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loguru.cpp
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loguru.cpp
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#if defined(__GNUC__) || defined(__clang__)
// Disable all warnings from gcc/clang:
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpragmas"
#pragma GCC diagnostic ignored "-Wc++98-compat"
#pragma GCC diagnostic ignored "-Wc++98-compat-pedantic"
#pragma GCC diagnostic ignored "-Wexit-time-destructors"
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
#pragma GCC diagnostic ignored "-Wglobal-constructors"
#pragma GCC diagnostic ignored "-Wgnu-zero-variadic-macro-arguments"
#pragma GCC diagnostic ignored "-Wmissing-prototypes"
#pragma GCC diagnostic ignored "-Wpadded"
#pragma GCC diagnostic ignored "-Wsign-conversion"
#pragma GCC diagnostic ignored "-Wunknown-pragmas"
#pragma GCC diagnostic ignored "-Wunused-macros"
#pragma GCC diagnostic ignored "-Wzero-as-null-pointer-constant"
#elif defined(_MSC_VER)
#pragma warning(push)
#pragma warning(disable:4365) // conversion from 'X' to 'Y', signed/unsigned mismatch
#endif
#include "loguru.hpp"
#ifndef LOGURU_HAS_BEEN_IMPLEMENTED
#define LOGURU_HAS_BEEN_IMPLEMENTED
#define LOGURU_PREAMBLE_WIDTH (53 + LOGURU_THREADNAME_WIDTH + LOGURU_FILENAME_WIDTH)
#undef min
#undef max
#include <algorithm>
#include <atomic>
#include <cctype>
#include <chrono>
#include <cstdarg>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <mutex>
#include <regex>
#include <string>
#include <thread>
#include <vector>
#if LOGURU_SYSLOG
#include <syslog.h>
#else
#define LOG_USER 0
#endif
#ifdef _WIN32
#include <direct.h>
#define localtime_r(a, b) localtime_s(b, a) // No localtime_r with MSVC, but arguments are swapped for localtime_s
#else
#include <signal.h>
#include <sys/stat.h> // mkdir
#include <unistd.h> // STDERR_FILENO
#endif
#ifdef __linux__
#include <linux/limits.h> // PATH_MAX
#elif !defined(_WIN32)
#include <limits.h> // PATH_MAX
#endif
#ifndef PATH_MAX
#define PATH_MAX 1024
#endif
#ifdef __APPLE__
#include "TargetConditionals.h"
#endif
// TODO: use defined(_POSIX_VERSION) for some of these things?
#if defined(_WIN32) || defined(__CYGWIN__)
#define LOGURU_PTHREADS 0
#define LOGURU_WINTHREADS 1
#ifndef LOGURU_STACKTRACES
#define LOGURU_STACKTRACES 0
#endif
#else
#define LOGURU_PTHREADS 1
#define LOGURU_WINTHREADS 0
#ifdef __GLIBC__
#ifndef LOGURU_STACKTRACES
#define LOGURU_STACKTRACES 1
#endif
#else
#ifndef LOGURU_STACKTRACES
#define LOGURU_STACKTRACES 0
#endif
#endif
#endif
#if LOGURU_STACKTRACES
#include <cxxabi.h> // for __cxa_demangle
#include <dlfcn.h> // for dladdr
#include <execinfo.h> // for backtrace
#endif // LOGURU_STACKTRACES
#if LOGURU_PTHREADS
#include <pthread.h>
#if defined(__FreeBSD__)
#include <pthread_np.h>
#include <sys/thr.h>
#elif defined(__OpenBSD__)
#include <pthread_np.h>
#endif
#ifdef __linux__
/* On Linux, the default thread name is the same as the name of the binary.
Additionally, all new threads inherit the name of the thread it got forked from.
