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log4cplus simple configuration
text - December 2, 2016 - 13:08
ConsoleAppender appender onlylog4cplus.appender.A0 = log4cplus::ConsoleAppender
log4cplus.appender.A1 = log4cplus::ConsoleAppender
log4cplus.appender.A1.layout = log4cplus::TTCCLayout
# DateFormat uses strftime format
log4cplus.appender.A1.layout.DateFormat=[%F %T]
log4cplus.appender.A1.layout.ContextPrinting=false
log4cplus.appender.A1.layout.ThreadPrinting=false
log4cplus.appender.A1.layout.CategoryPrefixing=true
log4cplus.appender.A2 = log4cplus::ConsoleAppender
log4cplus.appender.A2.layout = log4cplus::PatternLayout
# %F/%L : file line
# %b : file body
# %n : newline
# %H : hostname (fully)
# %m : message
# %M : function name __FUNCTION__
# %p : loglevel
# %t : thread
# %i : pid
log4cplus.appender.A2.layout.ConversionPattern=%p ; %H ; %i ; %t ; %F ; %L ; %m %n
log4cplus.logger.l_log=DEBUG, A2
Logging macros (stdout or log4cplus)
c++ - December 2, 2016 - 13:06 # l_log options- L_NO_TRACE : disable all trace
- L_USE_LOG4CPLUS : use log4cplus instead of stdout or stderr
- L_DBG_NO_DUMP_ARGS : disable debug dump of args
- L_PREFIX : string used as prefix for macro (logger name for log4cplus)
# l_log API macros
- L_DBG(x) : debug
- L_DBG_FTRACE() : in/out debug trace in functions (use only once per function as first instruction)
- L_INF(x) : info
- L_ERR(x) : errror
- L_INIT() : initializes log4cplus
- L_DBG_DUMP_ARGS_0() : print function name
- L_DBG_DUMP_ARGS_1(a) .. L_DBG_DUMP_ARGS_5(a, b, c, d, e) : print variable(s) name and its value
/*
* l_log.h
*
* Created on: 30 mai 2012
* Author: Ludo
*
* Updated on: 2016-12-03
* Author: Ludo (Ludorg ludorg[at]ludorg[dot]net)
*
*/
// l_log options
// L_NO_TRACE
// L_USE_LOG4CPLUS
// L_DBG_NO_DUMP_ARGS
// L_PREFIX
// l_log API
// L_DBG(x)
// L_DBG_FTRACE()
// L_INF(x)
// L_ERR(x)
// L_DBG_DUMP_ARGS_0()
// L_DBG_DUMP_ARGS_1(a)
// L_DBG_DUMP_ARGS_2(a, b)
// L_DBG_DUMP_ARGS_3(a, b, c)
// L_DBG_DUMP_ARGS_4(a, b, c, d)
// L_DBG_DUMP_ARGS_5(a, b, c, d, e)
// L_INIT()
#ifndef L_LOG_H_INCLUDED
#define L_LOG_H_INCLUDED
#ifndef L_PREFIX
#define L_PREFIX "l_log"
#endif
#ifndef L_NO_TRACE
// for Visual Studio
// cl /DL_PREFIX=\"hextor\" main_log_test.cpp
#ifdef _MSC_VER
#define __PRETTY_FUNCTION__ __FUNCSIG__
#endif
#ifdef L_USE_LOG4CPLUS
// tested with bash ubuntu for windows (gcc -v) gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
// -std=c++11 is required by log4cplus !!
