Initial logging utility implementation
- Add basic Application logging
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#pragma once
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#include <string>
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/**
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* @brief Basic logging class
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*
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* Defines helper functions for logging facility. Configured in Application::init()
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*
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*/
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class Log
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{
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public:
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enum LogLevel
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{
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FATAL,
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ERROR,
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WARN,
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INFO,
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DEBUG,
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};
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LogLevel level = WARN; ///< Default logging level
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/**
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* @brief Prints message to stdout
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*
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* TODO: write to configurable stream, be it stdout, stderr or even a file
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*
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* @param level the message level
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* @param fmt the message format
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* @param ... variable parameters
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*/
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void log(LogLevel level, const std::string &fmt, ...);
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private:
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inline std::string _getLabel(LogLevel level)
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{
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switch (level)
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{
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case DEBUG: return "DEBUG";
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case INFO: return "INFO ";
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case WARN: return "WARN ";
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case ERROR: return "ERROR";
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case FATAL: return "FATAL";
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default: return "UNK ";
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}
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}
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};
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extern Log LOG; /// Global variable :(
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#define INFO(fmt, ...) LOG.log(Log::INFO, fmt, ##__VA_ARGS__)
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#define WARN(fmt, ...) LOG.log(Log::WARN, fmt, ##__VA_ARGS__)
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#define ERROR(fmt, ...) LOG.log(Log::ERROR, fmt, ##__VA_ARGS__)
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#define FATAL(fmt, ...) LOG.log(Log::FATAL, fmt, ##__VA_ARGS__)
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#define DEBUG(fmt, ...) LOG.log(Log::DEBUG, fmt, ##__VA_ARGS__)
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@ -1,4 +1,5 @@
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#include "application/application.h"
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#include "application/log.h"
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#include "core/gameevent.h"
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#include "core/editor.h"
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@ -9,8 +10,13 @@
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#include "classicmode/classicfactory.h"
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Log LOG;
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bool Application::init()
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{
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LOG.level = Log::DEBUG;
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DEBUG("Initializing Application");
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if (!_core_factory)
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return false;
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@ -48,6 +54,8 @@ void Application::update(const kku::microsec& dt)
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void Application::pushState(GUIState::Tag new_state)
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{
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DEBUG("Pushing state %d", new_state);
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if (!_state_stack.empty())
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_state_stack.back()->leave();
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@ -57,6 +65,7 @@ void Application::pushState(GUIState::Tag new_state)
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void Application::popState()
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{
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DEBUG("Popping state");
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_state_stack.back()->leave();
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_state_stack.pop_back();
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_state_stack.back()->enter();
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#include <cstdarg>
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#include <iostream>
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#include <vector>
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#include "application/log.h"
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void Log::log(LogLevel level, const std::string &fmt, ...) {
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if (level > this->level)
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return;
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va_list args;
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// First va_start: count how many characters are needed for formatting
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va_start(args, fmt);
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size_t len = std::vsnprintf(NULL, 0, fmt.c_str(), args);
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va_end(args);
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std::vector<char> buf(len + 1);
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// Second va_start: actually write formatted message to buffer
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va_start(args, fmt);
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std::vsnprintf(&buf[0], len + 1, fmt.c_str(), args);
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va_end(args);
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std::cout << this->_getLabel(level) << " " << &buf[0] << std::endl;
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}
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