logger initial commit

This commit is contained in:
UPSquared 2018-05-21 19:13:18 +03:00 committed by Stefan Andritoiu
parent 9a959b578c
commit e3f1533652
2 changed files with 101 additions and 0 deletions

17
examples/c++/logger.cxx Normal file
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#include "upm_logger.hpp"
using namespace upm;
int main()
{
UPM_LOGGER::getLogLevel() = LOG_ERROR;
UPM_LOGGER().get(LOG_WARNING) << "a loop with 4 iterations";
for (int i = 0; i < 4; ++i) {
UPM_LOGGER().get(LOG_DEBUG) << "i = " << i;
}
return 0;
}

84
include/upm_logger.hpp Normal file
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#pragma once
#include <sstream>
#include <string>
#include <chrono>
#include <stdio.h>
namespace upm {
enum UpmLogLevel {
LOG_ERROR,
LOG_WARNING,
LOG_INFO,
LOG_DEBUG,
NA
};
static const std::string logLevelNames[] = {
"ERROR",
"WARNING",
"INFO",
"DEBUG",
""
};
class UPM_LOGGER {
public:
UPM_LOGGER();
virtual ~UPM_LOGGER();
std::ostringstream& get(UpmLogLevel level = LOG_INFO);
static UpmLogLevel& getLogLevel();
protected:
std::ostringstream os;
private:
UPM_LOGGER(const UPM_LOGGER&);
UPM_LOGGER& operator=(const UPM_LOGGER&);
private:
UpmLogLevel logLevel;
public:
static const std::string& getLogLevelName(UpmLogLevel level)
{
if (level < LOG_ERROR || level >= NA) {
return NULL;
}
return logLevelNames[level];
}
};
UPM_LOGGER::UPM_LOGGER() {}
UpmLogLevel& UPM_LOGGER::getLogLevel()
{
static UpmLogLevel reportingLevel = LOG_DEBUG;
return reportingLevel;
}
std::ostringstream& UPM_LOGGER::get(UpmLogLevel level)
{
using namespace std::chrono;
os << "- " << duration_cast<milliseconds>
(system_clock::now().time_since_epoch()).count();
os << " " << getLogLevelName(level) << ": ";
os << std::string(level > LOG_DEBUG ? level - LOG_DEBUG : 0, '\t');
logLevel = level;
return os;
}
UPM_LOGGER::~UPM_LOGGER()
{
if (logLevel >= UPM_LOGGER::getLogLevel()) {
os << std::endl;
fprintf(stderr, "%s", os.str().c_str());
fflush(stderr);
}
}
}