For this reason, Loguru use the pthread Thread Local Storage
for storing thread names on Linux. */
#ifndef LOGURU_PTLS_NAMES
#define LOGURU_PTLS_NAMES 1
#endif
#endif
#endif
#if LOGURU_WINTHREADS
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0502
#endif
#define WIN32_LEAN_AND_MEAN
#define NOMINMAX
#include <windows.h>
#endif
#ifndef LOGURU_PTLS_NAMES
#define LOGURU_PTLS_NAMES 0
#endif
LOGURU_ANONYMOUS_NAMESPACE_BEGIN
namespace loguru
{
using namespace std::chrono;
#if LOGURU_WITH_FILEABS
struct FileAbs
{
char path[PATH_MAX];
char mode_str[4];
Verbosity verbosity;
struct stat st;
FILE* fp;
bool is_reopening = false; // to prevent recursive call in file_reopen.
decltype(steady_clock::now()) last_check_time = steady_clock::now();
};
#else
typedef FILE* FileAbs;
#endif
struct Callback
{
std::string id;
log_handler_t callback;
void* user_data;
Verbosity verbosity; // Does not change!
close_handler_t close;
flush_handler_t flush;
unsigned indentation;
};
using CallbackVec = std::vector<Callback>;
using StringPair = std::pair<std::string, std::string>;
using StringPairList = std::vector<StringPair>;
const auto s_start_time = steady_clock::now();
Verbosity g_stderr_verbosity = Verbosity_0;
bool g_colorlogtostderr = true;
unsigned g_flush_interval_ms = 0;
bool g_preamble_header = true;
bool g_preamble = true;
Verbosity g_internal_verbosity = Verbosity_0;
// Preamble details
bool g_preamble_date = true;
bool g_preamble_time = true;
bool g_preamble_uptime = true;
bool g_preamble_thread = true;
bool g_preamble_file = true;
bool g_preamble_verbose = true;
bool g_preamble_pipe = true;
static std::recursive_mutex s_mutex;
static Verbosity s_max_out_verbosity = Verbosity_OFF;
static std::string s_argv0_filename;
static std::string s_arguments;
static char s_current_dir[PATH_MAX];
static CallbackVec s_callbacks;
static fatal_handler_t s_fatal_handler = nullptr;
static verbosity_to_name_t s_verbosity_to_name_callback = nullptr;
static name_to_verbosity_t s_name_to_verbosity_callback = nullptr;
static StringPairList s_user_stack_cleanups;
static bool s_strip_file_path = true;
static std::atomic<unsigned> s_stderr_indentation { 0 };
// For periodic flushing:
static std::thread* s_flush_thread = nullptr;
static bool s_needs_flushing = false;
static SignalOptions s_signal_options = SignalOptions::none();
static const bool s_terminal_has_color = [](){
#ifdef _WIN32
#ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x0004
#endif
HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
if (hOut != INVALID_HANDLE_VALUE) {
DWORD dwMode = 0;
GetConsoleMode(hOut, &dwMode);
dwMode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
return SetConsoleMode(hOut, dwMode) != 0;
}
return false;
#else
if (!isatty(STDERR_FILENO)) {
return false;
}
if (const char* term = getenv("TERM")) {
return 0 == strcmp(term, "cygwin")
|| 0 == strcmp(term, "linux")
|| 0 == strcmp(term, "rxvt-unicode-256color")
|| 0 == strcmp(term, "screen")
|| 0 == strcmp(term, "screen-256color")
|| 0 == strcmp(term, "screen.xterm-256color")
|| 0 == strcmp(term, "tmux-256color")
|| 0 == strcmp(term, "xterm")
|| 0 == strcmp(term, "xterm-256color")
|| 0 == strcmp(term, "xterm-termite")
|| 0 == strcmp(term, "xterm-color");
} else {
return false;
}
#endif
}();
static void print_preamble_header(char* out_buff, size_t out_buff_size);
// ------------------------------------------------------------------------------
// Colors
bool terminal_has_color() { return s_terminal_has_color; }
// Colors
#ifdef _WIN32
#define VTSEQ(ID) ("\x1b[1;" #ID "m")
#else
#define VTSEQ(ID) ("\x1b[" #ID "m")
#endif
const char* terminal_black() { return s_terminal_has_color ? VTSEQ(30) : ""; }
const char* terminal_red() { return s_terminal_has_color ? VTSEQ(31) : ""; }
const char* terminal_green() { return s_terminal_has_color ? VTSEQ(32) : ""; }
const char* terminal_yellow() { return s_terminal_has_color ? VTSEQ(33) : ""; }
const char* terminal_blue() { return s_terminal_has_color ? VTSEQ(34) : ""; }
const char* terminal_purple() { return s_terminal_has_color ? VTSEQ(35) : ""; }
const char* terminal_cyan() { return s_terminal_has_color ? VTSEQ(36) : ""; }
const char* terminal_light_gray() { return s_terminal_has_color ? VTSEQ(37) : ""; }
const char* terminal_white() { return s_terminal_has_color ? VTSEQ(37) : ""; }
const char* terminal_light_red() { return s_terminal_has_color ? VTSEQ(91) : ""; }
const char* terminal_dim() { return s_terminal_has_color ? VTSEQ(2) : ""; }
// Formating
const char* terminal_bold() { return s_terminal_has_color ? VTSEQ(1) : ""; }
const char* terminal_underline() { return s_terminal_has_color ? VTSEQ(4) : ""; }
// You should end each line with this!
