/*************************************************************************/ /* spdlog - an extremely fast and easy to use c++11 logging library. */ /* Copyright (c) 2014 Gabi Melman. */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ // // spdlog usage example // #include #include "spdlog/spdlog.h" int main(int, char* []) { namespace spd = spdlog; try { std::string filename = "logs/spdlog_example"; // Set log level to all loggers to DEBUG and above spd::set_level(spd::level::DEBUG); //Create console, multithreaded logger auto console = spd::stdout_logger_mt("console"); console->info("Welcome to spdlog!") ; console->info("An info message example {}..", 1); console->info() << "Streams are supported too " << 1; console->info("Easy padding in numbers like {:08d}", 12); console->info("Support for int: {0:d}; hex: {0:08x}; oct: {0:o}; bin: {0:b}", 42); console->info("Support for floats {:03.2f}", 1.23456); console->info("Positional args are {1} {0}..", "too", "supported"); console->info("{:<30}", "left aligned"); console->info("{:>30}", "right aligned"); console->info("{:^30}", "centered"); //Create a file rotating logger with 5mb size max and 3 rotated files auto file_logger = spd::rotating_logger_mt("file_logger", filename, 1024 * 1024 * 5, 3); file_logger->info("Log file message number", 1); for(int i = 0; i < 10; ++i) file_logger->info("{} * {} equals {:>10}", i, i, i*i); spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***"); file_logger->info("This is another message with custom format"); spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function"); // Debug and trace macros to be turned on/off at compile time. // Evaluates to empty statements if not turned on // Define SPDLOG_DEBUG_ON or SPDLOG_TRACE_ON - before including spdlog.h SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23); SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23); #ifdef __linux__ // syslog example std::string ident = "spdlog_example"; // empty ident can be used to use current program name auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID); syslog_logger->set_pattern("[%l] %v"); //syslog already put timestamps so set the pattern to minimum (log level and the message) syslog_logger->warn("This message that will end up in syslog. This is Linux only.."); #endif // Asynchronous logging is easy.. // Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous.. // Note: queue size must be power of 2! size_t q_size = 1048576; spdlog::set_async_mode(q_size); auto async_file= spd::daily_logger_st("async_file_logger", "logs/async_log.txt"); for(int i = 0; i < 100; i++) async_file->info("This is async log message #{}.. Should be very fast.. ", i); } catch (const spd::spdlog_ex& ex) { std::cout << "Log failed: " << ex.what() << std::endl; } return 0; }