boards/textures/font_tinycurs_0063.png

/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "log.h"

#include "threading/mutex_auto_lock.h"
#include "debug.h"
#include "gettime.h"
#include "porting.h"
#include "config.h"
#include "exceptions.h"
#include "util/numeric.h"
#include "log.h"

#include <sstream>
#include <iostream>
#include <algorithm>
#include <cerrno>
#include <cstring>

const int BUFFER_LENGTH = 256;

class StringBuffer : public std::streambuf {
public:
	StringBuffer() {
		buffer_index = 0;
	}

	int overflow(int c);
	virtual void flush(const std::string &buf) = 0;
	std::streamsize xsputn(const char *s, std::streamsize n);
	void push_back(char c);

private:
	char buffer[BUFFER_LENGTH];
	int buffer_index;
};


class LogBuffer : public StringBuffer {
public:
	LogBuffer(Logger &logger, LogLevel lev) :
		logger(logger),
		level(lev)
	{}

	void flush(const std::string &buffer);

private:
	Logger &logger;
	LogLevel level;
};


class RawLogBuffer : public StringBuffer {
public:
	void flush(const std::string &buffer);
};

////
//// Globals
////

Logger g_logger;

StreamLogOutput stdout_output(std::cout);
StreamLogOutput stderr_output(std::cerr);
std::ostream null_stream(NULL);

RawLogBuffer raw_buf;

LogBuffer none_buf(g_logger, LL_NONE);
LogBuffer error_buf(g_logger, LL_ERROR);
LogBuffer warning_buf(g_logger, LL_WARNING);
LogBuffer action_buf(g_logger, LL_ACTION);
LogBuffer info_buf(g_logger, LL_INFO);
LogBuffer verbose_buf(g_logger, LL_VERBOSE);

// Connection
std::ostream *dout_con_ptr = &null_stream;
std::ostream *derr_con_ptr = &verbosestream;

// Server
std::ostream *dout_server_ptr = &infostream;
std::ostream *derr_server_ptr = &errorstream;

#ifndef SERVER
// Client
std::ostream *dout_client_ptr = &infostream;
std::ostream *derr_client_ptr = &errorstream;
#endif

std::ostream rawstream(&raw_buf);
std::ostream dstream(&none_buf);
std::ostream errorstream(&error_buf);
std::ostream warningstream(&warning_buf);
std::ostream actionstream(&action_buf);
std::ostream infostream(&info_buf);
std::ostream verbosestream(&verbose_buf);

// Android
#ifdef __ANDROID__

static unsigned int g_level_to_android[] = {
	ANDROID_LOG_INFO,     // LL_NONE
	//ANDROID_LOG_FATAL,
	ANDROID_LOG_ERROR,    // LL_ERROR
	ANDROID_LOG_WARN,     // LL_WARNING
	ANDROID_LOG_WARN,     // LL_ACTION
	//ANDROID_LOG_INFO,
	ANDROID_LOG_DEBUG,    // LL_INFO
	ANDROID_LOG_VERBOSE,  // LL_VERBOSE
};

class AndroidSystemLogOutput : public ICombinedLogOutput {
	public:
		AndroidSystemLogOutput()
		{
			g_logger.addOutput(this);
		}
		~AndroidSystemLogOutput()
		{
			g_logger.removeOutput(this);
		}
		void logRaw(LogLevel lev, const std::string &line)
		{
			STATIC_ASSERT(ARRLEN(g_level_to_android) == LL_MAX,
				mismatch_between_android_and_internal_loglevels);
			__android_log_print(g_level_to_android[lev],
				PROJECT_NAME_C, "%s", line.c_str());
		}
};

AndroidSystemLogOutput g_android_log_output;

#endif

///////////////////////////////////////////////////////////////////////////////


////
//// Logger
////

LogLevel Logger::stringToLevel(const std::string &name)
{
	if (name == "none")
		return LL_NONE;
	else if (name == "error")
		return LL_ERROR;
	else if (name == "warning")
		return LL_WARNING;
	else if (name == "action")
		return LL_ACTION;
	else if (name == "info")
		return LL_INFO;
	else if (name == "verbose")
		return LL_VERBOSE;
	else
		return LL_MAX;
}

void Logger::addOutput(ILogOutput *out)
{
	addOutputMaxLevel(out, (LogLevel)(LL_MAX - 1));
}

void Logger::addOutput(ILogOutput *out, LogLevel lev)
{
	m_outputs[lev].push_back(out);
}

void Logger::addOutputMasked(ILogOutput *out, LogLevelMask mask)
{
	for (size_t i = 0; i < LL_MAX; i++) {
		if (mask & LOGLEVEL_TO_MASKLEVEL(i))
			m_outputs[i].push_back(out);
	}
}

void Logger::addOutputMaxLevel(ILogOutput *out, LogLevel lev)
{
	assert(lev < LL_MAX);
	for (size_t i = 0; i <= lev; i++)
		m_outputs[i].push_back(out);
}