const char* terminal_reset() { return s_terminal_has_color ? VTSEQ(0) : ""; }
// ------------------------------------------------------------------------------
#if LOGURU_WITH_FILEABS
void file_reopen(void* user_data);
inline FILE* to_file(void* user_data) { return reinterpret_cast<FileAbs*>(user_data)->fp; }
#else
inline FILE* to_file(void* user_data) { return reinterpret_cast<FILE*>(user_data); }
#endif
void file_log(void* user_data, const Message& message)
{
#if LOGURU_WITH_FILEABS
FileAbs* file_abs = reinterpret_cast<FileAbs*>(user_data);
if (file_abs->is_reopening) {
return;
}
// It is better checking file change every minute/hour/day,
// instead of doing this every time we log.
// Here check_interval is set to zero to enable checking every time;
const auto check_interval = seconds(0);
if (duration_cast<seconds>(steady_clock::now() - file_abs->last_check_time) > check_interval) {
file_abs->last_check_time = steady_clock::now();
file_reopen(user_data);
}
FILE* file = to_file(user_data);
if (!file) {
return;
}
#else
FILE* file = to_file(user_data);
#endif
fprintf(file, "%s%s%s%s\n",
message.preamble, message.indentation, message.prefix, message.message);
if (g_flush_interval_ms == 0) {
fflush(file);
}
}
void file_close(void* user_data)
{
FILE* file = to_file(user_data);
if (file) {
fclose(file);
}
#if LOGURU_WITH_FILEABS
delete reinterpret_cast<FileAbs*>(user_data);
#endif
}
void file_flush(void* user_data)
{
FILE* file = to_file(user_data);
fflush(file);
}
#if LOGURU_WITH_FILEABS
void file_reopen(void* user_data)
{
FileAbs * file_abs = reinterpret_cast<FileAbs*>(user_data);
struct stat st;
int ret;
if (!file_abs->fp || (ret = stat(file_abs->path, &st)) == -1 || (st.st_ino != file_abs->st.st_ino)) {
file_abs->is_reopening = true;
if (file_abs->fp) {
fclose(file_abs->fp);
}
if (!file_abs->fp) {
VLOG_F(g_internal_verbosity, "Reopening file '" LOGURU_FMT(s) "' due to previous error", file_abs->path);
}
else if (ret < 0) {
const auto why = errno_as_text();
VLOG_F(g_internal_verbosity, "Reopening file '" LOGURU_FMT(s) "' due to '" LOGURU_FMT(s) "'", file_abs->path, why.c_str());
} else {
VLOG_F(g_internal_verbosity, "Reopening file '" LOGURU_FMT(s) "' due to file changed", file_abs->path);
}
// try reopen current file.
if (!create_directories(file_abs->path)) {
LOG_F(ERROR, "Failed to create directories to '" LOGURU_FMT(s) "'", file_abs->path);
}
file_abs->fp = fopen(file_abs->path, file_abs->mode_str);
if (!file_abs->fp) {
LOG_F(ERROR, "Failed to open '" LOGURU_FMT(s) "'", file_abs->path);
} else {
stat(file_abs->path, &file_abs->st);
}
file_abs->is_reopening = false;
}
}
#endif
// ------------------------------------------------------------------------------
// ------------------------------------------------------------------------------
#if LOGURU_SYSLOG
void syslog_log(void* /*user_data*/, const Message& message)
{
/*
Level 0: Is reserved for kernel panic type situations.
Level 1: Is for Major resource failure.
