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Added sublogs, removed deprecated constructor

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matthias@arch 2022-11-05 20:44:36 +01:00
parent d3e7abc1d2
commit 4a820cb2b2
2 changed files with 203 additions and 95 deletions
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95
src/log.cpp
View File

@ -4,6 +4,7 @@
#include <fstream>
#include <ctime>
#include <ios>
#include <memory>
namespace gz {
namespace fs = std::filesystem;
@ -50,35 +51,65 @@ namespace gz {
#ifdef LOG_MULTITHREAD
// Static member initialization
std::mutex Log::mtx;
#endif
Log::Log(std::string logfile, bool showLog, bool storeLog, std::string&& prefix_, Color prefixColor, bool showTime, Color timeColor, bool clearLogfileOnRestart, unsigned int writeAfterLines)
: iter(0),
writeToFileAfterLines(writeAfterLines), clearLogfileOnRestart(clearLogfileOnRestart),
logFile(logfile), storeLog(storeLog),
showLog(showLog),
prefixColor(prefixColor), prefix(prefix_ + ": "),
showTime(showTime), timeColor(timeColor)
Log::Log()
: showLog(true),
prefixColor(Color::RESET),
prefix("")
{
#ifdef LOG_SUBLOGS
resources = std::make_shared<LogResources>();
#endif
iter() = 0;
writeToFileAfterLines() = 100;
clearLogfileOnRestart() = false;
logFile() = "default.log";
storeLog() = false;
showTime() = false;
timeColor() = Color::RESET;
init();
}
Log::Log(LogCreateInfo&& ci)
: iter(0),
writeToFileAfterLines(ci.writeAfterLines), clearLogfileOnRestart(ci.clearLogfileOnRestart),
logFile(ci.logfile), storeLog(ci.storeLog),
showLog(ci.showLog),
: showLog(ci.showLog),
prefixColor(ci.prefixColor),
prefix(ci.prefix + ": "),
showTime(ci.showTime), timeColor(ci.timeColor)
prefix(ci.prefix)
{
#ifdef LOG_SUBLOGS
resources = std::make_shared<LogResources>();
#endif
iter() = 0;
writeToFileAfterLines() = ci.writeAfterLines;
clearLogfileOnRestart() = ci.clearLogfileOnRestart;
logFile() = ci.logfile;
storeLog() = ci.storeLog;
showTime() = ci.showTime;
timeColor() = ci.timeColor;
init();
}
#ifdef LOG_SUBLOGS
Log Log::createSublog(bool showLog, const std::string& prefix, Color prefixColor) {
return Log(std::shared_ptr<LogResources>(resources), showLog, prefix, prefixColor);
}
Log::Log(std::shared_ptr<LogResources>&& resources_, bool showLog, const std::string& prefix, Color prefixColor)
: resources(std::move(resources_)), showLog(showLog), prefixColor(prefixColor), prefix(prefix)
{
}
#endif
void Log::init() {
// get absolute path to the logfile
fs::path logpath(std::move(logFile));
fs::path logpath(std::move(logFile()));
if (!logpath.is_absolute()) {
logpath = fs::current_path() / logpath;
}
@ -86,30 +117,34 @@ namespace gz {
if (!fs::is_directory(logpath.parent_path())) {
fs::create_directory(logpath.parent_path());
}
logFile = logpath.string();
logFile() = logpath.string();
// if clearLogfileOnRestart, open the file to clear it
if (clearLogfileOnRestart and fs::is_regular_file(logpath)) {
std::ofstream file(logFile, std::ofstream::trunc);
if (clearLogfileOnRestart() and fs::is_regular_file(logpath)) {
std::ofstream file(logFile(), std::ofstream::trunc);
file.close();
}
if (writeToFileAfterLines == 0) { writeToFileAfterLines = 1; }
logLines.resize(writeToFileAfterLines);
if (writeToFileAfterLines() == 0) { writeToFileAfterLines() = 1; }
logLines().resize(writeToFileAfterLines());
// reserve memory for strings
if (LOG_RESERVE_STRING_SIZE > 0) {
for (size_t i = 0; i < logLines.size(); i++) {
logLines[i].reserve(LOG_RESERVE_STRING_SIZE);
for (size_t i = 0; i < logLines().size(); i++) {
logLines()[i].reserve(LOG_RESERVE_STRING_SIZE);
}
}
// reserve memory for argsBegin
argsBegin.reserve(ARG_COUNT_RESERVE_COUNT);
argsBegin().reserve(ARG_COUNT_RESERVE_COUNT);
if (!prefix.empty()) {
prefix += ": ";
}
}
Log::~Log() {
if (storeLog) { writeLog(); }
if (storeLog()) { writeLog(); }
}