LogLevelMask Logger::removeOutput(ILogOutput *out)
{
	LogLevelMask ret_mask = 0;
	for (size_t i = 0; i < LL_MAX; i++) {
		std::vector<ILogOutput *>::iterator it;

		it = std::find(m_outputs[i].begin(), m_outputs[i].end(), out);
		if (it != m_outputs[i].end()) {
			ret_mask |= LOGLEVEL_TO_MASKLEVEL(i);
			m_outputs[i].erase(it);
		}
	}
	return ret_mask;
}

void Logger::setLevelSilenced(LogLevel lev, bool silenced)
{
	m_silenced_levels[lev] = silenced;
}

void Logger::registerThread(const std::string &name)
{
	std::thread::id id = std::this_thread::get_id();
	MutexAutoLock lock(m_mutex);
	m_thread_names[id] = name;
}

void Logger::deregisterThread()
{
	std::thread::id id = std::this_thread::get_id();
	MutexAutoLock lock(m_mutex);
	m_thread_names.erase(id);
}

const std::string Logger::getLevelLabel(LogLevel lev)
{
	static const std::string names[] = {
		"",
		"ERROR",
		"WARNING",
		"ACTION",
		"INFO",
		"VERBOSE",
	};
	assert(lev < LL_MAX && lev >= 0);
	STATIC_ASSERT(ARRLEN(names) == LL_MAX,
		mismatch_between_loglevel_names_and_enum);
	return names[lev];
}

const std::string Logger::getThreadName()
{
	std::map<std::thread::id, std::string>::const_iterator it;

	std::thread::id id = std::this_thread::get_id();
	it = m_thread_names.find(id);
	if (it != m_thread_names.end())
		return it->second;

	std::ostringstream os;
	os << "#0x" << std::hex << id;
	return os.str();
}

void Logger::log(LogLevel lev, const std::string &text)
{
	if (m_silenced_levels[lev])
		return;

	const std::string thread_name = getThreadName();
	const std::string label = getLevelLabel(lev);
	const std::string timestamp = getTimestamp();
	std::ostringstream os(std::ios_base::binary);
	os << timestamp << ": " << label << "[" << thread_name << "]: " << text;

	logToOutputs(lev, os.str(), timestamp, thread_name, text);
ofs	hex dump	ascii
0000	89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 00 00 00 06 00 00 00 13 08 04 00 00 00 19 de b4	.PNG........IHDR................
0020	eb 00 00 00 04 67 41 4d 41 00 00 b1 8f 0b fc 61 05 00 00 00 20 63 48 52 4d 00 00 7a 26 00 00 80	.....gAMA......a.....cHRM..z&...
0040	84 00 00 fa 00 00 00 80 e8 00 00 75 30 00 00 ea 60 00 00 3a 98 00 00 17 70 9c ba 51 3c 00 00 00	...........u0...`..:....p..Q<...
0060	02 62 4b 47 44 00 00 aa 8d 23 32 00 00 00 07 74 49 4d 45 07 e2 07 01 14 12 14 e4 c5 04 5e 00 00	.bKGD....#2....tIME..........^..
0080	00 20 49 44 41 54 08 d7 63 60 a0 1f f8 cf f0 1f c1 44 90 08 51 06 06 26 64 f5 8c 48 72 8c d4 75	..IDAT..c`.......D..Q..&d..Hr..u
00a0	0a 00 d7 b7 05 ff 39 ec be e1 00 00 00 25 74 45 58 74 64 61 74 65 3a 63 72 65 61 74 65 00 32 30	......9......%tEXtdate:create.20
00c0	31 38 2d 30 37 2d 30 31 54 32 30 3a 31 38 3a 32 30 2b 30 32 3a 30 30 fc 77 f7 7a 00 00 00 25 74	18-07-01T20:18:20+02:00.w.z...%t
00e0	45 58 74 64 61 74 65 3a 6d 6f 64 69 66 79 00 32 30 31 38 2d 30 37 2d 30 31 54 32 30 3a 31 38 3a	EXtdate:modify.2018-07-01T20:18:
0100	32 30 2b 30 32 3a 30 30 8d 2a 4f c6 00 00 00 07 74 45 58 74 6c 61 62 65 6c 00 63 49 bd fb a9 00	20+02:00.*O.....tEXtlabel.cI....
0120	00 00 00 49 45 4e 44 ae 42 60 82	...IEND.B`.