Level 2->7 Application level failures
*/
int level;
if (message.verbosity < Verbosity_FATAL) {
level = 1; // System Alert
} else {
switch(message.verbosity) {
case Verbosity_FATAL: level = 2; break; // System Critical
case Verbosity_ERROR: level = 3; break; // System Error
case Verbosity_WARNING: level = 4; break; // System Warning
case Verbosity_INFO: level = 5; break; // System Notice
case Verbosity_1: level = 6; break; // System Info
default: level = 7; break; // System Debug
}
}
// Note: We don't add the time info.
// This is done automatically by the syslog deamon.
// Otherwise log all information that the file log does.
syslog(level, "%s%s%s", message.indentation, message.prefix, message.message);
}
void syslog_close(void* /*user_data*/)
{
closelog();
}
void syslog_flush(void* /*user_data*/)
{}
#endif
// ------------------------------------------------------------------------------
// Helpers:
Text::~Text() { free(_str); }
#if LOGURU_USE_FMTLIB
Text vtextprintf(const char* format, fmt::format_args args)
{
return Text(STRDUP(fmt::vformat(format, args).c_str()));
}
#else
LOGURU_PRINTF_LIKE(1, 0)
static Text vtextprintf(const char* format, va_list vlist)
{
#ifdef _WIN32
int bytes_needed = _vscprintf(format, vlist);
CHECK_F(bytes_needed >= 0, "Bad string format: '%s'", format);
char* buff = (char*)malloc(bytes_needed+1);
vsnprintf(buff, bytes_needed+1, format, vlist);
return Text(buff);
#else
char* buff = nullptr;
int result = vasprintf(&buff, format, vlist);
CHECK_F(result >= 0, "Bad string format: '" LOGURU_FMT(s) "'", format);
return Text(buff);
#endif
}
Text textprintf(const char* format, ...)
{
va_list vlist;
va_start(vlist, format);
auto result = vtextprintf(format, vlist);
va_end(vlist);
return result;
}
#endif
// Overloaded for variadic template matching.
Text textprintf()
{
return Text(static_cast<char*>(calloc(1, 1)));
}
static const char* indentation(unsigned depth)
{
static const char buff[] =
". . . . . . . . . . " ". . . . . . . . . . "
". . . . . . . . . . " ". . . . . . . . . . "
". . . . . . . . . . " ". . . . . . . . . . "
". . . . . . . . . . " ". . . . . . . . . . "
". . . . . . . . . . " ". . . . . . . . . . ";
static const size_t INDENTATION_WIDTH = 4;
static const size_t NUM_INDENTATIONS = (sizeof(buff) - 1) / INDENTATION_WIDTH;
depth = std::min<unsigned>(depth, NUM_INDENTATIONS);
return buff + INDENTATION_WIDTH * (NUM_INDENTATIONS - depth);
}
static void parse_args(int& argc, char* argv[], const char* verbosity_flag)
{
int arg_dest = 1;
int out_argc = argc;
for (int arg_it = 1; arg_it < argc; ++arg_it) {
auto cmd = argv[arg_it];
auto arg_len = strlen(verbosity_flag);
bool last_is_alpha = false;
#if LOGURU_USE_LOCALE
try { // locale variant of isalpha will throw on error
last_is_alpha = std::isalpha(cmd[arg_len], std::locale(""));
}
catch (...) {
last_is_alpha = std::isalpha(static_cast<int>(cmd[arg_len]));
}
#else
last_is_alpha = std::isalpha(static_cast<int>(cmd[arg_len]));
#endif
if (strncmp(cmd, verbosity_flag, arg_len) == 0 && !last_is_alpha) {
out_argc -= 1;
auto value_str = cmd + arg_len;
if (value_str[0] == '\0') {
// Value in separate argument
arg_it += 1;
CHECK_LT_F(arg_it, argc, "Missing verbosiy level after " LOGURU_FMT(s) "", verbosity_flag);
value_str = argv[arg_it];
out_argc -= 1;
}
if (*value_str == '=') { value_str += 1; }
auto req_verbosity = get_verbosity_from_name(value_str);
if (req_verbosity != Verbosity_INVALID) {
g_stderr_verbosity = req_verbosity;
} else {
char* end = 0;
g_stderr_verbosity = static_cast<int>(strtol(value_str, &end, 10));
CHECK_F(end && *end == '\0',
"Invalid verbosity. Expected integer, INFO, WARNING, ERROR or OFF, got '" LOGURU_FMT(s) "'", value_str);
}
} else {
argv[arg_dest++] = argv[arg_it];
}
}
argc = out_argc;
argv[argc] = nullptr;
}
static long long now_ns()
{
return duration_cast<nanoseconds>(high_resolution_clock::now().time_since_epoch()).count();
}
// Returns the part of the path after the last / or \ (if any).
