Initial logging utility implementation

- Add basic Application logging
This commit is contained in:
Jun 2022-09-18 16:11:59 -03:00
parent 7923e894e2
commit 9d9fa0e0b2
3 changed files with 92 additions and 0 deletions

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@ -0,0 +1,57 @@
#pragma once
#include <string>
/**
* @brief Basic logging class
*
* Defines helper functions for logging facility. Configured in Application::init()
*
*/
class Log
{
public:
enum LogLevel
{
FATAL,
ERROR,
WARN,
INFO,
DEBUG,
};
LogLevel level = WARN; ///< Default logging level
/**
* @brief Prints message to stdout
*
* TODO: write to configurable stream, be it stdout, stderr or even a file
*
* @param level the message level
* @param fmt the message format
* @param ... variable parameters
*/
void log(LogLevel level, const std::string &fmt, ...);
private:
inline std::string _getLabel(LogLevel level)
{
switch (level)
{
case DEBUG: return "DEBUG";
case INFO: return "INFO ";
case WARN: return "WARN ";
case ERROR: return "ERROR";
case FATAL: return "FATAL";
default: return "UNK ";
}
}
};
extern Log LOG; /// Global variable :(
#define INFO(fmt, ...) LOG.log(Log::INFO, fmt, ##__VA_ARGS__)
#define WARN(fmt, ...) LOG.log(Log::WARN, fmt, ##__VA_ARGS__)
#define ERROR(fmt, ...) LOG.log(Log::ERROR, fmt, ##__VA_ARGS__)
#define FATAL(fmt, ...) LOG.log(Log::FATAL, fmt, ##__VA_ARGS__)
#define DEBUG(fmt, ...) LOG.log(Log::DEBUG, fmt, ##__VA_ARGS__)

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@ -1,4 +1,5 @@
#include "application/application.h"
#include "application/log.h"
#include "core/gameevent.h"
#include "core/editor.h"
@ -9,8 +10,13 @@
#include "classicmode/classicfactory.h"
Log LOG;
bool Application::init()
{
LOG.level = Log::DEBUG;
DEBUG("Initializing Application");
if (!_core_factory)
return false;
@ -48,6 +54,8 @@ void Application::update(const kku::microsec& dt)
void Application::pushState(GUIState::Tag new_state)
{
DEBUG("Pushing state %d", new_state);
if (!_state_stack.empty())
_state_stack.back()->leave();
@ -57,6 +65,7 @@ void Application::pushState(GUIState::Tag new_state)
void Application::popState()
{
DEBUG("Popping state");
_state_stack.back()->leave();
_state_stack.pop_back();
_state_stack.back()->enter();

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@ -0,0 +1,26 @@
#include <cstdarg>
#include <iostream>
#include <vector>
#include "application/log.h"
void Log::log(LogLevel level, const std::string &fmt, ...) {
if (level > this->level)
return;
va_list args;
// First va_start: count how many characters are needed for formatting
va_start(args, fmt);
size_t len = std::vsnprintf(NULL, 0, fmt.c_str(), args);
va_end(args);
std::vector<char> buf(len + 1);
// Second va_start: actually write formatted message to buffer
va_start(args, fmt);
std::vsnprintf(&buf[0], len + 1, fmt.c_str(), args);
va_end(args);
std::cout << this->_getLabel(level) << " " << &buf[0] << std::endl;
}