// g++ -std=c++11 -DL_PREFIX=\"hextor\" -DL_USE_LOG4CPLUS main_log_test.cpp -llog4cplus
#include <log4cplus/log4cplus.h>
#define L_DBG(x) LOG4CPLUS_DEBUG(log4cplus::Logger::getInstance(LOG4CPLUS_TEXT(L_PREFIX)), x)
#define L_INF(x) LOG4CPLUS_INFO(log4cplus::Logger::getInstance(LOG4CPLUS_TEXT(L_PREFIX)), x)
#define L_ERR(x) LOG4CPLUS_ERROR(log4cplus::Logger::getInstance(LOG4CPLUS_TEXT(L_PREFIX)), x)
#define L_INIT() \
log4cplus::Initializer initializer; \
log4cplus::PropertyConfigurator::doConfigure(L_PREFIX ".properties");
#else // not(L_USE_LOG4CPLUS)
#include <iostream>
#define L_DBG(x) \
std::cout << L_PREFIX << ":debug> " << x; \
std::cout << std::endl
#define L_INF(x) \
std::cout << L_PREFIX << ":info> " << x; \
std::cout << std::endl
#define L_ERR(x) \
std::cerr << L_PREFIX << ":error> " << x; \
std::cerr << std::endl
#define L_INIT()
#endif // L_USE_LOG4CPLUS
namespace l_log
{
class in_out_func_logger
{
const char *name_;
public:
in_out_func_logger(const char *name) : name_(name) { L_DBG(name_ << " >>>IN>>> "); }
~in_out_func_logger() { L_DBG(name_ << " <<OUT<<< "); }
};
}
#define L_DBG_FTRACE() l_log::in_out_func_logger _l_log_iof_logger(__PRETTY_FUNCTION__)
#else
#define L_DBG(x)
#define L_DBG_FTRACE()
#define L_INF(x)
#define L_ERR(x)
#define L_INIT()
#endif // L_NO_TRACE
#ifndef L_DBG_NO_DUMP_ARGS
#define L_DBG_DUMP_ARGS_0() L_DBG(__PRETTY_FUNCTION__);
#define L_DBG_DUMP_ARGS_1(a) L_DBG(__PRETTY_FUNCTION__ << " [" << #a << "=" << a << "]");
#define L_DBG_DUMP_ARGS_2(a, b) L_DBG(__PRETTY_FUNCTION__ << " [" << #a << "=" << a << " ; " << #b << "=" << b << "]");
#define L_DBG_DUMP_ARGS_3(a, b, c) L_DBG(__PRETTY_FUNCTION__ << " [" << #a << "=" << a << " ; " << #b << "=" << b << " ; " << #c << "=" << c << "]");
#define L_DBG_DUMP_ARGS_4(a, b, c, d) L_DBG(__PRETTY_FUNCTION__ << " [" << #a << "=" << a << " ; " << #b << "=" << b << " ; " << #c << "=" << c << " ; " << #d << "=" << d << "]");
#define L_DBG_DUMP_ARGS_5(a, b, c, d, e) L_DBG(__PRETTY_FUNCTION__ << " [" << #a << "=" << a << " ; " << #b << "=" << b << " ; " << #c << "=" << c << " ; " << #d << "=" << d << " ; " << #e << "=" << e << "]");
#else
#define L_DBG_DUMP_ARGS_0()
#define L_DBG_DUMP_ARGS_1(a)
#define L_DBG_DUMP_ARGS_2(a, b)
#define L_DBG_DUMP_ARGS_3(a, b, c)
#define L_DBG_DUMP_ARGS_4(a, b, c, d)
#define L_DBG_DUMP_ARGS_5(a, b, c, d, e)
#endif
#endif /* L_LOG_H_INCLUDED */
////// Usage example
#if 0
// g++ -std=c++11 -DL_PREFIX=\"hextor\" -DL_USE_LOG4CPLUS main_log_test.cpp -llog4cplus
// cl /DL_PREFIX=\"hextor\" main_log_test.cpp
#include "l_log.h"
int do_nothing(int a)
{
L_DBG_FTRACE();
L_DBG_DUMP_ARGS_1(a);
L_DBG_DUMP_ARGS_0();
return 0;
}
int main(int argc, char** argv)
{
L_INIT();
L_DBG_FTRACE();
L_INF("starting");
L_DBG_DUMP_ARGS_2(argc, argv);
L_DBG_DUMP_ARGS_3(argc, argv, argv[0]);
do_nothing(3);
L_INF("done");
return 0;
}
#endif
Endianness checker
c++ - December 2, 2016 - 06:37 Check endianness and generate endianness.cfg. This small program can be used in a first step of compilation. endianness.cfg file can be included in Makefiles.#include <stdio.h>
int main()
{
printf ( "Endianness checker by Ludo (aka Ludorg) <ludo@chaman.net> (c) 2001 Chaman Productions\n");
unsigned short word = 0x0001;
char * c= ( char * ) &word;
bool bIsBig= true;
if ( c [ 0 ] )
bIsBig = false;
FILE * f = fopen ( "endianness.cfg", "w" );
if ( bIsBig )
{
fprintf ( f, "ENDIAN_TYPE=__BIG_ENDIAN__\n" );
printf ( "System is BIG ENDIAN. File endianness.cfg updated.\n" );
}
else
{
fprintf ( f, "ENDIAN_TYPE=__LITTLE_ENDIAN__\n" );
printf ( "System is LITTLE ENDIAN. File endianness.cfg updated.\n" );
}
fclose ( f );
}