPDLOG_NO_ATOMIC_LEVELS)
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using atomic_level_t = details::null_atomic<level>;
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#else
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using atomic_level_t = std::atomic<level>;
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#endif
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#if !defined(SPDLOG_LEVEL_NAMES)
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#define SPDLOG_LEVEL_NAMES \
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{ "trace", "debug", "info", "warning", "error", "critical", "off" }
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#endif
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#if !defined(SPDLOG_SHORT_LEVEL_NAMES)
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#define SPDLOG_SHORT_LEVEL_NAMES \
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{ "T", "D", "I", "W", "E", "C", "O" }
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#endif
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[[nodiscard]] constexpr size_t level_to_number(level lvl) noexcept {
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return static_cast<size_t>(lvl);
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}
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constexpr auto levels_count = level_to_number(level::n_levels);
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constexpr std::array<string_view_t, levels_count> level_string_views SPDLOG_LEVEL_NAMES;
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constexpr std::array<string_view_t, levels_count> short_level_names SPDLOG_SHORT_LEVEL_NAMES;
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[[nodiscard]] constexpr string_view_t to_string_view(spdlog::level lvl) noexcept {
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return level_string_views.at(level_to_number(lvl));
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}
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[[nodiscard]] constexpr const string_view_t to_short_string_view(spdlog::level lvl) noexcept {
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return short_level_names.at(level_to_number(lvl));
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}
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[[nodiscard]] SPDLOG_API spdlog::level level_from_str(const std::string &name) noexcept;
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//
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// Color mode used by sinks with color support.
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//
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enum class color_mode { always, automatic, never };
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//
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// Pattern time - specific time getting to use for pattern_formatter.
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// local time by default
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//
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enum class pattern_time_type {
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local, // log localtime
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utc // log utc
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};
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//
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// Log exception
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//
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class SPDLOG_API spdlog_ex : public std::exception {
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public:
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explicit spdlog_ex(std::string msg);
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spdlog_ex(const std::string &msg, int last_errno);
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[[nodiscard]] const char *what() const noexcept override;
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private:
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std::string msg_;
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};
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[[noreturn]] SPDLOG_API void throw_spdlog_ex(const std::string &msg, int last_errno);
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[[noreturn]] SPDLOG_API void throw_spdlog_ex(std::string msg);
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// trick to capture format string and caller's source location with variadic template.
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// see logger::info() etc. to understand how it's used.
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struct loc_with_fmt {
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source_loc loc;
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string_view_t fmt_string;
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template <typename S, typename = is_convertible_to_sv<S>>
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constexpr loc_with_fmt(S fmt_str, source_loc loc = source_loc::current()) noexcept
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: loc(loc),
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fmt_string(fmt_str) {}
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#ifndef SPDLOG_USE_STD_FORMAT
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constexpr loc_with_fmt(fmt::runtime_format_string<char> fmt_str,
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source_loc loc = source_loc::current()) noexcept
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: loc(loc),
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fmt_string(fmt_str.str) {}
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#endif
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};
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struct file_event_handlers {
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file_event_handlers()
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: before_open(nullptr),
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after_open(nullptr),
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before_close(nullptr),
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after_close(nullptr) {}
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std::function<void(const filename_t &filename)> before_open;
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std::function<void(const filename_t &filename, std::FILE *file_stream)> after_open;
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std::function<void(const filename_t &filename, std::FILE *file_stream)> before_close;
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std::function<void(const filename_t &filename)> after_close;
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};
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namespace details {
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// to_string_view
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[[nodiscard]] constexpr spdlog::string_view_t to_string_view(const memory_buf_t &buf) noexcept {
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return spdlog::string_view_t{buf.data(), buf.size()};
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}
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[[nodiscard]] constexpr spdlog::string_view_t to_string_view(spdlog::string_view_t str) noexcept {
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return str;
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}
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#if defined(SPDLOG_WCHAR_FILENAMES)
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[[nodiscard]] constexpr spdlog::wstring_view_t to_string_view(const wmemory_buf_t &buf) noexcept {
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return spdlog::wstring_view_t{buf.data(), buf.size()};
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}
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[[nodiscard]] constexpr spdlog::wstring_view_t to_string_view(spdlog::wstring_view_t str) noexcept {
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return str;
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}
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#endif
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// convert format_string<...> to string_view depending on format lib versions
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#if defined(SPDLOG_USE_STD_FORMAT)
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#if __cpp_lib_format >= 202207L // std::format and __cpp_lib_format >= 202207L
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template <typename T, typename... Args>
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[[nodiscard]] constexpr std::basic_string_view<T> to_string_view(
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std::basic_format_string<T, Args...> fmt) noexcept {
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return fmt.get();
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}
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#else // std::format and __cpp_lib_format < 202207L
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template <typename T, typename... Args>
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[[nodiscard]] constexpr std::basic_string_view<T> to_string_view(
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std::basic_format_string<T, Args...> fmt) noexcept {
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return fmt;
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}
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#endif
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#else // {fmt} version
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template <typename T, typename... Args>
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[[nodiscard]] constexpr fmt::basic_string_view<T> to_string_view(
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fmt::basic_format_string<T, Args...> fmt) noexcept {
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return fmt;
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}
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#endif
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} // namespace details
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} // namespace spdlog
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