@ -118,24 +153,24 @@ namespace gz {
struct std::tm *tmp;
tmp = std::localtime(&t);
// stores the date and time in time: yyyy-mm-dd hh:mm:ss:
std::strftime(time, sizeof(time), "%F %T: ", tmp);
std::strftime(time(), LOG_TIMESTAMP_CHAR_COUNT, "%F %T: ", tmp);
}
void Log::writeLog() {
std::ofstream file(logFile, std::ios_base::app);
std::ofstream file(logFile(), std::ios_base::app);
if (file.is_open()) {
for (std::string message : logLines) {
for (std::string message : logLines()) {
file << message;
}
getTime();
std::string message = time;
message += "Written log to file: " + logFile + "\n";
std::string message = time();
message += "Written log to file: " + logFile() + "\n";
/* file << message; */
if (showLog) { std::cout << message; }
}
else {
std::cout << COLORS[RED] << "LOG ERROR: " << COLORS[RESET] << "Could not open file '" << logFile << "'." << '\n';
std::cout << COLORS[RED] << "LOG ERROR: " << COLORS[RESET] << "Could not open file '" << logFile() << "'." << '\n';
}
file.close();
}

203
src/log.hpp
View File

@ -7,6 +7,14 @@
#include <iostream>
#include <string>
#ifndef LOG_NO_SUBLOGS
#define LOG_SUBLOGS
#endif
#ifdef LOG_SUBLOGS
#include <memory>
#endif
#ifdef LOG_MULTITHREAD
#include <mutex>
#endif
@ -59,6 +67,7 @@ namespace gz {
template<typename T>
concept Logable = ConvertibleToString<T>;
class Log;
/**
* @brief Create info for a Log object
*/
@ -81,8 +90,37 @@ namespace gz {
bool clearLogfileOnRestart = true;
/// @brief Actually write the log to the logfile after so many lines. Must be at least 1
unsigned int writeAfterLines = 100;
#ifdef LOG_SUBLOGS
std::shared_ptr<Log> parent;
#endif
};
#ifdef LOG_SUBLOGS
/**
* @brief Resources that are normally members of Log when not using `LOG_SUBLOGS`
*/
struct LogResources {
/// Where the lines are stored
std::vector<std::string> logLines;
/// Used during log: string views into the single substrings in logLines[currentLine]
std::vector<std::string::size_type> argsBegin;
/// The current position in logLines
size_t iter = 0;
unsigned int writeToFileAfterLines;
bool clearLogfileOnRestart;
/// Absolute path to the logfile
std::string logFile;
bool storeLog;
bool showTime;
Color timeColor;
/// Stores the current time in yyyy-mm-dd hh:mm:ss format
char time[LOG_TIMESTAMP_CHAR_COUNT];
}; // class LogResources
#endif
/**
* @brief Manages printing messages to stdout and to logfiles.
* @details
@ -95,6 +133,14 @@ namespace gz {
* Log can use a static mutex for thread safety. To use this feature, you have to `#define LOG_MULTITHREAD` @b before including `log.hpp`.
* Note that log uses the default std::cout buffer, so you should make sure it is not being used while logging something.
*
* @subsection log_subs Sublogs
* If you want multiple log instances that share a logfile, you can @ref createSublog "create a sublog" from the parent.
* The sublog inherits all settings and resources from the parent, except for showLog and the prefix.
* This feature is not available by default, you need to `#define LOG_SUBLOGS`.
*
* Note that the sublog may outlive the parent, as they @ref LogResources "share their resources" with a shared_ptr.
* You can also create sublogs from sublogs.
*
* @subsection log_logfile Logfile
* The logs can be written to a logfile, which can be specified in the constructor.
* The logs are not continuously written to the logfile, since file operations are expensive.
@ -124,23 +170,26 @@ namespace gz {
class Log {
public:
/**
* @brief Creates a log object, which can print messages to stdout and/or write them to a log file
* @details
* By creating multiple instances with different parameters, logs can be easily turned on/off for different usages.
*
* The overload using LogCreateInfo might be more clear, so I recommend using that.
* @note Colors will only be shown when written to stdout, not in the logfile.