const char* filename(const char* path)
{
for (auto ptr = path; *ptr; ++ptr) {
if (*ptr == '/' || *ptr == '\\') {
path = ptr + 1;
}
}
return path;
}
// ------------------------------------------------------------------------------
static void on_atexit()
{
VLOG_F(g_internal_verbosity, "atexit");
flush();
}
static void install_signal_handlers(const SignalOptions& signal_options);
static void write_hex_digit(std::string& out, unsigned num)
{
DCHECK_LT_F(num, 16u);
if (num < 10u) { out.push_back(char('0' + num)); }
else { out.push_back(char('A' + num - 10)); }
}
static void write_hex_byte(std::string& out, uint8_t n)
{
write_hex_digit(out, n >> 4u);
write_hex_digit(out, n & 0x0f);
}
static void escape(std::string& out, const std::string& str)
{
for (char c : str) {
/**/ if (c == '\a') { out += "\\a"; }
else if (c == '\b') { out += "\\b"; }
else if (c == '\f') { out += "\\f"; }
else if (c == '\n') { out += "\\n"; }
else if (c == '\r') { out += "\\r"; }
else if (c == '\t') { out += "\\t"; }
else if (c == '\v') { out += "\\v"; }
else if (c == '\\') { out += "\\\\"; }
else if (c == '\'') { out += "\\\'"; }
else if (c == '\"') { out += "\\\""; }
else if (c == ' ') { out += "\\ "; }
else if (0 <= c && c < 0x20) { // ASCI control character:
// else if (c < 0x20 || c != (c & 127)) { // ASCII control character or UTF-8:
out += "\\x";
write_hex_byte(out, static_cast<uint8_t>(c));
} else { out += c; }
}
}
Text errno_as_text()
{
char buff[256];
#if defined(__GLIBC__) && defined(_GNU_SOURCE)
// GNU Version
return Text(STRDUP(strerror_r(errno, buff, sizeof(buff))));
#elif defined(__APPLE__) || _POSIX_C_SOURCE >= 200112L
// XSI Version
strerror_r(errno, buff, sizeof(buff));
return Text(strdup(buff));
#elif defined(_WIN32)
strerror_s(buff, sizeof(buff), errno);
return Text(STRDUP(buff));
#else
// Not thread-safe.
return Text(STRDUP(strerror(errno)));
#endif
}
void init(int& argc, char* argv[], const Options& options)
{
CHECK_GT_F(argc, 0, "Expected proper argc/argv");
CHECK_EQ_F(argv[argc], nullptr, "Expected proper argc/argv");
s_argv0_filename = filename(argv[0]);
#ifdef _WIN32
#define getcwd _getcwd
#endif
if (!getcwd(s_current_dir, sizeof(s_current_dir))) {
const auto error_text = errno_as_text();
LOG_F(WARNING, "Failed to get current working directory: " LOGURU_FMT(s) "", error_text.c_str());
}
s_arguments = "";
for (int i = 0; i < argc; ++i) {
escape(s_arguments, argv[i]);
if (i + 1 < argc) {
s_arguments += " ";
}
}
if (options.verbosity_flag) {
parse_args(argc, argv, options.verbosity_flag);
}
if (const auto main_thread_name = options.main_thread_name) {
#if LOGURU_PTLS_NAMES || LOGURU_WINTHREADS
set_thread_name(main_thread_name);
#elif LOGURU_PTHREADS
char old_thread_name[16] = {0};
auto this_thread = pthread_self();
#if defined(__APPLE__) || defined(__linux__) || defined(__sun)
pthread_getname_np(this_thread, old_thread_name, sizeof(old_thread_name));
#endif
if (old_thread_name[0] == 0) {
#ifdef __APPLE__
pthread_setname_np(main_thread_name);
#elif defined(__FreeBSD__) || defined(__OpenBSD__)
pthread_set_name_np(this_thread, main_thread_name);
#elif defined(__linux__) || defined(__sun)
