libsclogging/log4cpp.cpp

/*
 *  log4cpp.cpp
 *
 *  Created by Bob Polis on 05-07-2007.
 *  Copyright 2007 Thalictrum. All rights reserved.
 */

#include "log4cpp.hpp"

// UNIX
#include <unistd.h>
#include <pthread.h>
#include <sys/time.h>

// C++ Standard Library
#include <cstdio>
#include <cstdarg>
#include <cstdlib>
#include <ctime>
#include <cmath>
#include <iomanip>
#include <iostream>
#include <sstream>
#include <vector>
#include <mutex>

using namespace std;

stringstream glog;
pthread_mutex_t log4cpp_lock = PTHREAD_MUTEX_INITIALIZER;
mutex m;

void print_timestamp()
{
	// retrieve accurate time for milliseconds display
	struct timeval secs;
	(void)::gettimeofday(&secs, nullptr);
	int ms = static_cast<int>(std::roundf(secs.tv_usec / 1000.0)) % 1000;

	// create a date/time stamp
	char dtstamp[20];
	std::strftime(dtstamp, 20, "%F %T", std::localtime(&secs.tv_sec));

	std::cerr << dtstamp << "." << std::setw(3) << ms << " ";
#if __APPLE__
	std::cerr << getprogname() << "[" << getpid() << "] ";
#elif __linux__
	std::cerr << program_invocation_name << "[" << getpid() << "] ";
#endif
}

void __slog(const char* func, const char* file, int line, stringstream& ss)
{
	::pthread_mutex_lock(&log4cpp_lock);
	print_timestamp();
	string f(file);
	cerr << "(" << f.substr(f.rfind('/') + 1) << ":" << line << ") " << func << "(): " << ss.str() << endl;
	ss.str("");
	::pthread_mutex_unlock(&log4cpp_lock);
}

void _dlog(const char* func, const char* file, int line, const char* fmt, ...) {
	lock_guard<mutex> lock {m};
	print_timestamp();
	string f {file};
	va_list args1;
	va_start(args1, fmt);
	va_list args2;
	va_copy(args2, args1);
	vector<char> buf(1 + vsnprintf(nullptr, 0, fmt, args1));
	va_end(args1);
	vsnprintf(buf.data(), buf.size(), fmt, args2);
	va_end(args2);
	cerr << "(" << f.substr(f.rfind('/') + 1) << ":" << line << ") " << func << "(): " << buf.data() << endl;
}