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loguru.cpp
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loguru.cpp
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#ifndef _WIN32
// 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-compare"
#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"
#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 <chrono>
#include <cstdarg>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <mutex>
#include <regex>
#include <string>
#include <thread>
#include <vector>
#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
#elif defined(__rtems__) || defined(__ANDROID__)
#define LOGURU_PTHREADS 1
#define LOGURU_WINTHREADS 0
#ifndef LOGURU_STACKTRACES
#define LOGURU_STACKTRACES 0
#endif
#else
#define LOGURU_PTHREADS 1
#define LOGURU_WINTHREADS 0
#ifndef LOGURU_STACKTRACES
#define LOGURU_STACKTRACES 1
#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. */
#define LOGURU_PTLS_NAMES 1
#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
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 = 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 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 (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);
#if LOGURU_PTLS_NAMES
static pthread_once_t s_pthread_key_once = PTHREAD_ONCE_INIT;
static pthread_key_t s_pthread_key_name;
void make_pthread_key_name()
{
(void)pthread_key_create(&s_pthread_key_name, free);
}
#endif
// ------------------------------------------------------------------------------
// 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 '%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 '%s' due to '%s'", file_abs->path, why.c_str());
} else {
VLOG_F(g_internal_verbosity, "Reopening file '%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 '%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 '%s'", file_abs->path);
} else {
stat(file_abs->path, &file_abs->st);
}
file_abs->is_reopening = false;
}
}
#endif
// ------------------------------------------------------------------------------
// Helpers:
Text::~Text() { free(_str); }
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: '%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;
}
// 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);
if (strncmp(cmd, verbosity_flag, arg_len) == 0 && !std::isalpha(cmd[arg_len], std::locale(""))) {
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 %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 '%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();
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 char* verbosity_flag)
{
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: %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 (verbosity_flag) {
parse_args(argc, argv, verbosity_flag);
}
#if LOGURU_PTLS_NAMES || LOGURU_WINTHREADS
set_thread_name("main thread");
#elif LOGURU_PTHREADS
char old_thread_name[16] = {0};
auto this_thread = pthread_self();
#if defined(__APPLE__) || defined(__linux__)
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");
#elif defined(__FreeBSD__) || defined(__OpenBSD__)
pthread_set_name_np(this_thread, "main thread");
#elif defined(__linux__)
pthread_setname_np(this_thread, "main thread");
#endif
}
#endif // LOGURU_PTHREADS
if (g_stderr_verbosity >= Verbosity_INFO) {
if (g_preamble) {
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: %s", s_arguments.c_str());
if (strlen(s_current_dir) != 0)
{
VLOG_F(g_internal_verbosity, "Current dir: %s", s_current_dir);
}
VLOG_F(g_internal_verbosity, "stderr verbosity: %d", g_stderr_verbosity);
VLOG_F(g_internal_verbosity, "-----------------------------------");
install_signal_handlers();
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, size_t 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 _WIN32
auto user_profile = getenv("USERPROFILE");
CHECK_F(user_profile != nullptr, "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 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';
}
}
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);
}
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 '%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 '%s'", path);
}
const char* mode_str = (mode == FileMode::Truncate ? "w" : "a");
auto file = fopen(path, mode_str);
if (!file) {
LOG_F(ERROR, "Failed to open '%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) {
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 '%s', mode: '%s', verbosity: %d", path, mode_str, verbosity);
return true;
}
// 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 '%s'", id);
return false;
}
}
void remove_all_callbacks()
{
std::lock_guard<std::recursive_mutex> lock(s_mutex);
for (auto& callback : s_callbacks) {
if (callback.close) {
callback.close(callback.user_data);
}
}
s_callbacks.clear();
on_callback_change();
}
// Returns the maximum of g_stderr_verbosity and all file/custom outputs.
Verbosity current_verbosity_cutoff()
{
return g_stderr_verbosity > s_max_out_verbosity ?
g_stderr_verbosity : s_max_out_verbosity;
}
#if LOGURU_WINTHREADS
char* get_thread_name_win32()
{
__declspec( thread ) static char thread_name[LOGURU_THREADNAME_WIDTH + 1] = {0};
return &thread_name[0];
}
#endif // LOGURU_WINTHREADS
void set_thread_name(const char* name)
{
#if LOGURU_PTLS_NAMES
(void)pthread_once(&s_pthread_key_once, make_pthread_key_name);
(void)pthread_setspecific(s_pthread_key_name, STRDUP(name));
#elif LOGURU_PTHREADS
#ifdef __APPLE__
pthread_setname_np(name);
#elif defined(__FreeBSD__) || defined(__OpenBSD__)
pthread_set_name_np(pthread_self(), name);
#elif defined(__linux__)
pthread_setname_np(pthread_self(), name);
#endif
#elif LOGURU_WINTHREADS
strncpy_s(get_thread_name_win32(), LOGURU_THREADNAME_WIDTH + 1, name, _TRUNCATE);
#else // LOGURU_PTHREADS
(void)name;
#endif // LOGURU_PTHREADS
}
#if LOGURU_PTLS_NAMES
const char* get_thread_name_ptls()
{
(void)pthread_once(&s_pthread_key_once, make_pthread_key_name);
return static_cast<const char*>(pthread_getspecific(s_pthread_key_name));
}
#endif // LOGURU_PTLS_NAMES
void get_thread_name(char* buffer, unsigned long long length, bool right_align_hext_id)
{
#ifdef _WIN32
(void)right_align_hext_id;
#endif
CHECK_NE_F(length, 0u, "Zero length buffer in get_thread_name");
CHECK_NOTNULL_F(buffer, "nullptr in get_thread_name");
#if LOGURU_PTHREADS
auto thread = pthread_self();
#if LOGURU_PTLS_NAMES
if (const char* name = get_thread_name_ptls()) {
snprintf(buffer, length, "%s", name);
} else {
buffer[0] = 0;
}
#elif defined(__APPLE__) || defined(__linux__)
pthread_getname_np(thread, buffer, length);
#else
buffer[0] = 0;
#endif
if (buffer[0] == 0) {
#ifdef __APPLE__
uint64_t thread_id;
pthread_threadid_np(thread, &thread_id);
#elif defined(__FreeBSD__)
long thread_id;
(void)thr_self(&thread_id);
#elif defined(__OpenBSD__)
unsigned thread_id = -1;
#else
uint64_t thread_id = thread;
#endif
if (right_align_hext_id) {
snprintf(buffer, length, "%*X", static_cast<int>(length - 1), static_cast<unsigned>(thread_id));
} else {
snprintf(buffer, length, "%X", static_cast<unsigned>(thread_id));
}
}
#elif LOGURU_WINTHREADS
if (const char* name = get_thread_name_win32()) {
snprintf(buffer, (size_t)length, "%s", name);
} else {
buffer[0] = 0;
}
#else // !LOGURU_WINTHREADS && !LOGURU_WINTHREADS
buffer[0] = 0;
#endif
}
// ------------------------------------------------------------------------
// Stack traces
#if LOGURU_STACKTRACES
Text demangle(const char* name)
{
int status = -1;
char* demangled = abi::__cxa_demangle(name, 0, 0, &status);
Text result{status == 0 ? demangled : STRDUP(name)};
return result;
}
#if LOGURU_RTTI
template <class T>
std::string type_name()
{