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gabime
2023-09-25 16:08:29 +03:00
parent 230e15f499
commit 9d52261185
93 changed files with 1527 additions and 1430 deletions
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168
example/example.cpp
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@@ -31,12 +31,12 @@ void replace_default_logger_example();
#include "spdlog/cfg/env.h" // support for loading levels from the environment variable
#include "spdlog/fmt/ostr.h" // support for user defined types
int main(int, char *[])
{
int main(int, char *[]) {
// Log levels can be loaded from argv/env using "SPDLOG_LEVEL"
load_levels_example();
spdlog::info("Welcome to spdlog version {}.{}.{} !", SPDLOG_VER_MAJOR, SPDLOG_VER_MINOR, SPDLOG_VER_PATCH);
spdlog::info("Welcome to spdlog version {}.{}.{} !", SPDLOG_VER_MAJOR, SPDLOG_VER_MINOR,
SPDLOG_VER_PATCH);
spdlog::warn("Easy padding in numbers like {:08d}", 12);
spdlog::critical("Support for int: {0:d}; hex: {0:x}; oct: {0:o}; bin: {0:b}", 42);
@@ -60,15 +60,13 @@ int main(int, char *[])
// Loggers can store in a ring buffer all messages (including debug/trace) for later inspection.
// When needed, call dump_backtrace() to see what happened:
spdlog::enable_backtrace(10); // create ring buffer with capacity of 10 messages
for (int i = 0; i < 100; i++)
{
for (int i = 0; i < 100; i++) {
spdlog::debug("Backtrace message {}", i); // not logged..
}
// e.g. if some error happened:
spdlog::dump_backtrace(); // log them now!
try
{
try {
stdout_logger_example();
basic_example();
rotating_example();
@@ -100,8 +98,7 @@ int main(int, char *[])
}
// Exceptions will only be thrown upon failed logger or sink construction (not during logging).
catch (const spdlog::spdlog_ex &ex)
{
catch (const spdlog::spdlog_ex &ex) {
std::printf("Log initialization failed: %s\n", ex.what());
return 1;
}
@@ -109,8 +106,7 @@ int main(int, char *[])
#include "spdlog/sinks/stdout_color_sinks.h"
// or #include "spdlog/sinks/stdout_sinks.h" if no colors needed.
void stdout_logger_example()
{
void stdout_logger_example() {
// Create color multi threaded logger.
auto console = spdlog::stdout_color_mt("console");
// or for stderr:
@@ -118,38 +114,35 @@ void stdout_logger_example()
}
#include "spdlog/sinks/basic_file_sink.h"
void basic_example()
{
void basic_example() {
// Create basic file logger (not rotated).
auto my_logger = spdlog::basic_logger_mt("file_logger", "logs/basic-log.txt", true);
}
#include "spdlog/sinks/rotating_file_sink.h"
void rotating_example()
{
void rotating_example() {
// Create a file rotating logger with 5mb size max and 3 rotated files.
auto rotating_logger = spdlog::rotating_logger_mt("some_logger_name", "logs/rotating.txt", 1048576 * 5, 3);
auto rotating_logger =
spdlog::rotating_logger_mt("some_logger_name", "logs/rotating.txt", 1048576 * 5, 3);
}
#include "spdlog/sinks/daily_file_sink.h"
void daily_example()
{
void daily_example() {
// Create a daily logger - a new file is created every day on 2:30am.
auto daily_logger = spdlog::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
}
#include "spdlog/sinks/callback_sink.h"
void callback_example()
{
void callback_example() {
// Create the logger
auto logger = spdlog::callback_logger_mt("custom_callback_logger", [](const spdlog::details::log_msg & /*msg*/) {
// do what you need to do with msg
});
auto logger = spdlog::callback_logger_mt("custom_callback_logger",
[](const spdlog::details::log_msg & /*msg*/) {
// do what you need to do with msg
});
}
#include "spdlog/cfg/env.h"
void load_levels_example()
{
void load_levels_example() {
// Set the log level to "info" and mylogger to "trace":
// SPDLOG_LEVEL=info,mylogger=trace && ./example
spdlog::cfg::load_env_levels();
@@ -160,16 +153,17 @@ void load_levels_example()
}
#include "spdlog/async.h"
void async_example()
{
void async_example() {
// Default thread pool settings can be modified *before* creating the async logger:
// spdlog::init_thread_pool(32768, 1); // queue with max 32k items 1 backing thread.
auto async_file = spdlog::basic_logger_mt<spdlog::async_factory>("async_file_logger", "logs/async_log.txt");
auto async_file =
spdlog::basic_logger_mt<spdlog::async_factory>("async_file_logger", "logs/async_log.txt");
// alternatively:
// auto async_file = spdlog::create_async<spdlog::sinks::basic_file_sink_mt>("async_file_logger", "logs/async_log.txt");
// auto async_file =
// spdlog::create_async<spdlog::sinks::basic_file_sink_mt>("async_file_logger",
// "logs/async_log.txt");
for (int i = 1; i < 101; ++i)
{
for (int i = 1; i < 101; ++i) {
async_file->info("Async message #{}", i);
}
}
@@ -184,16 +178,15 @@ void async_example()
// {:n} - don't split the output to lines.