pthread_setname_np(this_thread, main_thread_name);
#endif
}
#endif // LOGURU_PTHREADS
}
if (g_stderr_verbosity >= Verbosity_INFO) {
if (g_preamble_header) {
char preamble_explain[LOGURU_PREAMBLE_WIDTH];
print_preamble_header(preamble_explain, sizeof(preamble_explain));
if (g_colorlogtostderr && s_terminal_has_color) {
fprintf(stderr, "%s%s%s\n", terminal_reset(), terminal_dim(), preamble_explain);
} else {
fprintf(stderr, "%s\n", preamble_explain);
}
}
fflush(stderr);
}
VLOG_F(g_internal_verbosity, "arguments: " LOGURU_FMT(s) "", s_arguments.c_str());
if (strlen(s_current_dir) != 0)
{
VLOG_F(g_internal_verbosity, "Current dir: " LOGURU_FMT(s) "", s_current_dir);
}
VLOG_F(g_internal_verbosity, "stderr verbosity: " LOGURU_FMT(d) "", g_stderr_verbosity);
VLOG_F(g_internal_verbosity, "-----------------------------------");
install_signal_handlers(options.signal_options);
atexit(on_atexit);
}
void shutdown()
{
VLOG_F(g_internal_verbosity, "loguru::shutdown()");
remove_all_callbacks();
set_fatal_handler(nullptr);
set_verbosity_to_name_callback(nullptr);
set_name_to_verbosity_callback(nullptr);
}
void write_date_time(char* buff, unsigned long long buff_size)
{
auto now = system_clock::now();
long long ms_since_epoch = duration_cast<milliseconds>(now.time_since_epoch()).count();
time_t sec_since_epoch = time_t(ms_since_epoch / 1000);
tm time_info;
localtime_r(&sec_since_epoch, &time_info);
snprintf(buff, buff_size, "%04d%02d%02d_%02d%02d%02d.%03lld",
1900 + time_info.tm_year, 1 + time_info.tm_mon, time_info.tm_mday,
time_info.tm_hour, time_info.tm_min, time_info.tm_sec, ms_since_epoch % 1000);
}
const char* argv0_filename()
{
return s_argv0_filename.c_str();
}
const char* arguments()
{
return s_arguments.c_str();
}
const char* current_dir()
{
return s_current_dir;
}
const char* home_dir()
{
#ifdef __MINGW32__
auto home = getenv("USERPROFILE");
CHECK_F(home != nullptr, "Missing USERPROFILE");
return home;
#elif defined(_WIN32)
char* user_profile;
size_t len;
errno_t err = _dupenv_s(&user_profile, &len, "USERPROFILE");
CHECK_F(err == 0, "Missing USERPROFILE");
return user_profile;
#else // _WIN32
auto home = getenv("HOME");
CHECK_F(home != nullptr, "Missing HOME");
return home;
#endif // _WIN32
}
void suggest_log_path(const char* prefix, char* buff, unsigned long long buff_size)
{
if (prefix[0] == '~') {
snprintf(buff, buff_size - 1, "%s%s", home_dir(), prefix + 1);
} else {
snprintf(buff, buff_size - 1, "%s", prefix);
}
// Check for terminating /
size_t n = strlen(buff);
if (n != 0) {
if (buff[n - 1] != '/') {
CHECK_F(n + 2 < buff_size, "Filename buffer too small");
buff[n] = '/';
buff[n + 1] = '\0';
}
}
#ifdef _WIN32
strncat_s(buff, buff_size - strlen(buff) - 1, s_argv0_filename.c_str(), buff_size - strlen(buff) - 1);
strncat_s(buff, buff_size - strlen(buff) - 1, "/", buff_size - strlen(buff) - 1);
write_date_time(buff + strlen(buff), buff_size - strlen(buff));
strncat_s(buff, buff_size - strlen(buff) - 1, ".log", buff_size - strlen(buff) - 1);
#else
strncat(buff, s_argv0_filename.c_str(), buff_size - strlen(buff) - 1);
strncat(buff, "/", buff_size - strlen(buff) - 1);