* @deprecated Use the overload using the LogCreateInfo struct
* @brief Create a log with default settings
* @details
* - `showLog = true`
* - `storeLog = false`
* - `prefix = ""`
* - `showTime = false`
*/
Log(std::string logfile="log.log", bool showLog=true, bool storeLog=true, std::string&& prefix="", Color prefixColor=RESET, bool showTime=true, Color timeColor=RESET, bool clearLogfileOnRestart=true, unsigned int writeAfterLines=100);
Log();
/**
* @brief Creates a log object, which can print messages to stdout and/or write them to a log file
* @details
* By creating multiple instances with different parameters, logs can be easily turned on/off for different usages.
*/
Log(LogCreateInfo&& createInfo);
#ifdef LOG_SUBLOGS
Log createSublog(bool showLog, const std::string& prefix, Color prefixColor);
private:
Log(std::shared_ptr<LogResources>&& resources, bool showLog, const std::string& prefix, Color prefixColor);
public:
#endif
~Log();
//
@ -275,40 +324,64 @@ class Log {
private:
void init();
#ifdef LOG_SUBLOGS
std::shared_ptr<LogResources> resources;
std::vector<std::string>& logLines() { return resources->logLines; };
std::vector<std::string::size_type>& argsBegin() { return resources->argsBegin; };
size_t& iter() { return resources->iter; };
unsigned int& writeToFileAfterLines() { return resources->writeToFileAfterLines; };
bool& clearLogfileOnRestart() { return resources->clearLogfileOnRestart; };
std::string& logFile() { return resources->logFile; };
bool& storeLog() { return resources->storeLog; };
bool& showTime() { return resources->showTime; };
Color& timeColor() { return resources->timeColor; };
char* time() { return resources->time; };
#else
/// Where the lines are stored
std::vector<std::string> logLines;
std::vector<std::string> logLines_;
/// Used during log: string views into the single substrings in logLines[currentLine]
std::vector<std::string::size_type> argsBegin;
std::vector<std::string::size_type> argsBegin_;
/// The current position in logLines
size_t iter = 0;
/**
* @name Writing to file
*/
/// @{
size_t iter_ = 0;
/// When iter reaches writeToFileAfterLines, write log to file
unsigned int writeToFileAfterLines;
bool clearLogfileOnRestart;
unsigned int writeToFileAfterLines_;
bool clearLogfileOnRestart_;
/// Absolute path to the logfile
std::string logFile;
bool storeLog;
std::string logFile_;
bool storeLog_;
bool showTime_;
Color timeColor_;
/// Stores the current time in yyyy-mm-dd hh:mm:ss format
char[LOG_TIMESTAMP_CHAR_COUNT] time_;
// getters
std::vector<std::string>& logLines() { return logLines_; };
std::vector<std::string::size_type>& argsBegin() { return argsBegin_; };
size_t& iter() { return iter_; };
unsigned int& writeToFileAfterLines() { return writeToFileAfterLines_; };
bool& clearLogfileOnRestart() { return clearLogfileOnRestart_; };
std::string& logFile() { return logFile_; };
bool& storeLog() { return storeLog_; };
bool& showTime() { return showTime_; };
Color& timeColor() { return timeColor_; };
std::string& time() { return time_; };
#endif
void writeLog();
/// @}
bool showLog;
Color prefixColor;
std::string prefix;
/**
* @name Time
*/
/// @{
bool showTime;
Color timeColor;
/// Stores the current time in yyyy-mm-dd hh:mm:ss format
char time[LOG_TIMESTAMP_CHAR_COUNT];
/// Store the current time in yyyy-mm-dd hh:mm:ss format in time member
void getTime();
/// @}
#ifdef LOG_MULTITHREAD
/// Lock for std::cout
@ -325,31 +398,31 @@ class Log {
#ifdef LOG_MULTITHREAD
mtx.lock();
#endif
argsBegin.clear();
if (showTime) {
argsBegin().clear();
if (showTime()) {
getTime();
logLines[iter] = time;
logLines()[iter()] = time();
}
else {
logLines.clear();
logLines().clear();
}
argsBegin.emplace_back(logLines[iter].size());
logLines[iter] += prefix;
argsBegin().emplace_back(logLines()[iter()].size());
logLines()[iter()] += prefix;
vlog(" ", std::forward<Args>(args)...);
logLines[iter] += "\n";
argsBegin.emplace_back(logLines[iter].size());
logLines()[iter()] += "\n";