#if !defined SPDLOG_USE_STD_FORMAT || defined(_MSC_VER)
# include "spdlog/fmt/bin_to_hex.h"
void binary_example()
{
#include "spdlog/fmt/bin_to_hex.h"
void binary_example() {
std::vector<char> buf(80);
for (int i = 0; i < 80; i++)
{
for (int i = 0; i < 80; i++) {
buf.push_back(static_cast<char>(i & 0xff));
}
spdlog::info("Binary example: {}", spdlog::to_hex(buf));
spdlog::info("Another binary example:{:n}", spdlog::to_hex(std::begin(buf), std::begin(buf) + 10));
spdlog::info("Another binary example:{:n}",
spdlog::to_hex(std::begin(buf), std::begin(buf) + 10));
// more examples:
// logger->info("uppercase: {:X}", spdlog::to_hex(buf));
// logger->info("uppercase, no delimiters: {:Xs}", spdlog::to_hex(buf));
@@ -202,17 +195,15 @@ void binary_example()
// logger->info("hexdump style, 20 chars per line {:a}", spdlog::to_hex(buf, 20));
}
#else
void binary_example()
{
void binary_example() {
// not supported with std::format yet
}
#endif
// Log a vector of numbers
#ifndef SPDLOG_USE_STD_FORMAT
# include "spdlog/fmt/ranges.h"
void vector_example()
{
#include "spdlog/fmt/ranges.h"
void vector_example() {
std::vector<int> vec = {1, 2, 3};
spdlog::info("Vector example: {}", vec);
}
@@ -225,8 +216,7 @@ void vector_example() {}
// Compile time log levels.
// define SPDLOG_ACTIVE_LEVEL to required level (e.g. SPDLOG_LEVEL_TRACE)
void trace_example()
{
void trace_example() {
// trace from default logger
SPDLOG_TRACE("Some trace message.. {} ,{}", 1, 3.23);
// debug from default logger
@@ -240,16 +230,14 @@ void trace_example()
// stopwatch example
#include "spdlog/stopwatch.h"
#include <thread>
void stopwatch_example()
{
void stopwatch_example() {
spdlog::stopwatch sw;
std::this_thread::sleep_for(std::chrono::milliseconds(123));
spdlog::info("Stopwatch: {} seconds", sw);
}
#include "spdlog/sinks/udp_sink.h"
void udp_example()
{
void udp_example() {
spdlog::sinks::udp_sink_config cfg("127.0.0.1", 11091);
auto my_logger = spdlog::udp_logger_mt("udplog", cfg);
my_logger->set_level(spdlog::level::debug);
@@ -257,13 +245,13 @@ void udp_example()
}
// A logger with multiple sinks (stdout and file) - each with a different format and log level.
void multi_sink_example()
{
void multi_sink_example() {
auto console_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt>();
console_sink->set_level(spdlog::level::warn);
console_sink->set_pattern("[multi_sink_example] [%^%l%$] %v");
auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>("logs/multisink.txt", true);
auto file_sink =
std::make_shared<spdlog::sinks::basic_file_sink_mt>("logs/multisink.txt", true);
file_sink->set_level(spdlog::level::trace);
spdlog::logger logger("multi_sink", {console_sink, file_sink});
@@ -273,51 +261,43 @@ void multi_sink_example()
}
// User defined types logging
struct my_type
{
struct my_type {
int i = 0;
explicit my_type(int i)
: i(i){};
};
#ifndef SPDLOG_USE_STD_FORMAT // when using fmtlib
template<>
struct fmt::formatter<my_type> : fmt::formatter<std::string>
{
auto format(my_type my, format_context &ctx) -> decltype(ctx.out())
{
template <>
struct fmt::formatter<my_type> : fmt::formatter<std::string> {
auto format(my_type my, format_context &ctx) -> decltype(ctx.out()) {
return fmt::format_to(ctx.out(), "[my_type i={}]", my.i);
}
};
#else // when using std::format
template<>
struct std::formatter<my_type> : std::formatter<std::string>
{
auto format(my_type my, format_context &ctx) const -> decltype(ctx.out())
{
template <>
struct std::formatter<my_type> : std::formatter<std::string> {
auto format(my_type my, format_context &ctx) const -> decltype(ctx.out()) {
return format_to(ctx.out(), "[my_type i={}]", my.i);
}
};
#endif
void user_defined_example()
{
spdlog::info("user defined type: {}", my_type(14));
}
void user_defined_example() { spdlog::info("user defined type: {}", my_type(14)); }
// Custom error handler. Will be triggered on log failure.