write_date_time(buff + strlen(buff), buff_size - strlen(buff));
strncat(buff, ".log", buff_size - strlen(buff) - 1);
#endif
}
bool create_directories(const char* file_path_const)
{
CHECK_F(file_path_const && *file_path_const);
char* file_path = STRDUP(file_path_const);
for (char* p = strchr(file_path + 1, '/'); p; p = strchr(p + 1, '/')) {
*p = '\0';
#ifdef _WIN32
if (_mkdir(file_path) == -1) {
#else
if (mkdir(file_path, 0755) == -1) {
#endif
if (errno != EEXIST) {
LOG_F(ERROR, "Failed to create directory '" LOGURU_FMT(s) "'", file_path);
LOG_IF_F(ERROR, errno == EACCES, "EACCES");
LOG_IF_F(ERROR, errno == ENAMETOOLONG, "ENAMETOOLONG");
LOG_IF_F(ERROR, errno == ENOENT, "ENOENT");
LOG_IF_F(ERROR, errno == ENOTDIR, "ENOTDIR");
LOG_IF_F(ERROR, errno == ELOOP, "ELOOP");
*p = '/';
free(file_path);
return false;
}
}
*p = '/';
}
free(file_path);
return true;
}
bool add_file(const char* path_in, FileMode mode, Verbosity verbosity)
{
char path[PATH_MAX];
if (path_in[0] == '~') {
snprintf(path, sizeof(path) - 1, "%s%s", home_dir(), path_in + 1);
} else {
snprintf(path, sizeof(path) - 1, "%s", path_in);
}
if (!create_directories(path)) {
LOG_F(ERROR, "Failed to create directories to '" LOGURU_FMT(s) "'", path);
}
const char* mode_str = (mode == FileMode::Truncate ? "w" : "a");
FILE* file;
#ifdef _WIN32
file = _fsopen(path, mode_str, _SH_DENYNO);
#else
file = fopen(path, mode_str);
#endif
if (!file) {
LOG_F(ERROR, "Failed to open '" LOGURU_FMT(s) "'", path);
return false;
}
#if LOGURU_WITH_FILEABS
FileAbs* file_abs = new FileAbs(); // this is deleted in file_close;
snprintf(file_abs->path, sizeof(file_abs->path) - 1, "%s", path);
snprintf(file_abs->mode_str, sizeof(file_abs->mode_str) - 1, "%s", mode_str);
stat(file_abs->path, &file_abs->st);
file_abs->fp = file;
file_abs->verbosity = verbosity;
add_callback(path_in, file_log, file_abs, verbosity, file_close, file_flush);
#else
add_callback(path_in, file_log, file, verbosity, file_close, file_flush);
#endif
if (mode == FileMode::Append) {
fprintf(file, "\n\n\n\n\n");
}
if (!s_arguments.empty()) {
fprintf(file, "arguments: %s\n", s_arguments.c_str());
}
if (strlen(s_current_dir) != 0) {
fprintf(file, "Current dir: %s\n", s_current_dir);
}
fprintf(file, "File verbosity level: %d\n", verbosity);
if (g_preamble_header) {
char preamble_explain[LOGURU_PREAMBLE_WIDTH];
print_preamble_header(preamble_explain, sizeof(preamble_explain));
fprintf(file, "%s\n", preamble_explain);
}
fflush(file);
VLOG_F(g_internal_verbosity, "Logging to '" LOGURU_FMT(s) "', mode: '" LOGURU_FMT(s) "', verbosity: " LOGURU_FMT(d) "", path, mode_str, verbosity);
return true;
}
/*
Will add syslog as a standard sink for log messages
Any logging message with a verbosity lower or equal to
the given verbosity will be included.
This works for Unix like systems (i.e. Linux/Mac)
There is no current implementation for Windows (as I don't know the
equivalent calls or have a way to test them). If you know please
add and send a pull request.
The code should still compile under windows but will only generate
a warning message that syslog is unavailable.
Search for LOGURU_SYSLOG to find and fix.