argsBegin().emplace_back(logLines()[iter()].size());
if (showLog) {
// time
std::cout << COLORS[timeColor] << std::string_view(logLines[iter].begin(), logLines[iter].begin() + argsBegin[0])
std::cout << COLORS[timeColor()] << std::string_view(logLines()[iter()].begin(), logLines()[iter()].begin() + argsBegin()[0])
// prefix
<< COLORS[prefixColor] << std::string_view(logLines[iter].begin() + argsBegin[0], logLines[iter].begin() + argsBegin[1]) << COLORS[RESET]
<< COLORS[prefixColor] << std::string_view(logLines()[iter()].begin() + argsBegin()[0], logLines()[iter()].begin() + argsBegin()[1]) << COLORS[RESET]
// message
<< std::string_view(logLines[iter].begin() + argsBegin[1], logLines[iter].end());
<< std::string_view(logLines()[iter()].begin() + argsBegin()[1], logLines()[iter()].end());
}
if (++iter >= writeToFileAfterLines) {
iter = 0;
if (++iter() >= writeToFileAfterLines()) {
iter() = 0;
writeLog();
}
#ifdef LOG_MULTITHREAD
@ -363,36 +436,36 @@ class Log {
#ifdef LOG_MULTITHREAD
mtx.lock();
#endif
argsBegin.clear();
if (showTime) {
argsBegin().clear();
if (showTime()) {
getTime();
logLines[iter] = std::string(time);
logLines()[iter()] = std::string(time());
}
else {
logLines.clear();
logLines().clear();
}
argsBegin.emplace_back(logLines[iter].size());
logLines[iter] += prefix;
argsBegin().emplace_back(logLines()[iter()].size());
logLines()[iter()] += prefix;
vlog(" ", std::forward<Args>(args)...);
logLines[iter] += "\n";
argsBegin.emplace_back(logLines[iter].size());
logLines()[iter()] += "\n";
argsBegin().emplace_back(logLines()[iter()].size());
if (showLog) {
// time
std::cout << COLORS[timeColor] << std::string_view(logLines[iter].begin(), logLines[iter].begin() + argsBegin[0])
std::cout << COLORS[timeColor()] << std::string_view(logLines()[iter()].begin(), logLines()[iter()].begin() + argsBegin()[0])
// prefix
<< COLORS[prefixColor] << std::string_view(logLines[iter].begin() + argsBegin[0], logLines[iter].begin() + argsBegin[1]) << COLORS[RESET];
<< COLORS[prefixColor] << std::string_view(logLines()[iter()].begin() + argsBegin()[0], logLines()[iter()].begin() + argsBegin()[1]) << COLORS[RESET];
// max index where i can be used for colors and i+2 can be used for currentViews
size_t maxI = std::min(colors.size(), argsBegin.size() - 2);
size_t maxI = std::min(colors.size(), argsBegin().size() - 2);
for (size_t i = 0; i < maxI; i++) {
std::cout << COLORS[colors[i]] << std::string_view(logLines[iter].begin() + argsBegin[i+1], logLines[iter].begin() + argsBegin[i+2]);
std::cout << COLORS[colors[i]] << std::string_view(logLines()[iter()].begin() + argsBegin()[i+1], logLines()[iter()].begin() + argsBegin()[i+2]);
}
// log the rest, maxI is now <= argsBegin.size() - 2
std::cout << std::string_view(logLines[iter].begin() + argsBegin[maxI+1], logLines[iter].end()) << COLORS[RESET];
std::cout << std::string_view(logLines()[iter()].begin() + argsBegin()[maxI+1], logLines()[iter()].end()) << COLORS[RESET];
}
if (++iter >= writeToFileAfterLines) {
iter = 0;
if (++iter() >= writeToFileAfterLines()) {
iter() = 0;
writeLog();
}
#ifdef LOG_MULTITHREAD
@ -403,17 +476,17 @@ class Log {
template<util::Stringy T, Logable... Args>
void Log::vlog(const char* appendChars, T&& t, Args&&... args) {
argsBegin.emplace_back(logLines[iter].size());
logLines[iter] += std::string(t);
logLines[iter] += appendChars;
argsBegin().emplace_back(logLines()[iter()].size());
logLines()[iter()] += std::string(t);
logLines()[iter()] += appendChars;
vlog(" ", std::forward<Args>(args)...);
}
/// Log anything where toString exists
template<ConvertibleToString T, Logable... Args>
void Log::vlog(const char* appendChars, T&& t, Args&&... args) requires (!util::Stringy<T>) {
argsBegin.emplace_back(logLines[iter].size());
logLines[iter] += toString(t);
logLines[iter] += appendChars;
argsBegin().emplace_back(logLines()[iter()].size());
logLines()[iter()] += toString(t);
logLines()[iter()] += appendChars;
vlog(" ", std::forward<Args>(args)...);
}