void err_handler_example()
{
void err_handler_example() {
// can be set globally or per logger(logger->set_error_handler(..))
spdlog::set_error_handler([](const std::string &msg) { printf("*** Custom log error handler: %s ***\n", msg.c_str()); });
spdlog::set_error_handler([](const std::string &msg) {
printf("*** Custom log error handler: %s ***\n", msg.c_str());
});
}
// syslog example (linux/osx/freebsd)
#ifndef _WIN32
# include "spdlog/sinks/syslog_sink.h"
void syslog_example()
{
#include "spdlog/sinks/syslog_sink.h"
void syslog_example() {
std::string ident = "spdlog-example";
auto syslog_logger = spdlog::syslog_logger_mt("syslog", ident, LOG_PID);
syslog_logger->warn("This is warning that will end up in syslog.");
@@ -326,9 +306,8 @@ void syslog_example()
// Android example.
#if defined(__ANDROID__)
# include "spdlog/sinks/android_sink.h"
void android_example()
{
#include "spdlog/sinks/android_sink.h"
void android_example() {
std::string tag = "spdlog-android";
auto android_logger = spdlog::android_logger_mt("android", tag);
android_logger->critical("Use \"adb shell logcat\" to view this message.");
@@ -338,36 +317,34 @@ void android_example()
// Log patterns can contain custom flags.
// this will add custom flag '%*' which will be bound to a <my_formatter_flag> instance
#include "spdlog/pattern_formatter.h"
class my_formatter_flag : public spdlog::custom_flag_formatter
{
class my_formatter_flag : public spdlog::custom_flag_formatter {
public:
void format(const spdlog::details::log_msg &, const std::tm &, spdlog::memory_buf_t &dest) override
{
void
format(const spdlog::details::log_msg &, const std::tm &, spdlog::memory_buf_t &dest) override {
std::string some_txt = "custom-flag";
dest.append(some_txt.data(), some_txt.data() + some_txt.size());
}
std::unique_ptr<custom_flag_formatter> clone() const override
{
std::unique_ptr<custom_flag_formatter> clone() const override {
return spdlog::details::make_unique<my_formatter_flag>();
}
};
void custom_flags_example()
{
void custom_flags_example() {
using spdlog::details::make_unique; // for pre c++14
auto formatter = make_unique<spdlog::pattern_formatter>();
formatter->add_flag<my_formatter_flag>('*').set_pattern("[%n] [%*] [%^%l%$] %v");
// set the new formatter using spdlog::set_formatter(formatter) or logger->set_formatter(formatter)
// spdlog::set_formatter(std::move(formatter));
// set the new formatter using spdlog::set_formatter(formatter) or
// logger->set_formatter(formatter) spdlog::set_formatter(std::move(formatter));
}
void file_events_example()
{
void file_events_example() {
// pass the spdlog::file_event_handlers to file sinks for open/close log file notifications
spdlog::file_event_handlers handlers;
handlers.before_open = [](spdlog::filename_t filename) { spdlog::info("Before opening {}", filename); };
handlers.before_open = [](spdlog::filename_t filename) {
spdlog::info("Before opening {}", filename);
};
handlers.after_open = [](spdlog::filename_t filename, std::FILE *fstream) {
spdlog::info("After opening {}", filename);
fputs("After opening\n", fstream);
@@ -376,18 +353,21 @@ void file_events_example()
spdlog::info("Before closing {}", filename);
fputs("Before closing\n", fstream);
};
handlers.after_close = [](spdlog::filename_t filename) { spdlog::info("After closing {}", filename); };
auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>("logs/events-sample.txt", true, handlers);
handlers.after_close = [](spdlog::filename_t filename) {
spdlog::info("After closing {}", filename);
};
auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>("logs/events-sample.txt",
true, handlers);
spdlog::logger my_logger("some_logger", file_sink);
my_logger.info("Some log line");
}
void replace_default_logger_example()
{
void replace_default_logger_example() {
// store the old logger so we don't break other examples.
auto old_logger = spdlog::default_logger();
auto new_logger = spdlog::basic_logger_mt("new_default_logger", "logs/new-default-log.txt", true);
auto new_logger =
spdlog::basic_logger_mt("new_default_logger", "logs/new-default-log.txt", true);
spdlog::set_default_logger(new_logger);
spdlog::set_level(spdlog::level::info);
spdlog::debug("This message should not be displayed!");