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143 lines
3.7 KiB
C++
143 lines
3.7 KiB
C++
#pragma once
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#include <string>
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#include <cstdio>
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#include <cstdlib>
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#include <ctime>
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#include <iostream>
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#include <sstream>
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#include "crow/settings.h"
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namespace crow
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{
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enum class LogLevel
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{
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#ifndef ERROR
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DEBUG = 0,
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INFO,
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WARNING,
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ERROR,
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CRITICAL,
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#endif
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Debug = 0,
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Info,
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Warning,
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Error,
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Critical,
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};
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class ILogHandler {
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public:
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virtual void log(std::string message, LogLevel level) = 0;
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};
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class CerrLogHandler : public ILogHandler {
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public:
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void log(std::string message, LogLevel /*level*/) override {
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std::cerr << message;
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}
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};
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class logger {
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private:
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//
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static std::string timestamp()
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{
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char date[32];
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time_t t = time(0);
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tm my_tm;
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#ifdef _MSC_VER
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gmtime_s(&my_tm, &t);
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#else
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gmtime_r(&t, &my_tm);
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#endif
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size_t sz = strftime(date, sizeof(date), "%Y-%m-%d %H:%M:%S", &my_tm);
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return std::string(date, date+sz);
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}
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public:
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logger(std::string prefix, LogLevel level) : level_(level) {
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#ifdef CROW_ENABLE_LOGGING
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stringstream_ << "(" << timestamp() << ") [" << prefix << "] ";
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#endif
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}
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~logger() {
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#ifdef CROW_ENABLE_LOGGING
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if(level_ >= get_current_log_level()) {
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stringstream_ << std::endl;
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get_handler_ref()->log(stringstream_.str(), level_);
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}
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#endif
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}
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//
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template <typename T>
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logger& operator<<(T const &value) {
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#ifdef CROW_ENABLE_LOGGING
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if(level_ >= get_current_log_level()) {
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stringstream_ << value;
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}
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#endif
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return *this;
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}
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//
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static void setLogLevel(LogLevel level) {
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get_log_level_ref() = level;
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}
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static void setHandler(ILogHandler* handler) {
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get_handler_ref() = handler;
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}
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static LogLevel get_current_log_level() {
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return get_log_level_ref();
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}
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private:
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//
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static LogLevel& get_log_level_ref()
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{
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static LogLevel current_level = (LogLevel)CROW_LOG_LEVEL;
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return current_level;
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}
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static ILogHandler*& get_handler_ref()
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{
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static CerrLogHandler default_handler;
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static ILogHandler* current_handler = &default_handler;
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return current_handler;
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}
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//
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std::ostringstream stringstream_;
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LogLevel level_;
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};
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}
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#define CROW_LOG_CRITICAL \
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if (crow::logger::get_current_log_level() <= crow::LogLevel::Critical) \
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crow::logger("CRITICAL", crow::LogLevel::Critical)
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#define CROW_LOG_ERROR \
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if (crow::logger::get_current_log_level() <= crow::LogLevel::Error) \
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crow::logger("ERROR ", crow::LogLevel::Error)
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#define CROW_LOG_WARNING \
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if (crow::logger::get_current_log_level() <= crow::LogLevel::Warning) \
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crow::logger("WARNING ", crow::LogLevel::Warning)
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#define CROW_LOG_INFO \
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if (crow::logger::get_current_log_level() <= crow::LogLevel::Info) \
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crow::logger("INFO ", crow::LogLevel::Info)
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#define CROW_LOG_DEBUG \
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if (crow::logger::get_current_log_level() <= crow::LogLevel::Debug) \
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crow::logger("DEBUG ", crow::LogLevel::Debug)
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