*/
bool add_syslog(const char* app_name, Verbosity verbosity)
{
return add_syslog(app_name, verbosity, LOG_USER);
}
bool add_syslog(const char* app_name, Verbosity verbosity, int facility)
{
#if LOGURU_SYSLOG
if (app_name == nullptr) {
app_name = argv0_filename();
}
openlog(app_name, 0, facility);
add_callback("'syslog'", syslog_log, nullptr, verbosity, syslog_close, syslog_flush);
VLOG_F(g_internal_verbosity, "Logging to 'syslog' , verbosity: " LOGURU_FMT(d) "", verbosity);
return true;
#else
(void)app_name;
(void)verbosity;
(void)facility;
VLOG_F(g_internal_verbosity, "syslog not implemented on this system. Request to install syslog logging ignored.");
return false;
#endif
}
// Will be called right before abort().
void set_fatal_handler(fatal_handler_t handler)
{
s_fatal_handler = handler;
}
fatal_handler_t get_fatal_handler()
{
return s_fatal_handler;
}
void set_verbosity_to_name_callback(verbosity_to_name_t callback)
{
s_verbosity_to_name_callback = callback;
}
void set_name_to_verbosity_callback(name_to_verbosity_t callback)
{
s_name_to_verbosity_callback = callback;
}
void add_stack_cleanup(const char* find_this, const char* replace_with_this)
{
if (strlen(find_this) <= strlen(replace_with_this)) {
LOG_F(WARNING, "add_stack_cleanup: the replacement should be shorter than the pattern!");
return;
}
s_user_stack_cleanups.push_back(StringPair(find_this, replace_with_this));
}
static void on_callback_change()
{
s_max_out_verbosity = Verbosity_OFF;
for (const auto& callback : s_callbacks) {
s_max_out_verbosity = std::max(s_max_out_verbosity, callback.verbosity);
}
}
void add_callback(
const char* id,
log_handler_t callback,
void* user_data,
Verbosity verbosity,
close_handler_t on_close,
flush_handler_t on_flush)
{
std::lock_guard<std::recursive_mutex> lock(s_mutex);
s_callbacks.push_back(Callback{id, callback, user_data, verbosity, on_close, on_flush, 0});
on_callback_change();
}
// Returns a custom verbosity name if one is available, or nullptr.
// See also set_verbosity_to_name_callback.
const char* get_verbosity_name(Verbosity verbosity)
{
auto name = s_verbosity_to_name_callback
? (*s_verbosity_to_name_callback)(verbosity)
: nullptr;
// Use standard replacements if callback fails:
if (!name)
{
if (verbosity <= Verbosity_FATAL) {
name = "FATL";
} else if (verbosity == Verbosity_ERROR) {
name = "ERR";
} else if (verbosity == Verbosity_WARNING) {
name = "WARN";
} else if (verbosity == Verbosity_INFO) {
name = "INFO";
}
}
return name;
}
// Returns Verbosity_INVALID if the name is not found.
// See also set_name_to_verbosity_callback.
Verbosity get_verbosity_from_name(const char* name)
{
auto verbosity = s_name_to_verbosity_callback
? (*s_name_to_verbosity_callback)(name)
: Verbosity_INVALID;
// Use standard replacements if callback fails:
if (verbosity == Verbosity_INVALID) {
if (strcmp(name, "OFF") == 0) {
verbosity = Verbosity_OFF;
} else if (strcmp(name, "INFO") == 0) {
verbosity = Verbosity_INFO;
} else if (strcmp(name, "WARNING") == 0) {
verbosity = Verbosity_WARNING;
} else if (strcmp(name, "ERROR") == 0) {
verbosity = Verbosity_ERROR;
} else if (strcmp(name, "FATAL") == 0) {
verbosity = Verbosity_FATAL;
}
}
return verbosity;
}
bool remove_callback(const char* id)
{
std::lock_guard<std::recursive_mutex> lock(s_mutex);
auto it = std::find_if(begin(s_callbacks), end(s_callbacks), [&](const Callback& c) { return c.id == id; });
if (it != s_callbacks.end()) {
if (it->close) { it->close(it->user_data); }
s_callbacks.erase(it);
on_callback_change();
return true;
} else {
LOG_F(ERROR, "Failed to locate callback with id '" LOGURU_FMT(s) "'", id);
return false;
}
}