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LOG_DEBUG.h
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//
Taken from here: http://www.drdobbs.com/cpp/logging-in-c/201804215
//
Original author: Petru Marginean <petru.marginean@gmail.com>
//
Modified by: Czarek Tomczak <czarek.tomczak@gmail.com>
//
Usage:
//
LOG_DEBUG << "Browser: someVar = " << someVar;
//
Warning:
//
Log is written when ~Log() destructor is called, which
//
occurs when outside of scope. This could result in log
//
not being written if program crashes before code goes
//
outside of current scope. You could embrace LOG_DEBUG
//
statements with braces {} to guarantee the log to be
//
written immediately.
#
ifndef
__LOG_H__
#
define
__LOG_H__
#
include
<
sstream
>
#
include
<
string
>
#
include
<
stdio.h
>
#
include
"
DebugLog.h
"
inline
std::string
NowTime
();
enum
TLogLevel {logERROR, logWARNING, logINFO, logDEBUG,
logDEBUG1, logDEBUG2, logDEBUG3, logDEBUG4};
template
<
typename
T>
class
Log
{
public:
Log
();
virtual
~Log
();
std::ostringstream&
Get
(TLogLevel level = logINFO);
public:
static
TLogLevel&
ReportingLevel
();
static
std::string
ToString
(TLogLevel level);
static
TLogLevel
FromString
(
const
std::string& level);
protected:
std::ostringstream os;
private:
Log
(
const
Log&);
Log&
operator
=(
const
Log&);
};
template
<
typename
T>
Log<T>::Log()
{
}
template
<
typename
T>
std::ostringstream& Log<T>::Get(TLogLevel level)
{
//
os << "- " << NowTime();
//
os << " " << ToString(level) << ": ";
//
os << std::string(level > logDEBUG ? level - logDEBUG : 0, '\t');
return
os;
}
template
<
typename
T>
Log<T>::
~Log
()
{
os << std::endl;
/*
if (T::Stream() != stderr) {
fprintf(stderr, "%s", os.str().c_str());
fflush(stderr);
}
T::Output(os.str());
*/
DebugLog
(os.
str
().
c_str
());
}
template
<
typename
T>
TLogLevel& Log<T>::ReportingLevel()
{
static
TLogLevel reportingLevel = logDEBUG4;
return
reportingLevel;
}
template
<
typename
T>
std::string Log<T>::ToString(TLogLevel level)
{
static
const
char
*
const
buffer[] = {
"
ERROR
"
,
"
WARNING
"
,
"
INFO
"
,
"
DEBUG
"
,
"
DEBUG1
"
,
"
DEBUG2
"
,
"
DEBUG3
"
,
"
DEBUG4
"
};
return
buffer[level];
}
template
<
typename
T>
TLogLevel Log<T>::FromString(
const
std::string& level)
{
if
(level ==
"
DEBUG4
"
)
return
logDEBUG4;
if
(level ==
"
DEBUG3
"
)
return
logDEBUG3;
if
(level ==
"
DEBUG2
"
)
return
logDEBUG2;
if
(level ==
"
DEBUG1
"
)
return
logDEBUG1;
if
(level ==
"
DEBUG
"
)
return
logDEBUG;
if
(level ==
"
INFO
"
)
return
logINFO;
if
(level ==
"
WARNING
"
)
return
logWARNING;
if
(level ==
"
ERROR
"
)
return
logERROR;
Log<T>().
Get
(logWARNING) <<
"
Unknown logging level '
"
<< level
<<
"
'. Using INFO level as default.
"
;
return
logINFO;
}
class
Output2FILE
{
public:
static
FILE
*&
Stream
();
static
void
Output
(
const
std::string& msg);
};
inline
FILE
*&
Output2FILE::Stream
()
{
static
FILE
* pStream = stderr;
return
pStream;
}
inline
void
Output2FILE::Output
(
const
std::string& msg)
{
/*
FILE* pStream = Stream();
if (!pStream)
return;
fprintf(pStream, "%s", msg.c_str());
fflush(pStream);
*/
}
#
if
defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
#
if
defined (BUILDING_FILELOG_DLL)
#
define
FILELOG_DECLSPEC
__declspec
(dllexport)
#
elif
defined (USING_FILELOG_DLL)
#
define
FILELOG_DECLSPEC
__declspec
(dllimport)
#
else
#
define
FILELOG_DECLSPEC
#
endif
//
BUILDING_DBSIMPLE_DLL
#
else
#
define
FILELOG_DECLSPEC
#
endif
//
_WIN32
class
FILELOG_DECLSPEC
FILELog : public Log<Output2FILE> {};
//
typedef Log<Output2FILE> FILELog;
#
ifndef
FILELOG_MAX_LEVEL
#
define
FILELOG_MAX_LEVEL
logDEBUG4
#
endif
#
define
LOG
(
level
) \
if
(level >
FILELOG_MAX_LEVEL
) ;\
else
if
(level >
FILELog::ReportingLevel
() || !Output2FILE::Stream()) ; \
else
FILELog().Get(level) \
#
define
LOG_ERROR
LOG
(logERROR)
#
define
LOG_WARNING
LOG
(logWARNING)
#
define
LOG_INFO
LOG
(logINFO)
#
define
LOG_DEBUG
LOG
(logDEBUG)
#
if
defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
#
include
<
windows.h
>
inline
std::string
NowTime
()
{
const
int
MAX_LEN
=
200
;
char
buffer[
MAX_LEN
];
if
(
GetTimeFormatA
(
LOCALE_USER_DEFAULT
,
0
,
0
,
"
HH':'mm':'ss
"
, buffer,
MAX_LEN
) ==
0
)
return
"
Error in NowTime()
"
;
char
result[
100
] = {
0
};
static
DWORD
first =
GetTickCount
();
#
pragma
warning(suppress: 4996)
sprintf
(result,
"
%s.%03ld
"
, buffer, (
long
)(
GetTickCount
() - first) %
1000
);
return
result;
}
#
else
#
include
<
sys/time.h
>
inline
std::string
NowTime
()
{
char
buffer[
11
];
time_t
t;
time
(&t);
tm r = {
0
};
strftime
(buffer,
sizeof
(buffer),
"
%X
"
,
localtime_r
(&t, &r));
struct
timeval
tv;
gettimeofday
(&tv,
0
);
char
result[
100
] = {
0
};
sprintf
(result,
"
%s.%03ld
"
, buffer, (
long
)tv.
tv_usec
/
1000
);
return
result;
}
#
endif
//
WIN32
#
endif
//
__LOG_H__
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